progs/perf/genmipmap.c

   1 /*
   2  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * VMWARE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  */
  21
  22 /**
  23  * Measure glGenerateMipmap() speed.
  24  *
  25  * Brian Paul
  26  * 24 Sep 2009
  27  */
  28
  29 #include <string.h>
  30 #include <stdio.h>
  31 #include "glmain.h"
  32 #include "common.h"
  33
  34
  35 int WinWidth = 100, WinHeight = 100;
  36
  37 static GLboolean DrawPoint = GL_TRUE;
  38 static GLuint VBO;
  39 static GLuint TexObj = 0;
  40 static GLint BaseLevel, MaxLevel;
  41
  42 struct vertex
  43 {
  44    GLfloat x, y, s, t;
  45 };
  46
  47 static const struct vertex vertices[1] = {
  48    { 0.0, 0.0, 0.5, 0.5 },
  49 };
  50
  51 #define VOFFSET(F) ((void *) offsetof(struct vertex, F))
  52
  53 /** Called from test harness/main */
  54 void
  55 PerfInit(void)
  56 {
  57    if (!PerfExtensionSupported("GL_ARB_framebuffer_object")) {
  58       printf("Sorry, this test requires GL_ARB_framebuffer_object\n");
  59       exit(1);
  60    }
  61
  62    /* setup VBO w/ vertex data */
  63    glGenBuffersARB(1, &VBO);
  64    glBindBufferARB(GL_ARRAY_BUFFER_ARB, VBO);
  65    glBufferDataARB(GL_ARRAY_BUFFER_ARB,
  66                    sizeof(vertices), vertices, GL_STATIC_DRAW_ARB);
  67    glVertexPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(x));
  68    glTexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(s));
  69    glEnableClientState(GL_VERTEX_ARRAY);
  70    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
  71
  72    glGenTextures(1, &TexObj);
  73    glBindTexture(GL_TEXTURE_2D, TexObj);
  74    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  75    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  76    glEnable(GL_TEXTURE_2D);
  77 }
  78
  79
  80 static void
  81 GenMipmap(unsigned count)
  82 {
  83    unsigned i;
  84    for (i = 0; i < count; i++) {
  85       GLubyte texel[4];
  86       texel[0] = texel[1] = texel[2] = texel[3] = i & 0xff;
  87       /* dirty the base image */
  88       glTexSubImage2D(GL_TEXTURE_2D, BaseLevel,
  89                       0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, texel);
  90       glGenerateMipmap(GL_TEXTURE_2D);
  91       if (DrawPoint)
  92          glDrawArrays(GL_POINTS, 0, 1);
  93    }
  94    glFinish();
  95 }
  96
  97
  98 /** Called from test harness/main */
  99 void
 100 PerfNextRound(void)
 101 {
 102 }
 103
 104
 105 /** Called from test harness/main */
 106 void
 107 PerfDraw(void)
 108 {
 109    const GLint NumLevels = 12;
 110    const GLint TexWidth = 2048, TexHeight = 2048;
 111    GLubyte *img;
 112    double rate;
 113
 114    /* Make 2K x 2K texture */
 115    img = (GLubyte *) malloc(TexWidth * TexHeight * 4);
 116    memset(img, 128, TexWidth * TexHeight * 4);
 117    glTexImage2D(GL_TEXTURE_2D, 0,
 118                 GL_RGBA, TexWidth, TexHeight, 0,
 119                 GL_RGBA, GL_UNSIGNED_BYTE, img);
 120    free(img);
 121
 122    perf_printf("Texture level[0] size: %d x %d, %d levels\n",
 123                TexWidth, TexHeight, NumLevels);
 124
 125    /* loop over base levels 0, 2, 4 */
 126    for (BaseLevel = 0; BaseLevel <= 4; BaseLevel += 2) {
 127
 128       /* loop over max level */
 129       for (MaxLevel = NumLevels; MaxLevel > BaseLevel; MaxLevel--) {
 130
 131          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel);
 132          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel);
 133
 134          rate = PerfMeasureRate(GenMipmap);
 135
 136          perf_printf("   glGenerateMipmap(levels %d..%d): %.2f gens/sec\n",
 137                      BaseLevel + 1, MaxLevel, rate);
 138       }
 139    }
 140
 141    exit(0);
 142 }