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/*
* Copyright © 2011 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 glsl-fs-fogcolor-statechange.c
*
* Tests that changing just gl_Fog.color is reflected in program
* execution.
*/
#include "piglit-util.h"
int piglit_width = 100, piglit_height = 100;
int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE | GLUT_ALPHA;
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
static const float green[] = {0.0, 1.0, 0.0, 0.0};
static const float blue[] = {0.0, 0.0, 1.0, 0.0};
glClearColor(1.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glFogfv(GL_FOG_COLOR, green);
piglit_draw_rect(-1, -1, 1, 2);
glFogfv(GL_FOG_COLOR, blue);
piglit_draw_rect(0, -1, 1, 2);
pass &= piglit_probe_rect_rgba(0, 0,
piglit_width / 2, piglit_height,
green);
pass &= piglit_probe_rect_rgba(piglit_width / 2, 0,
piglit_width / 2, piglit_height,
blue);
glutSwapBuffers();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
GLint vs, fs, prog;
const char *fs_source =
"void main()\n"
"{\n"
" gl_FragColor = gl_Fog.color;\n"
"}\n";
if (!GLEW_VERSION_2_0) {
printf("Requires OpenGL 2.0\n");
piglit_report_result(PIGLIT_SKIP);
}
vs = piglit_compile_shader(GL_VERTEX_SHADER,
"shaders/glsl-mvp.vert");
fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_source);
prog = piglit_link_simple_program(vs, fs);
glUseProgram(prog);
}
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