143 lines
4.0 KiB
C
143 lines
4.0 KiB
C
/*
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* Copyright (C) 2009 VMware, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VMWARE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* Measure glGenerateMipmap() speed.
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*
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* Brian Paul
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* 24 Sep 2009
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*/
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#include <string.h>
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#include <stdio.h>
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#include "glmain.h"
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#include "common.h"
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int WinWidth = 100, WinHeight = 100;
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static GLboolean DrawPoint = GL_TRUE;
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static GLuint VBO;
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static GLuint TexObj = 0;
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static GLint BaseLevel, MaxLevel;
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struct vertex
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{
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GLfloat x, y, s, t;
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};
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static const struct vertex vertices[1] = {
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{ 0.0, 0.0, 0.5, 0.5 },
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};
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#define VOFFSET(F) ((void *) offsetof(struct vertex, F))
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/** Called from test harness/main */
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void
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PerfInit(void)
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{
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if (!PerfExtensionSupported("GL_ARB_framebuffer_object")) {
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printf("Sorry, this test requires GL_ARB_framebuffer_object\n");
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exit(1);
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}
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/* setup VBO w/ vertex data */
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glGenBuffersARB(1, &VBO);
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glBindBufferARB(GL_ARRAY_BUFFER_ARB, VBO);
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glBufferDataARB(GL_ARRAY_BUFFER_ARB,
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sizeof(vertices), vertices, GL_STATIC_DRAW_ARB);
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glVertexPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(x));
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glTexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(s));
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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glGenTextures(1, &TexObj);
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glBindTexture(GL_TEXTURE_2D, TexObj);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glEnable(GL_TEXTURE_2D);
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}
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static void
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GenMipmap(unsigned count)
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{
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unsigned i;
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for (i = 0; i < count; i++) {
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GLubyte texel[4];
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texel[0] = texel[1] = texel[2] = texel[3] = i & 0xff;
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/* dirty the base image */
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glTexSubImage2D(GL_TEXTURE_2D, BaseLevel,
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0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, texel);
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glGenerateMipmap(GL_TEXTURE_2D);
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if (DrawPoint)
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glDrawArrays(GL_POINTS, 0, 1);
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}
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glFinish();
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}
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/** Called from test harness/main */
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void
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PerfNextRound(void)
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{
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}
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/** Called from test harness/main */
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void
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PerfDraw(void)
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{
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const GLint NumLevels = 12;
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const GLint TexWidth = 2048, TexHeight = 2048;
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GLubyte *img;
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double rate;
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/* Make 2K x 2K texture */
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img = (GLubyte *) malloc(TexWidth * TexHeight * 4);
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memset(img, 128, TexWidth * TexHeight * 4);
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glTexImage2D(GL_TEXTURE_2D, 0,
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GL_RGBA, TexWidth, TexHeight, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, img);
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free(img);
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perf_printf("Texture level[0] size: %d x %d, %d levels\n",
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TexWidth, TexHeight, NumLevels);
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/* loop over base levels 0, 2, 4 */
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for (BaseLevel = 0; BaseLevel <= 4; BaseLevel += 2) {
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/* loop over max level */
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for (MaxLevel = NumLevels; MaxLevel > BaseLevel; MaxLevel--) {
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel);
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rate = PerfMeasureRate(GenMipmap);
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perf_printf(" glGenerateMipmap(levels %d..%d): %.2f gens/sec\n",
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BaseLevel + 1, MaxLevel, rate);
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}
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}
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exit(0);
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}
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