-/*!
+/**
* \file
* <!--
* Copyright 2003, 2004, 2005, 2006 Develer S.r.l. (http://www.develer.com/)
/*#*
*#* $Log$
+ *#* Revision 1.12 2006/08/01 12:23:39 bernie
+ *#* gfx_setClipRect(): Also define when CONFIG_GFX_VCOORDS is enabled; Extend documentation.
+ *#*
+ *#* Revision 1.11 2006/07/19 12:56:26 bernie
+ *#* Convert to new Doxygen style.
+ *#*
+ *#* Revision 1.10 2006/05/27 17:21:15 bernie
+ *#* Factor out, simplify and document clipping.
+ *#*
+ *#* Revision 1.9 2006/05/25 23:35:40 bernie
+ *#* Cleanup.
+ *#*
*#* Revision 1.8 2006/03/27 04:48:56 bernie
*#* gfx_blitImage(): New function; gfx_blitRaster(): Fix clipping bug.
*#*
#endif
-/*!
+/**
* Initialize a Bitmap structure with the provided parameters.
*
* \note The pen position is reset to the origin.
}
-/*!
+/**
* 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)
{
#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.
*
}
#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.
*
coord_t dx, dy, sx, sy;
/*
- * Clip coordinates inside dst->cr and src->width/height.
+ * Pre-clip coordinates inside src->width/height.
*/
dxmin = rect->xmin;
- if (dxmin < dst->cr.xmin)
- {
- srcx += dst->cr.xmin - dxmin;
- dxmin = dst->cr.xmin;
- }
dymin = rect->ymin;
- if (dymin < dst->cr.ymin)
- {
- srcy += dst->cr.ymin - dymin;
- dymin = dst->cr.ymin;
- }
- dxmax = MIN(MIN(rect->xmax, rect->xmin + src->width), dst->cr.xmax);
- dymax = MIN(MIN(rect->ymax, rect->ymin + src->height), dst->cr.ymax);
+ 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)
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,
coord_t sxmin = 0, symin = 0;
coord_t dx, dy, sx, sy;
- /*
- * Clip coordinates inside dst->cr.
- */
- if (dxmin < dst->cr.xmin)
- {
- sxmin += dst->cr.xmin - dxmin;
- dxmin = dst->cr.xmin;
- }
- if (dymin < dst->cr.ymin)
- {
- symin += dst->cr.ymin - dymin;
- dymin = dst->cr.ymin;
- }
- dxmax = MIN(dxmax, dst->cr.xmax);
- dymax = MIN(dymax, dst->cr.ymax);
+ /* 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);
}
-/*!
+#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.
*
- * \note Following the convention used in all other operations, the
+ * 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)
{
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);
-*/
+// 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 */
+