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qzdoom-gpl/src/textures/bitmap.cpp

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/*
** bitmap.cpp
**
**---------------------------------------------------------------------------
** Copyright 2008 Christoph Oelckers
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
**
*/
#include "bitmap.h"
#include "templates.h"
#include "r_data/r_translate.h"
#include "v_palette.h"
#include "r_data/colormaps.h"
//===========================================================================
//
// multi-format pixel copy with colormap application
// requires the previously defined conversion classes to work
//
//===========================================================================
template<class TSrc, class TDest, class TBlend>
void iCopyColors(BYTE *pout, const BYTE *pin, int count, int step, FCopyInfo *inf,
BYTE tr, BYTE tg, BYTE tb)
{
int i;
int fac;
BYTE r,g,b;
int gray;
int a;
switch(inf? inf->blend : BLEND_NONE)
{
case BLEND_NONE:
for(i=0;i<count;i++)
{
a = TSrc::A(pin, tr, tg, tb);
if (TBlend::ProcessAlpha0() || a)
{
TBlend::OpC(pout[TDest::RED], TSrc::R(pin), a, inf);
TBlend::OpC(pout[TDest::GREEN], TSrc::G(pin), a, inf);
TBlend::OpC(pout[TDest::BLUE], TSrc::B(pin), a, inf);
TBlend::OpA(pout[TDest::ALPHA], a, inf);
}
pout+=4;
pin+=step;
}
break;
case BLEND_ICEMAP:
// Create the ice translation table, based on Hexen's.
// Since this is done in True Color the purplish tint is fully preserved - even in Doom!
for(i=0;i<count;i++)
{
a = TSrc::A(pin, tr, tg, tb);
if (TBlend::ProcessAlpha0() || a)
{
int gray = TSrc::Gray(pin)>>4;
TBlend::OpC(pout[TDest::RED], IcePalette[gray][0], a, inf);
TBlend::OpC(pout[TDest::GREEN], IcePalette[gray][1], a, inf);
TBlend::OpC(pout[TDest::BLUE], IcePalette[gray][2], a, inf);
TBlend::OpA(pout[TDest::ALPHA], a, inf);
}
pout+=4;
pin+=step;
}
break;
default:
if (inf->blend >= BLEND_SPECIALCOLORMAP1)
{
FSpecialColormap *cm = &SpecialColormaps[inf->blend - BLEND_SPECIALCOLORMAP1];
for(i=0;i<count;i++)
{
a = TSrc::A(pin, tr, tg, tb);
if (TBlend::ProcessAlpha0() || a)
{
gray = clamp<int>(TSrc::Gray(pin),0,255);
PalEntry pe = cm->GrayscaleToColor[gray];
TBlend::OpC(pout[TDest::RED], pe.r , a, inf);
TBlend::OpC(pout[TDest::GREEN], pe.g, a, inf);
TBlend::OpC(pout[TDest::BLUE], pe.b, a, inf);
TBlend::OpA(pout[TDest::ALPHA], a, inf);
}
pout+=4;
pin+=step;
}
}
else if (inf->blend >= BLEND_DESATURATE1 && inf->blend<=BLEND_DESATURATE31)
{
// Desaturated light settings.
fac=inf->blend-BLEND_DESATURATE1+1;
for(i=0;i<count;i++)
{
a = TSrc::A(pin, tr, tg, tb);
if (TBlend::ProcessAlpha0() || a)
{
gray = TSrc::Gray(pin);
r = (TSrc::R(pin)*(31-fac) + gray*fac)/31;
g = (TSrc::G(pin)*(31-fac) + gray*fac)/31;
b = (TSrc::B(pin)*(31-fac) + gray*fac)/31;
TBlend::OpC(pout[TDest::RED], r, a, inf);
TBlend::OpC(pout[TDest::GREEN], g, a, inf);
TBlend::OpC(pout[TDest::BLUE], b, a, inf);
TBlend::OpA(pout[TDest::ALPHA], a, inf);
}
pout+=4;
pin+=step;
}
}
break;
case BLEND_MODULATE:
for(i=0;i<count;i++)
{
a = TSrc::A(pin, tr, tg, tb);
if (TBlend::ProcessAlpha0() || a)
{
r = (TSrc::R(pin)*inf->blendcolor[0])>>FRACBITS;
g = (TSrc::G(pin)*inf->blendcolor[1])>>FRACBITS;
b = (TSrc::B(pin)*inf->blendcolor[2])>>FRACBITS;
TBlend::OpC(pout[TDest::RED], r, a, inf);
TBlend::OpC(pout[TDest::GREEN], g, a, inf);
TBlend::OpC(pout[TDest::BLUE], b, a, inf);
TBlend::OpA(pout[TDest::ALPHA], a, inf);
}
pout+=4;
pin+=step;
}
break;
case BLEND_OVERLAY:
for(i=0;i<count;i++)
{
// color blend
a = TSrc::A(pin, tr, tg, tb);
if (TBlend::ProcessAlpha0() || a)
{
r = (TSrc::R(pin)*inf->blendcolor[3] + inf->blendcolor[0]) >> FRACBITS;
g = (TSrc::G(pin)*inf->blendcolor[3] + inf->blendcolor[1]) >> FRACBITS;
b = (TSrc::B(pin)*inf->blendcolor[3] + inf->blendcolor[2]) >> FRACBITS;
TBlend::OpC(pout[TDest::RED], r, a, inf);
TBlend::OpC(pout[TDest::GREEN], g, a, inf);
TBlend::OpC(pout[TDest::BLUE], b, a, inf);
TBlend::OpA(pout[TDest::ALPHA], a, inf);
}
pout+=4;
pin+=step;
}
break;
}
}
typedef void (*CopyFunc)(BYTE *pout, const BYTE *pin, int count, int step, FCopyInfo *inf, BYTE r, BYTE g, BYTE b);
#define COPY_FUNCS(op) \
{ \
iCopyColors<cRGB, cBGRA, op>, \
iCopyColors<cRGBT, cBGRA, op>, \
iCopyColors<cRGBA, cBGRA, op>, \
iCopyColors<cIA, cBGRA, op>, \
iCopyColors<cCMYK, cBGRA, op>, \
iCopyColors<cBGR, cBGRA, op>, \
iCopyColors<cBGRA, cBGRA, op>, \
iCopyColors<cI16, cBGRA, op>, \
iCopyColors<cRGB555, cBGRA, op>, \
iCopyColors<cPalEntry, cBGRA, op> \
}
static const CopyFunc copyfuncs[][10]={
COPY_FUNCS(bCopy),
COPY_FUNCS(bBlend),
COPY_FUNCS(bAdd),
COPY_FUNCS(bSubtract),
COPY_FUNCS(bReverseSubtract),
COPY_FUNCS(bModulate),
COPY_FUNCS(bCopyAlpha),
COPY_FUNCS(bCopyNewAlpha),
COPY_FUNCS(bOverlay),
COPY_FUNCS(bOverwrite)
};
#undef COPY_FUNCS
//===========================================================================
//
// Clips the copy area for CopyPixelData functions
//
//===========================================================================
bool ClipCopyPixelRect(const FClipRect *cr, int &originx, int &originy,
const BYTE *&patch, int &srcwidth, int &srcheight,
int &pstep_x, int &pstep_y, int rotate)
{
int pixxoffset;
int pixyoffset;
int step_x;
int step_y;
assert(cr != NULL);
// First adjust the settings for the intended rotation
switch (rotate)
{
default:
case 0: // normal
pixxoffset = 0;
pixyoffset = 0;
step_x = pstep_x;
step_y = pstep_y;
break;
case 1: // rotate 90<39> right
pixxoffset = 0;
pixyoffset = srcheight - 1;
step_x = -pstep_y;
step_y = pstep_x;
break;
case 2: // rotate 180<38>
pixxoffset = srcwidth - 1;
pixyoffset = srcheight - 1;
step_x = -pstep_x;
step_y = -pstep_y;
break;
case 3: // rotate 90<39> left
pixxoffset = srcwidth - 1;
pixyoffset = 0;
step_x = pstep_y;
step_y = -pstep_x;
break;
case 4: // flip horizontally
pixxoffset = srcwidth - 1;
pixyoffset = 0;
step_x = -pstep_x;
step_y = pstep_y;
break;
case 5: // flip horizontally and rotate 90<39> right
pixxoffset = srcwidth - 1;
pixyoffset = srcheight - 1;
step_x = -pstep_y;
step_y = -pstep_x;
break;
case 6: // flip vertically
pixxoffset = 0;
pixyoffset = srcheight - 1;
step_x = pstep_x;
step_y = -pstep_y;
break;
case 7: // flip horizontally and rotate 90<39> left
pixxoffset = 0;
pixyoffset = 0;
step_x = pstep_y;
step_y = pstep_x;
break;
}
if (rotate&1)
{
int v = srcwidth;
srcwidth = srcheight;
srcheight = v;
}
patch += pixxoffset * pstep_x + pixyoffset * pstep_y;
pstep_x = step_x;
pstep_y = step_y;
// clip source rectangle to destination
if (originx < cr->x)
{
int skip = cr->x - originx;
srcwidth -= skip;
patch +=skip * step_x;
originx = cr->x;
if (srcwidth<=0) return false;
}
if (originx + srcwidth > cr->x + cr->width)
{
srcwidth = cr->x + cr->width - originx;
if (srcwidth<=0) return false;
}
if (originy < cr->y)
{
int skip = cr->y - originy;
srcheight -= skip;
patch += skip*step_y;
originy = cr->y;
if (srcheight <= 0) return false;
}
if (originy + srcheight > cr->y + cr->height)
{
srcheight = cr->y + cr->height - originy;
if (srcheight <= 0) return false;
}
return true;
}
//===========================================================================
//
//
//
//===========================================================================
bool FClipRect::Intersect(int ix, int iy, int iw, int ih)
{
if (ix > x)
{
width -= (ix-x);
x = ix;
}
else
{
iw -= (x-ix);
}
if (iy > y)
{
height -= (iy-y);
y = iy;
}
else
{
ih -= (y-iy);
}
if (iw < width) width = iw;
if (ih < height) height = ih;
return width > 0 && height > 0;
}
//===========================================================================
//
// True Color texture copy function
//
//===========================================================================
void FBitmap::CopyPixelDataRGB(int originx, int originy, const BYTE *patch, int srcwidth,
int srcheight, int step_x, int step_y, int rotate, int ct, FCopyInfo *inf,
int r, int g, int b)
{
if (ClipCopyPixelRect(&ClipRect, originx, originy, patch, srcwidth, srcheight, step_x, step_y, rotate))
{
BYTE *buffer = data + 4 * originx + Pitch * originy;
int op = inf==NULL? OP_COPY : inf->op;
for (int y=0;y<srcheight;y++)
{
copyfuncs[op][ct](&buffer[y*Pitch], &patch[y*step_y], srcwidth, step_x, inf, r, g, b);
}
}
}
template<class TDest, class TBlend>
void iCopyPaletted(BYTE *buffer, const BYTE * patch, int srcwidth, int srcheight, int Pitch,
int step_x, int step_y, int rotate, PalEntry * palette, FCopyInfo *inf)
{
int x,y,pos;
for (y=0;y<srcheight;y++)
{
pos = y*Pitch;
for (x=0;x<srcwidth;x++,pos+=4)
{
int v=(unsigned char)patch[y*step_y+x*step_x];
int a = palette[v].a;
if (TBlend::ProcessAlpha0() || a)
{
TBlend::OpC(buffer[pos + TDest::RED], palette[v].r, a, inf);
TBlend::OpC(buffer[pos + TDest::GREEN], palette[v].g, a, inf);
TBlend::OpC(buffer[pos + TDest::BLUE], palette[v].b, a, inf);
TBlend::OpA(buffer[pos + TDest::ALPHA], a, inf);
}
}
}
}
typedef void (*CopyPalettedFunc)(BYTE *buffer, const BYTE * patch, int srcwidth, int srcheight, int Pitch,
int step_x, int step_y, int rotate, PalEntry * palette, FCopyInfo *inf);
static const CopyPalettedFunc copypalettedfuncs[]=
{
iCopyPaletted<cBGRA, bCopy>,
iCopyPaletted<cBGRA, bBlend>,
iCopyPaletted<cBGRA, bAdd>,
iCopyPaletted<cBGRA, bSubtract>,
iCopyPaletted<cBGRA, bReverseSubtract>,
iCopyPaletted<cBGRA, bModulate>,
iCopyPaletted<cBGRA, bCopyAlpha>,
iCopyPaletted<cBGRA, bCopyNewAlpha>,
iCopyPaletted<cBGRA, bOverlay>,
iCopyPaletted<cBGRA, bOverwrite>
};
//===========================================================================
//
// Paletted to True Color texture copy function
//
//===========================================================================
void FBitmap::CopyPixelData(int originx, int originy, const BYTE * patch, int srcwidth, int srcheight,
int step_x, int step_y, int rotate, PalEntry * palette, FCopyInfo *inf)
{
if (ClipCopyPixelRect(&ClipRect, originx, originy, patch, srcwidth, srcheight, step_x, step_y, rotate))
{
BYTE *buffer = data + 4*originx + Pitch*originy;
PalEntry penew[256];
memset(penew, 0, sizeof(penew));
if (inf && inf->blend)
{
iCopyColors<cPalEntry, cBGRA, bCopy>((BYTE*)penew, (const BYTE*)palette, 256, 4, inf, 0, 0, 0);
palette = penew;
}
copypalettedfuncs[inf==NULL? OP_COPY : inf->op](buffer, patch, srcwidth, srcheight, Pitch,
step_x, step_y, rotate, palette, inf);
}
}
//===========================================================================
//
// Clear buffer
//
//===========================================================================
void FBitmap::Zero()
{
BYTE *buffer = data;
for (int y = ClipRect.y; y < ClipRect.height; ++y)
{
memset(buffer + ClipRect.x, 0, ClipRect.width*4);
buffer += Pitch;
}
}
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