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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 mixing-clip-distance-and-clip-vertex-disallowed.c
*
* From the GLSL 1.30 spec, section 7.1 (Vertex Shader Special
* Variables):
*
* It is an error for a shader to statically write both
* gl_ClipVertex and gl_ClipDistance.
*
* This test verifies that an error is generated if the shader
* contains writes to both variables, even if those writes would never
* both occur in the same render.
*/
#include "piglit-util.h"
PIGLIT_GL_TEST_MAIN(
100 /*window_width*/,
100 /*window_height*/,
GLUT_RGB | GLUT_DOUBLE)
static const char vert[] =
"#version 130\n"
"uniform bool use_ClipDistance;\n"
"void main()\n"
"{\n"
" gl_Position = vec4(0.0);\n"
" if (use_ClipDistance) {\n"
" gl_ClipDistance[0] = 1.0;\n"
" } else {\n"
" gl_ClipVertex = vec4(0.0);\n"
" }\n"
"}\n";
static const char frag[] =
"#version 130\n"
"void main()\n"
"{\n"
" gl_FragColor = gl_Color;\n"
"}\n";
enum piglit_result
piglit_display(void)
{
return PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
const char *glsl_version_string;
float glsl_version;
GLint ok;
GLuint prog;
GLuint vs;
GLuint fs;
piglit_require_GLSL();
glsl_version_string = (char *)
glGetString(GL_SHADING_LANGUAGE_VERSION);
glsl_version = (glsl_version_string == NULL)
? 0.0 : strtod(glsl_version_string, NULL);
if (glsl_version <= 1.299999) {
printf("Test requires GLSL version >= 1.3. "
"Actual version is %.1f.\n",
glsl_version);
piglit_report_result(PIGLIT_SKIP);
}
vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vert);
fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, frag);
prog = glCreateProgram();
glAttachShader(prog, vs);
glAttachShader(prog, fs);
glLinkProgram(prog);
glDeleteShader(vs);
glDeleteShader(fs);
ok = piglit_link_check_status_quiet(prog);
if (ok) {
fprintf(stderr,
"Linking with a shader that accesses both "
"gl_ClipDistance and gl_ClipVertex succeeded when it "
"should have failed.\n");
piglit_report_result(PIGLIT_FAIL);
}
piglit_report_result(PIGLIT_PASS);
}
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