1 | //======================================================================== |
2 | // |
3 | // Splash.cc |
4 | // |
5 | //======================================================================== |
6 | |
7 | //======================================================================== |
8 | // |
9 | // Modified under the Poppler project - http://poppler.freedesktop.org |
10 | // |
11 | // All changes made under the Poppler project to this file are licensed |
12 | // under GPL version 2 or later |
13 | // |
14 | // Copyright (C) 2005-2023 Albert Astals Cid <aacid@kde.org> |
15 | // Copyright (C) 2005 Marco Pesenti Gritti <mpg@redhat.com> |
16 | // Copyright (C) 2010-2016 Thomas Freitag <Thomas.Freitag@alfa.de> |
17 | // Copyright (C) 2010 Christian Feuersänger <cfeuersaenger@googlemail.com> |
18 | // Copyright (C) 2011-2013, 2015 William Bader <williambader@hotmail.com> |
19 | // Copyright (C) 2012 Markus Trippelsdorf <markus@trippelsdorf.de> |
20 | // Copyright (C) 2012, 2017 Adrian Johnson <ajohnson@redneon.com> |
21 | // Copyright (C) 2012 Matthias Kramm <kramm@quiss.org> |
22 | // Copyright (C) 2018, 2019 Stefan Brüns <stefan.bruens@rwth-aachen.de> |
23 | // Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de> |
24 | // Copyright (C) 2019, 2020 Oliver Sander <oliver.sander@tu-dresden.de> |
25 | // Copyright (C) 2019 Marek Kasik <mkasik@redhat.com> |
26 | // Copyright (C) 2020 Tobias Deiminger <haxtibal@posteo.de> |
27 | // Copyright (C) 2021, 2024 Even Rouault <even.rouault@spatialys.com> |
28 | // |
29 | // To see a description of the changes please see the Changelog file that |
30 | // came with your tarball or type make ChangeLog if you are building from git |
31 | // |
32 | //======================================================================== |
33 | |
34 | #include <config.h> |
35 | |
36 | #include <cstdlib> |
37 | #include <cstring> |
38 | #include <climits> |
39 | #include <cassert> |
40 | #include <cmath> |
41 | #include "goo/gmem.h" |
42 | #include "goo/GooLikely.h" |
43 | #include "poppler/GfxState.h" |
44 | #include "poppler/Error.h" |
45 | #include "SplashErrorCodes.h" |
46 | #include "SplashMath.h" |
47 | #include "SplashBitmap.h" |
48 | #include "SplashState.h" |
49 | #include "SplashPath.h" |
50 | #include "SplashXPath.h" |
51 | #include "SplashXPathScanner.h" |
52 | #include "SplashPattern.h" |
53 | #include "SplashScreen.h" |
54 | #include "SplashFont.h" |
55 | #include "SplashGlyphBitmap.h" |
56 | #include "Splash.h" |
57 | #include <algorithm> |
58 | |
59 | // the MSVC math.h doesn't define this |
60 | #ifndef M_PI |
61 | # define M_PI 3.14159265358979323846 |
62 | #endif |
63 | |
64 | //------------------------------------------------------------------------ |
65 | |
66 | #define splashAAGamma 1.5 |
67 | |
68 | // distance of Bezier control point from center for circle approximation |
69 | // = (4 * (sqrt(2) - 1) / 3) * r |
70 | #define bezierCircle ((SplashCoord)0.55228475) |
71 | #define bezierCircle2 ((SplashCoord)(0.5 * 0.55228475)) |
72 | |
73 | // Divide a 16-bit value (in [0, 255*255]) by 255, returning an 8-bit result. |
74 | static inline unsigned char div255(int x) |
75 | { |
76 | return (unsigned char)((x + (x >> 8) + 0x80) >> 8); |
77 | } |
78 | |
79 | // Clip x to lie in [0, 255]. |
80 | static inline unsigned char clip255(int x) |
81 | { |
82 | return x < 0 ? 0 : x > 255 ? 255 : x; |
83 | } |
84 | |
85 | template<typename T> |
86 | inline void Guswap(T &a, T &b) |
87 | { |
88 | T tmp = a; |
89 | a = b; |
90 | b = tmp; |
91 | } |
92 | |
93 | // The PDF spec says that all pixels whose *centers* lie within the |
94 | // image target region get painted, so we want to round n+0.5 down to |
95 | // n. But this causes problems, e.g., with PDF files that fill a |
96 | // rectangle with black and then draw an image to the exact same |
97 | // rectangle, so we instead use the fill scan conversion rule. |
98 | // However, the correct rule works better for glyphs, so we also |
99 | // provide that option in fillImageMask. |
100 | #if 0 |
101 | static inline int imgCoordMungeLower(SplashCoord x) { |
102 | return splashCeil(x + 0.5) - 1; |
103 | } |
104 | static inline int imgCoordMungeUpper(SplashCoord x) { |
105 | return splashCeil(x + 0.5) - 1; |
106 | } |
107 | #else |
108 | static inline int imgCoordMungeLower(SplashCoord x) |
109 | { |
110 | return splashFloor(x); |
111 | } |
112 | static inline int imgCoordMungeUpper(SplashCoord x) |
113 | { |
114 | return splashFloor(x) + 1; |
115 | } |
116 | static inline int imgCoordMungeLowerC(SplashCoord x, bool glyphMode) |
117 | { |
118 | return glyphMode ? (splashCeil(x: x + 0.5) - 1) : splashFloor(x); |
119 | } |
120 | static inline int imgCoordMungeUpperC(SplashCoord x, bool glyphMode) |
121 | { |
122 | return glyphMode ? (splashCeil(x: x + 0.5) - 1) : (splashFloor(x) + 1); |
123 | } |
124 | #endif |
125 | |
126 | // Used by drawImage and fillImageMask to divide the target |
127 | // quadrilateral into sections. |
128 | struct ImageSection |
129 | { |
130 | int y0, y1; // actual y range |
131 | int ia0, ia1; // vertex indices for edge A |
132 | int ib0, ib1; // vertex indices for edge A |
133 | SplashCoord xa0, ya0, xa1, ya1; // edge A |
134 | SplashCoord dxdya; // slope of edge A |
135 | SplashCoord xb0, yb0, xb1, yb1; // edge B |
136 | SplashCoord dxdyb; // slope of edge B |
137 | }; |
138 | |
139 | //------------------------------------------------------------------------ |
140 | // SplashPipe |
141 | //------------------------------------------------------------------------ |
142 | |
143 | #define splashPipeMaxStages 9 |
144 | |
145 | struct SplashPipe |
146 | { |
147 | // pixel coordinates |
148 | int x, y; |
149 | |
150 | // source pattern |
151 | SplashPattern *pattern; |
152 | |
153 | // source alpha and color |
154 | unsigned char aInput; |
155 | bool usesShape; |
156 | SplashColorPtr cSrc; |
157 | SplashColor cSrcVal = {}; |
158 | |
159 | // non-isolated group alpha0 |
160 | unsigned char *alpha0Ptr; |
161 | |
162 | // knockout groups |
163 | bool knockout; |
164 | unsigned char knockoutOpacity; |
165 | |
166 | // soft mask |
167 | SplashColorPtr softMaskPtr; |
168 | |
169 | // destination alpha and color |
170 | SplashColorPtr destColorPtr; |
171 | int destColorMask; |
172 | unsigned char *destAlphaPtr; |
173 | |
174 | // shape |
175 | unsigned char shape; |
176 | |
177 | // result alpha and color |
178 | bool noTransparency; |
179 | SplashPipeResultColorCtrl resultColorCtrl; |
180 | |
181 | // non-isolated group correction |
182 | bool nonIsolatedGroup; |
183 | |
184 | // the "run" function |
185 | void (Splash::*run)(SplashPipe *pipe); |
186 | }; |
187 | |
188 | SplashPipeResultColorCtrl Splash::pipeResultColorNoAlphaBlend[] = { splashPipeResultColorNoAlphaBlendMono, splashPipeResultColorNoAlphaBlendMono, splashPipeResultColorNoAlphaBlendRGB, splashPipeResultColorNoAlphaBlendRGB, |
189 | splashPipeResultColorNoAlphaBlendRGB, splashPipeResultColorNoAlphaBlendCMYK, splashPipeResultColorNoAlphaBlendDeviceN }; |
190 | |
191 | SplashPipeResultColorCtrl Splash::pipeResultColorAlphaNoBlend[] = { splashPipeResultColorAlphaNoBlendMono, splashPipeResultColorAlphaNoBlendMono, splashPipeResultColorAlphaNoBlendRGB, splashPipeResultColorAlphaNoBlendRGB, |
192 | splashPipeResultColorAlphaNoBlendRGB, splashPipeResultColorAlphaNoBlendCMYK, splashPipeResultColorAlphaNoBlendDeviceN }; |
193 | |
194 | SplashPipeResultColorCtrl Splash::pipeResultColorAlphaBlend[] = { splashPipeResultColorAlphaBlendMono, splashPipeResultColorAlphaBlendMono, splashPipeResultColorAlphaBlendRGB, splashPipeResultColorAlphaBlendRGB, |
195 | splashPipeResultColorAlphaBlendRGB, splashPipeResultColorAlphaBlendCMYK, splashPipeResultColorAlphaBlendDeviceN }; |
196 | |
197 | //------------------------------------------------------------------------ |
198 | |
199 | static void blendXor(SplashColorPtr src, SplashColorPtr dest, SplashColorPtr blend, SplashColorMode cm) |
200 | { |
201 | int i; |
202 | |
203 | for (i = 0; i < splashColorModeNComps[cm]; ++i) { |
204 | blend[i] = src[i] ^ dest[i]; |
205 | } |
206 | } |
207 | |
208 | //------------------------------------------------------------------------ |
209 | // pipeline |
210 | //------------------------------------------------------------------------ |
211 | |
212 | inline void Splash::pipeInit(SplashPipe *pipe, int x, int y, SplashPattern *pattern, SplashColorPtr cSrc, unsigned char aInput, bool usesShape, bool nonIsolatedGroup, bool knockout, unsigned char knockoutOpacity) |
213 | { |
214 | pipeSetXY(pipe, x, y); |
215 | pipe->pattern = nullptr; |
216 | |
217 | // source color |
218 | if (pattern) { |
219 | if (pattern->isStatic()) { |
220 | pattern->getColor(x, y, c: pipe->cSrcVal); |
221 | } else { |
222 | pipe->pattern = pattern; |
223 | } |
224 | pipe->cSrc = pipe->cSrcVal; |
225 | } else { |
226 | pipe->cSrc = cSrc; |
227 | } |
228 | |
229 | // source alpha |
230 | pipe->aInput = aInput; |
231 | pipe->usesShape = usesShape; |
232 | pipe->shape = 0; |
233 | |
234 | // knockout |
235 | pipe->knockout = knockout; |
236 | pipe->knockoutOpacity = knockoutOpacity; |
237 | |
238 | // result alpha |
239 | if (aInput == 255 && !state->softMask && !usesShape && !state->inNonIsolatedGroup && !nonIsolatedGroup) { |
240 | pipe->noTransparency = true; |
241 | } else { |
242 | pipe->noTransparency = false; |
243 | } |
244 | |
245 | // result color |
246 | if (pipe->noTransparency) { |
247 | // the !state->blendFunc case is handled separately in pipeRun |
248 | pipe->resultColorCtrl = pipeResultColorNoAlphaBlend[bitmap->mode]; |
249 | } else if (!state->blendFunc) { |
250 | pipe->resultColorCtrl = pipeResultColorAlphaNoBlend[bitmap->mode]; |
251 | } else { |
252 | pipe->resultColorCtrl = pipeResultColorAlphaBlend[bitmap->mode]; |
253 | } |
254 | |
255 | // non-isolated group correction |
256 | pipe->nonIsolatedGroup = nonIsolatedGroup; |
257 | |
258 | // select the 'run' function |
259 | pipe->run = &Splash::pipeRun; |
260 | if (!pipe->pattern && pipe->noTransparency && !state->blendFunc) { |
261 | if (bitmap->mode == splashModeMono1 && !pipe->destAlphaPtr) { |
262 | pipe->run = &Splash::pipeRunSimpleMono1; |
263 | } else if (bitmap->mode == splashModeMono8 && pipe->destAlphaPtr) { |
264 | pipe->run = &Splash::pipeRunSimpleMono8; |
265 | } else if (bitmap->mode == splashModeRGB8 && pipe->destAlphaPtr) { |
266 | pipe->run = &Splash::pipeRunSimpleRGB8; |
267 | } else if (bitmap->mode == splashModeXBGR8 && pipe->destAlphaPtr) { |
268 | pipe->run = &Splash::pipeRunSimpleXBGR8; |
269 | } else if (bitmap->mode == splashModeBGR8 && pipe->destAlphaPtr) { |
270 | pipe->run = &Splash::pipeRunSimpleBGR8; |
271 | } else if (bitmap->mode == splashModeCMYK8 && pipe->destAlphaPtr) { |
272 | pipe->run = &Splash::pipeRunSimpleCMYK8; |
273 | } else if (bitmap->mode == splashModeDeviceN8 && pipe->destAlphaPtr) { |
274 | pipe->run = &Splash::pipeRunSimpleDeviceN8; |
275 | } |
276 | } else if (!pipe->pattern && !pipe->noTransparency && !state->softMask && pipe->usesShape && !(state->inNonIsolatedGroup && alpha0Bitmap->alpha) && !state->blendFunc && !pipe->nonIsolatedGroup) { |
277 | if (bitmap->mode == splashModeMono1 && !pipe->destAlphaPtr) { |
278 | pipe->run = &Splash::pipeRunAAMono1; |
279 | } else if (bitmap->mode == splashModeMono8 && pipe->destAlphaPtr) { |
280 | pipe->run = &Splash::pipeRunAAMono8; |
281 | } else if (bitmap->mode == splashModeRGB8 && pipe->destAlphaPtr) { |
282 | pipe->run = &Splash::pipeRunAARGB8; |
283 | } else if (bitmap->mode == splashModeXBGR8 && pipe->destAlphaPtr) { |
284 | pipe->run = &Splash::pipeRunAAXBGR8; |
285 | } else if (bitmap->mode == splashModeBGR8 && pipe->destAlphaPtr) { |
286 | pipe->run = &Splash::pipeRunAABGR8; |
287 | } else if (bitmap->mode == splashModeCMYK8 && pipe->destAlphaPtr) { |
288 | pipe->run = &Splash::pipeRunAACMYK8; |
289 | } else if (bitmap->mode == splashModeDeviceN8 && pipe->destAlphaPtr) { |
290 | pipe->run = &Splash::pipeRunAADeviceN8; |
291 | } |
292 | } |
293 | } |
294 | |
295 | // general case |
296 | void Splash::pipeRun(SplashPipe *pipe) |
297 | { |
298 | unsigned char aSrc, aDest, alphaI, alphaIm1, alpha0, aResult; |
299 | SplashColor cSrcNonIso, cDest, cBlend; |
300 | SplashColorPtr cSrc; |
301 | unsigned char cResult0, cResult1, cResult2, cResult3; |
302 | int t; |
303 | int cp, mask; |
304 | unsigned char cResult[SPOT_NCOMPS + 4]; |
305 | |
306 | //----- source color |
307 | |
308 | // static pattern: handled in pipeInit |
309 | // fixed color: handled in pipeInit |
310 | |
311 | // dynamic pattern |
312 | if (pipe->pattern) { |
313 | if (!pipe->pattern->getColor(x: pipe->x, y: pipe->y, c: pipe->cSrcVal)) { |
314 | pipeIncX(pipe); |
315 | return; |
316 | } |
317 | if (bitmap->mode == splashModeCMYK8 || bitmap->mode == splashModeDeviceN8) { |
318 | if (state->fillOverprint && state->overprintMode && pipe->pattern->isCMYK()) { |
319 | unsigned int overprintMask = 15; |
320 | if (pipe->cSrcVal[0] == 0) { |
321 | overprintMask &= ~1; |
322 | } |
323 | if (pipe->cSrcVal[1] == 0) { |
324 | overprintMask &= ~2; |
325 | } |
326 | if (pipe->cSrcVal[2] == 0) { |
327 | overprintMask &= ~4; |
328 | } |
329 | if (pipe->cSrcVal[3] == 0) { |
330 | overprintMask &= ~8; |
331 | } |
332 | state->overprintMask = overprintMask; |
333 | } |
334 | } |
335 | } |
336 | |
337 | if (pipe->noTransparency && !state->blendFunc) { |
338 | |
339 | //----- write destination pixel |
340 | |
341 | switch (bitmap->mode) { |
342 | case splashModeMono1: |
343 | cResult0 = state->grayTransfer[pipe->cSrc[0]]; |
344 | if (state->screen->test(x: pipe->x, y: pipe->y, value: cResult0)) { |
345 | *pipe->destColorPtr |= pipe->destColorMask; |
346 | } else { |
347 | *pipe->destColorPtr &= ~pipe->destColorMask; |
348 | } |
349 | if (!(pipe->destColorMask >>= 1)) { |
350 | pipe->destColorMask = 0x80; |
351 | ++pipe->destColorPtr; |
352 | } |
353 | break; |
354 | case splashModeMono8: |
355 | *pipe->destColorPtr++ = state->grayTransfer[pipe->cSrc[0]]; |
356 | break; |
357 | case splashModeRGB8: |
358 | *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]]; |
359 | *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]]; |
360 | *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]]; |
361 | break; |
362 | case splashModeXBGR8: |
363 | *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]]; |
364 | *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]]; |
365 | *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]]; |
366 | *pipe->destColorPtr++ = 255; |
367 | break; |
368 | case splashModeBGR8: |
369 | *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]]; |
370 | *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]]; |
371 | *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]]; |
372 | break; |
373 | case splashModeCMYK8: |
374 | if (state->overprintMask & 1) { |
375 | pipe->destColorPtr[0] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[0] + state->cmykTransferC[pipe->cSrc[0]], b: 255) : state->cmykTransferC[pipe->cSrc[0]]; |
376 | } |
377 | if (state->overprintMask & 2) { |
378 | pipe->destColorPtr[1] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[1] + state->cmykTransferM[pipe->cSrc[1]], b: 255) : state->cmykTransferM[pipe->cSrc[1]]; |
379 | } |
380 | if (state->overprintMask & 4) { |
381 | pipe->destColorPtr[2] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[2] + state->cmykTransferY[pipe->cSrc[2]], b: 255) : state->cmykTransferY[pipe->cSrc[2]]; |
382 | } |
383 | if (state->overprintMask & 8) { |
384 | pipe->destColorPtr[3] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[3] + state->cmykTransferK[pipe->cSrc[3]], b: 255) : state->cmykTransferK[pipe->cSrc[3]]; |
385 | } |
386 | pipe->destColorPtr += 4; |
387 | break; |
388 | case splashModeDeviceN8: |
389 | mask = 1; |
390 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
391 | if (state->overprintMask & mask) { |
392 | pipe->destColorPtr[cp] = state->deviceNTransfer[cp][pipe->cSrc[cp]]; |
393 | } |
394 | mask <<= 1; |
395 | } |
396 | pipe->destColorPtr += (SPOT_NCOMPS + 4); |
397 | break; |
398 | } |
399 | if (pipe->destAlphaPtr) { |
400 | *pipe->destAlphaPtr++ = 255; |
401 | } |
402 | |
403 | } else { |
404 | |
405 | //----- read destination pixel |
406 | |
407 | unsigned char *destColorPtr; |
408 | if (pipe->shape && state->blendFunc && pipe->knockout && alpha0Bitmap != nullptr) { |
409 | destColorPtr = alpha0Bitmap->data + (alpha0Y + pipe->y) * alpha0Bitmap->rowSize; |
410 | switch (bitmap->mode) { |
411 | case splashModeMono1: |
412 | destColorPtr += (alpha0X + pipe->x) / 8; |
413 | break; |
414 | case splashModeMono8: |
415 | destColorPtr += (alpha0X + pipe->x); |
416 | break; |
417 | case splashModeRGB8: |
418 | case splashModeBGR8: |
419 | destColorPtr += (alpha0X + pipe->x) * 3; |
420 | break; |
421 | case splashModeXBGR8: |
422 | case splashModeCMYK8: |
423 | destColorPtr += (alpha0X + pipe->x) * 4; |
424 | break; |
425 | case splashModeDeviceN8: |
426 | destColorPtr += (alpha0X + pipe->x) * (SPOT_NCOMPS + 4); |
427 | break; |
428 | } |
429 | } else { |
430 | destColorPtr = pipe->destColorPtr; |
431 | } |
432 | switch (bitmap->mode) { |
433 | case splashModeMono1: |
434 | cDest[0] = (*destColorPtr & pipe->destColorMask) ? 0xff : 0x00; |
435 | break; |
436 | case splashModeMono8: |
437 | cDest[0] = *destColorPtr; |
438 | break; |
439 | case splashModeRGB8: |
440 | cDest[0] = destColorPtr[0]; |
441 | cDest[1] = destColorPtr[1]; |
442 | cDest[2] = destColorPtr[2]; |
443 | break; |
444 | case splashModeXBGR8: |
445 | cDest[0] = destColorPtr[2]; |
446 | cDest[1] = destColorPtr[1]; |
447 | cDest[2] = destColorPtr[0]; |
448 | cDest[3] = 255; |
449 | break; |
450 | case splashModeBGR8: |
451 | cDest[0] = destColorPtr[2]; |
452 | cDest[1] = destColorPtr[1]; |
453 | cDest[2] = destColorPtr[0]; |
454 | break; |
455 | case splashModeCMYK8: |
456 | cDest[0] = destColorPtr[0]; |
457 | cDest[1] = destColorPtr[1]; |
458 | cDest[2] = destColorPtr[2]; |
459 | cDest[3] = destColorPtr[3]; |
460 | break; |
461 | case splashModeDeviceN8: |
462 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
463 | cDest[cp] = destColorPtr[cp]; |
464 | } |
465 | break; |
466 | } |
467 | if (pipe->destAlphaPtr) { |
468 | aDest = *pipe->destAlphaPtr; |
469 | } else { |
470 | aDest = 0xff; |
471 | } |
472 | |
473 | //----- source alpha |
474 | |
475 | if (state->softMask) { |
476 | if (pipe->usesShape) { |
477 | aSrc = div255(x: div255(x: pipe->aInput * *pipe->softMaskPtr++) * pipe->shape); |
478 | } else { |
479 | aSrc = div255(x: pipe->aInput * *pipe->softMaskPtr++); |
480 | } |
481 | } else if (pipe->usesShape) { |
482 | aSrc = div255(x: pipe->aInput * pipe->shape); |
483 | } else { |
484 | aSrc = pipe->aInput; |
485 | } |
486 | |
487 | //----- non-isolated group correction |
488 | |
489 | if (pipe->nonIsolatedGroup) { |
490 | // This path is only used when Splash::composite() is called to |
491 | // composite a non-isolated group onto the backdrop. In this |
492 | // case, pipe->shape is the source (group) alpha. |
493 | if (pipe->shape == 0) { |
494 | // this value will be multiplied by zero later, so it doesn't |
495 | // matter what we use |
496 | cSrc = pipe->cSrc; |
497 | } else { |
498 | t = (aDest * 255) / pipe->shape - aDest; |
499 | switch (bitmap->mode) { |
500 | case splashModeDeviceN8: |
501 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
502 | cSrcNonIso[cp] = clip255(x: pipe->cSrc[cp] + ((pipe->cSrc[cp] - cDest[cp]) * t) / 255); |
503 | } |
504 | break; |
505 | case splashModeCMYK8: |
506 | for (cp = 0; cp < 4; cp++) { |
507 | cSrcNonIso[cp] = clip255(x: pipe->cSrc[cp] + ((pipe->cSrc[cp] - cDest[cp]) * t) / 255); |
508 | } |
509 | break; |
510 | case splashModeXBGR8: |
511 | cSrcNonIso[3] = 255; |
512 | // fallthrough |
513 | case splashModeRGB8: |
514 | case splashModeBGR8: |
515 | cSrcNonIso[2] = clip255(x: pipe->cSrc[2] + ((pipe->cSrc[2] - cDest[2]) * t) / 255); |
516 | cSrcNonIso[1] = clip255(x: pipe->cSrc[1] + ((pipe->cSrc[1] - cDest[1]) * t) / 255); |
517 | // fallthrough |
518 | case splashModeMono1: |
519 | case splashModeMono8: |
520 | cSrcNonIso[0] = clip255(x: pipe->cSrc[0] + ((pipe->cSrc[0] - cDest[0]) * t) / 255); |
521 | break; |
522 | } |
523 | cSrc = cSrcNonIso; |
524 | // knockout: remove backdrop color |
525 | if (pipe->knockout && pipe->shape >= pipe->knockoutOpacity) { |
526 | aDest = 0; |
527 | } |
528 | } |
529 | } else { |
530 | cSrc = pipe->cSrc; |
531 | } |
532 | |
533 | //----- blend function |
534 | |
535 | if (state->blendFunc) { |
536 | if (bitmap->mode == splashModeDeviceN8) { |
537 | for (int k = 4; k < 4 + SPOT_NCOMPS; k++) { |
538 | cBlend[k] = 0; |
539 | } |
540 | } |
541 | (*state->blendFunc)(cSrc, cDest, cBlend, bitmap->mode); |
542 | } |
543 | |
544 | //----- result alpha and non-isolated group element correction |
545 | |
546 | if (pipe->noTransparency) { |
547 | alphaI = alphaIm1 = aResult = 255; |
548 | } else { |
549 | aResult = aSrc + aDest - div255(x: aSrc * aDest); |
550 | |
551 | // alphaI = alpha_i |
552 | // alphaIm1 = alpha_(i-1) |
553 | if (pipe->alpha0Ptr) { |
554 | alpha0 = *pipe->alpha0Ptr++; |
555 | alphaI = aResult + alpha0 - div255(x: aResult * alpha0); |
556 | alphaIm1 = alpha0 + aDest - div255(x: alpha0 * aDest); |
557 | } else { |
558 | alphaI = aResult; |
559 | alphaIm1 = aDest; |
560 | } |
561 | } |
562 | |
563 | //----- result color |
564 | |
565 | cResult0 = cResult1 = cResult2 = cResult3 = 0; // make gcc happy |
566 | |
567 | switch (pipe->resultColorCtrl) { |
568 | |
569 | case splashPipeResultColorNoAlphaBlendMono: |
570 | cResult0 = state->grayTransfer[div255(x: (255 - aDest) * cSrc[0] + aDest * cBlend[0])]; |
571 | break; |
572 | case splashPipeResultColorNoAlphaBlendRGB: |
573 | cResult0 = state->rgbTransferR[div255(x: (255 - aDest) * cSrc[0] + aDest * cBlend[0])]; |
574 | cResult1 = state->rgbTransferG[div255(x: (255 - aDest) * cSrc[1] + aDest * cBlend[1])]; |
575 | cResult2 = state->rgbTransferB[div255(x: (255 - aDest) * cSrc[2] + aDest * cBlend[2])]; |
576 | break; |
577 | case splashPipeResultColorNoAlphaBlendCMYK: |
578 | cResult0 = state->cmykTransferC[div255(x: (255 - aDest) * cSrc[0] + aDest * cBlend[0])]; |
579 | cResult1 = state->cmykTransferM[div255(x: (255 - aDest) * cSrc[1] + aDest * cBlend[1])]; |
580 | cResult2 = state->cmykTransferY[div255(x: (255 - aDest) * cSrc[2] + aDest * cBlend[2])]; |
581 | cResult3 = state->cmykTransferK[div255(x: (255 - aDest) * cSrc[3] + aDest * cBlend[3])]; |
582 | break; |
583 | case splashPipeResultColorNoAlphaBlendDeviceN: |
584 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
585 | cResult[cp] = state->deviceNTransfer[cp][div255(x: (255 - aDest) * cSrc[cp] + aDest * cBlend[cp])]; |
586 | } |
587 | break; |
588 | |
589 | case splashPipeResultColorAlphaNoBlendMono: |
590 | if (alphaI == 0) { |
591 | cResult0 = 0; |
592 | } else { |
593 | cResult0 = state->grayTransfer[((alphaI - aSrc) * cDest[0] + aSrc * cSrc[0]) / alphaI]; |
594 | } |
595 | break; |
596 | case splashPipeResultColorAlphaNoBlendRGB: |
597 | if (alphaI == 0) { |
598 | cResult0 = 0; |
599 | cResult1 = 0; |
600 | cResult2 = 0; |
601 | } else { |
602 | cResult0 = state->rgbTransferR[((alphaI - aSrc) * cDest[0] + aSrc * cSrc[0]) / alphaI]; |
603 | cResult1 = state->rgbTransferG[((alphaI - aSrc) * cDest[1] + aSrc * cSrc[1]) / alphaI]; |
604 | cResult2 = state->rgbTransferB[((alphaI - aSrc) * cDest[2] + aSrc * cSrc[2]) / alphaI]; |
605 | } |
606 | break; |
607 | case splashPipeResultColorAlphaNoBlendCMYK: |
608 | if (alphaI == 0) { |
609 | cResult0 = 0; |
610 | cResult1 = 0; |
611 | cResult2 = 0; |
612 | cResult3 = 0; |
613 | } else { |
614 | cResult0 = state->cmykTransferC[((alphaI - aSrc) * cDest[0] + aSrc * cSrc[0]) / alphaI]; |
615 | cResult1 = state->cmykTransferM[((alphaI - aSrc) * cDest[1] + aSrc * cSrc[1]) / alphaI]; |
616 | cResult2 = state->cmykTransferY[((alphaI - aSrc) * cDest[2] + aSrc * cSrc[2]) / alphaI]; |
617 | cResult3 = state->cmykTransferK[((alphaI - aSrc) * cDest[3] + aSrc * cSrc[3]) / alphaI]; |
618 | } |
619 | break; |
620 | case splashPipeResultColorAlphaNoBlendDeviceN: |
621 | if (alphaI == 0) { |
622 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
623 | cResult[cp] = 0; |
624 | } |
625 | } else { |
626 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
627 | cResult[cp] = state->deviceNTransfer[cp][((alphaI - aSrc) * cDest[cp] + aSrc * cSrc[cp]) / alphaI]; |
628 | } |
629 | } |
630 | break; |
631 | |
632 | case splashPipeResultColorAlphaBlendMono: |
633 | if (alphaI == 0) { |
634 | cResult0 = 0; |
635 | } else { |
636 | cResult0 = state->grayTransfer[((alphaI - aSrc) * cDest[0] + aSrc * ((255 - alphaIm1) * cSrc[0] + alphaIm1 * cBlend[0]) / 255) / alphaI]; |
637 | } |
638 | break; |
639 | case splashPipeResultColorAlphaBlendRGB: |
640 | if (alphaI == 0) { |
641 | cResult0 = 0; |
642 | cResult1 = 0; |
643 | cResult2 = 0; |
644 | } else { |
645 | cResult0 = state->rgbTransferR[((alphaI - aSrc) * cDest[0] + aSrc * ((255 - alphaIm1) * cSrc[0] + alphaIm1 * cBlend[0]) / 255) / alphaI]; |
646 | cResult1 = state->rgbTransferG[((alphaI - aSrc) * cDest[1] + aSrc * ((255 - alphaIm1) * cSrc[1] + alphaIm1 * cBlend[1]) / 255) / alphaI]; |
647 | cResult2 = state->rgbTransferB[((alphaI - aSrc) * cDest[2] + aSrc * ((255 - alphaIm1) * cSrc[2] + alphaIm1 * cBlend[2]) / 255) / alphaI]; |
648 | } |
649 | break; |
650 | case splashPipeResultColorAlphaBlendCMYK: |
651 | if (alphaI == 0) { |
652 | cResult0 = 0; |
653 | cResult1 = 0; |
654 | cResult2 = 0; |
655 | cResult3 = 0; |
656 | } else { |
657 | cResult0 = state->cmykTransferC[((alphaI - aSrc) * cDest[0] + aSrc * ((255 - alphaIm1) * cSrc[0] + alphaIm1 * cBlend[0]) / 255) / alphaI]; |
658 | cResult1 = state->cmykTransferM[((alphaI - aSrc) * cDest[1] + aSrc * ((255 - alphaIm1) * cSrc[1] + alphaIm1 * cBlend[1]) / 255) / alphaI]; |
659 | cResult2 = state->cmykTransferY[((alphaI - aSrc) * cDest[2] + aSrc * ((255 - alphaIm1) * cSrc[2] + alphaIm1 * cBlend[2]) / 255) / alphaI]; |
660 | cResult3 = state->cmykTransferK[((alphaI - aSrc) * cDest[3] + aSrc * ((255 - alphaIm1) * cSrc[3] + alphaIm1 * cBlend[3]) / 255) / alphaI]; |
661 | } |
662 | break; |
663 | case splashPipeResultColorAlphaBlendDeviceN: |
664 | if (alphaI == 0) { |
665 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
666 | cResult[cp] = 0; |
667 | } |
668 | } else { |
669 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
670 | cResult[cp] = state->deviceNTransfer[cp][((alphaI - aSrc) * cDest[cp] + aSrc * ((255 - alphaIm1) * cSrc[cp] + alphaIm1 * cBlend[cp]) / 255) / alphaI]; |
671 | } |
672 | } |
673 | break; |
674 | } |
675 | |
676 | //----- write destination pixel |
677 | |
678 | switch (bitmap->mode) { |
679 | case splashModeMono1: |
680 | if (state->screen->test(x: pipe->x, y: pipe->y, value: cResult0)) { |
681 | *pipe->destColorPtr |= pipe->destColorMask; |
682 | } else { |
683 | *pipe->destColorPtr &= ~pipe->destColorMask; |
684 | } |
685 | if (!(pipe->destColorMask >>= 1)) { |
686 | pipe->destColorMask = 0x80; |
687 | ++pipe->destColorPtr; |
688 | } |
689 | break; |
690 | case splashModeMono8: |
691 | *pipe->destColorPtr++ = cResult0; |
692 | break; |
693 | case splashModeRGB8: |
694 | *pipe->destColorPtr++ = cResult0; |
695 | *pipe->destColorPtr++ = cResult1; |
696 | *pipe->destColorPtr++ = cResult2; |
697 | break; |
698 | case splashModeXBGR8: |
699 | *pipe->destColorPtr++ = cResult2; |
700 | *pipe->destColorPtr++ = cResult1; |
701 | *pipe->destColorPtr++ = cResult0; |
702 | *pipe->destColorPtr++ = 255; |
703 | break; |
704 | case splashModeBGR8: |
705 | *pipe->destColorPtr++ = cResult2; |
706 | *pipe->destColorPtr++ = cResult1; |
707 | *pipe->destColorPtr++ = cResult0; |
708 | break; |
709 | case splashModeCMYK8: |
710 | if (state->overprintMask & 1) { |
711 | pipe->destColorPtr[0] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[0] + cResult0, b: 255) : cResult0; |
712 | } |
713 | if (state->overprintMask & 2) { |
714 | pipe->destColorPtr[1] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[1] + cResult1, b: 255) : cResult1; |
715 | } |
716 | if (state->overprintMask & 4) { |
717 | pipe->destColorPtr[2] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[2] + cResult2, b: 255) : cResult2; |
718 | } |
719 | if (state->overprintMask & 8) { |
720 | pipe->destColorPtr[3] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[3] + cResult3, b: 255) : cResult3; |
721 | } |
722 | pipe->destColorPtr += 4; |
723 | break; |
724 | case splashModeDeviceN8: |
725 | mask = 1; |
726 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
727 | if (state->overprintMask & mask) { |
728 | pipe->destColorPtr[cp] = cResult[cp]; |
729 | } |
730 | mask <<= 1; |
731 | } |
732 | pipe->destColorPtr += (SPOT_NCOMPS + 4); |
733 | break; |
734 | } |
735 | if (pipe->destAlphaPtr) { |
736 | *pipe->destAlphaPtr++ = aResult; |
737 | } |
738 | } |
739 | |
740 | ++pipe->x; |
741 | } |
742 | |
743 | // special case: |
744 | // !pipe->pattern && pipe->noTransparency && !state->blendFunc && |
745 | // bitmap->mode == splashModeMono1 && !pipe->destAlphaPtr) { |
746 | void Splash::pipeRunSimpleMono1(SplashPipe *pipe) |
747 | { |
748 | unsigned char cResult0; |
749 | |
750 | //----- write destination pixel |
751 | cResult0 = state->grayTransfer[pipe->cSrc[0]]; |
752 | if (state->screen->test(x: pipe->x, y: pipe->y, value: cResult0)) { |
753 | *pipe->destColorPtr |= pipe->destColorMask; |
754 | } else { |
755 | *pipe->destColorPtr &= ~pipe->destColorMask; |
756 | } |
757 | if (!(pipe->destColorMask >>= 1)) { |
758 | pipe->destColorMask = 0x80; |
759 | ++pipe->destColorPtr; |
760 | } |
761 | |
762 | ++pipe->x; |
763 | } |
764 | |
765 | // special case: |
766 | // !pipe->pattern && pipe->noTransparency && !state->blendFunc && |
767 | // bitmap->mode == splashModeMono8 && pipe->destAlphaPtr) { |
768 | void Splash::pipeRunSimpleMono8(SplashPipe *pipe) |
769 | { |
770 | //----- write destination pixel |
771 | *pipe->destColorPtr++ = state->grayTransfer[pipe->cSrc[0]]; |
772 | *pipe->destAlphaPtr++ = 255; |
773 | |
774 | ++pipe->x; |
775 | } |
776 | |
777 | // special case: |
778 | // !pipe->pattern && pipe->noTransparency && !state->blendFunc && |
779 | // bitmap->mode == splashModeRGB8 && pipe->destAlphaPtr) { |
780 | void Splash::pipeRunSimpleRGB8(SplashPipe *pipe) |
781 | { |
782 | //----- write destination pixel |
783 | *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]]; |
784 | *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]]; |
785 | *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]]; |
786 | *pipe->destAlphaPtr++ = 255; |
787 | |
788 | ++pipe->x; |
789 | } |
790 | |
791 | // special case: |
792 | // !pipe->pattern && pipe->noTransparency && !state->blendFunc && |
793 | // bitmap->mode == splashModeXBGR8 && pipe->destAlphaPtr) { |
794 | void Splash::pipeRunSimpleXBGR8(SplashPipe *pipe) |
795 | { |
796 | //----- write destination pixel |
797 | *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]]; |
798 | *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]]; |
799 | *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]]; |
800 | *pipe->destColorPtr++ = 255; |
801 | *pipe->destAlphaPtr++ = 255; |
802 | |
803 | ++pipe->x; |
804 | } |
805 | |
806 | // special case: |
807 | // !pipe->pattern && pipe->noTransparency && !state->blendFunc && |
808 | // bitmap->mode == splashModeBGR8 && pipe->destAlphaPtr) { |
809 | void Splash::pipeRunSimpleBGR8(SplashPipe *pipe) |
810 | { |
811 | //----- write destination pixel |
812 | *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]]; |
813 | *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]]; |
814 | *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]]; |
815 | *pipe->destAlphaPtr++ = 255; |
816 | |
817 | ++pipe->x; |
818 | } |
819 | |
820 | // special case: |
821 | // !pipe->pattern && pipe->noTransparency && !state->blendFunc && |
822 | // bitmap->mode == splashModeCMYK8 && pipe->destAlphaPtr) { |
823 | void Splash::pipeRunSimpleCMYK8(SplashPipe *pipe) |
824 | { |
825 | //----- write destination pixel |
826 | if (state->overprintMask & 1) { |
827 | pipe->destColorPtr[0] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[0] + state->cmykTransferC[pipe->cSrc[0]], b: 255) : state->cmykTransferC[pipe->cSrc[0]]; |
828 | } |
829 | if (state->overprintMask & 2) { |
830 | pipe->destColorPtr[1] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[1] + state->cmykTransferM[pipe->cSrc[1]], b: 255) : state->cmykTransferM[pipe->cSrc[1]]; |
831 | } |
832 | if (state->overprintMask & 4) { |
833 | pipe->destColorPtr[2] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[2] + state->cmykTransferY[pipe->cSrc[2]], b: 255) : state->cmykTransferY[pipe->cSrc[2]]; |
834 | } |
835 | if (state->overprintMask & 8) { |
836 | pipe->destColorPtr[3] = (state->overprintAdditive) ? std::min<int>(a: pipe->destColorPtr[3] + state->cmykTransferK[pipe->cSrc[3]], b: 255) : state->cmykTransferK[pipe->cSrc[3]]; |
837 | } |
838 | pipe->destColorPtr += 4; |
839 | *pipe->destAlphaPtr++ = 255; |
840 | |
841 | ++pipe->x; |
842 | } |
843 | |
844 | // special case: |
845 | // !pipe->pattern && pipe->noTransparency && !state->blendFunc && |
846 | // bitmap->mode == splashModeDeviceN8 && pipe->destAlphaPtr) { |
847 | void Splash::pipeRunSimpleDeviceN8(SplashPipe *pipe) |
848 | { |
849 | //----- write destination pixel |
850 | int mask = 1; |
851 | for (int cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
852 | if (state->overprintMask & mask) { |
853 | pipe->destColorPtr[cp] = state->deviceNTransfer[cp][pipe->cSrc[cp]]; |
854 | } |
855 | mask <<= 1; |
856 | } |
857 | pipe->destColorPtr += (SPOT_NCOMPS + 4); |
858 | *pipe->destAlphaPtr++ = 255; |
859 | |
860 | ++pipe->x; |
861 | } |
862 | |
863 | // special case: |
864 | // !pipe->pattern && !pipe->noTransparency && !state->softMask && |
865 | // pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc && |
866 | // !pipe->nonIsolatedGroup && |
867 | // bitmap->mode == splashModeMono1 && !pipe->destAlphaPtr |
868 | void Splash::pipeRunAAMono1(SplashPipe *pipe) |
869 | { |
870 | unsigned char aSrc; |
871 | SplashColor cDest; |
872 | unsigned char cResult0; |
873 | |
874 | //----- read destination pixel |
875 | cDest[0] = (*pipe->destColorPtr & pipe->destColorMask) ? 0xff : 0x00; |
876 | |
877 | //----- source alpha |
878 | aSrc = div255(x: pipe->aInput * pipe->shape); |
879 | |
880 | //----- result color |
881 | // note: aDest = alpha2 = aResult = 0xff |
882 | cResult0 = state->grayTransfer[(unsigned char)div255(x: (0xff - aSrc) * cDest[0] + aSrc * pipe->cSrc[0])]; |
883 | |
884 | //----- write destination pixel |
885 | if (state->screen->test(x: pipe->x, y: pipe->y, value: cResult0)) { |
886 | *pipe->destColorPtr |= pipe->destColorMask; |
887 | } else { |
888 | *pipe->destColorPtr &= ~pipe->destColorMask; |
889 | } |
890 | if (!(pipe->destColorMask >>= 1)) { |
891 | pipe->destColorMask = 0x80; |
892 | ++pipe->destColorPtr; |
893 | } |
894 | |
895 | ++pipe->x; |
896 | } |
897 | |
898 | // special case: |
899 | // !pipe->pattern && !pipe->noTransparency && !state->softMask && |
900 | // pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc && |
901 | // !pipe->nonIsolatedGroup && |
902 | // bitmap->mode == splashModeMono8 && pipe->destAlphaPtr |
903 | void Splash::pipeRunAAMono8(SplashPipe *pipe) |
904 | { |
905 | unsigned char aSrc, aDest, alpha2, aResult; |
906 | SplashColor cDest; |
907 | unsigned char cResult0; |
908 | |
909 | //----- read destination pixel |
910 | cDest[0] = *pipe->destColorPtr; |
911 | aDest = *pipe->destAlphaPtr; |
912 | |
913 | //----- source alpha |
914 | aSrc = div255(x: pipe->aInput * pipe->shape); |
915 | |
916 | //----- result alpha and non-isolated group element correction |
917 | aResult = aSrc + aDest - div255(x: aSrc * aDest); |
918 | alpha2 = aResult; |
919 | |
920 | //----- result color |
921 | if (alpha2 == 0) { |
922 | cResult0 = 0; |
923 | } else { |
924 | cResult0 = state->grayTransfer[(unsigned char)(((alpha2 - aSrc) * cDest[0] + aSrc * pipe->cSrc[0]) / alpha2)]; |
925 | } |
926 | |
927 | //----- write destination pixel |
928 | *pipe->destColorPtr++ = cResult0; |
929 | *pipe->destAlphaPtr++ = aResult; |
930 | |
931 | ++pipe->x; |
932 | } |
933 | |
934 | // special case: |
935 | // !pipe->pattern && !pipe->noTransparency && !state->softMask && |
936 | // pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc && |
937 | // !pipe->nonIsolatedGroup && |
938 | // bitmap->mode == splashModeRGB8 && pipe->destAlphaPtr |
939 | void Splash::pipeRunAARGB8(SplashPipe *pipe) |
940 | { |
941 | unsigned char aSrc, aDest, alpha2, aResult; |
942 | SplashColor cDest; |
943 | unsigned char cResult0, cResult1, cResult2; |
944 | |
945 | //----- read destination alpha |
946 | aDest = *pipe->destAlphaPtr; |
947 | |
948 | //----- source alpha |
949 | aSrc = div255(x: pipe->aInput * pipe->shape); |
950 | |
951 | //----- result color |
952 | if (aSrc == 255) { |
953 | cResult0 = state->rgbTransferR[pipe->cSrc[0]]; |
954 | cResult1 = state->rgbTransferG[pipe->cSrc[1]]; |
955 | cResult2 = state->rgbTransferB[pipe->cSrc[2]]; |
956 | aResult = 255; |
957 | |
958 | } else if (aSrc == 0 && aDest == 0) { |
959 | cResult0 = 0; |
960 | cResult1 = 0; |
961 | cResult2 = 0; |
962 | aResult = 0; |
963 | |
964 | } else { |
965 | //----- read destination pixel |
966 | cDest[0] = pipe->destColorPtr[0]; |
967 | cDest[1] = pipe->destColorPtr[1]; |
968 | cDest[2] = pipe->destColorPtr[2]; |
969 | |
970 | //----- result alpha and non-isolated group element correction |
971 | aResult = aSrc + aDest - div255(x: aSrc * aDest); |
972 | alpha2 = aResult; |
973 | |
974 | cResult0 = state->rgbTransferR[(unsigned char)(((alpha2 - aSrc) * cDest[0] + aSrc * pipe->cSrc[0]) / alpha2)]; |
975 | cResult1 = state->rgbTransferG[(unsigned char)(((alpha2 - aSrc) * cDest[1] + aSrc * pipe->cSrc[1]) / alpha2)]; |
976 | cResult2 = state->rgbTransferB[(unsigned char)(((alpha2 - aSrc) * cDest[2] + aSrc * pipe->cSrc[2]) / alpha2)]; |
977 | } |
978 | |
979 | //----- write destination pixel |
980 | *pipe->destColorPtr++ = cResult0; |
981 | *pipe->destColorPtr++ = cResult1; |
982 | *pipe->destColorPtr++ = cResult2; |
983 | *pipe->destAlphaPtr++ = aResult; |
984 | |
985 | ++pipe->x; |
986 | } |
987 | |
988 | // special case: |
989 | // !pipe->pattern && !pipe->noTransparency && !state->softMask && |
990 | // pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc && |
991 | // !pipe->nonIsolatedGroup && |
992 | // bitmap->mode == splashModeXBGR8 && pipe->destAlphaPtr |
993 | void Splash::pipeRunAAXBGR8(SplashPipe *pipe) |
994 | { |
995 | unsigned char aSrc, aDest, alpha2, aResult; |
996 | SplashColor cDest; |
997 | unsigned char cResult0, cResult1, cResult2; |
998 | |
999 | //----- read destination alpha |
1000 | aDest = *pipe->destAlphaPtr; |
1001 | |
1002 | //----- source alpha |
1003 | aSrc = div255(x: pipe->aInput * pipe->shape); |
1004 | |
1005 | //----- result color |
1006 | if (aSrc == 255) { |
1007 | cResult0 = state->rgbTransferR[pipe->cSrc[0]]; |
1008 | cResult1 = state->rgbTransferG[pipe->cSrc[1]]; |
1009 | cResult2 = state->rgbTransferB[pipe->cSrc[2]]; |
1010 | aResult = 255; |
1011 | |
1012 | } else if (aSrc == 0 && aDest == 0) { |
1013 | cResult0 = 0; |
1014 | cResult1 = 0; |
1015 | cResult2 = 0; |
1016 | aResult = 0; |
1017 | |
1018 | } else { |
1019 | //----- read destination color |
1020 | cDest[0] = pipe->destColorPtr[2]; |
1021 | cDest[1] = pipe->destColorPtr[1]; |
1022 | cDest[2] = pipe->destColorPtr[0]; |
1023 | |
1024 | //----- result alpha and non-isolated group element correction |
1025 | aResult = aSrc + aDest - div255(x: aSrc * aDest); |
1026 | alpha2 = aResult; |
1027 | |
1028 | cResult0 = state->rgbTransferR[(unsigned char)(((alpha2 - aSrc) * cDest[0] + aSrc * pipe->cSrc[0]) / alpha2)]; |
1029 | cResult1 = state->rgbTransferG[(unsigned char)(((alpha2 - aSrc) * cDest[1] + aSrc * pipe->cSrc[1]) / alpha2)]; |
1030 | cResult2 = state->rgbTransferB[(unsigned char)(((alpha2 - aSrc) * cDest[2] + aSrc * pipe->cSrc[2]) / alpha2)]; |
1031 | } |
1032 | |
1033 | //----- write destination pixel |
1034 | *pipe->destColorPtr++ = cResult2; |
1035 | *pipe->destColorPtr++ = cResult1; |
1036 | *pipe->destColorPtr++ = cResult0; |
1037 | *pipe->destColorPtr++ = 255; |
1038 | *pipe->destAlphaPtr++ = aResult; |
1039 | |
1040 | ++pipe->x; |
1041 | } |
1042 | |
1043 | // special case: |
1044 | // !pipe->pattern && !pipe->noTransparency && !state->softMask && |
1045 | // pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc && |
1046 | // !pipe->nonIsolatedGroup && |
1047 | // bitmap->mode == splashModeBGR8 && pipe->destAlphaPtr |
1048 | void Splash::pipeRunAABGR8(SplashPipe *pipe) |
1049 | { |
1050 | unsigned char aSrc, aDest, alpha2, aResult; |
1051 | SplashColor cDest; |
1052 | unsigned char cResult0, cResult1, cResult2; |
1053 | |
1054 | //----- read destination alpha |
1055 | aDest = *pipe->destAlphaPtr; |
1056 | |
1057 | //----- source alpha |
1058 | aSrc = div255(x: pipe->aInput * pipe->shape); |
1059 | |
1060 | //----- result color |
1061 | if (aSrc == 255) { |
1062 | cResult0 = state->rgbTransferR[pipe->cSrc[0]]; |
1063 | cResult1 = state->rgbTransferG[pipe->cSrc[1]]; |
1064 | cResult2 = state->rgbTransferB[pipe->cSrc[2]]; |
1065 | aResult = 255; |
1066 | |
1067 | } else if (aSrc == 0 && aDest == 0) { |
1068 | cResult0 = 0; |
1069 | cResult1 = 0; |
1070 | cResult2 = 0; |
1071 | aResult = 0; |
1072 | |
1073 | } else { |
1074 | //----- read destination color |
1075 | cDest[0] = pipe->destColorPtr[2]; |
1076 | cDest[1] = pipe->destColorPtr[1]; |
1077 | cDest[2] = pipe->destColorPtr[0]; |
1078 | |
1079 | //----- result alpha and non-isolated group element correction |
1080 | aResult = aSrc + aDest - div255(x: aSrc * aDest); |
1081 | alpha2 = aResult; |
1082 | |
1083 | cResult0 = state->rgbTransferR[(unsigned char)(((alpha2 - aSrc) * cDest[0] + aSrc * pipe->cSrc[0]) / alpha2)]; |
1084 | cResult1 = state->rgbTransferG[(unsigned char)(((alpha2 - aSrc) * cDest[1] + aSrc * pipe->cSrc[1]) / alpha2)]; |
1085 | cResult2 = state->rgbTransferB[(unsigned char)(((alpha2 - aSrc) * cDest[2] + aSrc * pipe->cSrc[2]) / alpha2)]; |
1086 | } |
1087 | |
1088 | //----- write destination pixel |
1089 | *pipe->destColorPtr++ = cResult2; |
1090 | *pipe->destColorPtr++ = cResult1; |
1091 | *pipe->destColorPtr++ = cResult0; |
1092 | *pipe->destAlphaPtr++ = aResult; |
1093 | |
1094 | ++pipe->x; |
1095 | } |
1096 | |
1097 | // special case: |
1098 | // !pipe->pattern && !pipe->noTransparency && !state->softMask && |
1099 | // pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc && |
1100 | // !pipe->nonIsolatedGroup && |
1101 | // bitmap->mode == splashModeCMYK8 && pipe->destAlphaPtr |
1102 | void Splash::pipeRunAACMYK8(SplashPipe *pipe) |
1103 | { |
1104 | unsigned char aSrc, aDest, alpha2, aResult; |
1105 | SplashColor cDest; |
1106 | unsigned char cResult0, cResult1, cResult2, cResult3; |
1107 | |
1108 | //----- read destination pixel |
1109 | cDest[0] = pipe->destColorPtr[0]; |
1110 | cDest[1] = pipe->destColorPtr[1]; |
1111 | cDest[2] = pipe->destColorPtr[2]; |
1112 | cDest[3] = pipe->destColorPtr[3]; |
1113 | aDest = *pipe->destAlphaPtr; |
1114 | |
1115 | //----- source alpha |
1116 | aSrc = div255(x: pipe->aInput * pipe->shape); |
1117 | |
1118 | //----- result alpha and non-isolated group element correction |
1119 | aResult = aSrc + aDest - div255(x: aSrc * aDest); |
1120 | alpha2 = aResult; |
1121 | |
1122 | //----- result color |
1123 | if (alpha2 == 0) { |
1124 | cResult0 = 0; |
1125 | cResult1 = 0; |
1126 | cResult2 = 0; |
1127 | cResult3 = 0; |
1128 | } else { |
1129 | cResult0 = state->cmykTransferC[(unsigned char)(((alpha2 - aSrc) * cDest[0] + aSrc * pipe->cSrc[0]) / alpha2)]; |
1130 | cResult1 = state->cmykTransferM[(unsigned char)(((alpha2 - aSrc) * cDest[1] + aSrc * pipe->cSrc[1]) / alpha2)]; |
1131 | cResult2 = state->cmykTransferY[(unsigned char)(((alpha2 - aSrc) * cDest[2] + aSrc * pipe->cSrc[2]) / alpha2)]; |
1132 | cResult3 = state->cmykTransferK[(unsigned char)(((alpha2 - aSrc) * cDest[3] + aSrc * pipe->cSrc[3]) / alpha2)]; |
1133 | } |
1134 | |
1135 | //----- write destination pixel |
1136 | if (state->overprintMask & 1) { |
1137 | pipe->destColorPtr[0] = (state->overprintAdditive && pipe->shape != 0) ? std::min<int>(a: pipe->destColorPtr[0] + cResult0, b: 255) : cResult0; |
1138 | } |
1139 | if (state->overprintMask & 2) { |
1140 | pipe->destColorPtr[1] = (state->overprintAdditive && pipe->shape != 0) ? std::min<int>(a: pipe->destColorPtr[1] + cResult1, b: 255) : cResult1; |
1141 | } |
1142 | if (state->overprintMask & 4) { |
1143 | pipe->destColorPtr[2] = (state->overprintAdditive && pipe->shape != 0) ? std::min<int>(a: pipe->destColorPtr[2] + cResult2, b: 255) : cResult2; |
1144 | } |
1145 | if (state->overprintMask & 8) { |
1146 | pipe->destColorPtr[3] = (state->overprintAdditive && pipe->shape != 0) ? std::min<int>(a: pipe->destColorPtr[3] + cResult3, b: 255) : cResult3; |
1147 | } |
1148 | pipe->destColorPtr += 4; |
1149 | *pipe->destAlphaPtr++ = aResult; |
1150 | |
1151 | ++pipe->x; |
1152 | } |
1153 | |
1154 | // special case: |
1155 | // !pipe->pattern && !pipe->noTransparency && !state->softMask && |
1156 | // pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc && |
1157 | // !pipe->nonIsolatedGroup && |
1158 | // bitmap->mode == splashModeDeviceN8 && pipe->destAlphaPtr |
1159 | void Splash::pipeRunAADeviceN8(SplashPipe *pipe) |
1160 | { |
1161 | unsigned char aSrc, aDest, alpha2, aResult; |
1162 | SplashColor cDest; |
1163 | unsigned char cResult[SPOT_NCOMPS + 4]; |
1164 | int cp, mask; |
1165 | |
1166 | //----- read destination pixel |
1167 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
1168 | cDest[cp] = pipe->destColorPtr[cp]; |
1169 | } |
1170 | aDest = *pipe->destAlphaPtr; |
1171 | |
1172 | //----- source alpha |
1173 | aSrc = div255(x: pipe->aInput * pipe->shape); |
1174 | |
1175 | //----- result alpha and non-isolated group element correction |
1176 | aResult = aSrc + aDest - div255(x: aSrc * aDest); |
1177 | alpha2 = aResult; |
1178 | |
1179 | //----- result color |
1180 | if (alpha2 == 0) { |
1181 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
1182 | cResult[cp] = 0; |
1183 | } |
1184 | } else { |
1185 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
1186 | cResult[cp] = state->deviceNTransfer[cp][(unsigned char)(((alpha2 - aSrc) * cDest[cp] + aSrc * pipe->cSrc[cp]) / alpha2)]; |
1187 | } |
1188 | } |
1189 | |
1190 | //----- write destination pixel |
1191 | mask = 1; |
1192 | for (cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
1193 | if (state->overprintMask & mask) { |
1194 | pipe->destColorPtr[cp] = cResult[cp]; |
1195 | } |
1196 | mask <<= 1; |
1197 | } |
1198 | pipe->destColorPtr += (SPOT_NCOMPS + 4); |
1199 | *pipe->destAlphaPtr++ = aResult; |
1200 | |
1201 | ++pipe->x; |
1202 | } |
1203 | |
1204 | inline void Splash::pipeSetXY(SplashPipe *pipe, int x, int y) |
1205 | { |
1206 | pipe->x = x; |
1207 | pipe->y = y; |
1208 | if (state->softMask) { |
1209 | pipe->softMaskPtr = &state->softMask->data[y * state->softMask->rowSize + x]; |
1210 | } |
1211 | switch (bitmap->mode) { |
1212 | case splashModeMono1: |
1213 | pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + (x >> 3)]; |
1214 | pipe->destColorMask = 0x80 >> (x & 7); |
1215 | break; |
1216 | case splashModeMono8: |
1217 | pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + x]; |
1218 | break; |
1219 | case splashModeRGB8: |
1220 | case splashModeBGR8: |
1221 | pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + 3 * x]; |
1222 | break; |
1223 | case splashModeXBGR8: |
1224 | pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + 4 * x]; |
1225 | break; |
1226 | case splashModeCMYK8: |
1227 | pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + 4 * x]; |
1228 | break; |
1229 | case splashModeDeviceN8: |
1230 | pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + (SPOT_NCOMPS + 4) * x]; |
1231 | break; |
1232 | } |
1233 | if (bitmap->alpha) { |
1234 | pipe->destAlphaPtr = &bitmap->alpha[y * bitmap->width + x]; |
1235 | } else { |
1236 | pipe->destAlphaPtr = nullptr; |
1237 | } |
1238 | if (state->inNonIsolatedGroup && alpha0Bitmap->alpha) { |
1239 | pipe->alpha0Ptr = &alpha0Bitmap->alpha[(alpha0Y + y) * alpha0Bitmap->width + (alpha0X + x)]; |
1240 | } else { |
1241 | pipe->alpha0Ptr = nullptr; |
1242 | } |
1243 | } |
1244 | |
1245 | inline void Splash::pipeIncX(SplashPipe *pipe) |
1246 | { |
1247 | ++pipe->x; |
1248 | if (state->softMask) { |
1249 | ++pipe->softMaskPtr; |
1250 | } |
1251 | switch (bitmap->mode) { |
1252 | case splashModeMono1: |
1253 | if (!(pipe->destColorMask >>= 1)) { |
1254 | pipe->destColorMask = 0x80; |
1255 | ++pipe->destColorPtr; |
1256 | } |
1257 | break; |
1258 | case splashModeMono8: |
1259 | ++pipe->destColorPtr; |
1260 | break; |
1261 | case splashModeRGB8: |
1262 | case splashModeBGR8: |
1263 | pipe->destColorPtr += 3; |
1264 | break; |
1265 | case splashModeXBGR8: |
1266 | pipe->destColorPtr += 4; |
1267 | break; |
1268 | case splashModeCMYK8: |
1269 | pipe->destColorPtr += 4; |
1270 | break; |
1271 | case splashModeDeviceN8: |
1272 | pipe->destColorPtr += (SPOT_NCOMPS + 4); |
1273 | break; |
1274 | } |
1275 | if (pipe->destAlphaPtr) { |
1276 | ++pipe->destAlphaPtr; |
1277 | } |
1278 | if (pipe->alpha0Ptr) { |
1279 | ++pipe->alpha0Ptr; |
1280 | } |
1281 | } |
1282 | |
1283 | inline void Splash::drawPixel(SplashPipe *pipe, int x, int y, bool noClip) |
1284 | { |
1285 | if (unlikely(y < 0)) { |
1286 | return; |
1287 | } |
1288 | |
1289 | if (noClip || state->clip->test(x, y)) { |
1290 | pipeSetXY(pipe, x, y); |
1291 | (this->*pipe->run)(pipe); |
1292 | } |
1293 | } |
1294 | |
1295 | inline void Splash::drawAAPixelInit() |
1296 | { |
1297 | aaBufY = -1; |
1298 | } |
1299 | |
1300 | inline void Splash::drawAAPixel(SplashPipe *pipe, int x, int y) |
1301 | { |
1302 | #if splashAASize == 4 |
1303 | static const int bitCount4[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 }; |
1304 | int w; |
1305 | #else |
1306 | int xx, yy; |
1307 | #endif |
1308 | SplashColorPtr p; |
1309 | int x0, x1, t; |
1310 | |
1311 | if (x < 0 || x >= bitmap->width || y < state->clip->getYMinI() || y > state->clip->getYMaxI()) { |
1312 | return; |
1313 | } |
1314 | |
1315 | // update aaBuf |
1316 | if (y != aaBufY) { |
1317 | memset(s: aaBuf->getDataPtr(), c: 0xff, n: aaBuf->getRowSize() * aaBuf->getHeight()); |
1318 | x0 = 0; |
1319 | x1 = bitmap->width - 1; |
1320 | state->clip->clipAALine(aaBuf, x0: &x0, x1: &x1, y); |
1321 | aaBufY = y; |
1322 | } |
1323 | |
1324 | // compute the shape value |
1325 | #if splashAASize == 4 |
1326 | p = aaBuf->getDataPtr() + (x >> 1); |
1327 | w = aaBuf->getRowSize(); |
1328 | if (x & 1) { |
1329 | t = bitCount4[*p & 0x0f] + bitCount4[p[w] & 0x0f] + bitCount4[p[2 * w] & 0x0f] + bitCount4[p[3 * w] & 0x0f]; |
1330 | } else { |
1331 | t = bitCount4[*p >> 4] + bitCount4[p[w] >> 4] + bitCount4[p[2 * w] >> 4] + bitCount4[p[3 * w] >> 4]; |
1332 | } |
1333 | #else |
1334 | t = 0; |
1335 | for (yy = 0; yy < splashAASize; ++yy) { |
1336 | for (xx = 0; xx < splashAASize; ++xx) { |
1337 | p = aaBuf->getDataPtr() + yy * aaBuf->getRowSize() + ((x * splashAASize + xx) >> 3); |
1338 | t += (*p >> (7 - ((x * splashAASize + xx) & 7))) & 1; |
1339 | } |
1340 | } |
1341 | #endif |
1342 | |
1343 | // draw the pixel |
1344 | if (t != 0) { |
1345 | pipeSetXY(pipe, x, y); |
1346 | pipe->shape = div255(x: static_cast<int>(aaGamma[t] * pipe->shape)); |
1347 | (this->*pipe->run)(pipe); |
1348 | } |
1349 | } |
1350 | |
1351 | inline void Splash::drawSpan(SplashPipe *pipe, int x0, int x1, int y, bool noClip) |
1352 | { |
1353 | int x; |
1354 | |
1355 | if (noClip) { |
1356 | pipeSetXY(pipe, x: x0, y); |
1357 | for (x = x0; x <= x1; ++x) { |
1358 | (this->*pipe->run)(pipe); |
1359 | } |
1360 | } else { |
1361 | if (x0 < state->clip->getXMinI()) { |
1362 | x0 = state->clip->getXMinI(); |
1363 | } |
1364 | if (x1 > state->clip->getXMaxI()) { |
1365 | x1 = state->clip->getXMaxI(); |
1366 | } |
1367 | pipeSetXY(pipe, x: x0, y); |
1368 | for (x = x0; x <= x1; ++x) { |
1369 | if (state->clip->test(x, y)) { |
1370 | (this->*pipe->run)(pipe); |
1371 | } else { |
1372 | pipeIncX(pipe); |
1373 | } |
1374 | } |
1375 | } |
1376 | } |
1377 | |
1378 | inline void Splash::drawAALine(SplashPipe *pipe, int x0, int x1, int y, bool adjustLine, unsigned char lineOpacity) |
1379 | { |
1380 | #if splashAASize == 4 |
1381 | static const int bitCount4[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 }; |
1382 | SplashColorPtr p0, p1, p2, p3; |
1383 | int t; |
1384 | #else |
1385 | SplashColorPtr p; |
1386 | int xx, yy, t; |
1387 | #endif |
1388 | int x; |
1389 | |
1390 | #if splashAASize == 4 |
1391 | p0 = aaBuf->getDataPtr() + (x0 >> 1); |
1392 | p1 = p0 + aaBuf->getRowSize(); |
1393 | p2 = p1 + aaBuf->getRowSize(); |
1394 | p3 = p2 + aaBuf->getRowSize(); |
1395 | #endif |
1396 | pipeSetXY(pipe, x: x0, y); |
1397 | for (x = x0; x <= x1; ++x) { |
1398 | |
1399 | // compute the shape value |
1400 | #if splashAASize == 4 |
1401 | if (x & 1) { |
1402 | t = bitCount4[*p0 & 0x0f] + bitCount4[*p1 & 0x0f] + bitCount4[*p2 & 0x0f] + bitCount4[*p3 & 0x0f]; |
1403 | ++p0; |
1404 | ++p1; |
1405 | ++p2; |
1406 | ++p3; |
1407 | } else { |
1408 | t = bitCount4[*p0 >> 4] + bitCount4[*p1 >> 4] + bitCount4[*p2 >> 4] + bitCount4[*p3 >> 4]; |
1409 | } |
1410 | #else |
1411 | t = 0; |
1412 | for (yy = 0; yy < splashAASize; ++yy) { |
1413 | for (xx = 0; xx < splashAASize; ++xx) { |
1414 | p = aaBuf->getDataPtr() + yy * aaBuf->getRowSize() + ((x * splashAASize + xx) >> 3); |
1415 | t += (*p >> (7 - ((x * splashAASize + xx) & 7))) & 1; |
1416 | } |
1417 | } |
1418 | #endif |
1419 | |
1420 | if (t != 0) { |
1421 | pipe->shape = (adjustLine) ? div255(x: static_cast<int>((int)lineOpacity * (double)aaGamma[t])) : (int)aaGamma[t]; |
1422 | (this->*pipe->run)(pipe); |
1423 | } else { |
1424 | pipeIncX(pipe); |
1425 | } |
1426 | } |
1427 | } |
1428 | |
1429 | //------------------------------------------------------------------------ |
1430 | |
1431 | // Transform a point from user space to device space. |
1432 | inline void Splash::transform(const SplashCoord *matrix, SplashCoord xi, SplashCoord yi, SplashCoord *xo, SplashCoord *yo) |
1433 | { |
1434 | // [ m[0] m[1] 0 ] |
1435 | // [xo yo 1] = [xi yi 1] * [ m[2] m[3] 0 ] |
1436 | // [ m[4] m[5] 1 ] |
1437 | *xo = xi * matrix[0] + yi * matrix[2] + matrix[4]; |
1438 | *yo = xi * matrix[1] + yi * matrix[3] + matrix[5]; |
1439 | } |
1440 | |
1441 | //------------------------------------------------------------------------ |
1442 | // Splash |
1443 | //------------------------------------------------------------------------ |
1444 | |
1445 | Splash::Splash(SplashBitmap *bitmapA, bool vectorAntialiasA, SplashScreenParams *screenParams) |
1446 | { |
1447 | int i; |
1448 | |
1449 | bitmap = bitmapA; |
1450 | vectorAntialias = vectorAntialiasA; |
1451 | inShading = false; |
1452 | state = new SplashState(bitmap->width, bitmap->height, vectorAntialias, screenParams); |
1453 | if (vectorAntialias) { |
1454 | aaBuf = new SplashBitmap(splashAASize * bitmap->width, splashAASize, 1, splashModeMono1, false); |
1455 | for (i = 0; i <= splashAASize * splashAASize; ++i) { |
1456 | aaGamma[i] = (unsigned char)splashRound(x: splashPow(x: (SplashCoord)i / (SplashCoord)(splashAASize * splashAASize), splashAAGamma) * 255); |
1457 | } |
1458 | } else { |
1459 | aaBuf = nullptr; |
1460 | } |
1461 | minLineWidth = 0; |
1462 | thinLineMode = splashThinLineDefault; |
1463 | debugMode = false; |
1464 | alpha0Bitmap = nullptr; |
1465 | } |
1466 | |
1467 | Splash::Splash(SplashBitmap *bitmapA, bool vectorAntialiasA, SplashScreen *screenA) |
1468 | { |
1469 | int i; |
1470 | |
1471 | bitmap = bitmapA; |
1472 | inShading = false; |
1473 | vectorAntialias = vectorAntialiasA; |
1474 | state = new SplashState(bitmap->width, bitmap->height, vectorAntialias, screenA); |
1475 | if (vectorAntialias) { |
1476 | aaBuf = new SplashBitmap(splashAASize * bitmap->width, splashAASize, 1, splashModeMono1, false); |
1477 | for (i = 0; i <= splashAASize * splashAASize; ++i) { |
1478 | aaGamma[i] = (unsigned char)splashRound(x: splashPow(x: (SplashCoord)i / (SplashCoord)(splashAASize * splashAASize), splashAAGamma) * 255); |
1479 | } |
1480 | } else { |
1481 | aaBuf = nullptr; |
1482 | } |
1483 | minLineWidth = 0; |
1484 | thinLineMode = splashThinLineDefault; |
1485 | debugMode = false; |
1486 | alpha0Bitmap = nullptr; |
1487 | } |
1488 | |
1489 | Splash::~Splash() |
1490 | { |
1491 | while (state->next) { |
1492 | restoreState(); |
1493 | } |
1494 | delete state; |
1495 | delete aaBuf; |
1496 | } |
1497 | |
1498 | //------------------------------------------------------------------------ |
1499 | // state read |
1500 | //------------------------------------------------------------------------ |
1501 | |
1502 | SplashCoord *Splash::getMatrix() |
1503 | { |
1504 | return state->matrix; |
1505 | } |
1506 | |
1507 | SplashPattern *Splash::getStrokePattern() |
1508 | { |
1509 | return state->strokePattern; |
1510 | } |
1511 | |
1512 | SplashPattern *Splash::getFillPattern() |
1513 | { |
1514 | return state->fillPattern; |
1515 | } |
1516 | |
1517 | SplashScreen *Splash::getScreen() |
1518 | { |
1519 | return state->screen; |
1520 | } |
1521 | |
1522 | SplashBlendFunc Splash::getBlendFunc() |
1523 | { |
1524 | return state->blendFunc; |
1525 | } |
1526 | |
1527 | SplashCoord Splash::getStrokeAlpha() |
1528 | { |
1529 | return state->strokeAlpha; |
1530 | } |
1531 | |
1532 | SplashCoord Splash::getFillAlpha() |
1533 | { |
1534 | return state->fillAlpha; |
1535 | } |
1536 | |
1537 | SplashCoord Splash::getLineWidth() |
1538 | { |
1539 | return state->lineWidth; |
1540 | } |
1541 | |
1542 | int Splash::getLineCap() |
1543 | { |
1544 | return state->lineCap; |
1545 | } |
1546 | |
1547 | int Splash::getLineJoin() |
1548 | { |
1549 | return state->lineJoin; |
1550 | } |
1551 | |
1552 | SplashCoord Splash::getMiterLimit() |
1553 | { |
1554 | return state->miterLimit; |
1555 | } |
1556 | |
1557 | SplashCoord Splash::getFlatness() |
1558 | { |
1559 | return state->flatness; |
1560 | } |
1561 | |
1562 | SplashCoord Splash::getLineDashPhase() |
1563 | { |
1564 | return state->lineDashPhase; |
1565 | } |
1566 | |
1567 | bool Splash::getStrokeAdjust() |
1568 | { |
1569 | return state->strokeAdjust; |
1570 | } |
1571 | |
1572 | SplashClip *Splash::getClip() |
1573 | { |
1574 | return state->clip; |
1575 | } |
1576 | |
1577 | SplashBitmap *Splash::getSoftMask() |
1578 | { |
1579 | return state->softMask; |
1580 | } |
1581 | |
1582 | bool Splash::getInNonIsolatedGroup() |
1583 | { |
1584 | return state->inNonIsolatedGroup; |
1585 | } |
1586 | |
1587 | //------------------------------------------------------------------------ |
1588 | // state write |
1589 | //------------------------------------------------------------------------ |
1590 | |
1591 | void Splash::setMatrix(SplashCoord *matrix) |
1592 | { |
1593 | memcpy(dest: state->matrix, src: matrix, n: 6 * sizeof(SplashCoord)); |
1594 | } |
1595 | |
1596 | void Splash::setStrokePattern(SplashPattern *strokePattern) |
1597 | { |
1598 | state->setStrokePattern(strokePattern); |
1599 | } |
1600 | |
1601 | void Splash::setFillPattern(SplashPattern *fillPattern) |
1602 | { |
1603 | state->setFillPattern(fillPattern); |
1604 | } |
1605 | |
1606 | void Splash::setScreen(SplashScreen *screen) |
1607 | { |
1608 | state->setScreen(screen); |
1609 | } |
1610 | |
1611 | void Splash::setBlendFunc(SplashBlendFunc func) |
1612 | { |
1613 | state->blendFunc = func; |
1614 | } |
1615 | |
1616 | void Splash::setStrokeAlpha(SplashCoord alpha) |
1617 | { |
1618 | state->strokeAlpha = (state->multiplyPatternAlpha) ? alpha * state->patternStrokeAlpha : alpha; |
1619 | } |
1620 | |
1621 | void Splash::setFillAlpha(SplashCoord alpha) |
1622 | { |
1623 | state->fillAlpha = (state->multiplyPatternAlpha) ? alpha * state->patternFillAlpha : alpha; |
1624 | } |
1625 | |
1626 | void Splash::setPatternAlpha(SplashCoord strokeAlpha, SplashCoord fillAlpha) |
1627 | { |
1628 | state->patternStrokeAlpha = strokeAlpha; |
1629 | state->patternFillAlpha = fillAlpha; |
1630 | state->multiplyPatternAlpha = true; |
1631 | } |
1632 | |
1633 | void Splash::clearPatternAlpha() |
1634 | { |
1635 | state->patternStrokeAlpha = 1; |
1636 | state->patternFillAlpha = 1; |
1637 | state->multiplyPatternAlpha = false; |
1638 | } |
1639 | |
1640 | void Splash::setFillOverprint(bool fop) |
1641 | { |
1642 | state->fillOverprint = fop; |
1643 | } |
1644 | |
1645 | void Splash::setStrokeOverprint(bool sop) |
1646 | { |
1647 | state->strokeOverprint = sop; |
1648 | } |
1649 | |
1650 | void Splash::setOverprintMode(int opm) |
1651 | { |
1652 | state->overprintMode = opm; |
1653 | } |
1654 | |
1655 | void Splash::setLineWidth(SplashCoord lineWidth) |
1656 | { |
1657 | state->lineWidth = lineWidth; |
1658 | } |
1659 | |
1660 | void Splash::setLineCap(int lineCap) |
1661 | { |
1662 | state->lineCap = lineCap; |
1663 | } |
1664 | |
1665 | void Splash::setLineJoin(int lineJoin) |
1666 | { |
1667 | state->lineJoin = lineJoin; |
1668 | } |
1669 | |
1670 | void Splash::setMiterLimit(SplashCoord miterLimit) |
1671 | { |
1672 | state->miterLimit = miterLimit; |
1673 | } |
1674 | |
1675 | void Splash::setFlatness(SplashCoord flatness) |
1676 | { |
1677 | if (flatness < 1) { |
1678 | state->flatness = 1; |
1679 | } else { |
1680 | state->flatness = flatness; |
1681 | } |
1682 | } |
1683 | |
1684 | void Splash::setLineDash(std::vector<SplashCoord> &&lineDash, SplashCoord lineDashPhase) |
1685 | { |
1686 | state->setLineDash(lineDashA: std::move(lineDash), lineDashPhaseA: lineDashPhase); |
1687 | } |
1688 | |
1689 | void Splash::setStrokeAdjust(bool strokeAdjust) |
1690 | { |
1691 | state->strokeAdjust = strokeAdjust; |
1692 | } |
1693 | |
1694 | void Splash::clipResetToRect(SplashCoord x0, SplashCoord y0, SplashCoord x1, SplashCoord y1) |
1695 | { |
1696 | state->clip->resetToRect(x0, y0, x1, y1); |
1697 | } |
1698 | |
1699 | SplashError Splash::clipToRect(SplashCoord x0, SplashCoord y0, SplashCoord x1, SplashCoord y1) |
1700 | { |
1701 | return state->clip->clipToRect(x0, y0, x1, y1); |
1702 | } |
1703 | |
1704 | SplashError Splash::clipToPath(SplashPath *path, bool eo) |
1705 | { |
1706 | return state->clip->clipToPath(path, matrix: state->matrix, flatness: state->flatness, eo); |
1707 | } |
1708 | |
1709 | void Splash::setSoftMask(SplashBitmap *softMask) |
1710 | { |
1711 | state->setSoftMask(softMask); |
1712 | } |
1713 | |
1714 | void Splash::setInNonIsolatedGroup(SplashBitmap *alpha0BitmapA, int alpha0XA, int alpha0YA) |
1715 | { |
1716 | alpha0Bitmap = alpha0BitmapA; |
1717 | alpha0X = alpha0XA; |
1718 | alpha0Y = alpha0YA; |
1719 | state->inNonIsolatedGroup = true; |
1720 | } |
1721 | |
1722 | void Splash::setTransfer(unsigned char *red, unsigned char *green, unsigned char *blue, unsigned char *gray) |
1723 | { |
1724 | state->setTransfer(red, green, blue, gray); |
1725 | } |
1726 | |
1727 | void Splash::setOverprintMask(unsigned int overprintMask, bool additive) |
1728 | { |
1729 | state->overprintMask = overprintMask; |
1730 | state->overprintAdditive = additive; |
1731 | } |
1732 | |
1733 | //------------------------------------------------------------------------ |
1734 | // state save/restore |
1735 | //------------------------------------------------------------------------ |
1736 | |
1737 | void Splash::saveState() |
1738 | { |
1739 | SplashState *newState; |
1740 | |
1741 | newState = state->copy(); |
1742 | newState->next = state; |
1743 | state = newState; |
1744 | } |
1745 | |
1746 | SplashError Splash::restoreState() |
1747 | { |
1748 | SplashState *oldState; |
1749 | |
1750 | if (!state->next) { |
1751 | return splashErrNoSave; |
1752 | } |
1753 | oldState = state; |
1754 | state = state->next; |
1755 | delete oldState; |
1756 | return splashOk; |
1757 | } |
1758 | |
1759 | //------------------------------------------------------------------------ |
1760 | // drawing operations |
1761 | //------------------------------------------------------------------------ |
1762 | |
1763 | void Splash::clear(SplashColorPtr color, unsigned char alpha) |
1764 | { |
1765 | SplashColorPtr row, p; |
1766 | unsigned char mono; |
1767 | int x, y; |
1768 | |
1769 | switch (bitmap->mode) { |
1770 | case splashModeMono1: |
1771 | mono = (color[0] & 0x80) ? 0xff : 0x00; |
1772 | if (bitmap->rowSize < 0) { |
1773 | memset(s: bitmap->data + bitmap->rowSize * (bitmap->height - 1), c: mono, n: -bitmap->rowSize * bitmap->height); |
1774 | } else { |
1775 | memset(s: bitmap->data, c: mono, n: bitmap->rowSize * bitmap->height); |
1776 | } |
1777 | break; |
1778 | case splashModeMono8: |
1779 | if (bitmap->rowSize < 0) { |
1780 | memset(s: bitmap->data + bitmap->rowSize * (bitmap->height - 1), c: color[0], n: -bitmap->rowSize * bitmap->height); |
1781 | } else { |
1782 | memset(s: bitmap->data, c: color[0], n: bitmap->rowSize * bitmap->height); |
1783 | } |
1784 | break; |
1785 | case splashModeRGB8: |
1786 | if (color[0] == color[1] && color[1] == color[2]) { |
1787 | if (bitmap->rowSize < 0) { |
1788 | memset(s: bitmap->data + bitmap->rowSize * (bitmap->height - 1), c: color[0], n: -bitmap->rowSize * bitmap->height); |
1789 | } else { |
1790 | memset(s: bitmap->data, c: color[0], n: bitmap->rowSize * bitmap->height); |
1791 | } |
1792 | } else { |
1793 | row = bitmap->data; |
1794 | for (y = 0; y < bitmap->height; ++y) { |
1795 | p = row; |
1796 | for (x = 0; x < bitmap->width; ++x) { |
1797 | *p++ = color[2]; |
1798 | *p++ = color[1]; |
1799 | *p++ = color[0]; |
1800 | } |
1801 | row += bitmap->rowSize; |
1802 | } |
1803 | } |
1804 | break; |
1805 | case splashModeXBGR8: |
1806 | if (color[0] == color[1] && color[1] == color[2]) { |
1807 | if (bitmap->rowSize < 0) { |
1808 | memset(s: bitmap->data + bitmap->rowSize * (bitmap->height - 1), c: color[0], n: -bitmap->rowSize * bitmap->height); |
1809 | } else { |
1810 | memset(s: bitmap->data, c: color[0], n: bitmap->rowSize * bitmap->height); |
1811 | } |
1812 | } else { |
1813 | row = bitmap->data; |
1814 | for (y = 0; y < bitmap->height; ++y) { |
1815 | p = row; |
1816 | for (x = 0; x < bitmap->width; ++x) { |
1817 | *p++ = color[0]; |
1818 | *p++ = color[1]; |
1819 | *p++ = color[2]; |
1820 | *p++ = 255; |
1821 | } |
1822 | row += bitmap->rowSize; |
1823 | } |
1824 | } |
1825 | break; |
1826 | case splashModeBGR8: |
1827 | if (color[0] == color[1] && color[1] == color[2]) { |
1828 | if (bitmap->rowSize < 0) { |
1829 | memset(s: bitmap->data + bitmap->rowSize * (bitmap->height - 1), c: color[0], n: -bitmap->rowSize * bitmap->height); |
1830 | } else { |
1831 | memset(s: bitmap->data, c: color[0], n: bitmap->rowSize * bitmap->height); |
1832 | } |
1833 | } else { |
1834 | row = bitmap->data; |
1835 | for (y = 0; y < bitmap->height; ++y) { |
1836 | p = row; |
1837 | for (x = 0; x < bitmap->width; ++x) { |
1838 | *p++ = color[0]; |
1839 | *p++ = color[1]; |
1840 | *p++ = color[2]; |
1841 | } |
1842 | row += bitmap->rowSize; |
1843 | } |
1844 | } |
1845 | break; |
1846 | case splashModeCMYK8: |
1847 | if (color[0] == color[1] && color[1] == color[2] && color[2] == color[3]) { |
1848 | if (bitmap->rowSize < 0) { |
1849 | memset(s: bitmap->data + bitmap->rowSize * (bitmap->height - 1), c: color[0], n: -bitmap->rowSize * bitmap->height); |
1850 | } else { |
1851 | memset(s: bitmap->data, c: color[0], n: bitmap->rowSize * bitmap->height); |
1852 | } |
1853 | } else { |
1854 | row = bitmap->data; |
1855 | for (y = 0; y < bitmap->height; ++y) { |
1856 | p = row; |
1857 | for (x = 0; x < bitmap->width; ++x) { |
1858 | *p++ = color[0]; |
1859 | *p++ = color[1]; |
1860 | *p++ = color[2]; |
1861 | *p++ = color[3]; |
1862 | } |
1863 | row += bitmap->rowSize; |
1864 | } |
1865 | } |
1866 | break; |
1867 | case splashModeDeviceN8: |
1868 | row = bitmap->data; |
1869 | for (y = 0; y < bitmap->height; ++y) { |
1870 | p = row; |
1871 | for (x = 0; x < bitmap->width; ++x) { |
1872 | for (int cp = 0; cp < SPOT_NCOMPS + 4; cp++) { |
1873 | *p++ = color[cp]; |
1874 | } |
1875 | } |
1876 | row += bitmap->rowSize; |
1877 | } |
1878 | break; |
1879 | } |
1880 | |
1881 | if (bitmap->alpha) { |
1882 | memset(s: bitmap->alpha, c: alpha, n: bitmap->width * bitmap->height); |
1883 | } |
1884 | } |
1885 | |
1886 | SplashError Splash::stroke(SplashPath *path) |
1887 | { |
1888 | SplashPath *path2, *dPath; |
1889 | SplashCoord d1, d2, t1, t2, w; |
1890 | |
1891 | if (debugMode) { |
1892 | printf(format: "stroke [dash:%zu] [width:%.2f]:\n" , state->lineDash.size(), (double)state->lineWidth); |
1893 | dumpPath(path); |
1894 | } |
1895 | opClipRes = splashClipAllOutside; |
1896 | if (path->length == 0) { |
1897 | return splashErrEmptyPath; |
1898 | } |
1899 | path2 = flattenPath(path, matrix: state->matrix, flatness: state->flatness); |
1900 | if (!state->lineDash.empty()) { |
1901 | dPath = makeDashedPath(xPath: path2); |
1902 | delete path2; |
1903 | path2 = dPath; |
1904 | if (path2->length == 0) { |
1905 | delete path2; |
1906 | return splashErrEmptyPath; |
1907 | } |
1908 | } |
1909 | |
1910 | // transform a unit square, and take the half the max of the two |
1911 | // diagonals; the product of this number and the line width is the |
1912 | // (approximate) transformed line width |
1913 | t1 = state->matrix[0] + state->matrix[2]; |
1914 | t2 = state->matrix[1] + state->matrix[3]; |
1915 | d1 = t1 * t1 + t2 * t2; |
1916 | t1 = state->matrix[0] - state->matrix[2]; |
1917 | t2 = state->matrix[1] - state->matrix[3]; |
1918 | d2 = t1 * t1 + t2 * t2; |
1919 | if (d2 > d1) { |
1920 | d1 = d2; |
1921 | } |
1922 | d1 *= 0.5; |
1923 | if (d1 > 0 && d1 * state->lineWidth * state->lineWidth < minLineWidth * minLineWidth) { |
1924 | w = minLineWidth / splashSqrt(x: d1); |
1925 | strokeWide(path: path2, w); |
1926 | } else if (bitmap->mode == splashModeMono1) { |
1927 | // this gets close to Adobe's behavior in mono mode |
1928 | if (d1 * state->lineWidth <= 2) { |
1929 | strokeNarrow(path: path2); |
1930 | } else { |
1931 | strokeWide(path: path2, w: state->lineWidth); |
1932 | } |
1933 | } else { |
1934 | if (state->lineWidth == 0) { |
1935 | strokeNarrow(path: path2); |
1936 | } else { |
1937 | strokeWide(path: path2, w: state->lineWidth); |
1938 | } |
1939 | } |
1940 | |
1941 | delete path2; |
1942 | return splashOk; |
1943 | } |
1944 | |
1945 | void Splash::strokeNarrow(SplashPath *path) |
1946 | { |
1947 | SplashPipe pipe; |
1948 | SplashXPathSeg *seg; |
1949 | int x0, x1, y0, y1, xa, xb, y; |
1950 | SplashCoord dxdy; |
1951 | SplashClipResult clipRes; |
1952 | int nClipRes[3]; |
1953 | int i; |
1954 | |
1955 | nClipRes[0] = nClipRes[1] = nClipRes[2] = 0; |
1956 | |
1957 | SplashXPath xPath(path, state->matrix, state->flatness, false); |
1958 | |
1959 | pipeInit(pipe: &pipe, x: 0, y: 0, pattern: state->strokePattern, cSrc: nullptr, aInput: (unsigned char)splashRound(x: state->strokeAlpha * 255), usesShape: false, nonIsolatedGroup: false); |
1960 | |
1961 | for (i = 0, seg = xPath.segs; i < xPath.length; ++i, ++seg) { |
1962 | if (seg->y0 <= seg->y1) { |
1963 | y0 = splashFloor(x: seg->y0); |
1964 | y1 = splashFloor(x: seg->y1); |
1965 | x0 = splashFloor(x: seg->x0); |
1966 | x1 = splashFloor(x: seg->x1); |
1967 | } else { |
1968 | y0 = splashFloor(x: seg->y1); |
1969 | y1 = splashFloor(x: seg->y0); |
1970 | x0 = splashFloor(x: seg->x1); |
1971 | x1 = splashFloor(x: seg->x0); |
1972 | } |
1973 | if ((clipRes = state->clip->testRect(rectXMin: x0 <= x1 ? x0 : x1, rectYMin: y0, rectXMax: x0 <= x1 ? x1 : x0, rectYMax: y1)) != splashClipAllOutside) { |
1974 | if (y0 == y1) { |
1975 | if (x0 <= x1) { |
1976 | drawSpan(pipe: &pipe, x0, x1, y: y0, noClip: clipRes == splashClipAllInside); |
1977 | } else { |
1978 | drawSpan(pipe: &pipe, x0: x1, x1: x0, y: y0, noClip: clipRes == splashClipAllInside); |
1979 | } |
1980 | } else { |
1981 | dxdy = seg->dxdy; |
1982 | if (y0 < state->clip->getYMinI()) { |
1983 | y0 = state->clip->getYMinI(); |
1984 | x0 = splashFloor(x: seg->x0 + (state->clip->getYMin() - seg->y0) * dxdy); |
1985 | } |
1986 | if (y1 > state->clip->getYMaxI()) { |
1987 | y1 = state->clip->getYMaxI(); |
1988 | x1 = splashFloor(x: seg->x0 + (state->clip->getYMax() - seg->y0) * dxdy); |
1989 | } |
1990 | if (x0 <= x1) { |
1991 | xa = x0; |
1992 | for (y = y0; y <= y1; ++y) { |
1993 | if (y < y1) { |
1994 | xb = splashFloor(x: seg->x0 + ((SplashCoord)y + 1 - seg->y0) * dxdy); |
1995 | } else { |
1996 | xb = x1 + 1; |
1997 | } |
1998 | if (xa == xb) { |
1999 | drawPixel(pipe: &pipe, x: xa, y, noClip: clipRes == splashClipAllInside); |
2000 | } else { |
2001 | drawSpan(pipe: &pipe, x0: xa, x1: xb - 1, y, noClip: clipRes == splashClipAllInside); |
2002 | } |
2003 | xa = xb; |
2004 | } |
2005 | } else { |
2006 | xa = x0; |
2007 | for (y = y0; y <= y1; ++y) { |
2008 | if (y < y1) { |
2009 | xb = splashFloor(x: seg->x0 + ((SplashCoord)y + 1 - seg->y0) * dxdy); |
2010 | } else { |
2011 | xb = x1 - 1; |
2012 | } |
2013 | if (xa == xb) { |
2014 | drawPixel(pipe: &pipe, x: xa, y, noClip: clipRes == splashClipAllInside); |
2015 | } else { |
2016 | drawSpan(pipe: &pipe, x0: xb + 1, x1: xa, y, noClip: clipRes == splashClipAllInside); |
2017 | } |
2018 | xa = xb; |
2019 | } |
2020 | } |
2021 | } |
2022 | } |
2023 | ++nClipRes[clipRes]; |
2024 | } |
2025 | if (nClipRes[splashClipPartial] || (nClipRes[splashClipAllInside] && nClipRes[splashClipAllOutside])) { |
2026 | opClipRes = splashClipPartial; |
2027 | } else if (nClipRes[splashClipAllInside]) { |
2028 | opClipRes = splashClipAllInside; |
2029 | } else { |
2030 | opClipRes = splashClipAllOutside; |
2031 | } |
2032 | } |
2033 | |
2034 | void Splash::strokeWide(SplashPath *path, SplashCoord w) |
2035 | { |
2036 | SplashPath *path2; |
2037 | |
2038 | path2 = makeStrokePath(path, w, flatten: false); |
2039 | fillWithPattern(path: path2, eo: false, pattern: state->strokePattern, alpha: state->strokeAlpha); |
2040 | delete path2; |
2041 | } |
2042 | |
2043 | SplashPath *Splash::flattenPath(SplashPath *path, SplashCoord *matrix, SplashCoord flatness) |
2044 | { |
2045 | SplashPath *fPath; |
2046 | SplashCoord flatness2; |
2047 | unsigned char flag; |
2048 | int i; |
2049 | |
2050 | fPath = new SplashPath(); |
2051 | flatness2 = flatness * flatness; |
2052 | i = 0; |
2053 | while (i < path->length) { |
2054 | flag = path->flags[i]; |
2055 | if (flag & splashPathFirst) { |
2056 | fPath->moveTo(x: path->pts[i].x, y: path->pts[i].y); |
2057 | ++i; |
2058 | } else { |
2059 | if (flag & splashPathCurve) { |
2060 | flattenCurve(x0: path->pts[i - 1].x, y0: path->pts[i - 1].y, x1: path->pts[i].x, y1: path->pts[i].y, x2: path->pts[i + 1].x, y2: path->pts[i + 1].y, x3: path->pts[i + 2].x, y3: path->pts[i + 2].y, matrix, flatness2, fPath); |
2061 | i += 3; |
2062 | } else { |
2063 | fPath->lineTo(x: path->pts[i].x, y: path->pts[i].y); |
2064 | ++i; |
2065 | } |
2066 | if (path->flags[i - 1] & splashPathClosed) { |
2067 | fPath->close(); |
2068 | } |
2069 | } |
2070 | } |
2071 | return fPath; |
2072 | } |
2073 | |
2074 | void Splash::flattenCurve(SplashCoord x0, SplashCoord y0, SplashCoord x1, SplashCoord y1, SplashCoord x2, SplashCoord y2, SplashCoord x3, SplashCoord y3, SplashCoord *matrix, SplashCoord flatness2, SplashPath *fPath) |
2075 | { |
2076 | SplashCoord cx[splashMaxCurveSplits + 1][3]; |
2077 | SplashCoord cy[splashMaxCurveSplits + 1][3]; |
2078 | int cNext[splashMaxCurveSplits + 1]; |
2079 | SplashCoord xl0, xl1, xl2, xr0, xr1, xr2, xr3, xx1, xx2, xh; |
2080 | SplashCoord yl0, yl1, yl2, yr0, yr1, yr2, yr3, yy1, yy2, yh; |
2081 | SplashCoord dx, dy, mx, my, tx, ty, d1, d2; |
2082 | int p1, p2, p3; |
2083 | |
2084 | // initial segment |
2085 | p1 = 0; |
2086 | p2 = splashMaxCurveSplits; |
2087 | cx[p1][0] = x0; |
2088 | cy[p1][0] = y0; |
2089 | cx[p1][1] = x1; |
2090 | cy[p1][1] = y1; |
2091 | cx[p1][2] = x2; |
2092 | cy[p1][2] = y2; |
2093 | cx[p2][0] = x3; |
2094 | cy[p2][0] = y3; |
2095 | cNext[p1] = p2; |
2096 | |
2097 | while (p1 < splashMaxCurveSplits) { |
2098 | |
2099 | // get the next segment |
2100 | xl0 = cx[p1][0]; |
2101 | yl0 = cy[p1][0]; |
2102 | xx1 = cx[p1][1]; |
2103 | yy1 = cy[p1][1]; |
2104 | xx2 = cx[p1][2]; |
2105 | yy2 = cy[p1][2]; |
2106 | p2 = cNext[p1]; |
2107 | xr3 = cx[p2][0]; |
2108 | yr3 = cy[p2][0]; |
2109 | |
2110 | // compute the distances (in device space) from the control points |
2111 | // to the midpoint of the straight line (this is a bit of a hack, |
2112 | // but it's much faster than computing the actual distances to the |
2113 | // line) |
2114 | transform(matrix, xi: (xl0 + xr3) * 0.5, yi: (yl0 + yr3) * 0.5, xo: &mx, yo: &my); |
2115 | transform(matrix, xi: xx1, yi: yy1, xo: &tx, yo: &ty); |
2116 | dx = tx - mx; |
2117 | dy = ty - my; |
2118 | d1 = dx * dx + dy * dy; |
2119 | transform(matrix, xi: xx2, yi: yy2, xo: &tx, yo: &ty); |
2120 | dx = tx - mx; |
2121 | dy = ty - my; |
2122 | d2 = dx * dx + dy * dy; |
2123 | |
2124 | // if the curve is flat enough, or no more subdivisions are |
2125 | // allowed, add the straight line segment |
2126 | if (p2 - p1 == 1 || (d1 <= flatness2 && d2 <= flatness2)) { |
2127 | fPath->lineTo(x: xr3, y: yr3); |
2128 | p1 = p2; |
2129 | |
2130 | // otherwise, subdivide the curve |
2131 | } else { |
2132 | xl1 = splashAvg(x: xl0, y: xx1); |
2133 | yl1 = splashAvg(x: yl0, y: yy1); |
2134 | xh = splashAvg(x: xx1, y: xx2); |
2135 | yh = splashAvg(x: yy1, y: yy2); |
2136 | xl2 = splashAvg(x: xl1, y: xh); |
2137 | yl2 = splashAvg(x: yl1, y: yh); |
2138 | xr2 = splashAvg(x: xx2, y: xr3); |
2139 | yr2 = splashAvg(x: yy2, y: yr3); |
2140 | xr1 = splashAvg(x: xh, y: xr2); |
2141 | yr1 = splashAvg(x: yh, y: yr2); |
2142 | xr0 = splashAvg(x: xl2, y: xr1); |
2143 | yr0 = splashAvg(x: yl2, y: yr1); |
2144 | // add the new subdivision points |
2145 | p3 = (p1 + p2) / 2; |
2146 | cx[p1][1] = xl1; |
2147 | cy[p1][1] = yl1; |
2148 | cx[p1][2] = xl2; |
2149 | cy[p1][2] = yl2; |
2150 | cNext[p1] = p3; |
2151 | cx[p3][0] = xr0; |
2152 | cy[p3][0] = yr0; |
2153 | cx[p3][1] = xr1; |
2154 | cy[p3][1] = yr1; |
2155 | cx[p3][2] = xr2; |
2156 | cy[p3][2] = yr2; |
2157 | cNext[p3] = p2; |
2158 | } |
2159 | } |
2160 | } |
2161 | |
2162 | SplashPath *Splash::makeDashedPath(SplashPath *path) |
2163 | { |
2164 | SplashPath *dPath; |
2165 | SplashCoord lineDashTotal; |
2166 | SplashCoord lineDashStartPhase, lineDashDist, segLen; |
2167 | SplashCoord x0, y0, x1, y1, xa, ya; |
2168 | bool lineDashStartOn, lineDashOn, newPath; |
2169 | int i, j, k; |
2170 | |
2171 | lineDashTotal = 0; |
2172 | for (SplashCoord dash : state->lineDash) { |
2173 | lineDashTotal += dash; |
2174 | } |
2175 | // Acrobat simply draws nothing if the dash array is [0] |
2176 | if (lineDashTotal == 0) { |
2177 | return new SplashPath(); |
2178 | } |
2179 | lineDashStartPhase = state->lineDashPhase; |
2180 | i = splashFloor(x: lineDashStartPhase / lineDashTotal); |
2181 | lineDashStartPhase -= (SplashCoord)i * lineDashTotal; |
2182 | lineDashStartOn = true; |
2183 | size_t lineDashStartIdx = 0; |
2184 | if (lineDashStartPhase > 0) { |
2185 | while (lineDashStartIdx < state->lineDash.size() && lineDashStartPhase >= state->lineDash[lineDashStartIdx]) { |
2186 | lineDashStartOn = !lineDashStartOn; |
2187 | lineDashStartPhase -= state->lineDash[lineDashStartIdx]; |
2188 | ++lineDashStartIdx; |
2189 | } |
2190 | if (unlikely(lineDashStartIdx == state->lineDash.size())) { |
2191 | return new SplashPath(); |
2192 | } |
2193 | } |
2194 | |
2195 | dPath = new SplashPath(); |
2196 | |
2197 | // process each subpath |
2198 | i = 0; |
2199 | while (i < path->length) { |
2200 | |
2201 | // find the end of the subpath |
2202 | for (j = i; j < path->length - 1 && !(path->flags[j] & splashPathLast); ++j) { |
2203 | ; |
2204 | } |
2205 | |
2206 | // initialize the dash parameters |
2207 | lineDashOn = lineDashStartOn; |
2208 | size_t lineDashIdx = lineDashStartIdx; |
2209 | lineDashDist = state->lineDash[lineDashIdx] - lineDashStartPhase; |
2210 | |
2211 | // process each segment of the subpath |
2212 | newPath = true; |
2213 | for (k = i; k < j; ++k) { |
2214 | |
2215 | // grab the segment |
2216 | x0 = path->pts[k].x; |
2217 | y0 = path->pts[k].y; |
2218 | x1 = path->pts[k + 1].x; |
2219 | y1 = path->pts[k + 1].y; |
2220 | segLen = splashDist(x0, y0, x1, y1); |
2221 | |
2222 | // process the segment |
2223 | while (segLen > 0) { |
2224 | |
2225 | if (lineDashDist >= segLen) { |
2226 | if (lineDashOn) { |
2227 | if (newPath) { |
2228 | dPath->moveTo(x: x0, y: y0); |
2229 | newPath = false; |
2230 | } |
2231 | dPath->lineTo(x: x1, y: y1); |
2232 | } |
2233 | lineDashDist -= segLen; |
2234 | segLen = 0; |
2235 | |
2236 | } else { |
2237 | xa = x0 + (lineDashDist / segLen) * (x1 - x0); |
2238 | ya = y0 + (lineDashDist / segLen) * (y1 - y0); |
2239 | if (lineDashOn) { |
2240 | if (newPath) { |
2241 | dPath->moveTo(x: x0, y: y0); |
2242 | newPath = false; |
2243 | } |
2244 | dPath->lineTo(x: xa, y: ya); |
2245 | } |
2246 | x0 = xa; |
2247 | y0 = ya; |
2248 | segLen -= lineDashDist; |
2249 | lineDashDist = 0; |
2250 | } |
2251 | |
2252 | // get the next entry in the dash array |
2253 | if (lineDashDist <= 0) { |
2254 | lineDashOn = !lineDashOn; |
2255 | if (++lineDashIdx == state->lineDash.size()) { |
2256 | lineDashIdx = 0; |
2257 | } |
2258 | lineDashDist = state->lineDash[lineDashIdx]; |
2259 | newPath = true; |
2260 | } |
2261 | } |
2262 | } |
2263 | i = j + 1; |
2264 | } |
2265 | |
2266 | if (dPath->length == 0) { |
2267 | bool allSame = true; |
2268 | for (i = 0; allSame && i < path->length - 1; ++i) { |
2269 | allSame = path->pts[i].x == path->pts[i + 1].x && path->pts[i].y == path->pts[i + 1].y; |
2270 | } |
2271 | if (allSame) { |
2272 | x0 = path->pts[0].x; |
2273 | y0 = path->pts[0].y; |
2274 | dPath->moveTo(x: x0, y: y0); |
2275 | dPath->lineTo(x: x0, y: y0); |
2276 | } |
2277 | } |
2278 | |
2279 | return dPath; |
2280 | } |
2281 | |
2282 | SplashError Splash::fill(SplashPath *path, bool eo) |
2283 | { |
2284 | if (debugMode) { |
2285 | printf(format: "fill [eo:%d]:\n" , eo); |
2286 | dumpPath(path); |
2287 | } |
2288 | return fillWithPattern(path, eo, pattern: state->fillPattern, alpha: state->fillAlpha); |
2289 | } |
2290 | |
2291 | inline void Splash::getBBoxFP(SplashPath *path, SplashCoord *xMinA, SplashCoord *yMinA, SplashCoord *xMaxA, SplashCoord *yMaxA) |
2292 | { |
2293 | SplashCoord xMinFP, yMinFP, xMaxFP, yMaxFP, tx, ty; |
2294 | |
2295 | // make compiler happy: |
2296 | xMinFP = xMaxFP = yMinFP = yMaxFP = 0; |
2297 | for (int i = 0; i < path->length; ++i) { |
2298 | transform(matrix: state->matrix, xi: path->pts[i].x, yi: path->pts[i].y, xo: &tx, yo: &ty); |
2299 | if (i == 0) { |
2300 | xMinFP = xMaxFP = tx; |
2301 | yMinFP = yMaxFP = ty; |
2302 | } else { |
2303 | if (tx < xMinFP) { |
2304 | xMinFP = tx; |
2305 | } |
2306 | if (tx > xMaxFP) { |
2307 | xMaxFP = tx; |
2308 | } |
2309 | if (ty < yMinFP) { |
2310 | yMinFP = ty; |
2311 | } |
2312 | if (ty > yMaxFP) { |
2313 | yMaxFP = ty; |
2314 | } |
2315 | } |
2316 | } |
2317 | |
2318 | *xMinA = xMinFP; |
2319 | *yMinA = yMinFP; |
2320 | *xMaxA = xMaxFP; |
2321 | *yMaxA = yMaxFP; |
2322 | } |
2323 | |
2324 | SplashError Splash::fillWithPattern(SplashPath *path, bool eo, SplashPattern *pattern, SplashCoord alpha) |
2325 | { |
2326 | SplashPipe pipe = {}; |
2327 | int xMinI, yMinI, xMaxI, yMaxI, x0, x1, y; |
2328 | SplashClipResult clipRes, clipRes2; |
2329 | bool adjustLine = false; |
2330 | int linePosI = 0; |
2331 | |
2332 | if (path->length == 0) { |
2333 | return splashErrEmptyPath; |
2334 | } |
2335 | if (pathAllOutside(path)) { |
2336 | opClipRes = splashClipAllOutside; |
2337 | return splashOk; |
2338 | } |
2339 | |
2340 | // add stroke adjustment hints for filled rectangles -- this only |
2341 | // applies to paths that consist of a single subpath |
2342 | // (this appears to match Acrobat's behavior) |
2343 | if (state->strokeAdjust && !path->hints) { |
2344 | int n; |
2345 | n = path->getLength(); |
2346 | if (n == 4 && !(path->flags[0] & splashPathClosed) && !(path->flags[1] & splashPathLast) && !(path->flags[2] & splashPathLast)) { |
2347 | path->close(force: true); |
2348 | path->addStrokeAdjustHint(ctrl0: 0, ctrl1: 2, firstPt: 0, lastPt: 4); |
2349 | path->addStrokeAdjustHint(ctrl0: 1, ctrl1: 3, firstPt: 0, lastPt: 4); |
2350 | } else if (n == 5 && (path->flags[0] & splashPathClosed) && !(path->flags[1] & splashPathLast) && !(path->flags[2] & splashPathLast) && !(path->flags[3] & splashPathLast)) { |
2351 | path->addStrokeAdjustHint(ctrl0: 0, ctrl1: 2, firstPt: 0, lastPt: 4); |
2352 | path->addStrokeAdjustHint(ctrl0: 1, ctrl1: 3, firstPt: 0, lastPt: 4); |
2353 | } |
2354 | } |
2355 | |
2356 | if (thinLineMode != splashThinLineDefault) { |
2357 | if (state->clip->getXMinI() == state->clip->getXMaxI()) { |
2358 | linePosI = state->clip->getXMinI(); |
2359 | adjustLine = true; |
2360 | } else if (state->clip->getXMinI() == state->clip->getXMaxI() - 1) { |
2361 | adjustLine = true; |
2362 | linePosI = splashFloor(x: state->clip->getXMin() + state->lineWidth); |
2363 | } else if (state->clip->getYMinI() == state->clip->getYMaxI()) { |
2364 | linePosI = state->clip->getYMinI(); |
2365 | adjustLine = true; |
2366 | } else if (state->clip->getYMinI() == state->clip->getYMaxI() - 1) { |
2367 | adjustLine = true; |
2368 | linePosI = splashFloor(x: state->clip->getYMin() + state->lineWidth); |
2369 | } |
2370 | } |
2371 | |
2372 | SplashXPath xPath(path, state->matrix, state->flatness, true, adjustLine, linePosI); |
2373 | if (vectorAntialias && !inShading) { |
2374 | xPath.aaScale(); |
2375 | } |
2376 | xPath.sort(); |
2377 | yMinI = state->clip->getYMinI(); |
2378 | yMaxI = state->clip->getYMaxI(); |
2379 | if (vectorAntialias && !inShading) { |
2380 | yMinI = yMinI * splashAASize; |
2381 | yMaxI = (yMaxI + 1) * splashAASize - 1; |
2382 | } |
2383 | SplashXPathScanner scanner(xPath, eo, yMinI, yMaxI); |
2384 | |
2385 | // get the min and max x and y values |
2386 | if (vectorAntialias && !inShading) { |
2387 | scanner.getBBoxAA(xMinA: &xMinI, yMinA: &yMinI, xMaxA: &xMaxI, yMaxA: &yMaxI); |
2388 | } else { |
2389 | scanner.getBBox(xMinA: &xMinI, yMinA: &yMinI, xMaxA: &xMaxI, yMaxA: &yMaxI); |
2390 | } |
2391 | |
2392 | if (eo && (yMinI == yMaxI || xMinI == xMaxI) && thinLineMode != splashThinLineDefault) { |
2393 | SplashCoord delta, xMinFP, yMinFP, xMaxFP, yMaxFP; |
2394 | getBBoxFP(path, xMinA: &xMinFP, yMinA: &yMinFP, xMaxA: &xMaxFP, yMaxA: &yMaxFP); |
2395 | delta = (yMinI == yMaxI) ? yMaxFP - yMinFP : xMaxFP - xMinFP; |
2396 | if (delta < 0.2) { |
2397 | opClipRes = splashClipAllOutside; |
2398 | return splashOk; |
2399 | } |
2400 | } |
2401 | |
2402 | // check clipping |
2403 | if ((clipRes = state->clip->testRect(rectXMin: xMinI, rectYMin: yMinI, rectXMax: xMaxI, rectYMax: yMaxI)) != splashClipAllOutside) { |
2404 | if (scanner.hasPartialClip()) { |
2405 | clipRes = splashClipPartial; |
2406 | } |
2407 | |
2408 | pipeInit(pipe: &pipe, x: 0, y: yMinI, pattern, cSrc: nullptr, aInput: (unsigned char)splashRound(x: alpha * 255), usesShape: vectorAntialias && !inShading, nonIsolatedGroup: false); |
2409 | |
2410 | // draw the spans |
2411 | if (vectorAntialias && !inShading) { |
2412 | for (y = yMinI; y <= yMaxI; ++y) { |
2413 | scanner.renderAALine(aaBuf, x0: &x0, x1: &x1, y, adjustVertLine: thinLineMode != splashThinLineDefault && xMinI == xMaxI); |
2414 | if (clipRes != splashClipAllInside) { |
2415 | state->clip->clipAALine(aaBuf, x0: &x0, x1: &x1, y, adjustVertLine: thinLineMode != splashThinLineDefault && xMinI == xMaxI); |
2416 | } |
2417 | unsigned char lineShape = 255; |
2418 | bool doAdjustLine = false; |
2419 | if (thinLineMode == splashThinLineShape && (xMinI == xMaxI || yMinI == yMaxI)) { |
2420 | // compute line shape for thin lines: |
2421 | SplashCoord mx, my, delta; |
2422 | transform(matrix: state->matrix, xi: 0, yi: 0, xo: &mx, yo: &my); |
2423 | transform(matrix: state->matrix, xi: state->lineWidth, yi: 0, xo: &delta, yo: &my); |
2424 | doAdjustLine = true; |
2425 | lineShape = clip255(x: static_cast<int>((delta - mx) * 255)); |
2426 | } |
2427 | drawAALine(pipe: &pipe, x0, x1, y, adjustLine: doAdjustLine, lineOpacity: lineShape); |
2428 | } |
2429 | } else { |
2430 | for (y = yMinI; y <= yMaxI; ++y) { |
2431 | SplashXPathScanIterator iterator(scanner, y); |
2432 | while (iterator.getNextSpan(x0: &x0, x1: &x1)) { |
2433 | if (clipRes == splashClipAllInside) { |
2434 | drawSpan(pipe: &pipe, x0, x1, y, noClip: true); |
2435 | } else { |
2436 | // limit the x range |
2437 | if (x0 < state->clip->getXMinI()) { |
2438 | x0 = state->clip->getXMinI(); |
2439 | } |
2440 | if (x1 > state->clip->getXMaxI()) { |
2441 | x1 = state->clip->getXMaxI(); |
2442 | } |
2443 | clipRes2 = state->clip->testSpan(spanXMin: x0, spanXMax: x1, spanY: y); |
2444 | drawSpan(pipe: &pipe, x0, x1, y, noClip: clipRes2 == splashClipAllInside); |
2445 | } |
2446 | } |
2447 | } |
2448 | } |
2449 | } |
2450 | opClipRes = clipRes; |
2451 | |
2452 | return splashOk; |
2453 | } |
2454 | |
2455 | bool Splash::pathAllOutside(SplashPath *path) |
2456 | { |
2457 | SplashCoord xMin1, yMin1, xMax1, yMax1; |
2458 | SplashCoord xMin2, yMin2, xMax2, yMax2; |
2459 | SplashCoord x, y; |
2460 | int xMinI, yMinI, xMaxI, yMaxI; |
2461 | int i; |
2462 | |
2463 | xMin1 = xMax1 = path->pts[0].x; |
2464 | yMin1 = yMax1 = path->pts[0].y; |
2465 | for (i = 1; i < path->length; ++i) { |
2466 | if (path->pts[i].x < xMin1) { |
2467 | xMin1 = path->pts[i].x; |
2468 | } else if (path->pts[i].x > xMax1) { |
2469 | xMax1 = path->pts[i].x; |
2470 | } |
2471 | if (path->pts[i].y < yMin1) { |
2472 | yMin1 = path->pts[i].y; |
2473 | } else if (path->pts[i].y > yMax1) { |
2474 | yMax1 = path->pts[i].y; |
2475 | } |
2476 | } |
2477 | |
2478 | transform(matrix: state->matrix, xi: xMin1, yi: yMin1, xo: &x, yo: &y); |
2479 | xMin2 = xMax2 = x; |
2480 | yMin2 = yMax2 = y; |
2481 | transform(matrix: state->matrix, xi: xMin1, yi: yMax1, xo: &x, yo: &y); |
2482 | if (x < xMin2) { |
2483 | xMin2 = x; |
2484 | } else if (x > xMax2) { |
2485 | xMax2 = x; |
2486 | } |
2487 | if (y < yMin2) { |
2488 | yMin2 = y; |
2489 | } else if (y > yMax2) { |
2490 | yMax2 = y; |
2491 | } |
2492 | transform(matrix: state->matrix, xi: xMax1, yi: yMin1, xo: &x, yo: &y); |
2493 | if (x < xMin2) { |
2494 | xMin2 = x; |
2495 | } else if (x > xMax2) { |
2496 | xMax2 = x; |
2497 | } |
2498 | if (y < yMin2) { |
2499 | yMin2 = y; |
2500 | } else if (y > yMax2) { |
2501 | yMax2 = y; |
2502 | } |
2503 | transform(matrix: state->matrix, xi: xMax1, yi: yMax1, xo: &x, yo: &y); |
2504 | if (x < xMin2) { |
2505 | xMin2 = x; |
2506 | } else if (x > xMax2) { |
2507 | xMax2 = x; |
2508 | } |
2509 | if (y < yMin2) { |
2510 | yMin2 = y; |
2511 | } else if (y > yMax2) { |
2512 | yMax2 = y; |
2513 | } |
2514 | xMinI = splashFloor(x: xMin2); |
2515 | yMinI = splashFloor(x: yMin2); |
2516 | xMaxI = splashFloor(x: xMax2); |
2517 | yMaxI = splashFloor(x: yMax2); |
2518 | |
2519 | return state->clip->testRect(rectXMin: xMinI, rectYMin: yMinI, rectXMax: xMaxI, rectYMax: yMaxI) == splashClipAllOutside; |
2520 | } |
2521 | |
2522 | SplashError Splash::xorFill(SplashPath *path, bool eo) |
2523 | { |
2524 | SplashPipe pipe; |
2525 | int xMinI, yMinI, xMaxI, yMaxI, x0, x1, y; |
2526 | SplashClipResult clipRes, clipRes2; |
2527 | SplashBlendFunc origBlendFunc; |
2528 | |
2529 | if (path->length == 0) { |
2530 | return splashErrEmptyPath; |
2531 | } |
2532 | SplashXPath xPath(path, state->matrix, state->flatness, true); |
2533 | xPath.sort(); |
2534 | SplashXPathScanner scanner(xPath, eo, state->clip->getYMinI(), state->clip->getYMaxI()); |
2535 | |
2536 | // get the min and max x and y values |
2537 | scanner.getBBox(xMinA: &xMinI, yMinA: &yMinI, xMaxA: &xMaxI, yMaxA: &yMaxI); |
2538 | |
2539 | // check clipping |
2540 | if ((clipRes = state->clip->testRect(rectXMin: xMinI, rectYMin: yMinI, rectXMax: xMaxI, rectYMax: yMaxI)) != splashClipAllOutside) { |
2541 | if (scanner.hasPartialClip()) { |
2542 | clipRes = splashClipPartial; |
2543 | } |
2544 | |
2545 | origBlendFunc = state->blendFunc; |
2546 | state->blendFunc = &blendXor; |
2547 | pipeInit(pipe: &pipe, x: 0, y: yMinI, pattern: state->fillPattern, cSrc: nullptr, aInput: 255, usesShape: false, nonIsolatedGroup: false); |
2548 | |
2549 | // draw the spans |
2550 | for (y = yMinI; y <= yMaxI; ++y) { |
2551 | SplashXPathScanIterator iterator(scanner, y); |
2552 | while (iterator.getNextSpan(x0: &x0, x1: &x1)) { |
2553 | if (clipRes == splashClipAllInside) { |
2554 | drawSpan(pipe: &pipe, x0, x1, y, noClip: true); |
2555 | } else { |
2556 | // limit the x range |
2557 | if (x0 < state->clip->getXMinI()) { |
2558 | x0 = state->clip->getXMinI(); |
2559 | } |
2560 | if (x1 > state->clip->getXMaxI()) { |
2561 | x1 = state->clip->getXMaxI(); |
2562 | } |
2563 | clipRes2 = state->clip->testSpan(spanXMin: x0, spanXMax: x1, spanY: y); |
2564 | drawSpan(pipe: &pipe, x0, x1, y, noClip: clipRes2 == splashClipAllInside); |
2565 | } |
2566 | } |
2567 | } |
2568 | state->blendFunc = origBlendFunc; |
2569 | } |
2570 | opClipRes = clipRes; |
2571 | |
2572 | return splashOk; |
2573 | } |
2574 | |
2575 | SplashError Splash::fillChar(SplashCoord x, SplashCoord y, int c, SplashFont *font) |
2576 | { |
2577 | SplashGlyphBitmap glyph; |
2578 | SplashCoord xt, yt; |
2579 | int x0, y0, xFrac, yFrac; |
2580 | SplashClipResult clipRes; |
2581 | |
2582 | if (debugMode) { |
2583 | printf(format: "fillChar: x=%.2f y=%.2f c=%3d=0x%02x='%c'\n" , (double)x, (double)y, c, c, c); |
2584 | } |
2585 | transform(matrix: state->matrix, xi: x, yi: y, xo: &xt, yo: &yt); |
2586 | x0 = splashFloor(x: xt); |
2587 | xFrac = splashFloor(x: (xt - x0) * splashFontFraction); |
2588 | y0 = splashFloor(x: yt); |
2589 | yFrac = splashFloor(x: (yt - y0) * splashFontFraction); |
2590 | if (!font->getGlyph(c, xFrac, yFrac, bitmap: &glyph, x0, y0, clip: state->clip, clipRes: &clipRes)) { |
2591 | return splashErrNoGlyph; |
2592 | } |
2593 | if (clipRes != splashClipAllOutside) { |
2594 | fillGlyph2(x0, y0, glyph: &glyph, noclip: clipRes == splashClipAllInside); |
2595 | } |
2596 | opClipRes = clipRes; |
2597 | if (glyph.freeData) { |
2598 | gfree(p: glyph.data); |
2599 | } |
2600 | return splashOk; |
2601 | } |
2602 | |
2603 | void Splash::fillGlyph(SplashCoord x, SplashCoord y, SplashGlyphBitmap *glyph) |
2604 | { |
2605 | SplashCoord xt, yt; |
2606 | int x0, y0; |
2607 | |
2608 | transform(matrix: state->matrix, xi: x, yi: y, xo: &xt, yo: &yt); |
2609 | x0 = splashFloor(x: xt); |
2610 | y0 = splashFloor(x: yt); |
2611 | SplashClipResult clipRes = state->clip->testRect(rectXMin: x0 - glyph->x, rectYMin: y0 - glyph->y, rectXMax: x0 - glyph->x + glyph->w - 1, rectYMax: y0 - glyph->y + glyph->h - 1); |
2612 | if (clipRes != splashClipAllOutside) { |
2613 | fillGlyph2(x0, y0, glyph, noclip: clipRes == splashClipAllInside); |
2614 | } |
2615 | opClipRes = clipRes; |
2616 | } |
2617 | |
2618 | void Splash::fillGlyph2(int x0, int y0, SplashGlyphBitmap *glyph, bool noClip) |
2619 | { |
2620 | SplashPipe pipe; |
2621 | int alpha0; |
2622 | unsigned char alpha; |
2623 | unsigned char *p; |
2624 | int x1, y1, xx, xx1, yy; |
2625 | |
2626 | p = glyph->data; |
2627 | int xStart = x0 - glyph->x; |
2628 | int yStart = y0 - glyph->y; |
2629 | int xxLimit = glyph->w; |
2630 | int yyLimit = glyph->h; |
2631 | int xShift = 0; |
2632 | |
2633 | if (yStart < 0) { |
2634 | p += (glyph->aa ? glyph->w : splashCeil(x: glyph->w / 8.0)) * -yStart; // move p to the beginning of the first painted row |
2635 | yyLimit += yStart; |
2636 | yStart = 0; |
2637 | } |
2638 | |
2639 | if (xStart < 0) { |
2640 | if (glyph->aa) { |
2641 | p += -xStart; |
2642 | } else { |
2643 | p += (-xStart) / 8; |
2644 | xShift = (-xStart) % 8; |
2645 | } |
2646 | xxLimit += xStart; |
2647 | xStart = 0; |
2648 | } |
2649 | |
2650 | if (xxLimit + xStart >= bitmap->width) { |
2651 | xxLimit = bitmap->width - xStart; |
2652 | } |
2653 | if (yyLimit + yStart >= bitmap->height) { |
2654 | yyLimit = bitmap->height - yStart; |
2655 | } |
2656 | |
2657 | if (noClip) { |
2658 | if (glyph->aa) { |
2659 | pipeInit(pipe: &pipe, x: xStart, y: yStart, pattern: state->fillPattern, cSrc: nullptr, aInput: (unsigned char)splashRound(x: state->fillAlpha * 255), usesShape: true, nonIsolatedGroup: false); |
2660 | for (yy = 0, y1 = yStart; yy < yyLimit; ++yy, ++y1) { |
2661 | pipeSetXY(pipe: &pipe, x: xStart, y: y1); |
2662 | for (xx = 0, x1 = xStart; xx < xxLimit; ++xx, ++x1) { |
2663 | alpha = p[xx]; |
2664 | if (alpha != 0) { |
2665 | pipe.shape = alpha; |
2666 | (this->*pipe.run)(&pipe); |
2667 | } else { |
2668 | pipeIncX(pipe: &pipe); |
2669 | } |
2670 | } |
2671 | p += glyph->w; |
2672 | } |
2673 | } else { |
2674 | const int widthEight = splashCeil(x: glyph->w / 8.0); |
2675 | |
2676 | pipeInit(pipe: &pipe, x: xStart, y: yStart, pattern: state->fillPattern, cSrc: nullptr, aInput: (unsigned char)splashRound(x: state->fillAlpha * 255), usesShape: false, nonIsolatedGroup: false); |
2677 | for (yy = 0, y1 = yStart; yy < yyLimit; ++yy, ++y1) { |
2678 | pipeSetXY(pipe: &pipe, x: xStart, y: y1); |
2679 | for (xx = 0, x1 = xStart; xx < xxLimit; xx += 8) { |
2680 | alpha0 = (xShift > 0 && xx < xxLimit - 8 ? (p[xx / 8] << xShift) | (p[xx / 8 + 1] >> (8 - xShift)) : p[xx / 8]); |
2681 | for (xx1 = 0; xx1 < 8 && xx + xx1 < xxLimit; ++xx1, ++x1) { |
2682 | if (alpha0 & 0x80) { |
2683 | (this->*pipe.run)(&pipe); |
2684 | } else { |
2685 | pipeIncX(pipe: &pipe); |
2686 | } |
2687 | alpha0 <<= 1; |
2688 | } |
2689 | } |
2690 | p += widthEight; |
2691 | } |
2692 | } |
2693 | } else { |
2694 | if (glyph->aa) { |
2695 | pipeInit(pipe: &pipe, x: xStart, y: yStart, pattern: state->fillPattern, cSrc: nullptr, aInput: (unsigned char)splashRound(x: state->fillAlpha * 255), usesShape: true, nonIsolatedGroup: false); |
2696 | for (yy = 0, y1 = yStart; yy < yyLimit; ++yy, ++y1) { |
2697 | pipeSetXY(pipe: &pipe, x: xStart, y: y1); |
2698 | for (xx = 0, x1 = xStart; xx < xxLimit; ++xx, ++x1) { |
2699 | if (state->clip->test(x: x1, y: y1)) { |
2700 | alpha = p[xx]; |
2701 | if (alpha != 0) { |
2702 | pipe.shape = alpha; |
2703 | (this->*pipe.run)(&pipe); |
2704 | } else { |
2705 | pipeIncX(pipe: &pipe); |
2706 | } |
2707 | } else { |
2708 | pipeIncX(pipe: &pipe); |
2709 | } |
2710 | } |
2711 | p += glyph->w; |
2712 | } |
2713 | } else { |
2714 | const int widthEight = splashCeil(x: glyph->w / 8.0); |
2715 | |
2716 | pipeInit(pipe: &pipe, x: xStart, y: yStart, pattern: state->fillPattern, cSrc: nullptr, aInput: (unsigned char)splashRound(x: state->fillAlpha * 255), usesShape: false, nonIsolatedGroup: false); |
2717 | for (yy = 0, y1 = yStart; yy < yyLimit; ++yy, ++y1) { |
2718 | pipeSetXY(pipe: &pipe, x: xStart, y: y1); |
2719 | for (xx = 0, x1 = xStart; xx < xxLimit; xx += 8) { |
2720 | alpha0 = (xShift > 0 && xx < xxLimit - 8 ? (p[xx / 8] << xShift) | (p[xx / 8 + 1] >> (8 - xShift)) : p[xx / 8]); |
2721 | for (xx1 = 0; xx1 < 8 && xx + xx1 < xxLimit; ++xx1, ++x1) { |
2722 | if (state->clip->test(x: x1, y: y1)) { |
2723 | if (alpha0 & 0x80) { |
2724 | (this->*pipe.run)(&pipe); |
2725 | } else { |
2726 | pipeIncX(pipe: &pipe); |
2727 | } |
2728 | } else { |
2729 | pipeIncX(pipe: &pipe); |
2730 | } |
2731 | alpha0 <<= 1; |
2732 | } |
2733 | } |
2734 | p += widthEight; |
2735 | } |
2736 | } |
2737 | } |
2738 | } |
2739 | |
2740 | SplashError Splash::fillImageMask(SplashImageMaskSource src, void *srcData, int w, int h, SplashCoord *mat, bool glyphMode) |
2741 | { |
2742 | SplashBitmap *scaledMask; |
2743 | SplashClipResult clipRes; |
2744 | bool minorAxisZero; |
2745 | int x0, y0, x1, y1, scaledWidth, scaledHeight; |
2746 | int yp; |
2747 | |
2748 | if (debugMode) { |
2749 | printf(format: "fillImageMask: w=%d h=%d mat=[%.2f %.2f %.2f %.2f %.2f %.2f]\n" , w, h, (double)mat[0], (double)mat[1], (double)mat[2], (double)mat[3], (double)mat[4], (double)mat[5]); |
2750 | } |
2751 | |
2752 | if (w == 0 && h == 0) { |
2753 | return splashErrZeroImage; |
2754 | } |
2755 | |
2756 | // check for singular matrix |
2757 | if (!splashCheckDet(m11: mat[0], m12: mat[1], m21: mat[2], m22: mat[3], epsilon: 0.000001)) { |
2758 | return splashErrSingularMatrix; |
2759 | } |
2760 | |
2761 | minorAxisZero = mat[1] == 0 && mat[2] == 0; |
2762 | |
2763 | // scaling only |
2764 | if (mat[0] > 0 && minorAxisZero && mat[3] > 0) { |
2765 | x0 = imgCoordMungeLowerC(x: mat[4], glyphMode); |
2766 | y0 = imgCoordMungeLowerC(x: mat[5], glyphMode); |
2767 | x1 = imgCoordMungeUpperC(x: mat[0] + mat[4], glyphMode); |
2768 | y1 = imgCoordMungeUpperC(x: mat[3] + mat[5], glyphMode); |
2769 | // make sure narrow images cover at least one pixel |
2770 | if (x0 == x1) { |
2771 | ++x1; |
2772 | } |
2773 | if (y0 == y1) { |
2774 | ++y1; |
2775 | } |
2776 | clipRes = state->clip->testRect(rectXMin: x0, rectYMin: y0, rectXMax: x1 - 1, rectYMax: y1 - 1); |
2777 | opClipRes = clipRes; |
2778 | if (clipRes != splashClipAllOutside) { |
2779 | scaledWidth = x1 - x0; |
2780 | scaledHeight = y1 - y0; |
2781 | yp = h / scaledHeight; |
2782 | if (yp < 0 || yp > INT_MAX - 1) { |
2783 | return splashErrBadArg; |
2784 | } |
2785 | scaledMask = scaleMask(src, srcData, srcWidth: w, srcHeight: h, scaledWidth, scaledHeight); |
2786 | blitMask(src: scaledMask, xDest: x0, yDest: y0, clipRes); |
2787 | delete scaledMask; |
2788 | } |
2789 | |
2790 | // scaling plus vertical flip |
2791 | } else if (mat[0] > 0 && minorAxisZero && mat[3] < 0) { |
2792 | x0 = imgCoordMungeLowerC(x: mat[4], glyphMode); |
2793 | y0 = imgCoordMungeLowerC(x: mat[3] + mat[5], glyphMode); |
2794 | x1 = imgCoordMungeUpperC(x: mat[0] + mat[4], glyphMode); |
2795 | y1 = imgCoordMungeUpperC(x: mat[5], glyphMode); |
2796 | // make sure narrow images cover at least one pixel |
2797 | if (x0 == x1) { |
2798 | ++x1; |
2799 | } |
2800 | if (y0 == y1) { |
2801 | ++y1; |
2802 | } |
2803 | clipRes = state->clip->testRect(rectXMin: x0, rectYMin: y0, rectXMax: x1 - 1, rectYMax: y1 - 1); |
2804 | opClipRes = clipRes; |
2805 | if (clipRes != splashClipAllOutside) { |
2806 | scaledWidth = x1 - x0; |
2807 | scaledHeight = y1 - y0; |
2808 | yp = h / scaledHeight; |
2809 | if (yp < 0 || yp > INT_MAX - 1) { |
2810 | return splashErrBadArg; |
2811 | } |
2812 | scaledMask = scaleMask(src, srcData, srcWidth: w, srcHeight: h, scaledWidth, scaledHeight); |
2813 | vertFlipImage(img: scaledMask, width: scaledWidth, height: scaledHeight, nComps: 1); |
2814 | blitMask(src: scaledMask, xDest: x0, yDest: y0, clipRes); |
2815 | delete scaledMask; |
2816 | } |
2817 | |
2818 | // all other cases |
2819 | } else { |
2820 | arbitraryTransformMask(src, srcData, srcWidth: w, srcHeight: h, mat, glyphMode); |
2821 | } |
2822 | |
2823 | return splashOk; |
2824 | } |
2825 | |
2826 | void Splash::arbitraryTransformMask(SplashImageMaskSource src, void *srcData, int srcWidth, int srcHeight, SplashCoord *mat, bool glyphMode) |
2827 | { |
2828 | SplashBitmap *scaledMask; |
2829 | SplashClipResult clipRes, clipRes2; |
2830 | SplashPipe pipe; |
2831 | int scaledWidth, scaledHeight, t0, t1; |
2832 | SplashCoord r00, r01, r10, r11, det, ir00, ir01, ir10, ir11; |
2833 | SplashCoord vx[4], vy[4]; |
2834 | int xMin, yMin, xMax, yMax; |
2835 | ImageSection section[3]; |
2836 | int nSections; |
2837 | int y, xa, xb, x, i, xx, yy; |
2838 | |
2839 | // compute the four vertices of the target quadrilateral |
2840 | vx[0] = mat[4]; |
2841 | vy[0] = mat[5]; |
2842 | vx[1] = mat[2] + mat[4]; |
2843 | vy[1] = mat[3] + mat[5]; |
2844 | vx[2] = mat[0] + mat[2] + mat[4]; |
2845 | vy[2] = mat[1] + mat[3] + mat[5]; |
2846 | vx[3] = mat[0] + mat[4]; |
2847 | vy[3] = mat[1] + mat[5]; |
2848 | |
2849 | // make sure vx/vy fit in integers since we're transforming them to in the next lines |
2850 | for (i = 0; i < 4; ++i) { |
2851 | if (unlikely(vx[i] < INT_MIN || vx[i] > INT_MAX || vy[i] < INT_MIN || vy[i] > INT_MAX)) { |
2852 | error(category: errInternal, pos: -1, msg: "arbitraryTransformMask vertices values don't fit in an integer" ); |
2853 | return; |
2854 | } |
2855 | } |
2856 | |
2857 | // clipping |
2858 | xMin = imgCoordMungeLowerC(x: vx[0], glyphMode); |
2859 | xMax = imgCoordMungeUpperC(x: vx[0], glyphMode); |
2860 | yMin = imgCoordMungeLowerC(x: vy[0], glyphMode); |
2861 | yMax = imgCoordMungeUpperC(x: vy[0], glyphMode); |
2862 | for (i = 1; i < 4; ++i) { |
2863 | t0 = imgCoordMungeLowerC(x: vx[i], glyphMode); |
2864 | if (t0 < xMin) { |
2865 | xMin = t0; |
2866 | } |
2867 | t0 = imgCoordMungeUpperC(x: vx[i], glyphMode); |
2868 | if (t0 > xMax) { |
2869 | xMax = t0; |
2870 | } |
2871 | t1 = imgCoordMungeLowerC(x: vy[i], glyphMode); |
2872 | if (t1 < yMin) { |
2873 | yMin = t1; |
2874 | } |
2875 | t1 = imgCoordMungeUpperC(x: vy[i], glyphMode); |
2876 | if (t1 > yMax) { |
2877 | yMax = t1; |
2878 | } |
2879 | } |
2880 | clipRes = state->clip->testRect(rectXMin: xMin, rectYMin: yMin, rectXMax: xMax - 1, rectYMax: yMax - 1); |
2881 | opClipRes = clipRes; |
2882 | if (clipRes == splashClipAllOutside) { |
2883 | return; |
2884 | } |
2885 | |
2886 | // compute the scale factors |
2887 | if (mat[0] >= 0) { |
2888 | t0 = imgCoordMungeUpperC(x: mat[0] + mat[4], glyphMode) - imgCoordMungeLowerC(x: mat[4], glyphMode); |
2889 | } else { |
2890 | t0 = imgCoordMungeUpperC(x: mat[4], glyphMode) - imgCoordMungeLowerC(x: mat[0] + mat[4], glyphMode); |
2891 | } |
2892 | if (mat[1] >= 0) { |
2893 | t1 = imgCoordMungeUpperC(x: mat[1] + mat[5], glyphMode) - imgCoordMungeLowerC(x: mat[5], glyphMode); |
2894 | } else { |
2895 | t1 = imgCoordMungeUpperC(x: mat[5], glyphMode) - imgCoordMungeLowerC(x: mat[1] + mat[5], glyphMode); |
2896 | } |
2897 | scaledWidth = t0 > t1 ? t0 : t1; |
2898 | if (mat[2] >= 0) { |
2899 | t0 = imgCoordMungeUpperC(x: mat[2] + mat[4], glyphMode) - imgCoordMungeLowerC(x: mat[4], glyphMode); |
2900 | } else { |
2901 | t0 = imgCoordMungeUpperC(x: mat[4], glyphMode) - imgCoordMungeLowerC(x: mat[2] + mat[4], glyphMode); |
2902 | } |
2903 | if (mat[3] >= 0) { |
2904 | t1 = imgCoordMungeUpperC(x: mat[3] + mat[5], glyphMode) - imgCoordMungeLowerC(x: mat[5], glyphMode); |
2905 | } else { |
2906 | t1 = imgCoordMungeUpperC(x: mat[5], glyphMode) - imgCoordMungeLowerC(x: mat[3] + mat[5], glyphMode); |
2907 | } |
2908 | scaledHeight = t0 > t1 ? t0 : t1; |
2909 | if (scaledWidth == 0) { |
2910 | scaledWidth = 1; |
2911 | } |
2912 | if (scaledHeight == 0) { |
2913 | scaledHeight = 1; |
2914 | } |
2915 | |
2916 | // compute the inverse transform (after scaling) matrix |
2917 | r00 = mat[0] / scaledWidth; |
2918 | r01 = mat[1] / scaledWidth; |
2919 | r10 = mat[2] / scaledHeight; |
2920 | r11 = mat[3] / scaledHeight; |
2921 | det = r00 * r11 - r01 * r10; |
2922 | if (splashAbs(x: det) < 1e-6) { |
2923 | // this should be caught by the singular matrix check in fillImageMask |
2924 | return; |
2925 | } |
2926 | ir00 = r11 / det; |
2927 | ir01 = -r01 / det; |
2928 | ir10 = -r10 / det; |
2929 | ir11 = r00 / det; |
2930 | |
2931 | // scale the input image |
2932 | scaledMask = scaleMask(src, srcData, srcWidth, srcHeight, scaledWidth, scaledHeight); |
2933 | if (scaledMask->data == nullptr) { |
2934 | error(category: errInternal, pos: -1, msg: "scaledMask->data is NULL in Splash::arbitraryTransformMask" ); |
2935 | delete scaledMask; |
2936 | return; |
2937 | } |
2938 | |
2939 | // construct the three sections |
2940 | i = (vy[2] <= vy[3]) ? 2 : 3; |
2941 | if (vy[1] <= vy[i]) { |
2942 | i = 1; |
2943 | } |
2944 | if (vy[0] < vy[i] || (i != 3 && vy[0] == vy[i])) { |
2945 | i = 0; |
2946 | } |
2947 | if (vy[i] == vy[(i + 1) & 3]) { |
2948 | section[0].y0 = imgCoordMungeLowerC(x: vy[i], glyphMode); |
2949 | section[0].y1 = imgCoordMungeUpperC(x: vy[(i + 2) & 3], glyphMode) - 1; |
2950 | if (vx[i] < vx[(i + 1) & 3]) { |
2951 | section[0].ia0 = i; |
2952 | section[0].ia1 = (i + 3) & 3; |
2953 | section[0].ib0 = (i + 1) & 3; |
2954 | section[0].ib1 = (i + 2) & 3; |
2955 | } else { |
2956 | section[0].ia0 = (i + 1) & 3; |
2957 | section[0].ia1 = (i + 2) & 3; |
2958 | section[0].ib0 = i; |
2959 | section[0].ib1 = (i + 3) & 3; |
2960 | } |
2961 | nSections = 1; |
2962 | } else { |
2963 | section[0].y0 = imgCoordMungeLowerC(x: vy[i], glyphMode); |
2964 | section[2].y1 = imgCoordMungeUpperC(x: vy[(i + 2) & 3], glyphMode) - 1; |
2965 | section[0].ia0 = section[0].ib0 = i; |
2966 | section[2].ia1 = section[2].ib1 = (i + 2) & 3; |
2967 | if (vx[(i + 1) & 3] < vx[(i + 3) & 3]) { |
2968 | section[0].ia1 = section[2].ia0 = (i + 1) & 3; |
2969 | section[0].ib1 = section[2].ib0 = (i + 3) & 3; |
2970 | } else { |
2971 | section[0].ia1 = section[2].ia0 = (i + 3) & 3; |
2972 | section[0].ib1 = section[2].ib0 = (i + 1) & 3; |
2973 | } |
2974 | if (vy[(i + 1) & 3] < vy[(i + 3) & 3]) { |
2975 | section[1].y0 = imgCoordMungeLowerC(x: vy[(i + 1) & 3], glyphMode); |
2976 | section[2].y0 = imgCoordMungeUpperC(x: vy[(i + 3) & 3], glyphMode); |
2977 | if (vx[(i + 1) & 3] < vx[(i + 3) & 3]) { |
2978 | section[1].ia0 = (i + 1) & 3; |
2979 | section[1].ia1 = (i + 2) & 3; |
2980 | section[1].ib0 = i; |
2981 | section[1].ib1 = (i + 3) & 3; |
2982 | } else { |
2983 | section[1].ia0 = i; |
2984 | section[1].ia1 = (i + 3) & 3; |
2985 | section[1].ib0 = (i + 1) & 3; |
2986 | section[1].ib1 = (i + 2) & 3; |
2987 | } |
2988 | } else { |
2989 | section[1].y0 = imgCoordMungeLowerC(x: vy[(i + 3) & 3], glyphMode); |
2990 | section[2].y0 = imgCoordMungeUpperC(x: vy[(i + 1) & 3], glyphMode); |
2991 | if (vx[(i + 1) & 3] < vx[(i + 3) & 3]) { |
2992 | section[1].ia0 = i; |
2993 | section[1].ia1 = (i + 1) & 3; |
2994 | section[1].ib0 = (i + 3) & 3; |
2995 | section[1].ib1 = (i + 2) & 3; |
2996 | } else { |
2997 | section[1].ia0 = (i + 3) & 3; |
2998 | section[1].ia1 = (i + 2) & 3; |
2999 | section[1].ib0 = i; |
3000 | section[1].ib1 = (i + 1) & 3; |
3001 | } |
3002 | } |
3003 | section[0].y1 = section[1].y0 - 1; |
3004 | section[1].y1 = section[2].y0 - 1; |
3005 | nSections = 3; |
3006 | } |
3007 | for (i = 0; i < nSections; ++i) { |
3008 | section[i].xa0 = vx[section[i].ia0]; |
3009 | section[i].ya0 = vy[section[i].ia0]; |
3010 | section[i].xa1 = vx[section[i].ia1]; |
3011 | section[i].ya1 = vy[section[i].ia1]; |
3012 | section[i].xb0 = vx[section[i].ib0]; |
3013 | section[i].yb0 = vy[section[i].ib0]; |
3014 | section[i].xb1 = vx[section[i].ib1]; |
3015 | section[i].yb1 = vy[section[i].ib1]; |
3016 | section[i].dxdya = (section[i].xa1 - section[i].xa0) / (section[i].ya1 - section[i].ya0); |
3017 | section[i].dxdyb = (section[i].xb1 - section[i].xb0) / (section[i].yb1 - section[i].yb0); |
3018 | } |
3019 | |
3020 | // initialize the pixel pipe |
3021 | pipeInit(pipe: &pipe, x: 0, y: 0, pattern: state->fillPattern, cSrc: nullptr, aInput: (unsigned char)splashRound(x: state->fillAlpha * 255), usesShape: true, nonIsolatedGroup: false); |
3022 | if (vectorAntialias) { |
3023 | drawAAPixelInit(); |
3024 | } |
3025 | |
3026 | // make sure narrow images cover at least one pixel |
3027 | if (nSections == 1) { |
3028 | if (section[0].y0 == section[0].y1) { |
3029 | ++section[0].y1; |
3030 | clipRes = opClipRes = splashClipPartial; |
3031 | } |
3032 | } else { |
3033 | if (section[0].y0 == section[2].y1) { |
3034 | ++section[1].y1; |
3035 | clipRes = opClipRes = splashClipPartial; |
3036 | } |
3037 | } |
3038 | |
3039 | // scan all pixels inside the target region |
3040 | for (i = 0; i < nSections; ++i) { |
3041 | for (y = section[i].y0; y <= section[i].y1; ++y) { |
3042 | xa = imgCoordMungeLowerC(x: section[i].xa0 + ((SplashCoord)y + 0.5 - section[i].ya0) * section[i].dxdya, glyphMode); |
3043 | xb = imgCoordMungeUpperC(x: section[i].xb0 + ((SplashCoord)y + 0.5 - section[i].yb0) * section[i].dxdyb, glyphMode); |
3044 | if (unlikely(xa < 0)) { |
3045 | xa = 0; |
3046 | } |
3047 | // make sure narrow images cover at least one pixel |
3048 | if (xa == xb) { |
3049 | ++xb; |
3050 | } |
3051 | if (clipRes != splashClipAllInside) { |
3052 | clipRes2 = state->clip->testSpan(spanXMin: xa, spanXMax: xb - 1, spanY: y); |
3053 | } else { |
3054 | clipRes2 = clipRes; |
3055 | } |
3056 | for (x = xa; x < xb; ++x) { |
3057 | // map (x+0.5, y+0.5) back to the scaled image |
3058 | xx = splashFloor(x: ((SplashCoord)x + 0.5 - mat[4]) * ir00 + ((SplashCoord)y + 0.5 - mat[5]) * ir10); |
3059 | yy = splashFloor(x: ((SplashCoord)x + 0.5 - mat[4]) * ir01 + ((SplashCoord)y + 0.5 - mat[5]) * ir11); |
3060 | // xx should always be within bounds, but floating point |
3061 | // inaccuracy can cause problems |
3062 | if (unlikely(xx < 0)) { |
3063 | xx = 0; |
3064 | clipRes2 = splashClipPartial; |
3065 | } else if (unlikely(xx >= scaledWidth)) { |
3066 | xx = scaledWidth - 1; |
3067 | clipRes2 = splashClipPartial; |
3068 | } |
3069 | if (unlikely(yy < 0)) { |
3070 | yy = 0; |
3071 | clipRes2 = splashClipPartial; |
3072 | } else if (unlikely(yy >= scaledHeight)) { |
3073 | yy = scaledHeight - 1; |
3074 | clipRes2 = splashClipPartial; |
3075 | } |
3076 | pipe.shape = scaledMask->data[yy * scaledWidth + xx]; |
3077 | if (vectorAntialias && clipRes2 != splashClipAllInside) { |
3078 | drawAAPixel(pipe: &pipe, x, y); |
3079 | } else { |
3080 | drawPixel(pipe: &pipe, x, y, noClip: clipRes2 == splashClipAllInside); |
3081 | } |
3082 | } |
3083 | } |
3084 | } |
3085 | |
3086 | delete scaledMask; |
3087 | } |
3088 | |
3089 | // Scale an image mask into a SplashBitmap. |
3090 | SplashBitmap *Splash::scaleMask(SplashImageMaskSource src, void *srcData, int srcWidth, int srcHeight, int scaledWidth, int scaledHeight) |
3091 | { |
3092 | SplashBitmap *dest; |
3093 | |
3094 | dest = new SplashBitmap(scaledWidth, scaledHeight, 1, splashModeMono8, false); |
3095 | if (scaledHeight < srcHeight) { |
3096 | if (scaledWidth < srcWidth) { |
3097 | scaleMaskYdownXdown(src, srcData, srcWidth, srcHeight, scaledWidth, scaledHeight, dest); |
3098 | } else { |
3099 | scaleMaskYdownXup(src, srcData, srcWidth, srcHeight, scaledWidth, scaledHeight, dest); |
3100 | } |
3101 | } else { |
3102 | if (scaledWidth < srcWidth) { |
3103 | scaleMaskYupXdown(src, srcData, srcWidth, srcHeight, scaledWidth, scaledHeight, dest); |
3104 | } else { |
3105 | scaleMaskYupXup(src, srcData, srcWidth, srcHeight, scaledWidth, scaledHeight, dest); |
3106 | } |
3107 | } |
3108 | return dest; |
3109 | } |
3110 | |
3111 | void Splash::scaleMaskYdownXdown(SplashImageMaskSource src, void *srcData, int srcWidth, int srcHeight, int scaledWidth, int scaledHeight, SplashBitmap *dest) |
3112 | { |
3113 | unsigned char *lineBuf; |
3114 | unsigned int *pixBuf; |
3115 | unsigned int pix; |
3116 | unsigned char *destPtr; |
3117 | int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, xx, d, d0, d1; |
3118 | int i, j; |
3119 | |
3120 | // Bresenham parameters for y scale |
3121 | yp = srcHeight / scaledHeight; |
3122 | yq = srcHeight % scaledHeight; |
3123 | |
3124 | // Bresenham parameters for x scale |
3125 | xp = srcWidth / scaledWidth; |
3126 | xq = srcWidth % scaledWidth; |
3127 | |
3128 | // allocate buffers |
3129 | lineBuf = (unsigned char *)gmalloc_checkoverflow(size: srcWidth); |
3130 | if (unlikely(!lineBuf)) { |
3131 | error(category: errInternal, pos: -1, msg: "Couldn't allocate memory for lineBuf in Splash::scaleMaskYdownXdown" ); |
3132 | return; |
3133 | } |
3134 | |
3135 | pixBuf = (unsigned int *)gmallocn_checkoverflow(count: srcWidth, size: sizeof(int)); |
3136 | if (unlikely(!pixBuf)) { |
3137 | error(category: errInternal, pos: -1, msg: "Couldn't allocate memory for pixBuf in Splash::scaleMaskYdownXdown" ); |
3138 | gfree(p: lineBuf); |
3139 | return; |
3140 | } |
3141 | |
3142 | // init y scale Bresenham |
3143 | yt = 0; |
3144 | |
3145 | destPtr = dest->data; |
3146 | for (y = 0; y < scaledHeight; ++y) { |
3147 | |
3148 | // y scale Bresenham |
3149 | if ((yt += yq) >= scaledHeight) { |
3150 | yt -= scaledHeight; |
3151 | yStep = yp + 1; |
3152 | } else { |
3153 | yStep = yp; |
3154 | } |
3155 | |
3156 | // read rows from image |
3157 | memset(s: pixBuf, c: 0, n: srcWidth * sizeof(int)); |
3158 | for (i = 0; i < yStep; ++i) { |
3159 | (*src)(srcData, lineBuf); |
3160 | for (j = 0; j < srcWidth; ++j) { |
3161 | pixBuf[j] += lineBuf[j]; |
3162 | } |
3163 | } |
3164 | |
3165 | // init x scale Bresenham |
3166 | xt = 0; |
3167 | d0 = (255 << 23) / (yStep * xp); |
3168 | d1 = (255 << 23) / (yStep * (xp + 1)); |
3169 | |
3170 | xx = 0; |
3171 | for (x = 0; x < scaledWidth; ++x) { |
3172 | |
3173 | // x scale Bresenham |
3174 | if ((xt += xq) >= scaledWidth) { |
3175 | xt -= scaledWidth; |
3176 | xStep = xp + 1; |
3177 | d = d1; |
3178 | } else { |
3179 | xStep = xp; |
3180 | d = d0; |
3181 | } |
3182 | |
3183 | // compute the final pixel |
3184 | pix = 0; |
3185 | for (i = 0; i < xStep; ++i) { |
3186 | pix += pixBuf[xx++]; |
3187 | } |
3188 | // (255 * pix) / xStep * yStep |
3189 | pix = (pix * d) >> 23; |
3190 | |
3191 | // store the pixel |
3192 | *destPtr++ = (unsigned char)pix; |
3193 | } |
3194 | } |
3195 | |
3196 | gfree(p: pixBuf); |
3197 | gfree(p: lineBuf); |
3198 | } |
3199 | |
3200 | void Splash::scaleMaskYdownXup(SplashImageMaskSource src, void *srcData, int srcWidth, int srcHeight, int scaledWidth, int scaledHeight, SplashBitmap *dest) |
3201 | { |
3202 | unsigned char *lineBuf; |
3203 | unsigned int *pixBuf; |
3204 | unsigned int pix; |
3205 | unsigned char *destPtr; |
3206 | int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, d; |
3207 | int i, j; |
3208 | |
3209 | destPtr = dest->data; |
3210 | if (destPtr == nullptr) { |
3211 | error(category: errInternal, pos: -1, msg: "dest->data is NULL in Splash::scaleMaskYdownXup" ); |
3212 | return; |
3213 | } |
3214 | |
3215 | // Bresenham parameters for y scale |
3216 | yp = srcHeight / scaledHeight; |
3217 | yq = srcHeight % scaledHeight; |
3218 | |
3219 | // Bresenham parameters for x scale |
3220 | xp = scaledWidth / srcWidth; |
3221 | xq = scaledWidth % srcWidth; |
3222 | |
3223 | // allocate buffers |
3224 | lineBuf = (unsigned char *)gmalloc_checkoverflow(size: srcWidth); |
3225 | if (unlikely(!lineBuf)) { |
3226 | error(category: errInternal, pos: -1, msg: "Couldn't allocate memory for lineBuf in Splash::scaleMaskYdownXup" ); |
3227 | return; |
3228 | } |
3229 | |
3230 | pixBuf = (unsigned int *)gmallocn_checkoverflow(count: srcWidth, size: sizeof(int)); |
3231 | if (unlikely(!pixBuf)) { |
3232 | error(category: errInternal, pos: -1, msg: "Couldn't allocate memory for pixBuf in Splash::scaleMaskYdownXup" ); |
3233 | gfree(p: lineBuf); |
3234 | return; |
3235 | } |
3236 | |
3237 | // init y scale Bresenham |
3238 | yt = 0; |
3239 | |
3240 | for (y = 0; y < scaledHeight; ++y) { |
3241 | |
3242 | // y scale Bresenham |
3243 | if ((yt += yq) >= scaledHeight) { |
3244 | yt -= scaledHeight; |
3245 | yStep = yp + 1; |
3246 | } else { |
3247 | yStep = yp; |
3248 | } |
3249 | |
3250 | // read rows from image |
3251 | memset(s: pixBuf, c: 0, n: srcWidth * sizeof(int)); |
3252 | for (i = 0; i < yStep; ++i) { |
3253 | (*src)(srcData, lineBuf); |
3254 | for (j = 0; j < srcWidth; ++j) { |
3255 | pixBuf[j] += lineBuf[j]; |
3256 | } |
3257 | } |
3258 | |
3259 | // init x scale Bresenham |
3260 | xt = 0; |
3261 | d = (255 << 23) / yStep; |
3262 | |
3263 | for (x = 0; x < srcWidth; ++x) { |
3264 | |
3265 | // x scale Bresenham |
3266 | if ((xt += xq) >= srcWidth) { |
3267 | xt -= srcWidth; |
3268 | xStep = xp + 1; |
3269 | } else { |
3270 | xStep = xp; |
3271 | } |
3272 | |
3273 | // compute the final pixel |
3274 | pix = pixBuf[x]; |
3275 | // (255 * pix) / yStep |
3276 | pix = (pix * d) >> 23; |
3277 | |
3278 | // store the pixel |
3279 | for (i = 0; i < xStep; ++i) { |
3280 | *destPtr++ = (unsigned char)pix; |
3281 | } |
3282 | } |
3283 | } |
3284 | |
3285 | gfree(p: pixBuf); |
3286 | gfree(p: lineBuf); |
3287 | } |
3288 | |
3289 | void Splash::scaleMaskYupXdown(SplashImageMaskSource src, void *srcData, int srcWidth, int srcHeight, int scaledWidth, int scaledHeight, SplashBitmap *dest) |
3290 | { |
3291 | unsigned char *lineBuf; |
3292 | unsigned int pix; |
3293 | unsigned char *destPtr0, *destPtr; |
3294 | int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, xx, d, d0, d1; |
3295 | int i; |
3296 | |
3297 | destPtr0 = dest->data; |
3298 | if (destPtr0 == nullptr) { |
3299 | error(category: errInternal, pos: -1, msg: "dest->data is NULL in Splash::scaleMaskYupXdown" ); |
3300 | return; |
3301 | } |
3302 | |
3303 | // Bresenham parameters for y scale |
3304 | yp = scaledHeight / srcHeight; |
3305 | yq = scaledHeight % srcHeight; |
3306 | |
3307 | // Bresenham parameters for x scale |
3308 | xp = srcWidth / scaledWidth; |
3309 | xq = srcWidth % scaledWidth; |
3310 | |
3311 | // allocate buffers |
3312 | lineBuf = (unsigned char *)gmalloc_checkoverflow(size: srcWidth); |
3313 | if (unlikely(!lineBuf)) { |
3314 | error(category: errInternal, pos: -1, msg: "Couldn't allocate memory for lineBuf in Splash::scaleMaskYupXdown" ); |
3315 | return; |
3316 | } |
3317 | |
3318 | // init y scale Bresenham |
3319 | yt = 0; |
3320 | |
3321 | for (y = 0; y < srcHeight; ++y) { |
3322 | |
3323 | // y scale Bresenham |
3324 | if ((yt += yq) >= srcHeight) { |
3325 | yt -= srcHeight; |
3326 | yStep = yp + 1; |
3327 | } else { |
3328 | yStep = yp; |
3329 | } |
3330 | |
3331 | // read row from image |
3332 | (*src)(srcData, lineBuf); |
3333 | |
3334 | // init x scale Bresenham |
3335 | xt = 0; |
3336 | d0 = (255 << 23) / xp; |
3337 | d1 = (255 << 23) / (xp + 1); |
3338 | |
3339 | xx = 0; |
3340 | for (x = 0; x < scaledWidth; ++x) { |
3341 | |
3342 | // x scale Bresenham |
3343 | if ((xt += xq) >= scaledWidth) { |
3344 | xt -= scaledWidth; |
3345 | xStep = xp + 1; |
3346 | d = d1; |
3347 | } else { |
3348 | xStep = xp; |
3349 | d = d0; |
3350 | } |
3351 | |
3352 | // compute the final pixel |
3353 | pix = 0; |
3354 | for (i = 0; i < xStep; ++i) { |
3355 | pix += lineBuf[xx++]; |
3356 | } |
3357 | // (255 * pix) / xStep |
3358 | pix = (pix * d) >> 23; |
3359 | |
3360 | // store the pixel |
3361 | for (i = 0; i < yStep; ++i) { |
3362 | destPtr = destPtr0 + i * scaledWidth + x; |
3363 | *destPtr = (unsigned char)pix; |
3364 | } |
3365 | } |
3366 | |
3367 | destPtr0 += yStep * scaledWidth; |
3368 | } |
3369 | |
3370 | gfree(p: lineBuf); |
3371 | } |
3372 | |
3373 | void Splash::scaleMaskYupXup(SplashImageMaskSource src, void *srcData, int srcWidth, int srcHeight, int scaledWidth, int scaledHeight, SplashBitmap *dest) |
3374 | { |
3375 | unsigned char *lineBuf; |
3376 | unsigned int pix; |
3377 | unsigned char *destPtr0, *destPtr; |
3378 | int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, xx; |
3379 | int i, j; |
3380 | |
3381 | destPtr0 = dest->data; |
3382 | if (destPtr0 == nullptr) { |
3383 | error(category: errInternal, pos: -1, msg: "dest->data is NULL in Splash::scaleMaskYupXup" ); |
3384 | return; |
3385 | } |
3386 | |
3387 | if (unlikely(srcWidth <= 0 || srcHeight <= 0)) { |
3388 | error(category: errSyntaxError, pos: -1, msg: "srcWidth <= 0 || srcHeight <= 0 in Splash::scaleMaskYupXup" ); |
3389 | gfree(p: dest->takeData()); |
3390 | return; |
3391 | } |
3392 | |
3393 | // Bresenham parameters for y scale |
3394 | yp = scaledHeight / srcHeight; |
3395 | yq = scaledHeight % srcHeight; |
3396 | |
3397 | // Bresenham parameters for x scale |
3398 | xp = scaledWidth / srcWidth; |
3399 | xq = scaledWidth % srcWidth; |
3400 | |
3401 | // allocate buffers |
3402 | lineBuf = (unsigned char *)gmalloc_checkoverflow(size: srcWidth); |
3403 | if (unlikely(!lineBuf)) { |
3404 | error(category: errInternal, pos: -1, msg: "Couldn't allocate memory for lineBuf in Splash::scaleMaskYupXup" ); |
3405 | return; |
3406 | } |
3407 | |
3408 | // init y scale Bresenham |
3409 | yt = 0; |
3410 | |
3411 | for (y = 0; y < srcHeight; ++y) { |
3412 | |
3413 | // y scale Bresenham |
3414 | if ((yt += yq) >= srcHeight) { |
3415 | yt -= srcHeight; |
3416 | yStep = yp + 1; |
3417 | } else { |
3418 | yStep = yp; |
3419 | } |
3420 | |
3421 | // read row from image |
3422 | (*src)(srcData, lineBuf); |
3423 | |
3424 | // init x scale Bresenham |
3425 | xt = 0; |
3426 | |
3427 | xx = 0; |
3428 | for (x = 0; x < srcWidth; ++x) { |
3429 | |
3430 | // x scale Bresenham |
3431 | if ((xt += xq) >= srcWidth) { |
3432 | xt -= srcWidth; |
3433 | xStep = xp + 1; |
3434 | } else { |
3435 | xStep = xp; |
3436 | } |
3437 | |
3438 | // compute the final pixel |
3439 | pix = lineBuf[x] ? 255 : 0; |
3440 | |
3441 | // store the pixel |
3442 | for (i = 0; i < yStep; ++i) { |
3443 | for (j = 0; j < xStep; ++j) { |
3444 | destPtr = destPtr0 + i * scaledWidth + xx + j; |
3445 | *destPtr++ = (unsigned char)pix; |
3446 | } |
3447 | } |
3448 | |
3449 | xx += xStep; |
3450 | } |
3451 | |
3452 | destPtr0 += yStep * scaledWidth; |
3453 | } |
3454 | |
3455 | gfree(p: lineBuf); |
3456 | } |
3457 | |
3458 | void Splash::blitMask(SplashBitmap *src, int xDest, int yDest, SplashClipResult clipRes) |
3459 | { |
3460 | SplashPipe pipe; |
3461 | unsigned char *p; |
3462 | int w, h, x, y; |
3463 | |
3464 | w = src->getWidth(); |
3465 | h = src->getHeight(); |
3466 | p = src->getDataPtr(); |
3467 | if (p == nullptr) { |
3468 | error(category: errInternal, pos: -1, msg: "src->getDataPtr() is NULL in Splash::blitMask" ); |
3469 | return; |
3470 | } |
3471 | if (vectorAntialias && clipRes != splashClipAllInside) { |
3472 | pipeInit(pipe: &pipe, x: xDest, y: yDest, pattern: state->fillPattern, cSrc: nullptr, aInput: (unsigned char)splashRound(x: state->fillAlpha * 255), usesShape: true, nonIsolatedGroup: false); |
3473 | drawAAPixelInit(); |
3474 | for (y = 0; y < h; ++y) { |
3475 | for (x = 0; x < w; ++x) { |
3476 | pipe.shape = *p++; |
3477 | drawAAPixel(pipe: &pipe, x: xDest + x, y: yDest + y); |
3478 | } |
3479 | } |
3480 | } else { |
3481 | pipeInit(pipe: &pipe, x: xDest, y: yDest, pattern: state->fillPattern, cSrc: nullptr, aInput: (unsigned char)splashRound(x: state->fillAlpha * 255), usesShape: true, nonIsolatedGroup: false); |
3482 | if (clipRes == splashClipAllInside) { |
3483 | for (y = 0; y < h; ++y) { |
3484 | pipeSetXY(pipe: &pipe, x: xDest, y: yDest + y); |
3485 | for (x = 0; x < w; ++x) { |
3486 | if (*p) { |
3487 | pipe.shape = *p; |
3488 | (this->*pipe.run)(&pipe); |
3489 | } else { |
3490 | pipeIncX(pipe: &pipe); |
3491 | } |
3492 | ++p; |
3493 | } |
3494 | } |
3495 | } else { |
3496 | for (y = 0; y < h; ++y) { |
3497 | pipeSetXY(pipe: &pipe, x: xDest, y: yDest + y); |
3498 | for (x = 0; x < w; ++x) { |
3499 | if (*p && state->clip->test(x: xDest + x, y: yDest + y)) { |
3500 | pipe.shape = *p; |
3501 | (this->*pipe.run)(&pipe); |
3502 | } else { |
3503 | pipeIncX(pipe: &pipe); |
3504 | } |
3505 | ++p; |
3506 | } |
3507 | } |
3508 | } |
3509 | } |
3510 | } |
3511 | |
3512 | SplashError Splash::drawImage(SplashImageSource src, SplashICCTransform tf, void *srcData, SplashColorMode srcMode, bool srcAlpha, int w, int h, SplashCoord *mat, bool interpolate, bool tilingPattern) |
3513 | { |
3514 | bool ok; |
3515 | SplashBitmap *scaledImg; |
3516 | SplashClipResult clipRes; |
3517 | bool minorAxisZero; |
3518 | int x0, y0, x1, y1, scaledWidth, scaledHeight; |
3519 | int nComps; |
3520 | int |
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