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/*
* Copyright © 2010 Luca Barbieri
*
* 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 spec/arb_color_buffer_float/probepixel.c
*
* Tests that read color clamping affects 1x1 glReadPixels as specified by
* ARB_color_buffer_float
*
* This is a separate test from the 2x2 glReadPixels because some
* implementations (e.g. ATI's) are broken, since they presumably
* special-case it incorrectly.
*/
#include "common.h"
GLboolean test()
{
GLboolean pass = GL_TRUE;
for(read_clamp = 0; read_clamp < 3; ++read_clamp)
{
unsigned clamped = clamp_enums[read_clamp] == GL_TRUE || (clamp_enums[read_clamp] == GL_FIXED_ONLY_ARB && fixed);
unsigned x, y;
printf("probe_pixel of fbo for float texture with read clamp %s (expecting %sclamping)\n", clamp_strings[read_clamp], clamped ? "" : "no ");
glClampColorARB(GL_CLAMP_READ_COLOR_ARB, clamp_enums[read_clamp]);
expected = (fixed || clamped) ? clamped_pixels : pixels;
for(y = 0; y < 2; ++y)
for(x = 0; x < 2; ++x)
{
GLboolean cpass = piglit_probe_pixel_rgba(x, y, expected + 8 * y + 4 * x);
GLboolean opass = cpass;
if(!cpass && clamped && ati_driver)
{
printf("ATI driver known bug: 1x1 glReadPixels ignores the read clamp!\n");
opass = GL_TRUE;
}
if(!cpass && nvidia_driver && clamped)
{
printf("nVidia driver known *** MAJOR BUG ***: they ignore the read clamp!\n");
opass = GL_TRUE;
}
pass = opass && pass;
}
}
glClampColorARB(GL_CLAMP_READ_COLOR_ARB, GL_FALSE);
return pass;
}
unsigned
init()
{
return TEST_SRT;
}
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