tests/texturing/s3tc-texsubimage.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 s3tc-teximage.c
  30  *
  31  * Tests that a full S3TC-compressed mipmap tree can be created and
  32  * used.
  33  */
  34
  35 #include "piglit-util-gl.h"
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38
  39 #ifdef PIGLIT_USE_OPENGL
  40         config.supports_gl_compat_version = 11;
  41 #else // PIGLIT_USE_OPENGL_ES2
  42         config.supports_gl_es_version = 20;
  43 #endif
  44
  45         config.window_width = 500;
  46         config.window_height = 600;
  47         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  48         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  49
  50 PIGLIT_GL_TEST_CONFIG_END
  51
  52 #define SIZE 128
  53
  54 const float red[4] =   {1.0, 0.0, 0.0, 1.0};
  55 const float green[4] = {0.0, 1.0, 0.0, 1.0};
  56 const float blue[4] =  {0.0, 0.0, 1.0, 1.0};
  57 const float white[4] = {1.0, 1.0, 1.0, 1.0};
  58
  59 #ifdef  PIGLIT_USE_OPENGL_ES2
  60
  61 const char *vs_source =
  62         "#version 100\n"
  63         "attribute vec4 piglit_vertex;\n"
  64         "attribute vec2 piglit_texcoord;\n"
  65         "varying mediump vec2 tex_coord;\n"
  66         "uniform mat4 proj;\n"
  67         "\n"
  68         "void main()\n"
  69         "{\n"
  70         "        gl_Position = proj * piglit_vertex;\n"
  71         "        tex_coord = piglit_texcoord;\n"
  72         "}\n";
  73
  74 const char *fs_source =
  75         "#version 100\n"
  76         "varying mediump vec2 tex_coord;\n"
  77         "uniform sampler2D tex;\n"
  78         "\n"
  79         "void main()\n"
  80         "{\n"
  81         "        gl_FragColor = texture2D(tex, tex_coord);\n"
  82         "}\n";
  83
  84 #include "piglit-matrix.h"
  85
  86 GLint tex_program;
  87
  88 #endif
  89
  90 static void
  91 display_mipmaps(int start_x, int start_y)
  92 {
  93         int i;
  94
  95 #ifdef PIGLIT_USE_OPENGL
  96         glEnable(GL_TEXTURE_2D);
  97 #endif
  98
  99         /* Display all the mipmap levels */
 100         for (i = SIZE; i > 0; i /= 2) {
 101                 piglit_draw_rect_tex(start_x, start_y, i, i,
 102                                      0.0f, 0.0f, 1.0f, 1.0f);
 103                 start_x += i + 5;
 104         }
 105 }
 106
 107 static GLuint
 108 create_texture(GLenum format)
 109 {
 110         GLfloat *data;
 111         int size, x, y, level;
 112         GLuint tex;
 113
 114         glGenTextures(1, &tex);
 115         glBindTexture(GL_TEXTURE_2D, tex);
 116         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 117         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 118         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 119         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 120                         GL_LINEAR_MIPMAP_NEAREST);
 121         data = malloc(SIZE * SIZE * 4 * sizeof(GLfloat));
 122
 123         for (level = 0, size = SIZE; size > 0; level++, size >>= 1) {
 124                 for (y = 0; y < size; y++) {
 125                         for (x = 0; x < size; x++) {
 126                                 const float *color;
 127
 128                                 if (size == 4)
 129                                         color = red;
 130                                 else if (size == 2)
 131                                         color = green;
 132                                 else if (size == 1)
 133                                         color = blue;
 134                                 else if (x < size / 2 && y < size / 2)
 135                                         color = red;
 136                                 else if (y < size / 2)
 137                                         color = green;
 138                                 else if (x < size / 2)
 139                                         color = blue;
 140                                 else
 141                                         color = white;
 142
 143                                 memcpy(data + (y * size + x) * 4, color,
 144                                        4 * sizeof(float));
 145                         }
 146                 }
 147
 148                 /* Create empty texture */
 149                 glTexImage2D(GL_TEXTURE_2D, level, format,
 150                              size, size, 0,
 151                              GL_RGBA, GL_FLOAT, NULL);
 152
 153                 glPixelStorei(GL_UNPACK_ROW_LENGTH, size);
 154
 155                 /* Fill in sub regions of texture */
 156                 if (size <= 4) {
 157                         glTexSubImage2D(GL_TEXTURE_2D, level,
 158                                         0, 0, size, size,
 159                                         GL_RGBA, GL_FLOAT, data);
 160                 } else {
 161                         float *reds = data;
 162                         float *greens = data + size / 2 * 4;
 163                         float *blues = reds + (size / 2) * size * 4;
 164                         float *whites = blues + size / 2 * 4;
 165
 166                         glTexSubImage2D(GL_TEXTURE_2D, level,
 167                                         0, 0,
 168                                         size / 2, size / 2,
 169                                         GL_RGBA, GL_FLOAT, reds);
 170                         glTexSubImage2D(GL_TEXTURE_2D, level,
 171                                         size / 2, 0,
 172                                         size / 2, size / 2,
 173                                         GL_RGBA, GL_FLOAT, greens);
 174                         glTexSubImage2D(GL_TEXTURE_2D, level,
 175                                         0, size / 2,
 176                                         size / 2, size / 2,
 177                                         GL_RGBA, GL_FLOAT, blues);
 178                         glTexSubImage2D(GL_TEXTURE_2D, level,
 179                                         size / 2, size / 2,
 180                                         size / 2, size / 2,
 181                                         GL_RGBA, GL_FLOAT, whites);
 182                 }
 183         }
 184         free(data);
 185         return tex;
 186 }
 187
 188 static GLboolean
 189 check_resulting_mipmaps(int x, int y)
 190 {
 191         GLboolean pass = GL_TRUE;
 192         int size;
 193
 194         for (size = SIZE; size > 0; size /= 2) {
 195                 if (size == 4)
 196                         pass = pass && piglit_probe_pixel_rgb(x + 2, y + 2,
 197                                                               red);
 198                 else if (size == 2)
 199                         pass = pass && piglit_probe_pixel_rgb(x + 1, y + 1,
 200                                                               green);
 201                 else if (size == 1)
 202                         pass = pass && piglit_probe_pixel_rgb(x, y,
 203                                                               blue);
 204                 else {
 205                         pass = pass && piglit_probe_pixel_rgb(x + size / 4,
 206                                                               y + size / 4,
 207                                                               red);
 208                         pass = pass && piglit_probe_pixel_rgb(x + size * 3 / 4,
 209                                                               y + size / 4,
 210                                                               green);
 211                         pass = pass && piglit_probe_pixel_rgb(x + size / 4,
 212                                                               y + size * 3 / 4,
 213                                                               blue);
 214                         pass = pass && piglit_probe_pixel_rgb(x + size * 3 / 4,
 215                                                               y + size * 3 / 4,
 216                                                               white);
 217                 }
 218                 x += size + 5;
 219         }
 220
 221         return pass;
 222 }
 223
 224 enum piglit_result
 225 piglit_display(void)
 226 {
 227         GLuint tex;
 228         GLboolean pass = GL_TRUE;
 229
 230         glClearColor(0, 0, 0, 0);
 231         glClear(GL_COLOR_BUFFER_BIT);
 232
 233         tex = create_texture(GL_COMPRESSED_RGB_S3TC_DXT1_EXT);
 234         display_mipmaps(10, 10 + (10 + SIZE) * 0);
 235         glDeleteTextures(1, &tex);
 236         tex = create_texture(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT);
 237         display_mipmaps(10, 10 + (10 + SIZE) * 1);
 238         glDeleteTextures(1, &tex);
 239         tex = create_texture(GL_COMPRESSED_RGBA_S3TC_DXT3_EXT);
 240         display_mipmaps(10, 10 + (10 + SIZE) * 2);
 241         glDeleteTextures(1, &tex);
 242         tex = create_texture(GL_COMPRESSED_RGBA_S3TC_DXT5_EXT);
 243         display_mipmaps(10, 10 + (10 + SIZE) * 3);
 244         glDeleteTextures(1, &tex);
 245
 246         pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 0);
 247         pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 1);
 248         pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 2);
 249         pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 3);
 250
 251         piglit_present_results();
 252
 253         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 254 }
 255
 256 void
 257 piglit_init(int argc, char **argv)
 258 {
 259         piglit_require_extension("GL_EXT_texture_compression_s3tc");
 260
 261 #ifdef PIGLIT_USE_OPENGL
 262
 263         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 264
 265 #else // PIGLIT_USE_OPENGL_ES2
 266
 267         tex_program = piglit_build_simple_program(vs_source, fs_source);
 268         glUseProgram(tex_program);
 269         GLint proj_loc = glGetUniformLocation(tex_program, "proj");
 270         piglit_ortho_uniform(proj_loc, piglit_width, piglit_height);
 271
 272 #endif
 273 }