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/*
* (C) Copyright IBM Corporation 2004
* All Rights Reserved.
*
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS 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 blendsquare.c
*
* Simple test of GL_NV_blend_square functionality. Four squares are drawn
* with different blending modes, but all should be rendered with the same
* final color.
*
* \author Ian Romanick <idr@us.ibm.com>
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
400 /*window_width*/,
200 /*window_height*/,
GLUT_RGB | GLUT_DOUBLE)
static const GLfloat Near = 5.0, Far = 25.0;
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
int w = (piglit_width - 50) / 4;
int h = piglit_height - 20;
int start_x = 10;
int next_x = 10 + w;
float expected[4] = {0.25, 0.25, 0.25, 0.25};
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glClearColor(0.2, 0.2, 0.8, 0);
glClear(GL_COLOR_BUFFER_BIT);
glBlendFunc(GL_ONE, GL_ZERO);
glColor3f(0.5 * 0.5, 0.5 * 0.5, 0.5 * 0.5);
piglit_draw_rect(start_x + next_x * 0, 10, w, h);
glBlendFunc(GL_ONE, GL_ZERO);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(start_x + next_x * 1, 10, w, h);
glBlendFunc(GL_DST_COLOR, GL_ZERO);
piglit_draw_rect(start_x + next_x * 1, 10, w, h);
glBlendFunc(GL_SRC_COLOR, GL_ZERO);
piglit_draw_rect(start_x + next_x * 2, 10, w, h);
glBlendFunc(GL_ONE, GL_ZERO);
piglit_draw_rect(start_x + next_x * 3, 10, w, h);
glBlendFunc(GL_ZERO, GL_DST_COLOR);
piglit_draw_rect(start_x + next_x * 3, 10, w, h);
pass = piglit_probe_pixel_rgb(15 + next_x * 0, piglit_height / 2,
expected) && pass;
pass = piglit_probe_pixel_rgb(15 + next_x * 1, piglit_height / 2,
expected) && pass;
pass = piglit_probe_pixel_rgb(15 + next_x * 2, piglit_height / 2,
expected) && pass;
pass = piglit_probe_pixel_rgb(15 + next_x * 3, piglit_height / 2,
expected) && pass;
glutSwapBuffers();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
if (piglit_get_gl_version() < 14 && !piglit_is_extension_supported("GL_NV_blend_square")) {
printf("Sorry, this program requires either OpenGL 1.4 or "
"GL_NV_blend_square\n");
piglit_report_result(PIGLIT_SKIP);
}
printf("\nAll 4 quads should be the same color. "
"The two on the left are drawn\n"
"without NV_blend_square functionality, and "
"the two on the right are drawn\n"
"with NV_blend_square functionality. If the "
"two on the left are dark, but\n"
"the two on the right are not, then "
"NV_blend_square is broken.\n");
glEnable(GL_BLEND);
}
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