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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 bindfragdata-link-error.c
*
* \author Ian Romanick
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
100 /*window_width*/,
100 /*window_height*/,
PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE)
static const char *vs_text =
"#version 130\n"
"in vec4 vertex;\n"
"void main() { gl_Position = vertex; }\n"
;
static const char *fs_text =
"#version 130\n"
"out vec4 v;\n"
"out vec4 a[2];\n"
"void main() {\n"
" v = vec4(0.0);\n"
" a[0] = vec4(1.0);\n"
" a[1] = vec4(2.0);\n"
"}\n"
;
enum piglit_result
piglit_display(void)
{
return PIGLIT_FAIL;
}
void piglit_init(int argc, char **argv)
{
GLint max_draw_buffers;
GLuint prog;
GLuint vs;
GLuint fs;
piglit_require_gl_version(30);
/* This test needs some number of draw buffers, so make sure the
* implementation isn't broken. This enables the test to generate a
* useful failure message.
*/
glGetIntegerv(GL_MAX_DRAW_BUFFERS, &max_draw_buffers);
if (max_draw_buffers < 8) {
fprintf(stderr,
"OpenGL 3.0 requires GL_MAX_DRAW_BUFFERS >= 8. "
"Only got %d!\n",
max_draw_buffers);
piglit_report_result(PIGLIT_FAIL);
}
prog = glCreateProgram();
vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_text);
fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_text);
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
/* First, verify that the program will link without making any
* location assignments through the API.
*/
printf("Basic test...\n");
glAttachShader(prog, vs);
glAttachShader(prog, fs);
glLinkProgram(prog);
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
if (!piglit_link_check_status(prog)) {
piglit_report_result(PIGLIT_FAIL);
}
/* Page 237 (page 253 of the PDF) of the OpenGL 3.0 spec says:
*
* "LinkProgram will fail if the assigned binding of a varying out
* variable would cause the GL to reference a non-existant
* fragment color number (one greater than or equal to MAX DRAW
* BUFFERS)."
*
* The array output has two elements. Binding it to
* GL_MAX_DRAW_BUFFERS - 1 causes a[0] to have a valid location but
* a[1] to have an invalid location.
*
* This should not generate a GL error. It should only cause linking
* to fail.
*/
printf("Assigning `a' to GL_MAX_DRAW_BUFFERS - 1...\n");
glBindFragDataLocation(prog, 0, "v");
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
glBindFragDataLocation(prog, max_draw_buffers - 1, "a");
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
glLinkProgram(prog);
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
if (piglit_link_check_status(prog)) {
fprintf(stderr,
"Linking was successful when it should have failed.\n");
piglit_report_result(PIGLIT_FAIL);
}
/* Page 237 (page 253 of the PDF) of the OpenGL 3.0 spec says:
*
* "LinkProgram will also fail if more than one varying out
* variable is bound to the same number. This type of aliasing is
* not allowed."
*
* Try this by assiging 'a[0]' and 'v' to the same slot, and also try
* assigning 'a[1]' and 'v' to the same slot.
*
* This should not generate a GL error. It should only cause linking
* to fail.
*/
printf("Assigning `a[0]' and `v' to the same slot...\n");
glBindFragDataLocation(prog, 0, "v");
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
glBindFragDataLocation(prog, 0, "a");
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
glLinkProgram(prog);
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
if (piglit_link_check_status(prog)) {
fprintf(stderr,
"Linking was successful when it should have failed.\n");
piglit_report_result(PIGLIT_FAIL);
}
printf("Assigning `a[1]' to `v' to the same slot...\n");
glBindFragDataLocation(prog, 1, "v");
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
glBindFragDataLocation(prog, 0, "a");
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
glLinkProgram(prog);
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
if (piglit_link_check_status(prog)) {
fprintf(stderr,
"Linking was successful when it should have failed.\n");
piglit_report_result(PIGLIT_FAIL);
}
printf("Assigning `a' to `v' to non-overlapping slots...\n");
glBindFragDataLocation(prog, 0, "v");
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
glBindFragDataLocation(prog, 2, "a");
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
glLinkProgram(prog);
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
if (!piglit_link_check_status(prog)) {
fprintf(stderr,
"Linking failed when it should have been "
"successful.\n");
piglit_report_result(PIGLIT_FAIL);
}
piglit_report_result(PIGLIT_PASS);
}
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