gzdoom/tools/drawergen/fixedfunction/drawspancodegen.h

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/*
** DrawSpan code generation
** 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
#include "drawercodegen.h"
enum class DrawSpanVariant
{
Opaque,
Masked,
Translucent,
MaskedTranslucent,
AddClamp,
MaskedAddClamp
};
class DrawSpanCodegen : public DrawerCodegen
{
public:
void Generate(DrawSpanVariant variant, SSAValue args);
private:
void LoopShade(DrawSpanVariant variant, bool isSimpleShade);
void LoopFilter(DrawSpanVariant variant, bool isSimpleShade, bool isNearestFilter);
SSAInt Loop4x(DrawSpanVariant variant, bool isSimpleShade, bool isNearestFilter, bool is64x64);
void Loop(SSAInt start, DrawSpanVariant variant, bool isSimpleShade, bool isNearestFilter, bool is64x64);
SSAVec4i Sample(SSAInt xfrac, SSAInt yfrac, bool isNearestFilter, bool is64x64);
SSAVec4i SampleLinear(SSAUBytePtr texture, SSAInt xfrac, SSAInt yfrac, SSAInt xbits, SSAInt ybits);
SSAVec4i Shade(SSAVec4i fg, bool isSimpleShade);
SSAVec4i Blend(SSAVec4i fg, SSAVec4i bg, DrawSpanVariant variant);
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SSAStack<SSAInt> stack_index, stack_xfrac, stack_yfrac, stack_light_index;
SSAStack<SSAVec4i> stack_lit_color;
SSAStack<SSAFloat> stack_viewpos_x;
SSAUBytePtr destorg;
SSAUBytePtr source;
SSAInt destpitch;
SSAInt xstep;
SSAInt ystep;
SSAInt x1;
SSAInt x2;
SSAInt y;
SSAInt xbits;
SSAInt ybits;
SSAInt light;
SSAInt srcalpha;
SSAInt destalpha;
SSAInt count;
SSAUBytePtr data;
SSAInt yshift;
SSAInt xshift;
SSAInt xmask;
SSABool is_64x64;
SSABool is_simple_shade;
SSABool is_nearest_filter;
SSAShadeConstants shade_constants;
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SSAFloat start_viewpos_x, step_viewpos_x;
SSAValue dynlights; // TriLight*
SSAInt num_dynlights;
SSAFloat viewpos_x;
};