4 * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 1999 Bernardo Innocenti <bernie@develer.com>
6 * This file is part of DevLib - See devlib/README for information.
9 * \brief Text graphic routines
12 * \author Bernardo Innocenti <bernie@develer.com>
13 * \author Stefano Fedrigo <aleph@develer.com>
18 *#* Revision 1.8 2004/11/16 21:16:28 bernie
19 *#* Update to new naming scheme in mware/gfx.c.
21 *#* Revision 1.7 2004/09/20 03:28:28 bernie
24 *#* Revision 1.6 2004/09/14 20:57:15 bernie
25 *#* Use debug.h instead of kdebug.h.
27 *#* Revision 1.5 2004/09/06 21:51:26 bernie
28 *#* Extend interface to allow any algorithmic style.
30 *#* Revision 1.2 2004/06/03 11:27:09 bernie
31 *#* Add dual-license information.
33 *#* Revision 1.1 2004/05/23 15:43:16 bernie
34 *#* Import mware modules.
36 *#* Revision 1.17 2004/05/15 16:57:01 aleph
37 *#* Fixes for non-DEBUG build
39 *#* Revision 1.16 2004/04/03 20:42:49 aleph
42 *#* Revision 1.15 2004/03/24 15:03:45 bernie
43 *#* Use explicit include paths; clean Doxygen comments
45 *#* Revision 1.14 2004/03/19 16:52:28 bernie
46 *#* Move printf() like functions from text.c to text_format.c and add PROGMEM versions.
48 *#* Revision 1.13 2004/03/17 18:23:32 bernie
51 *#* Revision 1.12 2004/03/17 18:03:22 bernie
52 *#* Make diagnostic message shorter
54 *#* Revision 1.11 2004/03/13 22:52:54 aleph
55 *#* documentation fixes
64 * Flags degli stili algoritmici
66 * La routine di rendering del testo e' in grado di applicare
67 * delle semplici trasformazioni al font interno per generare
68 * automaticamente degli stili predefiniti (bold, italic,
69 * underline) a partire dal set di caratteri plain.
71 static uint8_t text_styles;
73 /*! ANSI escape sequences flag: true for ESC state on */
74 static bool ansi_mode = false;
78 * Move (imaginary) cursor to column and row specified.
79 * Next text write will start a that row and col.
81 void text_moveto(struct Bitmap *bm, int row, int col)
84 ASSERT(col < bm->width / FONT_WIDTH);
86 ASSERT(row < bm->height / FONT_HEIGHT);
88 bm->penX = col * FONT_WIDTH;
89 bm->penY = row * FONT_HEIGHT;
94 * Move (imaginary) cursor to coordinates specified.
96 void text_setcoord(struct Bitmap *bm, int x, int y)
104 * Render char \a c on Bitmap \a bm
106 static int text_putglyph(char c, struct Bitmap *bm)
108 const uint8_t * PROGMEM glyph; /* font is in progmem */
114 * Il carattere da stampare viene usato come indice per prelevare
115 * la prima colonna di dots del glyph all'interno del font.
117 glyph = font + (((unsigned char)c) * FONT_WIDTH);
118 glyph_width = FONT_WIDTH;
120 if (text_styles & STYLEF_CONDENSED)
123 if (text_styles & STYLEF_EXPANDED)
126 /* The y coord is rounded at multiples of 8 for simplicity */
127 bm->penY &= ~((coord_t)7);
129 /* Check if glyph to write fits in the bitmap */
130 if ((bm->penX < 0) || (bm->penX + glyph_width > bm->width) ||
131 (bm->penY < 0) || (bm->penY + FONT_HEIGHT > bm->height))
133 DB(kprintf("bad coords x=%d y=%d\n", bm->penX, bm->penY);)
137 /* Locate position where to write in the raster */
138 buf = bm->raster + bm->penY / 8 * bm->width + bm->penX;
140 bm->penX += glyph_width;
142 /* If some styles are set */
145 uint8_t prev_dots = 0, italic_prev_dots = 0, new_dots;
148 /* Per ogni colonna di dot del glyph... */
149 for (i = 0; i < glyph_width; ++i)
151 dots = pgm_read_byte(glyph);
153 /* Advance to next column in glyph.
154 * Expand: advances only once every two columns
156 if (!(text_styles & STYLEF_EXPANDED) || (i & 1))
159 /* Italic: get lower 4 dots from previous column */
160 if (text_styles & STYLEF_ITALIC)
163 dots = (dots & 0xF0) | italic_prev_dots;
164 italic_prev_dots = new_dots & 0x0F;
167 /* Bold: "or" pixels with the previous column */
168 if (text_styles & STYLEF_BOLD)
172 prev_dots = new_dots;
175 /* Underlined: turn on base pixel */
176 if (text_styles & STYLEF_UNDERLINE)
179 /* Inverted: invert pixels */
180 if (text_styles & STYLEF_INVERT)
187 else /* No style: fast vanilla copy of glyph to line buffer */
188 while (glyph_width--)
189 *buf++ = pgm_read_byte(glyph++);
196 * Render char \c c, with (currently) limited ANSI escapes
197 * emulation support and '\n' for newline.
199 int text_putchar(char c, struct Bitmap *bm)
201 /* Handle ANSI escape sequences */
206 case ANSI_ESC_CLEARSCREEN:
210 text_style(0, STYLEF_MASK);
213 kprintf("Unknown ANSI esc code: %x\n", c);)
217 else if (c == '\033') /* Enter ANSI ESC mode */
221 else if (c == '\n') /* Go one line down on a line-feed */
223 if (bm->penY + FONT_HEIGHT < bm->height)
225 bm->penY += FONT_HEIGHT;
231 text_putglyph(c, bm);
238 * Clear the screen and reset cursor position
240 void text_clear(struct Bitmap *bmp)
242 text_putchar('\x1b', bmp);
243 text_putchar('c', bmp);
247 void text_clearLine(struct Bitmap *bmp, int line)
249 gfx_rectClear(bmp, 0, line * FONT_HEIGHT, bmp->width, (line + 1) * FONT_HEIGHT);
254 * Set/clear algorithmic font style bits.
256 * \param flags Style flags to set
257 * \param mask Mask of flags to modify
258 * \return Old style flags
261 * Turn on bold, leave other styles alone
262 * \code prt_style(STYLEF_BOLD, STYLEF_BOLD); \endcode
264 * Turn off bold and turn on italic, leave others as they are
265 * \code prt_style(STYLEF_ITALIC, STYLEF_BOLD | STYLEF_ITALIC); \endcode
267 * Query current style without chaning it
268 * \code style = prt_style(0, 0); \endcode
270 * Reset all styles (plain text)
271 * \code prt_style(0, STYLE_MASK); \endcode
273 uint8_t text_style(uint8_t flags, uint8_t mask)
275 uint8_t old = text_styles;
276 text_styles = (text_styles & ~mask) | flags;