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gzdoom-gles/src/textures/bitmap.h
Christoph Oelckers 9fcb85d3e9 - Fixed: All translucent blending operations for CopyColors must treat an 
alpha of 0 so that the pixel is not modified or texture composition as 
  intended will not work.


SVN r977 (trunk)
2008-05-17 08:18:31 +00:00

355 lines
11 KiB
C++
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/*
** bitmap.h
**
**---------------------------------------------------------------------------
** 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.
**---------------------------------------------------------------------------
**
**
*/
#ifndef __BITMAP_H__
#define __BITMAP_H__
#include "doomtype.h"
#include "templates.h"
struct FCopyInfo;
class FBitmap
{
protected:
BYTE *data;
int Width;
int Height;
int Pitch;
bool FreeBuffer;
public:
FBitmap()
{
data = NULL;
Width = Height = 0;
Pitch = 0;
FreeBuffer = false;
}
FBitmap(BYTE *buffer, int pitch, int width, int height)
{
data = buffer;
Pitch = pitch;
Width = width;
Height = height;
FreeBuffer = false;
}
virtual ~FBitmap()
{
Destroy();
}
void Destroy()
{
if (data != NULL && FreeBuffer) delete [] data;
data = NULL;
FreeBuffer = false;
}
bool Create (int w, int h)
{
Pitch = w*4;
Width = w;
Height = h;
data = new BYTE[4*w*h];
FreeBuffer = true;
return data != NULL;
}
int GetHeight() const
{
return Height;
}
int GetWidth() const
{
return Width;
}
int GetPitch() const
{
return Pitch;
}
const BYTE *GetPixels() const
{
return data;
}
BYTE *GetPixels()
{
return data;
}
virtual void CopyPixelDataRGB(int originx, int originy, const BYTE *patch, int srcwidth,
int srcheight, int step_x, int step_y, int rotate, int ct, FCopyInfo *inf = NULL);
virtual void CopyPixelData(int originx, int originy, const BYTE * patch, int srcwidth, int srcheight,
int step_x, int step_y, int rotate, PalEntry * palette, FCopyInfo *inf = NULL);
};
bool ClipCopyPixelRect(int texwidth, int texheight, int &originx, int &originy,
const BYTE *&patch, int &srcwidth, int &srcheight,
int &step_x, int &step_y, int rotate);
//===========================================================================
//
// True color conversion classes for the different pixel formats
// used by the supported texture formats
//
//===========================================================================
struct cRGB
{
static __forceinline unsigned char R(const unsigned char * p) { return p[0]; }
static __forceinline unsigned char G(const unsigned char * p) { return p[1]; }
static __forceinline unsigned char B(const unsigned char * p) { return p[2]; }
static __forceinline unsigned char A(const unsigned char * p) { return 255; }
static __forceinline int Gray(const unsigned char * p) { return (p[0]*77 + p[1]*143 + p[2]*36)>>8; }
};
struct cRGBA
{
enum
{
RED = 0,
GREEN = 1,
BLUE = 1,
ALPHA = 3
};
static __forceinline unsigned char R(const unsigned char * p) { return p[0]; }
static __forceinline unsigned char G(const unsigned char * p) { return p[1]; }
static __forceinline unsigned char B(const unsigned char * p) { return p[2]; }
static __forceinline unsigned char A(const unsigned char * p) { return p[3]; }
static __forceinline int Gray(const unsigned char * p) { return (p[0]*77 + p[1]*143 + p[2]*36)>>8; }
};
struct cIA
{
static __forceinline unsigned char R(const unsigned char * p) { return p[0]; }
static __forceinline unsigned char G(const unsigned char * p) { return p[0]; }
static __forceinline unsigned char B(const unsigned char * p) { return p[0]; }
static __forceinline unsigned char A(const unsigned char * p) { return p[1]; }
static __forceinline int Gray(const unsigned char * p) { return p[0]; }
};
struct cCMYK
{
static __forceinline unsigned char R(const unsigned char * p) { return p[3] - (((256-p[0])*p[3]) >> 8); }
static __forceinline unsigned char G(const unsigned char * p) { return p[3] - (((256-p[1])*p[3]) >> 8); }
static __forceinline unsigned char B(const unsigned char * p) { return p[3] - (((256-p[2])*p[3]) >> 8); }
static __forceinline unsigned char A(const unsigned char * p) { return 255; }
static __forceinline int Gray(const unsigned char * p) { return (R(p)*77 + G(p)*143 + B(p)*36)>>8; }
};
struct cBGR
{
static __forceinline unsigned char R(const unsigned char * p) { return p[2]; }
static __forceinline unsigned char G(const unsigned char * p) { return p[1]; }
static __forceinline unsigned char B(const unsigned char * p) { return p[0]; }
static __forceinline unsigned char A(const unsigned char * p) { return 255; }
static __forceinline int Gray(const unsigned char * p) { return (p[2]*77 + p[1]*143 + p[0]*36)>>8; }
};
struct cBGRA
{
enum
{
RED = 2,
GREEN = 1,
BLUE = 0,
ALPHA = 3
};
static __forceinline unsigned char R(const unsigned char * p) { return p[2]; }
static __forceinline unsigned char G(const unsigned char * p) { return p[1]; }
static __forceinline unsigned char B(const unsigned char * p) { return p[0]; }
static __forceinline unsigned char A(const unsigned char * p) { return p[3]; }
static __forceinline int Gray(const unsigned char * p) { return (p[2]*77 + p[1]*143 + p[0]*36)>>8; }
};
struct cARGB
{
enum
{
RED = 1,
GREEN = 2,
BLUE = 3,
ALPHA = 0
};
static __forceinline unsigned char R(const unsigned char * p) { return p[1]; }
static __forceinline unsigned char G(const unsigned char * p) { return p[2]; }
static __forceinline unsigned char B(const unsigned char * p) { return p[3]; }
static __forceinline unsigned char A(const unsigned char * p) { return p[0]; }
static __forceinline int Gray(const unsigned char * p) { return (p[1]*77 + p[2]*143 + p[3]*36)>>8; }
};
struct cI16
{
static __forceinline unsigned char R(const unsigned char * p) { return p[1]; }
static __forceinline unsigned char G(const unsigned char * p) { return p[1]; }
static __forceinline unsigned char B(const unsigned char * p) { return p[1]; }
static __forceinline unsigned char A(const unsigned char * p) { return 255; }
static __forceinline int Gray(const unsigned char * p) { return p[1]; }
};
struct cRGB555
{
static __forceinline unsigned char R(const unsigned char * p) { return (((*(WORD*)p)&0x1f)<<3); }
static __forceinline unsigned char G(const unsigned char * p) { return (((*(WORD*)p)&0x3e0)>>2); }
static __forceinline unsigned char B(const unsigned char * p) { return (((*(WORD*)p)&0x7c00)>>7); }
static __forceinline unsigned char A(const unsigned char * p) { return 255; }
static __forceinline int Gray(const unsigned char * p) { return (R(p)*77 + G(p)*143 + B(p)*36)>>8; }
};
struct cPalEntry
{
static __forceinline unsigned char R(const unsigned char * p) { return ((PalEntry*)p)->r; }
static __forceinline unsigned char G(const unsigned char * p) { return ((PalEntry*)p)->g; }
static __forceinline unsigned char B(const unsigned char * p) { return ((PalEntry*)p)->b; }
static __forceinline unsigned char A(const unsigned char * p) { return ((PalEntry*)p)->a; }
static __forceinline int Gray(const unsigned char * p) { return (R(p)*77 + G(p)*143 + B(p)*36)>>8; }
};
enum ColorType
{
CF_RGB,
CF_RGBA,
CF_IA,
CF_CMYK,
CF_BGR,
CF_BGRA,
CF_I16,
CF_RGB555,
CF_PalEntry
};
enum EBlend
{
BLEND_NONE = 0,
BLEND_INVERSEMAP = 1,
BLEND_GOLDMAP = 2,
BLEND_REDMAP = 3,
BLEND_GREENMAP = 4,
BLEND_ICEMAP = 5,
BLEND_DESATURATE1 = 6,
BLEND_DESATURATE31 = 36,
BLEND_MODULATE = -1,
BLEND_OVERLAY = -2,
};
enum ECopyOp
{
OP_COPY,
OP_BLEND,
OP_ADD,
OP_SUBTRACT,
OP_REVERSESUBTRACT,
OP_MODULATE,
OP_COPYALPHA,
OP_OVERWRITE
};
struct FCopyInfo
{
ECopyOp op;
EBlend blend;
fixed_t blendcolor[4];
fixed_t alpha;
fixed_t invalpha;
};
struct bCopy
{
static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = s; }
static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bOverwrite
{
static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = s; }
static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return true; }
};
struct bBlend
{
static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = (d*i->invalpha + s*i->alpha) >> FRACBITS; }
static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bAdd
{
static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = MIN<int>((d*FRACUNIT + s*i->alpha) >> FRACBITS, 255); }
static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bSubtract
{
static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = MAX<int>((d*FRACUNIT - s*i->alpha) >> FRACBITS, 0); }
static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bReverseSubtract
{
static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = MAX<int>((-d*FRACUNIT + s*i->alpha) >> FRACBITS, 0); }
static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bModulate
{
static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = (s*d)/255; }
static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bCopyAlpha
{
static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = (s*a + d*(255-a))/255; }
static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
#endif
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