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>
12 * \author Stefano Fedrigo <aleph@develer.com>
14 * \brief Bitmap manipulation routines.
19 *#* Revision 1.7 2006/03/07 22:18:04 bernie
20 *#* Correctly compute text width for prop fonts; Make styles a per-bitmap attribute.
22 *#* Revision 1.6 2006/02/23 11:17:16 bernie
23 *#* Documentation fixes.
25 *#* Revision 1.5 2006/02/15 09:10:15 bernie
26 *#* Implement prop fonts; Fix algo styles.
28 *#* Revision 1.4 2006/02/10 12:32:33 bernie
29 *#* Add multiple font support in bitmaps; gfx_blitRaster(): New function.
31 *#* Revision 1.3 2006/01/26 00:36:48 bernie
32 *#* Const correctness for some new functions.
34 *#* Revision 1.2 2006/01/24 21:55:43 aleph
35 *#* gfx_blit_P(): use RASTER_SIZE() to calculate raster size
37 *#* Revision 1.1 2006/01/24 02:17:49 bernie
38 *#* Split out gfx.c into bitmap.c and line.c.
45 #include <cfg/debug.h> /* ASSERT() */
46 #include <cfg/cpu.h> /* CPU_HARVARD */
47 #include <cfg/macros.h> /* MIN() */
48 #include <appconfig.h> /* CONFIG_GFX_CLIPPING */
50 #include <string.h> /* memset() */
53 #include <gfx/font.h> /* default_font */
58 * Initialize a Bitmap structure with the provided parameters.
60 * \note The pen position is reset to the origin.
62 void gfx_bitmapInit(Bitmap *bm, uint8_t *raster, coord_t w, coord_t h)
67 #if (CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB)
68 bm->stride = (w + 7) / 8;
69 #elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
72 #error Unknown value of CONFIG_BITMAP_FMT
73 #endif /* CONFIG_BITMAP_FMT */
78 gfx_setFont(bm, &default_font);
82 #if CONFIG_GFX_CLIPPING
87 #endif /* CONFIG_GFX_CLIPPING */
92 * Clear the whole bitmap surface to the background color.
94 * \note This function does \b not update the current pen position.
96 void gfx_bitmapClear(Bitmap *bm)
98 memset(bm->raster, 0, RASTER_SIZE(bm->width, bm->height));
104 #include <avr/pgmspace.h> /* FIXME: memcpy_P() */
107 * Copy a raster picture located in program memory in the bitmap.
108 * The size of the raster to copy *must* be the same of the raster bitmap.
110 * \note This function does \b not update the current pen position
112 void gfx_blit_P(Bitmap *bm, const pgm_uint8_t *raster)
114 memcpy_P(bm->raster, raster, RASTER_SIZE(bm->width, bm->height));
116 #endif /* CPU_HARVARD */
119 * Copy a rectangular area of a bitmap on another bitmap.
121 * Blitting is a common copy operation involving two bitmaps.
122 * A rectangular area of the source bitmap is copied bit-wise
123 * to a different position in the destination bitmap.
125 * \note Using the same bitmap for \a src and \a dst is unsupported.
127 * \param dst Bitmap where the operation writes.
128 * \param rect The (xmin;ymin) coordinates provide the top/left offset
129 * for drawing in the destination bitmap. If the source
130 * bitmap is larger than the rectangle, drawing is clipped.
131 * \param src Bitmap containing the source pixels.
132 * \param srcx Starting X offset in the source bitmap.
133 * \param srcy Starting Y offset in the source bitmap.
135 void gfx_blit(Bitmap *dst, const Rect *rect, const Bitmap *src, coord_t srcx, coord_t srcy)
137 coord_t dxmin, dymin, dxmax, dymax;
138 coord_t dx, dy, sx, sy;
141 * Clip coordinates inside dst->cr and src->width/height.
144 if (dxmin < dst->cr.xmin)
146 srcx += dst->cr.xmin - dxmin;
147 dxmin = dst->cr.xmin;
150 if (dymin < dst->cr.ymin)
152 srcy += dst->cr.ymin - dymin;
153 dymin = dst->cr.ymin;
155 dxmax = MIN(MIN(rect->xmax, rect->xmin + src->width), dst->cr.xmax);
156 dymax = MIN(MIN(rect->ymax, rect->ymin + src->height), dst->cr.ymax);
158 /* TODO: make it not as dog slow as this */
159 for (dx = dxmin, sx = srcx; dx < dxmax; ++dx, ++sx)
160 for (dy = dymin, sy = srcy; dy < dymax; ++dy, ++sy)
161 BM_DRAWPIXEL(dst, dx, dy, BM_READPIXEL(src, sx, sy));
165 void gfx_blitRaster(Bitmap *dst, coord_t dxmin, coord_t dymin, const uint8_t *raster, coord_t w, coord_t h, coord_t stride)
167 coord_t dxmax, dymax;
168 coord_t sxmin = 0, symin = 0;
169 coord_t dx, dy, sx, sy;
172 * Clip coordinates inside dst->cr.
174 if (dxmin < dst->cr.xmin)
176 sxmin += dst->cr.xmin - dxmin;
177 dxmin = dst->cr.xmin;
179 if (dymin < dst->cr.ymin)
181 symin += dst->cr.ymin - dymin;
182 dymin = dst->cr.ymin;
184 dxmax = MIN(dxmin + w, dst->cr.xmax);
185 dymax = MIN(dymin + h, dst->cr.ymax);
187 /* TODO: make it not as dog slow as this */
188 for (dx = dxmin, sx = sxmin; dx < dxmax; ++dx, ++sx)
189 for (dy = dymin, sy = symin; dy < dymax; ++dy, ++sy)
190 BM_DRAWPIXEL(dst, dx, dy, RAST_READPIXEL(raster, sx, sy, stride));
195 * Set the bitmap clipping rectangle to the specified coordinates.
197 * All drawing performed on the bitmap will be clipped inside this
200 * \note Following the convention used in all other operations, the
201 * top-left pixels of the rectangle are included, while the
202 * bottom-right pixels are considered outside the clipping region.
204 void gfx_setClipRect(Bitmap *bm, coord_t minx, coord_t miny, coord_t maxx, coord_t maxy)
210 ASSERT(maxx <= bm->width);
211 ASSERT(maxy <= bm->height);
218 /* kprintf("cr.xmin = %d, cr.ymin = %d, cr.xmax = %d, cr.ymax = %d\n",
219 bm->cr.xMin, bm->cr.ymin, bm->cr.xmax, bm->cr.ymax);