tests/spec/arb_sampler_objects/srgb-decode.c

   1 /*
   2  * Copyright © 2012 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
  24 /**
  25  * @file srgb-decode.c
  26  *
  27  * Tests interaction between GL_ARB_sampler_objects and
  28  * GL_EXT_texture_sRGB_decode.
  29  *
  30  * From the GL_EXT_texture_sRGB_decode spec:
  31  *
  32  *     "4) Should we add forward-looking support for
  33  *         ARB_sampler_objects?
  34  *
  35  *         RESOLVED: YES
  36  *
  37  *         If ARB_sampler_objects exists in the implementation, the
  38  *         sampler objects should also include this parameter per
  39  *         sampler."
  40  */
  41
  42 #include "piglit-util-gl.h"
  43
  44 PIGLIT_GL_TEST_CONFIG_BEGIN
  45
  46         config.supports_gl_compat_version = 10;
  47
  48         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  49
  50 PIGLIT_GL_TEST_CONFIG_END
  51
  52 static bool
  53 test_getter(GLuint sampler)
  54 {
  55         bool pass = true;
  56         GLint i;
  57
  58         glGetSamplerParameteriv(sampler, GL_TEXTURE_SRGB_DECODE_EXT, &i);
  59         if (i != GL_DECODE_EXT) {
  60                 fprintf(stderr, "Default sampler decode was %s, expected %s\n",
  61                         piglit_get_gl_enum_name(i), "GL_DECODE_EXT");
  62                 pass = false;
  63         }
  64         glSamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT,
  65                             GL_SKIP_DECODE_EXT);
  66         glGetSamplerParameteriv(sampler, GL_TEXTURE_SRGB_DECODE_EXT, &i);
  67         if (i != GL_SKIP_DECODE_EXT) {
  68                 fprintf(stderr, "Updated sampler decode was %s, expected %s\n",
  69                         piglit_get_gl_enum_name(i), "GL_SKIP_DECODE_EXT");
  70                 pass = false;
  71         }
  72
  73         glSamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT, GL_DECODE_EXT);
  74
  75         return pass;
  76 }
  77
  78 static bool
  79 draw_and_test(int x, int y, const float *expected)
  80 {
  81         piglit_draw_rect_tex(x, y, piglit_width / 2, piglit_height / 2,
  82                              0, 0, 1, 1);
  83         return piglit_probe_rect_rgba(x, y, piglit_width / 2, piglit_height / 2,
  84                                       expected);
  85 }
  86
  87 enum piglit_result
  88 piglit_display(void)
  89 {
  90         bool pass = true;
  91         GLuint tex, sampler, sampler2;
  92         const float tex_data[4] = {0.2, 0.4, 0.6, 0.8};
  93         float decoded_tex_data[4];
  94         int i;
  95
  96         for (i = 0; i < 3; i++) {
  97                 decoded_tex_data[i] = piglit_srgb_to_linear(tex_data[i]);
  98         }
  99         decoded_tex_data[3] = tex_data[3];
 100
 101         glClear(GL_COLOR_BUFFER_BIT);
 102
 103         glGenTextures(1, &tex);
 104         glBindTexture(GL_TEXTURE_2D, tex);
 105         glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8_ALPHA8, 1, 1, 0,
 106                      GL_RGBA, GL_FLOAT, tex_data);
 107
 108         glGenSamplers(1, &sampler);
 109
 110         pass = test_getter(sampler) && pass;
 111
 112         /* First, test statechanging the value of the flag between the
 113          * bottom left and bottom right corners.
 114          */
 115         glEnable(GL_TEXTURE_2D);
 116         glBindSampler(0, sampler);
 117         pass = draw_and_test(0, 0, decoded_tex_data) && pass;
 118
 119         glSamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT,
 120                             GL_SKIP_DECODE_EXT);
 121         pass = draw_and_test(piglit_width / 2, 0, tex_data) && pass;
 122
 123         /* Now, test statechanging the samplers themselves between top left
 124          * and top right.
 125          */
 126         glGenSamplers(1, &sampler2);
 127         glBindSampler(0, sampler2);
 128         pass = draw_and_test(0, piglit_height / 2, decoded_tex_data) && pass;
 129
 130         glBindSampler(0, sampler);
 131         pass = draw_and_test(piglit_width / 2, piglit_height / 2,
 132                              tex_data) && pass;
 133
 134         piglit_present_results();
 135
 136         glDeleteSamplers(1, &sampler);
 137         glDeleteSamplers(1, &sampler2);
 138         glDeleteTextures(1, &tex);
 139
 140         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 141 }
 142
 143
 144 void
 145 piglit_init(int argc, char **argv)
 146 {
 147         piglit_require_extension("GL_ARB_sampler_objects");
 148         piglit_require_extension("GL_EXT_texture_sRGB");
 149         piglit_require_extension("GL_EXT_texture_sRGB_decode");
 150
 151         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 152 }