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 1.13 2006/07/19 12:56:26 bernie
19 *#* Convert to new Doxygen style.
21 *#* Revision 1.12 2006/05/25 23:35:22 bernie
22 *#* Implement correct and faster clipping for algo text.
24 *#* Revision 1.11 2006/05/15 07:21:06 bernie
27 *#* Revision 1.10 2006/04/27 05:39:23 bernie
28 *#* Enhance text rendering to arbitrary x,y coords.
30 *#* Revision 1.9 2006/04/11 00:08:24 bernie
31 *#* text_offset(): New function, but I'm not quite confident with the design.
33 *#* Revision 1.8 2006/03/22 09:50:37 bernie
34 *#* Use the same format for fonts and rasters.
36 *#* Revision 1.7 2006/03/20 17:51:55 bernie
39 *#* Revision 1.6 2006/03/13 02:05:54 bernie
40 *#* Mark slow paths as UNLIKELY.
42 *#* Revision 1.5 2006/03/07 22:18:04 bernie
43 *#* Correctly compute text width for prop fonts; Make styles a per-bitmap attribute.
45 *#* Revision 1.4 2006/02/15 09:10:15 bernie
46 *#* Implement prop fonts; Fix algo styles.
48 *#* Revision 1.3 2006/02/10 12:31:55 bernie
49 *#* Add multiple font support in bitmaps.
51 *#* Revision 1.2 2005/11/04 18:17:45 bernie
52 *#* Fix header guards and includes for new location of gfx module.
54 *#* Revision 1.1 2005/11/04 18:11:35 bernie
55 *#* Move graphics stuff from mware/ to gfx/.
57 *#* Revision 1.13 2005/11/04 16:20:02 bernie
58 *#* Fix reference to README.devlib in header.
60 *#* Revision 1.12 2005/04/11 19:10:28 bernie
61 *#* Include top-level headers from cfg/ subdir.
63 *#* Revision 1.11 2005/01/20 18:46:31 aleph
64 *#* Fix progmem includes.
66 *#* Revision 1.10 2005/01/08 09:20:12 bernie
67 *#* Really make it work on both architectures.
69 *#* Revision 1.9 2004/12/31 16:44:29 bernie
70 *#* Sanitize for non-Harvard processors.
72 *#* Revision 1.8 2004/11/16 21:16:28 bernie
73 *#* Update to new naming scheme in mware/gfx.c.
75 *#* Revision 1.7 2004/09/20 03:28:28 bernie
78 *#* Revision 1.6 2004/09/14 20:57:15 bernie
79 *#* Use debug.h instead of kdebug.h.
81 *#* Revision 1.5 2004/09/06 21:51:26 bernie
82 *#* Extend interface to allow any algorithmic style.
84 *#* Revision 1.2 2004/06/03 11:27:09 bernie
85 *#* Add dual-license information.
87 *#* Revision 1.1 2004/05/23 15:43:16 bernie
88 *#* Import mware modules.
90 *#* Revision 1.17 2004/05/15 16:57:01 aleph
91 *#* Fixes for non-DEBUG build
93 *#* Revision 1.16 2004/04/03 20:42:49 aleph
96 *#* Revision 1.15 2004/03/24 15:03:45 bernie
97 *#* Use explicit include paths; clean Doxygen comments
99 *#* Revision 1.14 2004/03/19 16:52:28 bernie
100 *#* Move printf() like functions from text.c to text_format.c and add PROGMEM versions.
102 *#* Revision 1.13 2004/03/17 18:23:32 bernie
105 *#* Revision 1.12 2004/03/17 18:03:22 bernie
106 *#* Make diagnostic message shorter
108 *#* Revision 1.11 2004/03/13 22:52:54 aleph
109 *#* documentation fixes
113 #include <gfx/font.h>
114 #include <gfx/text.h>
115 #include <gfx/text.h>
117 #include <gfx/gfx_p.h> // FIXME: BM_DRAWPIXEL
119 #include <cfg/debug.h>
123 * ANSI escape sequences flag: true for ESC state on.
125 * \todo Move to Bitmap.flags.
127 static bool ansi_mode = false;
130 * Move (imaginary) cursor to coordinates specified.
132 void text_setCoord(struct Bitmap *bm, int x, int y)
140 * Move (imaginary) cursor to column and row specified.
141 * Next text write will start a that row and col.
143 void text_moveTo(struct Bitmap *bm, int row, int col)
146 ASSERT(col < bm->width / bm->font->width);
148 ASSERT(row < bm->height / bm->font->height);
150 text_setCoord(bm, col * bm->font->width, row * bm->font->height);
155 * Render char \a c on Bitmap \a bm.
157 static int text_putglyph(char c, struct Bitmap *bm)
159 const uint8_t * PROGMEM glyph; /* font is in progmem */
160 uint8_t glyph_width, glyph_height, glyph_height_bytes;
161 unsigned char index = (unsigned char)c;
163 /* Check for out of range char and replace with '?' or first char in font. */
164 if (UNLIKELY(!FONT_HAS_GLYPH(bm->font, index)))
166 kprintf("Illegal char '%c' (0x%02x)\n", index, index);
167 if (FONT_HAS_GLYPH(bm->font, '?'))
170 index = bm->font->first;
173 /* Make character relative to font start */
174 index -= bm->font->first;
176 glyph_height = bm->font->height;
177 // FIXME: for vertical fonts only
178 glyph_height_bytes = (glyph_height + 7) / 8;
180 if (bm->font->offset)
182 /* Proportional font */
183 glyph_width = bm->font->widths[index]; /* TODO: optimize away */
184 glyph = bm->font->glyph + bm->font->offset[index];
189 * Fixed-width font: compute the first column of pixels
190 * of the selected glyph using the character code to index
193 glyph_width = bm->font->width;
195 //For horizontal fonts
196 //glyph = bm->font->glyph + index * (((glyph_width + 7) / 8) * glyph_height);
197 glyph = bm->font->glyph + index * glyph_height_bytes * glyph_width;
200 /* Slow path for styled glyphs */
201 if (UNLIKELY(bm->styles))
203 uint8_t styles = bm->styles;
204 uint8_t prev_dots = 0, italic_prev_dots = 0;
206 uint8_t row, col, row_bit;
209 * To avoid repeating clipping and other expensive computations,
210 * we cluster calls to gfx_blitRaster() using a small buffer.
212 #define CONFIG_TEXT_RENDER_OPTIMIZE 1
213 #if CONFIG_TEXT_RENDER_OPTIMIZE
214 #define RENDER_BUF_WIDTH 12
215 #define RENDER_BUF_HEIGHT 8
216 uint8_t render_buf[RAST_SIZE(RENDER_BUF_WIDTH, RENDER_BUF_HEIGHT)];
217 uint8_t render_xpos = 0;
220 /* This style alone could be handled by the fast path too */
221 if (bm->styles & STYLEF_CONDENSED)
224 if (bm->styles & STYLEF_EXPANDED)
227 for (row = 0, row_bit = 0; row < glyph_height_bytes; ++row, row_bit += 8)
229 /* For each dot column in the glyph... */
230 for (col = 0; col < glyph_width; ++col)
232 uint8_t src_col = col;
234 /* Expanded style: advances only once every two columns. */
235 if (styles & STYLEF_EXPANDED)
238 /* Fetch a column of dots from glyph. */
239 dots = PGM_READ_CHAR(RAST_ADDR(glyph, src_col, row_bit, glyph_width));
241 /* Italic: get lower 4 dots from previous column */
242 if (styles & STYLEF_ITALIC)
244 uint8_t new_dots = dots;
245 dots = (dots & 0xF0) | italic_prev_dots;
246 italic_prev_dots = new_dots & 0x0F;
249 /* Bold: "or" pixels with the previous column */
250 if (styles & STYLEF_BOLD)
252 uint8_t new_dots = dots;
254 prev_dots = new_dots;
257 /* Underlined: turn on base pixel */
258 if ((styles & STYLEF_UNDERLINE)
259 && (row == glyph_height_bytes - 1))
260 dots |= (1 << (glyph_height - row_bit - 1));
262 /* Inverted: invert pixels */
263 if (styles & STYLEF_INVERT)
267 #if CONFIG_TEXT_RENDER_OPTIMIZE
268 render_buf[render_xpos++] = dots;
269 if (render_xpos == RENDER_BUF_WIDTH)
271 gfx_blitRaster(bm, bm->penX + col - render_xpos + 1, bm->penY + row_bit,
272 render_buf, render_xpos,
273 MIN((uint8_t)RENDER_BUF_HEIGHT, (uint8_t)(glyph_height - row_bit)),
278 gfx_blitRaster(bm, bm->penX + col, bm->penY + row_bit,
279 &dots, 1, MIN((uint8_t)8, glyph_height - row_bit), 1);
283 #if CONFIG_TEXT_RENDER_OPTIMIZE
284 /* Flush out rest of render buffer */
285 if (render_xpos != 0)
287 gfx_blitRaster(bm, bm->penX + col - render_xpos, bm->penY + row_bit,
288 render_buf, render_xpos,
289 MIN((uint8_t)RENDER_BUF_HEIGHT, (uint8_t)(glyph_height - row_bit)),
298 /* No style: fast vanilla copy of glyph to bitmap */
299 gfx_blitRaster(bm, bm->penX, bm->penY, glyph, glyph_width, glyph_height, glyph_width);
302 /* Update current pen position */
303 bm->penX += glyph_width;
310 * Render char \c c, with (currently) limited ANSI escapes
311 * emulation support and '\n' for newline.
313 int text_putchar(char c, struct Bitmap *bm)
315 /* Handle ANSI escape sequences */
316 if (UNLIKELY(ansi_mode))
320 case ANSI_ESC_CLEARSCREEN:
324 text_style(bm, 0, STYLEF_MASK);
327 kprintf("Unknown ANSI esc code: %x\n", c);)
331 else if (c == '\033') /* Enter ANSI ESC mode */
335 else if (c == '\n') /* Go one line down on a line-feed */
337 if (bm->penY + bm->font->height < bm->height)
339 bm->penY += bm->font->height;
345 text_putglyph(c, bm);
352 * Clear the screen and reset cursor position
354 void text_clear(struct Bitmap *bmp)
356 text_putchar('\x1b', bmp);
357 text_putchar('c', bmp);
361 void text_clearLine(struct Bitmap *bm, int line)
363 gfx_rectClear(bm, 0, line * bm->font->height, bm->width, (line + 1) * bm->font->height);
368 * Set/clear algorithmic font style bits.
370 * \param bm Pointer to Bitmap to affect.
371 * \param flags Style flags to set
372 * \param mask Mask of flags to modify
373 * \return Old style flags
376 * Turn on bold, leave other styles alone
377 * \code text_style(bm, STYLEF_BOLD, STYLEF_BOLD); \endcode
379 * Turn off bold and turn on italic, leave others as they are
380 * \code text_style(bm, STYLEF_ITALIC, STYLEF_BOLD | STYLEF_ITALIC); \endcode
382 * Query current style without chaning it
383 * \code style = text_style(bm, 0, 0); \endcode
385 * Reset all styles (plain text)
386 * \code text_style(bm, 0, STYLE_MASK); \endcode
388 uint8_t text_style(struct Bitmap *bm, uint8_t flags, uint8_t mask)
390 uint8_t old = bm->styles;
391 bm->styles = (bm->styles & ~mask) | flags;