tests/fbo/fbo-generatemipmap-1d.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   3  * Copyright © 2011 Red Hat Inc.
   4  * Copyright © 2014 Advanced Micro Devices, 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  *     Marek Olšák <maraeo@gmail.com>
  28  *
  29  */
  30
  31 #include "piglit-util-gl.h"
  32
  33 #define TEX_SIZE 128
  34 #define TEX_LEVELS 8
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 20;
  39
  40         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
  41         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  42
  43 PIGLIT_GL_TEST_CONFIG_END
  44
  45 static const char *fs_1d =
  46    "uniform sampler1D tex; \n"
  47    "void main() \n"
  48    "{ \n"
  49    "   gl_FragColor = texture1D(tex, gl_TexCoord[0].x); \n"
  50    "} \n";
  51
  52 static GLuint prog;
  53
  54 static float colors[4][4] = {
  55         {1.0, 0.0, 0.0, 1.0},
  56         {0.0, 1.0, 0.0, 1.0},
  57         {0.0, 0.0, 1.0, 1.0},
  58         {1.0, 0.0, 1.0, 1.0},
  59 };
  60
  61 static GLenum format;
  62
  63 static void
  64 load_texture_1d(void)
  65 {
  66         float p[TEX_SIZE * 4];
  67         int x;
  68
  69         for (x = 0; x < TEX_SIZE; x++) {
  70                 int c = x / (TEX_SIZE/4);
  71                 memcpy(&p[x*4], colors[c], sizeof(float) * 4);
  72         }
  73
  74         glTexSubImage1D(GL_TEXTURE_1D, 0, 0, TEX_SIZE, GL_RGBA, GL_FLOAT, p);
  75 }
  76
  77 static GLuint
  78 create_texture_1d(void)
  79 {
  80         GLuint tex, fb;
  81         GLenum status;
  82         int i, dim;
  83
  84         glGenTextures(1, &tex);
  85         glBindTexture(GL_TEXTURE_1D, tex);
  86         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
  87         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  88
  89         for (i = 0, dim = TEX_SIZE; dim >0; i++, dim /= 2) {
  90                 glTexImage1D(GL_TEXTURE_1D, i, format, dim, 0,
  91                              GL_RGBA, GL_UNSIGNED_BYTE, NULL);
  92         }
  93
  94         glGenFramebuffers(1, &fb);
  95         glBindFramebuffer(GL_FRAMEBUFFER, fb);
  96
  97         glFramebufferTexture1D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
  98                                GL_TEXTURE_1D, tex, 0);
  99
 100         status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
 101         if (status != GL_FRAMEBUFFER_COMPLETE) {
 102                 load_texture_1d();
 103                 goto done;
 104         }
 105
 106         glViewport(0, 0, TEX_SIZE, 1);
 107         piglit_ortho_projection(TEX_SIZE, 1, GL_FALSE);
 108
 109         glColor4fv(colors[0]);
 110         piglit_draw_rect(0, 0, TEX_SIZE / 4, 1);
 111         glColor4fv(colors[1]);
 112         piglit_draw_rect(TEX_SIZE / 4, 0, TEX_SIZE / 4, 1);
 113         glColor4fv(colors[2]);
 114         piglit_draw_rect(TEX_SIZE / 2, 0, TEX_SIZE / 4, 1);
 115         glColor4fv(colors[3]);
 116         piglit_draw_rect(TEX_SIZE/4 * 3, 0, TEX_SIZE / 4, 1);
 117
 118 done:
 119         glDeleteFramebuffers(1, &fb);
 120         glGenerateMipmap(GL_TEXTURE_1D);
 121         return tex;
 122 }
 123
 124 static void
 125 draw_level(int x, int y, int level)
 126 {
 127         int loc;
 128
 129         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_LOD, level);
 130         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAX_LOD, level);
 131
 132         glUseProgram(prog);
 133         loc = glGetUniformLocation(prog, "tex");
 134         glUniform1i(loc, 0); /* texture unit p */
 135
 136         glViewport(0, 0, piglit_width, piglit_height);
 137         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 138
 139         glBindFramebuffer(GL_FRAMEBUFFER, piglit_winsys_fbo);
 140
 141         piglit_draw_rect_tex(x, y, TEX_SIZE, 5, 0, 0, 1, 1);
 142         glUseProgram(0);
 143 }
 144
 145 static bool
 146 test_level(int level)
 147 {
 148         int size = TEX_SIZE >> level;
 149         int x,i,c;
 150         float e[TEX_SIZE * 4], observed[TEX_SIZE * 4];
 151
 152         glGetTexImage(GL_TEXTURE_1D, level, GL_RGBA, GL_FLOAT, observed);
 153
 154         if (size == 1) {
 155                 memset(e, 0, 4 * sizeof(float));
 156
 157                 /* Average the colors for the last level. */
 158                 for (i = 0; i < 4; i++)
 159                         for (c = 0; c < 4; c++)
 160                                 e[c] += colors[i][c] * 0.25;
 161         }
 162         else if (size == 2) {
 163                 memset(e, 0, 8 * sizeof(float));
 164
 165                 for (i = 0; i < 2; i++)
 166                         for (c = 0; c < 4; c++)
 167                                 e[c] += colors[i][c] * 0.5;
 168                 for (i = 2; i < 4; i++)
 169                         for (c = 0; c < 4; c++)
 170                                 e[4+c] += colors[i][c] * 0.5;
 171         }
 172         else {
 173                 for (x = 0; x < size; x++) {
 174                         int col = x / (size/4);
 175                         memcpy(&e[x*4], colors[col], sizeof(float) * 4);
 176                 }
 177         }
 178
 179         for (x = 0; x < size; x++) {
 180                 float *probe = &observed[x*4];
 181                 float *expected = &e[x*4];
 182
 183                 for (i = 0; i < 4; ++i) {
 184                         if (fabs(probe[i] - expected[i]) >= piglit_tolerance[i]) {
 185                                 printf("Probe color at (%i)\n", x);
 186                                 printf("  Expected: %f %f %f %f\n",
 187                                        expected[0], expected[1], expected[2], expected[3]);
 188                                 printf("  Observed: %f %f %f %f\n",
 189                                        probe[0], probe[1], probe[2], probe[3]);
 190                                 printf("  when testing level %i\n", level);
 191                                 return false;
 192                         }
 193                 }
 194         }
 195         return true;
 196 }
 197
 198 enum piglit_result
 199 piglit_display(void)
 200 {
 201         GLboolean pass = GL_TRUE;
 202         GLuint tex1d;
 203         int level;
 204
 205         glClearColor(0.1, 0.1, 0.1, 0.1);
 206         glClear(GL_COLOR_BUFFER_BIT);
 207
 208         tex1d = create_texture_1d();
 209
 210         for (level = 0; level < TEX_LEVELS; level++) {
 211                 draw_level(5, 5 + level * 10, level);
 212                 pass = pass && test_level(level);
 213         }
 214
 215         glDeleteTextures(1, &tex1d);
 216         piglit_present_results();
 217         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 218 }
 219
 220 void piglit_init(int argc, char **argv)
 221 {
 222         int i;
 223
 224         piglit_require_extension("GL_EXT_framebuffer_object");
 225
 226         format = GL_RGBA8;
 227
 228         for (i = 1; i < argc; i++) {
 229                 if (strcmp(argv[i], "RGB9_E5") == 0) {
 230                         /* Test a non-renderable format. */
 231                         piglit_require_extension("GL_EXT_texture_shared_exponent");
 232                         format = GL_RGB9_E5;
 233                 }
 234                 else {
 235                         assert(0);
 236                 }
 237         }
 238
 239         prog = piglit_build_simple_program(NULL, fs_1d);
 240 }