4 * Copyright 1999 Bernardo Innocenti <bernie@develer.com>
5 * Copyright 2003,2004 Develer S.r.l. (http://www.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 1.2 2004/06/03 11:27:09 bernie
20 * Add dual-license information.
22 * Revision 1.1 2004/05/23 15:43:16 bernie
23 * Import mware modules.
25 * Revision 1.17 2004/05/15 16:57:01 aleph
26 * Fixes for non-DEBUG build
28 * Revision 1.16 2004/04/03 20:42:49 aleph
31 * Revision 1.15 2004/03/24 15:03:45 bernie
32 * Use explicit include paths; clean Doxygen comments
34 * Revision 1.14 2004/03/19 16:52:28 bernie
35 * Move printf() like functions from text.c to text_format.c and add PROGMEM versions.
37 * Revision 1.13 2004/03/17 18:23:32 bernie
40 * Revision 1.12 2004/03/17 18:03:22 bernie
41 * Make diagnostic message shorter
43 * Revision 1.11 2004/03/13 22:52:54 aleph
50 #include <drv/kdebug.h>
53 * Flags degli stili algoritmici
54 * La routine di rendering del testo e' in grado di applicare
55 * delle semplici trasformazioni al font interno per generare
56 * automaticamente degli stili predefiniti (bold, italic,
57 * underline) a partire dal set di caratteri plain.
59 static uint8_t text_styles;
61 /*! ANSI escape sequences flag: true for ESC state on */
62 static bool ansi_mode = false;
66 * Move (imaginary) cursor to column and row specified.
67 * Next text write will start a that row and col.
69 void text_moveto(struct Bitmap *bm, int row, int col)
72 ASSERT(col < bm->width / FONT_WIDTH);
74 ASSERT(row < bm->height / FONT_HEIGHT);
76 bm->penX = col * FONT_WIDTH;
77 bm->penY = row * FONT_HEIGHT;
82 * Move (imaginary) cursor to coordinates specified.
84 void text_setcoord(struct Bitmap *bm, int x, int y)
92 * Render char <code>c</code>
94 static int text_putglyph(char c, struct Bitmap *bm)
96 const uint8_t * PROGMEM glyph; /* font is in progmem */
102 * Il carattere da stampare viene usato come indice per prelevare
103 * la prima colonna di dots del glyph all'interno del font.
105 glyph = font + (((unsigned char)c) * FONT_WIDTH);
106 glyph_width = FONT_WIDTH;
108 if (text_styles & STYLEF_CONDENSED)
111 if (text_styles & STYLEF_EXPANDED)
114 /* The y coord is rounded at multiples of 8 for simplicity */
115 bm->penY &= ~((coord_t)7);
117 /* Check if glyph to write fits in the bitmap */
118 if ((bm->penX < 0) || (bm->penX + glyph_width > bm->width) ||
119 (bm->penY < 0) || (bm->penY + FONT_HEIGHT > bm->height))
121 DB(kprintf("bad coords x=%d y=%d\n", bm->penX, bm->penY);)
125 /* Locate position where to write in the raster */
126 buf = bm->raster + bm->penY / 8 * bm->width + bm->penX;
128 bm->penX += glyph_width;
130 /* If some styles are set */
133 uint8_t prev_dots = 0, italic_prev_dots = 0, new_dots;
136 /* Per ogni colonna di dot del glyph... */
137 for (i = 0; i < glyph_width; ++i)
139 dots = pgm_read_byte(glyph);
141 /* Advance to next column in glyph.
142 * Expand: advances only once every two columns
144 if (!(text_styles & STYLEF_EXPANDED) || (i & 1))
147 /* Italic: get lower 4 dots from previous column */
148 if (text_styles & STYLEF_ITALIC)
151 dots = (dots & 0xF0) | italic_prev_dots;
152 italic_prev_dots = new_dots & 0x0F;
155 /* Bold: "or" pixels with the previous column */
156 if (text_styles & STYLEF_BOLD)
160 prev_dots = new_dots;
163 /* Underlined: turn on base pixel */
164 if (text_styles & STYLEF_UNDERLINE)
167 /* Inverted: invert pixels */
168 if (text_styles & STYLEF_INVERT)
175 else /* No style: fast vanilla copy of glyph to line buffer */
176 while (glyph_width--)
177 *buf++ = pgm_read_byte(glyph++);
184 * Render char \c c, with (currently) limited ANSI escapes
185 * emulation support and '\n' for newline.
187 int text_putchar(char c, struct Bitmap *bm)
189 /* Handle ANSI escape sequences */
194 case ANSI_ESC_CLEARSCREEN:
198 text_style(0, STYLEF_MASK);
201 kprintf("Unknown ANSI esc code: %x\n", c);)
205 else if (c == '\033') /* Enter ANSI ESC mode */
209 else if (c == '\n') /* Go one line down on a line-feed */
211 if (bm->penY + FONT_HEIGHT < bm->height)
213 bm->penY += FONT_HEIGHT;
219 text_putglyph(c, bm);
226 * Clear the screen and reset cursor position
228 void text_clear(struct Bitmap *bmp)
230 text_putchar('\x1b', bmp);
231 text_putchar('c', bmp);
236 * Set/clear algorithmic font style bits.
238 * \param flags Style flags to set
239 * \param mask Mask of flags to modify
240 * \return Old style flags
243 * Turn on bold, leave other styles alone
244 * \code prt_style(STYLEF_BOLD, STYLEF_BOLD); \endcode
246 * Turn off bold and turn on italic, leave others as they are
247 * \code prt_style(STYLEF_ITALIC, STYLEF_BOLD | STYLEF_ITALIC); \endcode
249 * Query current style without chaning it
250 * \code style = prt_style(0, 0); \endcode
252 * Reset all styles (plain text)
253 * \code prt_style(0, STYLE_MASK); \endcode
255 uint8_t text_style(uint8_t flags, uint8_t mask)
257 uint8_t old = text_styles;
258 text_styles = (text_styles & ~mask) | flags;