src/OpenGL/libGLES_CM/utilities.h

// SwiftShader Software Renderer
//
// Copyright(c) 2005-2013 TransGaming Inc.
//
// All rights reserved. No part of this software may be copied, distributed, transmitted,
// transcribed, stored in a retrieval system, translated into any human or computer
// language by any means, or disclosed to third parties without the explicit written
// agreement of TransGaming Inc. Without such an agreement, no rights or licenses, express
// or implied, including but not limited to any patent rights, are granted to you.
//

// utilities.h: Conversion functions and other utility routines.

#ifndef LIBGLES_CM_UTILITIES_H
#define LIBGLES_CM_UTILITIES_H

#include "Device.hpp"
#include "common/Image.hpp"
#include "Texture.h"

#include <GLES/gl.h>
#include <GLES/glext.h>

#include <string>

namespace es1
{
	struct Color;

	bool IsCompressed(GLenum format);
	bool IsDepthTexture(GLenum format);
	bool IsStencilTexture(GLenum format);
	bool IsCubemapTextureTarget(GLenum target);
	int CubeFaceIndex(GLenum cubeTarget);
	bool IsTextureTarget(GLenum target);
	bool CheckTextureFormatType(GLenum format, GLenum type);

	bool IsColorRenderable(GLenum internalformat);
	bool IsDepthRenderable(GLenum internalformat);
	bool IsStencilRenderable(GLenum internalformat);

	bool IsAlpha(GLenum texFormat);
	bool IsRGB(GLenum texFormat);
	bool IsRGBA(GLenum texFormat);
}

namespace es2sw
{
	sw::DepthCompareMode ConvertDepthComparison(GLenum comparison);
	sw::StencilCompareMode ConvertStencilComparison(GLenum comparison);
	sw::AlphaCompareMode ConvertAlphaComparison(GLenum comparison);
	sw::Color<float> ConvertColor(es1::Color color);
	sw::BlendFactor ConvertBlendFunc(GLenum blend);
	sw::BlendOperation ConvertBlendOp(GLenum blendOp);
	sw::LogicalOperation ConvertLogicalOperation(GLenum logicalOperation);
	sw::StencilOperation ConvertStencilOp(GLenum stencilOp);
	sw::AddressingMode ConvertTextureWrap(GLenum wrap);
	sw::CullMode ConvertCullMode(GLenum cullFace, GLenum frontFace);
	unsigned int ConvertColorMask(bool red, bool green, bool blue, bool alpha);
	sw::FilterType ConvertMagFilter(GLenum magFilter);
	void ConvertMinFilter(GLenum texFilter, sw::FilterType *minFilter, sw::MipmapType *mipFilter, float maxAnisotropy);
	bool ConvertPrimitiveType(GLenum primitiveType, GLsizei elementCount,  es1::PrimitiveType &swPrimitiveType, int &primitiveCount);
	sw::Format ConvertRenderbufferFormat(GLenum format);
	sw::TextureStage::StageOperation ConvertCombineOperation(GLenum operation);
	sw::TextureStage::SourceArgument ConvertSourceArgument(GLenum argument);
	sw::TextureStage::ArgumentModifier ConvertSourceOperand(GLenum operand);
}

namespace sw2es
{
	GLuint GetAlphaSize(sw::Format colorFormat);
	GLuint GetRedSize(sw::Format colorFormat);
	GLuint GetGreenSize(sw::Format colorFormat);
	GLuint GetBlueSize(sw::Format colorFormat);
	GLuint GetDepthSize(sw::Format depthFormat);
	GLuint GetStencilSize(sw::Format stencilFormat);

	GLenum ConvertBackBufferFormat(sw::Format format);
	GLenum ConvertDepthStencilFormat(sw::Format format);
}

#endif  // LIBGLES_CM_UTILITIES_H