+++ /dev/null
-/*
- * Test glReadPixels speed
- * Brian Paul
- * 9 April 2004
- *
- * Compile:
- * gcc readrate.c -L/usr/X11R6/lib -lglut -lGLU -lGL -lX11 -o readrate
- */
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <GL/glew.h>
-#include <GL/glut.h>
-
-/* Hack, to test drawing instead of reading */
-#define DRAW 0
-
-#define MAX_WIDTH 1280
-#define MAX_HEIGHT 1024
-
-#define NUM_WIDTHS 4
-#define NUM_HEIGHTS 4
-static const GLint Widths[] = {256, 512, 1024, 1280};
-static const GLint Heights[] = {4, 32, 256, 512, 768, 1024};
-static int WidthIndex = 1, HeightIndex = 3;
-static GLubyte *Buffer = NULL;
-static GLboolean Benchmark = GL_TRUE;
-
-#define NUM_PBO 2
-
-static GLuint PBObjects[4];
-
-static GLboolean HavePBO = GL_FALSE;
-
-
-struct format_type {
- const char *Name;
- GLuint Bytes;
- GLenum Format;
- GLenum Type;
-};
-
-static struct format_type Formats[] = {
- { "GL_RGB, GLubyte", 3, GL_RGB, GL_UNSIGNED_BYTE },
- { "GL_BGR, GLubyte", 3, GL_BGR, GL_UNSIGNED_BYTE },
- { "GL_RGBA, GLubyte", 4, GL_RGBA, GL_UNSIGNED_BYTE },
- { "GL_BGRA, GLubyte", 4, GL_BGRA, GL_UNSIGNED_BYTE },
- { "GL_ABGR, GLubyte", 4, GL_ABGR_EXT, GL_UNSIGNED_BYTE },
- { "GL_RGBA, GLuint_8_8_8_8", 4, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8 },
- { "GL_BGRA, GLuint_8_8_8_8", 4, GL_BGRA_EXT, GL_UNSIGNED_INT_8_8_8_8 },
- { "GL_BGRA, GLuint_8_8_8_8_rev", 4, GL_BGRA_EXT, GL_UNSIGNED_INT_8_8_8_8_REV },
-#ifdef GL_EXT_packed_depth_stencil
- { "GL_DEPTH_STENCIL_EXT, GLuint24+8", 4, GL_DEPTH_STENCIL_EXT, GL_UNSIGNED_INT_24_8_EXT },
-#endif
- { "GL_DEPTH_COMPONENT, GLfloat", 4, GL_DEPTH_COMPONENT, GL_FLOAT },
- { "GL_DEPTH_COMPONENT, GLuint", 4, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT }
-};
-
-#define NUM_FORMATS (sizeof(Formats) / sizeof(struct format_type))
-
-
-static void
-PrintString(const char *s)
-{
- while (*s) {
- glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
- s++;
- }
-}
-
-
-static void
-MeasureFormat(struct format_type *fmt, GLint width, GLint height, GLuint pbo)
-{
- double t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
- double t1;
- int j;
-
- for (j = 0; ; j++) {
-
- glBegin(GL_POINTS);
- glVertex2f(1,1);
- glEnd();
-
-#if DRAW
- glWindowPos2iARB(0,0);
- glDrawPixels(width, height,
- fmt->Format, fmt->Type, Buffer);
- glFinish();
-#else
- if (pbo) {
- glBindBufferARB(GL_PIXEL_PACK_BUFFER_EXT, PBObjects[j % NUM_PBO]);
- glReadPixels(0, 0, width, height,
- fmt->Format, fmt->Type, 0);
- }
- else {
- glReadPixels(0, 0, width, height,
- fmt->Format, fmt->Type, Buffer);
- }
-#endif
-
- t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
- if (t1 - t0 > 2.0) {
- GLdouble rate = width * height / (1024.0 * 1024.0) * j / (t1 - t0);
-#if DRAW
- printf("%-32s %.2f draws/sec %.2f MPixels/sec %.2f MBytes/sec\n",
- fmt->Name, j / (t1-t0), rate, rate * fmt->Bytes);
-#else
- printf("%-32s %.2f reads/sec %.2f MPixels/sec %.2f MBytes/sec\n",
- fmt->Name, j / (t1-t0), rate, rate * fmt->Bytes);
-#endif
- break;
- }
-
- if (j == 0) {
- /* check for error */
- GLenum err = glGetError();
- if (err) {
- printf("GL Error 0x%x for %s\n", err, fmt->Name);
- return;
- }
- }
- }
-}
-
-
-
-static void
-Draw(void)
-{
- char str[1000];
- int width = Widths[WidthIndex];
- int height = Heights[HeightIndex];
- int y = MAX_HEIGHT - 50;
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glWindowPos2iARB(10, y);
- sprintf(str, "ReadPixels size: %d x %d", width, height);
- PrintString(str);
- y -= 14;
-
- glWindowPos2iARB(10, y);
- PrintString("Press up/down/left/right to change image size.");
- y -= 14;
-
- glWindowPos2iARB(10, y);
- PrintString("Press 'b' to run benchmark test.");
- y -= 14;
-
- if (Benchmark) {
- glWindowPos2iARB(10, y);
- PrintString("Testing...");
- }
-
- glutSwapBuffers();
-
- if (Benchmark) {
- GLuint i, pbo;
-#if DRAW
- printf("Draw size: Width=%d Height=%d\n", width, height);
-#else
- printf("Read size: Width=%d Height=%d\n", width, height);
-#endif
- for (pbo = 0; pbo <= HavePBO; pbo++) {
- printf("Pixel Buffer Object: %d\n", pbo);
-
- if (pbo == 0) {
- glBindBufferARB(GL_PIXEL_PACK_BUFFER_EXT, 0);
- }
-
- for (i = 0; i < NUM_FORMATS; i++) {
- MeasureFormat(Formats + i, width, height, pbo);
- }
- }
-
- Benchmark = GL_FALSE;
-
- /* redraw window text */
- glutPostRedisplay();
- }
-
-}
-
-
-static void
-Reshape(int width, int height)
-{
- glViewport(0, 0, width, height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(-1, 1, -1, 1, -1, 1);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-}
-
-
-static void
-Key(unsigned char key, int x, int y)
-{
- (void) x;
- (void) y;
- switch (key) {
- case 'b':
- Benchmark = 1;
- break;
- case 27:
- exit(0);
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void
-SpecialKey(int key, int x, int y)
-{
- (void) x;
- (void) y;
- switch (key) {
- case GLUT_KEY_UP:
- if (HeightIndex + 1 < NUM_WIDTHS)
- HeightIndex++;
- break;
- case GLUT_KEY_DOWN:
- if (HeightIndex > 0)
- HeightIndex--;
- break;
- case GLUT_KEY_LEFT:
- if (WidthIndex > 0)
- WidthIndex--;
- break;
- case GLUT_KEY_RIGHT:
- if (WidthIndex + 1 < NUM_HEIGHTS)
- WidthIndex++;
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void
-Init(void)
-{
- Buffer = malloc(MAX_WIDTH * MAX_HEIGHT * 4);
- assert(Buffer);
-#if DRAW
- printf("glDrawPixels test report:\n");
-#else
- printf("glReadPixels test report:\n");
-#endif
- printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER));
- printf("GL_VERSION: %s\n", (char *) glGetString(GL_VERSION));
-
- if (glutExtensionSupported("GL_ARB_pixel_buffer_object")) {
- int i;
- HavePBO = 1;
- glGenBuffersARB(NUM_PBO, PBObjects);
- for (i = 0; i < NUM_PBO; i++) {
- glBindBufferARB(GL_PIXEL_PACK_BUFFER_EXT, PBObjects[i]);
- glBufferDataARB(GL_PIXEL_PACK_BUFFER_EXT,
- MAX_WIDTH * MAX_HEIGHT * 4, NULL, GL_STREAM_READ);
- }
- }
-}
-
-
-int
-main(int argc, char *argv[])
-{
- glutInit(&argc, argv);
- glutInitWindowPosition(0, 0);
- glutInitWindowSize(MAX_WIDTH, MAX_HEIGHT);
- glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_STENCIL);
- glutCreateWindow(argv[0]);
- glewInit();
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutSpecialFunc(SpecialKey);
- glutDisplayFunc(Draw);
- Init();
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff