tests/shaders/glsl-fs-texturecube-2.c

   1 /*
   2  * Copyright © 2010 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  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 /** @file glsl-fs-texturecube-2.c
  29  *
  30  * Tests that cubemap coordinates are appropriately normalized for
  31  * sampling.
  32  */
  33
  34 #include "piglit-util-gl.h"
  35
  36 #define SIZE 32
  37
  38 PIGLIT_GL_TEST_CONFIG_BEGIN
  39
  40         config.supports_gl_compat_version = 10;
  41
  42         config.window_width = SIZE*6;
  43         config.window_height = SIZE;
  44         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  45
  46 PIGLIT_GL_TEST_CONFIG_END
  47
  48 static GLint prog;
  49
  50 static GLfloat colors[][3] = {
  51         {1.0, 1.0, 1.0},
  52         {1.0, 1.0, 0.0},
  53         {1.0, 0.0, 0.0},
  54         {1.0, 0.0, 1.0},
  55         {0.0, 0.0, 1.0},
  56         {0.0, 1.0, 1.0},
  57         {0.0, 1.0, 0.0},
  58 };
  59
  60
  61 static void
  62 set_face_image(GLenum face, int color)
  63 {
  64         GLfloat *color1 = colors[color];
  65         GLfloat *color2 = colors[(color + 1) % ARRAY_SIZE(colors)];
  66         GLfloat *tex;
  67         int x, y;
  68
  69         tex = malloc(SIZE * SIZE * 3 * sizeof(GLfloat));
  70
  71         /* Set the texture for this face the edge pixels being color1
  72          * and everything else being color2.
  73          */
  74         for (y = 0; y < SIZE; y++) {
  75                 for (x = 0; x < SIZE; x++) {
  76                         GLfloat *chosen_color;
  77
  78                         if (x == 0 || x == SIZE - 1 || y == 0 || y == SIZE - 1)
  79                                 chosen_color = color1;
  80                         else
  81                                 chosen_color = color2;
  82
  83                         tex[(y * SIZE + x) * 3 + 0] = chosen_color[0];
  84                         tex[(y * SIZE + x) * 3 + 1] = chosen_color[1];
  85                         tex[(y * SIZE + x) * 3 + 2] = chosen_color[2];
  86                 }
  87         }
  88
  89         glTexImage2D(face, 0, GL_RGB, SIZE, SIZE, 0, GL_RGB, GL_FLOAT, tex);
  90
  91         free(tex);
  92 }
  93
  94
  95 enum piglit_result
  96 piglit_display(void)
  97 {
  98         GLboolean pass = GL_TRUE;
  99         GLuint tex;
 100         int face;
 101         static GLboolean scale = GL_TRUE;
 102
 103         /* Rescale the coordinates to catch failure on hw that needs
 104          * normalization of coords.
 105          */
 106         if (scale) {
 107                 for (face = 0; face < 6; face++) {
 108                         int i;
 109
 110                         for (i = 0; i < 4; i++) {
 111                                 float s = 4;
 112                                 cube_face_texcoords[face][i][0] *= s;
 113                                 cube_face_texcoords[face][i][1] *= s;
 114                                 cube_face_texcoords[face][i][2] *= s;
 115                         }
 116                 }
 117                 scale = GL_FALSE;
 118         }
 119
 120         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 121
 122         /* Create the texture. */
 123         glGenTextures(1, &tex);
 124         glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, tex);
 125
 126         glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB,
 127                         GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 128         glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB,
 129                         GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 130         glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB,
 131                         GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 132         glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB,
 133                         GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 134
 135         /* Fill in faces on each level */
 136         for (face = 0; face < 6; face++) {
 137                 set_face_image(cube_face_targets[face], face);
 138         }
 139
 140         glEnable(GL_TEXTURE_CUBE_MAP_ARB);
 141
 142         for (face = 0; face < 6; face++) {
 143                 int x1 = piglit_width * face / 6;
 144                 int x2 = piglit_width * (face + 1) / 6;
 145                 int y1 = 0;
 146                 int y2 = piglit_height;
 147
 148                 glBegin(GL_QUADS);
 149
 150                 glTexCoord3fv(cube_face_texcoords[face][0]);
 151                 glVertex2f(x1, y1);
 152
 153                 glTexCoord3fv(cube_face_texcoords[face][1]);
 154                 glVertex2f(x2, y1);
 155
 156                 glTexCoord3fv(cube_face_texcoords[face][2]);
 157                 glVertex2f(x2, y2);
 158
 159                 glTexCoord3fv(cube_face_texcoords[face][3]);
 160                 glVertex2f(x1, y2);
 161
 162                 glEnd();
 163         }
 164
 165         for (face = 0; face < 6; face++) {
 166                 GLfloat *color1 = colors[face];
 167                 GLfloat *color2 = colors[(face + 1) % ARRAY_SIZE(colors)];
 168                 int fx = face * SIZE;
 169                 int x, y;
 170
 171                 if (piglit_width != SIZE * 6 || piglit_height != SIZE)
 172                         break;
 173
 174                 for (y = 0; y < SIZE; y++) {
 175                         for (x = 0; x < SIZE; x++) {
 176                                 float *color;
 177
 178                                 if (x == 0 || y == 0 ||
 179                                     x == SIZE - 1 || y == SIZE - 1) {
 180                                         color = color1;
 181                                 } else {
 182                                         color = color2;
 183                                 }
 184
 185                                 pass = pass && piglit_probe_pixel_rgb(fx + x,
 186                                                                       y,
 187                                                                       color);
 188                         }
 189                 }
 190         }
 191
 192         glDeleteTextures(1, &tex);
 193
 194         piglit_present_results();
 195
 196         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 197 }
 198
 199 void piglit_init(int argc, char **argv)
 200 {
 201         GLint vs, fs;
 202         int loc;
 203         GLboolean bias = GL_FALSE;
 204         char *fs_name;
 205         int i = 0;
 206
 207         for (i = 0; i < argc; i++) {
 208                 if (!strcmp(argv[i], "-bias"))
 209                         bias = GL_TRUE;
 210         }
 211
 212         piglit_require_gl_version(20);
 213         piglit_require_extension("GL_ARB_texture_cube_map");
 214
 215         vs = piglit_compile_shader(GL_VERTEX_SHADER,
 216                                    "shaders/glsl-tex-mvp.vert");
 217         if (bias) {
 218                 fs_name = "shaders/glsl-fs-texturecube-bias.frag";
 219         } else {
 220                 fs_name = "shaders/glsl-fs-texturecube.frag";
 221         }
 222         fs = piglit_compile_shader(GL_FRAGMENT_SHADER, fs_name);
 223
 224         prog = piglit_link_simple_program(vs, fs);
 225         if (!piglit_link_check_status(prog))
 226                 piglit_report_result(PIGLIT_FAIL);
 227
 228         glUseProgram(prog);
 229
 230         loc = glGetUniformLocation(prog, "sampler");
 231         glUniform1i(loc, 0);
 232 }