1 /*
2 * Copyright 2005, Stephan Aßmus <superstippi@gmx.de>.
3 * Copyright 2008, Andrej Spielmann <andrej.spielmann@seh.ox.ac.uk>.
4 * All rights reserved. Distributed under the terms of the MIT License.
5 *
6 * DrawingMode implementing B_OP_OVER on B_RGBA32.
7 *
8 */
9
10 #ifndef DRAWING_MODE_OVER_SUBPIX_H
11 #define DRAWING_MODE_OVER_SUBPIX_H
12
13 #include "DrawingMode.h"
14 #include "GlobalSubpixelSettings.h"
15
16 // BLEND_OVER_SUBPIX
17 #define BLEND_OVER_SUBPIX(d, r, g, b, a1, a2, a3) \
18 { \
19 BLEND_SUBPIX(d, r, g, b, a1, a2, a3) \
20 }
21
22
23 // blend_solid_hspan_over_subpix
24 void
blend_solid_hspan_over_subpix(int x,int y,unsigned len,const color_type & c,const uint8 * covers,agg_buffer * buffer,const PatternHandler * pattern)25 blend_solid_hspan_over_subpix(int x, int y, unsigned len, const color_type& c,
26 const uint8* covers, agg_buffer* buffer, const PatternHandler* pattern)
27 {
28 uint8* p = buffer->row_ptr(y) + (x << 2);
29 rgb_color color = pattern->HighColor();
30 const int subpixelL = gSubpixelOrderingRGB ? 2 : 0;
31 const int subpixelM = 1;
32 const int subpixelR = gSubpixelOrderingRGB ? 0 : 2;
33 do {
34 if (pattern->IsHighColor(x, y)) {
35 BLEND_OVER_SUBPIX(p, color.red, color.green, color.blue,
36 covers[subpixelL], covers[subpixelM], covers[subpixelR]);
37 }
38 covers += 3;
39 p += 4;
40 x++;
41 len -= 3;
42 } while (len);
43 }
44
45 #endif // DRAWING_MODE_OVER_SUBPIX_H
46
47