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/*
* Copyright © 2010 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.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
/** @file glsl-fs-mix.c
*
* Tests that mix() produces the expected output in a fragment shader.
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
100 /*window_width*/,
100 /*window_height*/,
PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_ALPHA)
static int args1_location, args2_location, args3_location;
static GLint prog;
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
/* result = mix(args1, args2, args3) */
static const float args1[4] = {1.0, 0.0, 2.0, 0.0};
static const float args2[4] = {0.0, 1.0, 0.0, 2.0};
static const float args3[4] = {0.5, 0.5, 0.75, 0.25};
static const float gray[] = {0.5, 0.5, 0.5, 0.5};
glClearColor(0.0, 1.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glUniform4fv(args1_location, 1, args1);
glUniform4fv(args2_location, 1, args2);
glUniform4fv(args3_location, 1, args3);
piglit_draw_rect(10, 10, 10, 10);
pass &= piglit_probe_pixel_rgba(15, 15, gray);
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
GLint vs, fs;
piglit_require_gl_version(20);
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
vs = piglit_compile_shader(GL_VERTEX_SHADER,
"shaders/glsl-mvp.vert");
fs = piglit_compile_shader(GL_FRAGMENT_SHADER,
"shaders/glsl-fs-mix.frag");
prog = piglit_link_simple_program(vs, fs);
glUseProgram(prog);
args1_location = glGetUniformLocation(prog, "args1");
args2_location = glGetUniformLocation(prog, "args2");
args3_location = glGetUniformLocation(prog, "args3");
}
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