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_ALPHA in "Pixel Overlay" mode on B_RGBA32. 7 * 8 */ 9 10 #ifndef DRAWING_MODE_ALPHA_PO_SOLID_SUBPIX_H 11 #define DRAWING_MODE_ALPHA_PO_SOLID_SUBPIX_H 12 13 #include "DrawingModeAlphaPOSUBPIX.h" 14 #include "GlobalSubpixelSettings.h" 15 16 // blend_solid_hspan_alpha_po_solid_subpix 17 void 18 blend_solid_hspan_alpha_po_solid_subpix(int x, int y, unsigned len, 19 const color_type& c, const uint8* covers, agg_buffer* buffer, 20 const PatternHandler* pattern) 21 { 22 uint8* p = buffer->row_ptr(y) + (x << 2); 23 uint16 alphaRed; 24 uint16 alphaGreen; 25 uint16 alphaBlue; 26 const int subpixelL = gSubpixelOrderingRGB ? 2 : 0; 27 const int subpixelM = 1; 28 const int subpixelR = gSubpixelOrderingRGB ? 0 : 2; 29 do { 30 alphaRed = c.a * covers[subpixelL]; 31 alphaGreen = c.a * covers[subpixelM]; 32 alphaBlue = c.a * covers[subpixelR]; 33 BLEND_ALPHA_PO_SUBPIX(p, c.r, c.g, c.b, 34 alphaBlue, alphaGreen, alphaRed); 35 covers += 3; 36 p += 4; 37 x++; 38 len -= 3; 39 } while (len); 40 } 41 42 #endif // DRAWING_MODE_ALPHA_PO_SOLID_SUBPIX_H 43 44