gzdoom/tools/drawergen/fixedfunction/drawskycodegen.h

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/*
** DrawSky 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 DrawSkyVariant
{
Single,
Double
};
class DrawSkyCodegen : public DrawerCodegen
{
public:
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void Generate(DrawSkyVariant variant, SSAValue args, SSAValue thread_data);
private:
void Loop(DrawSkyVariant variant, bool fade_sky);
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SSAVec4i Sample(SSAInt frac, DrawSkyVariant variant);
SSAVec4i FadeOut(SSAInt frac, SSAVec4i color);
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SSAStack<SSAInt> stack_index, stack_frac;
SSAUBytePtr dest;
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SSAUBytePtr source0;
SSAUBytePtr source1;
SSAInt pitch;
SSAInt count;
SSAInt dest_y;
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SSAInt texturefrac;
SSAInt iscale;
SSAInt textureheight0;
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SSAInt maxtextureheight1;
SSAVec4i top_color;
SSAVec4i bottom_color;
SSAWorkerThread thread;
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SSAInt fracstep;
SSABool is_fade_sky;
};