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https://github.com/minetest/irrlicht.git
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8310a3fbad
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6000 dfc29bdd-3216-0410-991c-e03cc46cb475
667 lines
14 KiB
C++
667 lines
14 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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#ifndef SOFTWARE_DRIVER_2_USE_VERTEX_COLOR
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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 CTRTextureGouraudAdd2 : public IBurningShader
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{
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public:
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//! constructor
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CTRTextureGouraudAdd2(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 ) _IRR_OVERRIDE_;
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private:
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void scanline_bilinear ();
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sScanLineData line;
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};
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//! constructor
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CTRTextureGouraudAdd2::CTRTextureGouraudAdd2(CBurningVideoDriver* driver)
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: IBurningShader(driver)
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{
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#ifdef _DEBUG
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setDebugName("CTRTextureGouraudAdd2");
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#endif
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}
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/*!
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*/
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void CTRTextureGouraudAdd2::scanline_bilinear ()
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{
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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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s32 xStart;
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s32 xEnd;
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s32 dx;
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#ifdef SUBTEXEL
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f32 subPixel;
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#endif
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#ifdef IPOL_Z
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f32 slopeZ;
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#endif
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#ifdef IPOL_W
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fp24 slopeW;
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#endif
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#ifdef IPOL_C0
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sVec4 slopeC;
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#endif
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#ifdef IPOL_T0
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sVec2 slopeT[BURNING_MATERIAL_MAX_TEXTURES];
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#endif
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// apply top-left fill-convention, left
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xStart = core::ceil32( line.x[0] );
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xEnd = core::ceil32( line.x[1] ) - 1;
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dx = xEnd - xStart;
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if ( dx < 0 )
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return;
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// slopes
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const f32 invDeltaX = core::reciprocal_approxim ( line.x[1] - line.x[0] );
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#ifdef IPOL_Z
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slopeZ = (line.z[1] - line.z[0]) * invDeltaX;
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#endif
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#ifdef IPOL_W
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slopeW = (line.w[1] - line.w[0]) * invDeltaX;
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#endif
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#ifdef IPOL_C0
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slopeC = (line.c[1] - line.c[0]) * invDeltaX;
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#endif
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#ifdef IPOL_T0
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slopeT[0] = (line.t[0][1] - line.t[0][0]) * invDeltaX;
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#endif
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#ifdef IPOL_T1
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slopeT[1] = (line.t[1][1] - line.t[1][0]) * invDeltaX;
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#endif
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#ifdef SUBTEXEL
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subPixel = ( (f32) xStart ) - line.x[0];
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#ifdef IPOL_Z
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line.z[0] += slopeZ * subPixel;
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#endif
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#ifdef IPOL_W
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line.w[0] += slopeW * subPixel;
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#endif
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#ifdef IPOL_C0
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line.c[0] += slopeC * subPixel;
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#endif
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#ifdef IPOL_T0
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line.t[0][0] += slopeT[0] * subPixel;
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#endif
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#ifdef IPOL_T1
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line.t[1][0] += slopeT[1] * subPixel;
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#endif
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#endif
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dst = (tVideoSample*)RenderTarget->getData() + ( line.y * RenderTarget->getDimension().Width ) + xStart;
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#ifdef USE_ZBUFFER
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z = (fp24*) DepthBuffer->lock() + ( line.y * RenderTarget->getDimension().Width ) + xStart;
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#endif
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f32 inversew = FIX_POINT_F32_MUL;
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#ifdef BURNINGVIDEO_RENDERER_FAST
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u32 dIndex = ( line.y & 3 ) << 2;
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#else
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tFixPoint tx0;
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tFixPoint ty0;
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tFixPoint r0, g0, b0;
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tFixPoint r1, g1, b1;
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#endif
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for ( s32 i = 0; i <= dx; ++i )
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{
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#ifdef CMP_Z
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if ( line.z[0] < z[i] )
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#endif
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#ifdef CMP_W
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if ( line.w[0] >= z[i] )
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#endif
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{
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#ifdef BURNINGVIDEO_RENDERER_FAST
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const tFixPointu d = dithermask [ dIndex | ( i ) & 3 ];
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#ifdef INVERSE_W
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inversew = fix_inverse32 ( line.w[0] );
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#endif
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dst[i] = PixelAdd32 (
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dst[i],
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getTexel_plain ( &IT[0], d + tofix ( line.t[0][0].x,inversew),
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d + tofix ( line.t[0][0].y,inversew) )
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);
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#else
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#ifdef INVERSE_W
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inversew = fix_inverse32 ( line.w[0] );
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#endif
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tx0 = tofix ( line.t[0][0].x,inversew);
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ty0 = tofix ( line.t[0][0].y,inversew);
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getSample_texture ( r0, g0, b0, &IT[0], tx0,ty0 );
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color_to_fix ( r1, g1, b1, dst[i] );
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dst[i] = fix_to_color ( clampfix_maxcolor ( r1 + r0 ),
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clampfix_maxcolor ( g1 + g0 ),
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clampfix_maxcolor ( b1 + b0 )
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);
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#endif
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#ifdef WRITE_Z
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z[i] = line.z[0];
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#endif
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#ifdef WRITE_W
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z[i] = line.w[0];
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#endif
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}
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#ifdef IPOL_Z
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line.z[0] += slopeZ;
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#endif
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#ifdef IPOL_W
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line.w[0] += slopeW;
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#endif
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#ifdef IPOL_C0
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line.c[0] += slopeC;
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#endif
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#ifdef IPOL_T0
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line.t[0][0] += slopeT[0];
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#endif
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#ifdef IPOL_T1
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line.t[1][0] += slopeT[1];
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#endif
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}
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}
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void CTRTextureGouraudAdd2::drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c )
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{
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sScanConvertData scan;
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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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const f32 ca = c->Pos.y - a->Pos.y;
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const f32 ba = b->Pos.y - a->Pos.y;
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const f32 cb = c->Pos.y - b->Pos.y;
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// calculate delta y of the edges
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scan.invDeltaY[0] = core::reciprocal( ca );
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scan.invDeltaY[1] = core::reciprocal( ba );
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scan.invDeltaY[2] = core::reciprocal( cb );
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// find if the major edge is left or right aligned
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f32 temp[4];
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temp[0] = a->Pos.x - c->Pos.x;
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temp[1] = -ca;
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temp[2] = b->Pos.x - a->Pos.x;
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temp[3] = ba;
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scan.left = ( temp[0] * temp[3] - temp[1] * temp[2] ) > 0.f ? 0 : 1;
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scan.right = 1 - scan.left;
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// calculate slopes for the major edge
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scan.slopeX[0] = (c->Pos.x - a->Pos.x) * scan.invDeltaY[0];
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scan.x[0] = a->Pos.x;
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#ifdef IPOL_Z
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scan.slopeZ[0] = (c->Pos.z - a->Pos.z) * scan.invDeltaY[0];
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scan.z[0] = a->Pos.z;
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#endif
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#ifdef IPOL_W
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scan.slopeW[0] = (c->Pos.w - a->Pos.w) * scan.invDeltaY[0];
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scan.w[0] = a->Pos.w;
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#endif
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#ifdef IPOL_C0
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scan.slopeC[0] = (c->Color[0] - a->Color[0]) * scan.invDeltaY[0];
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scan.c[0] = a->Color[0];
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#endif
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#ifdef IPOL_T0
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scan.slopeT[0][0] = (c->Tex[0] - a->Tex[0]) * scan.invDeltaY[0];
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scan.t[0][0] = a->Tex[0];
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#endif
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#ifdef IPOL_T1
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scan.slopeT[1][0] = (c->Tex[1] - a->Tex[1]) * scan.invDeltaY[0];
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scan.t[1][0] = a->Tex[1];
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#endif
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// top left fill convention y run
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s32 yStart;
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s32 yEnd;
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#ifdef SUBTEXEL
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f32 subPixel;
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#endif
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// rasterize upper sub-triangle
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if ( F32_GREATER_0 ( scan.invDeltaY[1] ) )
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{
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// calculate slopes for top edge
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scan.slopeX[1] = (b->Pos.x - a->Pos.x) * scan.invDeltaY[1];
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scan.x[1] = a->Pos.x;
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#ifdef IPOL_Z
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scan.slopeZ[1] = (b->Pos.z - a->Pos.z) * scan.invDeltaY[1];
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scan.z[1] = a->Pos.z;
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#endif
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#ifdef IPOL_W
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scan.slopeW[1] = (b->Pos.w - a->Pos.w) * scan.invDeltaY[1];
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scan.w[1] = a->Pos.w;
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#endif
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#ifdef IPOL_C0
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scan.slopeC[1] = (b->Color[0] - a->Color[0]) * scan.invDeltaY[1];
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scan.c[1] = a->Color[0];
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#endif
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#ifdef IPOL_T0
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scan.slopeT[0][1] = (b->Tex[0] - a->Tex[0]) * scan.invDeltaY[1];
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scan.t[0][1] = a->Tex[0];
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#endif
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#ifdef IPOL_T1
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scan.slopeT[1][1] = (b->Tex[1] - a->Tex[1]) * scan.invDeltaY[1];
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scan.t[1][1] = a->Tex[1];
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#endif
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// apply top-left fill convention, top part
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yStart = core::ceil32( a->Pos.y );
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yEnd = core::ceil32( b->Pos.y ) - 1;
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#ifdef SUBTEXEL
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subPixel = ( (f32) yStart ) - a->Pos.y;
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// correct to pixel center
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scan.x[0] += scan.slopeX[0] * subPixel;
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scan.x[1] += scan.slopeX[1] * subPixel;
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#ifdef IPOL_Z
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scan.z[0] += scan.slopeZ[0] * subPixel;
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scan.z[1] += scan.slopeZ[1] * subPixel;
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#endif
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#ifdef IPOL_W
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scan.w[0] += scan.slopeW[0] * subPixel;
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scan.w[1] += scan.slopeW[1] * subPixel;
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#endif
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#ifdef IPOL_C0
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scan.c[0] += scan.slopeC[0] * subPixel;
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scan.c[1] += scan.slopeC[1] * subPixel;
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#endif
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#ifdef IPOL_T0
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scan.t[0][0] += scan.slopeT[0][0] * subPixel;
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scan.t[0][1] += scan.slopeT[0][1] * subPixel;
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#endif
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#ifdef IPOL_T1
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scan.t[1][0] += scan.slopeT[1][0] * subPixel;
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scan.t[1][1] += scan.slopeT[1][1] * subPixel;
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#endif
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#endif
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// rasterize the edge scanlines
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for( line.y = yStart; line.y <= yEnd; ++line.y)
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{
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line.x[scan.left] = scan.x[0];
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line.x[scan.right] = scan.x[1];
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#ifdef IPOL_Z
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line.z[scan.left] = scan.z[0];
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line.z[scan.right] = scan.z[1];
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#endif
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#ifdef IPOL_W
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line.w[scan.left] = scan.w[0];
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line.w[scan.right] = scan.w[1];
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#endif
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#ifdef IPOL_C0
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line.c[scan.left] = scan.c[0];
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line.c[scan.right] = scan.c[1];
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#endif
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#ifdef IPOL_T0
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line.t[0][scan.left] = scan.t[0][0];
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line.t[0][scan.right] = scan.t[0][1];
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#endif
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#ifdef IPOL_T1
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line.t[1][scan.left] = scan.t[1][0];
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line.t[1][scan.right] = scan.t[1][1];
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#endif
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// render a scanline
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scanline_bilinear ();
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scan.x[0] += scan.slopeX[0];
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scan.x[1] += scan.slopeX[1];
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#ifdef IPOL_Z
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scan.z[0] += scan.slopeZ[0];
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scan.z[1] += scan.slopeZ[1];
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#endif
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#ifdef IPOL_W
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scan.w[0] += scan.slopeW[0];
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scan.w[1] += scan.slopeW[1];
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#endif
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#ifdef IPOL_C0
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scan.c[0] += scan.slopeC[0];
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scan.c[1] += scan.slopeC[1];
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#endif
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#ifdef IPOL_T0
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scan.t[0][0] += scan.slopeT[0][0];
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scan.t[0][1] += scan.slopeT[0][1];
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#endif
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#ifdef IPOL_T1
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scan.t[1][0] += scan.slopeT[1][0];
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scan.t[1][1] += scan.slopeT[1][1];
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#endif
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}
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}
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// rasterize lower sub-triangle
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if ( (f32) 0.0 != scan.invDeltaY[2] )
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{
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// advance to middle point
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if( (f32) 0.0 != scan.invDeltaY[1] )
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{
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temp[0] = b->Pos.y - a->Pos.y; // dy
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scan.x[0] = a->Pos.x + scan.slopeX[0] * temp[0];
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#ifdef IPOL_Z
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scan.z[0] = a->Pos.z + scan.slopeZ[0] * temp[0];
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#endif
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#ifdef IPOL_W
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scan.w[0] = a->Pos.w + scan.slopeW[0] * temp[0];
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#endif
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#ifdef IPOL_C0
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scan.c[0] = a->Color[0] + scan.slopeC[0] * temp[0];
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#endif
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#ifdef IPOL_T0
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scan.t[0][0] = a->Tex[0] + scan.slopeT[0][0] * temp[0];
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#endif
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#ifdef IPOL_T1
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scan.t[1][0] = a->Tex[1] + scan.slopeT[1][0] * temp[0];
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#endif
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}
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// calculate slopes for bottom edge
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scan.slopeX[1] = (c->Pos.x - b->Pos.x) * scan.invDeltaY[2];
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scan.x[1] = b->Pos.x;
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#ifdef IPOL_Z
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scan.slopeZ[1] = (c->Pos.z - b->Pos.z) * scan.invDeltaY[2];
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scan.z[1] = b->Pos.z;
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#endif
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#ifdef IPOL_W
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scan.slopeW[1] = (c->Pos.w - b->Pos.w) * scan.invDeltaY[2];
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scan.w[1] = b->Pos.w;
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#endif
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#ifdef IPOL_C0
|
|
scan.slopeC[1] = (c->Color[0] - b->Color[0]) * scan.invDeltaY[2];
|
|
scan.c[1] = b->Color[0];
|
|
#endif
|
|
|
|
#ifdef IPOL_T0
|
|
scan.slopeT[0][1] = (c->Tex[0] - b->Tex[0]) * scan.invDeltaY[2];
|
|
scan.t[0][1] = b->Tex[0];
|
|
#endif
|
|
|
|
#ifdef IPOL_T1
|
|
scan.slopeT[1][1] = (c->Tex[1] - b->Tex[1]) * scan.invDeltaY[2];
|
|
scan.t[1][1] = b->Tex[1];
|
|
#endif
|
|
|
|
// apply top-left fill convention, top part
|
|
yStart = core::ceil32( b->Pos.y );
|
|
yEnd = core::ceil32( c->Pos.y ) - 1;
|
|
|
|
#ifdef SUBTEXEL
|
|
|
|
subPixel = ( (f32) yStart ) - b->Pos.y;
|
|
|
|
// correct to pixel center
|
|
scan.x[0] += scan.slopeX[0] * subPixel;
|
|
scan.x[1] += scan.slopeX[1] * subPixel;
|
|
|
|
#ifdef IPOL_Z
|
|
scan.z[0] += scan.slopeZ[0] * subPixel;
|
|
scan.z[1] += scan.slopeZ[1] * subPixel;
|
|
#endif
|
|
|
|
#ifdef IPOL_W
|
|
scan.w[0] += scan.slopeW[0] * subPixel;
|
|
scan.w[1] += scan.slopeW[1] * subPixel;
|
|
#endif
|
|
|
|
#ifdef IPOL_C0
|
|
scan.c[0] += scan.slopeC[0] * subPixel;
|
|
scan.c[1] += scan.slopeC[1] * subPixel;
|
|
#endif
|
|
|
|
#ifdef IPOL_T0
|
|
scan.t[0][0] += scan.slopeT[0][0] * subPixel;
|
|
scan.t[0][1] += scan.slopeT[0][1] * subPixel;
|
|
#endif
|
|
|
|
#ifdef IPOL_T1
|
|
scan.t[1][0] += scan.slopeT[1][0] * subPixel;
|
|
scan.t[1][1] += scan.slopeT[1][1] * subPixel;
|
|
#endif
|
|
|
|
#endif
|
|
|
|
// rasterize the edge scanlines
|
|
for( line.y = yStart; line.y <= yEnd; ++line.y)
|
|
{
|
|
line.x[scan.left] = scan.x[0];
|
|
line.x[scan.right] = scan.x[1];
|
|
|
|
#ifdef IPOL_Z
|
|
line.z[scan.left] = scan.z[0];
|
|
line.z[scan.right] = scan.z[1];
|
|
#endif
|
|
|
|
#ifdef IPOL_W
|
|
line.w[scan.left] = scan.w[0];
|
|
line.w[scan.right] = scan.w[1];
|
|
#endif
|
|
|
|
#ifdef IPOL_C0
|
|
line.c[scan.left] = scan.c[0];
|
|
line.c[scan.right] = scan.c[1];
|
|
#endif
|
|
|
|
#ifdef IPOL_T0
|
|
line.t[0][scan.left] = scan.t[0][0];
|
|
line.t[0][scan.right] = scan.t[0][1];
|
|
#endif
|
|
|
|
#ifdef IPOL_T1
|
|
line.t[1][scan.left] = scan.t[1][0];
|
|
line.t[1][scan.right] = scan.t[1][1];
|
|
#endif
|
|
|
|
// render a scanline
|
|
scanline_bilinear ();
|
|
|
|
scan.x[0] += scan.slopeX[0];
|
|
scan.x[1] += scan.slopeX[1];
|
|
|
|
#ifdef IPOL_Z
|
|
scan.z[0] += scan.slopeZ[0];
|
|
scan.z[1] += scan.slopeZ[1];
|
|
#endif
|
|
|
|
#ifdef IPOL_W
|
|
scan.w[0] += scan.slopeW[0];
|
|
scan.w[1] += scan.slopeW[1];
|
|
#endif
|
|
|
|
#ifdef IPOL_C0
|
|
scan.c[0] += scan.slopeC[0];
|
|
scan.c[1] += scan.slopeC[1];
|
|
#endif
|
|
|
|
#ifdef IPOL_T0
|
|
scan.t[0][0] += scan.slopeT[0][0];
|
|
scan.t[0][1] += scan.slopeT[0][1];
|
|
#endif
|
|
|
|
#ifdef IPOL_T1
|
|
scan.t[1][0] += scan.slopeT[1][0];
|
|
scan.t[1][1] += scan.slopeT[1][1];
|
|
#endif
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
} // end namespace video
|
|
} // end namespace irr
|
|
|
|
#endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
|
|
|
|
namespace irr
|
|
{
|
|
namespace video
|
|
{
|
|
|
|
//! creates a flat triangle renderer
|
|
IBurningShader* createTRTextureGouraudAdd2(CBurningVideoDriver* driver)
|
|
{
|
|
#ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
|
|
return new CTRTextureGouraudAdd2(driver);
|
|
#else
|
|
return 0;
|
|
#endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
|
|
}
|
|
|
|
|
|
} // end namespace video
|
|
} // end namespace irr
|
|
|
|
|
|
|