tests/shaders/fp-lit-mask.c

   1 /*
   2  * Copyright (c) The Piglit project 2007
   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  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  18  * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * Test whether LIT honours the output mask.
  26  */
  27
  28 #include "piglit-util-gl.h"
  29
  30 PIGLIT_GL_TEST_CONFIG_BEGIN
  31
  32         config.supports_gl_compat_version = 10;
  33
  34         config.window_width = 200;
  35         config.window_height = 200;
  36         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_DEPTH;
  37
  38 PIGLIT_GL_TEST_CONFIG_END
  39
  40 static GLuint FragProg[15];
  41
  42 static const char fragProgramTemplate[] =
  43         "!!ARBfp1.0\n"
  44         "PARAM values = { 0.65, 0.9, 0.0, 8.0 }; \n"
  45         "PARAM bogus = { 0.8, 0.8, 0.8, 0.8 }; \n"
  46         "MOV result.color, bogus; \n"
  47         "LIT result.color.%s, values; \n"
  48         "END\n";
  49 static float LitExpected[4] = { 1.0, 0.65, 0.433, 1.0 };
  50
  51 static void DoFrame(void)
  52 {
  53         int mask;
  54
  55         glClearColor(0.0, 0.0, 0.0, 0.0);
  56         glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
  57
  58         glEnable(GL_FRAGMENT_PROGRAM_ARB);
  59
  60         for(mask = 1; mask < 16; ++mask) {
  61                 glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, FragProg[mask-1]);
  62                 glPushMatrix();
  63                 glTranslatef((mask % 4), (mask / 4), 0.0);
  64
  65                 glBegin(GL_QUADS);
  66                         glVertex2f(0, 0);
  67                         glVertex2f(1, 0);
  68                         glVertex2f(1, 1);
  69                         glVertex2f(0, 1);
  70                 glEnd();
  71
  72                 glPopMatrix();
  73         }
  74 }
  75
  76 static int DoTest( void )
  77 {
  78         int mask;
  79         GLfloat dmax;
  80
  81         dmax = 0;
  82
  83         for(mask = 1; mask < 16; ++mask) {
  84                 GLfloat probe[4];
  85                 GLfloat delta[4];
  86                 int i;
  87
  88                 glReadPixels(piglit_width * (2*(mask%4)+1)/8,
  89                              piglit_height * (2*(mask/4)+1)/8, 1, 1,
  90                                 GL_RGBA, GL_FLOAT, probe);
  91
  92                 printf("Probe %i: %f,%f,%f,%f\n", mask, probe[0], probe[1], probe[2], probe[3]);
  93
  94                 for(i = 0; i < 4; ++i) {
  95                         if (mask & (1 << i))
  96                                 delta[i] = probe[i] - LitExpected[i];
  97                         else
  98                                 delta[i] = probe[i] - 0.8;
  99
 100                         if (delta[i] > dmax) dmax = delta[i];
 101                         else if (-delta[i] > dmax) dmax = -delta[i];
 102                 }
 103
 104                 printf("   Delta: %f,%f,%f,%f\n", delta[0], delta[1], delta[2], delta[3]);
 105         }
 106
 107         printf("Max delta: %f\n", dmax);
 108
 109         if (dmax >= 0.02)
 110                 return 0;
 111         else
 112                 return 1;
 113 }
 114
 115 enum piglit_result
 116 piglit_display(void)
 117 {
 118         int pass;
 119
 120         DoFrame();
 121         pass = DoTest();
 122         piglit_present_results();
 123
 124         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 125 }
 126
 127 void piglit_init(int argc, char **argv)
 128 {
 129         int mask;
 130
 131         printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 132
 133         piglit_require_fragment_program();
 134
 135         /*
 136          * Fragment programs
 137          */
 138         for(mask = 1; mask < 16; ++mask) {
 139                 char programText[1024];
 140                 char maskstring[5];
 141
 142                 maskstring[0] = 0;
 143                 if (mask & 1) strcat(maskstring, "x");
 144                 if (mask & 2) strcat(maskstring, "y");
 145                 if (mask & 4) strcat(maskstring, "z");
 146                 if (mask & 8) strcat(maskstring, "w");
 147                 sprintf(programText, fragProgramTemplate, maskstring);
 148
 149                 FragProg[mask-1] = piglit_compile_program(GL_FRAGMENT_PROGRAM_ARB, programText);
 150         }
 151
 152         piglit_ortho_projection(4.0, 4.0, GL_FALSE);
 153 }