299 lines
5.1 KiB
C++
299 lines
5.1 KiB
C++
// Copyright (C) 2002-2011 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 !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 *a,const s4DVertex *b,const s4DVertex *c );
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virtual void drawLine ( const s4DVertex *a,const s4DVertex *b);
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private:
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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 ) 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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// swap integer with xor
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static inline void swap_xor ( s32 &a, s32 &b )
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{
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a ^= b;
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b ^= a;
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a ^= b;
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}
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/*!
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*/
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void CTRTextureWire2::renderLine ( const s4DVertex *a,const s4DVertex *b ) const
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{
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int pitch0 = RenderTarget->getDimension().Width << VIDEO_SAMPLE_GRANULARITY;
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int pitch1 = RenderTarget->getDimension().Width << 2;
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int aposx = (int) a->Pos.x;
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int aposy = (int) a->Pos.y;
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int bposx = (int) b->Pos.x;
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int bposy = (int) 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 << VIDEO_SAMPLE_GRANULARITY;
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int yInc0 = pitch0;
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int xInc1 = 4;
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int yInc1 = pitch1;
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tVideoSample color;
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#ifdef SOFTWARE_DRIVER_2_USE_VERTEX_COLOR
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tFixPoint r0, g0, b0;
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getSample_color ( r0, g0, b0, a->Color[0] );
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color = fix_to_color ( r0, g0, b0 );
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#else
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color = (tVideoSample) 0xFFFFFFFF;
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#endif
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if ( dx < 0 )
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{
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xInc0 = - ( 1 << VIDEO_SAMPLE_GRANULARITY);
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xInc1 = -4;
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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_xor ( dx, dy );
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swap_xor ( xInc0, yInc0 );
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swap_xor ( xInc1, yInc1 );
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}
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if ( 0 == dx )
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return;
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dst = (tVideoSample*) ( (u8*) (tVideoSample*)RenderTarget->lock() + ( aposy * pitch0 ) + (aposx << VIDEO_SAMPLE_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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#ifdef IPOL_Z
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f32 slopeZ = (b->Pos.z - a->Pos.z) / f32(dx);
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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) / f32( dx );
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fp24 dataW = a->Pos.w;
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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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*dst = color;
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}
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dst = (tVideoSample*) ( (u8*) dst + xInc0 ); // x += xInc
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#ifdef IPOL_Z
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z = (fp24*) ( (u8*) z + xInc1 );
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#endif
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#ifdef IPOL_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 IPOL_Z
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z = (fp24*) ( (u8*) z + yInc1 );
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#endif
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#ifdef IPOL_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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}
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}
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void CTRTextureWire2::drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c )
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{
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sScanLineData line;
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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 ( a->Pos.y > b->Pos.y ) swapVertexPointer(&a, &b);
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renderLine ( a, b );
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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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#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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