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 1.6 2006/02/23 11:17:16 bernie
20 *#* Documentation fixes.
22 *#* Revision 1.5 2006/02/15 09:10:15 bernie
23 *#* Implement prop fonts; Fix algo styles.
25 *#* Revision 1.4 2006/02/10 12:32:33 bernie
26 *#* Add multiple font support in bitmaps; gfx_blitRaster(): New function.
28 *#* Revision 1.3 2006/01/26 00:36:48 bernie
29 *#* Const correctness for some new functions.
31 *#* Revision 1.2 2006/01/24 21:55:43 aleph
32 *#* gfx_blit_P(): use RASTER_SIZE() to calculate raster size
34 *#* Revision 1.1 2006/01/24 02:17:49 bernie
35 *#* Split out gfx.c into bitmap.c and line.c.
42 #include <cfg/debug.h> /* ASSERT() */
43 #include <cfg/cpu.h> /* CPU_HARVARD */
44 #include <cfg/macros.h> /* MIN() */
45 #include <appconfig.h> /* CONFIG_GFX_CLIPPING */
47 #include <string.h> /* memset() */
50 #include <gfx/font.h> /* default_font */
55 * Initialize a Bitmap structure with the provided parameters.
57 * \note The pen position is reset to the origin.
59 void gfx_bitmapInit(Bitmap *bm, uint8_t *raster, coord_t w, coord_t h)
64 #if (CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB)
65 bm->stride = (w + 7) / 8;
66 #elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
69 #error Unknown value of CONFIG_BITMAP_FMT
70 #endif /* CONFIG_BITMAP_FMT */
75 gfx_setFont(bm, &default_font);
78 #if CONFIG_GFX_CLIPPING
83 #endif /* CONFIG_GFX_CLIPPING */
88 * Clear the whole bitmap surface to the background color.
90 * \note This function does \b not update the current pen position.
92 void gfx_bitmapClear(Bitmap *bm)
94 memset(bm->raster, 0, RASTER_SIZE(bm->width, bm->height));
100 #include <avr/pgmspace.h> /* FIXME: memcpy_P() */
103 * Copy a raster picture located in program memory in the bitmap.
104 * The size of the raster to copy *must* be the same of the raster bitmap.
106 * \note This function does \b not update the current pen position
108 void gfx_blit_P(Bitmap *bm, const pgm_uint8_t *raster)
110 memcpy_P(bm->raster, raster, RASTER_SIZE(bm->width, bm->height));
112 #endif /* CPU_HARVARD */
115 * Copy a rectangular area of a bitmap on another bitmap.
117 * Blitting is a common copy operation involving two bitmaps.
118 * A rectangular area of the source bitmap is copied bit-wise
119 * to a different position in the destination bitmap.
121 * \note Using the same bitmap for \a src and \a dst is unsupported.
123 * \param dst Bitmap where the operation writes.
124 * \param rect The (xmin;ymin) coordinates provide the top/left offset
125 * for drawing in the destination bitmap. If the source
126 * bitmap is larger than the rectangle, drawing is clipped.
127 * \param src Bitmap containing the source pixels.
128 * \param srcx Starting X offset in the source bitmap.
129 * \param srcy Starting Y offset in the source bitmap.
131 void gfx_blit(Bitmap *dst, const Rect *rect, const Bitmap *src, coord_t srcx, coord_t srcy)
133 coord_t dxmin, dymin, dxmax, dymax;
134 coord_t dx, dy, sx, sy;
137 * Clip coordinates inside dst->cr and src->width/height.
140 if (dxmin < dst->cr.xmin)
142 srcx += dst->cr.xmin - dxmin;
143 dxmin = dst->cr.xmin;
146 if (dymin < dst->cr.ymin)
148 srcy += dst->cr.ymin - dymin;
149 dymin = dst->cr.ymin;
151 dxmax = MIN(MIN(rect->xmax, rect->xmin + src->width), dst->cr.xmax);
152 dymax = MIN(MIN(rect->ymax, rect->ymin + src->height), dst->cr.ymax);
154 /* TODO: make it not as dog slow as this */
155 for (dx = dxmin, sx = srcx; dx < dxmax; ++dx, ++sx)
156 for (dy = dymin, sy = srcy; dy < dymax; ++dy, ++sy)
157 BM_DRAWPIXEL(dst, dx, dy, BM_READPIXEL(src, sx, sy));
161 void gfx_blitRaster(Bitmap *dst, coord_t dxmin, coord_t dymin, const uint8_t *raster, coord_t w, coord_t h, coord_t stride)
163 coord_t dxmax, dymax;
164 coord_t sxmin = 0, symin = 0;
165 coord_t dx, dy, sx, sy;
168 * Clip coordinates inside dst->cr.
170 if (dxmin < dst->cr.xmin)
172 sxmin += dst->cr.xmin - dxmin;
173 dxmin = dst->cr.xmin;
175 if (dymin < dst->cr.ymin)
177 symin += dst->cr.ymin - dymin;
178 dymin = dst->cr.ymin;
180 dxmax = MIN(dxmin + w, dst->cr.xmax);
181 dymax = MIN(dymin + h, dst->cr.ymax);
183 /* TODO: make it not as dog slow as this */
184 for (dx = dxmin, sx = sxmin; dx < dxmax; ++dx, ++sx)
185 for (dy = dymin, sy = symin; dy < dymax; ++dy, ++sy)
186 BM_DRAWPIXEL(dst, dx, dy, RAST_READPIXEL(raster, sx, sy, stride));
191 * Set the bitmap clipping rectangle to the specified coordinates.
193 * All drawing performed on the bitmap will be clipped inside this
196 * \note Following the convention used in all other operations, the
197 * top-left pixels of the rectangle are included, while the
198 * bottom-right pixels are considered outside the clipping region.
200 void gfx_setClipRect(Bitmap *bm, coord_t minx, coord_t miny, coord_t maxx, coord_t maxy)
206 ASSERT(maxx <= bm->width);
207 ASSERT(maxy <= bm->height);
214 /* kprintf("cr.xmin = %d, cr.ymin = %d, cr.xmax = %d, cr.ymax = %d\n",
215 bm->cr.xMin, bm->cr.ymin, bm->cr.xmax, bm->cr.ymax);