4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2003, 2004, 2005, 2006 Develer S.r.l. (http://www.develer.com/)
30 * Copyright 1999 Bernardo Innocenti <bernie@develer.com>
34 * \author Bernardo Innocenti <bernie@develer.com>
35 * \author Stefano Fedrigo <aleph@develer.com>
37 * \brief Bitmap manipulation routines.
43 #include <cfg/debug.h> /* ASSERT() */
44 #include <cpu/attr.h> /* CPU_HARVARD */
45 #include <cfg/macros.h> /* MIN() */
46 #include <appconfig.h> /* CONFIG_GFX_CLIPPING */
48 #include <string.h> /* memset() */
51 #include <gfx/font.h> /* default_font */
56 * Initialize a Bitmap structure with the provided parameters.
58 * \note The pen position is reset to the origin.
60 void gfx_bitmapInit(Bitmap *bm, uint8_t *raster, coord_t w, coord_t h)
65 #if (CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB)
66 bm->stride = (w + 7) / 8;
67 #elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
70 #error Unknown value of CONFIG_BITMAP_FMT
71 #endif /* CONFIG_BITMAP_FMT */
76 gfx_setFont(bm, &default_font);
80 #if CONFIG_GFX_CLIPPING
85 #endif /* CONFIG_GFX_CLIPPING */
90 * Clear the whole bitmap surface to the background color.
92 * \note This function does \b not update the current pen position.
93 * \note This function bypasses the current clipping area.
95 void gfx_bitmapClear(Bitmap *bm)
97 memset(bm->raster, 0, RAST_SIZE(bm->width, bm->height));
103 #include <avr/pgmspace.h> /* FIXME: memcpy_P() */
106 * Copy a raster picture located in program memory in the bitmap.
107 * The size of the raster to copy *must* be the same of the raster bitmap.
109 * \note This function does \b not update the current pen position
111 void gfx_blit_P(Bitmap *bm, const pgm_uint8_t *raster)
113 memcpy_P(bm->raster, raster, RAST_SIZE(bm->width, bm->height));
115 #endif /* CPU_HARVARD */
117 #if CONFIG_GFX_CLIPPING
119 * Clip destination coordinates inside a clipping range.
121 * This macro helps a drawing operation to adjust its
122 * destination X and Y coordinates inside the destination
125 * The source start coordinate is adjusted as well
126 * when destination start clipping occurs.
128 #define gfx_clip(dmin, dmax, smin, cmin, cmax) \
130 if ((dmin) < (cmin)) \
132 (smin) += (cmin) - (dmin); \
135 (dmax) = MIN((dmax), (cmax)); \
138 #else /* !CONFIG_GFX_CLIPPING */
140 #define gfx_clip(dmin, dmax, smin, cmin, cmax) do { } while (0)
142 #endif /* !CONFIG_GFX_CLIPPING */
146 * Copy a rectangular area of a bitmap on another bitmap.
148 * Blitting is a common copy operation involving two bitmaps.
149 * A rectangular area of the source bitmap is copied bit-wise
150 * to a different position in the destination bitmap.
152 * \note Using the same bitmap for \a src and \a dst is unsupported.
154 * \param dst Bitmap where the operation writes.
155 * \param rect The (xmin;ymin) coordinates provide the top/left offset
156 * for drawing in the destination bitmap. If the source
157 * bitmap is larger than the rectangle, drawing is clipped.
158 * \param src Bitmap containing the source pixels.
159 * \param srcx Starting X offset in the source bitmap.
160 * \param srcy Starting Y offset in the source bitmap.
162 void gfx_blit(Bitmap *dst, const Rect *rect, const Bitmap *src, coord_t srcx, coord_t srcy)
164 coord_t dxmin, dymin, dxmax, dymax;
165 coord_t dx, dy, sx, sy;
168 * Pre-clip coordinates inside src->width/height.
172 dxmax = MIN(rect->xmax, rect->xmin + src->width);
173 dymax = MIN(rect->ymax, rect->ymin + src->height);
175 /* Perform regular clipping */
176 gfx_clip(dxmin, dxmax, srcx, dst->cr.xmin, dst->cr.xmax);
177 gfx_clip(dymin, dymax, srcy, dst->cr.ymin, dst->cr.ymax);
179 //kprintf("dxmin=%d, sxmin=%d, dxmax=%d; ", dxmin, sxmin, dxmax);
180 //kprintf("dymin=%d, symin=%d, dymax=%d\n", dymin, symin, dymax);
182 /* TODO: make it not as dog slow as this */
183 for (dx = dxmin, sx = srcx; dx < dxmax; ++dx, ++sx)
184 for (dy = dymin, sy = srcy; dy < dymax; ++dy, ++sy)
185 BM_DRAWPIXEL(dst, dx, dy, BM_READPIXEL(src, sx, sy));
189 * Blit a raster to a Bitmap.
191 * \todo Merge this function into gfx_blit()
195 void gfx_blitRaster(Bitmap *dst, coord_t dxmin, coord_t dymin,
196 const uint8_t *raster, coord_t w, coord_t h, coord_t stride)
198 coord_t dxmax = dxmin + w, dymax = dymin + h;
199 coord_t sxmin = 0, symin = 0;
200 coord_t dx, dy, sx, sy;
202 /* Perform regular clipping */
203 gfx_clip(dxmin, dxmax, sxmin, dst->cr.xmin, dst->cr.xmax);
204 gfx_clip(dymin, dymax, symin, dst->cr.ymin, dst->cr.ymax);
206 //kprintf("dxmin=%d, sxmin=%d, dxmax=%d; ", dxmin, sxmin, dxmax);
207 //kprintf("dymin=%d, symin=%d, dymax=%d\n", dymin, symin, dymax);
209 /* TODO: make it not as dog slow as this */
210 for (dx = dxmin, sx = sxmin; dx < dxmax; ++dx, ++sx)
211 for (dy = dymin, sy = symin; dy < dymax; ++dy, ++sy)
212 BM_DRAWPIXEL(dst, dx, dy, RAST_READPIXEL(raster, sx, sy, stride));
216 * Blit an Image to a Bitmap.
220 void gfx_blitImage(Bitmap *dst, coord_t dxmin, coord_t dymin, const Image *image)
224 gfx_blitRaster(dst, dxmin, dymin,
225 image->raster, image->width, image->height, image->stride);
229 #if CONFIG_GFX_CLIPPING || CONFIG_GFX_VCOORDS
232 * Set the bitmap clipping rectangle to the specified coordinates.
234 * All drawing performed on the bitmap will be clipped inside this
237 * The clipping rectangle is also used as a bounding box for the
238 * logical view of the virtual coordinate system.
240 * \note Following the convention used for all other operations, the
241 * top-left pixels of the rectangle are included, while the
242 * bottom-right pixels are considered outside the clipping region.
244 * \see gfx_setViewRect
246 void gfx_setClipRect(Bitmap *bm, coord_t minx, coord_t miny, coord_t maxx, coord_t maxy)
252 ASSERT(maxx <= bm->width);
253 ASSERT(maxy <= bm->height);
260 // kprintf("cr.xmin = %d, cr.ymin = %d, cr.xmax = %d, cr.ymax = %d\n",
261 // bm->cr.xMin, bm->cr.ymin, bm->cr.xmax, bm->cr.ymax);
264 #endif /* CONFIG_GFX_CLIPPING */