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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:
* Ben Holmes <shranzel@hotmail.com>
*/
/* This test draws to the screen using glDrawPixels with data formats of GL_RED
* and GL_RG and tests for the correct color output.
*/
#include "piglit-util.h"
#include "piglit-framework.h"
int piglit_width = 40, piglit_height = 30;
int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
void
piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_ARB_texture_rg");
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glEnable(GL_TEXTURE_2D);
glClearColor(0.2, 0.2, 0.2, 1.0);
}
enum piglit_result
piglit_display(void)
{
static const GLfloat red[3] = {1.0, 0.0, 0.0};
static const GLfloat rg[3] = {1.0, 1.0, 0.0};
static const GLfloat black[3] = {0.0, 0.0, 0.0};
#define height 16
#define width 16
int i, j;
GLfloat texData[width][height][4];
GLboolean pass = GL_TRUE;
glClear(GL_COLOR_BUFFER_BIT);
for (i=0; i < width; ++i) {
for (j=0; j < height; ++j) {
if ((i+j) & 1) {
texData[i][j][0] = 1.0;
texData[i][j][1] = 1.0;
texData[i][j][2] = 1.0;
texData[i][j][3] = 1.0;
}
else {
texData[i][j][0] = 0.0;
texData[i][j][1] = 0.0;
texData[i][j][2] = 0.0;
texData[i][j][3] = 0.0;
}
}
}
/* The image consists of alternating patterns of 4 0.0 values followed
* by 4 1.0 values. When drawn as GL_RED, this results in 4x4 pixel
* blocks of black and red. When drawn as GL_RG, this results in 2x2
* pixel blocks of gold (full green and full red).
*/
glRasterPos2i(0,0);
glDrawPixels(width,height,GL_RED,GL_FLOAT,texData);
glRasterPos2i(18,0);
glDrawPixels(width,height,GL_RG,GL_FLOAT,texData);
pass = pass && piglit_probe_pixel_rgb(0,0,black);
pass = pass && piglit_probe_pixel_rgb(2,0,black);
pass = pass && piglit_probe_pixel_rgb(4,0,red);
pass = pass && piglit_probe_pixel_rgb(6,0,red);
pass = pass && piglit_probe_pixel_rgb(18,0,black);
pass = pass && piglit_probe_pixel_rgb(19,0,black);
pass = pass && piglit_probe_pixel_rgb(20,0,rg);
pass = pass && piglit_probe_pixel_rgb(21,0,rg);
glutSwapBuffers();
return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
#undef height
#undef width
}
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