+++ /dev/null
-/*
- * Measure glTexSubImage and glCopyTexSubImage speed
- *
- * Brian Paul
- * 26 Jan 2006
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <GL/glew.h>
-#include <GL/glut.h>
-
-static GLint WinWidth = 1024, WinHeight = 512;
-static GLint TexWidth = 512, TexHeight = 512;
-
-static GLuint TexObj = 1;
-
-static GLenum IntFormat = GL_RGBA8;
-static GLenum ReadFormat = GL_RGBA; /* for glReadPixels */
-
-static GLboolean DrawQuad = GL_TRUE;
-
-
-/**
- * draw teapot image, size TexWidth by TexHeight
- */
-static void
-DrawTestImage(void)
-{
- GLfloat ar;
-
- glViewport(0, 0, TexWidth, TexHeight);
- glScissor(0, 0, TexWidth, TexHeight);
- glEnable(GL_SCISSOR_TEST);
-
- glClearColor(0.5, 0.5, 0.5, 0.0);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- ar = (float) TexWidth / TexHeight;
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum(-ar, ar, -1.0, 1.0, 5.0, 25.0);
- glMatrixMode(GL_MODELVIEW);
-
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glEnable(GL_DEPTH_TEST);
- glFrontFace(GL_CW);
- glPushMatrix();
- glRotatef(45, 1, 0, 0);
- glRotatef(45, 0, 1, 0);
- glutSolidTeapot(2.3);
- glPopMatrix();
- glFrontFace(GL_CCW);
- glDisable(GL_DEPTH_TEST);
- glDisable(GL_LIGHTING);
-
- glDisable(GL_SCISSOR_TEST);
-
- glViewport(0, 0, WinWidth, WinHeight);
- glFinish();
-}
-
-
-/**
- * Do glCopyTexSubImage2D call (update texture with framebuffer data)
- * If doSubRect is true, do the copy in four pieces instead of all at once.
- */
-static void
-DoCopyTex(GLboolean doSubRect)
-{
- if (doSubRect) {
- /* copy in four parts */
- int w = TexWidth / 2, h = TexHeight / 2;
- int x0 = 0, y0 = 0;
- int x1 = w, y1 = h;
-#if 1
- glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y0, x0, y0, w, h);
- glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y0, x1, y0, w, h);
- glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y1, x0, y1, w, h);
- glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y1, x1, y1, w, h);
-#else
- /* scramble */
- glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y0, x1, y1, w, h);
- glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y0, x0, y1, w, h);
- glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y1, x1, y0, w, h);
- glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y1, x0, y0, w, h);
-#endif
- }
- else {
- glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, TexWidth, TexHeight);
- }
-}
-
-
-/**
- * Do glTexSubImage2D (update texture w/ user data)
- * If doSubRect, do update in four pieces, else all at once.
- */
-static void
-SubTex(GLboolean doSubRect, const GLubyte *image)
-{
- if (doSubRect) {
- /* four pieces */
- int w = TexWidth / 2, h = TexHeight / 2;
- int x0 = 0, y0 = 0;
- int x1 = w, y1 = h;
- glPixelStorei(GL_UNPACK_ROW_LENGTH, TexWidth);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-
- glPixelStorei(GL_UNPACK_SKIP_ROWS, y0);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, x0);
- glTexSubImage2D(GL_TEXTURE_2D, 0, x0, y0, w, h,
- ReadFormat, GL_UNSIGNED_BYTE, image);
-
- glPixelStorei(GL_UNPACK_SKIP_ROWS, y0);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, x1);
- glTexSubImage2D(GL_TEXTURE_2D, 0, x1, y0, w, h,
- ReadFormat, GL_UNSIGNED_BYTE, image);
-
- glPixelStorei(GL_UNPACK_SKIP_ROWS, y1);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, x0);
- glTexSubImage2D(GL_TEXTURE_2D, 0, x0, y1, w, h,
- ReadFormat, GL_UNSIGNED_BYTE, image);
-
- glPixelStorei(GL_UNPACK_SKIP_ROWS, y1);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, x1);
- glTexSubImage2D(GL_TEXTURE_2D, 0, x1, y1, w, h,
- ReadFormat, GL_UNSIGNED_BYTE, image);
- }
- else {
- /* all at once */
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, TexWidth, TexHeight,
- ReadFormat, GL_UNSIGNED_BYTE, image);
- }
-}
-
-
-/**
- * Measure gl[Copy]TexSubImage rate.
- * This actually also includes time to render a quad and SwapBuffers.
- */
-static void
-RunTest(GLboolean copyTex, GLboolean doSubRect)
-{
- double t0, t1;
- int iters = 0;
- float copyRate, mbRate;
- float rot = 0.0;
- int bpp, r, g, b, a;
- int w, h;
- GLubyte *image = NULL;
-
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_RED_SIZE, &r);
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_GREEN_SIZE, &g);
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BLUE_SIZE, &b);
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &a);
- bpp = (r + g + b + a) / 8;
-
- if (!copyTex) {
- /* read image from frame buffer */
- image = (GLubyte *) malloc(TexWidth * TexHeight * bpp);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
- glReadPixels(0, 0, TexWidth, TexHeight,
- ReadFormat, GL_UNSIGNED_BYTE, image);
- }
-
- glEnable(GL_TEXTURE_2D);
- glViewport(WinWidth / 2, 0, WinWidth / 2, WinHeight);
-
- t0 = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
-
- do {
- if (copyTex)
- /* Framebuffer -> Texture */
- DoCopyTex(doSubRect);
- else {
- /* Main Mem -> Texture */
- SubTex(doSubRect, image);
- }
-
- /* draw textured quad */
- if (DrawQuad) {
- glPushMatrix();
- glRotatef(rot, 0, 0, 1);
- glTranslatef(1, 0, 0);
- glBegin(GL_POLYGON);
- glTexCoord2f(0, 0); glVertex2f(-1, -1);
- glTexCoord2f(1, 0); glVertex2f( 1, -1);
- glTexCoord2f(1, 1); glVertex2f( 1, 1);
- glTexCoord2f(0, 1); glVertex2f(-1, 1);
- glEnd();
- glPopMatrix();
- }
-
- iters++;
- rot += 2.0;
-
- t1 = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
- if (DrawQuad) {
- glutSwapBuffers();
- }
- } while (t1 - t0 < 5.0);
-
- glDisable(GL_TEXTURE_2D);
- if (image)
- free(image);
-
- if (doSubRect) {
- w = TexWidth / 2;
- h = TexHeight / 2;
- iters *= 4;
- }
- else {
- w = TexWidth;
- h = TexHeight;
- }
-
- copyRate = iters / (t1 - t0);
- mbRate = w * h * bpp * copyRate / (1024 * 1024);
-
- if (copyTex)
- printf("glCopyTexSubImage: %d x %d, %d Bpp:\n", w, h, bpp);
- else
- printf("glTexSubImage: %d x %d, %d Bpp:\n", w, h, bpp);
- printf(" %d calls in %.2f = %.2f calls/sec, %.2f MB/s\n",
- iters, t1-t0, copyRate, mbRate);
-}
-
-
-static void
-Draw(void)
-{
- glClearColor(0.2, 0.2, 0.8, 0);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- DrawTestImage();
- if (!DrawQuad) {
- glutSwapBuffers();
- }
-
- RunTest(GL_FALSE, GL_FALSE);
- RunTest(GL_FALSE, GL_TRUE);
- RunTest(GL_TRUE, GL_FALSE);
- RunTest(GL_TRUE, GL_TRUE);
-
- glutSwapBuffers();
-
- printf("exiting\n");
- exit(0);
-}
-
-
-static void
-Reshape(int width, int height)
-{
- glViewport(0, 0, width, height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(0.0, 0.0, -15.0);
-}
-
-
-static void
-Key(unsigned char key, int x, int y)
-{
- (void) x;
- (void) y;
- switch (key) {
- 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:
- break;
- case GLUT_KEY_DOWN:
- break;
- case GLUT_KEY_LEFT:
- break;
- case GLUT_KEY_RIGHT:
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void
-Init(void)
-{
- /* create initial, empty teximage */
- glBindTexture(GL_TEXTURE_2D, TexObj);
- glTexImage2D(GL_TEXTURE_2D, 0, IntFormat, TexWidth, TexHeight, 0,
- GL_RGBA, GL_UNSIGNED_BYTE, NULL);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-}
-
-
-
-static void
-ParseArgs(int argc, char *argv[])
-{
- int i;
- for (i = 1; i < argc; i++) {
- if (strcmp(argv[i], "-nodraw") == 0)
- DrawQuad = GL_FALSE;
- }
-}
-
-
-int
-main(int argc, char *argv[])
-{
- GLint mode = GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE | GLUT_DEPTH;
- glutInit(&argc, argv);
-
- ParseArgs(argc, argv);
-
- glutInitWindowPosition(0, 0);
- glutInitWindowSize(WinWidth, WinHeight);
- glutInitDisplayMode(mode);
- glutCreateWindow(argv[0]);
- glewInit();
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutSpecialFunc(SpecialKey);
- glutDisplayFunc(Draw);
-
- printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER));
- Init();
-
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff