X-Git-Url: https://git.ralfj.de/gltest.git/blobdiff_plain/8cefc2759cf91f98987e2e2b74fe913a9de88853..8dd990b1ed5cb3a4b78dfdf48b1f39d3f8bb0f0f:/gltest.cpp

diff --git a/gltest.cpp b/gltest.cpp
index d8768a7..440e8f5 100644
--- a/gltest.cpp
+++ b/gltest.cpp
@@ -24,13 +24,14 @@
 #include <limits.h>
 #include <unistd.h>
 #include <assert.h>
-#include <GL/gl.h>
 #include <boost/program_options.hpp>
 
 namespace po = boost::program_options;
 
-// include proper GL connector
+// my GL utility functions and the GL window class
+#include "glutil.h"
 #include "glwindow.h"
+// include proper GL backend
 #if defined(USE_GLX)
 #include "glxbackend.h"
 static GLBackend *createGLBackend()
@@ -63,24 +64,29 @@ static double getTime()
 	return tp.tv_sec + 1e-9 * tp.tv_nsec;
 }
 
-static void rectQuad(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, int sleep_time) : GLWindow(XOpenDisplay(0), createGLBackend()),
-		overdraw(overdraw), copy(copy), sleep_time(sleep_time), 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()
@@ -99,17 +105,9 @@ protected:
 	
 	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);
+		initialise2dProjection();
 		glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
-		glClear(GL_COLOR_BUFFER_BIT);
-		glFlush();
 	}
 	
 	void profilerTick(ProfilerState nextState)
@@ -158,31 +156,18 @@ protected:
 		profilerTick(StateClear);
 		if (overdraw) {
 			// clear manually
-			glBegin(GL_QUADS);
-			glColor3f(0.0f, 0.0f, 0.0f);
-			rectQuad(0, 0, 1, 1);
-			glEnd();
+			drawQuad(/*color*/0.0f, 0.0f, 0.0f, /*coordinates*/0, 0, 1, 1);
 		}
 		else {
 			glClear(GL_COLOR_BUFFER_BIT);
 		}
 		//////////////////////////////////////////////
 		profilerTick(StateDraw);
-		glBegin(GL_QUADS);
-		glColor3f(0.8f, 1.0f, 0.75f);
-		rectQuad(boxPos, 0, boxPos+boxWidth, 1);
-		glEnd();
+		drawQuad(/*color*/0.8f, 1.0f, 0.75f, /*coordinates*/boxPos, 0, boxPos+boxWidth, 1);
 		usleep(sleep_time*1000);
 		//////////////////////////////////////////////
 		profilerTick(StatePresent);
-		if (copy) {
-			glDrawBuffer(GL_FRONT);
-			glCopyPixels(0, 0, getWidth(), getHeight(), GL_COLOR);
-			glDrawBuffer(GL_BACK);
-		}
-		else {
-			getBackend()->swapBuffers();
-		}
+		getBackend()->swapBuffers();
 		//////////////////////////////////////////////
 		profilerTick(StatePostRender);
 		glFinish();
@@ -199,18 +184,6 @@ protected:
 			default: break;
 		}
 	}
-
-private:
-	bool overdraw, copy;
-	int sleep_time;
-	// animation control
-	double lastFrame;
-	GLfloat boxPos, boxDirection;
-	// FPS, profiler
-	double lastDisplay, lastProfile;                 
-	int framect;
-	ProfilerState curState;
-	double stateTime[NumProfilerStates];
 };
 
 int main(int argc, char ** argv)
@@ -220,7 +193,6 @@ int main(int argc, char ** argv)
 	desc.add_options()
 		("help,h", "produce help message")
 		("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)")
 	;
@@ -234,7 +206,9 @@ int main(int argc, char ** argv)
 	}
 
 	// actual program
-	TearTestWindow w(vm.count("overdraw"), vm.count("copy"), vm["sleep"].as<int>());
+	TearTestWindow w;
+	w.setOverdraw(vm.count("overdraw"));
+	w.setSleepTime(vm["sleep"].as<int>());
 	w.open(800, 600);
 	if (vm.count("swap-interval"))
 		w.setSwapInterval(vm["swap-interval"].as<int>());