1 | // Copyright (C) 2019 Klaralvdalens Datakonsult AB (KDAB). |
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
3 | |
4 | /* |
5 | * Based on https://github.com/seanchas116/qtimgui/ |
6 | * |
7 | * MIT License https://github.com/seanchas116/qtimgui/blob/master/LICENSE |
8 | * |
9 | */ |
10 | |
11 | #include "imguirenderer_p.h" |
12 | #include <renderview_p.h> |
13 | #include <rendercommand_p.h> |
14 | #include <renderer_p.h> |
15 | #include <submissioncontext_p.h> |
16 | #include <Qt3DRender/private/geometryrenderermanager_p.h> |
17 | |
18 | #include <QDateTime> |
19 | #include <QGuiApplication> |
20 | #include <QMouseEvent> |
21 | #include <QClipboard> |
22 | #include <QCursor> |
23 | #include <QOpenGLExtraFunctions> |
24 | |
25 | #include "imgui.h" |
26 | |
27 | #ifndef GL_VERTEX_ARRAY_BINDING |
28 | // just for building on some platforms, won't run anyway as this requires GL/ES > 2 |
29 | #define GL_VERTEX_ARRAY_BINDING 0x85B5 |
30 | #endif |
31 | |
32 | QT_BEGIN_NAMESPACE |
33 | |
34 | namespace Qt3DRR = Qt3DRender::Render; |
35 | namespace Qt3DRRD = Qt3DRR::Debug; |
36 | |
37 | namespace { |
38 | |
39 | const QHash<int, ImGuiKey> keyMap = { |
40 | { Qt::Key_Tab, ImGuiKey_Tab }, |
41 | { Qt::Key_Left, ImGuiKey_LeftArrow }, |
42 | { Qt::Key_Right, ImGuiKey_RightArrow }, |
43 | { Qt::Key_Up, ImGuiKey_UpArrow }, |
44 | { Qt::Key_Down, ImGuiKey_DownArrow }, |
45 | { Qt::Key_PageUp, ImGuiKey_PageUp }, |
46 | { Qt::Key_PageDown, ImGuiKey_PageDown }, |
47 | { Qt::Key_Home, ImGuiKey_Home }, |
48 | { Qt::Key_End, ImGuiKey_End }, |
49 | { Qt::Key_Delete, ImGuiKey_Delete }, |
50 | { Qt::Key_Backspace, ImGuiKey_Backspace }, |
51 | { Qt::Key_Enter, ImGuiKey_Enter }, |
52 | { Qt::Key_Escape, ImGuiKey_Escape }, |
53 | { Qt::Key_A, ImGuiKey_A }, |
54 | { Qt::Key_C, ImGuiKey_C }, |
55 | { Qt::Key_V, ImGuiKey_V }, |
56 | { Qt::Key_X, ImGuiKey_X }, |
57 | { Qt::Key_Y, ImGuiKey_Y }, |
58 | { Qt::Key_Z, ImGuiKey_Z }, |
59 | }; |
60 | |
61 | QByteArray g_currentClipboardText; |
62 | |
63 | // doesn't handle primitive restart when using indexes |
64 | int vertexToPrimitiveCount(Qt3DRender::QGeometryRenderer::PrimitiveType primitiveType, int numVertices) { |
65 | int nPrimitives = 0; |
66 | switch (primitiveType) { |
67 | case Qt3DRender::QGeometryRenderer::Points: |
68 | case Qt3DRender::QGeometryRenderer::LineLoop: |
69 | nPrimitives += numVertices; |
70 | break; |
71 | case Qt3DRender::QGeometryRenderer::Triangles: |
72 | nPrimitives += numVertices / 3; |
73 | break; |
74 | case Qt3DRender::QGeometryRenderer::Lines: |
75 | nPrimitives += numVertices / 2; |
76 | break; |
77 | case Qt3DRender::QGeometryRenderer::TriangleFan: |
78 | case Qt3DRender::QGeometryRenderer::TriangleStrip: |
79 | case Qt3DRender::QGeometryRenderer::LineStrip: |
80 | nPrimitives += numVertices - 1; |
81 | break; |
82 | case Qt3DRender::QGeometryRenderer::TrianglesAdjacency: |
83 | nPrimitives += numVertices / 6; |
84 | break; |
85 | case Qt3DRender::QGeometryRenderer::TriangleStripAdjacency: |
86 | case Qt3DRender::QGeometryRenderer::LineStripAdjacency: |
87 | nPrimitives += numVertices / 2 - 1; |
88 | break; |
89 | case Qt3DRender::QGeometryRenderer::LinesAdjacency: |
90 | nPrimitives += numVertices / 4; |
91 | break; |
92 | case Qt3DRender::QGeometryRenderer::Patches: |
93 | nPrimitives += 1; |
94 | } |
95 | return nPrimitives; |
96 | } |
97 | |
98 | const char *primitiveTypeName(Qt3DRender::QGeometryRenderer::PrimitiveType primitiveType) { |
99 | switch (primitiveType) { |
100 | case Qt3DRender::QGeometryRenderer::Points: |
101 | return "Points" ; |
102 | case Qt3DRender::QGeometryRenderer::LineLoop: |
103 | return "LineLoop" ; |
104 | case Qt3DRender::QGeometryRenderer::Triangles: |
105 | return "Triangles" ; |
106 | case Qt3DRender::QGeometryRenderer::TrianglesAdjacency: |
107 | return "TriangleAdjacency" ; |
108 | case Qt3DRender::QGeometryRenderer::TriangleFan: |
109 | return "TriangleFan" ; |
110 | case Qt3DRender::QGeometryRenderer::TriangleStrip: |
111 | return "TriangleStrip" ; |
112 | case Qt3DRender::QGeometryRenderer::TriangleStripAdjacency: |
113 | return "TriangleStringAdjacency" ; |
114 | case Qt3DRender::QGeometryRenderer::LineStrip: |
115 | return "LineStrip" ; |
116 | case Qt3DRender::QGeometryRenderer::LineStripAdjacency: |
117 | return "LineStripAdjacency" ; |
118 | case Qt3DRender::QGeometryRenderer::Lines: |
119 | return "Lines" ; |
120 | case Qt3DRender::QGeometryRenderer::LinesAdjacency: |
121 | return "LinesAdjacency" ; |
122 | case Qt3DRender::QGeometryRenderer::Patches: |
123 | return "Patches" ; |
124 | } |
125 | return "" ; |
126 | } |
127 | } |
128 | |
129 | Qt3DRRD::ImGuiRenderer::ImGuiRenderer(Qt3DRR::OpenGL::Renderer *renderer) |
130 | : m_renderer(renderer) |
131 | { |
132 | ImGui::CreateContext(); |
133 | |
134 | ImGuiIO &io = ImGui::GetIO(); |
135 | |
136 | #ifndef QT_NO_CLIPBOARD |
137 | io.SetClipboardTextFn = [](void *user_data, const char *text) { |
138 | Q_UNUSED(user_data); |
139 | QGuiApplication::clipboard()->setText(QString::fromLatin1(ba: text)); |
140 | }; |
141 | io.GetClipboardTextFn = [](void *user_data) { |
142 | Q_UNUSED(user_data); |
143 | g_currentClipboardText = QGuiApplication::clipboard()->text().toUtf8(); |
144 | return static_cast<const char *>(g_currentClipboardText.data()); |
145 | }; |
146 | #endif |
147 | |
148 | std::fill(first: std::begin(arr&: m_fpsLog), last: std::end(arr&: m_fpsLog), value: 0.f); |
149 | std::fill(first: std::begin(arr&: m_jobsLog), last: std::end(arr&: m_jobsLog), value: 0.f); |
150 | m_fpsRange.first = m_fpsRange.second = 0.f; |
151 | m_jobsRange.first = m_jobsRange.second = 0.f; |
152 | } |
153 | |
154 | Qt3DRRD::ImGuiRenderer::~ImGuiRenderer() = default; |
155 | |
156 | void Qt3DRRD::ImGuiRenderer::renderDebugOverlay(const std::vector<Qt3DRR::OpenGL::RenderView *> &renderViews, const Qt3DRR::OpenGL::RenderView *renderView, int jobsInLastFrame) |
157 | { |
158 | if (!newFrame(renderView)) |
159 | return; |
160 | |
161 | const int renderViewsCount = int(renderViews.size()); |
162 | |
163 | int logIndex = qMin(IMGUI_PERF_LOG_SIZE - 1, b: ImGui::GetFrameCount()); |
164 | if (logIndex == IMGUI_PERF_LOG_SIZE - 1) { |
165 | std::rotate(first: std::begin(arr&: m_fpsLog), middle: std::begin(arr&: m_fpsLog) + 1, last: std::end(arr&: m_fpsLog)); |
166 | std::rotate(first: std::begin(arr&: m_jobsLog), middle: std::begin(arr&: m_jobsLog) + 1, last: std::end(arr&: m_jobsLog)); |
167 | } |
168 | m_fpsLog[logIndex] = ImGui::GetIO().Framerate; |
169 | m_fpsRange.first = m_fpsRange.second = 0.f; |
170 | for (float v: m_fpsLog) { |
171 | m_fpsRange.first = qMin(a: m_fpsRange.first, b: qMax(a: v - 5.f, b: 0.f)); |
172 | m_fpsRange.second = qMax(a: m_fpsRange.second, b: v + 2.f); |
173 | } |
174 | m_jobsLog[logIndex] = jobsInLastFrame; |
175 | m_jobsRange.first = m_jobsRange.second = 0.f; |
176 | for (float v: m_jobsLog) { |
177 | m_jobsRange.first = qMin(a: m_jobsRange.first, b: qMax(a: v - 5.f, b: 0.f)); |
178 | m_jobsRange.second = qMax(a: m_jobsRange.second, b: v + 2.f); |
179 | } |
180 | |
181 | { |
182 | ImGui::Begin(name: "Qt3D Profiling" ); |
183 | char caption[50]; |
184 | snprintf(s: caption, maxlen: sizeof(caption), format: "Avg %.3f ms/frame (%.1f FPS)" , static_cast<double>(1000.0f / ImGui::GetIO().Framerate), static_cast<double>(ImGui::GetIO().Framerate)); |
185 | ImGui::PlotLines(label: "FPS" , values: m_fpsLog, values_count: logIndex + 1, values_offset: 0, overlay_text: caption, scale_min: m_fpsRange.first, scale_max: m_fpsRange.second, graph_size: ImVec2(0, 80)); |
186 | ImGui::PlotHistogram(label: "Jobs" , values: m_jobsLog, values_count: logIndex + 1, values_offset: 0, overlay_text: nullptr, scale_min: m_jobsRange.first, scale_max: m_jobsRange.second, graph_size: ImVec2(0, 80)); |
187 | |
188 | int nCommands = 0; |
189 | int nVertices = 0; |
190 | int nPrimitives = 0; |
191 | QSet<HGeometryRenderer> inUseGeometries; |
192 | QSet<Qt3DCore::QNodeId> inUseTextures; |
193 | for (int j=0; j<renderViewsCount; j++) { |
194 | Qt3DRR::OpenGL::RenderView *rv = renderViews.at(n: j); |
195 | nCommands += rv->commandCount(); |
196 | rv->forEachCommand(func: [&](const Qt3DRR::OpenGL::RenderCommand &command) { |
197 | if (command.m_type != Qt3DRR::OpenGL::RenderCommand::Draw) |
198 | return; |
199 | nVertices += command.m_primitiveCount; |
200 | nPrimitives += vertexToPrimitiveCount(primitiveType: command.m_primitiveType, numVertices: command.m_primitiveCount); |
201 | inUseGeometries.insert(value: command.m_geometryRenderer); |
202 | const auto &textures = command.m_parameterPack.textures(); |
203 | for (const auto &ns: textures) |
204 | inUseTextures.insert(value: ns.nodeId); |
205 | }); |
206 | } |
207 | |
208 | auto columnNumber = [](int i) { |
209 | if (i == 0) |
210 | ImGui::Text(fmt: "--" ); |
211 | else |
212 | ImGui::Text(fmt: " %d" , i); |
213 | ImGui::NextColumn(); |
214 | }; |
215 | auto column2Numbers = [](int i, int of) { |
216 | if (of == 0) |
217 | ImGui::Text(fmt: "--" ); |
218 | else |
219 | ImGui::Text(fmt: " %d of %d" , i, of); |
220 | ImGui::NextColumn(); |
221 | }; |
222 | |
223 | ImGui::Columns(count: 5); |
224 | ImGui::Separator(); |
225 | for (auto s: {"Jobs" , "RV" , "Cmds" , "Verts" , "Prims" }) { |
226 | ImGui::Text(fmt: "#%s" , s); |
227 | ImGui::NextColumn(); |
228 | } |
229 | for (auto s: {jobsInLastFrame, renderViewsCount, nCommands, nVertices, nPrimitives}) |
230 | columnNumber(s); |
231 | |
232 | ImGui::Columns(count: 3); |
233 | ImGui::Separator(); |
234 | for (auto s: {"Entities" , "Geometries" , "Textures" }) { |
235 | ImGui::Text(fmt: "#%s" , s); |
236 | ImGui::NextColumn(); |
237 | } |
238 | columnNumber(m_renderer->nodeManagers()->renderNodesManager()->count()); |
239 | column2Numbers(inUseGeometries.size(), m_renderer->nodeManagers()->geometryRendererManager()->count()); |
240 | column2Numbers(inUseTextures.size(), m_renderer->nodeManagers()->textureManager()->count()); |
241 | |
242 | ImGui::Columns(count: 1); |
243 | ImGui::Separator(); |
244 | |
245 | bool pj = m_renderer->services()->systemInformation()->isTraceEnabled(); |
246 | ImGui::AlignTextToFramePadding(); |
247 | ImGui::Text(fmt: "Profiling: " ); |
248 | ImGui::SameLine(); |
249 | if (ImGui::Checkbox(label: "Jobs" , v: &pj)) |
250 | QMetaObject::invokeMethod(obj: m_renderer->services()->systemInformation(), member: "setTraceEnabled" , c: Qt::QueuedConnection, Q_ARG(bool, pj)); |
251 | ImGui::SameLine(); |
252 | if (ImGui::Button(label: "Reveal" )) |
253 | QMetaObject::invokeMethod(obj: m_renderer->services()->systemInformation(), member: "revealLogFolder" , c: Qt::QueuedConnection); |
254 | |
255 | ImGui::AlignTextToFramePadding(); |
256 | ImGui::Text(fmt: "Show:" ); |
257 | ImGui::SameLine(); |
258 | if (ImGui::Button(label: "GL Info" )) |
259 | m_showGLInfoWindow = !m_showGLInfoWindow; |
260 | ImGui::SameLine(); |
261 | if (ImGui::Button(label: "Render Views" )) |
262 | m_showRenderDetailsWindow = !m_showRenderDetailsWindow; |
263 | |
264 | ImGui::AlignTextToFramePadding(); |
265 | ImGui::Text(fmt: "Dump:" ); |
266 | ImGui::SameLine(); |
267 | if (ImGui::Button(label: "SceneGraph##1" )) |
268 | QMetaObject::invokeMethod(obj: m_renderer->services()->systemInformation(), member: "dumpCommand" , |
269 | c: Qt::QueuedConnection, Q_ARG(QString, QLatin1String("render scenegraph" ))); |
270 | ImGui::SameLine(); |
271 | if (ImGui::Button(label: "FrameGraph##1" )) |
272 | QMetaObject::invokeMethod(obj: m_renderer->services()->systemInformation(), member: "dumpCommand" , |
273 | c: Qt::QueuedConnection, Q_ARG(QString, QLatin1String("render framegraph" ))); |
274 | ImGui::SameLine(); |
275 | if (ImGui::Button(label: "Render Views##1" )) |
276 | QMetaObject::invokeMethod(obj: m_renderer->services()->systemInformation(), member: "dumpCommand" , |
277 | c: Qt::QueuedConnection, Q_ARG(QString, QLatin1String("render framepaths" ))); |
278 | |
279 | ImGui::AlignTextToFramePadding(); |
280 | ImGui::Text(fmt: " " ); |
281 | ImGui::SameLine(); |
282 | if (ImGui::Button(label: "Filter State##1" )) |
283 | QMetaObject::invokeMethod(obj: m_renderer->services()->systemInformation(), member: "dumpCommand" , |
284 | c: Qt::QueuedConnection, Q_ARG(QString, QLatin1String("render filterstates" ))); |
285 | ImGui::SameLine(); |
286 | if (ImGui::Button(label: "JobsGraph##1" )) |
287 | QMetaObject::invokeMethod(obj: m_renderer->services()->systemInformation(), member: "dumpCommand" , |
288 | c: Qt::QueuedConnection, Q_ARG(QString, QLatin1String("dump jobs" ))); |
289 | |
290 | ImGui::End(); |
291 | |
292 | if (m_showGLInfoWindow) |
293 | showGLInfo(); |
294 | if (m_showRenderDetailsWindow) |
295 | showRenderDetails(renderViews); |
296 | } |
297 | |
298 | ImGui::Render(); |
299 | renderDrawList(draw_data: ImGui::GetDrawData()); |
300 | } |
301 | |
302 | void Qt3DRRD::ImGuiRenderer::setCapabilities(const QString &capabilities) |
303 | { |
304 | m_capabilities = capabilities.toLatin1(); |
305 | } |
306 | |
307 | void Qt3DRRD::ImGuiRenderer::showGLInfo() |
308 | { |
309 | ImGui::Begin(name: "Open GL Details" , p_open: &m_showGLInfoWindow); |
310 | ImGui::Text(fmt: "%s" , m_capabilities.data()); |
311 | ImGui::End(); |
312 | } |
313 | |
314 | void Qt3DRRD::ImGuiRenderer::showRenderDetails(const std::vector<Qt3DRR::OpenGL::RenderView *> &renderViews) |
315 | { |
316 | ImGui::Begin(name: "Render Views" , p_open: &m_showRenderDetailsWindow); |
317 | |
318 | int i = 1; |
319 | for (const Qt3DRR::OpenGL::RenderView *view : renderViews) { |
320 | QString label(QLatin1String("View " ) + QString::number(i++)); |
321 | if (ImGui::TreeNode(label: label.toLatin1().data())) { |
322 | ImGui::Text(fmt: "Viewport: (%.1f, %.1f, %.1f, %.1f)" , view->viewport().x(), view->viewport().y(), |
323 | view->viewport().width(), view->viewport().height()); |
324 | ImGui::Text(fmt: "Surface Size: (%d, %d)" , view->surfaceSize().width(), view->surfaceSize().height()); |
325 | ImGui::Text(fmt: "Pixel Ratio: %.1f" , view->devicePixelRatio()); |
326 | ImGui::Text(fmt: "No Draw: %s" , view->noDraw() ? "TRUE" : "FALSE" ); |
327 | ImGui::Text(fmt: "Frustum Culling: %s" , view->frustumCulling() ? "TRUE" : "FALSE" ); |
328 | ImGui::Text(fmt: "Compute: %s" , view->isCompute() ? "TRUE" : "FALSE" ); |
329 | ImGui::Text(fmt: "Clear Depth Value: %f" , static_cast<double>(view->clearDepthValue())); |
330 | ImGui::Text(fmt: "Clear Stencil Value: %d" , view->clearStencilValue()); |
331 | int j = 1; |
332 | |
333 | view->forEachCommand(func: [&](const Qt3DRR::OpenGL::RenderCommand &command) { |
334 | GeometryRenderer *rGeometryRenderer = m_renderer->nodeManagers()->data<GeometryRenderer, GeometryRendererManager>(handle: command.m_geometryRenderer); |
335 | QString label = QString(QLatin1String("Command %1 {%2}" )).arg(args: QString::number(j++), args: QString::number(rGeometryRenderer->peerId().id())); |
336 | if (ImGui::TreeNode(label: label.toLatin1().data())) { |
337 | ImGui::Text(fmt: "Primitive Type: %s %s" , primitiveTypeName(primitiveType: command.m_primitiveType), |
338 | command.m_drawIndexed ? "(indexed)" : "" ); |
339 | ImGui::Text(fmt: "# Vertices: %d" , command.m_primitiveCount); |
340 | ImGui::Text(fmt: "# Primitives: %d" , vertexToPrimitiveCount(primitiveType: command.m_primitiveType, numVertices: command.m_primitiveCount)); |
341 | ImGui::Text(fmt: "# Instances: %d" , command.m_instanceCount); |
342 | ImGui::TreePop(); |
343 | } |
344 | }); |
345 | ImGui::TreePop(); |
346 | ImGui::Separator(); |
347 | } |
348 | } |
349 | |
350 | if (ImGui::Button(label: "Dump" )) |
351 | QMetaObject::invokeMethod(obj: m_renderer->services()->systemInformation(), member: "dumpCommand" , |
352 | c: Qt::QueuedConnection, Q_ARG(QString, QLatin1String("render rendercommands" ))); |
353 | ImGui::End(); |
354 | } |
355 | |
356 | void Qt3DRRD::ImGuiRenderer::renderDrawList(ImDrawData *draw_data) |
357 | { |
358 | // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates) |
359 | ImGuiIO& io = ImGui::GetIO(); |
360 | int fb_width = int(io.DisplaySize.x * io.DisplayFramebufferScale.x); |
361 | int fb_height = int(io.DisplaySize.y * io.DisplayFramebufferScale.y); |
362 | if (fb_width == 0 || fb_height == 0) |
363 | return; |
364 | draw_data->ScaleClipRects(fb_scale: io.DisplayFramebufferScale); |
365 | |
366 | // Backup GL state |
367 | GLint last_active_texture; m_funcs->glGetIntegerv(GL_ACTIVE_TEXTURE, params: &last_active_texture); |
368 | m_funcs->glActiveTexture(GL_TEXTURE0); |
369 | GLint last_program; m_funcs->glGetIntegerv(GL_CURRENT_PROGRAM, params: &last_program); |
370 | GLint last_texture; m_funcs->glGetIntegerv(GL_TEXTURE_BINDING_2D, params: &last_texture); |
371 | GLint last_array_buffer; m_funcs->glGetIntegerv(GL_ARRAY_BUFFER_BINDING, params: &last_array_buffer); |
372 | GLint last_element_array_buffer; m_funcs->glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, params: &last_element_array_buffer); |
373 | GLint last_vertex_array; m_funcs->glGetIntegerv(GL_VERTEX_ARRAY_BINDING, params: &last_vertex_array); |
374 | GLint last_blend_src_rgb; m_funcs->glGetIntegerv(GL_BLEND_SRC_RGB, params: &last_blend_src_rgb); |
375 | GLint last_blend_dst_rgb; m_funcs->glGetIntegerv(GL_BLEND_DST_RGB, params: &last_blend_dst_rgb); |
376 | GLint last_blend_src_alpha; m_funcs->glGetIntegerv(GL_BLEND_SRC_ALPHA, params: &last_blend_src_alpha); |
377 | GLint last_blend_dst_alpha; m_funcs->glGetIntegerv(GL_BLEND_DST_ALPHA, params: &last_blend_dst_alpha); |
378 | GLint last_blend_equation_rgb; m_funcs->glGetIntegerv(GL_BLEND_EQUATION_RGB, params: &last_blend_equation_rgb); |
379 | GLint last_blend_equation_alpha; m_funcs->glGetIntegerv(GL_BLEND_EQUATION_ALPHA, params: &last_blend_equation_alpha); |
380 | GLint last_viewport[4]; m_funcs->glGetIntegerv(GL_VIEWPORT, params: last_viewport); |
381 | GLint last_scissor_box[4]; m_funcs->glGetIntegerv(GL_SCISSOR_BOX, params: last_scissor_box); |
382 | GLboolean last_enable_blend = m_funcs->glIsEnabled(GL_BLEND); |
383 | GLboolean last_enable_cull_face = m_funcs->glIsEnabled(GL_CULL_FACE); |
384 | GLboolean last_enable_depth_test = m_funcs->glIsEnabled(GL_DEPTH_TEST); |
385 | GLboolean last_enable_scissor_test = m_funcs->glIsEnabled(GL_SCISSOR_TEST); |
386 | |
387 | // Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled |
388 | m_funcs->glEnable(GL_BLEND); |
389 | m_funcs->glBlendEquation(GL_FUNC_ADD); |
390 | m_funcs->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
391 | m_funcs->glDisable(GL_CULL_FACE); |
392 | m_funcs->glDisable(GL_DEPTH_TEST); |
393 | m_funcs->glEnable(GL_SCISSOR_TEST); |
394 | |
395 | // Setup viewport, orthographic projection matrix |
396 | m_funcs->glViewport(x: 0, y: 0, width: static_cast<GLsizei>(fb_width), height: static_cast<GLsizei>(fb_height)); |
397 | const float ortho_projection[4][4] = { |
398 | { 2.0f/io.DisplaySize.x, 0.0f, 0.0f, 0.0f }, |
399 | { 0.0f, 2.0f/-io.DisplaySize.y, 0.0f, 0.0f }, |
400 | { 0.0f, 0.0f, -1.0f, 0.0f }, |
401 | {-1.0f, 1.0f, 0.0f, 1.0f }, |
402 | }; |
403 | m_funcs->glUseProgram(program: m_shaderHandle); |
404 | m_funcs->glUniform1i(location: m_attribLocationTex, x: 0); |
405 | m_funcs->glUniformMatrix4fv(location: m_attribLocationProjMtx, count: 1, GL_FALSE, value: &ortho_projection[0][0]); |
406 | m_funcs->glBindVertexArray(array: m_vaoHandle); |
407 | |
408 | for (int n = 0; n < draw_data->CmdListsCount; n++) { |
409 | const ImDrawList* cmd_list = draw_data->CmdLists[n]; |
410 | const ImDrawIdx* idx_buffer_offset = nullptr; |
411 | |
412 | m_funcs->glBindBuffer(GL_ARRAY_BUFFER, buffer: m_vboHandle); |
413 | m_funcs->glBufferData(GL_ARRAY_BUFFER, size: static_cast<GLsizeiptr>(cmd_list->VtxBuffer.Size) * sizeof(ImDrawVert), data: static_cast<const GLvoid*>(cmd_list->VtxBuffer.Data), GL_STREAM_DRAW); |
414 | |
415 | m_funcs->glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer: m_elementsHandle); |
416 | m_funcs->glBufferData(GL_ELEMENT_ARRAY_BUFFER, size: static_cast<GLsizeiptr>(cmd_list->IdxBuffer.Size) * sizeof(ImDrawIdx), data: static_cast<const GLvoid*>(cmd_list->IdxBuffer.Data), GL_STREAM_DRAW); |
417 | |
418 | for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++) { |
419 | const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i]; |
420 | if (pcmd->UserCallback) { |
421 | pcmd->UserCallback(cmd_list, pcmd); |
422 | } else { |
423 | m_funcs->glBindTexture(GL_TEXTURE_2D, texture: (GLuint)(intptr_t)pcmd->TextureId); |
424 | m_funcs->glScissor(x: static_cast<int>(pcmd->ClipRect.x), y: static_cast<int>(fb_height - pcmd->ClipRect.w), |
425 | width: static_cast<int>(pcmd->ClipRect.z - pcmd->ClipRect.x), height: static_cast<int>(pcmd->ClipRect.w - pcmd->ClipRect.y)); |
426 | m_funcs->glDrawElements(GL_TRIANGLES, count: static_cast<GLsizei>(pcmd->ElemCount), type: sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, indices: idx_buffer_offset); |
427 | } |
428 | idx_buffer_offset += pcmd->ElemCount; |
429 | } |
430 | } |
431 | |
432 | // Restore modified GL state |
433 | m_funcs->glUseProgram(program: last_program); |
434 | m_funcs->glBindTexture(GL_TEXTURE_2D, texture: last_texture); |
435 | m_funcs->glActiveTexture(texture: last_active_texture); |
436 | m_funcs->glBindVertexArray(array: last_vertex_array); |
437 | m_funcs->glBindBuffer(GL_ARRAY_BUFFER, buffer: last_array_buffer); |
438 | m_funcs->glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer: last_element_array_buffer); |
439 | m_funcs->glBlendEquationSeparate(modeRGB: last_blend_equation_rgb, modeAlpha: last_blend_equation_alpha); |
440 | m_funcs->glBlendFuncSeparate(srcRGB: last_blend_src_rgb, dstRGB: last_blend_dst_rgb, srcAlpha: last_blend_src_alpha, dstAlpha: last_blend_dst_alpha); |
441 | if (last_enable_blend) |
442 | m_funcs->glEnable(GL_BLEND); else m_funcs->glDisable(GL_BLEND); |
443 | if (last_enable_cull_face) |
444 | m_funcs->glEnable(GL_CULL_FACE); else m_funcs->glDisable(GL_CULL_FACE); |
445 | if (last_enable_depth_test) |
446 | m_funcs->glEnable(GL_DEPTH_TEST); else m_funcs->glDisable(GL_DEPTH_TEST); |
447 | if (last_enable_scissor_test) |
448 | m_funcs->glEnable(GL_SCISSOR_TEST); else m_funcs->glDisable(GL_SCISSOR_TEST); |
449 | m_funcs->glViewport(x: last_viewport[0], y: last_viewport[1], width: static_cast<GLsizei>(last_viewport[2]), height: static_cast<GLsizei>(last_viewport[3])); |
450 | m_funcs->glScissor(x: last_scissor_box[0], y: last_scissor_box[1], width: static_cast<GLsizei>(last_scissor_box[2]), height: static_cast<GLsizei>(last_scissor_box[3])); |
451 | } |
452 | |
453 | bool Qt3DRRD::ImGuiRenderer::createFontsTexture() |
454 | { |
455 | // Build texture atlas |
456 | ImGuiIO& io = ImGui::GetIO(); |
457 | unsigned char* pixels; |
458 | int width, height; |
459 | io.Fonts->GetTexDataAsRGBA32(out_pixels: &pixels, out_width: &width, out_height: &height); // Load as RGBA 32-bits (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory. |
460 | |
461 | // Upload texture to graphics system |
462 | GLint last_texture; |
463 | m_funcs->glGetIntegerv(GL_TEXTURE_BINDING_2D, params: &last_texture); |
464 | m_funcs->glGenTextures(n: 1, textures: &m_fontTexture); |
465 | m_funcs->glBindTexture(GL_TEXTURE_2D, texture: m_fontTexture); |
466 | m_funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
467 | m_funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
468 | m_funcs->glTexImage2D(GL_TEXTURE_2D, level: 0, GL_RGBA, width, height, border: 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels); |
469 | |
470 | // Store our identifier |
471 | io.Fonts->TexID = (void *)(intptr_t)m_fontTexture; |
472 | |
473 | // Restore state |
474 | m_funcs->glBindTexture(GL_TEXTURE_2D, texture: last_texture); |
475 | |
476 | return true; |
477 | } |
478 | |
479 | bool Qt3DRRD::ImGuiRenderer::createDeviceObjects() |
480 | { |
481 | auto *glContext = m_renderer->submissionContext()->openGLContext(); |
482 | if (glContext->format().majorVersion() < 3) { |
483 | qWarning() << "Qt3D Profiling overlay requires GL or GL ES >= 3" ; |
484 | return false; |
485 | } |
486 | |
487 | // Backup GL state |
488 | GLint last_texture, last_array_buffer, last_vertex_array; |
489 | m_funcs->glGetIntegerv(GL_TEXTURE_BINDING_2D, params: &last_texture); |
490 | m_funcs->glGetIntegerv(GL_ARRAY_BUFFER_BINDING, params: &last_array_buffer); |
491 | m_funcs->glGetIntegerv(GL_VERTEX_ARRAY_BINDING, params: &last_vertex_array); |
492 | |
493 | const GLchar *vertex_shader = |
494 | "#version 330\n" |
495 | "uniform mat4 ProjMtx;\n" |
496 | "in vec2 Position;\n" |
497 | "in vec2 UV;\n" |
498 | "in vec4 Color;\n" |
499 | "out vec2 Frag_UV;\n" |
500 | "out vec4 Frag_Color;\n" |
501 | "void main()\n" |
502 | "{\n" |
503 | " Frag_UV = UV;\n" |
504 | " Frag_Color = Color;\n" |
505 | " gl_Position = ProjMtx * vec4(Position.xy, 0, 1);\n" |
506 | "}\n" ; |
507 | |
508 | const GLchar* fragment_shader = |
509 | "#version 330\n" |
510 | "uniform sampler2D Texture;\n" |
511 | "in vec2 Frag_UV;\n" |
512 | "in vec4 Frag_Color;\n" |
513 | "out vec4 Out_Color;\n" |
514 | "void main()\n" |
515 | "{\n" |
516 | " Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n" |
517 | "}\n" ; |
518 | |
519 | const GLchar *vertex_shader_es3 = |
520 | "#version 300 es\n" |
521 | "uniform mat4 ProjMtx;\n" |
522 | "in vec2 Position;\n" |
523 | "in vec2 UV;\n" |
524 | "in vec4 Color;\n" |
525 | "out vec2 Frag_UV;\n" |
526 | "out vec4 Frag_Color;\n" |
527 | "void main()\n" |
528 | "{\n" |
529 | " Frag_UV = UV;\n" |
530 | " Frag_Color = Color;\n" |
531 | " gl_Position = ProjMtx * vec4(Position.xy, 0, 1);\n" |
532 | "}\n" ; |
533 | |
534 | const GLchar* fragment_shader_es3 = |
535 | "#version 300 es\n" |
536 | "precision highp float;\n" |
537 | "uniform sampler2D Texture;\n" |
538 | "in vec2 Frag_UV;\n" |
539 | "in vec4 Frag_Color;\n" |
540 | "out vec4 Out_Color;\n" |
541 | "void main()\n" |
542 | "{\n" |
543 | " Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n" |
544 | "}\n" ; |
545 | |
546 | QString logs; |
547 | m_shader = new QOpenGLShaderProgram(this); |
548 | if (glContext->isOpenGLES()) { |
549 | if (!m_shader->addShaderFromSourceCode(type: QOpenGLShader::Vertex, source: vertex_shader_es3)) |
550 | logs += m_shader->log(); |
551 | if (!m_shader->addShaderFromSourceCode(type: QOpenGLShader::Fragment, source: fragment_shader_es3)) |
552 | logs += m_shader->log(); |
553 | } else { |
554 | if (!m_shader->addShaderFromSourceCode(type: QOpenGLShader::Vertex, source: vertex_shader)) |
555 | logs += m_shader->log(); |
556 | if (!m_shader->addShaderFromSourceCode(type: QOpenGLShader::Fragment, source: fragment_shader)) |
557 | logs += m_shader->log(); |
558 | } |
559 | m_shader->link(); |
560 | logs += m_shader->log(); |
561 | if (!logs.isEmpty()) |
562 | qWarning() << logs; |
563 | m_shaderHandle = m_shader->programId(); |
564 | |
565 | m_attribLocationTex = m_funcs->glGetUniformLocation(program: m_shaderHandle, name: "Texture" ); |
566 | m_attribLocationProjMtx = m_funcs->glGetUniformLocation(program: m_shaderHandle, name: "ProjMtx" ); |
567 | m_attribLocationPosition = m_funcs->glGetAttribLocation(program: m_shaderHandle, name: "Position" ); |
568 | m_attribLocationUV = m_funcs->glGetAttribLocation(program: m_shaderHandle, name: "UV" ); |
569 | m_attribLocationColor = m_funcs->glGetAttribLocation(program: m_shaderHandle, name: "Color" ); |
570 | |
571 | m_funcs->glGenBuffers(n: 1, buffers: &m_vboHandle); |
572 | m_funcs->glGenBuffers(n: 1, buffers: &m_elementsHandle); |
573 | |
574 | m_funcs->glGenVertexArrays(n: 1, arrays: &m_vaoHandle); |
575 | m_funcs->glBindVertexArray(array: m_vaoHandle); |
576 | m_funcs->glBindBuffer(GL_ARRAY_BUFFER, buffer: m_vboHandle); |
577 | m_funcs->glEnableVertexAttribArray(index: m_attribLocationPosition); |
578 | m_funcs->glEnableVertexAttribArray(index: m_attribLocationUV); |
579 | m_funcs->glEnableVertexAttribArray(index: m_attribLocationColor); |
580 | |
581 | #define OFFSETOF(TYPE, ELEMENT) (reinterpret_cast<size_t>(&((static_cast<TYPE *>(nullptr))->ELEMENT))) |
582 | m_funcs->glVertexAttribPointer(indx: m_attribLocationPosition, size: 2, GL_FLOAT, GL_FALSE, stride: sizeof(ImDrawVert), ptr: reinterpret_cast<GLvoid*>(OFFSETOF(ImDrawVert, pos))); |
583 | m_funcs->glVertexAttribPointer(indx: m_attribLocationUV, size: 2, GL_FLOAT, GL_FALSE, stride: sizeof(ImDrawVert), ptr: reinterpret_cast<GLvoid*>(OFFSETOF(ImDrawVert, uv))); |
584 | m_funcs->glVertexAttribPointer(indx: m_attribLocationColor, size: 4, GL_UNSIGNED_BYTE, GL_TRUE, stride: sizeof(ImDrawVert), ptr: reinterpret_cast<GLvoid*>(OFFSETOF(ImDrawVert, col))); |
585 | #undef OFFSETOF |
586 | |
587 | createFontsTexture(); |
588 | |
589 | // Restore modified GL state |
590 | m_funcs->glBindTexture(GL_TEXTURE_2D, texture: last_texture); |
591 | m_funcs->glBindBuffer(GL_ARRAY_BUFFER, buffer: last_array_buffer); |
592 | m_funcs->glBindVertexArray(array: last_vertex_array); |
593 | |
594 | return true; |
595 | } |
596 | |
597 | bool Qt3DRRD::ImGuiRenderer::newFrame(const Qt3DRR::OpenGL::RenderView *renderView) |
598 | { |
599 | if (!m_funcs) |
600 | m_funcs = m_renderer->submissionContext()->openGLContext()->extraFunctions(); |
601 | if (!m_fontTexture) |
602 | createDeviceObjects(); |
603 | if (!m_shader) |
604 | return false; |
605 | |
606 | ImGuiIO& io = ImGui::GetIO(); |
607 | |
608 | // Setup display size (every frame to accommodate for window resizing) |
609 | io.DisplaySize = ImVec2(renderView->surfaceSize().width() / renderView->devicePixelRatio(), renderView->surfaceSize().height() / renderView->devicePixelRatio()); |
610 | io.DisplayFramebufferScale = ImVec2(renderView->devicePixelRatio(), renderView->devicePixelRatio()); |
611 | |
612 | // Setup time step |
613 | double current_time = QDateTime::currentMSecsSinceEpoch() / 1000.; |
614 | io.DeltaTime = m_time > 0.0 ? static_cast<float>(current_time - m_time) : 1.0f / 60.0f; |
615 | if (io.DeltaTime == 0.f) |
616 | io.DeltaTime = 1.0f / 60.0f; |
617 | m_time = current_time; |
618 | |
619 | // Setup inputs |
620 | for (int i = 0; i < 3; i++) |
621 | io.MouseDown[i] = m_mousePressed[i]; |
622 | |
623 | io.MouseWheelH = m_mouseWheelH; |
624 | io.MouseWheel = m_mouseWheel; |
625 | m_mouseWheelH = 0; |
626 | m_mouseWheel = 0; |
627 | |
628 | // Start the frame |
629 | ImGui::NewFrame(); |
630 | return true; |
631 | } |
632 | |
633 | void Qt3DRRD::ImGuiRenderer::onMouseChange(QMouseEvent *event) |
634 | { |
635 | ImGuiIO& io = ImGui::GetIO(); |
636 | io.MousePos = ImVec2(event->pos().x(), event->pos().y()); |
637 | m_mousePressed[0] = event->buttons() & Qt::LeftButton; |
638 | m_mousePressed[1] = event->buttons() & Qt::RightButton; |
639 | m_mousePressed[2] = event->buttons() & Qt::MiddleButton; |
640 | } |
641 | |
642 | void Qt3DRRD::ImGuiRenderer::onWheel(QWheelEvent *event) |
643 | { |
644 | // 5 lines per unit |
645 | m_mouseWheelH += event->pixelDelta().x() / (ImGui::GetTextLineHeight()); |
646 | m_mouseWheel += event->pixelDelta().y() / (5.f * ImGui::GetTextLineHeight()); |
647 | } |
648 | |
649 | void Qt3DRRD::ImGuiRenderer::onKeyPressRelease(QKeyEvent *event) |
650 | { |
651 | ImGuiIO& io = ImGui::GetIO(); |
652 | if (keyMap.contains(key: event->key())) |
653 | io.AddKeyEvent(key: keyMap[event->key()], down: event->type() == QEvent::KeyPress); |
654 | |
655 | if (event->type() == QEvent::KeyPress) { |
656 | QString text = event->text(); |
657 | if (text.size() == 1) |
658 | io.AddInputCharacter(c: static_cast<ImWchar>(text.at(i: 0).unicode())); |
659 | } |
660 | |
661 | #ifdef Q_OS_DARWIN |
662 | io.KeyCtrl = event->modifiers() & Qt::MetaModifier; |
663 | io.KeyShift = event->modifiers() & Qt::ShiftModifier; |
664 | io.KeyAlt = event->modifiers() & Qt::AltModifier; |
665 | io.KeySuper = event->modifiers() & Qt::ControlModifier; // Command key |
666 | #else |
667 | io.KeyCtrl = event->modifiers() & Qt::ControlModifier; |
668 | io.KeyShift = event->modifiers() & Qt::ShiftModifier; |
669 | io.KeyAlt = event->modifiers() & Qt::AltModifier; |
670 | io.KeySuper = event->modifiers() & Qt::MetaModifier; |
671 | #endif |
672 | } |
673 | |
674 | void Qt3DRRD::ImGuiRenderer::processEvent(QEvent *event) |
675 | { |
676 | switch (event->type()) { |
677 | case QEvent::MouseMove: |
678 | case QEvent::MouseButtonPress: |
679 | case QEvent::MouseButtonRelease: |
680 | this->onMouseChange(event: static_cast<QMouseEvent *>(event)); |
681 | break; |
682 | case QEvent::Wheel: |
683 | this->onWheel(event: static_cast<QWheelEvent *>(event)); |
684 | break; |
685 | case QEvent::KeyPress: |
686 | case QEvent::KeyRelease: |
687 | this->onKeyPressRelease(event: static_cast<QKeyEvent *>(event)); |
688 | break; |
689 | default: |
690 | break; |
691 | } |
692 | } |
693 | |
694 | QT_END_NAMESPACE |
695 | |