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/*
* Copyright (c) 2014 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 glsl-vs-int-attrib.c
*
* Tests that we can set an integer vertex attribute to a value that
* looks like a signalling NaN if it were interpreted as a float. If
* an implementation passes this through a floating point variable it
* might incorrectly get corrupted to a quiet NaN.
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 20;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
/* This value looks like a signalling NaN if it were interpreted as a
* float */
#define TEST_VALUE 0x7f817f81
#define STR(x) #x
#define STRINGIFY(x) STR(x)
static const char
vertex_source[] =
"#version 130\n"
"\n"
"attribute vec4 piglit_vertex;\n"
"attribute uint a_value;\n"
"\n"
"void\n"
"main()\n"
"{\n"
" if (a_value == " STRINGIFY(TEST_VALUE) "u)\n"
" gl_FrontColor = vec4(0.0, 1.0, 0.0, 1.0);\n"
" else\n"
" gl_FrontColor = vec4(1.0, 0.0, 0.0, 1.0);\n"
" gl_Position = piglit_vertex;\n"
"}\n";
static const float green[] = { 0.0f, 1.0f, 0.0f };
static bool
run_test(void)
{
GLuint prog;
GLint attrib;
bool pass;
prog = piglit_build_simple_program(vertex_source,
NULL /* fs_source */);
glUseProgram(prog);
attrib = glGetAttribLocation(prog, "a_value");
glVertexAttribI1ui(attrib, TEST_VALUE);
piglit_draw_rect(-1, -1, 2, 2);
pass = piglit_probe_pixel_rgb(0, 0, green);
glUseProgram(0);
glDeleteProgram(prog);
return pass;
}
void
piglit_init(int argc, char **argv)
{
bool pass;
/* We need to be able to call glVertexAttribI1ui */
if (piglit_get_gl_version() < 30
&& !piglit_is_extension_supported("GL_EXT_gpu_shader4")) {
printf("OpenGL 3.0 or GL_EXT_gpu_shader4 is required.\n");
piglit_report_result(PIGLIT_SKIP);
}
piglit_require_GLSL_version(130);
pass = run_test();
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
enum piglit_result
piglit_display(void)
{
/* unused */
return PIGLIT_FAIL;
}
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