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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-novertexdata.c
*
* Test if we can draw something without specifying/enabling any vertex
* arrays. The vertex shader simply sets gl_Position=(0,0,0,1) and we
* try to draw a GL_POINT.
*
* This is an obscure case, but it works with NVIDIA's OpenGL driver,
* works with Mesa/swrast, but Mesa/gallium fails (at the time of
* writing this).
*
* 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-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 10;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
static const GLchar *vertShaderText =
"attribute vec4 attrib;\n"
"void main()\n"
"{\n"
" gl_Position = vec4(0.0, 0.0, 0.0, 1.0);\n"
" gl_FrontColor = vec4(0.0, 1.0, 0.0, 1.0);\n"
"} \n";
enum piglit_result
piglit_display(void)
{
static const GLfloat expColor[4] = {0, 1, 0, 1};
GLint vs;
GLint prog;
GLint stat;
enum piglit_result result;
vs = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vs, 1, &vertShaderText, NULL);
glCompileShader(vs);
glGetShaderiv(vs, GL_COMPILE_STATUS, &stat);
if (!stat) {
printf("glsl-novertexdata: error compiling vertex shader!\n");
exit(1);
}
prog = glCreateProgram();
glAttachShader(prog, vs);
glLinkProgram(prog);
glUseProgram(prog);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glPointSize(20.0);
glDrawArrays(GL_POINTS, 0, 1);
result = piglit_probe_pixel_rgba(piglit_width /2, piglit_height / 2,
expColor)
? PIGLIT_PASS : PIGLIT_FAIL;
piglit_present_results();
return result;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_gl_version(20);
}
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