X-Git-Url: https://git.ralfj.de/gltest.git/blobdiff_plain/a6ec94bcb6af26bc9b6483b89a8b2397a9c8bef9..14716b59eedd024453c5d904a619d63a0f0fed85:/gltest.cpp diff --git a/gltest.cpp b/gltest.cpp index ff413af..feb794f 100644 --- a/gltest.cpp +++ b/gltest.cpp @@ -1,3 +1,21 @@ +/* gltest - small OpenGL tearing test program + * Copyright (C) 2012-2013 Ralf Jung + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + // stdlib includes #include #include @@ -34,8 +52,8 @@ static const GLfloat boxWidth = 0.045f; static const GLfloat boxSpeed = 1.25f; // per second // profiler -enum ProfilerState { statePreRender, stateClear, stateDraw, statePresent, statePostRender, stateOutsideRender, numProfilerStates }; -static const char *profilerStateNames[numProfilerStates] = { "Pre-Render", "Clearing", "Drawing", "Presenting", "Post-Render", "Outside renderer"}; +enum ProfilerState { StatePreRender, StateClear, StateDraw, StatePresent, StatePostRender, StateOutsideRender, NumProfilerStates }; +static const char *profilerStateNames[NumProfilerStates] = { "Pre-Render", "Clearing", "Drawing", "Presenting", "Post-Render", "Outside renderer"}; // utility functions static double getTime() @@ -45,15 +63,19 @@ static double getTime() return tp.tv_sec + 1e-9 * tp.tv_nsec; } -static void drawRect(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2) +static void rectQuad(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2) { - glVertex2f(x1, y1); glVertex2f(x2, y1); glVertex2f(x2, y2); glVertex2f(x1, y2); + glVertex2f(x1, y1); + glVertex2f(x2, y1); + glVertex2f(x2, y2); + glVertex2f(x1, y2); } // the window class TearTestWindow : public GLWindow { public: - TearTestWindow(bool overdraw, bool copy) : GLWindow(XOpenDisplay(0), createGLBackend()), overdraw(overdraw), copy(copy), boxPos(0), boxDirection(1) + TearTestWindow(bool overdraw, bool copy, int sleep_time) : GLWindow(XOpenDisplay(0), createGLBackend()), + overdraw(overdraw), copy(copy), sleep_time(sleep_time), boxPos(0), boxDirection(1) {} void setSwapInterval(int i) { @@ -71,29 +93,30 @@ protected: // initailize profiler framect = 0; memset(stateTime, 0, sizeof(stateTime)); - curState = -1; + curState = NumProfilerStates; lastDisplay = lastProfile = getTime(); } virtual void resizeGL(unsigned int width, unsigned int height) { - /* prevent divide-by-zero */ - if (height == 0) - height = 1; + // prevent divide-by-zero + if (height == 0) + height = 1; glViewport(0, 0, width, height); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); glOrtho (0, 1, 1, 0, 0, 1); - glMatrixMode(GL_MODELVIEW); - glClear(GL_COLOR_BUFFER_BIT); + glMatrixMode(GL_MODELVIEW); + glClearColor(0.0f, 0.0f, 0.0f, 0.0f); + glClear(GL_COLOR_BUFFER_BIT); glFlush(); } void profilerTick(ProfilerState nextState) { - assert (nextState >= 0 && nextState < numProfilerStates); + assert (nextState >= 0 && nextState < NumProfilerStates); double time = getTime(); - if (curState >= 0) + if (curState >= 0 && curState < NumProfilerStates) stateTime[curState] += time-lastProfile; curState = nextState; lastProfile = time; @@ -101,7 +124,7 @@ protected: const double elapsed = time-lastDisplay; if (elapsed >= 3) { printf("%.1f fps, time spent: ", framect/elapsed); - for (int i = 0; i < numProfilerStates; ++i) { + for (int i = 0; i < NumProfilerStates; ++i) { if (i != 0) printf(", "); printf("%s %.1f%%", profilerStateNames[i], stateTime[i]/elapsed*100); } @@ -115,7 +138,7 @@ protected: void renderGL() { ////////////////////////////////////////////// - profilerTick(statePreRender); + profilerTick(StatePreRender); double time = getTime(); // anim double passedTime = time-lastFrame; @@ -132,25 +155,26 @@ protected: } lastFrame = time; ////////////////////////////////////////////// - profilerTick(stateClear); + profilerTick(StateClear); if (overdraw) { // clear manually glBegin(GL_QUADS); glColor3f(0.0f, 0.0f, 0.0f); - drawRect(0, 0, 1, 1); + rectQuad(0, 0, 1, 1); glEnd(); } else { glClear(GL_COLOR_BUFFER_BIT); } ////////////////////////////////////////////// - profilerTick(stateDraw); + profilerTick(StateDraw); glBegin(GL_QUADS); glColor3f(0.8f, 1.0f, 0.75f); - drawRect(boxPos, 0, boxPos+boxWidth, 1); + rectQuad(boxPos, 0, boxPos+boxWidth, 1); glEnd(); + usleep(sleep_time*1000); ////////////////////////////////////////////// - profilerTick(statePresent); + profilerTick(StatePresent); if (copy) { glDrawBuffer(GL_FRONT); glCopyPixels(0, 0, getWidth(), getHeight(), GL_COLOR); @@ -160,11 +184,11 @@ protected: getBackend()->swapBuffers(); } ////////////////////////////////////////////// - profilerTick(statePostRender); + profilerTick(StatePostRender); glFlush(); ++framect; ////////////////////////////////////////////// - profilerTick(stateOutsideRender); + profilerTick(StateOutsideRender); } virtual void handleKeyPress(KeySym key) @@ -178,12 +202,15 @@ protected: private: bool overdraw, copy; + int sleep_time; + // animation control double lastFrame; GLfloat boxPos, boxDirection; - // FPS + // FPS, profiler double lastDisplay, lastProfile; - int framect, curState; - double stateTime[numProfilerStates]; + int framect; + ProfilerState curState; + double stateTime[NumProfilerStates]; }; int main(int argc, char ** argv) @@ -195,6 +222,7 @@ int main(int argc, char ** argv) ("swap-interval,i", po::value(), "set swap interval") ("copy,c", "copy to front buffer (instead of performing a buffer swap)") ("overdraw,o", "overdraw previous image (instead of calling glClear)") + ("sleep,s", po::value()->default_value(0), "Number of milliseconds to sleap in each frame (in the drawing phase)") ; po::variables_map vm; po::store(po::parse_command_line(argc, argv, desc), vm); @@ -206,7 +234,7 @@ int main(int argc, char ** argv) } // actual program - TearTestWindow w(vm.count("overdraw"), vm.count("copy")); + TearTestWindow w(vm.count("overdraw"), vm.count("copy"), vm["sleep"].as()); w.open(800, 600); if (vm.count("swap-interval")) w.setSwapInterval(vm["swap-interval"].as());