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/*
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/**
* @file srgb-decode.c
*
* Tests interaction between GL_ARB_sampler_objects and
* GL_EXT_texture_sRGB_decode.
*
* From the GL_EXT_texture_sRGB_decode spec:
*
* "4) Should we add forward-looking support for
* ARB_sampler_objects?
*
* RESOLVED: YES
*
* If ARB_sampler_objects exists in the implementation, the
* sampler objects should also include this parameter per
* sampler."
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 10;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
PIGLIT_GL_TEST_CONFIG_END
static bool
test_getter(GLuint sampler)
{
bool pass = true;
GLint i;
glGetSamplerParameteriv(sampler, GL_TEXTURE_SRGB_DECODE_EXT, &i);
if (i != GL_DECODE_EXT) {
fprintf(stderr, "Default sampler decode was %s, expected %s\n",
piglit_get_gl_enum_name(i), "GL_DECODE_EXT");
pass = false;
}
glSamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT,
GL_SKIP_DECODE_EXT);
glGetSamplerParameteriv(sampler, GL_TEXTURE_SRGB_DECODE_EXT, &i);
if (i != GL_SKIP_DECODE_EXT) {
fprintf(stderr, "Updated sampler decode was %s, expected %s\n",
piglit_get_gl_enum_name(i), "GL_SKIP_DECODE_EXT");
pass = false;
}
glSamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT, GL_DECODE_EXT);
return pass;
}
static bool
draw_and_test(int x, int y, const float *expected)
{
piglit_draw_rect_tex(x, y, piglit_width / 2, piglit_height / 2,
0, 0, 1, 1);
return piglit_probe_rect_rgba(x, y, piglit_width / 2, piglit_height / 2,
expected);
}
enum piglit_result
piglit_display(void)
{
bool pass = true;
GLuint tex, sampler, sampler2;
const float tex_data[4] = {0.2, 0.4, 0.6, 0.8};
float decoded_tex_data[4];
int i;
for (i = 0; i < 3; i++) {
decoded_tex_data[i] = piglit_srgb_to_linear(tex_data[i]);
}
decoded_tex_data[3] = tex_data[3];
glClear(GL_COLOR_BUFFER_BIT);
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8_ALPHA8, 1, 1, 0,
GL_RGBA, GL_FLOAT, tex_data);
glGenSamplers(1, &sampler);
pass = test_getter(sampler) && pass;
/* First, test statechanging the value of the flag between the
* bottom left and bottom right corners.
*/
glEnable(GL_TEXTURE_2D);
glBindSampler(0, sampler);
pass = draw_and_test(0, 0, decoded_tex_data) && pass;
glSamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT,
GL_SKIP_DECODE_EXT);
pass = draw_and_test(piglit_width / 2, 0, tex_data) && pass;
/* Now, test statechanging the samplers themselves between top left
* and top right.
*/
glGenSamplers(1, &sampler2);
glBindSampler(0, sampler2);
pass = draw_and_test(0, piglit_height / 2, decoded_tex_data) && pass;
glBindSampler(0, sampler);
pass = draw_and_test(piglit_width / 2, piglit_height / 2,
tex_data) && pass;
piglit_present_results();
glDeleteSamplers(1, &sampler);
glDeleteSamplers(1, &sampler2);
glDeleteTextures(1, &tex);
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_ARB_sampler_objects");
piglit_require_extension("GL_EXT_texture_sRGB");
piglit_require_extension("GL_EXT_texture_sRGB_decode");
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
}
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