tests/shaders/fp-incomplete-tex.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  * According to the ARB_fragment_program spec, section 3.11.6,
  26  * sampling an incomplete texture image yields (0,0,0,1).
  27  */
  28
  29 #include "piglit-util.h"
  30
  31 int piglit_width = 100, piglit_height = 100;
  32 int piglit_window_mode = GLUT_RGBA | GLUT_ALPHA | GLUT_DOUBLE | GLUT_DEPTH;
  33
  34 #define NUM_PROGRAMS 5
  35
  36 static GLuint FragProg[NUM_PROGRAMS];
  37
  38 static const char* const ProgramText[NUM_PROGRAMS] = {
  39                 "!!ARBfp1.0\n"
  40                 "TEX result.color, fragment.color, texture[0], 2D;\n"
  41                 "END",
  42
  43                 "!!ARBfp1.0\n"
  44                 "TEX result.color, fragment.color, texture[0], 3D;\n"
  45                 "END",
  46
  47                 "!!ARBfp1.0\n"
  48                 "TEX result.color, fragment.color, texture[0], 1D;\n"
  49                 "END",
  50
  51                 "!!ARBfp1.0\n"
  52                 "TEX result.color, fragment.color, texture[0], CUBE;\n"
  53                 "END",
  54
  55                 "!!ARBfp1.0\n"
  56                 "TEX result.color, fragment.color, texture[0], RECT;\n"
  57                 "END"
  58 };
  59
  60 static void DoFrame(void)
  61 {
  62         int i;
  63
  64         glClearColor(0.3, 0.3, 0.3, 0.3);
  65         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  66
  67         glEnable(GL_FRAGMENT_PROGRAM_ARB);
  68
  69         for(i = 0; i < NUM_PROGRAMS; ++i) {
  70                 glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, FragProg[i]);
  71
  72                 glPushMatrix();
  73                 glTranslatef(i/2, i%2, 0);
  74                 glBegin(GL_QUADS);
  75                         glVertex2f(0, 0);
  76                         glVertex2f(1, 0);
  77                         glVertex2f(1, 1);
  78                         glVertex2f(0, 1);
  79                 glEnd();
  80                 glPopMatrix();
  81         }
  82
  83         glutSwapBuffers();
  84 }
  85
  86 static const struct {
  87         const char* name;
  88         float x, y;
  89         float expected[4];
  90 } Probes[] = {
  91         {
  92                 "incomplete 2D",
  93                 0.5, 0.5,
  94                 { 0,0,0,1 }
  95         },
  96         {
  97                 "incomplete 3D",
  98                 0.5, 1.5,
  99                 { 0,0,0,1 }
 100         },
 101         {
 102                 "incomplete 1D",
 103                 1.5, 0.5,
 104                 { 0,0,0,1 }
 105         },
 106         {
 107                 "incomplete CUBE",
 108                 1.5, 1.5,
 109                 { 0,0,0,1 }
 110         },
 111         {
 112                 "incomplete RECT",
 113                 2.5, 0.5,
 114                 { 0,0,0,1 }
 115         },
 116
 117         {
 118                 "sanity",
 119                 2.5, 1.5,
 120                 { 0.3,0.3,0.3,0.3 }
 121         },
 122
 123         // Sentinel!
 124         {
 125                 0,
 126                 0, 0,
 127                 { 0, 0, 0, 0 }
 128         }
 129 };
 130
 131 static int DoTest( void )
 132 {
 133         int idx;
 134         GLfloat dmax;
 135
 136         glReadBuffer( GL_FRONT );
 137         dmax = 0;
 138
 139         idx = 0;
 140         while(Probes[idx].name) {
 141                 GLfloat probe[4];
 142                 GLfloat delta[4];
 143                 int i;
 144
 145                 glReadPixels((int)(Probes[idx].x * piglit_width / 3),
 146                              (int)(Probes[idx].y * piglit_height / 2),
 147                              1, 1,
 148                 GL_RGBA, GL_FLOAT, probe);
 149
 150                 printf("%20s (%3.1f,%3.1f): %f,%f,%f,%f",
 151                        Probes[idx].name,
 152                        Probes[idx].x, Probes[idx].y,
 153                        probe[0], probe[1], probe[2], probe[3]);
 154
 155                 for(i = 0; i < 4; ++i) {
 156                         delta[i] = probe[i] - Probes[idx].expected[i];
 157
 158                         if (delta[i] > dmax) dmax = delta[i];
 159                         else if (-delta[i] > dmax) dmax = -delta[i];
 160                 }
 161
 162                 printf("   Delta: %f,%f,%f,%f\n", delta[0], delta[1], delta[2], delta[3]);
 163
 164                 idx++;
 165         }
 166
 167         printf("Max delta: %f\n", dmax);
 168
 169         if (dmax >= 0.02)
 170                 return 0;
 171         else
 172                 return 1;
 173 }
 174
 175
 176 enum piglit_result
 177 piglit_display(void)
 178 {
 179         int pass;
 180
 181         DoFrame();
 182         pass = DoTest();
 183
 184         return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
 185 }
 186
 187
 188 static void Reshape(int width, int height)
 189 {
 190         piglit_width = width;
 191         piglit_height = height;
 192         glViewport(0, 0, width, height);
 193         glMatrixMode(GL_PROJECTION);
 194         glLoadIdentity();
 195         glOrtho(0.0, 3.0, 0.0, 2.0, -2.0, 6.0);
 196         glScalef(1.0, 1.0, -1.0); // flip z-axis
 197         glMatrixMode(GL_MODELVIEW);
 198         glLoadIdentity();
 199 }
 200
 201 void
 202 piglit_init(int argc, char **argv)
 203 {
 204         int i;
 205
 206         printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 207
 208         glutReshapeFunc(Reshape);
 209
 210         piglit_require_fragment_program();
 211
 212         for(i = 0; i < NUM_PROGRAMS; ++i)
 213                 FragProg[i] = piglit_compile_program(GL_FRAGMENT_PROGRAM_ARB, ProgramText[i]);
 214
 215         Reshape(piglit_width, piglit_height);
 216 }
 217