--- /dev/null
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction. Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License. This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2003, 2004, 2005, 2006 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 1999 Bernardo Innocenti <bernie@develer.com>
+ *
+ * -->
+ *
+ * \author Bernardo Innocenti <bernie@develer.com>
+ * \author Stefano Fedrigo <aleph@develer.com>
+ *
+ * \brief Bitmap manipulation routines.
+ */
+
+#include "gfx.h"
+#include "gfx_p.h"
+
+#include <cfg/debug.h> /* ASSERT() */
+#include <cpu/attr.h> /* CPU_HARVARD */
+#include <cfg/macros.h> /* MIN() */
+#include <appconfig.h> /* CONFIG_GFX_CLIPPING */
+
+#include <string.h> /* memset() */
+
+#if CONFIG_GFX_TEXT
+#include <gfx/font.h> /* default_font */
+#endif
+
+
+/**
+ * Initialize a Bitmap structure with the provided parameters.
+ *
+ * \note The pen position is reset to the origin.
+ */
+void gfx_bitmapInit(Bitmap *bm, uint8_t *raster, coord_t w, coord_t h)
+{
+ bm->raster = raster;
+ bm->width = w;
+ bm->height = h;
+ #if (CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB)
+ bm->stride = (w + 7) / 8;
+ #elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
+ bm->stride = w;
+ #else
+ #error Unknown value of CONFIG_BITMAP_FMT
+ #endif /* CONFIG_BITMAP_FMT */
+ bm->penX = 0;
+ bm->penY = 0;
+
+#if CONFIG_GFX_TEXT
+ gfx_setFont(bm, &default_font);
+ bm->styles = 0;
+#endif
+
+#if CONFIG_GFX_CLIPPING
+ bm->cr.xmin = 0;
+ bm->cr.ymin = 0;
+ bm->cr.xmax = w;
+ bm->cr.ymax = h;
+#endif /* CONFIG_GFX_CLIPPING */
+}
+
+
+/**
+ * Clear the whole bitmap surface to the background color.
+ *
+ * \note This function does \b not update the current pen position.
+ * \note This function bypasses the current clipping area.
+ */
+void gfx_bitmapClear(Bitmap *bm)
+{
+ memset(bm->raster, 0, RAST_SIZE(bm->width, bm->height));
+}
+
+
+#if CPU_HARVARD
+
+#include <avr/pgmspace.h> /* FIXME: memcpy_P() */
+
+/**
+ * Copy a raster picture located in program memory in the bitmap.
+ * The size of the raster to copy *must* be the same of the raster bitmap.
+ *
+ * \note This function does \b not update the current pen position
+ */
+void gfx_blit_P(Bitmap *bm, const pgm_uint8_t *raster)
+{
+ memcpy_P(bm->raster, raster, RAST_SIZE(bm->width, bm->height));
+}
+#endif /* CPU_HARVARD */
+
+#if CONFIG_GFX_CLIPPING
+ /**
+ * Clip destination coordinates inside a clipping range.
+ *
+ * This macro helps a drawing operation to adjust its
+ * destination X and Y coordinates inside the destination
+ * clipping range.
+ *
+ * The source start coordinate is adjusted as well
+ * when destination start clipping occurs.
+ */
+ #define gfx_clip(dmin, dmax, smin, cmin, cmax) \
+ do { \
+ if ((dmin) < (cmin)) \
+ { \
+ (smin) += (cmin) - (dmin); \
+ (dmin) = (cmin); \
+ } \
+ (dmax) = MIN((dmax), (cmax)); \
+ } while(0)
+
+#else /* !CONFIG_GFX_CLIPPING */
+
+ #define gfx_clip(dmin, dmax, smin, cmin, cmax) do { } while (0)
+
+#endif /* !CONFIG_GFX_CLIPPING */
+
+
+/**
+ * Copy a rectangular area of a bitmap on another bitmap.
+ *
+ * Blitting is a common copy operation involving two bitmaps.
+ * A rectangular area of the source bitmap is copied bit-wise
+ * to a different position in the destination bitmap.
+ *
+ * \note Using the same bitmap for \a src and \a dst is unsupported.
+ *
+ * \param dst Bitmap where the operation writes.
+ * \param rect The (xmin;ymin) coordinates provide the top/left offset
+ * for drawing in the destination bitmap. If the source
+ * bitmap is larger than the rectangle, drawing is clipped.
+ * \param src Bitmap containing the source pixels.
+ * \param srcx Starting X offset in the source bitmap.
+ * \param srcy Starting Y offset in the source bitmap.
+ */
+void gfx_blit(Bitmap *dst, const Rect *rect, const Bitmap *src, coord_t srcx, coord_t srcy)
+{
+ coord_t dxmin, dymin, dxmax, dymax;
+ coord_t dx, dy, sx, sy;
+
+ /*
+ * Pre-clip coordinates inside src->width/height.
+ */
+ dxmin = rect->xmin;
+ dymin = rect->ymin;
+ dxmax = MIN(rect->xmax, rect->xmin + src->width);
+ dymax = MIN(rect->ymax, rect->ymin + src->height);
+
+ /* Perform regular clipping */
+ gfx_clip(dxmin, dxmax, srcx, dst->cr.xmin, dst->cr.xmax);
+ gfx_clip(dymin, dymax, srcy, dst->cr.ymin, dst->cr.ymax);
+
+ //kprintf("dxmin=%d, sxmin=%d, dxmax=%d; ", dxmin, sxmin, dxmax);
+ //kprintf("dymin=%d, symin=%d, dymax=%d\n", dymin, symin, dymax);
+
+ /* TODO: make it not as dog slow as this */
+ for (dx = dxmin, sx = srcx; dx < dxmax; ++dx, ++sx)
+ for (dy = dymin, sy = srcy; dy < dymax; ++dy, ++sy)
+ BM_DRAWPIXEL(dst, dx, dy, BM_READPIXEL(src, sx, sy));
+}
+
+/**
+ * Blit a raster to a Bitmap.
+ *
+ * \todo Merge this function into gfx_blit()
+ *
+ * \see gfx_blit()
+ */
+void gfx_blitRaster(Bitmap *dst, coord_t dxmin, coord_t dymin,
+ const uint8_t *raster, coord_t w, coord_t h, coord_t stride)
+{
+ coord_t dxmax = dxmin + w, dymax = dymin + h;
+ coord_t sxmin = 0, symin = 0;
+ coord_t dx, dy, sx, sy;
+
+ /* Perform regular clipping */
+ gfx_clip(dxmin, dxmax, sxmin, dst->cr.xmin, dst->cr.xmax);
+ gfx_clip(dymin, dymax, symin, dst->cr.ymin, dst->cr.ymax);
+
+ //kprintf("dxmin=%d, sxmin=%d, dxmax=%d; ", dxmin, sxmin, dxmax);
+ //kprintf("dymin=%d, symin=%d, dymax=%d\n", dymin, symin, dymax);
+
+ /* TODO: make it not as dog slow as this */
+ for (dx = dxmin, sx = sxmin; dx < dxmax; ++dx, ++sx)
+ for (dy = dymin, sy = symin; dy < dymax; ++dy, ++sy)
+ BM_DRAWPIXEL(dst, dx, dy, RAST_READPIXEL(raster, sx, sy, stride));
+}
+
+/**
+ * Blit an Image to a Bitmap.
+ *
+ * \see gfx_blit()
+ */
+void gfx_blitImage(Bitmap *dst, coord_t dxmin, coord_t dymin, const Image *image)
+{
+ ASSERT(image);
+
+ gfx_blitRaster(dst, dxmin, dymin,
+ image->raster, image->width, image->height, image->stride);
+}
+
+
+#if CONFIG_GFX_CLIPPING || CONFIG_GFX_VCOORDS
+
+/**
+ * Set the bitmap clipping rectangle to the specified coordinates.
+ *
+ * All drawing performed on the bitmap will be clipped inside this
+ * rectangle.
+ *
+ * The clipping rectangle is also used as a bounding box for the
+ * logical view of the virtual coordinate system.
+ *
+ * \note Following the convention used for all other operations, the
+ * top-left pixels of the rectangle are included, while the
+ * bottom-right pixels are considered outside the clipping region.
+ *
+ * \see gfx_setViewRect
+ */
+void gfx_setClipRect(Bitmap *bm, coord_t minx, coord_t miny, coord_t maxx, coord_t maxy)
+{
+ ASSERT(minx < maxx);
+ ASSERT(miny < maxy);
+ ASSERT(miny >= 0);
+ ASSERT(minx >= 0);
+ ASSERT(maxx <= bm->width);
+ ASSERT(maxy <= bm->height);
+
+ bm->cr.xmin = minx;
+ bm->cr.ymin = miny;
+ bm->cr.xmax = maxx;
+ bm->cr.ymax = maxy;
+
+// kprintf("cr.xmin = %d, cr.ymin = %d, cr.xmax = %d, cr.ymax = %d\n",
+// bm->cr.xMin, bm->cr.ymin, bm->cr.xmax, bm->cr.ymax);
+}
+
+#endif /* CONFIG_GFX_CLIPPING */
+
projects / bertos.git / blobdiff