/*
 * Copyright © 2010, 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.
 *
 *
 * Authors:
 *  *    Jian Zhao <jian.j.zhao@intel.com>
 *   *
 *
 */

/**
 * \file attribute0-fixed-function-vertex.c
 * Verify that applications can use attribute 0 with fixed function in vertex.
 */

#include "piglit-util.h"

int piglit_width = 100, piglit_height = 100;
int piglit_window_mode = GLUT_RGBA | GLUT_DOUBLE;

static const char fs_text[] =
	"void main() { gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0); }\n"
	;

static GLuint prog;

static const float green[] = { 0.0, 1.0, 0.0, 1.0 };
static const float blue[] = { 0.0, 0.0, 1.0, 1.0 };
static const float vertex[] = {0.5, 0.5, 0.0, 1, 0.5, -1.0, 0.0, 1, -1.0, 0.5, 0.0, 1};

enum piglit_result
piglit_display(void)
{
	GLboolean pass = GL_TRUE;

	glClear(GL_COLOR_BUFFER_BIT);

	glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, &vertex[0]);
	glEnableVertexAttribArray(0);
	glDrawArrays(GL_TRIANGLES, 0, 3);

	pass &= piglit_probe_pixel_rgb(piglit_width / 4, piglit_height / 4,
				       blue);
	pass &= piglit_probe_pixel_rgb(piglit_width / 2, piglit_height / 2,
				       green);

	assert(!glGetError());

	glutSwapBuffers();

	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}

void
piglit_init(int argc, char **argv)
{
	GLuint fs;

	piglit_require_fragment_shader();

	fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_text);
	prog = piglit_link_simple_program(0, fs);

	piglit_LinkProgram(prog);
	piglit_link_check_status(prog);

	piglit_UseProgram(prog);

	glClearColor(blue[0], blue[1], blue[2], blue[3]);
}