tests/texturing/fxt1-teximage.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   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 (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 NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Chris Lord <chris@openedhand.com>
  25  *    Eric Anholt <eric@anholt.net>
  26  *
  27  */
  28
  29 /** @file fxt1-teximage.c
  30  *
  31  * Tests that a full 3DFX FXT1-compressed mipmap tree can be created
  32  * and used.
  33  */
  34
  35 #include "piglit-util-gl.h"
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38
  39         config.supports_gl_compat_version = 10;
  40
  41         config.window_width = 300;
  42         config.window_height = 300;
  43         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  44         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  45
  46 PIGLIT_GL_TEST_CONFIG_END
  47
  48 #define SIZE 128
  49
  50 const float red[4] =   {1.0, 0.0, 0.0, 1.0};
  51 const float green[4] = {0.0, 1.0, 0.0, 1.0};
  52 const float blue[4] =  {0.0, 0.0, 1.0, 1.0};
  53 const float white[4] = {1.0, 1.0, 1.0, 1.0};
  54
  55 static void
  56 display_mipmaps(int start_x, int start_y)
  57 {
  58         int i;
  59
  60         glEnable(GL_TEXTURE_2D);
  61
  62         /* Display all the mipmap levels */
  63         for (i = SIZE; i > 0; i /= 2) {
  64                 glBegin(GL_QUADS);
  65                 glTexCoord2f(0.0, 0.0); glVertex2f(start_x + 0, start_y + 0);
  66                 glTexCoord2f(1.0, 0.0); glVertex2f(start_x + i, start_y + 0);
  67                 glTexCoord2f(1.0, 1.0); glVertex2f(start_x + i, start_y + i);
  68                 glTexCoord2f(0.0, 1.0); glVertex2f(start_x + 0, start_y + i);
  69                 glEnd();
  70
  71                 start_x += i + 5;
  72         }
  73 }
  74
  75
  76 static GLboolean
  77 check_resulting_mipmaps(int x, int y)
  78 {
  79         GLboolean pass = GL_TRUE;
  80         int size;
  81
  82         for (size = SIZE; size > 0; size /= 2) {
  83                 if (size == 4)
  84                         pass = pass && piglit_probe_pixel_rgb(x + 2, y + 2,
  85                                                               red);
  86                 else if (size == 2)
  87                         pass = pass && piglit_probe_pixel_rgb(x + 1, y + 1,
  88                                                               green);
  89                 else if (size == 1)
  90                         pass = pass && piglit_probe_pixel_rgb(x, y,
  91                                                               blue);
  92                 else {
  93                         pass = pass && piglit_probe_pixel_rgb(x + size / 4,
  94                                                               y + size / 4,
  95                                                               red);
  96                         pass = pass && piglit_probe_pixel_rgb(x + size * 3 / 4,
  97                                                               y + size / 4,
  98                                                               green);
  99                         pass = pass && piglit_probe_pixel_rgb(x + size / 4,
 100                                                               y + size * 3 / 4,
 101                                                               blue);
 102                         pass = pass && piglit_probe_pixel_rgb(x + size * 3 / 4,
 103                                                               y + size * 3 / 4,
 104                                                               white);
 105                 }
 106                 x += size + 5;
 107         }
 108
 109         return pass;
 110 }
 111
 112 enum piglit_result
 113 piglit_display(void)
 114 {
 115         GLuint tex;
 116         GLboolean pass = GL_TRUE;
 117
 118         glClearColor(0, 0, 0, 0);
 119         glClear(GL_COLOR_BUFFER_BIT);
 120
 121         tex = piglit_rgbw_texture(GL_COMPRESSED_RGB_FXT1_3DFX, SIZE, SIZE,
 122                                   GL_TRUE, GL_FALSE, GL_UNSIGNED_NORMALIZED);
 123         display_mipmaps(10, 10 + (10 + SIZE) * 0);
 124         glDeleteTextures(1, &tex);
 125         tex = piglit_rgbw_texture(GL_COMPRESSED_RGBA_FXT1_3DFX, SIZE, SIZE,
 126                                   GL_TRUE, GL_FALSE, GL_UNSIGNED_NORMALIZED);
 127         display_mipmaps(10, 10 + (10 + SIZE) * 1);
 128         glDeleteTextures(1, &tex);
 129
 130         pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 0);
 131         pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 1);
 132
 133         piglit_present_results();
 134
 135         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 136 }
 137
 138 void
 139 piglit_init(int argc, char **argv)
 140 {
 141         piglit_require_extension("GL_3DFX_texture_compression_FXT1");
 142
 143         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 144 }