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patch by Andrej Spielmann (GSOC):

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* Added marco definitions for subpixel based blending of two 32 bit pixels.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26354 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus 2008-07-10 08:06:59 +00:00
parent 674c8bc8bb
commit 60d98a49ed
1 changed files with 76 additions and 4 deletions
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80
src/servers/app/drawing/Painter/drawing_modes/DrawingMode.h
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@ -1,6 +1,7 @@
/*
* Copyright 2005, Stephan Aßmus <superstippi@gmx.de>. All rights reserved.
* Distributed under the terms of the MIT License.
* Copyright 2005, Stephan Aßmus <superstippi@gmx.de>.
* Copyright 2008, Andrej Spielmann <andrej.spielmann@seh.ox.ac.uk>.
* All rights reserved. Distributed under the terms of the MIT License.
*
* Base class for different drawing modes.
*
@ -34,6 +35,16 @@ typedef PixelFormat::agg_buffer agg_buffer;
d[3] = 255; \
}
#define BLEND_SUBPIX(d, r, g, b, a1, a2, a3) \
{ \
pixel32 _p; \
_p.data32 = *(uint32*)d; \
d[0] = (((((b) - _p.data8[0]) * (a1)) + (_p.data8[0] << 8)) >> 8); \
d[1] = (((((g) - _p.data8[1]) * (a2)) + (_p.data8[1] << 8)) >> 8); \
d[2] = (((((r) - _p.data8[2]) * (a3)) + (_p.data8[2] << 8)) >> 8); \
d[3] = 255; \
}
// BLEND_FROM
//
// This macro assumes source alpha in range 0..255 and
@ -49,6 +60,14 @@ typedef PixelFormat::agg_buffer agg_buffer;
d[3] = 255; \
}
#define BLEND_FROM_SUBPIX(d, r1, g1, b1, r2, g2, b2, a1, a2, a3) \
{ \
d[0] = (((((b2) - (b1)) * (a1)) + ((b1) << 8)) >> 8); \
d[1] = (((((g2) - (g1)) * (a2)) + ((g1) << 8)) >> 8); \
d[2] = (((((r2) - (r1)) * (a3)) + ((r1) << 8)) >> 8); \
d[3] = 255; \
}
// BLEND16
//
// This macro assumes source alpha in range 0..65025 and
@ -65,7 +84,16 @@ typedef PixelFormat::agg_buffer agg_buffer;
d[3] = 255; \
}
// BLEND16_SUBPIX
#define BLEND16_SUBPIX(d, r, g, b, a1, a2, a3) \
{ \
pixel32 _p; \
_p.data32 = *(uint32*)d; \
d[0] = (((((b) - _p.data8[0]) * (a1)) + (_p.data8[0] << 16)) >> 16); \
d[1] = (((((g) - _p.data8[1]) * (a2)) + (_p.data8[1] << 16)) >> 16); \
d[2] = (((((r) - _p.data8[2]) * (a3)) + (_p.data8[2] << 16)) >> 16); \
d[3] = 255; \
}
// BLEND_COMPOSITE
//
@ -99,6 +127,43 @@ typedef PixelFormat::agg_buffer agg_buffer;
} \
}
// BLEND_COMPOSITE_SUBPIX
#define BLEND_COMPOSITE_SUBPIX(d, r, g, b, a1, a2, a3) \
{ \
pixel32 _p; \
_p.data32 = *(uint32*)d; \
if (_p.data8[3] == 255) { \
d[0] = (((((b) - _p.data8[0]) * (a1)) + (_p.data8[0] << 8)) >> 8); \
d[1] = (((((g) - _p.data8[1]) * (a2)) + (_p.data8[1] << 8)) >> 8); \
d[2] = (((((r) - _p.data8[2]) * (a3)) + (_p.data8[2] << 8)) >> 8); \
d[3] = 255; \
} else { \
if (_p.data8[3] == 0) { \
d[0] = (b); \
d[1] = (g); \
d[2] = (r); \
d[3] = (a1 + a2 + a3)/3; \
} else { \
uint8 alphaRest1 = 255 - (a1); \
uint8 alphaRest2 = 255 - (a2); \
uint8 alphaRest3 = 255 - (a3); \
uint32 alphaTemp1 = (65025 - alphaRest1 * (255 - _p.data8[3])); \
uint32 alphaTemp2 = (65025 - alphaRest2 * (255 - _p.data8[3])); \
uint32 alphaTemp3 = (65025 - alphaRest3 * (255 - _p.data8[3])); \
uint32 alphaDest1 = _p.data8[3] * alphaRest1; \
uint32 alphaDest2 = _p.data8[3] * alphaRest2; \
uint32 alphaDest3 = _p.data8[3] * alphaRest3; \
uint32 alphaSrc1 = 255 * (a1); \
uint32 alphaSrc2 = 255 * (a2); \
uint32 alphaSrc3 = 255 * (a3); \
d[0] = (_p.data8[0] * alphaDest1 + (b) * alphaSrc1) / alphaTemp1; \
d[1] = (_p.data8[1] * alphaDest2 + (g) * alphaSrc2) / alphaTemp2; \
d[2] = (_p.data8[2] * alphaDest3 + (r) * alphaSrc3) / alphaTemp3; \
d[3] = (alphaTemp1 + alphaTemp2 + alphaTemp3)/765; \
} \
} \
}
// BLEND_COMPOSITE16
//
// This macro assumes source alpha in range 0..65025 and
@ -110,6 +175,14 @@ typedef PixelFormat::agg_buffer agg_buffer;
BLEND_COMPOSITE(d, r, g, b, _a); \
}
// BLEND_COMPOSITE16_SUBPIX
#define BLEND_COMPOSITE16_SUBPIX(d, r, g, b, a1, a2, a3) \
{ \
uint16 _a1 = (a1) / 255; \
uint16 _a2 = (a2) / 255; \
uint16 _a3 = (a3) / 255; \
BLEND_COMPOSITE_SUBPIX(d, r, g, b, _a1, _a2, _a3); \
}
static inline
uint8
@ -121,6 +194,5 @@ brightness_for(uint8 red, uint8 green, uint8 blue)
return uint8((308 * red + 600 * green + 116 * blue) / 1024);
}
#endif // DRAWING_MODE_H