4 * Copyright 2003, 2004, 2005, 2006 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 1999 Bernardo Innocenti <bernie@develer.com>
6 * This file is part of DevLib - See README.devlib for information.
11 * \author Bernardo Innocenti <bernie@develer.com>
13 * \brief Graphics private header.
18 *#* Revision 1.7 2006/07/19 12:56:26 bernie
19 *#* Convert to new Doxygen style.
21 *#* Revision 1.6 2006/05/27 17:17:34 bernie
22 *#* Optimize away divisions in RAST_ADDR/MASK macros.
24 *#* Revision 1.5 2006/05/25 23:35:40 bernie
27 *#* Revision 1.4 2006/03/22 09:50:37 bernie
28 *#* Use the same format for fonts and rasters.
30 *#* Revision 1.3 2006/02/15 09:10:15 bernie
31 *#* Implement prop fonts; Fix algo styles.
33 *#* Revision 1.2 2006/02/10 12:28:33 bernie
34 *#* Add font support in bitmaps; Make bitmap formats public.
36 *#* Revision 1.1 2006/01/26 00:32:49 bernie
37 *#* Graphics private header.
46 #if CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB
48 /* We use ucoord_t to let the compiler optimize away the division/modulo. */
49 #define RAST_ADDR(raster, x, y, stride) \
50 ((raster) + (ucoord_t)(y) * (ucoord_t)(stride) + (ucoord_t)(x) / 8)
51 #define RAST_MASK(raster, x, y) \
52 (1 << (7 - (ucoord_t)(x) % 8))
54 #elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
56 /* We use ucoord_t to let the compiler optimize away the division/modulo. */
57 #define RAST_ADDR(raster, x, y, stride) \
58 ((raster) + ((ucoord_t)(y) / 8) * (ucoord_t)(stride) + (ucoord_t)(x))
59 #define RAST_MASK(raster, x, y) \
60 (1 << ((ucoord_t)(y) % 8))
63 #error Unknown value of CONFIG_BITMAP_FMT
64 #endif /* CONFIG_BITMAP_FMT */
66 #define BM_ADDR(bm, x, y) RAST_ADDR((bm)->raster, (x), (y), (bm)->stride)
67 #define BM_MASK(bm, x, y) RAST_MASK((bm)->raster, (x), (y))
70 * Plot a pixel in bitmap \a bm.
72 * \note bm is evaluated twice.
73 * \see BM_CLEAR BM_DRAWPIXEL
75 #define BM_PLOT(bm, x, y) \
76 ( *BM_ADDR(bm, x, y) |= BM_MASK(bm, x, y) )
79 * Clear a pixel in bitmap \a bm.
81 * \note bm is evaluated twice.
82 * \see BM_PLOT BM_DRAWPIXEL
84 #define BM_CLEAR(bm, x, y) \
85 ( *BM_ADDR(bm, x, y) &= ~BM_MASK(bm, x, y) )
88 * Set a pixel in bitmap \a bm to the specified color.
90 * \note bm is evaluated twice.
91 * \note This macro is somewhat slower than BM_PLOT and BM_CLEAR.
92 * \see BM_PLOT BM_CLEAR
94 #define BM_DRAWPIXEL(bm, x, y, fg_pen) \
96 uint8_t *p = BM_ADDR(bm, x, y); \
97 uint8_t mask = BM_MASK(bm, x, y); \
98 *p = (*p & ~mask) | ((fg_pen) ? mask : 0); \
102 * Get the value of the pixel in bitmap \a bm.
104 * \return The returned value is either 0 or 1.
106 * \note bm is evaluated twice.
109 #define BM_READPIXEL(bm, x, y) \
110 ( *BM_ADDR(bm, x, y) & BM_MASK(bm, x, y) ? 1 : 0 )
112 #define RAST_READPIXEL(raster, x, y, stride) \
113 ( *RAST_ADDR(raster, x, y, stride) & RAST_MASK(raster, x, y) ? 1 : 0 )
115 #endif /* GFX_GFX_P_H */