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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 fbo-flushing.c
*
* Tests that rendering to a texture then texturing from it gets correct
* results.
*
* This caught a bug where the texture cache wasn't flushed appropriately
* on the Intel drivers once additional batchbuffer flushing had been
* removed.
*/
#include "piglit-util-gl-common.h"
#define TEX_WIDTH 128
#define TEX_HEIGHT 128
PIGLIT_GL_TEST_MAIN(
300 /*window_width*/,
300 /*window_height*/,
PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE)
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
int y, size;
GLuint tex, fb;
const float red[] = {1, 0, 0, 0};
const float green[] = {0, 1, 0, 0};
glClearColor(0.5, 0.5, 0.5, 0.5);
glClear(GL_COLOR_BUFFER_BIT);
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
TEX_WIDTH, TEX_HEIGHT, 0,
GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glGenFramebuffersEXT(1, &fb);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D,
tex,
0);
assert(glGetError() == 0);
assert(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) ==
GL_FRAMEBUFFER_COMPLETE_EXT);
/* For each power of two size we test, draw red to it, draw it to
* the framebuffer, then draw green to it and draw it to the
* framebuffer.
*
* Hopefully between these we'll catch any flushing fail.
*/
y = 0;
for (size = TEX_WIDTH; size > 0; size /= 2) {
glDisable(GL_TEXTURE_2D);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
glColor4fv(red);
piglit_ortho_projection(TEX_WIDTH, TEX_HEIGHT, GL_FALSE);
piglit_draw_rect(0, y, size, size);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glEnable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
piglit_draw_rect_tex(0, y, size, size, 0, 0, 1, 1);
glDisable(GL_TEXTURE_2D);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
glColor4fv(green);
piglit_ortho_projection(TEX_WIDTH, TEX_HEIGHT, GL_FALSE);
piglit_draw_rect(0, y, size, size);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glEnable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
piglit_draw_rect_tex(0, y, size, size, 0, 0, 1, 1);
y += size + 5;
}
glDeleteFramebuffersEXT(1, &fb);
glDeleteTextures(1, &tex);
y = 0;
for (size = TEX_WIDTH; size > 0; size /= 2) {
pass = pass && piglit_probe_rect_rgb(0, y, size, size, green);
y += size + 5;
}
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_EXT_framebuffer_object");
}
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