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 1.12 2006/08/01 12:23:39 bernie
20 *#* gfx_setClipRect(): Also define when CONFIG_GFX_VCOORDS is enabled; Extend documentation.
22 *#* Revision 1.11 2006/07/19 12:56:26 bernie
23 *#* Convert to new Doxygen style.
25 *#* Revision 1.10 2006/05/27 17:21:15 bernie
26 *#* Factor out, simplify and document clipping.
28 *#* Revision 1.9 2006/05/25 23:35:40 bernie
31 *#* Revision 1.8 2006/03/27 04:48:56 bernie
32 *#* gfx_blitImage(): New function; gfx_blitRaster(): Fix clipping bug.
34 *#* Revision 1.7 2006/03/07 22:18:04 bernie
35 *#* Correctly compute text width for prop fonts; Make styles a per-bitmap attribute.
37 *#* Revision 1.6 2006/02/23 11:17:16 bernie
38 *#* Documentation fixes.
40 *#* Revision 1.5 2006/02/15 09:10:15 bernie
41 *#* Implement prop fonts; Fix algo styles.
43 *#* Revision 1.4 2006/02/10 12:32:33 bernie
44 *#* Add multiple font support in bitmaps; gfx_blitRaster(): New function.
46 *#* Revision 1.3 2006/01/26 00:36:48 bernie
47 *#* Const correctness for some new functions.
49 *#* Revision 1.2 2006/01/24 21:55:43 aleph
50 *#* gfx_blit_P(): use RASTER_SIZE() to calculate raster size
52 *#* Revision 1.1 2006/01/24 02:17:49 bernie
53 *#* Split out gfx.c into bitmap.c and line.c.
60 #include <cfg/debug.h> /* ASSERT() */
61 #include <cfg/cpu.h> /* CPU_HARVARD */
62 #include <cfg/macros.h> /* MIN() */
63 #include <appconfig.h> /* CONFIG_GFX_CLIPPING */
65 #include <string.h> /* memset() */
68 #include <gfx/font.h> /* default_font */
73 * Initialize a Bitmap structure with the provided parameters.
75 * \note The pen position is reset to the origin.
77 void gfx_bitmapInit(Bitmap *bm, uint8_t *raster, coord_t w, coord_t h)
82 #if (CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB)
83 bm->stride = (w + 7) / 8;
84 #elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
87 #error Unknown value of CONFIG_BITMAP_FMT
88 #endif /* CONFIG_BITMAP_FMT */
93 gfx_setFont(bm, &default_font);
97 #if CONFIG_GFX_CLIPPING
102 #endif /* CONFIG_GFX_CLIPPING */
107 * Clear the whole bitmap surface to the background color.
109 * \note This function does \b not update the current pen position.
110 * \note This function bypasses the current clipping area.
112 void gfx_bitmapClear(Bitmap *bm)
114 memset(bm->raster, 0, RASTER_SIZE(bm->width, bm->height));
120 #include <avr/pgmspace.h> /* FIXME: memcpy_P() */
123 * Copy a raster picture located in program memory in the bitmap.
124 * The size of the raster to copy *must* be the same of the raster bitmap.
126 * \note This function does \b not update the current pen position
128 void gfx_blit_P(Bitmap *bm, const pgm_uint8_t *raster)
130 memcpy_P(bm->raster, raster, RASTER_SIZE(bm->width, bm->height));
132 #endif /* CPU_HARVARD */
134 #if CONFIG_GFX_CLIPPING
136 * Clip destination coordinates inside a clipping range.
138 * This macro helps a drawing operation to adjust its
139 * destination X and Y coordinates inside the destination
142 * The source start coordinate is adjusted as well
143 * when destination start clipping occurs.
145 #define gfx_clip(dmin, dmax, smin, cmin, cmax) \
147 if ((dmin) < (cmin)) \
149 (smin) += (cmin) - (dmin); \
152 (dmax) = MIN((dmax), (cmax)); \
155 #else /* !CONFIG_GFX_CLIPPING */
157 #define gfx_clip(dmin, dmax, smin, cmin, cmax) do { } while (0)
159 #endif /* !CONFIG_GFX_CLIPPING */
163 * Copy a rectangular area of a bitmap on another bitmap.
165 * Blitting is a common copy operation involving two bitmaps.
166 * A rectangular area of the source bitmap is copied bit-wise
167 * to a different position in the destination bitmap.
169 * \note Using the same bitmap for \a src and \a dst is unsupported.
171 * \param dst Bitmap where the operation writes.
172 * \param rect The (xmin;ymin) coordinates provide the top/left offset
173 * for drawing in the destination bitmap. If the source
174 * bitmap is larger than the rectangle, drawing is clipped.
175 * \param src Bitmap containing the source pixels.
176 * \param srcx Starting X offset in the source bitmap.
177 * \param srcy Starting Y offset in the source bitmap.
179 void gfx_blit(Bitmap *dst, const Rect *rect, const Bitmap *src, coord_t srcx, coord_t srcy)
181 coord_t dxmin, dymin, dxmax, dymax;
182 coord_t dx, dy, sx, sy;
185 * Pre-clip coordinates inside src->width/height.
189 dxmax = MIN(rect->xmax, rect->xmin + src->width);
190 dymax = MIN(rect->ymax, rect->ymin + src->height);
192 /* Perform regular clipping */
193 gfx_clip(dxmin, dxmax, srcx, dst->cr.xmin, dst->cr.xmax);
194 gfx_clip(dymin, dymax, srcy, dst->cr.ymin, dst->cr.ymax);
196 //kprintf("dxmin=%d, sxmin=%d, dxmax=%d; ", dxmin, sxmin, dxmax);
197 //kprintf("dymin=%d, symin=%d, dymax=%d\n", dymin, symin, dymax);
199 /* TODO: make it not as dog slow as this */
200 for (dx = dxmin, sx = srcx; dx < dxmax; ++dx, ++sx)
201 for (dy = dymin, sy = srcy; dy < dymax; ++dy, ++sy)
202 BM_DRAWPIXEL(dst, dx, dy, BM_READPIXEL(src, sx, sy));
206 * Blit a raster to a Bitmap.
208 * \todo Merge this function into gfx_blit()
212 void gfx_blitRaster(Bitmap *dst, coord_t dxmin, coord_t dymin,
213 const uint8_t *raster, coord_t w, coord_t h, coord_t stride)
215 coord_t dxmax = dxmin + w, dymax = dymin + h;
216 coord_t sxmin = 0, symin = 0;
217 coord_t dx, dy, sx, sy;
219 /* Perform regular clipping */
220 gfx_clip(dxmin, dxmax, sxmin, dst->cr.xmin, dst->cr.xmax);
221 gfx_clip(dymin, dymax, symin, dst->cr.ymin, dst->cr.ymax);
223 //kprintf("dxmin=%d, sxmin=%d, dxmax=%d; ", dxmin, sxmin, dxmax);
224 //kprintf("dymin=%d, symin=%d, dymax=%d\n", dymin, symin, dymax);
226 /* TODO: make it not as dog slow as this */
227 for (dx = dxmin, sx = sxmin; dx < dxmax; ++dx, ++sx)
228 for (dy = dymin, sy = symin; dy < dymax; ++dy, ++sy)
229 BM_DRAWPIXEL(dst, dx, dy, RAST_READPIXEL(raster, sx, sy, stride));
233 * Blit an Image to a Bitmap.
237 void gfx_blitImage(Bitmap *dst, coord_t dxmin, coord_t dymin, const Image *image)
241 gfx_blitRaster(dst, dxmin, dymin,
242 image->raster, image->width, image->height, image->stride);
246 #if CONFIG_GFX_CLIPPING || CONFIG_GFX_VCOORDS
249 * Set the bitmap clipping rectangle to the specified coordinates.
251 * All drawing performed on the bitmap will be clipped inside this
254 * The clipping rectangle is also used as a bounding box for the
255 * logical view of the virtual coordinate system.
257 * \note Following the convention used for all other operations, the
258 * top-left pixels of the rectangle are included, while the
259 * bottom-right pixels are considered outside the clipping region.
261 * \see gfx_setViewRect
263 void gfx_setClipRect(Bitmap *bm, coord_t minx, coord_t miny, coord_t maxx, coord_t maxy)
269 ASSERT(maxx <= bm->width);
270 ASSERT(maxy <= bm->height);
277 // kprintf("cr.xmin = %d, cr.ymin = %d, cr.xmax = %d, cr.ymax = %d\n",
278 // bm->cr.xMin, bm->cr.ymin, bm->cr.xmax, bm->cr.ymax);
281 #endif /* CONFIG_GFX_CLIPPING */