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 1.15 2006/05/25 23:35:40 bernie
20 *#* Revision 1.14 2006/04/27 05:39:24 bernie
21 *#* Enhance text rendering to arbitrary x,y coords.
23 *#* Revision 1.13 2006/04/11 00:08:24 bernie
24 *#* text_offset(): New function, but I'm not quite confident with the design.
26 *#* Revision 1.12 2006/03/27 04:48:56 bernie
27 *#* gfx_blitImage(): New function; gfx_blitRaster(): Fix clipping bug.
29 *#* Revision 1.11 2006/03/07 22:18:04 bernie
30 *#* Correctly compute text width for prop fonts; Make styles a per-bitmap attribute.
32 *#* Revision 1.10 2006/02/17 22:24:40 bernie
33 *#* Fix undefined preprocessor symbol.
35 *#* Revision 1.9 2006/02/15 09:10:15 bernie
36 *#* Implement prop fonts; Fix algo styles.
38 *#* Revision 1.8 2006/02/10 12:28:33 bernie
39 *#* Add font support in bitmaps; Make bitmap formats public.
41 *#* Revision 1.7 2006/01/26 00:36:48 bernie
42 *#* Const correctness for some new functions.
44 *#* Revision 1.6 2006/01/23 23:13:04 bernie
45 *#* RECT_WIDTH(), RECT_HEIGHT(), RASTER_SIZE(): New macros.
47 *#* Revision 1.5 2006/01/17 02:31:29 bernie
48 *#* Add bitmap format support; Improve some comments.
54 #include <cfg/compiler.h>
55 #include <cfg/cpu.h> /* CPU_HARVARD */
57 #include <appconfig.h> /* CONFIG_GFX_* */
60 * \name Known pixel formats for bitmap representation.
63 #define BITMAP_FMT_PLANAR_H_MSB 1 /**< Planar pixels, horizontal bytes, MSB left. */
64 #define BITMAP_FMT_PLANAR_V_LSB 2 /**< Planar pixels, vertical bytes, LSB top. */
67 #if !defined(CONFIG_BITMAP_FMT) || (CONFIG_BITMAP_FMT != BITMAP_FMT_PLANAR_H_MSB && CONFIG_BITMAP_FMT != BITMAP_FMT_PLANAR_V_LSB)
68 #error CONFIG_BITMAP_FMT must be defined to either BITMAP_FMT_PLANAR_H_LSB or BITMAP_FMT_PLANAR_V_LSB
70 #if !defined(CONFIG_GFX_CLIPPING) || (CONFIG_GFX_CLIPPING != 0 && CONFIG_GFX_CLIPPING != 1)
71 #error CONFIG_GFX_CLIPPING must be defined to either 0 or 1
73 #if !defined(CONFIG_GFX_TEXT) || (CONFIG_GFX_TEXT != 0 && CONFIG_GFX_TEXT != 1)
74 #error CONFIG_GFX_TEXT must be defined to either 0 or 1
79 /*! Common type for coordinates expressed in pixel units */
82 #if CONFIG_GFX_VCOORDS
83 /*! Common type for coordinates expressed in logical units */
84 typedef float vcoord_t;
85 #endif /* CONFIG_GFX_VCOORDS */
89 * Describe a rectangular area with coordinates expressed in pixels.
91 * The rectangle is represented in terms of its top/left and
92 * right/bottom borders.
94 * In some cases, rectangles are assumed to obey to the
95 * following invariants:
100 * Oddly, the xmin and ymin coordinates are inclusive, while the
101 * xmax and ymax coordinates are non-inclusive. This design
102 * decision makes several computations simpler and lets you
103 * specify empty (0x0) rectangles without breaking the
106 * Computing the size of a rectangle can be done by simply
107 * subtracting the maximum X or Y coordinate from the minimum
110 typedef struct Rect { coord_t xmin, ymin, xmax, ymax; } Rect;
113 * Return the width of a rectangle in pixels.
115 * \note The argument \a r is evaluated twice.
117 #define RECT_WIDTH(r) ((r)->xmax - (r)->xmin)
120 * Return the height of a rectangle in pixels.
122 * \note The argument \a r is evaluated twice.
124 #define RECT_HEIGHT(r) ((r)->ymax - (r)->ymin)
130 * Control structure to draw in a bitmap
132 typedef struct Bitmap
134 uint8_t *raster; /*!< Pointer to byte array to hold the data */
135 coord_t width, height; /*!< Width/Height in pixels */
136 coord_t stride; /*!< Bytes per row. */
137 coord_t penX, penY; /*!< Current pen position MoveTo()/LineTo() */
139 Rect cr; /*!< Clip drawing inside this rectangle */
142 const struct Font *font;/**< Current font for text rendering. */
145 * Algorithmic text style flags.
147 * The text rendering routine can apply a few simple transformations
148 * to the current font in order to generate common styles such as
149 * bold, italic and underline from plain glyphs.
155 #if CONFIG_GFX_VCOORDS
157 * \name Logical coordinate system
161 vcoord_t scaleX, scaleY;
163 #endif /* CONFIG_GFX_VCOORDS */
170 * \todo Use this as Bitmap and change Bitmap to Drawable.
174 const uint8_t *raster; /*!< Pointer to byte array to hold the data. */
175 coord_t width; /*!< Raster width in pixels. */
176 coord_t height; /*!< Raster height in pixels. */
177 coord_t stride; /*!< Bytes per row. */
180 #if CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_H_MSB
182 * Compute the size in bytes of a raster suitable for
183 * holding a bitmap of \a width x \a height pixels.
185 #define RAST_SIZE(width, height) ( ((width) + 7 / 8) * (height) )
187 #elif CONFIG_BITMAP_FMT == BITMAP_FMT_PLANAR_V_LSB
189 * Compute the size in bytes of a raster suitable for
190 * holding a bitmap of \a width x \a height pixels.
192 #define RAST_SIZE(width, height) ( (width) * (((height) + 7) / 8) )
194 #error Unknown value of CONFIG_BITMAP_FMT
195 #endif /* CONFIG_BITMAP_FMT */
197 #define RASTER_SIZE RAST_SIZE /* OBSOLETE */
199 /* Function prototypes */
200 void gfx_bitmapInit (Bitmap *bm, uint8_t *raster, coord_t w, coord_t h);
201 void gfx_bitmapClear(Bitmap *bm);
202 void gfx_blit (Bitmap *dst, const Rect *rect, const Bitmap *src, coord_t srcx, coord_t srcy);
203 void gfx_blitRaster (Bitmap *dst, coord_t dx, coord_t dy, const uint8_t *raster, coord_t w, coord_t h, coord_t stride);
204 void gfx_blitImage (Bitmap *dst, coord_t dx, coord_t dy, const Image *image);
205 void gfx_line (Bitmap *bm, coord_t x1, coord_t y1, coord_t x2, coord_t y2);
206 void gfx_rectDraw (Bitmap *bm, coord_t x1, coord_t y1, coord_t x2, coord_t y2);
207 void gfx_rectFillC (Bitmap *bm, coord_t x1, coord_t y1, coord_t x2, coord_t y2, uint8_t color);
208 void gfx_rectFill (Bitmap *bm, coord_t x1, coord_t y1, coord_t x2, coord_t y2);
209 void gfx_rectClear (Bitmap *bm, coord_t x1, coord_t y1, coord_t x2, coord_t y2);
210 void gfx_moveTo (Bitmap *bm, coord_t x, coord_t y);
211 void gfx_lineTo (Bitmap *bm, coord_t x, coord_t y);
212 void gfx_setClipRect(Bitmap *bm, coord_t xmin, coord_t ymin, coord_t xmax, coord_t ymax);
215 #include <mware/pgm.h>
216 void gfx_blit_P(Bitmap *bm, const pgm_uint8_t *raster);
220 INLINE void gfx_setFont(Bitmap *bm, const struct Font *font)
226 #if CONFIG_GFX_VCOORDS
227 void gfx_setViewRect(Bitmap *bm, vcoord_t x1, vcoord_t y1, vcoord_t x2, vcoord_t y2);
228 coord_t gfx_transformX(Bitmap *bm, vcoord_t x);
229 coord_t gfx_transformY(Bitmap *bm, vcoord_t y);
230 void gfx_vline(Bitmap *bm, vcoord_t x1, vcoord_t y1, vcoord_t x2, vcoord_t y2);
231 #endif /* CONFIG_GFX_VCOORDS */
235 #endif /* GFX_GFX_H */