/* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

 *

 * 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 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

 * BRIAN PAUL 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.

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 */

#include "common.h"

#include "hgl.h"

#include "context.h"

DGLRenderbuffer* DGLRenderbuffer_create(GLuint name)

{

	DGLRenderbuffer* buffer = malloc(sizeof(DGLRenderbuffer));

	if(buffer == NULL)

	{

		return NULL;

	}

	buffer->obj.name = name;

	buffer->obj.next = NULL;

	buffer->egl_image = NULL;

	return buffer;

}

void DGLRenderbuffer_destroy(DGLRenderbuffer *buffer)

{

	DGLES2_ASSERT(buffer != NULL);

	if(buffer->egl_image != NULL)

	{

		deglUnregisterImageTarget(buffer->egl_image, GL_RENDERBUFFER, buffer->obj.name);

		buffer->egl_image = NULL;

	}

	free(buffer);

}

GL_APICALL_BUILD void GL_APIENTRY glBindFramebuffer(GLenum target, GLuint framebuffer)

{

	DGLES2_ENTER();

	DGLContext_getHostError(ctx);

	ctx->hgl.BindFramebufferEXT(target, framebuffer);

	if(DGLContext_getHostError(ctx) == GL_NO_ERROR)

	{

		ctx->framebuffer_binding = framebuffer;

	}

	DGLES2_LEAVE();

}

GL_APICALL_BUILD void GL_APIENTRY glBindRenderbuffer(GLenum target, GLuint renderbuffer)

{

	DGLES2_ENTER();

	DGLContext_getHostError(ctx);

	ctx->hgl.BindRenderbufferEXT(target, renderbuffer);

	if(DGLContext_getHostError(ctx) == GL_NO_ERROR)

	{

		if(!DGLContext_bindRenderbuffer(ctx, renderbuffer))

		{

			DGLES2_ERROR(GL_OUT_OF_MEMORY);

		}

	}

	DGLES2_LEAVE_NO_ERROR_CHECK();

}

GL_APICALL_BUILD GLenum GL_APIENTRY glCheckFramebufferStatus(GLenum target)

{

	DGLES2_ENTER_RET(GL_FALSE);

	DGLES2_LEAVE_RET(ctx->hgl.CheckFramebufferStatusEXT(target));

}

GL_APICALL_BUILD void GL_APIENTRY glDeleteFramebuffers(GLsizei n, const GLuint* framebuffers)

{

	DGLES2_ENTER();

	DGLContext_getHostError(ctx);

	ctx->hgl.DeleteFramebuffersEXT(n, framebuffers);

	if(DGLContext_getHostError(ctx) == GL_NO_ERROR)

	{

		// Unbind framebuffer when deleted.

		int i;

		for(i = 0; i < n; i++)

		{

			if(ctx->framebuffer_binding == framebuffers[i])

			{

				ctx->framebuffer_binding = 0;

				break;

			}

		}

	}

	DGLES2_LEAVE_NO_ERROR_CHECK();

}

GL_APICALL_BUILD void GL_APIENTRY glDeleteRenderbuffers(GLsizei n, const GLuint* renderbuffers)

{

	DGLES2_ENTER();

	DGLContext_getHostError(ctx);

	ctx->hgl.DeleteRenderbuffersEXT(n, renderbuffers);

	if(DGLContext_getHostError(ctx) == GL_NO_ERROR)

	{

		int i;

		for(i = 0; i < n; i++)

		{

			DGLContext_destroyRenderbuffer(ctx, renderbuffers[n]);

		}

	}

	DGLES2_LEAVE();

}

GL_APICALL_BUILD void GL_APIENTRY glFramebufferRenderbuffer(GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer)

{

	DGLES2_ENTER();

	DGLES2_ERROR_IF(attachment != GL_COLOR_ATTACHMENT0 &&

					attachment != GL_DEPTH_ATTACHMENT &&

					attachment != GL_STENCIL_ATTACHMENT,

					GL_INVALID_ENUM);

	ctx->hgl.FramebufferRenderbufferEXT(target, attachment, renderbuffertarget, renderbuffer);

	DGLES2_LEAVE();

}

GL_APICALL_BUILD void GL_APIENTRY glFramebufferTexture2D(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level)

{

	DGLES2_ENTER();

	DGLES2_ERROR_IF(attachment != GL_COLOR_ATTACHMENT0 &&

					attachment != GL_DEPTH_ATTACHMENT &&

					attachment != GL_STENCIL_ATTACHMENT,

					GL_INVALID_ENUM);

	ctx->hgl.FramebufferTexture2DEXT(target, attachment, textarget, texture, level);

	DGLES2_LEAVE();

}

GL_APICALL_BUILD void GL_APIENTRY glGenFramebuffers(GLsizei n, GLuint* framebuffers)

{

	DGLES2_ENTER();

	ctx->hgl.GenFramebuffersEXT(n, framebuffers);

	DGLES2_LEAVE();

}

GL_APICALL_BUILD void GL_APIENTRY glGenRenderbuffers(GLsizei n, GLuint* renderbuffers)

{

	DGLES2_ENTER();

	ctx->hgl.GenRenderbuffersEXT(n, renderbuffers);

	DGLES2_LEAVE();

}

GL_APICALL_BUILD void GL_APIENTRY glGetFramebufferAttachmentParameteriv(GLenum target, GLenum attachment, GLenum pname, GLint* params)

{

	DGLES2_ENTER();

	DGLES2_ERROR_IF(attachment != GL_COLOR_ATTACHMENT0 &&

					attachment != GL_DEPTH_ATTACHMENT &&

					attachment != GL_STENCIL_ATTACHMENT,

					GL_INVALID_ENUM);

	DGLES2_ERROR_IF(pname != GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE &&

					pname != GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME &&

					pname != GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL &&

					pname != GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE,

					GL_INVALID_ENUM);

	ctx->hgl.GetFramebufferAttachmentParameterivEXT(target, attachment, pname, params);

	DGLES2_LEAVE();

}

GL_APICALL_BUILD void GL_APIENTRY glGetRenderbufferParameteriv(GLenum target, GLenum pname, GLint* params)

{

	DGLES2_ENTER();

	ctx->hgl.GetRenderbufferParameterivEXT(target, pname, params);

	DGLES2_LEAVE();

}

GL_APICALL_BUILD GLboolean GL_APIENTRY glIsFramebuffer(GLuint framebuffer)

{

	DGLES2_ENTER_RET(GL_FALSE);

	ctx->hgl.IsFramebufferEXT(framebuffer);

	DGLES2_LEAVE_RET(GL_FALSE);

}

GL_APICALL_BUILD GLboolean    GL_APIENTRY glIsRenderbuffer(GLuint renderbuffer)

{

	DGLES2_ENTER_RET(GL_FALSE);

	ctx->hgl.IsRenderbufferEXT(renderbuffer);

	DGLES2_LEAVE_RET(GL_FALSE);

}

GL_APICALL_BUILD void GL_APIENTRY glRenderbufferStorage(GLenum target, GLenum internalformat, GLsizei width, GLsizei height)

{

	DGLES2_ENTER();

	switch(internalformat)

	{

		case GL_DEPTH_COMPONENT16:

		case GL_RGBA4:

		case GL_RGB5_A1:

		case GL_STENCIL_INDEX8:

			break;

		case GL_RGB565:	// RGB565 is not supported in desktop GL.

			internalformat = GL_RGB8;

			break;

		case GL_DEPTH_COMPONENT24_OES: // extension GL_OES_depth24

			internalformat = GL_DEPTH_COMPONENT24;

			break;

		case GL_DEPTH_COMPONENT32_OES: // extension GL_OES_depth32

			internalformat = GL_DEPTH_COMPONENT32;

			break;

		case GL_RGB8_OES: // extension GL_OES_rgb8_rgba8

			internalformat = GL_RGB8;

			break;

		case GL_RGBA8_OES: // extension GL_OES_rgb8_rgba8

			internalformat = GL_RGBA8;

			break;

	}

	DGLContext_getHostError(ctx);

	ctx->hgl.RenderbufferStorageEXT(target, internalformat, width, height);

	if(DGLContext_getHostError(ctx) == GL_NO_ERROR)

	{

		DGLRenderbuffer* buffer = DGLContext_findRenderbuffer(ctx, ctx->renderbuffer_binding);

		DGLES2_ASSERT(buffer != NULL);

		if(buffer->egl_image != NULL)

		{

			// Renderbuffer is respecified. It is no longer an EGLImage sibling.

			deglUnregisterImageTarget(buffer->egl_image, GL_RENDERBUFFER, buffer->obj.name);

			buffer->egl_image = NULL;

		}

	}

	DGLES2_LEAVE_NO_ERROR_CHECK();

}

GL_APICALL_BUILD void GL_APIENTRY glEGLImageTargetRenderbufferStorageOES(GLenum target, GLeglImageOES image)

{

	DGLES2_ENTER();

	DGLES2_ERROR_IF(target != GL_RENDERBUFFER, GL_INVALID_ENUM);

	DGLES2_ERROR_IF(image == NULL, GL_INVALID_OPERATION);

	DGLContext_getHostError(ctx);

	if(!DGLContext_specifyRenderbufferFromEGLImage(ctx, image))

	{

		DGLES2_ERROR(GL_INVALID_OPERATION);

	}

	DGLES2_LEAVE_NO_ERROR_CHECK();

}