X-Git-Url: https://git.ralfj.de/gltest.git/blobdiff_plain/21689b45f8d7e28bd6be565758bec0205abb8416..3e648337c136c8a8715d642857faa9e00a6db180:/gltest.cpp diff --git a/gltest.cpp b/gltest.cpp index 0cae932..edc17f8 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 @@ -6,20 +24,21 @@ #include #include #include -#include #include namespace po = boost::program_options; -// include proper GL connector +// my GL utility functions and the GL window class +#include "glutil.h" #include "glwindow.h" -#if defined(USE_GLX) +// include proper GL backend (windowing system) +#if defined(WIN_GLX) #include "glxbackend.h" static GLBackend *createGLBackend() { return new GLXBackend(); } -#elif defined(USE_EGL) +#elif defined(WIN_EGL) #include "eglbackend.h" static GLBackend *createGLBackend() { @@ -34,8 +53,8 @@ static const GLfloat boxWidth = 0.045f; static const GLfloat boxSpeed = 1.25f; // per second // profiler -enum ProfilerState { statePreRender, stateDraw, statePresent, statePostRender, stateOutsideRender, numProfilerStates }; -static const char *profilerStateNames[numProfilerStates] = { "Pre-Render", "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() @@ -45,20 +64,29 @@ static double getTime() return tp.tv_sec + 1e-9 * tp.tv_nsec; } -static void drawRect(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat 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() : GLWindow(XOpenDisplay(0), createGLBackend()), + overdraw(false), sleep_time(0), boxPos(0), boxDirection(1) {} - void setSwapInterval(int i) { - getBackend()->setSwapInterval(i); - } + void setOverdraw(bool overdraw) { this->overdraw = overdraw; } + void setSleepTime(int sleep_time) { this->sleep_time = sleep_time; } + + void setSwapInterval(int i) { getBackend()->setSwapInterval(i); } + +private: + bool overdraw; + int sleep_time; + // animation control + double lastFrame; + GLfloat boxPos, boxDirection; + // FPS, profiler + double lastDisplay, lastProfile; + int framect; + ProfilerState curState; + double stateTime[NumProfilerStates]; protected: virtual void initGL() @@ -71,29 +99,22 @@ 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; glViewport(0, 0, width, height); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glOrtho (0, 1, 1, 0, 0, 1); - glMatrixMode(GL_MODELVIEW); - glClear(GL_COLOR_BUFFER_BIT); - glFlush(); + initialise2dProjection(); + glClearColor(0.0f, 0.0f, 0.0f, 0.0f); } 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 +122,7 @@ 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 +136,7 @@ protected: void renderGL() { ////////////////////////////////////////////// - profilerTick(statePreRender); + profilerTick(StatePreRender); double time = getTime(); // anim double passedTime = time-lastFrame; @@ -132,36 +153,27 @@ protected: } lastFrame = time; ////////////////////////////////////////////// - profilerTick(stateDraw); + profilerTick(StateClear); if (overdraw) { - glBegin(GL_QUADS); // clear manually - glColor3f(0.0f, 0.0f, 0.0f); - drawRect(0, 0, 1, 1); + drawQuad(/*color*/0.0f, 0.0f, 0.0f, /*coordinates*/0, 0, 1, 1); } else { glClear(GL_COLOR_BUFFER_BIT); - glBegin(GL_QUADS); } - glColor3f(0.8f, 1.0f, 0.75f); - drawRect(boxPos, 0, boxPos+boxWidth, 1); - glEnd(); ////////////////////////////////////////////// - profilerTick(statePresent); - if (copy) { - glDrawBuffer(GL_FRONT); - glCopyPixels(0, 0, getWidth(), getHeight(), GL_COLOR); - glDrawBuffer(GL_BACK); - } - else { - getBackend()->swapBuffers(); - } + profilerTick(StateDraw); + drawQuad(/*color*/0.8f, 1.0f, 0.75f, /*coordinates*/boxPos, 0, boxPos+boxWidth, 1); + usleep(sleep_time*1000); ////////////////////////////////////////////// - profilerTick(statePostRender); - glFlush(); + profilerTick(StatePresent); + getBackend()->swapBuffers(); + ////////////////////////////////////////////// + profilerTick(StatePostRender); + glFinish(); ++framect; ////////////////////////////////////////////// - profilerTick(stateOutsideRender); + profilerTick(StateOutsideRender); } virtual void handleKeyPress(KeySym key) @@ -172,19 +184,8 @@ protected: default: break; } } - -private: - bool overdraw, copy; - double lastFrame; - GLfloat boxPos, boxDirection; - // FPS - double lastDisplay, lastProfile; - int framect, curState; - double stateTime[numProfilerStates]; }; - - int main(int argc, char ** argv) { // program options handling @@ -192,8 +193,8 @@ int main(int argc, char ** argv) desc.add_options() ("help,h", "produce help message") ("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); @@ -205,7 +206,9 @@ int main(int argc, char ** argv) } // actual program - TearTestWindow w(vm.count("overdraw"), vm.count("copy")); + TearTestWindow w; + w.setOverdraw(vm.count("overdraw")); + w.setSleepTime(vm["sleep"].as()); w.open(800, 600); if (vm.count("swap-interval")) w.setSwapInterval(vm["swap-interval"].as());