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105 lines
4.1 KiB
C++
105 lines
4.1 KiB
C++
/*
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** Triangle drawers
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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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#ifndef __R_POLY_TRIANGLE__
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#define __R_POLY_TRIANGLE__
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#include "r_triangle.h"
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struct ScreenPolyTriangleDrawerArgs;
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class PolyTriangleDrawer
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{
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public:
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static void draw(const TriUniforms &uniforms, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, FTexture *texture);
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static void fill(const TriUniforms &uniforms, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, int solidcolor);
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private:
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static TriVertex shade_vertex(const TriUniforms &uniforms, TriVertex v);
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static void draw_arrays(const TriUniforms &uniforms, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, const uint8_t *texturePixels, int textureWidth, int textureHeight, int solidcolor, DrawerThread *thread, void(*drawfunc)(const ScreenPolyTriangleDrawerArgs *, DrawerThread *));
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static void draw_shaded_triangle(const TriVertex *vertices, bool ccw, ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread, void(*drawfunc)(const ScreenPolyTriangleDrawerArgs *, DrawerThread *));
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static bool cullhalfspace(float clipdistance1, float clipdistance2, float &t1, float &t2);
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static void clipedge(const TriVertex *verts, TriVertex *clippedvert, int &numclipvert);
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static void queue_arrays(const TriUniforms &uniforms, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, const uint8_t *texturePixels, int textureWidth, int textureHeight, int solidcolor);
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friend class DrawPolyTrianglesCommand;
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};
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struct ScreenPolyTriangleDrawerArgs
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{
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uint8_t *dest;
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int pitch;
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TriVertex *v1;
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TriVertex *v2;
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TriVertex *v3;
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int clipleft;
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int clipright;
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int cliptop;
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int clipbottom;
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const uint8_t *texturePixels;
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int textureWidth;
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int textureHeight;
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int solidcolor;
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const TriUniforms *uniforms;
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};
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class ScreenPolyTriangleDrawer
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{
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public:
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static void draw(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread);
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static void fill(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread);
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static void draw32(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread);
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static void fill32(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread);
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private:
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static float gradx(float x0, float y0, float x1, float y1, float x2, float y2, float c0, float c1, float c2);
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static float grady(float x0, float y0, float x1, float y1, float x2, float y2, float c0, float c1, float c2);
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};
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class DrawPolyTrianglesCommand : public DrawerCommand
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{
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public:
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DrawPolyTrianglesCommand(const TriUniforms &uniforms, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, const uint8_t *texturePixels, int textureWidth, int textureHeight, int solidcolor);
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void Execute(DrawerThread *thread) override;
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FString DebugInfo() override;
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private:
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TriUniforms uniforms;
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const TriVertex *vinput;
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int vcount;
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TriangleDrawMode mode;
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bool ccw;
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int clipleft;
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int clipright;
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int cliptop;
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int clipbottom;
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const uint8_t *texturePixels;
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int textureWidth;
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int textureHeight;
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int solidcolor;
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};
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#endif
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