firmware/drivers/lcd-bitmap-common.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 Dave Chapman
  11  *     Text rendering
  12  * Copyright (C) 2006 Shachar Liberman
  13  *     Offset text, scrolling
  14  * Copyright (C) 2007 Nicolas Pennequin, Tom Ross, Ken Fazzone, Akio Idehara
  15  *     Color gradient background
  16  * Copyright (C) 2009 Andrew Mahone
  17  *     Merged common LCD bitmap code
  18  *
  19  * Rockbox common bitmap LCD functions
  20  *
  21  * This program is free software; you can redistribute it and/or
  22  * modify it under the terms of the GNU General Public License
  23  * as published by the Free Software Foundation; either version 2
  24  * of the License, or (at your option) any later version.
  25  *
  26  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  27  * KIND, either express or implied.
  28  *
  29  ****************************************************************************/
  30 #include <stdarg.h>
  31 #include <stdio.h>
  32 #include "string-extra.h"
  33 #include "diacritic.h"
  34
  35 #ifndef LCDFN /* Not compiling for remote - define macros for main LCD. */
  36 #define LCDFN(fn) lcd_ ## fn
  37 #define FBFN(fn)  fb_ ## fn
  38 #define LCDM(ma) LCD_ ## ma
  39 #define LCDNAME "lcd_"
  40 #define MAIN_LCD
  41 #endif
  42
  43 #if defined(MAIN_LCD) && defined(HAVE_LCD_COLOR)
  44 /* Fill a rectangle with a gradient */
  45 static void lcd_gradient_rect(int x1, int x2, int y, unsigned h,
  46                               int num_lines, int cur_line)
  47 {
  48     int old_pattern = current_vp->fg_pattern;
  49     int step_mul;
  50     if (h == 0) return;
  51
  52     num_lines *= h;
  53     cur_line *= h;
  54     step_mul = (1 << 16) / (num_lines);
  55     int h_r = RGB_UNPACK_RED(current_vp->lss_pattern);
  56     int h_g = RGB_UNPACK_GREEN(current_vp->lss_pattern);
  57     int h_b = RGB_UNPACK_BLUE(current_vp->lss_pattern);
  58     int rstep = (h_r - RGB_UNPACK_RED(current_vp->lse_pattern)) * step_mul;
  59     int gstep = (h_g - RGB_UNPACK_GREEN(current_vp->lse_pattern)) * step_mul;
  60     int bstep = (h_b - RGB_UNPACK_BLUE(current_vp->lse_pattern)) * step_mul;
  61     h_r = (h_r << 16) + (1 << 15);
  62     h_g = (h_g << 16) + (1 << 15);
  63     h_b = (h_b << 16) + (1 << 15);
  64     if (cur_line)
  65     {
  66         h_r -= cur_line * rstep;
  67         h_g -= cur_line * gstep;
  68         h_b -= cur_line * bstep;
  69     }
  70     unsigned     count;
  71
  72     for(count = 0; count < h; count++) {
  73         current_vp->fg_pattern = LCD_RGBPACK(h_r >> 16, h_g >> 16, h_b >> 16);
  74         lcd_hline(x1, x2, y + count);
  75         h_r -= rstep;
  76         h_g -= gstep;
  77         h_b -= bstep;
  78     }
  79
  80     current_vp->fg_pattern = old_pattern;
  81 }
  82 #endif
  83
  84 /*
  85  * draws the borders of the current viewport
  86  **/
  87 void LCDFN(draw_border_viewport)(void)
  88 {
  89     LCDFN(drawrect)(0, 0, current_vp->width, current_vp->height);
  90 }
  91
  92 /*
  93  * fills the rectangle formed by current_vp
  94  **/
  95 void LCDFN(fill_viewport)(void)
  96 {
  97     LCDFN(fillrect)(0, 0, current_vp->width, current_vp->height);
  98 }
  99
 100 /* put a string at a given pixel position, skipping first ofs pixel columns */
 101 static void LCDFN(putsxyofs)(int x, int y, int ofs, const unsigned char *str)
 102 {
 103     unsigned short *ucs;
 104     struct font* pf = font_get(current_vp->font);
 105     int vp_flags = current_vp->flags;
 106     int rtl_next_non_diac_width, last_non_diacritic_width;
 107
 108     if ((vp_flags & VP_FLAG_ALIGNMENT_MASK) != 0)
 109     {
 110         int w;
 111
 112         LCDFN(getstringsize)(str, &w, NULL);
 113         /* center takes precedence */
 114         if (vp_flags & VP_FLAG_ALIGN_CENTER)
 115         {
 116             x = ((current_vp->width - w)/ 2) + x;
 117             if (x < 0)
 118                 x = 0;
 119         }
 120         else
 121         {
 122             x = current_vp->width - w - x;
 123             x += ofs;
 124             ofs = 0;
 125         }
 126     }
 127
 128     rtl_next_non_diac_width = 0;
 129     last_non_diacritic_width = 0;
 130     /* Mark diacritic and rtl flags for each character */
 131     for (ucs = bidi_l2v(str, 1); *ucs; ucs++)
 132     {
 133         bool is_rtl, is_diac;
 134         const unsigned char *bits;
 135         int width, base_width, drawmode = 0, base_ofs = 0;
 136         const unsigned short next_ch = ucs[1];
 137
 138         if (x >= current_vp->width)
 139             break;
 140
 141         is_diac = is_diacritic(*ucs, &is_rtl);
 142
 143         /* Get proportional width and glyph bits */
 144         width = font_get_width(pf, *ucs);
 145
 146         /* Calculate base width */
 147         if (is_rtl)
 148         {
 149             /* Forward-seek the next non-diacritic character for base width */
 150             if (is_diac)
 151             {
 152                 if (!rtl_next_non_diac_width)
 153                 {
 154                     const unsigned short *u;
 155
 156                     /* Jump to next non-diacritic char, and calc its width */
 157                     for (u = &ucs[1]; *u && is_diacritic(*u, NULL); u++);
 158
 159                     rtl_next_non_diac_width = *u ?  font_get_width(pf, *u) : 0;
 160                 }
 161                 base_width = rtl_next_non_diac_width;
 162             }
 163             else
 164             {
 165                 rtl_next_non_diac_width = 0; /* Mark */
 166                 base_width = width;
 167             }
 168         }
 169         else
 170         {
 171             if (!is_diac)
 172                 last_non_diacritic_width = width;
 173
 174             base_width = last_non_diacritic_width;
 175         }
 176
 177         if (ofs > width)
 178         {
 179             ofs -= width;
 180             continue;
 181         }
 182
 183         if (is_diac)
 184         {
 185             /* XXX: Suggested by amiconn:
 186              * This will produce completely wrong results if the original
 187              * drawmode is DRMODE_COMPLEMENT. We need to pre-render the current
 188              * character with all its diacritics at least (in mono) and then
 189              * finally draw that. And we'll need an extra buffer that can hold
 190              * one char's bitmap. Basically we can't just change the draw mode
 191              * to something else irrespective of the original mode and expect
 192              * the result to look as intended and with DRMODE_COMPLEMENT (which
 193              * means XORing pixels), overdrawing this way will cause odd results
 194              * if the diacritics and the base char both have common pixels set.
 195              * So we need to combine the char and its diacritics in a temp
 196              * buffer using OR, and then draw the final bitmap instead of the
 197              * chars, without touching the drawmode
 198              **/
 199             drawmode = current_vp->drawmode;
 200             current_vp->drawmode = DRMODE_FG;
 201
 202             base_ofs = (base_width - width) / 2;
 203         }
 204
 205         bits = font_get_bits(pf, *ucs);
 206
 207 #if defined(MAIN_LCD) && defined(HAVE_LCD_COLOR)
 208         if (pf->depth)
 209             lcd_alpha_bitmap_part(bits, ofs, 0, width, x + base_ofs, y,
 210                                   width - ofs, pf->height);
 211         else
 212 #endif
 213             LCDFN(mono_bitmap_part)(bits, ofs, 0, width, x + base_ofs,
 214                                     y, width - ofs, pf->height);
 215         if (is_diac)
 216         {
 217             current_vp->drawmode = drawmode;
 218         }
 219
 220         if (next_ch)
 221         {
 222             bool next_is_rtl;
 223             bool next_is_diacritic = is_diacritic(next_ch, &next_is_rtl);
 224
 225             /* Increment if:
 226              *  LTR: Next char is not diacritic,
 227              *  RTL: Current char is non-diacritic and next char is diacritic */
 228             if ((is_rtl && !is_diac) ||
 229                     (!is_rtl && (!next_is_diacritic || next_is_rtl)))
 230             {
 231                 x += base_width - ofs;
 232                 ofs = 0;
 233             }
 234         }
 235     }
 236 }
 237
 238 /* put a string at a given pixel position */
 239 void LCDFN(putsxy)(int x, int y, const unsigned char *str)
 240 {
 241     LCDFN(putsxyofs)(x, y, 0, str);
 242 }
 243
 244 /* Formatting version of LCDFN(putsxy) */
 245 void LCDFN(putsxyf)(int x, int y, const unsigned char *fmt, ...)
 246 {
 247     va_list ap;
 248     char buf[256];
 249     va_start(ap, fmt);
 250     vsnprintf(buf, sizeof (buf), fmt, ap);
 251     va_end(ap);
 252     LCDFN(putsxy)(x, y, buf);
 253 }
 254
 255 static void LCDFN(putsxyofs_style)(int xpos, int ypos,
 256                                    const unsigned char *str, int style,
 257                                    int w, int h, int offset)
 258 {
 259     int lastmode = current_vp->drawmode;
 260     int xrect = xpos + MAX(w - offset, 0);
 261     int x = VP_IS_RTL(current_vp) ? xpos : xrect;
 262 #if defined(MAIN_LCD) && defined(HAVE_LCD_COLOR)
 263     int oldfgcolor = current_vp->fg_pattern;
 264     int oldbgcolor = current_vp->bg_pattern;
 265     current_vp->drawmode = DRMODE_SOLID | ((style & STYLE_INVERT) ?
 266                                            DRMODE_INVERSEVID : 0);
 267     if (style & STYLE_COLORED) {
 268         if (current_vp->drawmode == DRMODE_SOLID)
 269             current_vp->fg_pattern = style & STYLE_COLOR_MASK;
 270         else
 271             current_vp->bg_pattern = style & STYLE_COLOR_MASK;
 272     }
 273     current_vp->drawmode ^= DRMODE_INVERSEVID;
 274     if (style & STYLE_GRADIENT) {
 275         current_vp->drawmode = DRMODE_FG;
 276         lcd_gradient_rect(xpos, current_vp->width, ypos, h,
 277                           NUMLN_UNPACK(style), CURLN_UNPACK(style));
 278         current_vp->fg_pattern = current_vp->lst_pattern;
 279     }
 280     else if (style & STYLE_COLORBAR) {
 281         current_vp->drawmode = DRMODE_FG;
 282         current_vp->fg_pattern = current_vp->lss_pattern;
 283         lcd_fillrect(xpos, ypos, current_vp->width - xpos, h);
 284         current_vp->fg_pattern = current_vp->lst_pattern;
 285     }
 286     else {
 287         lcd_fillrect(x, ypos, current_vp->width - xrect, h);
 288         current_vp->drawmode = (style & STYLE_INVERT) ?
 289         (DRMODE_SOLID|DRMODE_INVERSEVID) : DRMODE_SOLID;
 290     }
 291     if (str[0])
 292         lcd_putsxyofs(xpos, ypos, offset, str);
 293     current_vp->fg_pattern = oldfgcolor;
 294     current_vp->bg_pattern = oldbgcolor;
 295 #else
 296     current_vp->drawmode = DRMODE_SOLID | ((style & STYLE_INVERT) ?
 297                                            0 : DRMODE_INVERSEVID);
 298     LCDFN(fillrect)(x, ypos, current_vp->width - xrect, h);
 299     current_vp->drawmode ^= DRMODE_INVERSEVID;
 300     if (str[0])
 301         LCDFN(putsxyofs)(xpos, ypos, offset, str);
 302 #endif
 303     current_vp->drawmode = lastmode;
 304 }
 305
 306 /*** Line oriented text output ***/
 307
 308 /* put a string at a given char position */
 309 void LCDFN(puts_style_xyoffset)(int x, int y, const unsigned char *str,
 310                               int style, int x_offset, int y_offset)
 311 {
 312     int xpos, ypos, w, h;
 313     LCDFN(scroll_stop_line)(current_vp, y);
 314     if(!str)
 315         return;
 316
 317     LCDFN(getstringsize)(str, &w, &h);
 318     xpos = x * LCDFN(getstringsize)(" ", NULL, NULL);
 319     ypos = y * h + y_offset;
 320     LCDFN(putsxyofs_style)(xpos, ypos, str, style, w, h, x_offset);
 321 }
 322
 323 void LCDFN(puts_style_offset)(int x, int y, const unsigned char *str,
 324                               int style, int x_offset)
 325 {
 326     LCDFN(puts_style_xyoffset)(x, y, str, style, x_offset, 0);
 327 }
 328
 329 void LCDFN(puts)(int x, int y, const unsigned char *str)
 330 {
 331     LCDFN(puts_style_offset)(x, y, str, STYLE_DEFAULT, 0);
 332 }
 333
 334 /* Formatting version of LCDFN(puts) */
 335 void LCDFN(putsf)(int x, int y, const unsigned char *fmt, ...)
 336 {
 337     va_list ap;
 338     char buf[256];
 339     va_start(ap, fmt);
 340     vsnprintf(buf, sizeof (buf), fmt, ap);
 341     va_end(ap);
 342     LCDFN(puts)(x, y, buf);
 343 }
 344
 345 void LCDFN(puts_style)(int x, int y, const unsigned char *str, int style)
 346 {
 347     LCDFN(puts_style_offset)(x, y, str, style, 0);
 348 }
 349
 350 void LCDFN(puts_offset)(int x, int y, const unsigned char *str, int offset)
 351 {
 352     LCDFN(puts_style_offset)(x, y, str, STYLE_DEFAULT, offset);
 353 }
 354
 355 /*** scrolling ***/
 356
 357 void LCDFN(puts_scroll_style_xyoffset)(int x, int y, const unsigned char *string,
 358                                      int style, int x_offset, int y_offset)
 359 {
 360     struct scrollinfo* s;
 361     char *end;
 362     int w, h;
 363     int len;
 364
 365     if ((unsigned)y >= (unsigned)current_vp->height)
 366         return;
 367
 368     /* remove any previously scrolling line at the same location */
 369     LCDFN(scroll_stop_line)(current_vp, y);
 370
 371     if (LCDFN(scroll_info).lines >= LCDM(SCROLLABLE_LINES)) return;
 372     if (!string)
 373         return;
 374     LCDFN(puts_style_xyoffset)(x, y, string, style, x_offset, y_offset);
 375
 376     LCDFN(getstringsize)(string, &w, &h);
 377
 378     if (current_vp->width - x * 8 >= w)
 379         return;
 380
 381     /* prepare scroll line */
 382     s = &LCDFN(scroll_info).scroll[LCDFN(scroll_info).lines];
 383     s->start_tick = current_tick + LCDFN(scroll_info).delay;
 384     s->style = style;
 385
 386     strlcpy(s->line, string, sizeof s->line);
 387
 388     /* get width */
 389     s->width = LCDFN(getstringsize)(s->line, &w, &h);
 390
 391     /* scroll bidirectional or forward only depending on the string
 392        width */
 393     if ( LCDFN(scroll_info).bidir_limit ) {
 394         s->bidir = s->width < (current_vp->width) *
 395             (100 + LCDFN(scroll_info).bidir_limit) / 100;
 396     }
 397     else
 398         s->bidir = false;
 399
 400     if (!s->bidir) { /* add spaces if scrolling in the round */
 401         strlcat(s->line, "   ", sizeof s->line);
 402         /* get new width incl. spaces */
 403         s->width = LCDFN(getstringsize)(s->line, &w, &h);
 404     }
 405
 406     end = strchr(s->line, '\0');
 407     len = sizeof s->line - (end - s->line);
 408     strlcpy(end, string, MIN(current_vp->width/2, len));
 409
 410     s->vp = current_vp;
 411     s->y = y;
 412     s->offset = x_offset;
 413     s->startx = x * LCDFN(getstringsize)(" ", NULL, NULL);
 414     s->y_offset = y_offset;
 415     s->backward = false;
 416
 417     LCDFN(scroll_info).lines++;
 418 }
 419
 420 void LCDFN(puts_scroll)(int x, int y, const unsigned char *string)
 421 {
 422     LCDFN(puts_scroll_style)(x, y, string, STYLE_DEFAULT);
 423 }
 424
 425 void LCDFN(puts_scroll_style)(int x, int y, const unsigned char *string,
 426                               int style)
 427 {
 428      LCDFN(puts_scroll_style_offset)(x, y, string, style, 0);
 429 }
 430
 431 void LCDFN(puts_scroll_offset)(int x, int y, const unsigned char *string,
 432                                int offset)
 433 {
 434      LCDFN(puts_scroll_style_offset)(x, y, string, STYLE_DEFAULT, offset);
 435 }
 436
 437 void LCDFN(scroll_fn)(void)
 438 {
 439     struct font* pf;
 440     struct scrollinfo* s;
 441     int index;
 442     int xpos, ypos;
 443     struct viewport* old_vp = current_vp;
 444     bool makedelay;
 445
 446     for ( index = 0; index < LCDFN(scroll_info).lines; index++ ) {
 447         s = &LCDFN(scroll_info).scroll[index];
 448
 449         /* check pause */
 450         if (TIME_BEFORE(current_tick, s->start_tick))
 451             continue;
 452
 453         LCDFN(set_viewport)(s->vp);
 454
 455         if (s->backward)
 456             s->offset -= LCDFN(scroll_info).step;
 457         else
 458             s->offset += LCDFN(scroll_info).step;
 459
 460         pf = font_get(current_vp->font);
 461         xpos = s->startx;
 462         ypos = s->y * pf->height + s->y_offset;
 463
 464         makedelay = false;
 465         if (s->bidir) { /* scroll bidirectional */
 466             if (s->offset <= 0) {
 467                 /* at beginning of line */
 468                 s->offset = 0;
 469                 s->backward = false;
 470                 makedelay = true;
 471             }
 472             else if (s->offset >= s->width - (current_vp->width - xpos)) {
 473                 /* at end of line */
 474                 s->offset = s->width - (current_vp->width - xpos);
 475                 s->backward = true;
 476                 makedelay = true;
 477             }
 478         }
 479         else {
 480             /* scroll forward the whole time */
 481             if (s->offset >= s->width) {
 482                 s->offset = 0;
 483                 makedelay = true;
 484             }
 485         }
 486
 487         if (makedelay)
 488             s->start_tick = current_tick + LCDFN(scroll_info).delay +
 489                     LCDFN(scroll_info).ticks;
 490
 491         LCDFN(putsxyofs_style)(xpos, ypos, s->line, s->style, s->width,
 492                                pf->height, s->offset);
 493         LCDFN(update_viewport_rect)(xpos, ypos, current_vp->width - xpos,
 494                                pf->height);
 495     }
 496     LCDFN(set_viewport)(old_vp);
 497 }
 498
 499 void LCDFN(puts_scroll_style_offset)(int x, int y, const unsigned char *string,
 500                                      int style, int x_offset)
 501 {
 502     LCDFN(puts_scroll_style_xyoffset)(x, y, string, style, x_offset, 0);
 503 }