progs/perf/fill.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 fill rates.
  24  *
  25  * Brian Paul
  26  * 21 Sep 2009
  27  */
  28
  29 #include "glmain.h"
  30 #include "common.h"
  31
  32
  33 int WinWidth = 1000, WinHeight = 1000;
  34
  35 static GLuint VBO, TexObj;
  36
  37
  38 struct vertex
  39 {
  40    GLfloat x, y, s, t, r, g, b, a;
  41 };
  42
  43 #define VOFFSET(F) ((void *) offsetof(struct vertex, F))
  44
  45 static const struct vertex vertices[4] = {
  46    /*  x     y     s    t     r    g    b    a  */
  47    { -1.0, -1.0,  0.0, 0.0,  1.0, 0.0, 0.0, 0.5 },
  48    {  1.0, -1.0,  1.0, 0.0,  0.0, 1.0, 0.0, 0.5 },
  49    {  1.0,  1.0,  1.0, 1.0,  0.0, 0.0, 1.0, 0.5 },
  50    { -1.0,  1.0,  0.0, 1.0,  1.0, 1.0, 1.0, 0.5 }
  51 };
  52
  53
  54 static const char *VertexShader =
  55    "void main() \n"
  56    "{ \n"
  57    "   gl_Position = ftransform(); \n"
  58    "   gl_TexCoord[0] = gl_MultiTexCoord0; \n"
  59    "   gl_FrontColor = gl_Color; \n"
  60    "} \n";
  61
  62 /* simple fragment shader */
  63 static const char *FragmentShader1 =
  64    "uniform sampler2D Tex; \n"
  65    "void main() \n"
  66    "{ \n"
  67    "   vec4 t = texture2D(Tex, gl_TexCoord[0].xy); \n"
  68    "   gl_FragColor = vec4(1.0) - t * gl_Color; \n"
  69    "} \n";
  70
  71 /**
  72  * A more complex fragment shader (but equivalent to first shader).
  73  * A good optimizer should catch some of these no-op operations, but
  74  * probably not all of them.
  75  */
  76 static const char *FragmentShader2 =
  77    "uniform sampler2D Tex; \n"
  78    "void main() \n"
  79    "{ \n"
  80    "   // as above \n"
  81    "   vec4 t = texture2D(Tex, gl_TexCoord[0].xy); \n"
  82    "   t = vec4(1.0) - t * gl_Color; \n"
  83
  84    "   vec4 u; \n"
  85
  86    "   // no-op negate/swizzle \n"
  87    "   u = -t.wzyx; \n"
  88    "   t = -u.wzyx; \n"
  89
  90    "   // no-op inverts \n"
  91    "   t = vec4(1.0) - t; \n"
  92    "   t = vec4(1.0) - t; \n"
  93
  94    "   // no-op min/max \n"
  95    "   t = min(t, t); \n"
  96    "   t = max(t, t); \n"
  97
  98    "   // no-op moves \n"
  99    "   u = t; \n"
 100    "   t = u; \n"
 101    "   u = t; \n"
 102    "   t = u; \n"
 103
 104    "   // no-op add/mul \n"
 105    "   t = (t + t + t + t) * 0.25; \n"
 106
 107    "   // no-op mul/sub \n"
 108    "   t = 3.0 * t - 2.0 * t; \n"
 109
 110    "   // no-op negate/min/max \n"
 111    "   t = -min(-t, -t); \n"
 112    "   t = -max(-t, -t); \n"
 113
 114    "   gl_FragColor = t; \n"
 115    "} \n";
 116
 117 static GLuint ShaderProg1, ShaderProg2;
 118
 119
 120
 121 /** Called from test harness/main */
 122 void
 123 PerfInit(void)
 124 {
 125    GLint u;
 126
 127    /* setup VBO w/ vertex data */
 128    glGenBuffersARB(1, &VBO);
 129    glBindBufferARB(GL_ARRAY_BUFFER_ARB, VBO);
 130    glBufferDataARB(GL_ARRAY_BUFFER_ARB,
 131                    sizeof(vertices), vertices, GL_STATIC_DRAW_ARB);
 132    glVertexPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(x));
 133    glTexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(s));
 134    glColorPointer(4, GL_FLOAT, sizeof(struct vertex), VOFFSET(r));
 135    glEnableClientState(GL_VERTEX_ARRAY);
 136    glEnableClientState(GL_COLOR_ARRAY);
 137
 138    /* setup texture */
 139    TexObj = PerfCheckerTexture(128, 128);
 140
 141    /* setup shaders */
 142    ShaderProg1 = PerfShaderProgram(VertexShader, FragmentShader1);
 143    glUseProgram(ShaderProg1);
 144    u = glGetUniformLocation(ShaderProg1, "Tex");
 145    glUniform1i(u, 0);  /* texture unit 0 */
 146
 147    ShaderProg2 = PerfShaderProgram(VertexShader, FragmentShader2);
 148    glUseProgram(ShaderProg2);
 149    u = glGetUniformLocation(ShaderProg2, "Tex");
 150    glUniform1i(u, 0);  /* texture unit 0 */
 151
 152    glUseProgram(0);
 153 }
 154
 155
 156 static void
 157 Ortho(void)
 158 {
 159    glMatrixMode(GL_PROJECTION);
 160    glLoadIdentity();
 161    glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
 162    glMatrixMode(GL_MODELVIEW);
 163    glLoadIdentity();
 164 }
 165
 166
 167
 168 static void
 169 DrawQuad(unsigned count)
 170 {
 171    unsigned i;
 172    glClear(GL_COLOR_BUFFER_BIT);
 173
 174    for (i = 0; i < count; i++) {
 175       glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 176
 177       /* Avoid sending command buffers with huge numbers of fullscreen
 178        * quads.  Graphics schedulers don't always cope well with
 179        * this...
 180        */
 181       if (i % 128 == 0) {
 182          PerfSwapBuffers();
 183          glClear(GL_COLOR_BUFFER_BIT);
 184       }
 185    }
 186
 187    glFinish();
 188
 189    if (1)
 190       PerfSwapBuffers();
 191 }
 192
 193 void
 194 PerfNextRound(void)
 195 {
 196 }
 197
 198 /** Called from test harness/main */
 199 void
 200 PerfDraw(void)
 201 {
 202    double rate;
 203    double pixelsPerDraw = WinWidth * WinHeight;
 204
 205    Ortho();
 206
 207    /* simple fill */
 208    rate = PerfMeasureRate(DrawQuad) * pixelsPerDraw;
 209    perf_printf("   Simple fill: %s pixels/second\n",
 210                PerfHumanFloat(rate));
 211
 212    /* blended fill */
 213    glEnable(GL_BLEND);
 214    rate = PerfMeasureRate(DrawQuad) * pixelsPerDraw;
 215    glDisable(GL_BLEND);
 216    perf_printf("   Blended fill: %s pixels/second\n",
 217                PerfHumanFloat(rate));
 218
 219    /* textured fill */
 220    glEnable(GL_TEXTURE_2D);
 221    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 222    rate = PerfMeasureRate(DrawQuad) * pixelsPerDraw;
 223    glDisable(GL_TEXTURE_2D);
 224    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 225    perf_printf("   Textured fill: %s pixels/second\n",
 226                PerfHumanFloat(rate));
 227
 228    /* shader1 fill */
 229    glUseProgram(ShaderProg1);
 230    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 231    rate = PerfMeasureRate(DrawQuad) * pixelsPerDraw;
 232    glUseProgram(0);
 233    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 234    perf_printf("   Shader1 fill: %s pixels/second\n",
 235                PerfHumanFloat(rate));
 236
 237    /* shader2 fill */
 238    glUseProgram(ShaderProg2);
 239    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 240    rate = PerfMeasureRate(DrawQuad) * pixelsPerDraw;
 241    glUseProgram(0);
 242    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 243    perf_printf("   Shader2 fill: %s pixels/second\n",
 244                PerfHumanFloat(rate));
 245
 246    exit(0);
 247 }
 248