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gzdoom-gles/src/textures/bitmap.h
Christoph Oelckers 7e169eb76f - split out the span generation from most texture classes 
Until now each subclass of FTexture had to implement the entire span generation itself, presumably so that a few classes can use simpler structures.
This does not work if a texture can have more than one pixel buffer as is needed for alpha textures.
Even though it means that some classes will allocate more data now, it's the only way to do it properly.
In addition this removes a significant amount of mostly redundant code from the texture classes.

- added alpha texture processing to all converted classes

As of now this is not active and not tested.
Note that as part of the conversion even those textures that were working as alphatextures will not look correct until the higher level code gets adjusted.
2018-03-18 12:36:14 +01:00

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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;
struct FClipRect
{
int x, y, width, height;
bool Intersect(int ix, int iy, int iw, int ih);
};
typedef int blend_t;
enum
{
BLENDBITS = 16,
BLENDUNIT = (1<<BLENDBITS)
};
class FBitmap
{
protected:
uint8_t *data;
int Width;
int Height;
int Pitch;
bool FreeBuffer;
FClipRect ClipRect;
public:
FBitmap()
{
data = NULL;
Width = Height = 0;
Pitch = 0;
FreeBuffer = false;
ClipRect.x = ClipRect.y = ClipRect.width = ClipRect.height = 0;
}
FBitmap(uint8_t *buffer, int pitch, int width, int height)
{
data = buffer;
Pitch = pitch;
Width = width;
Height = height;
FreeBuffer = false;
ClipRect.x = ClipRect.y = 0;
ClipRect.width = width;
ClipRect.height = height;
}
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 uint8_t[4*w*h];
memset(data, 0, 4*w*h);
FreeBuffer = true;
ClipRect.x = ClipRect.y = 0;
ClipRect.width = w;
ClipRect.height = h;
return data != NULL;
}
int GetHeight() const
{
return Height;
}
int GetWidth() const
{
return Width;
}
int GetPitch() const
{
return Pitch;
}
const uint8_t *GetPixels() const
{
return data;
}
uint8_t *GetPixels()
{
return data;
}
void SetClipRect(FClipRect &clip)
{
ClipRect = clip;
}
void IntersectClipRect(FClipRect &clip)
{
ClipRect.Intersect(clip.x, clip.y, clip.width, clip.height);
}
void IntersectClipRect(int cx, int cy, int cw, int ch)
{
ClipRect.Intersect(cx, cy, cw, ch);
}
const FClipRect &GetClipRect() const
{
return ClipRect;
}
void Zero();
virtual void CopyPixelDataRGB(int originx, int originy, const uint8_t *patch, int srcwidth,
int srcheight, int step_x, int step_y, int rotate, int ct, FCopyInfo *inf = NULL,
/* for PNG tRNS */ int r=0, int g=0, int b=0);
virtual void CopyPixelData(int originx, int originy, const uint8_t * patch, int srcwidth, int srcheight,
int step_x, int step_y, int rotate, PalEntry * palette, FCopyInfo *inf = NULL);
};
bool ClipCopyPixelRect(const FClipRect *cr, int &originx, int &originy,
const uint8_t *&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, uint8_t x, uint8_t y, uint8_t z) { return 255; }
static __forceinline int Gray(const unsigned char * p) { return (p[0]*77 + p[1]*143 + p[2]*36)>>8; }
};
struct cRGBT
{
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, uint8_t r, uint8_t g, uint8_t b) { return (p[0] != r || p[1] != g || p[2] != b) ? 255 : 0; }
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, uint8_t x, uint8_t y, uint8_t z) { 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, uint8_t x, uint8_t y, uint8_t z) { 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, uint8_t x, uint8_t y, uint8_t z) { return 255; }
static __forceinline int Gray(const unsigned char * p) { return (R(p)*77 + G(p)*143 + B(p)*36)>>8; }
};
struct cYCbCr
{
static __forceinline unsigned char R(const unsigned char * p) { return clamp((int)(p[0] + 1.40200 * (int(p[2]) - 0x80)), 0, 255); }
static __forceinline unsigned char G(const unsigned char * p) { return clamp((int)(p[0] - 0.34414 * (int(p[1] - 0x80)) - 0.71414 * (int(p[2]) - 0x80)), 0, 255); }
static __forceinline unsigned char B(const unsigned char * p) { return clamp((int)(p[0] + 1.77200 * (int(p[1]) - 0x80)), 0, 255); }
static __forceinline unsigned char A(const unsigned char * p, uint8_t x, uint8_t y, uint8_t z) { 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, uint8_t x, uint8_t y, uint8_t z) { 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, uint8_t x, uint8_t y, uint8_t z) { 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, uint8_t x, uint8_t y, uint8_t z) { 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, uint8_t x, uint8_t y, uint8_t z) { 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 (((*(uint16_t*)p)&0x1f)<<3); }
static __forceinline unsigned char G(const unsigned char * p) { return (((*(uint16_t*)p)&0x3e0)>>2); }
static __forceinline unsigned char B(const unsigned char * p) { return (((*(uint16_t*)p)&0x7c00)>>7); }
static __forceinline unsigned char A(const unsigned char * p, uint8_t x, uint8_t y, uint8_t z) { 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, uint8_t x, uint8_t y, uint8_t z) { 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_RGBT,
CF_RGBA,
CF_IA,
CF_CMYK,
CF_YCbCr,
CF_BGR,
CF_BGRA,
CF_I16,
CF_RGB555,
CF_PalEntry
};
enum EBlend
{
BLEND_NONE = 0,
BLEND_ICEMAP = 1,
BLEND_DESATURATE1 = 2,
BLEND_DESATURATE31 = 32,
BLEND_SPECIALCOLORMAP1 = 33,
BLEND_MODULATE = -1,
BLEND_OVERLAY = -2,
};
enum ECopyOp
{
OP_COPY,
OP_BLEND,
OP_ADD,
OP_SUBTRACT,
OP_REVERSESUBTRACT,
OP_MODULATE,
OP_COPYALPHA,
OP_COPYNEWALPHA,
OP_OVERLAY,
OP_OVERWRITE
};
struct FCopyInfo
{
ECopyOp op;
EBlend blend;
blend_t blendcolor[4];
blend_t alpha;
blend_t invalpha;
PalEntry *palette;
};
struct bOverwrite
{
static __forceinline void OpC(uint8_t &d, uint8_t s, uint8_t a, FCopyInfo *i) { d = s; }
static __forceinline void OpA(uint8_t &d, uint8_t s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return true; }
};
struct bCopy
{
static __forceinline void OpC(uint8_t &d, uint8_t s, uint8_t a, FCopyInfo *i) { d = s; }
static __forceinline void OpA(uint8_t &d, uint8_t s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bCopyNewAlpha
{
static __forceinline void OpC(uint8_t &d, uint8_t s, uint8_t a, FCopyInfo *i) { d = s; }
static __forceinline void OpA(uint8_t &d, uint8_t s, FCopyInfo *i) { d = (s*i->alpha) >> BLENDBITS; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bCopyAlpha
{
static __forceinline void OpC(uint8_t &d, uint8_t s, uint8_t a, FCopyInfo *i) { d = (s*a + d*(255-a))/255; }
static __forceinline void OpA(uint8_t &d, uint8_t s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bOverlay
{
static __forceinline void OpC(uint8_t &d, uint8_t s, uint8_t a, FCopyInfo *i) { d = (s*a + d*(255-a))/255; }
static __forceinline void OpA(uint8_t &d, uint8_t s, FCopyInfo *i) { d = MAX(s,d); }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bBlend
{
static __forceinline void OpC(uint8_t &d, uint8_t s, uint8_t a, FCopyInfo *i) { d = (d*i->invalpha + s*i->alpha) >> BLENDBITS; }
static __forceinline void OpA(uint8_t &d, uint8_t s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bAdd
{
static __forceinline void OpC(uint8_t &d, uint8_t s, uint8_t a, FCopyInfo *i) { d = MIN<int>((d*BLENDUNIT + s*i->alpha) >> BLENDBITS, 255); }
static __forceinline void OpA(uint8_t &d, uint8_t s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bSubtract
{
static __forceinline void OpC(uint8_t &d, uint8_t s, uint8_t a, FCopyInfo *i) { d = MAX<int>((d*BLENDUNIT - s*i->alpha) >> BLENDBITS, 0); }
static __forceinline void OpA(uint8_t &d, uint8_t s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bReverseSubtract
{
static __forceinline void OpC(uint8_t &d, uint8_t s, uint8_t a, FCopyInfo *i) { d = MAX<int>((-d*BLENDUNIT + s*i->alpha) >> BLENDBITS, 0); }
static __forceinline void OpA(uint8_t &d, uint8_t s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
struct bModulate
{
static __forceinline void OpC(uint8_t &d, uint8_t s, uint8_t a, FCopyInfo *i) { d = (s*d)/255; }
static __forceinline void OpA(uint8_t &d, uint8_t s, FCopyInfo *i) { d = s; }
static __forceinline bool ProcessAlpha0() { return false; }
};
#endif
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