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https://github.com/ZDoom/gzdoom.git
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135 lines
4 KiB
C++
135 lines
4 KiB
C++
/*
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** DrawTriangle code generation
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** Copyright (c) 2016 Magnus Norddahl
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any damages
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** arising from the use of this software.
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**
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** Permission is granted to anyone to use this software for any purpose,
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** including commercial applications, and to alter it and redistribute it
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** freely, subject to the following restrictions:
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**
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** 1. The origin of this software must not be misrepresented; you must not
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** claim that you wrote the original software. If you use this software
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** in a product, an acknowledgment in the product documentation would be
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** appreciated but is not required.
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** 2. Altered source versions must be plainly marked as such, and must not be
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** misrepresented as being the original software.
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** 3. This notice may not be removed or altered from any source distribution.
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**
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*/
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#pragma once
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#include "drawercodegen.h"
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struct SSATriVertex
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{
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SSAFloat x, y, z, w;
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SSAFloat varying[TriVertex::NumVarying];
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};
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class DrawTriangleCodegen : public DrawerCodegen
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{
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public:
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void Generate(TriDrawVariant variant, TriBlendMode blendmode, bool truecolor, SSAValue args, SSAValue thread_data);
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private:
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void LoadArgs(SSAValue args, SSAValue thread_data);
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SSATriVertex LoadTriVertex(SSAValue v);
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void LoadUniforms(SSAValue uniforms);
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void Setup();
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SSAInt FloatTo28_4(SSAFloat v);
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void LoopBlockY();
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void LoopBlockX();
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void LoopFullBlock();
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void LoopPartialBlock();
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void ProcessPixel(SSAUBytePtr buffer, SSAIntPtr subsectorbuffer, SSAInt *varying);
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SSAVec4i TranslateSample(SSAInt uvoffset);
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SSAVec4i Sample(SSAInt uvoffset);
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void SetStencilBlock(SSAInt block);
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void StencilSet(SSAInt x, SSAInt y, SSAUByte value);
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void StencilClear(SSAUByte value);
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SSAUByte StencilGet(SSAInt x, SSAInt y);
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SSAUByte StencilGetSingle();
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SSABool StencilIsSingleValue();
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SSAFloat gradx(SSAFloat x0, SSAFloat y0, SSAFloat x1, SSAFloat y1, SSAFloat x2, SSAFloat y2, SSAFloat c0, SSAFloat c1, SSAFloat c2);
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SSAFloat grady(SSAFloat x0, SSAFloat y0, SSAFloat x1, SSAFloat y1, SSAFloat x2, SSAFloat y2, SSAFloat c0, SSAFloat c1, SSAFloat c2);
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TriDrawVariant variant;
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TriBlendMode blendmode;
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bool truecolor;
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SSAStack<SSAInt> stack_C1, stack_C2, stack_C3;
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SSAStack<SSAInt> stack_y;
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SSAStack<SSAUBytePtr> stack_dest;
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SSAStack<SSAIntPtr> stack_subsectorGBuffer;
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SSAStack<SSAInt> stack_x;
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SSAStack<SSAUBytePtr> stack_buffer;
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SSAStack<SSAIntPtr> stack_subsectorbuffer;
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SSAStack<SSAInt> stack_iy, stack_ix;
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SSAStack<SSAInt> stack_varying[TriVertex::NumVarying];
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SSAStack<SSAInt> stack_CY1, stack_CY2, stack_CY3;
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SSAStack<SSAInt> stack_CX1, stack_CX2, stack_CX3;
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SSAUBytePtr dest;
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SSAInt pitch;
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SSATriVertex v1;
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SSATriVertex v2;
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SSATriVertex v3;
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SSAInt clipleft;
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SSAInt clipright;
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SSAInt cliptop;
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SSAInt clipbottom;
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SSAUBytePtr texturePixels;
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SSAInt textureWidth;
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SSAInt textureHeight;
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SSAUBytePtr translation;
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SSAInt color, srcalpha, destalpha;
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SSAInt light;
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SSAInt subsectorDepth;
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SSAShadeConstants shade_constants;
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SSABool is_simple_shade;
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SSABool is_nearest_filter;
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SSABool is_fixed_light;
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SSAUBytePtr stencilValues;
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SSAIntPtr stencilMasks;
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SSAInt stencilPitch;
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SSAUByte stencilTestValue;
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SSAUByte stencilWriteValue;
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SSAIntPtr subsectorGBuffer;
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SSAWorkerThread thread;
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// Block size, standard 8x8 (must be power of two)
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const int q = 8;
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SSAInt Y1, Y2, Y3;
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SSAInt X1, X2, X3;
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SSAInt DX12, DX23, DX31;
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SSAInt DY12, DY23, DY31;
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SSAInt FDX12, FDX23, FDX31;
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SSAInt FDY12, FDY23, FDY31;
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SSAInt minx, maxx, miny, maxy;
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SSAInt C1, C2, C3;
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SSAFloat gradWX, gradWY, startW;
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SSAFloat gradVaryingX[TriVertex::NumVarying], gradVaryingY[TriVertex::NumVarying], startVarying[TriVertex::NumVarying];
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SSAInt x, y;
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SSAInt x0, x1, y0, y1;
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SSAInt currentlight;
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SSAInt varyingPos[TriVertex::NumVarying];
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SSAInt varyingStepPos[TriVertex::NumVarying];
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SSAInt varyingStartStepX[TriVertex::NumVarying];
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SSAInt varyingIncrStepX[TriVertex::NumVarying];
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SSAUBytePtr StencilBlock;
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SSAIntPtr StencilBlockMask;
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};
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