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()
return tp.tv_sec + 1e-9 * tp.tv_nsec;
}
-static void drawRect(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2)
+static void rectVertices(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) {
}
lastFrame = time;
//////////////////////////////////////////////
- profilerTick(stateDraw);
+ profilerTick(stateClear);
if (overdraw) {
- glBegin(GL_QUADS);
// clear manually
+ glBegin(GL_QUADS);
glColor3f(0.0f, 0.0f, 0.0f);
- drawRect(0, 0, 1, 1);
+ rectVertices(0, 0, 1, 1);
+ glEnd();
}
else {
glClear(GL_COLOR_BUFFER_BIT);
- glBegin(GL_QUADS);
}
+ //////////////////////////////////////////////
+ profilerTick(stateDraw);
+ glBegin(GL_QUADS);
glColor3f(0.8f, 1.0f, 0.75f);
- drawRect(boxPos, 0, boxPos+boxWidth, 1);
+ rectVertices(boxPos, 0, boxPos+boxWidth, 1);
glEnd();
+ usleep(sleep_time*1000);
//////////////////////////////////////////////
profilerTick(statePresent);
if (copy) {
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 main(int argc, char ** argv)
{
// program options handling
("swap-interval,i", po::value<int>(), "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<int>()->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);
}
// actual program
- TearTestWindow w(vm.count("overdraw"), vm.count("copy"));
+ TearTestWindow w(vm.count("overdraw"), vm.count("copy"), vm["sleep"].as<int>());
w.open(800, 600);
if (vm.count("swap-interval"))
w.setSwapInterval(vm["swap-interval"].as<int>());