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_INVERT on B_RGBA32.
7 *
8 */
9
10#ifndef DRAWING_MODE_INVERT_SUBPIX_H
11#define DRAWING_MODE_INVERT_SUBPIX_H
12
13#include "DrawingMode.h"
14#include "GlobalSubpixelSettings.h"
15
16// BLEND_INVERT_SUBPIX
17#define BLEND_INVERT_SUBPIX(d, a1, a2, a3) \
18{ \
19	pixel32 _p; \
20	_p.data32 = *(uint32*)d; \
21	BLEND_SUBPIX(d, 255 - _p.data8[2], 255 - _p.data8[1], 255 - _p.data8[0], \
22					a1, a2, a3); \
23	(void)_p; \
24}
25
26
27// blend_solid_hspan_invert_subpix
28void
29blend_solid_hspan_invert_subpix(int x, int y, unsigned len, const color_type& c,
30	const uint8* covers, agg_buffer* buffer, const PatternHandler* pattern)
31{
32	uint8* p = buffer->row_ptr(y) + (x << 2);
33	const int subpixelL = gSubpixelOrderingRGB ? 2 : 0;
34	const int subpixelM = 1;
35	const int subpixelR = gSubpixelOrderingRGB ? 0 : 2;
36	do {
37		if (pattern->IsHighColor(x, y))	{
38			BLEND_INVERT_SUBPIX(p, covers[subpixelL], covers[subpixelM],
39				covers[subpixelR]);
40		}
41		covers += 3;
42		p += 4;
43		x++;
44		len -= 3;
45	} while (len);
46}
47
48
49#endif // DRAWING_MODE_INVERT_SUBPIX_H
50
51