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raze/source/common/rendering/polyrenderer/drawers/screen_blend.h

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/*
** Polygon Doom software renderer
** Copyright (c) 2016 Magnus Norddahl
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
*/
#pragma once
class PolyTriangleThreadData;
enum SWBlendColor
{
SWBLEND_Sub = 1,
SWBLEND_RevSub = 2
};
struct BlendColorOpt_Add { static const int Flags = 0; };
struct BlendColorOpt_Sub { static const int Flags = 1; };
struct BlendColorOpt_RevSub { static const int Flags = 2; };
template<typename OptT>
void BlendColor(int y, int x0, int x1, PolyTriangleThreadData* thread);
void BlendColorOpaque(int y, int x0, int x1, PolyTriangleThreadData* thread);
void BlendColorOpaque(int y, int x0, int x1, PolyTriangleThreadData* thread);
void BlendColorAdd_Src_InvSrc(int y, int x0, int x1, PolyTriangleThreadData* thread);
void BlendColorAdd_SrcCol_InvSrcCol(int y, int x0, int x1, PolyTriangleThreadData* thread);
void BlendColorAdd_Src_One(int y, int x0, int x1, PolyTriangleThreadData* thread);
void BlendColorAdd_SrcCol_One(int y, int x0, int x1, PolyTriangleThreadData* thread);
void BlendColorAdd_DstCol_Zero(int y, int x0, int x1, PolyTriangleThreadData* thread);
void BlendColorAdd_InvDstCol_Zero(int y, int x0, int x1, PolyTriangleThreadData* thread);
void BlendColorRevSub_Src_One(int y, int x0, int x1, PolyTriangleThreadData* thread);
void SelectWriteColorFunc(PolyTriangleThreadData* thread);