140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2003, 2004, 2005, 2006 Develer S.r.l. (http://www.develer.com/)
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* Copyright 1999 Bernie Innocenti <bernie@codewiz.org>
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*
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* -->
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*
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*
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* \author Bernie Innocenti <bernie@codewiz.org>
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*
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* \brief Graphics private header.
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*/
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/*#*
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*#* $Log$
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*#* Revision 1.7 2006/07/19 12:56:26 bernie
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*#* Convert to new Doxygen style.
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*#*
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*#* Revision 1.6 2006/05/27 17:17:34 bernie
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*#* Optimize away divisions in RAST_ADDR/MASK macros.
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*#*
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*#* Revision 1.5 2006/05/25 23:35:40 bernie
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*#* Cleanup.
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*#*
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*#* Revision 1.4 2006/03/22 09:50:37 bernie
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*#* Use the same format for fonts and rasters.
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*#*
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*#* Revision 1.3 2006/02/15 09:10:15 bernie
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*#* Implement prop fonts; Fix algo styles.
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*#*
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*#* Revision 1.2 2006/02/10 12:28:33 bernie
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*#* Add font support in bitmaps; Make bitmap formats public.
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*#*
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*#* Revision 1.1 2006/01/26 00:32:49 bernie
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*#* Graphics private header.
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*#*
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*#*/
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#ifndef GFX_GFX_P_H
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#define GFX_GFX_P_H
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#include <gfx/gfx.h>
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#if CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB
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/* We use ucoord_t to let the compiler optimize away the division/modulo. */
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#define RAST_ADDR(raster, x, y, stride) \
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((raster) + (ucoord_t)(y) * (ucoord_t)(stride) + (ucoord_t)(x) / 8)
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#define RAST_MASK(raster, x, y) \
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(1 << (7 - (ucoord_t)(x) % 8))
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#elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
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/* We use ucoord_t to let the compiler optimize away the division/modulo. */
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#define RAST_ADDR(raster, x, y, stride) \
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((raster) + ((ucoord_t)(y) / 8) * (ucoord_t)(stride) + (ucoord_t)(x))
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#define RAST_MASK(raster, x, y) \
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(1 << ((ucoord_t)(y) % 8))
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#else
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#error Unknown value of CONFIG_BITMAP_FMT
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#endif /* CONFIG_BITMAP_FMT */
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#define BM_ADDR(bm, x, y) RAST_ADDR((bm)->raster, (x), (y), (bm)->stride)
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#define BM_MASK(bm, x, y) RAST_MASK((bm)->raster, (x), (y))
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/**
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* Plot a pixel in bitmap \a bm.
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*
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* \note bm is evaluated twice.
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* \see BM_CLEAR BM_DRAWPIXEL
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*/
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#define BM_PLOT(bm, x, y) \
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( *BM_ADDR(bm, x, y) |= BM_MASK(bm, x, y) )
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/**
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* Clear a pixel in bitmap \a bm.
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*
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* \note bm is evaluated twice.
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* \see BM_PLOT BM_DRAWPIXEL
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*/
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#define BM_CLEAR(bm, x, y) \
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( *BM_ADDR(bm, x, y) &= ~BM_MASK(bm, x, y) )
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/**
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* Set a pixel in bitmap \a bm to the specified color.
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*
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* \note bm is evaluated twice.
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* \note This macro is somewhat slower than BM_PLOT and BM_CLEAR.
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* \see BM_PLOT BM_CLEAR
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*/
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#define BM_DRAWPIXEL(bm, x, y, fg_pen) \
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do { \
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uint8_t *p = BM_ADDR(bm, x, y); \
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uint8_t mask = BM_MASK(bm, x, y); \
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*p = (*p & ~mask) | ((fg_pen) ? mask : 0); \
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} while (0)
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/**
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* Get the value of the pixel in bitmap \a bm.
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*
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* \return The returned value is either 0 or 1.
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*
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* \note bm is evaluated twice.
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* \see BM_DRAWPIXEL
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*/
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#define BM_READPIXEL(bm, x, y) \
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( *BM_ADDR(bm, x, y) & BM_MASK(bm, x, y) ? 1 : 0 )
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#define RAST_READPIXEL(raster, x, y, stride) \
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( *RAST_ADDR(raster, x, y, stride) & RAST_MASK(raster, x, y) ? 1 : 0 )
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#endif /* GFX_GFX_P_H */
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