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 1.7 2004/09/20 03:28:28 bernie
21 *#* Revision 1.6 2004/09/14 20:57:15 bernie
22 *#* Use debug.h instead of kdebug.h.
24 *#* Revision 1.5 2004/09/06 21:51:26 bernie
25 *#* Extend interface to allow any algorithmic style.
27 *#* Revision 1.2 2004/06/03 11:27:09 bernie
28 *#* Add dual-license information.
30 *#* Revision 1.1 2004/05/23 15:43:16 bernie
31 *#* Import mware modules.
33 *#* Revision 1.17 2004/05/15 16:57:01 aleph
34 *#* Fixes for non-DEBUG build
36 *#* Revision 1.16 2004/04/03 20:42:49 aleph
39 *#* Revision 1.15 2004/03/24 15:03:45 bernie
40 *#* Use explicit include paths; clean Doxygen comments
42 *#* Revision 1.14 2004/03/19 16:52:28 bernie
43 *#* Move printf() like functions from text.c to text_format.c and add PROGMEM versions.
45 *#* Revision 1.13 2004/03/17 18:23:32 bernie
48 *#* Revision 1.12 2004/03/17 18:03:22 bernie
49 *#* Make diagnostic message shorter
51 *#* Revision 1.11 2004/03/13 22:52:54 aleph
52 *#* documentation fixes
61 * Flags degli stili algoritmici
63 * La routine di rendering del testo e' in grado di applicare
64 * delle semplici trasformazioni al font interno per generare
65 * automaticamente degli stili predefiniti (bold, italic,
66 * underline) a partire dal set di caratteri plain.
68 static uint8_t text_styles;
70 /*! ANSI escape sequences flag: true for ESC state on */
71 static bool ansi_mode = false;
75 * Move (imaginary) cursor to column and row specified.
76 * Next text write will start a that row and col.
78 void text_moveto(struct Bitmap *bm, int row, int col)
81 ASSERT(col < bm->width / FONT_WIDTH);
83 ASSERT(row < bm->height / FONT_HEIGHT);
85 bm->penX = col * FONT_WIDTH;
86 bm->penY = row * FONT_HEIGHT;
91 * Move (imaginary) cursor to coordinates specified.
93 void text_setcoord(struct Bitmap *bm, int x, int y)
101 * Render char \a c on Bitmap \a bm
103 static int text_putglyph(char c, struct Bitmap *bm)
105 const uint8_t * PROGMEM glyph; /* font is in progmem */
111 * Il carattere da stampare viene usato come indice per prelevare
112 * la prima colonna di dots del glyph all'interno del font.
114 glyph = font + (((unsigned char)c) * FONT_WIDTH);
115 glyph_width = FONT_WIDTH;
117 if (text_styles & STYLEF_CONDENSED)
120 if (text_styles & STYLEF_EXPANDED)
123 /* The y coord is rounded at multiples of 8 for simplicity */
124 bm->penY &= ~((coord_t)7);
126 /* Check if glyph to write fits in the bitmap */
127 if ((bm->penX < 0) || (bm->penX + glyph_width > bm->width) ||
128 (bm->penY < 0) || (bm->penY + FONT_HEIGHT > bm->height))
130 DB(kprintf("bad coords x=%d y=%d\n", bm->penX, bm->penY);)
134 /* Locate position where to write in the raster */
135 buf = bm->raster + bm->penY / 8 * bm->width + bm->penX;
137 bm->penX += glyph_width;
139 /* If some styles are set */
142 uint8_t prev_dots = 0, italic_prev_dots = 0, new_dots;
145 /* Per ogni colonna di dot del glyph... */
146 for (i = 0; i < glyph_width; ++i)
148 dots = pgm_read_byte(glyph);
150 /* Advance to next column in glyph.
151 * Expand: advances only once every two columns
153 if (!(text_styles & STYLEF_EXPANDED) || (i & 1))
156 /* Italic: get lower 4 dots from previous column */
157 if (text_styles & STYLEF_ITALIC)
160 dots = (dots & 0xF0) | italic_prev_dots;
161 italic_prev_dots = new_dots & 0x0F;
164 /* Bold: "or" pixels with the previous column */
165 if (text_styles & STYLEF_BOLD)
169 prev_dots = new_dots;
172 /* Underlined: turn on base pixel */
173 if (text_styles & STYLEF_UNDERLINE)
176 /* Inverted: invert pixels */
177 if (text_styles & STYLEF_INVERT)
184 else /* No style: fast vanilla copy of glyph to line buffer */
185 while (glyph_width--)
186 *buf++ = pgm_read_byte(glyph++);
193 * Render char \c c, with (currently) limited ANSI escapes
194 * emulation support and '\n' for newline.
196 int text_putchar(char c, struct Bitmap *bm)
198 /* Handle ANSI escape sequences */
203 case ANSI_ESC_CLEARSCREEN:
207 text_style(0, STYLEF_MASK);
210 kprintf("Unknown ANSI esc code: %x\n", c);)
214 else if (c == '\033') /* Enter ANSI ESC mode */
218 else if (c == '\n') /* Go one line down on a line-feed */
220 if (bm->penY + FONT_HEIGHT < bm->height)
222 bm->penY += FONT_HEIGHT;
228 text_putglyph(c, bm);
235 * Clear the screen and reset cursor position
237 void text_clear(struct Bitmap *bmp)
239 text_putchar('\x1b', bmp);
240 text_putchar('c', bmp);
244 void text_clearLine(struct Bitmap *bmp, int line)
246 gfx_ClearRect(bmp, 0, line * FONT_HEIGHT, bmp->width, (line + 1) * FONT_HEIGHT);
251 * Set/clear algorithmic font style bits.
253 * \param flags Style flags to set
254 * \param mask Mask of flags to modify
255 * \return Old style flags
258 * Turn on bold, leave other styles alone
259 * \code prt_style(STYLEF_BOLD, STYLEF_BOLD); \endcode
261 * Turn off bold and turn on italic, leave others as they are
262 * \code prt_style(STYLEF_ITALIC, STYLEF_BOLD | STYLEF_ITALIC); \endcode
264 * Query current style without chaning it
265 * \code style = prt_style(0, 0); \endcode
267 * Reset all styles (plain text)
268 * \code prt_style(0, STYLE_MASK); \endcode
270 uint8_t text_style(uint8_t flags, uint8_t mask)
272 uint8_t old = text_styles;
273 text_styles = (text_styles & ~mask) | flags;