73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/*
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* DIB driver primitives.
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*
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* Copyright 2011 Huw Davies
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "gdi_private.h"
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#include "dibdrv.h"
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static DWORD colorref_to_pixel_888(const dib_info *dib, COLORREF color)
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{
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return ( ((color >> 16) & 0xff) | (color & 0xff00) | ((color << 16) & 0xff0000) );
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}
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static inline DWORD put_field(DWORD field, int shift, int len)
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{
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shift = shift - (8 - len);
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if (len <= 8)
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field &= (((1 << len) - 1) << (8 - len));
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if (shift < 0)
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field >>= -shift;
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else
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field <<= shift;
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return field;
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}
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static DWORD colorref_to_pixel_masks(const dib_info *dib, COLORREF colour)
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{
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DWORD r,g,b;
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r = GetRValue(colour);
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g = GetGValue(colour);
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b = GetBValue(colour);
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return put_field(r, dib->red_shift, dib->red_len) |
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put_field(g, dib->green_shift, dib->green_len) |
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put_field(b, dib->blue_shift, dib->blue_len);
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}
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static DWORD colorref_to_pixel_null(const dib_info *dib, COLORREF color)
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{
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return 0;
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}
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const primitive_funcs funcs_8888 =
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{
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colorref_to_pixel_888
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};
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const primitive_funcs funcs_32 =
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{
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colorref_to_pixel_masks
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};
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const primitive_funcs funcs_null =
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{
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colorref_to_pixel_null
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};
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