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/*
* Copyright © 2009 Intel Corporation
* Copyright © 2010 Red Hat, Inc.
*
* 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 fp-formats.c
* Test fragment programs sampling from different texture formats.
* (currently just alpha-only textures)
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
100 /*window_width*/,
100 /*window_height*/,
PIGLIT_GL_VISUAL_DOUBLE)
/**
* Modulate the primary color with the alpha channel of the texture
*/
static const char alpha_source[] =
"!!ARBfp1.0\n"
"TEMP texel0;\n"
"TEX texel0,fragment.texcoord[0],texture[0],2D;\n"
"MOV result.color, texel0.abgr;\n"
"END"
;
static GLint progs[1];
static GLuint textures[1];
enum piglit_result
piglit_display(void)
{
enum piglit_result result = PIGLIT_PASS;
const GLfloat expected[4] = { 0.5, 0.0, 0.0, 0.0 };
glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, progs[0]);
glClear(GL_COLOR_BUFFER_BIT);
glEnable(GL_FRAGMENT_PROGRAM_ARB);
piglit_draw_rect(0, 0, piglit_width, piglit_height);
if (!piglit_probe_pixel_rgb(piglit_width / 2,
piglit_height / 2,
expected))
result = PIGLIT_FAIL;
piglit_present_results();
return result;
}
void
piglit_init(int argc, char **argv)
{
const GLfloat alpha_data[] = { 0.5 };
(void) argc;
(void) argv;
piglit_require_fragment_program();
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
progs[0] = piglit_compile_program(GL_FRAGMENT_PROGRAM_ARB,
alpha_source);
glGenTextures(1, textures);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, textures[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 1, 1, 0, GL_ALPHA, GL_FLOAT, alpha_data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glClearColor(1.0, 1.0, 1.0, 1.0);
}
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