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39
40#include "qtextureatlas_p.h"
41#include "qtextureatlas_p_p.h"
42#include <Qt3DRender/qtexturedata.h>
43#include <Qt3DRender/qabstracttextureimage.h>
44
45QT_BEGIN_NAMESPACE
46
47using namespace Qt3DCore;
48
49namespace Qt3DExtras {
50
51QTextureAtlasData::QTextureAtlasData(int w, int h, QImage::Format fmt)
52 : m_image(w, h, fmt)
53{
54 m_image.fill(pixel: 0);
55}
56
57QTextureAtlasData::~QTextureAtlasData()
58{
59}
60
61void QTextureAtlasData::addImage(const AtlasTexture &texture, const QImage &image)
62{
63 QMutexLocker lock(&m_mutex);
64
65 Update update;
66 update.textureInfo = texture;
67 update.image = image;
68 m_updates << update;
69}
70
71QByteArray QTextureAtlasData::createUpdatedImageData()
72{
73 m_mutex.lock();
74 const QVector<Update> updates = std::move(m_updates);
75 m_mutex.unlock();
76
77 // copy sub-images into the actual texture image
78 for (const Update &update : updates) {
79 const QImage &image = update.image;
80
81 const int padding = update.textureInfo.padding;
82 const QRect imgRect = update.textureInfo.position;
83 const QRect alloc = imgRect.adjusted(xp1: -padding, yp1: -padding, xp2: padding, yp2: padding);
84
85 // bytes per pixel
86 if (image.depth() != m_image.depth()) {
87 qWarning() << "[QTextureAtlas] Image depth does not match. Original =" << m_image.depth() << ", Sub-Image =" << image.depth();
88 continue;
89 }
90 int bpp = image.depth() / 8;
91
92 // copy image contents into texture image
93 // use image border pixels to fill the padding region
94 for (int y = alloc.top(); y <= alloc.bottom(); y++) {
95 uchar *dstLine = m_image.scanLine(y);
96
97 uchar *dstPadL = &dstLine[bpp * alloc.left()];
98 uchar *dstPadR = &dstLine[bpp * imgRect.right()];
99 uchar *dstImg = &dstLine[bpp * imgRect.left()];
100
101 // do padding with 0 in the upper/lower padding parts around the actual image
102 if (y < imgRect.top() || y > imgRect.bottom()) {
103 memset(s: dstPadL, c: 0, n: bpp * (imgRect.width() + 2 * padding));
104 continue;
105 }
106
107 // copy left and right padding pixels
108 memset(s: dstPadL, c: 0, n: bpp * padding);
109 memset(s: dstPadR, c: 0, n: bpp * padding);
110
111 // copy image scanline
112 const int ySrc = qBound(min: 0, val: y - imgRect.top(), max: image.height()-1);
113 memcpy(dest: dstImg, src: image.scanLine(ySrc), n: bpp * imgRect.width());
114 }
115 }
116
117 return QByteArray(reinterpret_cast<const char*>(m_image.constBits()), m_image.sizeInBytes());
118}
119
120QTextureAtlasPrivate::QTextureAtlasPrivate()
121 : Qt3DRender::QAbstractTexturePrivate()
122{
123 m_target = Qt3DRender::QAbstractTexture::TargetAutomatic;
124 m_format = Qt3DRender::QAbstractTexture::RGBA8_UNorm;
125 m_width = 256;
126 m_height = 256;
127 m_depth = 1;
128}
129
130QTextureAtlasPrivate::~QTextureAtlasPrivate()
131{
132}
133
134QTextureAtlasGenerator::QTextureAtlasGenerator(const QTextureAtlasPrivate *texAtlas)
135 : m_data(texAtlas->m_data)
136 , m_format(texAtlas->m_format)
137 , m_pixelFormat(texAtlas->m_pixelFormat)
138 , m_generation(texAtlas->m_currGen)
139 , m_atlasId(texAtlas->m_id)
140{
141}
142
143QTextureAtlasGenerator::~QTextureAtlasGenerator()
144{
145}
146
147Qt3DRender::QTextureDataPtr QTextureAtlasGenerator::operator()()
148{
149 Qt3DRender::QTextureImageDataPtr texImage = Qt3DRender::QTextureImageDataPtr::create();
150 texImage->setTarget(QOpenGLTexture::Target2D);
151 texImage->setWidth(m_data->width());
152 texImage->setHeight(m_data->height());
153 texImage->setDepth(1);
154 texImage->setFaces(1);
155 texImage->setLayers(1);
156 texImage->setMipLevels(1);
157 texImage->setFormat(static_cast<QOpenGLTexture::TextureFormat>(m_format));
158 texImage->setPixelFormat(m_pixelFormat);
159 texImage->setPixelType(QOpenGLTexture::UInt8);
160
161 const QByteArray bytes = m_data->createUpdatedImageData();
162 texImage->setData(data: bytes, blockSize: 1);
163
164 Qt3DRender::QTextureDataPtr generatedData = Qt3DRender::QTextureDataPtr::create();
165 generatedData->setTarget(Qt3DRender::QAbstractTexture::Target2D);
166 generatedData->setFormat(m_format);
167 generatedData->setWidth(m_data->width());
168 generatedData->setHeight(m_data->height());
169 generatedData->setDepth(1);
170 generatedData->setLayers(1);
171 generatedData->addImageData(imageData: texImage);
172
173 return generatedData;
174}
175
176bool QTextureAtlasGenerator::operator==(const QTextureGenerator &other) const
177{
178 const QTextureAtlasGenerator *otherFunctor = Qt3DRender::functor_cast<QTextureAtlasGenerator>(other: &other);
179 return (otherFunctor != nullptr
180 && otherFunctor->m_data == m_data
181 && otherFunctor->m_atlasId == m_atlasId
182 && otherFunctor->m_generation == m_generation);
183}
184
185QTextureAtlas::QTextureAtlas(Qt3DCore::QNode *parent)
186 : QAbstractTexture(*new QTextureAtlasPrivate(), parent)
187{
188}
189
190QOpenGLTexture::PixelFormat QTextureAtlas::pixelFormat() const
191{
192 Q_D(const QTextureAtlas);
193 return d->m_pixelFormat;
194}
195
196void QTextureAtlas::setPixelFormat(QOpenGLTexture::PixelFormat fmt)
197{
198 Q_D(QTextureAtlas);
199 d->m_pixelFormat = fmt;
200}
201
202QTextureAtlas::~QTextureAtlas()
203{
204}
205
206QTextureAtlas::TextureId QTextureAtlas::addImage(const QImage &image, int padding)
207{
208 Q_D(QTextureAtlas);
209
210 // lazily create image and allocator to allow setWidth/setHeight after object construction
211 if (!d->m_allocator) {
212 Q_ASSERT(d->m_data.isNull());
213
214 d->m_allocator.reset(other: new AreaAllocator(QSize(width(), height())));
215 d->m_data = QTextureAtlasDataPtr::create(arguments: width(), arguments: height(), arguments: image.format());
216 }
217
218 const QSize allocSz = image.size() + QSize(2 * padding, 2 * padding);
219
220 // try to allocate space within image space
221 const QRect alloc = d->m_allocator->allocate(size: allocSz);
222 if (alloc.isEmpty())
223 return InvalidTexture;
224
225 const QRect imgRect = alloc.adjusted(xp1: padding, yp1: padding, xp2: -padding, yp2: -padding);
226 AtlasTexture tex;
227 tex.position = imgRect;
228 tex.padding = padding;
229
230 // store texture
231 TextureId id = d->m_currId++;
232 d->m_textures[id] = tex;
233 d->m_data->addImage(texture: tex, image);
234
235 // update data functor
236 d->m_currGen++;
237 d->setDataFunctor(QTextureAtlasGeneratorPtr::create(arguments: d));
238
239 return id;
240}
241
242void QTextureAtlas::removeImage(TextureId id)
243{
244 Q_D(QTextureAtlas);
245 auto it = d->m_textures.find(akey: id);
246 if (it != d->m_textures.end()) {
247 QRect imgRect = it->position;
248 imgRect.adjust(dx1: -it->padding, dy1: -it->padding, dx2: 2*it->padding, dy2: 2*it->padding);
249
250 if (d->m_allocator)
251 d->m_allocator->deallocate(rect: imgRect);
252 d->m_textures.erase(it);
253 }
254}
255
256bool QTextureAtlas::hasImage(TextureId id) const
257{
258 Q_D(const QTextureAtlas);
259 return d->m_textures.contains(akey: id);
260}
261
262int QTextureAtlas::imageCount() const
263{
264 Q_D(const QTextureAtlas);
265 return d->m_textures.size();
266}
267
268QRect QTextureAtlas::imagePosition(TextureId id) const
269{
270 Q_D(const QTextureAtlas);
271 const auto it = d->m_textures.find(akey: id);
272 return (it != d->m_textures.cend()) ? it->position : QRect();
273}
274
275QRectF QTextureAtlas::imageTexCoords(TextureId id) const
276{
277 Q_D(const QTextureAtlas);
278 const auto it = d->m_textures.find(akey: id);
279 if (it != d->m_textures.cend()) {
280 const float w = d->m_data->width();
281 const float h = d->m_data->height();
282 return QRectF(static_cast<float>(it->position.x()) / w,
283 static_cast<float>(it->position.y()) / h,
284 static_cast<float>(it->position.width()) / w,
285 static_cast<float>(it->position.height()) / h);
286 }
287 return QRectF();
288}
289
290int QTextureAtlas::imagePadding(TextureId id) const
291{
292 Q_D(const QTextureAtlas);
293 const auto it = d->m_textures.find(akey: id);
294 return (it != d->m_textures.cend()) ? it->padding : -1;
295}
296
297} // namespace Qt3DExtras
298
299QT_END_NAMESPACE
300

source code of qt3d/src/extras/text/qtextureatlas.cpp