tests/shaders/fp-fragment-position.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 fragment.position.
  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 extern float piglit_tolerance[4];
  41
  42 #define NUM_PROGRAMS 4
  43
  44 static GLuint FragProg[NUM_PROGRAMS];
  45
  46 static const char* const ProgramText[NUM_PROGRAMS] = {
  47                 /* Color = fragment pos * scale factor */
  48                 "!!ARBfp1.0\n"
  49                 "PARAM factor = { 0.01, 0.01, 1.0, 0.2 };\n"
  50                 "MUL result.color, fragment.position, factor;\n"
  51                 "END",
  52
  53                 /* Color = dependent 2D texture read */
  54                 "!!ARBfp1.0\n"
  55                 "TEMP r0;\n"
  56                 "ALIAS scaled = r0;\n"
  57                 "MUL r0.xy, fragment.position, 0.01;\n"
  58                 "TEX result.color, scaled, texture[1], 2D;\n"
  59                 "END",
  60
  61                 /* Color = RECT texture color at fragment pos */
  62                 "!!ARBfp1.0\n"
  63                 "TEX result.color, fragment.position, texture[0], RECT;\n"
  64                 "END",
  65
  66                 /* Color = 2D texture color at fragment pos */
  67                 "!!ARBfp1.0\n"
  68                 "PARAM scale = { 0.01, 0.01, 1.0, 1.0 };\n"
  69                 "TEMP tc;\n"
  70                 "MUL tc, fragment.position, scale;\n"
  71                 "TEX result.color, tc, texture[1], 2D;\n"
  72                 "MOV result.color.w, 0.5;\n"
  73                 "END",
  74 };
  75
  76 /**
  77  * Draw four quadrilaterals, one for each fragment program:
  78  *  +--------+--------+
  79  *  |        |        |
  80  *  | Prog 1 | Prog 3 |
  81  *  |        |        |
  82  *  +--------+--------+
  83  *  |        |        |
  84  *  | Prog 0 | Prog 2 |
  85  *  |        |        |
  86  *  +--------+--------+
  87  * Each quad is about 100x100 pixels in size.
  88  */
  89 static void DoFrame(void)
  90 {
  91         glClearColor(0.3, 0.3, 0.3, 0.3);
  92         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  93
  94         glEnable(GL_FRAGMENT_PROGRAM_ARB);
  95
  96         glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, FragProg[0]);
  97
  98         glBegin(GL_QUADS);
  99                 glVertex3f(0, 0, 0);
 100                 glVertex3f(1, 0, 1);
 101                 glVertex3f(1, 1, 2);
 102                 glVertex3f(0, 1, 1);
 103         glEnd();
 104
 105         glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, FragProg[1]);
 106
 107         glBegin(GL_QUADS);
 108                 glVertex2f(0, 1);
 109                 glVertex2f(1, 1);
 110                 glVertex2f(1, 2);
 111                 glVertex2f(0, 2);
 112         glEnd();
 113
 114         glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, FragProg[2]);
 115
 116         glBegin(GL_QUADS);
 117                 glVertex2f(1, 0);
 118                 glVertex2f(2, 0);
 119                 glVertex2f(2, 1);
 120                 glVertex2f(1, 1);
 121         glEnd();
 122
 123         glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, FragProg[3]);
 124
 125         glBegin(GL_QUADS);
 126                 glVertex2f(1, 1);
 127                 glVertex2f(2, 1);
 128                 glVertex2f(2, 2);
 129                 glVertex2f(1, 2);
 130         glEnd();
 131
 132 }
 133
 134 static const struct {
 135         const char* name;
 136         float x, y;
 137         float expected[4];
 138 } Probes[] = {
 139         // Program 0
 140         {
 141                 "basic #1",
 142                 0.2, 0.2,
 143                 { 0.2, 0.2, (0.4+2)/8, 0.2 }
 144         },
 145         {
 146                 "basic #2",
 147                 0.8, 0.2,
 148                 { 0.8, 0.2, (1.0+2)/8, 0.2 }
 149         },
 150         {
 151                 "basic #3",
 152                 0.8, 0.8,
 153                 { 0.8, 0.8, (1.6+2)/8, 0.2 }
 154         },
 155         {
 156                 "basic #4",
 157                 0.2, 0.8,
 158                 { 0.2, 0.8, (1.0+2)/8, 0.2 }
 159         },
 160
 161         // Program 1
 162         {
 163                 "tex2d scaled #1",
 164                 0.2, 1.2,
 165                 { 0.8, 0.2, 0.2, 0.2 }
 166         },
 167         {
 168                 "tex2d scaled #2",
 169                 0.8, 1.2,
 170                 { 0.2, 0.2, 0.8, 0.5 }
 171         },
 172         {
 173                 "tex2d scaled #3",
 174                 0.8, 1.8,
 175                 { 0.2, 0.8, 0.8, 0.8 }
 176         },
 177         {
 178                 "tex2d scaled #4",
 179                 0.2, 1.8,
 180                 { 0.8, 0.8, 0.2, 0.5 }
 181         },
 182
 183         // Program 2
 184         {
 185                 "texrect #1",
 186                 1.2, 0.2,
 187                 { 0.53, 0.47, 0.08, 0.27 }
 188         },
 189         {
 190                 "texrect #2",
 191                 1.8, 0.2,
 192                 { 0.29, 0.70, 0.08, 0.40 }
 193         },
 194         {
 195                 "texrect #1",
 196                 1.8, 0.8,
 197                 { 0.29, 0.70, 0.31, 0.51 }
 198         },
 199         {
 200                 "texrect #1",
 201                 1.2, 0.8,
 202                 { 0.53, 0.47, 0.31, 0.39 }
 203         },
 204
 205         // Program 3
 206         {
 207                 "tex2d unscaled #1",
 208                 1.2, 1.2,
 209                 { 0.8, 0.2, 0.2, 0.5 }
 210         },
 211         {
 212                 "tex2d unscaled #2",
 213                 1.8, 1.2,
 214                 { 0.2, 0.2, 0.8, 0.5 }
 215         },
 216         {
 217                 "tex2d unscaled #3",
 218                 1.8, 1.8,
 219                 { 0.2, 0.8, 0.8, 0.5 }
 220         },
 221         {
 222                 "tex2d unscaled #4",
 223                 1.2, 1.8,
 224                 { 0.8, 0.8, 0.2, 0.5 }
 225         },
 226 };
 227
 228 static bool
 229 DoTest(void)
 230 {
 231         int i;
 232         bool pass = true;
 233
 234         for (i = 0; i < ARRAY_SIZE(Probes); i++) {
 235                 printf("Testing: %s\n", Probes[i].name);
 236                 pass = piglit_probe_pixel_rgba(Probes[i].x * piglit_width / 2,
 237                                                Probes[i].y * piglit_height / 2,
 238                                                Probes[i].expected) && pass;
 239         }
 240
 241         return pass;
 242 }
 243
 244
 245 enum piglit_result
 246 piglit_display(void)
 247 {
 248         int pass;
 249
 250         DoFrame();
 251         pass = DoTest();
 252
 253         if (!piglit_automatic)
 254                 piglit_present_results();
 255         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 256 }
 257
 258
 259 static void Reshape(int width, int height)
 260 {
 261         piglit_width = width;
 262         piglit_height = height;
 263         glViewport(0, 0, width, height);
 264         glMatrixMode(GL_PROJECTION);
 265         glLoadIdentity();
 266         glOrtho(0.0, 2.0, 0.0, 2.0, -2.0, 6.0);
 267         glScalef(1.0, 1.0, -1.0); // flip z-axis
 268         glMatrixMode(GL_MODELVIEW);
 269         glLoadIdentity();
 270 }
 271
 272 void
 273 piglit_init(int argc, char **argv)
 274 {
 275         int i, x, y;
 276         GLubyte rectangle[200][200][4];
 277         GLubyte tex[256*256][4];
 278         GLuint texobj[2];
 279
 280         /* Need GL 1.4 for GL_GENERATE_MIPMAP tex param */
 281         piglit_require_gl_version(14);
 282
 283         printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 284
 285         piglit_require_fragment_program();
 286
 287         piglit_tolerance[0] = 0.02;
 288         piglit_tolerance[1] = 0.02;
 289         piglit_tolerance[2] = 0.02;
 290         piglit_tolerance[3] = 0.02;
 291
 292         for(i = 0; i < NUM_PROGRAMS; ++i)
 293                 FragProg[i] = piglit_compile_program(GL_FRAGMENT_PROGRAM_ARB, ProgramText[i]);
 294
 295         /*
 296          * Texture unit 0: 200x200 RECTANGLE texture
 297          */
 298         for(y = 0; y < 200; ++y) {
 299                 for(x = 0; x < 200; ++x) {
 300                         rectangle[y][x][0] = 255-x;
 301                         rectangle[y][x][1] = x;
 302                         rectangle[y][x][2] = y;
 303                         rectangle[y][x][3] = (x+y)/2;
 304                 }
 305         }
 306
 307         glActiveTexture(GL_TEXTURE0);
 308         glGenTextures(2, texobj);
 309         glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texobj[0]);
 310         glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 200, 200, 0,
 311                      GL_RGBA, GL_UNSIGNED_BYTE, rectangle);
 312
 313         /*
 314          * Texture unit 1: 256x256 2D texture
 315          */
 316         for(y = 0; y < 256; ++y) {
 317                 for(x = 0; x < 256; ++x) {
 318                         tex[256*y+x][0] = 255-x;
 319                         tex[256*y+x][1] = y;
 320                         tex[256*y+x][2] = x;
 321                         tex[256*y+x][3] = (x+y)/2;
 322                 }
 323         }
 324
 325         glActiveTexture(GL_TEXTURE1);
 326         glBindTexture(GL_TEXTURE_2D, texobj[1]);
 327         glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
 328         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0,
 329                      GL_RGBA, GL_UNSIGNED_BYTE, tex);
 330
 331         // Overwrite higher mipmap levels
 332         for(x = 0; x < 4; ++x) {
 333                 tex[x][0] = 255;
 334                 tex[x][1] = 128;
 335                 tex[x][2] = 128;
 336                 tex[x][3] = 255;
 337         }
 338
 339         glTexImage2D(GL_TEXTURE_2D, 7, GL_RGBA, 2, 2, 0,
 340                      GL_RGBA, GL_UNSIGNED_BYTE, tex);
 341         glTexImage2D(GL_TEXTURE_2D, 8, GL_RGBA, 1, 1, 0,
 342                      GL_RGBA, GL_UNSIGNED_BYTE, tex);
 343
 344         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
 345         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 346
 347         Reshape(piglit_width, piglit_height);
 348 }