4 * Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 1999 Bernardo Innocenti <bernie@develer.com>
6 * This file is part of DevLib - See README.devlib for information.
9 * \brief Text graphic routines
12 * \author Bernardo Innocenti <bernie@develer.com>
13 * \author Stefano Fedrigo <aleph@develer.com>
18 *#* Revision 1.6 2006/03/13 02:05:54 bernie
19 *#* Mark slow paths as UNLIKELY.
21 *#* Revision 1.5 2006/03/07 22:18:04 bernie
22 *#* Correctly compute text width for prop fonts; Make styles a per-bitmap attribute.
24 *#* Revision 1.4 2006/02/15 09:10:15 bernie
25 *#* Implement prop fonts; Fix algo styles.
27 *#* Revision 1.3 2006/02/10 12:31:55 bernie
28 *#* Add multiple font support in bitmaps.
30 *#* Revision 1.2 2005/11/04 18:17:45 bernie
31 *#* Fix header guards and includes for new location of gfx module.
33 *#* Revision 1.1 2005/11/04 18:11:35 bernie
34 *#* Move graphics stuff from mware/ to gfx/.
36 *#* Revision 1.13 2005/11/04 16:20:02 bernie
37 *#* Fix reference to README.devlib in header.
39 *#* Revision 1.12 2005/04/11 19:10:28 bernie
40 *#* Include top-level headers from cfg/ subdir.
42 *#* Revision 1.11 2005/01/20 18:46:31 aleph
43 *#* Fix progmem includes.
45 *#* Revision 1.10 2005/01/08 09:20:12 bernie
46 *#* Really make it work on both architectures.
48 *#* Revision 1.9 2004/12/31 16:44:29 bernie
49 *#* Sanitize for non-Harvard processors.
51 *#* Revision 1.8 2004/11/16 21:16:28 bernie
52 *#* Update to new naming scheme in mware/gfx.c.
54 *#* Revision 1.7 2004/09/20 03:28:28 bernie
57 *#* Revision 1.6 2004/09/14 20:57:15 bernie
58 *#* Use debug.h instead of kdebug.h.
60 *#* Revision 1.5 2004/09/06 21:51:26 bernie
61 *#* Extend interface to allow any algorithmic style.
63 *#* Revision 1.2 2004/06/03 11:27:09 bernie
64 *#* Add dual-license information.
66 *#* Revision 1.1 2004/05/23 15:43:16 bernie
67 *#* Import mware modules.
69 *#* Revision 1.17 2004/05/15 16:57:01 aleph
70 *#* Fixes for non-DEBUG build
72 *#* Revision 1.16 2004/04/03 20:42:49 aleph
75 *#* Revision 1.15 2004/03/24 15:03:45 bernie
76 *#* Use explicit include paths; clean Doxygen comments
78 *#* Revision 1.14 2004/03/19 16:52:28 bernie
79 *#* Move printf() like functions from text.c to text_format.c and add PROGMEM versions.
81 *#* Revision 1.13 2004/03/17 18:23:32 bernie
84 *#* Revision 1.12 2004/03/17 18:03:22 bernie
85 *#* Make diagnostic message shorter
87 *#* Revision 1.11 2004/03/13 22:52:54 aleph
88 *#* documentation fixes
96 #include <gfx/gfx_p.h> // FIXME: BM_DRAWPIXEL
98 #include <cfg/debug.h>
101 /*! ANSI escape sequences flag: true for ESC state on */
102 static bool ansi_mode = false;
106 * Move (imaginary) cursor to column and row specified.
107 * Next text write will start a that row and col.
109 void text_moveto(struct Bitmap *bm, int row, int col)
112 ASSERT(col < bm->width / bm->font->width);
114 ASSERT(row < bm->height / bm->font->height);
116 bm->penX = col * bm->font->width;
117 bm->penY = row * bm->font->height;
122 * Move (imaginary) cursor to coordinates specified.
124 void text_setcoord(struct Bitmap *bm, int x, int y)
132 * Render char \a c on Bitmap \a bm.
134 static int text_putglyph(char c, struct Bitmap *bm)
136 const uint8_t * PROGMEM glyph; /* font is in progmem */
137 uint8_t glyph_width, glyph_height, glyph_height_bytes;
138 unsigned char index = (unsigned char)c;
140 /* Check for out of range char and replace with '?' or first char in font. */
141 if (UNLIKELY(!FONT_HAS_GLYPH(bm->font, index)))
143 kprintf("Illegal char '%c' (0x%02x)\n", index, index);
144 if (FONT_HAS_GLYPH(bm->font, '?'))
147 index = bm->font->first;
150 /* Make character relative to font start */
151 index -= bm->font->first;
153 glyph_height = bm->font->height;
154 // FIXME: for vertical fonts only
155 glyph_height_bytes = (glyph_height + 7) / 8;
157 if (bm->font->offset)
159 /* Proportional font */
160 glyph_width = bm->font->widths[index]; /* TODO: optimize away */
161 glyph = bm->font->glyph + bm->font->offset[index];
166 * Fixed-width font: compute the first column of pixels
167 * of the selected glyph using the character code to index
170 glyph_width = bm->font->width;
172 //For horizontal fonts
173 //glyph = bm->font->glyph + index * (((glyph_width + 7) / 8) * glyph_height);
174 glyph = bm->font->glyph + index * glyph_height_bytes * glyph_width;
177 /* Slow path for styled glyphs */
178 if (UNLIKELY(bm->styles))
180 uint8_t prev_dots = 0, italic_prev_dots = 0;
184 /* This style alone could be handled by the fast path too */
185 if (bm->styles & STYLEF_CONDENSED)
188 if (bm->styles & STYLEF_EXPANDED)
191 /* Check if glyph fits in the bitmap. */
192 if ((bm->penX < 0) || (bm->penX + glyph_width > bm->width)
193 || (bm->penY < 0) || (bm->penY + glyph_height > bm->height))
195 kprintf("bad coords x=%d y=%d\n", bm->penX, bm->penY);
199 for (row = 0; row < glyph_height_bytes; ++row)
201 /* For each dot column in the glyph... */
202 for (col = 0; col < glyph_width; ++col)
204 uint8_t src_col = col;
207 /* Expanded style: advances only once every two columns. */
208 if (bm->styles & STYLEF_EXPANDED)
211 /* Fetch a column of dots from glyph. */
212 dots = PGM_READ_CHAR(glyph + src_col * glyph_height_bytes + row);
214 /* Italic: get lower 4 dots from previous column */
215 if (bm->styles & STYLEF_ITALIC)
217 uint8_t new_dots = dots;
218 dots = (dots & 0xF0) | italic_prev_dots;
219 italic_prev_dots = new_dots & 0x0F;
222 /* Bold: "or" pixels with the previous column */
223 if (bm->styles & STYLEF_BOLD)
225 uint8_t new_dots = dots;
227 prev_dots = new_dots;
230 /* Underlined: turn on base pixel */
231 if (bm->styles & STYLEF_UNDERLINE)
234 /* Inverted: invert pixels */
235 if (bm->styles & STYLEF_INVERT)
239 for (i = 0; i < 8 && (row * 8) + i < glyph_height; ++i)
240 BM_DRAWPIXEL(bm, bm->penX + col, bm->penY + row * 8 + i, dots & (1<<i));
246 /* No style: fast vanilla copy of glyph to bitmap */
247 gfx_blitRaster(bm, bm->penX, bm->penY, glyph, glyph_width, glyph_height, glyph_height_bytes);
250 /* Update current pen position */
251 bm->penX += glyph_width;
258 * Render char \c c, with (currently) limited ANSI escapes
259 * emulation support and '\n' for newline.
261 int text_putchar(char c, struct Bitmap *bm)
263 /* Handle ANSI escape sequences */
264 if (UNLIKELY(ansi_mode))
268 case ANSI_ESC_CLEARSCREEN:
272 text_style(bm, 0, STYLEF_MASK);
275 kprintf("Unknown ANSI esc code: %x\n", c);)
279 else if (c == '\033') /* Enter ANSI ESC mode */
283 else if (c == '\n') /* Go one line down on a line-feed */
285 if (bm->penY + bm->font->height < bm->height)
287 bm->penY += bm->font->height;
293 text_putglyph(c, bm);
300 * Clear the screen and reset cursor position
302 void text_clear(struct Bitmap *bmp)
304 text_putchar('\x1b', bmp);
305 text_putchar('c', bmp);
309 void text_clearLine(struct Bitmap *bm, int line)
311 gfx_rectClear(bm, 0, line * bm->font->height, bm->width, (line + 1) * bm->font->height);
316 * Set/clear algorithmic font style bits.
318 * \param bm Pointer to Bitmap to affect.
319 * \param flags Style flags to set
320 * \param mask Mask of flags to modify
321 * \return Old style flags
324 * Turn on bold, leave other styles alone
325 * \code text_style(bm, STYLEF_BOLD, STYLEF_BOLD); \endcode
327 * Turn off bold and turn on italic, leave others as they are
328 * \code text_style(bm, STYLEF_ITALIC, STYLEF_BOLD | STYLEF_ITALIC); \endcode
330 * Query current style without chaning it
331 * \code style = text_style(bm, 0, 0); \endcode
333 * Reset all styles (plain text)
334 * \code text_style(bm, 0, STYLE_MASK); \endcode
336 uint8_t text_style(struct Bitmap *bm, uint8_t flags, uint8_t mask)
338 uint8_t old = bm->styles;
339 bm->styles = (bm->styles & ~mask) | flags;