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 1.8 2006/03/27 04:48:56 bernie
20 *#* gfx_blitImage(): New function; gfx_blitRaster(): Fix clipping bug.
22 *#* Revision 1.7 2006/03/07 22:18:04 bernie
23 *#* Correctly compute text width for prop fonts; Make styles a per-bitmap attribute.
25 *#* Revision 1.6 2006/02/23 11:17:16 bernie
26 *#* Documentation fixes.
28 *#* Revision 1.5 2006/02/15 09:10:15 bernie
29 *#* Implement prop fonts; Fix algo styles.
31 *#* Revision 1.4 2006/02/10 12:32:33 bernie
32 *#* Add multiple font support in bitmaps; gfx_blitRaster(): New function.
34 *#* Revision 1.3 2006/01/26 00:36:48 bernie
35 *#* Const correctness for some new functions.
37 *#* Revision 1.2 2006/01/24 21:55:43 aleph
38 *#* gfx_blit_P(): use RASTER_SIZE() to calculate raster size
40 *#* Revision 1.1 2006/01/24 02:17:49 bernie
41 *#* Split out gfx.c into bitmap.c and line.c.
48 #include <cfg/debug.h> /* ASSERT() */
49 #include <cfg/cpu.h> /* CPU_HARVARD */
50 #include <cfg/macros.h> /* MIN() */
51 #include <appconfig.h> /* CONFIG_GFX_CLIPPING */
53 #include <string.h> /* memset() */
56 #include <gfx/font.h> /* default_font */
61 * Initialize a Bitmap structure with the provided parameters.
63 * \note The pen position is reset to the origin.
65 void gfx_bitmapInit(Bitmap *bm, uint8_t *raster, coord_t w, coord_t h)
70 #if (CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB)
71 bm->stride = (w + 7) / 8;
72 #elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
75 #error Unknown value of CONFIG_BITMAP_FMT
76 #endif /* CONFIG_BITMAP_FMT */
81 gfx_setFont(bm, &default_font);
85 #if CONFIG_GFX_CLIPPING
90 #endif /* CONFIG_GFX_CLIPPING */
95 * Clear the whole bitmap surface to the background color.
97 * \note This function does \b not update the current pen position.
99 void gfx_bitmapClear(Bitmap *bm)
101 memset(bm->raster, 0, RASTER_SIZE(bm->width, bm->height));
107 #include <avr/pgmspace.h> /* FIXME: memcpy_P() */
110 * Copy a raster picture located in program memory in the bitmap.
111 * The size of the raster to copy *must* be the same of the raster bitmap.
113 * \note This function does \b not update the current pen position
115 void gfx_blit_P(Bitmap *bm, const pgm_uint8_t *raster)
117 memcpy_P(bm->raster, raster, RASTER_SIZE(bm->width, bm->height));
119 #endif /* CPU_HARVARD */
122 * Copy a rectangular area of a bitmap on another bitmap.
124 * Blitting is a common copy operation involving two bitmaps.
125 * A rectangular area of the source bitmap is copied bit-wise
126 * to a different position in the destination bitmap.
128 * \note Using the same bitmap for \a src and \a dst is unsupported.
130 * \param dst Bitmap where the operation writes.
131 * \param rect The (xmin;ymin) coordinates provide the top/left offset
132 * for drawing in the destination bitmap. If the source
133 * bitmap is larger than the rectangle, drawing is clipped.
134 * \param src Bitmap containing the source pixels.
135 * \param srcx Starting X offset in the source bitmap.
136 * \param srcy Starting Y offset in the source bitmap.
138 void gfx_blit(Bitmap *dst, const Rect *rect, const Bitmap *src, coord_t srcx, coord_t srcy)
140 coord_t dxmin, dymin, dxmax, dymax;
141 coord_t dx, dy, sx, sy;
144 * Clip coordinates inside dst->cr and src->width/height.
147 if (dxmin < dst->cr.xmin)
149 srcx += dst->cr.xmin - dxmin;
150 dxmin = dst->cr.xmin;
153 if (dymin < dst->cr.ymin)
155 srcy += dst->cr.ymin - dymin;
156 dymin = dst->cr.ymin;
158 dxmax = MIN(MIN(rect->xmax, rect->xmin + src->width), dst->cr.xmax);
159 dymax = MIN(MIN(rect->ymax, rect->ymin + src->height), dst->cr.ymax);
161 /* TODO: make it not as dog slow as this */
162 for (dx = dxmin, sx = srcx; dx < dxmax; ++dx, ++sx)
163 for (dy = dymin, sy = srcy; dy < dymax; ++dy, ++sy)
164 BM_DRAWPIXEL(dst, dx, dy, BM_READPIXEL(src, sx, sy));
169 * Blit a raster to a Bitmap.
173 void gfx_blitRaster(Bitmap *dst, coord_t dxmin, coord_t dymin,
174 const uint8_t *raster, coord_t w, coord_t h, coord_t stride)
176 coord_t dxmax = dxmin + w, dymax = dymin + h;
177 coord_t sxmin = 0, symin = 0;
178 coord_t dx, dy, sx, sy;
181 * Clip coordinates inside dst->cr.
183 if (dxmin < dst->cr.xmin)
185 sxmin += dst->cr.xmin - dxmin;
186 dxmin = dst->cr.xmin;
188 if (dymin < dst->cr.ymin)
190 symin += dst->cr.ymin - dymin;
191 dymin = dst->cr.ymin;
193 dxmax = MIN(dxmax, dst->cr.xmax);
194 dymax = MIN(dymax, 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 = sxmin; dx < dxmax; ++dx, ++sx)
201 for (dy = dymin, sy = symin; dy < dymax; ++dy, ++sy)
202 BM_DRAWPIXEL(dst, dx, dy, RAST_READPIXEL(raster, sx, sy, stride));
206 * Blit an Image to a Bitmap.
210 void gfx_blitImage(Bitmap *dst, coord_t dxmin, coord_t dymin, const Image *image)
214 gfx_blitRaster(dst, dxmin, dymin,
215 image->raster, image->width, image->height, image->stride);
220 * Set the bitmap clipping rectangle to the specified coordinates.
222 * All drawing performed on the bitmap will be clipped inside this
225 * \note Following the convention used in all other operations, the
226 * top-left pixels of the rectangle are included, while the
227 * bottom-right pixels are considered outside the clipping region.
229 void gfx_setClipRect(Bitmap *bm, coord_t minx, coord_t miny, coord_t maxx, coord_t maxy)
235 ASSERT(maxx <= bm->width);
236 ASSERT(maxy <= bm->height);
243 /* kprintf("cr.xmin = %d, cr.ymin = %d, cr.xmax = %d, cr.ymax = %d\n",
244 bm->cr.xMin, bm->cr.ymin, bm->cr.xmax, bm->cr.ymax);