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/*
* Copyright © 2009 Intel Corporation
* Copyright © 2010 VMware, Inc.
*
* 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-bindattriblocation.c
*
* Check glBindAttribLocation().
*
* We create a simple vertex shader with a single user-defined vertex
* attribute bound to location 3 (or anything non-zero). Then try to
* draw a polygon. Mesa has (had) a draw-time validation check which
* no-op'd the draw if vertex array #0 was not enabled.
*
* This test is based on the glsl-dlist-getattriblocation.c test written
* by Ian.
*
* \author Ian Romanick <ian.d.romanick@intel.com>
* \author Brian Paul
*/
#include "piglit-util.h"
#include "piglit-framework.h"
PIGLIT_GL_TEST_MAIN(
100 /*window_width*/,
100 /*window_height*/,
GLUT_RGB | GLUT_DOUBLE)
static const GLchar *vertShaderText =
"attribute vec4 attrib;\n"
"void main()\n"
"{\n"
" gl_Position = gl_ModelViewProjectionMatrix * attrib;\n"
" gl_FrontColor = vec4(0.0, 1.0, 0.0, 1.0);\n"
"} \n";
static const GLfloat Vcoords[4][2] = { {-1, -1}, {1, -1}, {1, 1}, {-1, 1}};
enum piglit_result
piglit_display(void)
{
static const GLfloat expColor[4] = {0, 1, 0, 1};
GLint vs;
GLint prog;
GLint orig_attrib_loc, attrib_loc;
enum piglit_result result;
vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vertShaderText);
if (vs == 0) {
exit(1);
}
prog = piglit_link_simple_program(vs, 0);
if (prog == 0) {
exit(1);
}
orig_attrib_loc = glGetAttribLocation(prog, "attrib");
if (!piglit_automatic)
printf("original attrib_loc = %d\n", orig_attrib_loc);
/* Bind "attrib" to location 3 and re-link */
glBindAttribLocation(prog, 3, "attrib");
piglit_LinkProgram(prog);
/* check that the bind worked */
attrib_loc = glGetAttribLocation(prog, "attrib");
if (!piglit_automatic)
printf("new attrib_loc = %d\n", attrib_loc);
if (attrib_loc != 3) {
fprintf(stderr, "glsl-bindattriblocation: glBindAttribLocation failed\n");
fprintf(stderr, " expectec location 3, found location %d\n",
attrib_loc);
return PIGLIT_FAIL;
}
/* now draw something and check that it works */
piglit_UseProgram(prog);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-1.1, 1.1, -1.1, 1.1, -1, 1);
glClear(GL_COLOR_BUFFER_BIT);
glVertexAttribPointer(attrib_loc, 2, GL_FLOAT, GL_FALSE, 0, Vcoords);
glEnableVertexAttribArray(attrib_loc);
glDrawArrays(GL_POLYGON, 0, 4);
result = piglit_probe_pixel_rgba(20, 20, expColor)
? PIGLIT_PASS : PIGLIT_FAIL;
glDisableVertexAttribArray(attrib_loc);
glutSwapBuffers();
return result;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_vertex_shader();
if (piglit_get_gl_version() < 20) {
printf("Requires OpenGL 2.0\n");
piglit_report_result(PIGLIT_SKIP);
exit(1);
}
}
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