raze-gles/source/common/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 <assert.h>
#include "bitmap.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(uint8_t *pout, const uint8_t *pin, int count, int step,
uint8_t tr, uint8_t tg, uint8_t tb)
{
int i;
int a;
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);
TBlend::OpC(pout[TDest::GREEN], TSrc::G(pin), a);
TBlend::OpC(pout[TDest::BLUE], TSrc::B(pin), a);
TBlend::OpA(pout[TDest::ALPHA], a);
}
pout+=4;
pin+=step;
}
}
typedef void (*CopyFunc)(uint8_t *pout, const uint8_t *pin, int count, int step, uint8_t r, uint8_t g, uint8_t b);
static const CopyFunc copyfuncs[]=
{
iCopyColors<cRGB, cBGRA, bCopy>,
iCopyColors<cRGBT, cBGRA, bCopy>,
iCopyColors<cRGBA, cBGRA, bCopy>,
iCopyColors<cIA, cBGRA, bCopy>,
iCopyColors<cCMYK, cBGRA, bCopy>,
iCopyColors<cYCbCr, cBGRA, bCopy>,
iCopyColors<cBGR, cBGRA, bCopy>,
iCopyColors<cBGRA, cBGRA, bCopy>,
iCopyColors<cI16, cBGRA, bCopy>,
iCopyColors<cRGB555, cBGRA, bCopy>,
iCopyColors<cPalEntry, cBGRA, bCopy>
};
//===========================================================================
//
// True Color texture copy function
//
//===========================================================================
void FBitmap::CopyPixelDataRGB(int originx, int originy, const uint8_t *patch, int srcwidth,
int srcheight, int step_x, int step_y, int rotate, int ct,
int r, int g, int b)
{
uint8_t *buffer = data + 4 * originx + Pitch * originy;
for (int y=0;y<srcheight;y++)
{
copyfuncs[ct](&buffer[y*Pitch], &patch[y*step_y], srcwidth, step_x, r, g, b);
}
}
template<class TDest, class TBlend>
void iCopyPaletted(uint8_t *buffer, const uint8_t * patch, int srcwidth, int srcheight, int Pitch,
int step_x, int step_y, int rotate, PalEntry * palette)
{
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);
TBlend::OpC(buffer[pos + TDest::GREEN], palette[v].g, a);
TBlend::OpC(buffer[pos + TDest::BLUE], palette[v].b, a);
TBlend::OpA(buffer[pos + TDest::ALPHA], a);
}
}
}
}
typedef void (*CopyPalettedFunc)(uint8_t *buffer, const uint8_t * patch, int srcwidth, int srcheight, int Pitch,
int step_x, int step_y, int rotate, PalEntry * palette);
//===========================================================================
//
// Paletted to True Color texture copy function
//
//===========================================================================
void FBitmap::CopyPixelData(int originx, int originy, const uint8_t * patch, int srcwidth, int srcheight,
int step_x, int step_y, int rotate, PalEntry * palette)
{
uint8_t *buffer = data + 4*originx + Pitch*originy;
iCopyPaletted<cBGRA, bCopy>(buffer, patch, srcwidth, srcheight, Pitch,
step_x, step_y, rotate, palette);
}