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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 pbo-readpixels-small.c
*
* Tests that reading 2x2 BGRA UNSIGNED_BYTE buffers work correctly.
*
* This is the corresponding test to fbo-pbo-readpixels-small test to
* make sure I didn't break any of the coordinate flipping (sure
* enough, I did).
*
* https://bugs.freedesktop.org/show_bug.cgi?id=25921
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
2 /*window_width*/,
2 /*window_height*/,
GLUT_RGB | GLUT_DOUBLE)
static GLboolean
probe(int x, int y, uint32_t expected, uint32_t observed)
{
if ((expected & 0xffffff) != (observed & 0xffffff)) {
printf("Probe at (%i,%i)\n", x, y);
printf(" Expected: 0x%08x\n", expected);
printf(" Observed: 0x%08x\n", observed);
return GL_FALSE;
} else {
return GL_TRUE;
}
}
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
uint32_t *addr;
GLuint pbo;
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glGenBuffersARB(1, &pbo);
glBindBufferARB(GL_PIXEL_PACK_BUFFER, pbo);
glBufferDataARB(GL_PIXEL_PACK_BUFFER, 4 * 4, NULL, GL_STREAM_DRAW_ARB);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glViewport(0, 0, 2, 2);
piglit_ortho_projection(2, 2, GL_FALSE);
/* bottom: green. top: blue. */
glColor4f(0.0, 1.0, 0.0, 0.0);
piglit_draw_rect(0, 0, 2, 1);
glColor4f(0.0, 0.0, 1.0, 0.0);
piglit_draw_rect(0, 1, 2, 1);
/* Read the whole buffer. */
glReadPixels(0, 0, 2, 2,
GL_BGRA, GL_UNSIGNED_BYTE, (void *)(uintptr_t)0);
addr = glMapBufferARB(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY_ARB);
pass &= probe(0, 0, 0x0000ff00, addr[0]);
pass &= probe(1, 0, 0x0000ff00, addr[1]);
pass &= probe(0, 1, 0x000000ff, addr[2]);
pass &= probe(1, 1, 0x000000ff, addr[3]);
glUnmapBufferARB(GL_PIXEL_PACK_BUFFER);
/* Read with an offset. */
glReadPixels(1, 0, 1, 1,
GL_BGRA, GL_UNSIGNED_BYTE, (void *)(uintptr_t)4);
addr = glMapBufferARB(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY_ARB);
pass &= probe(1, 0, 0x0000ff00, addr[1]);
glUnmapBufferARB(GL_PIXEL_PACK_BUFFER);
/* Read with an offset. */
glReadPixels(1, 1, 1, 1,
GL_BGRA, GL_UNSIGNED_BYTE, (void *)(uintptr_t)4);
addr = glMapBufferARB(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY_ARB);
pass &= probe(1, 1, 0x000000ff, addr[1]);
glUnmapBufferARB(GL_PIXEL_PACK_BUFFER);
glutSwapBuffers();
glDeleteBuffersARB(1, &pbo);
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
static void reshape(int width, int height)
{
piglit_width = width;
piglit_height = height;
piglit_ortho_projection(width, height, GL_FALSE);
}
void
piglit_init(int argc, char **argv)
{
reshape(piglit_width, piglit_height);
piglit_require_extension("GL_ARB_pixel_buffer_object");
}
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