mirror of https://github.com/minetest/irrlicht.git
347 lines
6.7 KiB
C++
347 lines
6.7 KiB
C++
// Copyright (C) 2002-2012 Nikolaus Gebhardt / Thomas Alten
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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#include "IrrCompileConfig.h"
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#include "IBurningShader.h"
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#ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
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// compile flag for this file
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#undef USE_ZBUFFER
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#undef IPOL_Z
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#undef CMP_Z
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#undef WRITE_Z
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#undef IPOL_W
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#undef CMP_W
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#undef WRITE_W
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#undef SUBTEXEL
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#undef INVERSE_W
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#undef IPOL_C0
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#undef IPOL_T0
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#undef IPOL_T1
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// define render case
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#define SUBTEXEL
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#define INVERSE_W
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//#define USE_ZBUFFER
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#define IPOL_W
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//#define CMP_W
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//#define WRITE_W
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#define IPOL_C0
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//#define IPOL_T0
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//#define IPOL_T1
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// apply global override
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#ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
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#undef INVERSE_W
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#endif
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#ifndef SOFTWARE_DRIVER_2_SUBTEXEL
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#undef SUBTEXEL
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#endif
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#if BURNING_MATERIAL_MAX_COLORS < 1
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#undef IPOL_C0
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#endif
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#if !defined ( SOFTWARE_DRIVER_2_USE_WBUFFER ) && defined ( USE_ZBUFFER )
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#ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
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#undef IPOL_W
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#endif
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#define IPOL_Z
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#ifdef CMP_W
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#undef CMP_W
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#define CMP_Z
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#endif
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#ifdef WRITE_W
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#undef WRITE_W
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#define WRITE_Z
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#endif
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#endif
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namespace irr
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{
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namespace video
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{
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class CTRTextureWire2 : public IBurningShader
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{
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public:
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//! constructor
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CTRTextureWire2(CBurningVideoDriver* driver);
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//! draws an indexed triangle list
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virtual void drawTriangle(const s4DVertex* burning_restrict a, const s4DVertex* burning_restrict b, const s4DVertex* burning_restrict c) _IRR_OVERRIDE_;
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virtual void drawLine ( const s4DVertex *a,const s4DVertex *b) _IRR_OVERRIDE_;
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virtual void drawPoint( const s4DVertex *a) _IRR_OVERRIDE_;
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virtual bool canWireFrame () _IRR_OVERRIDE_ { return true; }
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virtual bool canPointCloud() _IRR_OVERRIDE_ { return true; }
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protected:
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virtual void fragmentShader();
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void renderAlphaLine ( const s4DVertex *a,const s4DVertex *b ) const;
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void renderLine ( const s4DVertex *a,const s4DVertex *b, int renderZero = 0 ) const;
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};
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//! constructor
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CTRTextureWire2::CTRTextureWire2(CBurningVideoDriver* driver)
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: IBurningShader(driver)
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{
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#ifdef _DEBUG
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setDebugName("CTRTextureWire2");
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#endif
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}
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/*!
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2d line
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*/
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void CTRTextureWire2::renderLine ( const s4DVertex *a,const s4DVertex *b, int renderZero) const
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{
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int pitch0 = RenderTarget->getDimension().Width << SOFTWARE_DRIVER_2_RENDERTARGET_GRANULARITY;
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#ifdef USE_ZBUFFER
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int pitch1 = RenderTarget->getDimension().Width << 2;
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#endif
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//todo:!
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int aposx = fill_convention_none(a->Pos.x);
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int aposy = fill_convention_none(a->Pos.y);
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int bposx = fill_convention_none(b->Pos.x);
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int bposy = fill_convention_none(b->Pos.y);
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int dx = bposx - aposx;
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int dy = bposy - aposy;
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int c;
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int m;
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int d = 0;
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int run;
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tVideoSample *dst;
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#ifdef USE_ZBUFFER
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fp24 *z;
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#endif
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int xInc0 = 1 << SOFTWARE_DRIVER_2_RENDERTARGET_GRANULARITY;
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int yInc0 = pitch0;
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#ifdef USE_ZBUFFER
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int xInc1 = 4;
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int yInc1 = pitch1;
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#endif
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if ( dx < 0 )
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{
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xInc0 = - ( 1 << SOFTWARE_DRIVER_2_RENDERTARGET_GRANULARITY);
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#ifdef USE_ZBUFFER
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xInc1 = -4;
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#endif
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dx = -dx;
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}
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if ( dy > dx )
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{
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//swap
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s32 t;
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t = dx;dx=dy;dy=t;
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t = xInc0;xInc0=yInc0;yInc0=t;
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#ifdef USE_ZBUFFER
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t = xInc1;xInc1=yInc1;yInc1=t;
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#endif
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}
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if (0 == dx)
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{
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if (!renderZero) return;
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dx = 1;
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}
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SOFTWARE_DRIVER_2_CLIPCHECK_WIRE;
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dst = (tVideoSample*) ( (u8*) RenderTarget->getData() + ( aposy * pitch0 ) + (aposx* (1<< SOFTWARE_DRIVER_2_RENDERTARGET_GRANULARITY) ) );
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#ifdef USE_ZBUFFER
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z = (fp24*) ( (u8*) (fp24*) DepthBuffer->lock() + ( aposy * pitch1 ) + (aposx << 2 ) );
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#endif
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c = dx << 1;
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m = dy << 1;
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// slopes
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const f32 invDeltaX = fill_step_x( (f32)dx );
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#ifdef IPOL_Z
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f32 slopeZ = (b->Pos.z - a->Pos.z) * invDeltaX;
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f32 dataZ = a->Pos.z;
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#endif
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#ifdef IPOL_W
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fp24 slopeW = (b->Pos.w - a->Pos.w) * invDeltaX;
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fp24 dataW = a->Pos.w;
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#endif
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f32 inversew = FIX_POINT_F32_MUL;
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tVideoSample color;
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#if BURNING_MATERIAL_MAX_COLORS > 0
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tFixPoint r0, g0, b0;
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#ifdef IPOL_C0
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sVec4 slopeC;
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sVec4 C;
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slopeC = (b->Color[0] - a->Color[0]) * invDeltaX;
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C = a->Color[0];
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#endif
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#ifdef INVERSE_W
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inversew = fix_inverse32_color(dataW);
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#endif
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vec4_to_fix( r0, g0, b0, a->Color[0], inversew);
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color = fix_to_sample( r0, g0, b0 );
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#else
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color = (tVideoSample) 0xFFFFFFFF;
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#endif
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run = dx;
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while ( run )
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{
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#ifdef CMP_Z
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if ( *z >= dataZ )
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#endif
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#ifdef CMP_W
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if ( dataW >= *z )
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#endif
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{
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#ifdef WRITE_Z
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*z = dataZ;
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#endif
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#ifdef WRITE_W
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*z = dataW;
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#endif
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#ifdef IPOL_C0
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#ifdef INVERSE_W
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inversew = fix_inverse32_color(dataW);
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#endif
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vec4_to_fix(r0, g0, b0, C,inversew);
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color = fix_to_sample( r0, g0, b0 );
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#endif
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*dst = color;
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}
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dst = (tVideoSample*) ( (u8*) dst + xInc0 ); // x += xInc
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#ifdef CMP_Z
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z = (fp24*) ( (u8*) z + xInc1 );
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#endif
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#ifdef CMP_W
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z = (fp24*) ( (u8*) z + xInc1 );
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#endif
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d += m;
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if ( d > dx )
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{
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dst = (tVideoSample*) ( (u8*) dst + yInc0 ); // y += yInc
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#ifdef CMP_Z
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z = (fp24*) ( (u8*) z + yInc1 );
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#endif
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#ifdef CMP_W
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z = (fp24*) ( (u8*) z + yInc1 );
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#endif
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d -= c;
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}
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run -= 1;
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#ifdef IPOL_Z
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dataZ += slopeZ;
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#endif
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#ifdef IPOL_W
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dataW += slopeW;
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#endif
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#ifdef IPOL_C0
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C += slopeC;
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#endif
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}
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}
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void CTRTextureWire2::fragmentShader()
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{
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}
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void CTRTextureWire2::drawTriangle(const s4DVertex* burning_restrict a, const s4DVertex* burning_restrict b, const s4DVertex* burning_restrict c)
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{
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// sort on height, y
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if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
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if ( F32_A_GREATER_B ( b->Pos.y , c->Pos.y ) ) swapVertexPointer(&b, &c);
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if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
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renderLine ( a, b );
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renderLine ( b, c );
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renderLine ( a, c );
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}
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void CTRTextureWire2::drawLine ( const s4DVertex *a,const s4DVertex *b)
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{
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// query access to TexMaps
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// sort on height, y
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if (F32_A_GREATER_B(a->Pos.y,b->Pos.y )) swapVertexPointer(&a, &b);
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renderLine ( a, b );
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}
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void CTRTextureWire2::drawPoint(const s4DVertex *a)
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{
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if ( (a->flag & VERTEX4D_CLIPMASK ) == VERTEX4D_INSIDE ) renderLine(a, a,1);
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}
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} // end namespace video
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} // end namespace irr
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#endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
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namespace irr
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{
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namespace video
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{
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//! creates a flat triangle renderer
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IBurningShader* createTriangleRendererTextureGouraudWire2(CBurningVideoDriver* driver)
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{
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//ETR_TEXTURE_GOURAUD_WIRE
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#ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
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return new CTRTextureWire2(driver);
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#else
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return 0;
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#endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
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}
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} // end namespace video
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} // end namespace irr
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