3 * Copyright 2003, 2004, 2005, 2006 Develer S.r.l. (http://www.develer.com/)
4 * Copyright 1999 Bernardo Innocenti <bernie@develer.com>
5 * This file is part of DevLib - See README.devlib for information.
9 * \author Bernardo Innocenti <bernie@develer.com>
10 * \author Stefano Fedrigo <aleph@develer.com>
12 * \brief General pourpose graphics routines
17 *#* Revision 1.13 2006/04/11 00:08:24 bernie
18 *#* text_offset(): New function, but I'm not quite confident with the design.
20 *#* Revision 1.12 2006/03/27 04:48:56 bernie
21 *#* gfx_blitImage(): New function; gfx_blitRaster(): Fix clipping bug.
23 *#* Revision 1.11 2006/03/07 22:18:04 bernie
24 *#* Correctly compute text width for prop fonts; Make styles a per-bitmap attribute.
26 *#* Revision 1.10 2006/02/17 22:24:40 bernie
27 *#* Fix undefined preprocessor symbol.
29 *#* Revision 1.9 2006/02/15 09:10:15 bernie
30 *#* Implement prop fonts; Fix algo styles.
32 *#* Revision 1.8 2006/02/10 12:28:33 bernie
33 *#* Add font support in bitmaps; Make bitmap formats public.
35 *#* Revision 1.7 2006/01/26 00:36:48 bernie
36 *#* Const correctness for some new functions.
38 *#* Revision 1.6 2006/01/23 23:13:04 bernie
39 *#* RECT_WIDTH(), RECT_HEIGHT(), RASTER_SIZE(): New macros.
41 *#* Revision 1.5 2006/01/17 02:31:29 bernie
42 *#* Add bitmap format support; Improve some comments.
48 #include <cfg/compiler.h>
49 #include <cfg/cpu.h> /* CPU_HARVARD */
51 #include <appconfig.h> /* CONFIG_GFX_* */
54 * \name Known pixel formats for bitmap representation.
57 #define BITMAP_FMT_PLANAR_H_MSB 1 /**< Planar pixels, horizontal bytes, MSB left. */
58 #define BITMAP_FMT_PLANAR_V_LSB 2 /**< Planar pixels, vertical bytes, LSB top. */
61 #if !defined(CONFIG_BITMAP_FMT) || (CONFIG_BITMAP_FMT != BITMAP_FMT_PLANAR_H_MSB && CONFIG_BITMAP_FMT != BITMAP_FMT_PLANAR_V_LSB)
62 #error CONFIG_BITMAP_FMT must be defined to either BITMAP_FMT_PLANAR_H_LSB or BITMAP_FMT_PLANAR_V_LSB
64 #if !defined(CONFIG_GFX_CLIPPING) || (CONFIG_GFX_CLIPPING != 0 && CONFIG_GFX_CLIPPING != 1)
65 #error CONFIG_GFX_CLIPPING must be defined to either 0 or 1
67 #if !defined(CONFIG_GFX_TEXT) || (CONFIG_GFX_TEXT != 0 && CONFIG_GFX_TEXT != 1)
68 #error CONFIG_GFX_TEXT must be defined to either 0 or 1
73 /*! Common type for coordinates expressed in pixel units */
76 #if CONFIG_GFX_VCOORDS
77 /*! Common type for coordinates expressed in logical units */
78 typedef float vcoord_t;
79 #endif /* CONFIG_GFX_VCOORDS */
83 * Describe a rectangular area with coordinates expressed in pixels.
85 * The rectangle is represented in terms of its top/left and
86 * right/bottom borders.
88 * In some cases, rectangles are assumed to obey to the
89 * following invariants:
94 * Oddly, the xmin and ymin coordinates are inclusive, while the
95 * xmax and ymax coordinates are non-inclusive. This design
96 * decision makes several computations simpler and lets you
97 * specify empty (0x0) rectangles without breaking the
100 * Computing the size of a rectangle can be done by simply
101 * subtracting the maximum X or Y coordinate from the minimum
104 typedef struct Rect { coord_t xmin, ymin, xmax, ymax; } Rect;
107 * Return the width of a rectangle in pixels.
109 * \note The argument \a r is evaluated twice.
111 #define RECT_WIDTH(r) ((r)->xmax - (r)->xmin)
114 * Return the height of a rectangle in pixels.
116 * \note The argument \a r is evaluated twice.
118 #define RECT_HEIGHT(r) ((r)->ymax - (r)->ymin)
124 * Control structure to draw in a bitmap
126 typedef struct Bitmap
128 uint8_t *raster; /*!< Pointer to byte array to hold the data */
129 coord_t width, height; /*!< Width/Height in pixels */
130 coord_t stride; /*!< Bytes per row. */
131 coord_t penX, penY; /*!< Current pen position MoveTo()/LineTo() */
133 Rect cr; /*!< Clip drawing inside this rectangle */
136 const struct Font *font;/**< Current font for text rendering. */
139 * Algorithmic text style flags.
141 * The text rendering routine can apply a few simple transformations
142 * to the current font in order to generate common styles such as
143 * bold, italic and underline from plain glyphs.
147 #if CONFIG_GFX_VCOORDS
149 * \name Logical coordinate system
153 vcoord_t scaleX, scaleY;
155 #endif /* CONFIG_GFX_VCOORDS */
162 * \todo Use this as Bitmap and change Bitmap to Drawable.
166 const uint8_t *raster; /*!< Pointer to byte array to hold the data. */
167 coord_t width; /*!< Raster width in pixels. */
168 coord_t height; /*!< Raster height in pixels. */
169 coord_t stride; /*!< Bytes per row. */
172 #if CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB
174 * Compute the size in bytes of a raster suitable for
175 * holding a bitmap of \a width x \a height pixels.
177 #define RASTER_SIZE(width, height) ( ((width) + 7 / 8) * (height) )
179 #elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
181 * Compute the size in bytes of a raster suitable for
182 * holding a bitmap of \a width x \a height pixels.
184 #define RASTER_SIZE(width, height) ( (width) * (((height) + 7) / 8) )
186 #error Unknown value of CONFIG_BITMAP_FMT
187 #endif /* CONFIG_BITMAP_FMT */
190 /* Function prototypes */
191 void gfx_bitmapInit (Bitmap *bm, uint8_t *raster, coord_t w, coord_t h);
192 void gfx_bitmapClear(Bitmap *bm);
193 void gfx_blit (Bitmap *dst, const Rect *rect, const Bitmap *src, coord_t srcx, coord_t srcy);
194 void gfx_blitRaster (Bitmap *dst, coord_t dx, coord_t dy, const uint8_t *raster, coord_t w, coord_t h, coord_t stride);
195 void gfx_blitImage (Bitmap *dst, coord_t dx, coord_t dy, const Image *image);
196 void gfx_line (Bitmap *bm, coord_t x1, coord_t y1, coord_t x2, coord_t y2);
197 void gfx_rectDraw (Bitmap *bm, coord_t x1, coord_t y1, coord_t x2, coord_t y2);
198 void gfx_rectFillC (Bitmap *bm, coord_t x1, coord_t y1, coord_t x2, coord_t y2, uint8_t color);
199 void gfx_rectFill (Bitmap *bm, coord_t x1, coord_t y1, coord_t x2, coord_t y2);
200 void gfx_rectClear (Bitmap *bm, coord_t x1, coord_t y1, coord_t x2, coord_t y2);
201 void gfx_moveTo (Bitmap *bm, coord_t x, coord_t y);
202 void gfx_lineTo (Bitmap *bm, coord_t x, coord_t y);
203 void gfx_setClipRect(Bitmap *bm, coord_t xmin, coord_t ymin, coord_t xmax, coord_t ymax);
206 #include <mware/pgm.h>
207 void gfx_blit_P(Bitmap *bm, const pgm_uint8_t *raster);
211 INLINE void gfx_setFont(Bitmap *bm, const struct Font *font)
217 #if CONFIG_GFX_VCOORDS
218 void gfx_setViewRect(Bitmap *bm, vcoord_t x1, vcoord_t y1, vcoord_t x2, vcoord_t y2);
219 coord_t gfx_transformX(Bitmap *bm, vcoord_t x);
220 coord_t gfx_transformY(Bitmap *bm, vcoord_t y);
221 void gfx_vline(Bitmap *bm, vcoord_t x1, vcoord_t y1, vcoord_t x2, vcoord_t y2);
222 #endif /* CONFIG_GFX_VCOORDS */
226 #endif /* GFX_GFX_H */