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477 lines
12 KiB
C++
477 lines
12 KiB
C++
/*
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** bitmap.cpp
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**
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**---------------------------------------------------------------------------
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** Copyright 2008 Christoph Oelckers
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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**
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*/
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#include "bitmap.h"
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#include "r_data/r_translate.h"
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#include "r_data/colormaps.h"
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//===========================================================================
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//
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// multi-format pixel copy with colormap application
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// requires the previously defined conversion classes to work
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//
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//===========================================================================
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template<class TSrc, class TDest, class TBlend>
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void iCopyColors(uint8_t *pout, const uint8_t *pin, int count, int step, FCopyInfo *inf,
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uint8_t tr, uint8_t tg, uint8_t tb)
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{
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int i;
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int fac;
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uint8_t r,g,b;
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int gray;
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int a;
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switch(inf? inf->blend : BLEND_NONE)
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{
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case BLEND_NONE:
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for(i=0;i<count;i++)
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{
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a = TSrc::A(pin, tr, tg, tb);
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if (TBlend::ProcessAlpha0() || a)
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{
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TBlend::OpC(pout[TDest::RED], TSrc::R(pin), a, inf);
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TBlend::OpC(pout[TDest::GREEN], TSrc::G(pin), a, inf);
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TBlend::OpC(pout[TDest::BLUE], TSrc::B(pin), a, inf);
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TBlend::OpA(pout[TDest::ALPHA], a, inf);
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}
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pout+=4;
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pin+=step;
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}
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break;
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case BLEND_ICEMAP:
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// Create the ice translation table, based on Hexen's.
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// Since this is done in True Color the purplish tint is fully preserved - even in Doom!
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for(i=0;i<count;i++)
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{
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a = TSrc::A(pin, tr, tg, tb);
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if (TBlend::ProcessAlpha0() || a)
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{
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int gray = TSrc::Gray(pin)>>4;
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TBlend::OpC(pout[TDest::RED], IcePalette[gray][0], a, inf);
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TBlend::OpC(pout[TDest::GREEN], IcePalette[gray][1], a, inf);
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TBlend::OpC(pout[TDest::BLUE], IcePalette[gray][2], a, inf);
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TBlend::OpA(pout[TDest::ALPHA], a, inf);
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}
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pout+=4;
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pin+=step;
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}
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break;
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default:
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if (inf->blend >= BLEND_SPECIALCOLORMAP1)
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{
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FSpecialColormap *cm = &SpecialColormaps[inf->blend - BLEND_SPECIALCOLORMAP1];
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for(i=0;i<count;i++)
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{
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a = TSrc::A(pin, tr, tg, tb);
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if (TBlend::ProcessAlpha0() || a)
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{
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gray = clamp<int>(TSrc::Gray(pin),0,255);
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PalEntry pe = cm->GrayscaleToColor[gray];
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TBlend::OpC(pout[TDest::RED], pe.r , a, inf);
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TBlend::OpC(pout[TDest::GREEN], pe.g, a, inf);
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TBlend::OpC(pout[TDest::BLUE], pe.b, a, inf);
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TBlend::OpA(pout[TDest::ALPHA], a, inf);
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}
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pout+=4;
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pin+=step;
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}
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}
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else if (inf->blend >= BLEND_DESATURATE1 && inf->blend<=BLEND_DESATURATE31)
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{
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// Desaturated light settings.
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fac=inf->blend-BLEND_DESATURATE1+1;
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for(i=0;i<count;i++)
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{
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a = TSrc::A(pin, tr, tg, tb);
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if (TBlend::ProcessAlpha0() || a)
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{
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gray = TSrc::Gray(pin);
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r = (TSrc::R(pin)*(31-fac) + gray*fac)/31;
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g = (TSrc::G(pin)*(31-fac) + gray*fac)/31;
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b = (TSrc::B(pin)*(31-fac) + gray*fac)/31;
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TBlend::OpC(pout[TDest::RED], r, a, inf);
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TBlend::OpC(pout[TDest::GREEN], g, a, inf);
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TBlend::OpC(pout[TDest::BLUE], b, a, inf);
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TBlend::OpA(pout[TDest::ALPHA], a, inf);
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}
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pout+=4;
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pin+=step;
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}
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}
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break;
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case BLEND_MODULATE:
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for(i=0;i<count;i++)
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{
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a = TSrc::A(pin, tr, tg, tb);
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if (TBlend::ProcessAlpha0() || a)
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{
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r = (TSrc::R(pin)*inf->blendcolor[0])>>BLENDBITS;
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g = (TSrc::G(pin)*inf->blendcolor[1])>>BLENDBITS;
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b = (TSrc::B(pin)*inf->blendcolor[2])>>BLENDBITS;
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TBlend::OpC(pout[TDest::RED], r, a, inf);
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TBlend::OpC(pout[TDest::GREEN], g, a, inf);
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TBlend::OpC(pout[TDest::BLUE], b, a, inf);
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TBlend::OpA(pout[TDest::ALPHA], a, inf);
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}
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pout+=4;
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pin+=step;
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}
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break;
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case BLEND_OVERLAY:
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for(i=0;i<count;i++)
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{
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// color blend
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a = TSrc::A(pin, tr, tg, tb);
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if (TBlend::ProcessAlpha0() || a)
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{
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r = (TSrc::R(pin)*inf->blendcolor[3] + inf->blendcolor[0]) >> BLENDBITS;
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g = (TSrc::G(pin)*inf->blendcolor[3] + inf->blendcolor[1]) >> BLENDBITS;
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b = (TSrc::B(pin)*inf->blendcolor[3] + inf->blendcolor[2]) >> BLENDBITS;
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TBlend::OpC(pout[TDest::RED], r, a, inf);
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TBlend::OpC(pout[TDest::GREEN], g, a, inf);
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TBlend::OpC(pout[TDest::BLUE], b, a, inf);
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TBlend::OpA(pout[TDest::ALPHA], a, inf);
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}
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pout+=4;
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pin+=step;
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}
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break;
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}
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}
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typedef void (*CopyFunc)(uint8_t *pout, const uint8_t *pin, int count, int step, FCopyInfo *inf, uint8_t r, uint8_t g, uint8_t b);
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#define COPY_FUNCS(op) \
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{ \
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iCopyColors<cRGB, cBGRA, op>, \
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iCopyColors<cRGBT, cBGRA, op>, \
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iCopyColors<cRGBA, cBGRA, op>, \
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iCopyColors<cIA, cBGRA, op>, \
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iCopyColors<cCMYK, cBGRA, op>, \
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iCopyColors<cYCbCr, cBGRA, op>, \
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iCopyColors<cBGR, cBGRA, op>, \
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iCopyColors<cBGRA, cBGRA, op>, \
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iCopyColors<cI16, cBGRA, op>, \
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iCopyColors<cRGB555, cBGRA, op>, \
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iCopyColors<cPalEntry, cBGRA, op> \
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}
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static const CopyFunc copyfuncs[][11]={
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COPY_FUNCS(bCopy),
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COPY_FUNCS(bBlend),
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COPY_FUNCS(bAdd),
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COPY_FUNCS(bSubtract),
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COPY_FUNCS(bReverseSubtract),
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COPY_FUNCS(bModulate),
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COPY_FUNCS(bCopyAlpha),
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COPY_FUNCS(bCopyNewAlpha),
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COPY_FUNCS(bOverlay),
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COPY_FUNCS(bOverwrite)
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};
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#undef COPY_FUNCS
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//===========================================================================
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//
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// Clips the copy area for CopyPixelData functions
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//
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//===========================================================================
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bool ClipCopyPixelRect(const FClipRect *cr, int &originx, int &originy,
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const uint8_t *&patch, int &srcwidth, int &srcheight,
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int &pstep_x, int &pstep_y, int rotate)
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{
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int pixxoffset;
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int pixyoffset;
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int step_x;
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int step_y;
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assert(cr != NULL);
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// First adjust the settings for the intended rotation
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switch (rotate)
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{
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default:
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case 0: // normal
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pixxoffset = 0;
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pixyoffset = 0;
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step_x = pstep_x;
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step_y = pstep_y;
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break;
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case 1: // rotate 90<39> right
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pixxoffset = 0;
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pixyoffset = srcheight - 1;
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step_x = -pstep_y;
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step_y = pstep_x;
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break;
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case 2: // rotate 180<38>
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pixxoffset = srcwidth - 1;
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pixyoffset = srcheight - 1;
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step_x = -pstep_x;
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step_y = -pstep_y;
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break;
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case 3: // rotate 90<39> left
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pixxoffset = srcwidth - 1;
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pixyoffset = 0;
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step_x = pstep_y;
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step_y = -pstep_x;
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break;
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case 4: // flip horizontally
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pixxoffset = srcwidth - 1;
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pixyoffset = 0;
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step_x = -pstep_x;
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step_y = pstep_y;
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break;
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case 5: // flip horizontally and rotate 90<39> right
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pixxoffset = srcwidth - 1;
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pixyoffset = srcheight - 1;
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step_x = -pstep_y;
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step_y = -pstep_x;
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break;
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case 6: // flip vertically
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pixxoffset = 0;
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pixyoffset = srcheight - 1;
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step_x = pstep_x;
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step_y = -pstep_y;
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break;
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case 7: // flip horizontally and rotate 90<39> left
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pixxoffset = 0;
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pixyoffset = 0;
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step_x = pstep_y;
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step_y = pstep_x;
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break;
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}
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if (rotate&1)
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{
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int v = srcwidth;
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srcwidth = srcheight;
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srcheight = v;
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}
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patch += pixxoffset * pstep_x + pixyoffset * pstep_y;
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pstep_x = step_x;
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pstep_y = step_y;
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// clip source rectangle to destination
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if (originx < cr->x)
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{
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int skip = cr->x - originx;
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srcwidth -= skip;
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patch +=skip * step_x;
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originx = cr->x;
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if (srcwidth<=0) return false;
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}
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if (originx + srcwidth > cr->x + cr->width)
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{
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srcwidth = cr->x + cr->width - originx;
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if (srcwidth<=0) return false;
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}
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if (originy < cr->y)
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{
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int skip = cr->y - originy;
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srcheight -= skip;
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patch += skip*step_y;
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originy = cr->y;
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if (srcheight <= 0) return false;
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}
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if (originy + srcheight > cr->y + cr->height)
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{
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srcheight = cr->y + cr->height - originy;
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if (srcheight <= 0) return false;
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}
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return true;
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}
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//===========================================================================
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//
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//
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//
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//===========================================================================
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bool FClipRect::Intersect(int ix, int iy, int iw, int ih)
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{
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if (ix > x)
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{
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width -= (ix-x);
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x = ix;
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}
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else
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{
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iw -= (x-ix);
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}
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if (iy > y)
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{
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height -= (iy-y);
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y = iy;
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}
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else
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{
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ih -= (y-iy);
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}
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if (iw < width) width = iw;
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if (ih < height) height = ih;
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return width > 0 && height > 0;
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}
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//===========================================================================
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//
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// True Color texture copy function
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//
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//===========================================================================
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void FBitmap::CopyPixelDataRGB(int originx, int originy, const uint8_t *patch, int srcwidth,
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int srcheight, int step_x, int step_y, int rotate, int ct, FCopyInfo *inf,
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int r, int g, int b)
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{
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if (ClipCopyPixelRect(&ClipRect, originx, originy, patch, srcwidth, srcheight, step_x, step_y, rotate))
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{
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uint8_t *buffer = data + 4 * originx + Pitch * originy;
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int op = inf==NULL? OP_COPY : inf->op;
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for (int y=0;y<srcheight;y++)
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{
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copyfuncs[op][ct](&buffer[y*Pitch], &patch[y*step_y], srcwidth, step_x, inf, r, g, b);
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}
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}
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}
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template<class TDest, class TBlend>
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void iCopyPaletted(uint8_t *buffer, const uint8_t * patch, int srcwidth, int srcheight, int Pitch,
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int step_x, int step_y, int rotate, PalEntry * palette, FCopyInfo *inf)
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{
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int x,y,pos;
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for (y=0;y<srcheight;y++)
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{
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pos = y*Pitch;
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for (x=0;x<srcwidth;x++,pos+=4)
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{
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int v=(unsigned char)patch[y*step_y+x*step_x];
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int a = palette[v].a;
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if (TBlend::ProcessAlpha0() || a)
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{
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TBlend::OpC(buffer[pos + TDest::RED], palette[v].r, a, inf);
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TBlend::OpC(buffer[pos + TDest::GREEN], palette[v].g, a, inf);
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TBlend::OpC(buffer[pos + TDest::BLUE], palette[v].b, a, inf);
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TBlend::OpA(buffer[pos + TDest::ALPHA], a, inf);
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}
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}
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}
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}
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typedef void (*CopyPalettedFunc)(uint8_t *buffer, const uint8_t * patch, int srcwidth, int srcheight, int Pitch,
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int step_x, int step_y, int rotate, PalEntry * palette, FCopyInfo *inf);
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static const CopyPalettedFunc copypalettedfuncs[]=
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{
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iCopyPaletted<cBGRA, bCopy>,
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iCopyPaletted<cBGRA, bBlend>,
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iCopyPaletted<cBGRA, bAdd>,
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iCopyPaletted<cBGRA, bSubtract>,
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iCopyPaletted<cBGRA, bReverseSubtract>,
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iCopyPaletted<cBGRA, bModulate>,
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iCopyPaletted<cBGRA, bCopyAlpha>,
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iCopyPaletted<cBGRA, bCopyNewAlpha>,
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iCopyPaletted<cBGRA, bOverlay>,
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iCopyPaletted<cBGRA, bOverwrite>
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};
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//===========================================================================
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//
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// Paletted to True Color texture copy function
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//
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//===========================================================================
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void FBitmap::CopyPixelData(int originx, int originy, const uint8_t * patch, int srcwidth, int srcheight,
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int step_x, int step_y, int rotate, PalEntry * palette, FCopyInfo *inf)
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{
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if (ClipCopyPixelRect(&ClipRect, originx, originy, patch, srcwidth, srcheight, step_x, step_y, rotate))
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{
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uint8_t *buffer = data + 4*originx + Pitch*originy;
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PalEntry penew[256];
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memset(penew, 0, sizeof(penew));
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if (inf)
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{
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if (inf->blend)
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{
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iCopyColors<cPalEntry, cBGRA, bCopy>((uint8_t*)penew, (const uint8_t*)palette, 256, 4, inf, 0, 0, 0);
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palette = penew;
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}
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else if (inf->palette)
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{
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palette = inf->palette;
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}
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}
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copypalettedfuncs[inf==NULL? OP_COPY : inf->op](buffer, patch, srcwidth, srcheight, Pitch,
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step_x, step_y, rotate, palette, inf);
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}
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}
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//===========================================================================
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//
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// Clear buffer
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//
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//===========================================================================
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void FBitmap::Zero()
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{
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uint8_t *buffer = data;
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for (int y = ClipRect.y; y < ClipRect.height; ++y)
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{
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memset(buffer + ClipRect.x, 0, ClipRect.width*4);
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buffer += Pitch;
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}
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}
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