tests/spec/arb_texture_cube_map_array/fbo-cubemap-array.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   3  * Copyright (c) 2010 VMware, Inc.
   4  * Copyright © 2012 Red Hat Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  23  * IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *     Dave Airlie
  27  *
  28  */
  29
  30 /** @file fbo-cubemap-array.c
  31  *
  32  * Tests that drawing to each level of an cubemap array texture FBO and then
  33  * drawing views * of those individual layerfaces to the window system framebuffer succeeds.
  34  * based on fbo-array.c
  35  */
  36
  37 #include "piglit-util-gl.h"
  38
  39 #define BUF_WIDTH 32
  40 #define BUF_HEIGHT 32
  41
  42 PIGLIT_GL_TEST_CONFIG_BEGIN
  43
  44     config.supports_gl_compat_version = 10;
  45
  46     config.window_width = 200;
  47     config.window_height = 100;
  48     config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
  49     config.khr_no_error_support = PIGLIT_NO_ERRORS;
  50
  51 PIGLIT_GL_TEST_CONFIG_END
  52
  53 #define NUM_FACES       6
  54 #define NUM_LAYERS      3
  55
  56 float layer_color[NUM_LAYERS * NUM_FACES][4] = {
  57         {1.0, 0.0, 0.0, 0.0},
  58         {0.0, 1.0, 0.0, 0.0},
  59         {0.0, 0.0, 1.0, 0.0},
  60         {1.0, 0.0, 1.0, 0.0},
  61         {1.0, 1.0, 0.0, 0.0},
  62         {0.0, 1.0, 1.0, 0.0},
  63
  64         {0.0, 1.0, 1.0, 0.0},
  65         {1.0, 0.0, 0.0, 0.0},
  66         {0.0, 1.0, 0.0, 0.0},
  67         {0.0, 0.0, 1.0, 0.0},
  68         {1.0, 0.0, 1.0, 0.0},
  69         {1.0, 1.0, 0.0, 0.0},
  70
  71         {1.0, 1.0, 0.0, 0.0},
  72         {0.0, 1.0, 1.0, 0.0},
  73         {1.0, 0.0, 0.0, 0.0},
  74         {0.0, 1.0, 0.0, 0.0},
  75         {0.0, 0.0, 1.0, 0.0},
  76         {1.0, 0.0, 1.0, 0.0},
  77 };
  78
  79 int num_layers = NUM_LAYERS * NUM_FACES;
  80
  81 static const char *prog = "fbo-cubemap-array";
  82
  83 static const char *frag_shader_cube_array_text =
  84    "#version 130\n"
  85    "#extension GL_ARB_texture_cube_map_array : enable \n"
  86    "uniform samplerCubeArray tex; \n"
  87    "void main() \n"
  88    "{ \n"
  89    "   gl_FragColor = texture(tex, gl_TexCoord[0]); \n"
  90    "} \n";
  91
  92 static GLuint program_cube_array;
  93
  94 static int
  95 create_array_fbo(void)
  96 {
  97         GLuint tex, fb;
  98         GLenum status;
  99         int layer;
 100
 101         glGenTextures(1, &tex);
 102         glBindTexture(GL_TEXTURE_CUBE_MAP_ARRAY_ARB, tex);
 103         if (!piglit_check_gl_error(GL_NO_ERROR))
 104                 piglit_report_result(PIGLIT_FAIL);
 105
 106         /* allocate empty array texture */
 107         glTexImage3D(GL_TEXTURE_CUBE_MAP_ARRAY_ARB, 0, GL_RGBA,
 108                      BUF_WIDTH, BUF_HEIGHT, num_layers,
 109                      0,
 110                      GL_RGBA, GL_UNSIGNED_BYTE, NULL);
 111         if (!piglit_check_gl_error(GL_NO_ERROR))
 112                 piglit_report_result(PIGLIT_FAIL);
 113
 114         glGenFramebuffersEXT(1, &fb);
 115         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
 116
 117         /* draw something into each layer of the array texture */
 118         for (layer = 0; layer < num_layers; layer++) {
 119                 glFramebufferTextureLayer(GL_FRAMEBUFFER_EXT,
 120                                              GL_COLOR_ATTACHMENT0_EXT,
 121                                              tex,
 122                                              0,
 123                                              layer);
 124
 125                 if (!piglit_check_gl_error(GL_NO_ERROR))
 126                         piglit_report_result(PIGLIT_FAIL);
 127
 128                 status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
 129                 if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 130                         fprintf(stderr, "%s: FBO incomplete\n", prog);
 131                         piglit_report_result(PIGLIT_SKIP);
 132                 }
 133
 134                 glViewport(0, 0, BUF_WIDTH, BUF_HEIGHT);
 135                 piglit_ortho_projection(BUF_WIDTH, BUF_HEIGHT, GL_FALSE);
 136
 137                 /* solid color quad */
 138                 glColor4fv(layer_color[layer]);
 139                 piglit_draw_rect(-2, -2, BUF_WIDTH + 2, BUF_HEIGHT + 2);
 140         }
 141
 142         glDeleteFramebuffersEXT(1, &fb);
 143         return tex;
 144 }
 145
 146 GLfloat a_cube_face_texcoords[6][4][4];
 147
 148 void setup_texcoords(void)
 149 {
 150         int i, j;
 151         for (i = 0; i < 6; i++) {
 152                 for (j = 0; j < 4; j++) {
 153                         memcpy(a_cube_face_texcoords[i][j], cube_face_texcoords[i][j], 3 * sizeof(GLfloat));
 154                 }
 155         }
 156 }
 157
 158 /* Draw a textured quad, sampling only the given layerface of the
 159  * array texture.
 160  */
 161 static void
 162 draw_layer(int x, int y, int layerface)
 163 {
 164         GLint face = layerface % 6;
 165         GLint layer = layerface / 6;
 166         GLint loc;
 167
 168         glUseProgram(program_cube_array);
 169         loc = glGetUniformLocation(program_cube_array, "tex");
 170         glUniform1i(loc, 0); /* texture unit p */
 171
 172         glViewport(0, 0, piglit_width, piglit_height);
 173         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 174
 175         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 176
 177         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 178         glTexParameteri(GL_TEXTURE_CUBE_MAP_ARRAY_ARB, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 179         glTexParameteri(GL_TEXTURE_CUBE_MAP_ARRAY_ARB, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 180         glTexParameteri(GL_TEXTURE_CUBE_MAP_ARRAY_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 181         glTexParameteri(GL_TEXTURE_CUBE_MAP_ARRAY_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 182         glTexParameteri(GL_TEXTURE_CUBE_MAP_ARRAY_ARB, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
 183         glBegin(GL_QUADS);
 184
 185         a_cube_face_texcoords[face][0][3] = layer;
 186         a_cube_face_texcoords[face][1][3] = layer;
 187         a_cube_face_texcoords[face][2][3] = layer;
 188         a_cube_face_texcoords[face][3][3] = layer;
 189
 190         glTexCoord4fv(a_cube_face_texcoords[face][0]);
 191         glVertex2f(x, y);
 192
 193         glTexCoord4fv(a_cube_face_texcoords[face][1]);
 194         glVertex2f(x + BUF_WIDTH, y);
 195
 196         glTexCoord4fv(a_cube_face_texcoords[face][2]);
 197         glVertex2f(x + BUF_WIDTH, y + BUF_HEIGHT);
 198
 199         glTexCoord4fv(a_cube_face_texcoords[face][3]);
 200         glVertex2f(x, y + BUF_HEIGHT);
 201
 202         glEnd();
 203
 204         glUseProgram(0);
 205 }
 206
 207 static GLboolean test_layer_drawing(int start_x, int start_y, float *expected)
 208 {
 209         return piglit_probe_rect_rgb(start_x, start_y, BUF_WIDTH, BUF_HEIGHT,
 210                                      expected);
 211 }
 212
 213 enum piglit_result
 214 piglit_display(void)
 215 {
 216         GLboolean pass = GL_TRUE;
 217         int layer;
 218         GLuint tex;
 219         int y;
 220
 221         glClearColor(1.0, 1.0, 1.0, 1.0);
 222         glClear(GL_COLOR_BUFFER_BIT);
 223
 224         tex = create_array_fbo();
 225
 226         y = -1;
 227         for (layer = 0; layer < num_layers; layer++) {
 228                 int x = 1 + (layer % 6) * (BUF_WIDTH + 1);
 229                 if (layer % 6 == 0)
 230                         y++;
 231                 draw_layer(x, y * BUF_HEIGHT, layer);
 232
 233         }
 234
 235         y = -1;
 236         for (layer = 0; layer < num_layers; layer++) {
 237                 int x = 1 + (layer % 6) * (BUF_WIDTH + 1);
 238                 if (layer % 6 == 0)
 239                         y++;
 240                 pass &= test_layer_drawing(x, y * BUF_HEIGHT, layer_color[layer]);
 241         }
 242
 243         glDeleteTextures(1, &tex);
 244
 245         piglit_present_results();
 246
 247         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 248 }
 249
 250 void piglit_init(int argc, char **argv)
 251 {
 252         piglit_require_extension("GL_ARB_texture_cube_map_array");
 253
 254         program_cube_array =
 255                 piglit_build_simple_program(NULL, frag_shader_cube_array_text);
 256
 257         setup_texcoords();
 258 }