/*
 * Copyright © 2009 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:
 *    Sun Yi <yi.sun@intel.com>
 *
 */

/** @file glsl-getactiveattrib-count.c
 *
 * To test the number of active attributes in a program can be retrieved with glGetProgramiv with GL_ACTIVE_ATTRIBUTES.
 *
 */

#include "piglit-util.h"

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

static GLint prog;

static const char vs_source[] =
        "attribute  float  myAttribVar; \n"
        "attribute  float  maxAttribVal; \n"
        "void main() \n"
        "{ \n"
//        "    gl_Position = ftransform(); \n"
        "    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; \n"
        "    gl_FrontColor.x = myAttribVar / maxAttribVal; \n"                   "    gl_FrontColor.y = 0.0; \n"
        "    gl_FrontColor.z = 0.0; \n"
        "    gl_FrontColor.w = 1.0; \n"
        "} \n";

static const char fs_source[] =
        "void main() \n"
        "{ \n"
        "    gl_FragColor[0] = gl_Color.x; \n"
        "    gl_FragColor[1] = gl_Color.y; \n"
        "    gl_FragColor[2] = gl_Color.z; \n"
        "    gl_FragColor[3] = gl_Color.w; \n"
        "} \n";

enum piglit_result
piglit_display(void)
{
	/* unreached */
	return PIGLIT_FAIL;
}

void
piglit_init(int argc, char **argv)
{

	GLint vs, fs;
	GLboolean pass = GL_TRUE;

	int count = 0, expect = 3;

	if (!GLEW_VERSION_2_0) {
        printf("Requires OpenGL 2.0\n");
        piglit_report_result(PIGLIT_SKIP);
    }
//    piglit_require_extension("GL_EXT_separate_shader_objects");

    vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_source);
    fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_source);
    prog = piglit_link_simple_program(vs, fs);

	glGetProgramiv(prog, GL_ACTIVE_ATTRIBUTES, &count);

	if (count != expect) {
		printf("Unexpected active attribute count "
		       "(saw %d, expected %d)\n", count, expect);
		pass = GL_FALSE;
	}

	if (pass)
		piglit_report_result(PIGLIT_PASS);
	else
		piglit_report_result(PIGLIT_FAIL);
}