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.
11 * \author Bernardo Innocenti <bernie@develer.com>
12 * \author Stefano Fedrigo <aleph@develer.com>
14 * \brief Text graphic routines
19 *#* Revision 1.6 2004/09/14 20:57:15 bernie
20 *#* Use debug.h instead of kdebug.h.
22 *#* Revision 1.5 2004/09/06 21:51:26 bernie
23 *#* Extend interface to allow any algorithmic style.
25 *#* Revision 1.2 2004/06/03 11:27:09 bernie
26 *#* Add dual-license information.
28 *#* Revision 1.1 2004/05/23 15:43:16 bernie
29 *#* Import mware modules.
31 *#* Revision 1.17 2004/05/15 16:57:01 aleph
32 *#* Fixes for non-DEBUG build
34 *#* Revision 1.16 2004/04/03 20:42:49 aleph
37 *#* Revision 1.15 2004/03/24 15:03:45 bernie
38 *#* Use explicit include paths; clean Doxygen comments
40 *#* Revision 1.14 2004/03/19 16:52:28 bernie
41 *#* Move printf() like functions from text.c to text_format.c and add PROGMEM versions.
43 *#* Revision 1.13 2004/03/17 18:23:32 bernie
46 *#* Revision 1.12 2004/03/17 18:03:22 bernie
47 *#* Make diagnostic message shorter
49 *#* Revision 1.11 2004/03/13 22:52:54 aleph
50 *#* documentation fixes
59 * Flags degli stili algoritmici
61 * La routine di rendering del testo e' in grado di applicare
62 * delle semplici trasformazioni al font interno per generare
63 * automaticamente degli stili predefiniti (bold, italic,
64 * underline) a partire dal set di caratteri plain.
66 static uint8_t text_styles;
68 /*! ANSI escape sequences flag: true for ESC state on */
69 static bool ansi_mode = false;
73 * Move (imaginary) cursor to column and row specified.
74 * Next text write will start a that row and col.
76 void text_moveto(struct Bitmap *bm, int row, int col)
79 ASSERT(col < bm->width / FONT_WIDTH);
81 ASSERT(row < bm->height / FONT_HEIGHT);
83 bm->penX = col * FONT_WIDTH;
84 bm->penY = row * FONT_HEIGHT;
89 * Move (imaginary) cursor to coordinates specified.
91 void text_setcoord(struct Bitmap *bm, int x, int y)
99 * Render char \a c on Bitmap \a bm
101 static int text_putglyph(char c, struct Bitmap *bm)
103 const uint8_t * PROGMEM glyph; /* font is in progmem */
109 * Il carattere da stampare viene usato come indice per prelevare
110 * la prima colonna di dots del glyph all'interno del font.
112 glyph = font + (((unsigned char)c) * FONT_WIDTH);
113 glyph_width = FONT_WIDTH;
115 if (text_styles & STYLEF_CONDENSED)
118 if (text_styles & STYLEF_EXPANDED)
121 /* The y coord is rounded at multiples of 8 for simplicity */
122 bm->penY &= ~((coord_t)7);
124 /* Check if glyph to write fits in the bitmap */
125 if ((bm->penX < 0) || (bm->penX + glyph_width > bm->width) ||
126 (bm->penY < 0) || (bm->penY + FONT_HEIGHT > bm->height))
128 DB(kprintf("bad coords x=%d y=%d\n", bm->penX, bm->penY);)
132 /* Locate position where to write in the raster */
133 buf = bm->raster + bm->penY / 8 * bm->width + bm->penX;
135 bm->penX += glyph_width;
137 /* If some styles are set */
140 uint8_t prev_dots = 0, italic_prev_dots = 0, new_dots;
143 /* Per ogni colonna di dot del glyph... */
144 for (i = 0; i < glyph_width; ++i)
146 dots = pgm_read_byte(glyph);
148 /* Advance to next column in glyph.
149 * Expand: advances only once every two columns
151 if (!(text_styles & STYLEF_EXPANDED) || (i & 1))
154 /* Italic: get lower 4 dots from previous column */
155 if (text_styles & STYLEF_ITALIC)
158 dots = (dots & 0xF0) | italic_prev_dots;
159 italic_prev_dots = new_dots & 0x0F;
162 /* Bold: "or" pixels with the previous column */
163 if (text_styles & STYLEF_BOLD)
167 prev_dots = new_dots;
170 /* Underlined: turn on base pixel */
171 if (text_styles & STYLEF_UNDERLINE)
174 /* Inverted: invert pixels */
175 if (text_styles & STYLEF_INVERT)
182 else /* No style: fast vanilla copy of glyph to line buffer */
183 while (glyph_width--)
184 *buf++ = pgm_read_byte(glyph++);
191 * Render char \c c, with (currently) limited ANSI escapes
192 * emulation support and '\n' for newline.
194 int text_putchar(char c, struct Bitmap *bm)
196 /* Handle ANSI escape sequences */
201 case ANSI_ESC_CLEARSCREEN:
205 text_style(0, STYLEF_MASK);
208 kprintf("Unknown ANSI esc code: %x\n", c);)
212 else if (c == '\033') /* Enter ANSI ESC mode */
216 else if (c == '\n') /* Go one line down on a line-feed */
218 if (bm->penY + FONT_HEIGHT < bm->height)
220 bm->penY += FONT_HEIGHT;
226 text_putglyph(c, bm);
233 * Clear the screen and reset cursor position
235 void text_clear(struct Bitmap *bmp)
237 text_putchar('\x1b', bmp);
238 text_putchar('c', bmp);
242 void text_clearLine(struct Bitmap *bmp, int line)
244 gfx_ClearRect(bmp, 0, line * FONT_HEIGHT, bmp->width, (line + 1) * FONT_HEIGHT);
249 * Set/clear algorithmic font style bits.
251 * \param flags Style flags to set
252 * \param mask Mask of flags to modify
253 * \return Old style flags
256 * Turn on bold, leave other styles alone
257 * \code prt_style(STYLEF_BOLD, STYLEF_BOLD); \endcode
259 * Turn off bold and turn on italic, leave others as they are
260 * \code prt_style(STYLEF_ITALIC, STYLEF_BOLD | STYLEF_ITALIC); \endcode
262 * Query current style without chaning it
263 * \code style = prt_style(0, 0); \endcode
265 * Reset all styles (plain text)
266 * \code prt_style(0, STYLE_MASK); \endcode
268 uint8_t text_style(uint8_t flags, uint8_t mask)
270 uint8_t old = text_styles;
271 text_styles = (text_styles & ~mask) | flags;