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
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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/cfg_gfx.h" /* CONFIG_GFX_CLIPPING */
44 #include <cfg/macros.h> /* MIN() */
45 #include <cfg/debug.h> /* ASSERT() */
47 #include <cpu/attr.h> /* CPU_HARVARD */
49 #include <string.h> /* memset() */
52 #include <gfx/font.h> /* default_font */
57 * Initialize a Bitmap structure with the provided parameters.
59 * \note The pen position is reset to the origin.
61 void gfx_bitmapInit(Bitmap *bm, uint8_t *raster, coord_t w, coord_t h)
66 #if (CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB)
67 bm->stride = (w + 7) / 8;
68 #elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
71 #error Unknown value of CONFIG_BITMAP_FMT
72 #endif /* CONFIG_BITMAP_FMT */
77 gfx_setFont(bm, &default_font);
81 #if CONFIG_GFX_CLIPPING
86 #endif /* CONFIG_GFX_CLIPPING */
91 * Clear the whole bitmap surface to the background color.
93 * \note This function does \b not update the current pen position.
94 * \note This function bypasses the current clipping area.
96 void gfx_bitmapClear(Bitmap *bm)
98 memset(bm->raster, 0, RAST_SIZE(bm->width, bm->height));
104 #include <avr/pgmspace.h> /* FIXME: memcpy_P() */
107 * Copy a raster picture located in program memory in the bitmap.
108 * The size of the raster to copy *must* be the same of the raster bitmap.
110 * \note This function does \b not update the current pen position
112 void gfx_blit_P(Bitmap *bm, const pgm_uint8_t *raster)
114 memcpy_P(bm->raster, raster, RAST_SIZE(bm->width, bm->height));
116 #endif /* CPU_HARVARD */
118 #if CONFIG_GFX_CLIPPING
120 * Clip destination coordinates inside a clipping range.
122 * This macro helps a drawing operation to adjust its
123 * destination X and Y coordinates inside the destination
126 * The source start coordinate is adjusted as well
127 * when destination start clipping occurs.
129 #define gfx_clip(dmin, dmax, smin, cmin, cmax) \
131 if ((dmin) < (cmin)) \
133 (smin) += (cmin) - (dmin); \
136 (dmax) = MIN((dmax), (cmax)); \
139 #else /* !CONFIG_GFX_CLIPPING */
141 #define gfx_clip(dmin, dmax, smin, cmin, cmax) do { } while (0)
143 #endif /* !CONFIG_GFX_CLIPPING */
147 * Copy a rectangular area of a bitmap on another bitmap.
149 * Blitting is a common copy operation involving two bitmaps.
150 * A rectangular area of the source bitmap is copied bit-wise
151 * to a different position in the destination bitmap.
153 * \note Using the same bitmap for \a src and \a dst is unsupported.
155 * \param dst Bitmap where the operation writes.
156 * \param rect The (xmin;ymin) coordinates provide the top/left offset
157 * for drawing in the destination bitmap. If the source
158 * bitmap is larger than the rectangle, drawing is clipped.
159 * \param src Bitmap containing the source pixels.
160 * \param srcx Starting X offset in the source bitmap.
161 * \param srcy Starting Y offset in the source bitmap.
163 void gfx_blit(Bitmap *dst, const Rect *rect, const Bitmap *src, coord_t srcx, coord_t srcy)
165 coord_t dxmin, dymin, dxmax, dymax;
166 coord_t dx, dy, sx, sy;
169 * Pre-clip coordinates inside src->width/height.
173 dxmax = MIN(rect->xmax, rect->xmin + src->width);
174 dymax = MIN(rect->ymax, rect->ymin + src->height);
176 /* Perform regular clipping */
177 gfx_clip(dxmin, dxmax, srcx, dst->cr.xmin, dst->cr.xmax);
178 gfx_clip(dymin, dymax, srcy, dst->cr.ymin, dst->cr.ymax);
180 //kprintf("dxmin=%d, sxmin=%d, dxmax=%d; ", dxmin, sxmin, dxmax);
181 //kprintf("dymin=%d, symin=%d, dymax=%d\n", dymin, symin, dymax);
183 /* TODO: make it not as dog slow as this */
184 for (dx = dxmin, sx = srcx; dx < dxmax; ++dx, ++sx)
185 for (dy = dymin, sy = srcy; dy < dymax; ++dy, ++sy)
186 BM_DRAWPIXEL(dst, dx, dy, BM_READPIXEL(src, sx, sy));
190 * Blit a raster to a Bitmap.
192 * \todo Merge this function into gfx_blit()
196 void gfx_blitRaster(Bitmap *dst, coord_t dxmin, coord_t dymin,
197 const uint8_t *raster, coord_t w, coord_t h, coord_t stride)
199 coord_t dxmax = dxmin + w, dymax = dymin + h;
200 coord_t sxmin = 0, symin = 0;
201 coord_t dx, dy, sx, sy;
203 /* Perform regular clipping */
204 gfx_clip(dxmin, dxmax, sxmin, dst->cr.xmin, dst->cr.xmax);
205 gfx_clip(dymin, dymax, symin, dst->cr.ymin, dst->cr.ymax);
207 //kprintf("dxmin=%d, sxmin=%d, dxmax=%d; ", dxmin, sxmin, dxmax);
208 //kprintf("dymin=%d, symin=%d, dymax=%d\n", dymin, symin, dymax);
210 /* TODO: make it not as dog slow as this */
211 for (dx = dxmin, sx = sxmin; dx < dxmax; ++dx, ++sx)
212 for (dy = dymin, sy = symin; dy < dymax; ++dy, ++sy)
213 BM_DRAWPIXEL(dst, dx, dy, RAST_READPIXEL(raster, sx, sy, stride));
217 * Blit an Image to a Bitmap.
221 void gfx_blitImage(Bitmap *dst, coord_t dxmin, coord_t dymin, const Image *image)
225 gfx_blitRaster(dst, dxmin, dymin,
226 image->raster, image->width, image->height, image->stride);
230 #if CONFIG_GFX_CLIPPING || CONFIG_GFX_VCOORDS
233 * Set the bitmap clipping rectangle to the specified coordinates.
235 * All drawing performed on the bitmap will be clipped inside this
238 * The clipping rectangle is also used as a bounding box for the
239 * logical view of the virtual coordinate system.
241 * \note Following the convention used for all other operations, the
242 * top-left pixels of the rectangle are included, while the
243 * bottom-right pixels are considered outside the clipping region.
245 * \see gfx_setViewRect
247 void gfx_setClipRect(Bitmap *bm, coord_t minx, coord_t miny, coord_t maxx, coord_t maxy)
253 ASSERT(maxx <= bm->width);
254 ASSERT(maxy <= bm->height);
261 // kprintf("cr.xmin = %d, cr.ymin = %d, cr.xmax = %d, cr.ymax = %d\n",
262 // bm->cr.xMin, bm->cr.ymin, bm->cr.xmax, bm->cr.ymax);
265 #endif /* CONFIG_GFX_CLIPPING */