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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-pointcoord.c
*
* Tests that gl_PointCoord produces the expected output in a fragment shader
* with point sprites enabled.
*/
#if defined(_WIN32)
#include <windows.h>
#endif
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/stat.h>
#define GL_GLEXT_PROTOTYPES
#include "glew.h"
#if defined(__APPLE__)
#include <GLUT/glut.h>
#else
#include "GL/glut.h"
#endif
#include "piglit-util.h"
int piglit_width = 256;
int piglit_height = 256;
int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB;
static GLint prog;
static GLint point_size;
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
const float red[4] = {1, 0, 0, 0};
const float green[4] = {0, 1, 0, 0};
const float yellow[4] = {1, 1, 0, 0};
const float black[4] = {0, 0, 0, 0};
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glClearColor(0.5, 0.5, 0.5, 0.5);
glClear(GL_COLOR_BUFFER_BIT);
glPointSize(point_size);
glBegin(GL_POINTS);
glVertex2f(point_size / 2, point_size / 2);
glEnd();
pass = pass && piglit_probe_pixel_rgb(0, 0, green);
pass = pass && piglit_probe_pixel_rgb(point_size - 1, 0, yellow);
pass = pass && piglit_probe_pixel_rgb(0, point_size - 1, black);
pass = pass && piglit_probe_pixel_rgb(point_size - 1, point_size - 1, red);
glutSwapBuffers();
return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
}
void piglit_init(int argc, char**argv)
{
GLint vs, fs;
GLint point_size_limits[2];
if (!GLEW_VERSION_2_0) {
printf("Requires OpenGL 2.0\n");
piglit_report_result(PIGLIT_SKIP);
exit(1);
}
piglit_require_extension("GL_ARB_point_sprite");
glGetIntegerv(GL_ALIASED_POINT_SIZE_RANGE, point_size_limits);
point_size = point_size_limits[1];
if (point_size > piglit_width)
point_size = piglit_width;
if (point_size > piglit_height)
point_size = piglit_height;
vs = piglit_compile_shader(GL_VERTEX_SHADER,
"shaders/glsl-fs-pointcoord.vert");
fs = piglit_compile_shader(GL_FRAGMENT_SHADER,
"shaders/glsl-fs-pointcoord.frag");
prog = piglit_link_simple_program(vs, fs);
glEnable(GL_POINT_SPRITE);
glUseProgram(prog);
}
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