/*
 * Copyright © 2009 Intel Corporation
 * Copyright © 2010 Red Hat, 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.
 *
 * Authors:
 *    Shuang He <shuang.he@intel.com>
 *
 */

/** @file fbo-copytex-depth-max.c
 *
 * Tests that glCopyTexImage2D can be used to copy from fbo with max supported size
 * into depth texture.
 */

#include "piglit-util.h"

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

enum piglit_result
piglit_display(void)
{
	GLboolean pass = GL_TRUE;
	GLuint tex, fb, rb;
	GLint maxTextureSize, maxRenderbufferSize, textureSize;
	GLenum status;
	GLubyte *depth = NULL;

	glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);
	glGetIntegerv(GL_MAX_RENDERBUFFER_SIZE, &maxRenderbufferSize);
	textureSize = (maxTextureSize > maxRenderbufferSize) ? maxRenderbufferSize:maxTextureSize;

	glGenTextures(1, &tex);
	glBindTexture(GL_TEXTURE_2D, tex);

	glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT,
		     textureSize, textureSize,
		     0,
		     GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL);

	assert(glGetError() == 0);

	glGenFramebuffersEXT(1, &fb);
	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
	glGenRenderbuffersEXT(1, &rb);
	glBindRenderbufferEXT(GL_RENDERBUFFER, rb);
	glRenderbufferStorageEXT(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, textureSize, textureSize);
	glFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rb);
	glDrawBuffer(GL_NONE);
	glReadBuffer(GL_NONE);
	
	assert(glGetError() == 0);

	status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
	if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
		fprintf(stderr, "FBO incomplete\n");
		piglit_report_result(PIGLIT_SKIP);
	}

	glClearDepth(0.5);
	glClear(GL_DEPTH_BUFFER_BIT);

	glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, 0, 0, 100, 100, 0);

	depth = malloc(sizeof(GLubyte) * textureSize * textureSize);
	glGetTexImage(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, depth);
	if (depth[0] != 127)
		pass = GL_FALSE;

	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
	free(depth);
	glDeleteRenderbuffersEXT(1, &rb);
	glDeleteFramebuffersEXT(1, &fb);
	glDeleteTextures(1, &tex);

	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}

void piglit_init(int argc, char **argv)
{
	piglit_require_extension("GL_EXT_framebuffer_object");
}