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/*
* Copyright © 2011 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.
*/
/**
* @file roundmode-pixelstore.c
*
* Tests that the floating point rounding mode doesn't impact
* glPixelStore's rounding behavior.
*
* From the GL 2.1 specification, page 114 (page 128 of the PDF):
*
* "The version of PixelStore that takes a floating-point value
* may be used to set any type of parameter; if the parameter is
* boolean, then it is set to FALSE if the passed value is 0.0
* and TRUE otherwise, while if the parameter is an integer, then
* the passed value is rounded to the nearest integer."
*/
#include "piglit-util-gl-common.h"
#include <fenv.h>
PIGLIT_GL_TEST_CONFIG_BEGIN
config.window_width = 10;
config.window_height = 10;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
enum piglit_result
piglit_display(void)
{
/* UNREACHED */
return PIGLIT_FAIL;
}
static bool
test(float val, int expect)
{
GLint out;
glPixelStoref(GL_UNPACK_ROW_LENGTH, val);
glGetIntegerv(GL_UNPACK_ROW_LENGTH, &out);
if (out != expect) {
printf("Set row length to %.1f, expected %d, got %d\n",
val, expect, out);
return false;
} else {
printf("Set row length to %.1f and got %d\n", val, out);
}
return true;
}
void
piglit_init(int argc, char **argv)
{
int ret;
bool pass = true;
ret = fesetround(FE_UPWARD);
if (ret != 0) {
printf("Couldn't set rounding mode\n");
piglit_report_result(PIGLIT_SKIP);
}
pass = test(2.2, 2) && pass;
pass = test(2.8, 3) && pass;
pass = test(-0.1, 0) && pass;
pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
printf("Setting row length -0.9, and expecting error\n");
glPixelStoref(GL_UNPACK_ROW_LENGTH, -0.9);
pass = piglit_check_gl_error(GL_INVALID_VALUE) && pass;
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
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