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-rw-r--r--firmware/drivers/lcd-h100.c915
1 files changed, 915 insertions, 0 deletions
diff --git a/firmware/drivers/lcd-h100.c b/firmware/drivers/lcd-h100.c
new file mode 100644
index 0000000000..df4ca42b10
--- /dev/null
+++ b/firmware/drivers/lcd-h100.c
@@ -0,0 +1,915 @@
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2004 by Linus Nielsen Feltzing
11 *
12 * All files in this archive are subject to the GNU General Public License.
13 * See the file COPYING in the source tree root for full license agreement.
14 *
15 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
16 * KIND, either express or implied.
17 *
18 ****************************************************************************/
19#include "config.h"
20
21#ifdef HAVE_LCD_BITMAP
22
23#include "cpu.h"
24#include "lcd.h"
25#include "kernel.h"
26#include "thread.h"
27#include <string.h>
28#include <stdlib.h>
29#include "file.h"
30#include "debug.h"
31#include "system.h"
32#include "font.h"
33
34/*** definitions ***/
35
36/* LCD command codes */
37#define LCD_CNTL_ON_OFF 0xae
38#define LCD_CNTL_OFF_MODE 0xbe
39#define LCD_CNTL_REVERSE 0xa6
40#define LCD_CNTL_ALL_LIGHTING 0xa4
41#define LCD_CNTL_COMMON_OUTPUT_STATUS 0xc4
42#define LCD_CNTL_COLUMN_ADDRESS_DIR 0xa0
43#define LCD_CNTL_NLINE_ON_OFF 0xe4
44#define LCD_CNTL_DISPLAY_MODE 0x66
45#define LCD_CNTL_ELECTRIC_VOLUME 0x81
46#define LCD_CNTL_DISPLAY_START_LINE 0x8a
47
48#define LCD_CNTL_PAGE 0xb1
49#define LCD_CNTL_COLUMN 0x13
50#define LCD_CNTL_DATA_WRITE 0x1d
51
52#define SCROLL_SPACING 3
53
54#define SCROLLABLE_LINES 13
55
56struct scrollinfo {
57 char line[MAX_PATH + LCD_WIDTH/2 + SCROLL_SPACING + 2];
58 int len; /* length of line in chars */
59 int width; /* length of line in pixels */
60 int offset;
61 int startx;
62 bool backward; /* scroll presently forward or backward? */
63 bool bidir;
64 bool invert; /* invert the scrolled text */
65 long start_tick;
66};
67
68static volatile int scrolling_lines=0; /* Bitpattern of which lines are scrolling */
69
70static void scroll_thread(void);
71static char scroll_stack[DEFAULT_STACK_SIZE];
72static const char scroll_name[] = "scroll";
73static char scroll_ticks = 12; /* # of ticks between updates*/
74static int scroll_delay = HZ/2; /* ticks delay before start */
75static char scroll_step = 6; /* pixels per scroll step */
76static int bidir_limit = 50; /* percent */
77static struct scrollinfo scroll[SCROLLABLE_LINES];
78static int xmargin = 0;
79static int ymargin = 0;
80static int curfont = FONT_SYSFIXED;
81#ifndef SIMULATOR
82static int xoffset = 0; /* needed for flip */
83#endif
84
85unsigned char lcd_framebuffer[LCD_HEIGHT/8][LCD_WIDTH];
86
87/* All zeros and ones bitmaps for area filling */
88static const unsigned char zeros[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
89static const unsigned char ones[8] = { 0xff, 0xff, 0xff, 0xff,
90 0xff, 0xff, 0xff, 0xff};
91
92int lcd_default_contrast(void)
93{
94 return 32;
95}
96
97#ifdef SIMULATOR
98
99void lcd_init(void)
100{
101 create_thread(scroll_thread, scroll_stack,
102 sizeof(scroll_stack), scroll_name);
103}
104
105#else
106
107/*
108 * Initialize LCD
109 */
110void lcd_init (void)
111{
112 /* GPO35 is the LCD A0 pin */
113 GPIO1_FUNCTION |= 0x00000008;
114 GPIO1_ENABLE |= 0x00000008;
115 GPIO1_OUT |= 0x00000008;
116
117 lcd_write_command(LCD_CNTL_ON_OFF | 1); /* LCD ON */
118 lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 0); /* Normal */
119 lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 1); /* Reverse dir */
120 lcd_write_command(LCD_CNTL_REVERSE | 0); /* Reverse OFF */
121 lcd_write_command(LCD_CNTL_ALL_LIGHTING | 0); /* Normal */
122 lcd_write_command(LCD_CNTL_OFF_MODE | 1); /* OFF -> VCC on drivers */
123 lcd_write_command(LCD_CNTL_NLINE_ON_OFF | 1); /* N-line ON */
124
125 lcd_write_command_ex(LCD_CNTL_DISPLAY_MODE, 1); /* Monochrome mode */
126
127 lcd_clear_display();
128 lcd_update();
129
130 create_thread(scroll_thread, scroll_stack,
131 sizeof(scroll_stack), scroll_name);
132}
133
134
135/* Performance function that works with an external buffer
136 note that y and height are in 8-pixel units! */
137void lcd_blit (const unsigned char* p_data, int x, int y, int width,
138 int height, int stride)
139{
140 /* Copy display bitmap to hardware */
141 while (height--)
142 {
143 lcd_write_command_ex(LCD_CNTL_PAGE, y++ & 0xf);
144 lcd_write_command_ex(LCD_CNTL_COLUMN, x+xoffset);
145
146 lcd_write_command(LCD_CNTL_DATA_WRITE);
147 lcd_write_data(p_data, width);
148 p_data += stride;
149 }
150}
151
152
153/*
154 * Update the display.
155 * This must be called after all other LCD functions that change the display.
156 */
157void lcd_update (void) __attribute__ ((section (".icode")));
158void lcd_update (void)
159{
160 int y;
161
162 /* Copy display bitmap to hardware */
163 for (y = 0; y < LCD_HEIGHT/8; y++)
164 {
165 lcd_write_command_ex(LCD_CNTL_PAGE, y);
166 lcd_write_command_ex(LCD_CNTL_COLUMN, 0);
167
168 lcd_write_command(LCD_CNTL_DATA_WRITE);
169 lcd_write_data (lcd_framebuffer[y], LCD_WIDTH);
170 }
171}
172
173/*
174 * Update a fraction of the display.
175 */
176void lcd_update_rect (int, int, int, int) __attribute__ ((section (".icode")));
177void lcd_update_rect (int x_start, int y,
178 int width, int height)
179{
180 int ymax;
181
182 /* The Y coordinates have to work on even 8 pixel rows */
183 ymax = (y + height-1)/8;
184 y /= 8;
185
186 if(x_start + width > LCD_WIDTH)
187 width = LCD_WIDTH - x_start;
188 if (width <= 0)
189 return; /* nothing left to do, 0 is harmful to lcd_write_data() */
190 if(ymax >= LCD_HEIGHT/8)
191 ymax = LCD_HEIGHT/8-1;
192
193 /* Copy specified rectange bitmap to hardware */
194 for (; y <= ymax; y++)
195 {
196 lcd_write_command_ex(LCD_CNTL_PAGE, y);
197 lcd_write_command_ex(LCD_CNTL_COLUMN, x_start+xoffset);
198
199 lcd_write_command(LCD_CNTL_DATA_WRITE);
200 lcd_write_data (&lcd_framebuffer[y][x_start], width);
201 }
202}
203
204void lcd_set_contrast(int val)
205{
206 lcd_write_command_ex(LCD_CNTL_ELECTRIC_VOLUME, val);
207}
208
209void lcd_set_invert_display(bool yesno)
210{
211 lcd_write_command(LCD_CNTL_REVERSE | (yesno?1:0));
212}
213
214/* turn the display upside down (call lcd_update() afterwards) */
215void lcd_set_flip(bool yesno)
216{
217 if (yesno)
218 {
219 lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 1);
220 lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 0);
221 xoffset = 160 - LCD_WIDTH; /* 160 colums minus the 160 we have */
222 }
223 else
224 {
225 lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 0);
226 lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 1);
227 xoffset = 0;
228 }
229}
230
231/**
232 * Rolls up the lcd display by the specified amount of lines.
233 * Lines that are rolled out over the top of the screen are
234 * rolled in from the bottom again. This is a hardware
235 * remapping only and all operations on the lcd are affected.
236 * ->
237 * @param int lines - The number of lines that are rolled.
238 * The value must be 0 <= pixels < LCD_HEIGHT.
239 */
240void lcd_roll(int lines)
241{
242 char data[2];
243
244 lines &= LCD_HEIGHT-1;
245 data[0] = lines & 0xff;
246 data[1] = lines >> 8;
247
248 lcd_write_command(LCD_CNTL_DISPLAY_START_LINE);
249 lcd_write_data(data, 2);
250}
251
252#endif /* SIMULATOR */
253
254void lcd_clear_display (void)
255{
256 memset (lcd_framebuffer, 0, sizeof lcd_framebuffer);
257 scrolling_lines = 0;
258}
259
260void lcd_setmargins(int x, int y)
261{
262 xmargin = x;
263 ymargin = y;
264}
265
266int lcd_getxmargin(void)
267{
268 return xmargin;
269}
270
271int lcd_getymargin(void)
272{
273 return ymargin;
274}
275
276void lcd_setfont(int newfont)
277{
278 curfont = newfont;
279}
280
281int lcd_getstringsize(const unsigned char *str, int *w, int *h)
282{
283 struct font* pf = font_get(curfont);
284 int ch;
285 int width = 0;
286
287 while((ch = *str++)) {
288 /* check input range*/
289 if (ch < pf->firstchar || ch >= pf->firstchar+pf->size)
290 ch = pf->defaultchar;
291 ch -= pf->firstchar;
292
293 /* get proportional width and glyph bits*/
294 width += pf->width? pf->width[ch]: pf->maxwidth;
295 }
296 if ( w )
297 *w = width;
298 if ( h )
299 *h = pf->height;
300 return width;
301}
302
303/* put a string at a given char position */
304void lcd_puts(int x, int y, const unsigned char *str)
305{
306 lcd_puts_style(x, y, str, STYLE_DEFAULT);
307}
308
309void lcd_puts_style(int x, int y, const unsigned char *str, int style)
310{
311 int xpos,ypos,w,h;
312
313#if defined(SIMULATOR) && defined(HAVE_LCD_CHARCELLS)
314 /* We make the simulator truncate the string if it reaches the right edge,
315 as otherwise it'll wrap. The real target doesn't wrap. */
316
317 char buffer[12];
318 if(strlen(str)+x > 11 ) {
319 strncpy(buffer, str, sizeof buffer);
320 buffer[11-x]=0;
321 str = buffer;
322 }
323 xmargin = 0;
324 ymargin = 8;
325#endif
326
327 /* make sure scrolling is turned off on the line we are updating */
328 scrolling_lines &= ~(1 << y);
329
330 if(!str || !str[0])
331 return;
332
333 lcd_getstringsize(str, &w, &h);
334 xpos = xmargin + x*w / strlen(str);
335 ypos = ymargin + y*h;
336 lcd_putsxy(xpos, ypos, str);
337 lcd_clearrect(xpos + w, ypos, LCD_WIDTH - (xpos + w), h);
338 if (style & STYLE_INVERT)
339 lcd_invertrect(xpos, ypos, LCD_WIDTH - xpos, h);
340
341#if defined(SIMULATOR) && defined(HAVE_LCD_CHARCELLS)
342 lcd_update();
343#endif
344}
345
346/* put a string at a given pixel position, skipping first ofs pixel columns */
347static void lcd_putsxyofs(int x, int y, int ofs, const unsigned char *str)
348{
349 int ch;
350 struct font* pf = font_get(curfont);
351
352 while ((ch = *str++) != '\0' && x < LCD_WIDTH)
353 {
354 int gwidth, width;
355
356 /* check input range */
357 if (ch < pf->firstchar || ch >= pf->firstchar+pf->size)
358 ch = pf->defaultchar;
359 ch -= pf->firstchar;
360
361 /* no partial-height drawing for now... */
362 if (y + pf->height > LCD_HEIGHT)
363 break;
364
365 /* get proportional width and glyph bits */
366 gwidth = pf->width ? pf->width[ch] : pf->maxwidth;
367 width = MIN (gwidth, LCD_WIDTH - x);
368
369 if (ofs != 0)
370 {
371 if (ofs > width)
372 {
373 ofs -= width;
374 continue;
375 }
376 width -= ofs;
377 }
378
379 if (width > 0)
380 {
381 unsigned int i;
382 const unsigned char* bits = pf->bits +
383 (pf->offset ? pf->offset[ch]
384 : ((pf->height + 7) / 8 * pf->maxwidth * ch));
385
386 if (ofs != 0)
387 {
388 for (i = 0; i < pf->height; i += 8)
389 {
390 lcd_bitmap (bits + ofs, x, y + i, width,
391 MIN(8, pf->height - i), true);
392 bits += gwidth;
393 }
394 }
395 else
396 lcd_bitmap ((unsigned char*) bits, x, y, gwidth,
397 pf->height, true);
398 x += width;
399 }
400 ofs = 0;
401 }
402}
403
404/* put a string at a given pixel position */
405void lcd_putsxy(int x, int y, const unsigned char *str)
406{
407 lcd_putsxyofs(x, y, 0, str);
408}
409
410/*
411 * About Rockbox' internal bitmap format:
412 *
413 * A bitmap contains one bit for every pixel that defines if that pixel is
414 * black (1) or white (0). Bits within a byte are arranged vertically, LSB
415 * at top.
416 * The bytes are stored in row-major order, with byte 0 being top left,
417 * byte 1 2nd from left etc. The first row of bytes defines pixel rows
418 * 0..7, the second row defines pixel row 8..15 etc.
419 *
420 * This is the same as the internal lcd hw format.
421 */
422
423/*
424 * Draw a bitmap at (x, y), size (nx, ny)
425 * if 'clear' is true, clear destination area first
426 */
427void lcd_bitmap (const unsigned char *src, int x, int y, int nx, int ny,
428 bool clear) __attribute__ ((section (".icode")));
429void lcd_bitmap (const unsigned char *src, int x, int y, int nx, int ny,
430 bool clear)
431{
432 const unsigned char *src_col;
433 unsigned char *dst, *dst_col;
434 unsigned int data, mask1, mask2, mask3, mask4;
435 int stride, shift;
436
437 if (((unsigned) x >= LCD_WIDTH) || ((unsigned) y >= LCD_HEIGHT))
438 return;
439
440 stride = nx; /* otherwise right-clipping will destroy the image */
441
442 if (((unsigned) (x + nx)) >= LCD_WIDTH)
443 nx = LCD_WIDTH - x;
444 if (((unsigned) (y + ny)) >= LCD_HEIGHT)
445 ny = LCD_HEIGHT - y;
446
447 dst = &lcd_framebuffer[y >> 3][x];
448 shift = y & 7;
449
450 if (!shift && clear) /* shortcut for byte aligned match with clear */
451 {
452 while (ny >= 8) /* all full rows */
453 {
454 memcpy(dst, src, nx);
455 src += stride;
456 dst += LCD_WIDTH;
457 ny -= 8;
458 }
459 if (ny == 0) /* nothing left to do? */
460 return;
461 /* last partial row to do by default routine */
462 }
463
464 ny += shift;
465
466 /* Calculate bit masks */
467 mask4 = ~(0xfe << ((ny-1) & 7)); /* data mask for last partial row */
468 if (clear)
469 {
470 mask1 = ~(0xff << shift); /* clearing of first partial row */
471 mask2 = 0; /* clearing of intermediate (full) rows */
472 mask3 = ~mask4; /* clearing of last partial row */
473 if (ny <= 8)
474 mask3 |= mask1;
475 }
476 else
477 mask1 = mask2 = mask3 = 0xff;
478
479 /* Loop for each column */
480 for (x = 0; x < nx; x++)
481 {
482 src_col = src++;
483 dst_col = dst++;
484 data = 0;
485 y = 0;
486
487 if (ny > 8)
488 {
489 /* First partial row */
490 data = *src_col << shift;
491 *dst_col = (*dst_col & mask1) | data;
492 src_col += stride;
493 dst_col += LCD_WIDTH;
494 data >>= 8;
495
496 /* Intermediate rows */
497 for (y = 8; y < ny-8; y += 8)
498 {
499 data |= *src_col << shift;
500 *dst_col = (*dst_col & mask2) | data;
501 src_col += stride;
502 dst_col += LCD_WIDTH;
503 data >>= 8;
504 }
505 }
506
507 /* Last partial row */
508 if (y + shift < ny)
509 data |= *src_col << shift;
510 *dst_col = (*dst_col & mask3) | (data & mask4);
511 }
512}
513
514/*
515 * Draw a rectangle with upper left corner at (x, y)
516 * and size (nx, ny)
517 */
518void lcd_drawrect (int x, int y, int nx, int ny)
519{
520 int i;
521
522 if (x > LCD_WIDTH)
523 return;
524 if (y > LCD_HEIGHT)
525 return;
526
527 if (x + nx > LCD_WIDTH)
528 nx = LCD_WIDTH - x;
529 if (y + ny > LCD_HEIGHT)
530 ny = LCD_HEIGHT - y;
531
532 /* vertical lines */
533 for (i = 0; i < ny; i++) {
534 DRAW_PIXEL(x, (y + i));
535 DRAW_PIXEL((x + nx - 1), (y + i));
536 }
537
538 /* horizontal lines */
539 for (i = 0; i < nx; i++) {
540 DRAW_PIXEL((x + i),y);
541 DRAW_PIXEL((x + i),(y + ny - 1));
542 }
543}
544
545/*
546 * Clear a rectangular area at (x, y), size (nx, ny)
547 */
548void lcd_clearrect (int x, int y, int nx, int ny)
549{
550 int i;
551 for (i = 0; i < nx; i++)
552 lcd_bitmap (zeros, x+i, y, 1, ny, true);
553}
554
555/*
556 * Fill a rectangular area at (x, y), size (nx, ny)
557 */
558void lcd_fillrect (int x, int y, int nx, int ny)
559{
560 int i;
561 for (i = 0; i < nx; i++)
562 lcd_bitmap (ones, x+i, y, 1, ny, true);
563}
564
565/* Invert a rectangular area at (x, y), size (nx, ny) */
566void lcd_invertrect (int x, int y, int nx, int ny)
567{
568 int i, j;
569
570 if (x > LCD_WIDTH)
571 return;
572 if (y > LCD_HEIGHT)
573 return;
574
575 if (x + nx > LCD_WIDTH)
576 nx = LCD_WIDTH - x;
577 if (y + ny > LCD_HEIGHT)
578 ny = LCD_HEIGHT - y;
579
580 for (i = 0; i < nx; i++)
581 for (j = 0; j < ny; j++)
582 INVERT_PIXEL((x + i), (y + j));
583}
584
585/* Reverse the invert setting of the scrolling line (if any) at given char
586 position. Setting will go into affect next time line scrolls. */
587void lcd_invertscroll(int x, int y)
588{
589 struct scrollinfo* s;
590
591 (void)x;
592
593 s = &scroll[y];
594 s->invert = !s->invert;
595}
596
597void lcd_drawline( int x1, int y1, int x2, int y2 )
598{
599 int numpixels;
600 int i;
601 int deltax, deltay;
602 int d, dinc1, dinc2;
603 int x, xinc1, xinc2;
604 int y, yinc1, yinc2;
605
606 deltax = abs(x2 - x1);
607 deltay = abs(y2 - y1);
608
609 if(deltax >= deltay)
610 {
611 numpixels = deltax;
612 d = 2 * deltay - deltax;
613 dinc1 = deltay * 2;
614 dinc2 = (deltay - deltax) * 2;
615 xinc1 = 1;
616 xinc2 = 1;
617 yinc1 = 0;
618 yinc2 = 1;
619 }
620 else
621 {
622 numpixels = deltay;
623 d = 2 * deltax - deltay;
624 dinc1 = deltax * 2;
625 dinc2 = (deltax - deltay) * 2;
626 xinc1 = 0;
627 xinc2 = 1;
628 yinc1 = 1;
629 yinc2 = 1;
630 }
631 numpixels++; /* include endpoints */
632
633 if(x1 > x2)
634 {
635 xinc1 = -xinc1;
636 xinc2 = -xinc2;
637 }
638
639 if(y1 > y2)
640 {
641 yinc1 = -yinc1;
642 yinc2 = -yinc2;
643 }
644
645 x = x1;
646 y = y1;
647
648 for(i=0; i<numpixels; i++)
649 {
650 DRAW_PIXEL(x,y);
651
652 if(d < 0)
653 {
654 d += dinc1;
655 x += xinc1;
656 y += yinc1;
657 }
658 else
659 {
660 d += dinc2;
661 x += xinc2;
662 y += yinc2;
663 }
664 }
665}
666
667void lcd_clearline( int x1, int y1, int x2, int y2 )
668{
669 int numpixels;
670 int i;
671 int deltax, deltay;
672 int d, dinc1, dinc2;
673 int x, xinc1, xinc2;
674 int y, yinc1, yinc2;
675
676 deltax = abs(x2 - x1);
677 deltay = abs(y2 - y1);
678
679 if(deltax >= deltay)
680 {
681 numpixels = deltax;
682 d = 2 * deltay - deltax;
683 dinc1 = deltay * 2;
684 dinc2 = (deltay - deltax) * 2;
685 xinc1 = 1;
686 xinc2 = 1;
687 yinc1 = 0;
688 yinc2 = 1;
689 }
690 else
691 {
692 numpixels = deltay;
693 d = 2 * deltax - deltay;
694 dinc1 = deltax * 2;
695 dinc2 = (deltax - deltay) * 2;
696 xinc1 = 0;
697 xinc2 = 1;
698 yinc1 = 1;
699 yinc2 = 1;
700 }
701 numpixels++; /* include endpoints */
702
703 if(x1 > x2)
704 {
705 xinc1 = -xinc1;
706 xinc2 = -xinc2;
707 }
708
709 if(y1 > y2)
710 {
711 yinc1 = -yinc1;
712 yinc2 = -yinc2;
713 }
714
715 x = x1;
716 y = y1;
717
718 for(i=0; i<numpixels; i++)
719 {
720 CLEAR_PIXEL(x,y);
721
722 if(d < 0)
723 {
724 d += dinc1;
725 x += xinc1;
726 y += yinc1;
727 }
728 else
729 {
730 d += dinc2;
731 x += xinc2;
732 y += yinc2;
733 }
734 }
735}
736
737/*
738 * Set a single pixel
739 */
740void lcd_drawpixel(int x, int y)
741{
742 DRAW_PIXEL(x,y);
743}
744
745/*
746 * Clear a single pixel
747 */
748void lcd_clearpixel(int x, int y)
749{
750 CLEAR_PIXEL(x,y);
751}
752
753/*
754 * Invert a single pixel
755 */
756void lcd_invertpixel(int x, int y)
757{
758 INVERT_PIXEL(x,y);
759}
760
761void lcd_puts_scroll(int x, int y, const unsigned char *string)
762{
763 lcd_puts_scroll_style(x, y, string, STYLE_DEFAULT);
764}
765
766void lcd_puts_scroll_style(int x, int y, const unsigned char *string, int style)
767{
768 struct scrollinfo* s;
769 int w, h;
770
771 s = &scroll[y];
772
773 s->start_tick = current_tick + scroll_delay;
774 s->invert = false;
775 if (style & STYLE_INVERT) {
776 s->invert = true;
777 lcd_puts_style(x,y,string,STYLE_INVERT);
778 }
779 else
780 lcd_puts(x,y,string);
781
782 lcd_getstringsize(string, &w, &h);
783
784 if (LCD_WIDTH - x * 8 - xmargin < w) {
785 /* prepare scroll line */
786 char *end;
787
788 memset(s->line, 0, sizeof s->line);
789 strcpy(s->line, string);
790
791 /* get width */
792 s->width = lcd_getstringsize(s->line, &w, &h);
793
794 /* scroll bidirectional or forward only depending on the string
795 width */
796 if ( bidir_limit ) {
797 s->bidir = s->width < (LCD_WIDTH - xmargin) *
798 (100 + bidir_limit) / 100;
799 }
800 else
801 s->bidir = false;
802
803 if (!s->bidir) { /* add spaces if scrolling in the round */
804 strcat(s->line, " ");
805 /* get new width incl. spaces */
806 s->width = lcd_getstringsize(s->line, &w, &h);
807 }
808
809 end = strchr(s->line, '\0');
810 strncpy(end, string, LCD_WIDTH/2);
811
812 s->len = strlen(string);
813 s->offset = 0;
814 s->startx = x;
815 s->backward = false;
816 scrolling_lines |= (1<<y);
817 }
818 else
819 /* force a bit switch-off since it doesn't scroll */
820 scrolling_lines &= ~(1<<y);
821}
822
823void lcd_stop_scroll(void)
824{
825 scrolling_lines=0;
826}
827
828static const char scroll_tick_table[16] = {
829 /* Hz values:
830 1, 1.25, 1.55, 2, 2.5, 3.12, 4, 5, 6.25, 8.33, 10, 12.5, 16.7, 20, 25, 33 */
831 100, 80, 64, 50, 40, 32, 25, 20, 16, 12, 10, 8, 6, 5, 4, 3
832};
833
834void lcd_scroll_speed(int speed)
835{
836 scroll_ticks = scroll_tick_table[speed];
837}
838
839void lcd_scroll_step(int step)
840{
841 scroll_step = step;
842}
843
844void lcd_scroll_delay(int ms)
845{
846 scroll_delay = ms / (HZ / 10);
847}
848
849void lcd_bidir_scroll(int percent)
850{
851 bidir_limit = percent;
852}
853static void scroll_thread(void)
854{
855 struct font* pf;
856 struct scrollinfo* s;
857 int index;
858 int xpos, ypos;
859
860 /* initialize scroll struct array */
861 scrolling_lines = 0;
862
863 while ( 1 ) {
864 for ( index = 0; index < SCROLLABLE_LINES; index++ ) {
865 /* really scroll? */
866 if ( !(scrolling_lines&(1<<index)) )
867 continue;
868
869 s = &scroll[index];
870
871 /* check pause */
872 if (TIME_BEFORE(current_tick, s->start_tick))
873 continue;
874
875 if (s->backward)
876 s->offset -= scroll_step;
877 else
878 s->offset += scroll_step;
879
880 pf = font_get(curfont);
881 xpos = xmargin + s->startx * s->width / s->len;
882 ypos = ymargin + index * pf->height;
883
884 if (s->bidir) { /* scroll bidirectional */
885 if (s->offset <= 0) {
886 /* at beginning of line */
887 s->offset = 0;
888 s->backward = false;
889 s->start_tick = current_tick + scroll_delay * 2;
890 }
891 if (s->offset >= s->width - (LCD_WIDTH - xpos)) {
892 /* at end of line */
893 s->offset = s->width - (LCD_WIDTH - xpos);
894 s->backward = true;
895 s->start_tick = current_tick + scroll_delay * 2;
896 }
897 }
898 else {
899 /* scroll forward the whole time */
900 if (s->offset >= s->width)
901 s->offset %= s->width;
902 }
903
904 lcd_clearrect(xpos, ypos, LCD_WIDTH - xpos, pf->height);
905 lcd_putsxyofs(xpos, ypos, s->offset, s->line);
906 if (s->invert)
907 lcd_invertrect(xpos, ypos, LCD_WIDTH - xpos, pf->height);
908 lcd_update_rect(xpos, ypos, LCD_WIDTH - xpos, pf->height);
909 }
910
911 sleep(scroll_ticks);
912 }
913}
914
915#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-23 14:25:43 +0000