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/*
* Copyright © 2009 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-fragcoord.c
*
* Tests that gl_FragCoord produces the expected output in a fragment shader.
*/
#include "piglit-util.h"
int piglit_width = 256, piglit_height = 256;
int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
static GLint prog;
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
int x, y;
glClearColor(0.5, 0.5, 0.5, 0.5);
glClear(GL_COLOR_BUFFER_BIT);
piglit_draw_rect(0, 0, piglit_width, piglit_height);
for (y = 8; y < piglit_height && pass; y += 16) {
for (x = 8; x < piglit_width; x += 16) {
float color[3];
color[0] = x / 256.0;
color[1] = y / 256.0;
color[2] = 0;
pass &= piglit_probe_pixel_rgb(x, y, color);
if (!pass)
break;
}
}
glutSwapBuffers();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
GLint vs, fs;
if (piglit_get_gl_version() < 20) {
printf("Requires OpenGL 2.0\n");
piglit_report_result(PIGLIT_SKIP);
}
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-fragcoord.frag");
prog = piglit_link_simple_program(vs, fs);
glUseProgram(prog);
}
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