From f47495ec42491f1c32391f29e5ed8819eaef6ee2 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Sat, 18 Apr 2009 12:58:00 -0600 Subject: demos: move texdown.c to tests/ --- progs/demos/texdown.c | 477 -------------------------------------------------- 1 file changed, 477 deletions(-) delete mode 100644 progs/demos/texdown.c (limited to 'progs/demos/texdown.c') diff --git a/progs/demos/texdown.c b/progs/demos/texdown.c deleted file mode 100644 index 7e46045832..0000000000 --- a/progs/demos/texdown.c +++ /dev/null @@ -1,477 +0,0 @@ - -/* - * Copyright (C) 1999 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/* - * texdown - * - * Measure texture download speed. - * Use keyboard to change texture size, format, datatype, scale/bias, - * subimageload, etc. - * - * Brian Paul 28 January 2000 - */ - - -#include -#include -#include -#include - - -static GLsizei MaxSize = 2048; -static GLsizei TexWidth = 1024, TexHeight = 1024, TexBorder = 0; -static GLboolean ScaleAndBias = GL_FALSE; -static GLboolean SubImage = GL_FALSE; -static GLdouble DownloadRate = 0.0; /* texels/sec */ - -static GLuint Mode = 0; - - -/* Try and avoid L2 cache effects by cycling through a small number of - * textures. - * - * At the initial size of 1024x1024x4 == 4mbyte, say 8 textures will - * keep us out of most caches at 32mb total. - * - * This turns into a fairly interesting question of what exactly you - * expect to be in cache in normal usage, and what you think should be - * outside. There's no rules for this, no reason to favour one usage - * over another except what the application you care about happens to - * resemble most closely. - * - * - Should the client texture image be in L2 cache? Has it just been - * generated or read from disk? - * - Does the application really use >1 texture, or is it constantly - * updating one image in-place? - * - * Different answers will favour different texture upload mechanisms. - * To upload an image that is purely outside of cache, a DMA-based - * upload will probably win, whereas for small, in-cache textures, - * copying looks good. - */ -#define NR_TEXOBJ 4 -static GLuint TexObj[NR_TEXOBJ]; - - -struct FormatRec { - GLenum Format; - GLenum Type; - GLenum IntFormat; - GLint TexelSize; -}; - - -static const struct FormatRec FormatTable[] = { - /* Format Type IntFormat TexelSize */ - { GL_BGRA, GL_UNSIGNED_BYTE, GL_RGBA, 4 }, - { GL_RGB, GL_UNSIGNED_BYTE, GL_RGB, 3 }, - { GL_RGBA, GL_UNSIGNED_BYTE, GL_RGBA, 4 }, - { GL_RGBA, GL_UNSIGNED_BYTE, GL_RGB, 4 }, - { GL_RGB, GL_UNSIGNED_SHORT_5_6_5, GL_RGB, 2 }, - { GL_LUMINANCE, GL_UNSIGNED_BYTE, GL_LUMINANCE, 1 }, - { GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, GL_LUMINANCE_ALPHA, 2 }, - { GL_ALPHA, GL_UNSIGNED_BYTE, GL_ALPHA, 1 }, -}; -static GLint Format; - -#define NUM_FORMATS (sizeof(FormatTable)/sizeof(FormatTable[0])) - -static int -BytesPerTexel(GLint format) -{ - return FormatTable[format].TexelSize; -} - - -static const char * -FormatStr(GLenum format) -{ - switch (format) { - case GL_RGB: - return "GL_RGB"; - case GL_RGBA: - return "GL_RGBA"; - case GL_BGRA: - return "GL_BGRA"; - case GL_LUMINANCE: - return "GL_LUMINANCE"; - case GL_LUMINANCE_ALPHA: - return "GL_LUMINANCE_ALPHA"; - case GL_ALPHA: - return "GL_ALPHA"; - default: - return ""; - } -} - - -static const char * -TypeStr(GLenum type) -{ - switch (type) { - case GL_UNSIGNED_BYTE: - return "GL_UNSIGNED_BYTE"; - case GL_UNSIGNED_SHORT: - return "GL_UNSIGNED_SHORT"; - case GL_UNSIGNED_SHORT_5_6_5: - return "GL_UNSIGNED_SHORT_5_6_5"; - case GL_UNSIGNED_SHORT_5_6_5_REV: - return "GL_UNSIGNED_SHORT_5_6_5_REV"; - default: - return ""; - } -} - -/* On x86, there is a performance cliff for memcpy to texture memory - * for sources below 64 byte alignment. We do our best with this in - * the driver, but it is better if the images are correctly aligned to - * start with: - */ -#define ALIGN (1<<12) - -static unsigned long align(unsigned long value, unsigned long a) -{ - return (value + a - 1) & ~(a-1); -} - -static void -MeasureDownloadRate(void) -{ - const int w = TexWidth + 2 * TexBorder; - const int h = TexHeight + 2 * TexBorder; - const int image_bytes = align(w * h * BytesPerTexel(Format), ALIGN); - const int bytes = image_bytes * NR_TEXOBJ; - GLubyte *orig_texImage, *orig_getImage; - GLubyte *texImage, *getImage; - GLdouble t0, t1, time; - int count; - int i; - int offset = 0; - GLdouble total = 0; /* ints will tend to overflow */ - - printf("allocating %d bytes for %d %dx%d images\n", - bytes, NR_TEXOBJ, w, h); - - orig_texImage = (GLubyte *) malloc(bytes + ALIGN); - orig_getImage = (GLubyte *) malloc(image_bytes + ALIGN); - if (!orig_texImage || !orig_getImage) { - DownloadRate = 0.0; - return; - } - - printf("alloc %p %p\n", orig_texImage, orig_getImage); - - texImage = (GLubyte *)align((unsigned long)orig_texImage, ALIGN); - getImage = (GLubyte *)align((unsigned long)orig_getImage, ALIGN); - - for (i = 1; !(((unsigned long)texImage) & i); i<<=1) - ; - printf("texture image alignment: %d bytes (%p)\n", i, texImage); - - for (i = 0; i < bytes; i++) { - texImage[i] = i & 0xff; - } - - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - glPixelStorei(GL_PACK_ALIGNMENT, 1); - - if (ScaleAndBias) { - glPixelTransferf(GL_RED_SCALE, 0.5); - glPixelTransferf(GL_GREEN_SCALE, 0.5); - glPixelTransferf(GL_BLUE_SCALE, 0.5); - glPixelTransferf(GL_RED_BIAS, 0.5); - glPixelTransferf(GL_GREEN_BIAS, 0.5); - glPixelTransferf(GL_BLUE_BIAS, 0.5); - } - else { - glPixelTransferf(GL_RED_SCALE, 1.0); - glPixelTransferf(GL_GREEN_SCALE, 1.0); - glPixelTransferf(GL_BLUE_SCALE, 1.0); - glPixelTransferf(GL_RED_BIAS, 0.0); - glPixelTransferf(GL_GREEN_BIAS, 0.0); - glPixelTransferf(GL_BLUE_BIAS, 0.0); - } - - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glEnable(GL_TEXTURE_2D); - - count = 0; - t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001; - do { - int img = count%NR_TEXOBJ; - GLubyte *img_ptr = texImage + img * image_bytes; - - glBindTexture(GL_TEXTURE_2D, TexObj[img]); - - if (SubImage && count > 0) { - /* Only update a portion of the image each iteration. This - * is presumably why you'd want to use texsubimage, otherwise - * you may as well just call teximage again. - * - * A bigger question is whether to use a pointer that moves - * with each call, ie does the incoming data come from L2 - * cache under normal circumstances, or is it pulled from - * uncached memory? - * - * There's a good argument to say L2 cache, ie you'd expect - * the data to have been recently generated. It's possible - * that it could have come from a file read, which may or may - * not have gone through the cpu. - */ - glTexSubImage2D(GL_TEXTURE_2D, 0, - -TexBorder, - -TexBorder + offset * h/8, - w, - h/8, - FormatTable[Format].Format, - FormatTable[Format].Type, -#if 1 - texImage /* likely in L2$ */ -#else - img_ptr + offset * bytes/8 /* unlikely in L2$ */ -#endif - ); - offset += 1; - offset %= 8; - total += w * h / 8; - } - else { - glTexImage2D(GL_TEXTURE_2D, 0, - FormatTable[Format].IntFormat, w, h, TexBorder, - FormatTable[Format].Format, - FormatTable[Format].Type, - img_ptr); - total += w*h; - } - - /* draw a tiny polygon to force texture into texram */ - glBegin(GL_TRIANGLES); - glTexCoord2f(0, 0); glVertex2f(1, 1); - glTexCoord2f(1, 0); glVertex2f(3, 1); - glTexCoord2f(0.5, 1); glVertex2f(2, 3); - glEnd(); - - t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001; - time = t1 - t0; - count++; - } while (time < 3.0); - - glDisable(GL_TEXTURE_2D); - - printf("total texels=%f time=%f\n", total, time); - DownloadRate = total / time; - - - free(orig_texImage); - free(orig_getImage); - - { - GLint err = glGetError(); - if (err) - printf("GL error %d\n", err); - } -} - - -static void -PrintString(const char *s) -{ - while (*s) { - glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s); - s++; - } -} - - -static void -Display(void) -{ - const int w = TexWidth + 2 * TexBorder; - const int h = TexHeight + 2 * TexBorder; - char s[1000]; - - glClear(GL_COLOR_BUFFER_BIT); - - glRasterPos2i(10, 80); - sprintf(s, "Texture size[cursor]: %d x %d Border[b]: %d", w, h, TexBorder); - PrintString(s); - - glRasterPos2i(10, 65); - sprintf(s, "Format[f]: %s Type: %s IntFormat: %s", - FormatStr(FormatTable[Format].Format), - TypeStr( FormatTable[Format].Type), - FormatStr(FormatTable[Format].IntFormat)); - PrintString(s); - - glRasterPos2i(10, 50); - sprintf(s, "Pixel Scale&Bias[p]: %s TexSubImage[s]: %s", - ScaleAndBias ? "Yes" : "No", - SubImage ? "Yes" : "No"); - PrintString(s); - - if (Mode == 0) { - glRasterPos2i(200, 10); - sprintf(s, "...Measuring..."); - PrintString(s); - glutSwapBuffers(); - glutPostRedisplay(); - Mode++; - } - else if (Mode == 1) { - MeasureDownloadRate(); - glutPostRedisplay(); - Mode++; - } - else { - /* show results */ - glRasterPos2i(10, 10); - sprintf(s, "Download rate: %g Mtexels/second %g MB/second", - DownloadRate / 1000000.0, - DownloadRate * BytesPerTexel(Format) / 1000000.0); - PrintString(s); - { - GLint r, g, b, a, l, i; - 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); - glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_LUMINANCE_SIZE, &l); - glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTENSITY_SIZE, &i); - sprintf(s, "TexelBits: R=%d G=%d B=%d A=%d L=%d I=%d", r, g, b, a, l, i); - glRasterPos2i(10, 25); - PrintString(s); - } - - glutSwapBuffers(); - } -} - - -static void -Reshape(int width, int height) -{ - glViewport( 0, 0, width, height ); - glMatrixMode( GL_PROJECTION ); - glLoadIdentity(); - glOrtho(0, width, 0, height, -1, 1); - glMatrixMode( GL_MODELVIEW ); - glLoadIdentity(); -} - - - -static void -Key(unsigned char key, int x, int y) -{ - (void) x; - (void) y; - switch (key) { - case ' ': - Mode = 0; - break; - case 'b': - /* toggle border */ - TexBorder = 1 - TexBorder; - Mode = 0; - break; - case 'f': - /* change format */ - Format = (Format + 1) % NUM_FORMATS; - Mode = 0; - break; - case 'F': - /* change format */ - Format = (Format - 1) % NUM_FORMATS; - Mode = 0; - break; - case 'p': - /* toggle border */ - ScaleAndBias = !ScaleAndBias; - Mode = 0; - break; - case 's': - SubImage = !SubImage; - Mode = 0; - 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 (TexHeight < MaxSize) - TexHeight *= 2; - break; - case GLUT_KEY_DOWN: - if (TexHeight > 1) - TexHeight /= 2; - break; - case GLUT_KEY_LEFT: - if (TexWidth > 1) - TexWidth /= 2; - break; - case GLUT_KEY_RIGHT: - if (TexWidth < MaxSize) - TexWidth *= 2; - break; - } - Mode = 0; - glutPostRedisplay(); -} - - -static void -Init(void) -{ - printf("GL_VENDOR = %s\n", (const char *) glGetString(GL_VENDOR)); - printf("GL_VERSION = %s\n", (const char *) glGetString(GL_VERSION)); - printf("GL_RENDERER = %s\n", (const char *) glGetString(GL_RENDERER)); -} - - -int -main(int argc, char *argv[]) -{ - glutInit( &argc, argv ); - glutInitWindowPosition( 0, 0 ); - glutInitWindowSize( 600, 100 ); - glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH ); - glutCreateWindow(argv[0]); - glutReshapeFunc( Reshape ); - glutKeyboardFunc( Key ); - glutSpecialFunc( SpecialKey ); - glutDisplayFunc( Display ); - Init(); - glutMainLoop(); - return 0; -} -- cgit v1.2.3