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 1.10 2006/05/27 17:21:15 bernie
20 *#* Factor out, simplify and document clipping.
22 *#* Revision 1.9 2006/05/25 23:35:40 bernie
25 *#* Revision 1.8 2006/03/27 04:48:56 bernie
26 *#* gfx_blitImage(): New function; gfx_blitRaster(): Fix clipping bug.
28 *#* Revision 1.7 2006/03/07 22:18:04 bernie
29 *#* Correctly compute text width for prop fonts; Make styles a per-bitmap attribute.
31 *#* Revision 1.6 2006/02/23 11:17:16 bernie
32 *#* Documentation fixes.
34 *#* Revision 1.5 2006/02/15 09:10:15 bernie
35 *#* Implement prop fonts; Fix algo styles.
37 *#* Revision 1.4 2006/02/10 12:32:33 bernie
38 *#* Add multiple font support in bitmaps; gfx_blitRaster(): New function.
40 *#* Revision 1.3 2006/01/26 00:36:48 bernie
41 *#* Const correctness for some new functions.
43 *#* Revision 1.2 2006/01/24 21:55:43 aleph
44 *#* gfx_blit_P(): use RASTER_SIZE() to calculate raster size
46 *#* Revision 1.1 2006/01/24 02:17:49 bernie
47 *#* Split out gfx.c into bitmap.c and line.c.
54 #include <cfg/debug.h> /* ASSERT() */
55 #include <cfg/cpu.h> /* CPU_HARVARD */
56 #include <cfg/macros.h> /* MIN() */
57 #include <appconfig.h> /* CONFIG_GFX_CLIPPING */
59 #include <string.h> /* memset() */
62 #include <gfx/font.h> /* default_font */
67 * Initialize a Bitmap structure with the provided parameters.
69 * \note The pen position is reset to the origin.
71 void gfx_bitmapInit(Bitmap *bm, uint8_t *raster, coord_t w, coord_t h)
76 #if (CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB)
77 bm->stride = (w + 7) / 8;
78 #elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
81 #error Unknown value of CONFIG_BITMAP_FMT
82 #endif /* CONFIG_BITMAP_FMT */
87 gfx_setFont(bm, &default_font);
91 #if CONFIG_GFX_CLIPPING
96 #endif /* CONFIG_GFX_CLIPPING */
101 * Clear the whole bitmap surface to the background color.
103 * \note This function does \b not update the current pen position.
104 * \note This function bypasses the current clipping area.
106 void gfx_bitmapClear(Bitmap *bm)
108 memset(bm->raster, 0, RASTER_SIZE(bm->width, bm->height));
114 #include <avr/pgmspace.h> /* FIXME: memcpy_P() */
117 * Copy a raster picture located in program memory in the bitmap.
118 * The size of the raster to copy *must* be the same of the raster bitmap.
120 * \note This function does \b not update the current pen position
122 void gfx_blit_P(Bitmap *bm, const pgm_uint8_t *raster)
124 memcpy_P(bm->raster, raster, RASTER_SIZE(bm->width, bm->height));
126 #endif /* CPU_HARVARD */
128 #if CONFIG_GFX_CLIPPING
130 * Clip destination coordinates inside a clipping range.
132 * This macro helps a drawing operation to adjust its
133 * destination X and Y coordinates inside the destination
136 * The source start coordinate is adjusted as well
137 * when destination start clipping occurs.
139 #define gfx_clip(dmin, dmax, smin, cmin, cmax) \
141 if ((dmin) < (cmin)) \
143 (smin) += (cmin) - (dmin); \
146 (dmax) = MIN((dmax), (cmax)); \
149 #else /* !CONFIG_GFX_CLIPPING */
151 #define gfx_clip(dmin, dmax, smin, cmin, cmax) do { } while (0)
153 #endif /* !CONFIG_GFX_CLIPPING */
157 * Copy a rectangular area of a bitmap on another bitmap.
159 * Blitting is a common copy operation involving two bitmaps.
160 * A rectangular area of the source bitmap is copied bit-wise
161 * to a different position in the destination bitmap.
163 * \note Using the same bitmap for \a src and \a dst is unsupported.
165 * \param dst Bitmap where the operation writes.
166 * \param rect The (xmin;ymin) coordinates provide the top/left offset
167 * for drawing in the destination bitmap. If the source
168 * bitmap is larger than the rectangle, drawing is clipped.
169 * \param src Bitmap containing the source pixels.
170 * \param srcx Starting X offset in the source bitmap.
171 * \param srcy Starting Y offset in the source bitmap.
173 void gfx_blit(Bitmap *dst, const Rect *rect, const Bitmap *src, coord_t srcx, coord_t srcy)
175 coord_t dxmin, dymin, dxmax, dymax;
176 coord_t dx, dy, sx, sy;
179 * Pre-clip coordinates inside src->width/height.
183 dxmax = MIN(rect->xmax, rect->xmin + src->width);
184 dymax = MIN(rect->ymax, rect->ymin + src->height);
186 /* Perform regular clipping */
187 gfx_clip(dxmin, dxmax, srcx, dst->cr.xmin, dst->cr.xmax);
188 gfx_clip(dymin, dymax, srcy, dst->cr.ymin, dst->cr.ymax);
190 //kprintf("dxmin=%d, sxmin=%d, dxmax=%d; ", dxmin, sxmin, dxmax);
191 //kprintf("dymin=%d, symin=%d, dymax=%d\n", dymin, symin, dymax);
193 /* TODO: make it not as dog slow as this */
194 for (dx = dxmin, sx = srcx; dx < dxmax; ++dx, ++sx)
195 for (dy = dymin, sy = srcy; dy < dymax; ++dy, ++sy)
196 BM_DRAWPIXEL(dst, dx, dy, BM_READPIXEL(src, sx, sy));
200 * Blit a raster to a Bitmap.
202 * \todo Merge this function into gfx_blit()
206 void gfx_blitRaster(Bitmap *dst, coord_t dxmin, coord_t dymin,
207 const uint8_t *raster, coord_t w, coord_t h, coord_t stride)
209 coord_t dxmax = dxmin + w, dymax = dymin + h;
210 coord_t sxmin = 0, symin = 0;
211 coord_t dx, dy, sx, sy;
213 /* Perform regular clipping */
214 gfx_clip(dxmin, dxmax, sxmin, dst->cr.xmin, dst->cr.xmax);
215 gfx_clip(dymin, dymax, symin, dst->cr.ymin, dst->cr.ymax);
217 //kprintf("dxmin=%d, sxmin=%d, dxmax=%d; ", dxmin, sxmin, dxmax);
218 //kprintf("dymin=%d, symin=%d, dymax=%d\n", dymin, symin, dymax);
220 /* TODO: make it not as dog slow as this */
221 for (dx = dxmin, sx = sxmin; dx < dxmax; ++dx, ++sx)
222 for (dy = dymin, sy = symin; dy < dymax; ++dy, ++sy)
223 BM_DRAWPIXEL(dst, dx, dy, RAST_READPIXEL(raster, sx, sy, stride));
227 * Blit an Image to a Bitmap.
231 void gfx_blitImage(Bitmap *dst, coord_t dxmin, coord_t dymin, const Image *image)
235 gfx_blitRaster(dst, dxmin, dymin,
236 image->raster, image->width, image->height, image->stride);
240 #if CONFIG_GFX_CLIPPING
243 * Set the bitmap clipping rectangle to the specified coordinates.
245 * All drawing performed on the bitmap will be clipped inside this
248 * \note Following the convention used for all other operations, the
249 * top-left pixels of the rectangle are included, while the
250 * bottom-right pixels are considered outside the clipping region.
252 void gfx_setClipRect(Bitmap *bm, coord_t minx, coord_t miny, coord_t maxx, coord_t maxy)
258 ASSERT(maxx <= bm->width);
259 ASSERT(maxy <= bm->height);
266 // kprintf("cr.xmin = %d, cr.ymin = %d, cr.xmax = %d, cr.ymax = %d\n",
267 // bm->cr.xMin, bm->cr.ymin, bm->cr.xmax, bm->cr.ymax);
270 #endif /* CONFIG_GFX_CLIPPING */