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
  31 #ifndef LCDFN /* Not compiling for remote - define macros for main LCD. */
  32 #define LCDFN(fn) lcd_ ## fn
  33 #define FBFN(fn)  fb_ ## fn
  34 #define LCDM(ma) LCD_ ## ma
  35 #define LCDNAME "lcd_"
  36 #define MAIN_LCD
  37 #endif
  38
  39 #if defined(MAIN_LCD) && defined(HAVE_LCD_COLOR)
  40 /* Fill a rectangle with a gradient */
  41 static void lcd_gradient_rect(int x1, int x2, int y, unsigned h,
  42                               int num_lines, int cur_line)
  43 {
  44     int old_pattern = current_vp->fg_pattern;
  45     int step_mul;
  46     if (h == 0) return;
  47
  48     num_lines *= h;
  49     cur_line *= h;
  50     step_mul = (1 << 16) / (num_lines);
  51     int h_r = RGB_UNPACK_RED(current_vp->lss_pattern);
  52     int h_g = RGB_UNPACK_GREEN(current_vp->lss_pattern);
  53     int h_b = RGB_UNPACK_BLUE(current_vp->lss_pattern);
  54     int rstep = (h_r - RGB_UNPACK_RED(current_vp->lse_pattern)) * step_mul;
  55     int gstep = (h_g - RGB_UNPACK_GREEN(current_vp->lse_pattern)) * step_mul;
  56     int bstep = (h_b - RGB_UNPACK_BLUE(current_vp->lse_pattern)) * step_mul;
  57     h_r = (h_r << 16) + (1 << 15);
  58     h_g = (h_g << 16) + (1 << 15);
  59     h_b = (h_b << 16) + (1 << 15);
  60     if (cur_line)
  61     {
  62         h_r -= cur_line * rstep;
  63         h_g -= cur_line * gstep;
  64         h_b -= cur_line * bstep;
  65     }
  66     unsigned     count;
  67
  68     for(count = 0; count < h; count++) {
  69         current_vp->fg_pattern = LCD_RGBPACK(h_r >> 16, h_g >> 16, h_b >> 16);
  70         lcd_hline(x1, x2, y + count);
  71         h_r -= rstep;
  72         h_g -= gstep;
  73         h_b -= bstep;
  74     }
  75
  76     current_vp->fg_pattern = old_pattern;
  77 }
  78 #endif
  79
  80 /* put a string at a given pixel position, skipping first ofs pixel columns */
  81 static void LCDFN(putsxyofs)(int x, int y, int ofs, const unsigned char *str)
  82 {
  83     unsigned short ch;
  84     unsigned short *ucs;
  85     struct font* pf = font_get(current_vp->font);
  86
  87     ucs = bidi_l2v(str, 1);
  88
  89     while ((ch = *ucs++) != 0 && x < current_vp->width)
  90     {
  91         int width;
  92         const unsigned char *bits;
  93
  94         /* get proportional width and glyph bits */
  95         width = font_get_width(pf, ch);
  96
  97         if (ofs > width)
  98         {
  99             ofs -= width;
 100             continue;
 101         }
 102
 103         bits = font_get_bits(pf, ch);
 104
 105         LCDFN(mono_bitmap_part)(bits, ofs, 0, width, x, y, width - ofs,
 106                                 pf->height);
 107
 108         x += width - ofs;
 109         ofs = 0;
 110     }
 111 }
 112 /* put a string at a given pixel position */
 113 void LCDFN(putsxy)(int x, int y, const unsigned char *str)
 114 {
 115     LCDFN(putsxyofs)(x, y, 0, str);
 116 }
 117
 118 static void LCDFN(putsxyofs_style)(int xpos, int ypos,
 119                                    const unsigned char *str, int style,
 120                                    int w, int h, int offset)
 121 {
 122     int lastmode = current_vp->drawmode;
 123     int xrect = xpos + MAX(w - offset, 0);
 124 #if defined(MAIN_LCD) && defined(HAVE_LCD_COLOR)
 125     int oldfgcolor = current_vp->fg_pattern;
 126     int oldbgcolor = current_vp->bg_pattern;
 127     current_vp->drawmode = DRMODE_SOLID | ((style & STYLE_INVERT) ?
 128                                            DRMODE_INVERSEVID : 0);
 129     if (style & STYLE_COLORED) {
 130         if (current_vp->drawmode == DRMODE_SOLID)
 131             current_vp->fg_pattern = style & STYLE_COLOR_MASK;
 132         else
 133             current_vp->bg_pattern = style & STYLE_COLOR_MASK;
 134     }
 135     current_vp->drawmode ^= DRMODE_INVERSEVID;
 136     if (style & STYLE_GRADIENT) {
 137         current_vp->drawmode = DRMODE_FG;
 138         lcd_gradient_rect(xpos, current_vp->width, ypos, h,
 139                           NUMLN_UNPACK(style), CURLN_UNPACK(style));
 140         current_vp->fg_pattern = current_vp->lst_pattern;
 141     }
 142     else if (style & STYLE_COLORBAR) {
 143         current_vp->drawmode = DRMODE_FG;
 144         current_vp->fg_pattern = current_vp->lss_pattern;
 145         lcd_fillrect(xpos, ypos, current_vp->width - xpos, h);
 146         current_vp->fg_pattern = current_vp->lst_pattern;
 147     }
 148     else {
 149         lcd_fillrect(xrect, ypos, current_vp->width - xrect, h);
 150         current_vp->drawmode = (style & STYLE_INVERT) ?
 151         (DRMODE_SOLID|DRMODE_INVERSEVID) : DRMODE_SOLID;
 152     }
 153     lcd_putsxyofs(xpos, ypos, offset, str);
 154     current_vp->fg_pattern = oldfgcolor;
 155     current_vp->bg_pattern = oldbgcolor;
 156 #else
 157     current_vp->drawmode = DRMODE_SOLID | ((style & STYLE_INVERT) ?
 158                                            0 : DRMODE_INVERSEVID);
 159     LCDFN(fillrect)(xrect, ypos, current_vp->width - xrect, h);
 160     current_vp->drawmode ^= DRMODE_INVERSEVID;
 161     LCDFN(putsxyofs)(xpos, ypos, offset, str);
 162 #endif
 163     current_vp->drawmode = lastmode;
 164 }
 165
 166 /*** Line oriented text output ***/
 167
 168 /* put a string at a given char position */
 169 void LCDFN(puts_style_offset)(int x, int y, const unsigned char *str,
 170                               int style, int offset)
 171 {
 172     int xpos, ypos, w, h;
 173     LCDFN(scroll_stop_line)(current_vp, y);
 174     if(!str || !str[0])
 175         return;
 176     LCDFN(getstringsize)(str, &w, &h);
 177     xpos = x * w / utf8length((char *)str);
 178     ypos = y * h;
 179     LCDFN(putsxyofs_style)(xpos, ypos, str, style, w, h, offset);
 180 }
 181
 182 void LCDFN(puts)(int x, int y, const unsigned char *str)
 183 {
 184     LCDFN(puts_style_offset)(x, y, str, STYLE_DEFAULT, 0);
 185 }
 186
 187 void LCDFN(puts_style)(int x, int y, const unsigned char *str, int style)
 188 {
 189     LCDFN(puts_style_offset)(x, y, str, style, 0);
 190 }
 191
 192 void LCDFN(puts_offset)(int x, int y, const unsigned char *str, int offset)
 193 {
 194     LCDFN(puts_style_offset)(x, y, str, STYLE_DEFAULT, offset);
 195 }
 196
 197 /*** scrolling ***/
 198
 199 void LCDFN(puts_scroll_style_offset)(int x, int y, const unsigned char *string,
 200                                      int style, int offset)
 201 {
 202     int w, h;
 203
 204     if ((unsigned)y >= (unsigned)current_vp->height)
 205         return;
 206
 207     /* remove any previously scrolling line at the same location */
 208     lcd_scroll_stop_line(current_vp, y);
 209
 210     if (LCDFN(scroll_info.lines) >= LCDM(SCROLLABLE_LINES)) return;
 211     if (!string)
 212         return;
 213     LCDFN(puts_style_offset)(x, y, string, style, offset);
 214
 215     LCDFN(getstringsize)(string, &w, &h);
 216
 217     if (current_vp->width - x * 8 < w) {
 218         /* prepare scroll line */
 219         struct scrollinfo* s;
 220         s = &LCDFN(scroll_info).scroll[LCDFN(scroll_info).lines];
 221         s->start_tick = current_tick + LCDFN(scroll_info).delay;
 222         s->style = style;
 223
 224         char *end;
 225
 226         memset(s->line, 0, sizeof s->line);
 227         strcpy(s->line, string);
 228
 229         /* get width */
 230         s->width = LCDFN(getstringsize)(s->line, &w, &h);
 231
 232         /* scroll bidirectional or forward only depending on the string
 233            width */
 234         if ( LCDFN(scroll_info).bidir_limit ) {
 235             s->bidir = s->width < (current_vp->width) *
 236                 (100 + LCDFN(scroll_info).bidir_limit) / 100;
 237         }
 238         else
 239             s->bidir = false;
 240
 241         if (!s->bidir) { /* add spaces if scrolling in the round */
 242             strcat(s->line, "   ");
 243             /* get new width incl. spaces */
 244             s->width = LCDFN(getstringsize)(s->line, &w, &h);
 245         }
 246
 247         end = strchr(s->line, '\0');
 248         strlcpy(end, string, current_vp->width/2);
 249
 250         s->vp = current_vp;
 251         s->y = y;
 252         s->len = utf8length(string);
 253         s->offset = offset;
 254         s->startx = x * s->width / s->len;
 255         s->backward = false;
 256
 257         LCDFN(scroll_info).lines++;
 258     }
 259 }
 260
 261 void LCDFN(puts_scroll)(int x, int y, const unsigned char *string)
 262 {
 263     LCDFN(puts_scroll_style)(x, y, string, STYLE_DEFAULT);
 264 }
 265
 266 void LCDFN(puts_scroll_style)(int x, int y, const unsigned char *string,
 267                               int style)
 268 {
 269      LCDFN(puts_scroll_style_offset)(x, y, string, style, 0);
 270 }
 271
 272 void LCDFN(puts_scroll_offset)(int x, int y, const unsigned char *string,
 273                                int offset)
 274 {
 275      LCDFN(puts_scroll_style_offset)(x, y, string, STYLE_DEFAULT, offset);
 276 }
 277
 278 void LCDFN(scroll_fn)(void)
 279 {
 280     struct font* pf;
 281     struct scrollinfo* s;
 282     int index;
 283     int xpos, ypos;
 284     struct viewport* old_vp = current_vp;
 285
 286     for ( index = 0; index < LCDFN(scroll_info).lines; index++ ) {
 287         s = &LCDFN(scroll_info).scroll[index];
 288
 289         /* check pause */
 290         if (TIME_BEFORE(current_tick, s->start_tick))
 291             continue;
 292
 293         LCDFN(set_viewport)(s->vp);
 294
 295         if (s->backward)
 296             s->offset -= LCDFN(scroll_info).step;
 297         else
 298             s->offset += LCDFN(scroll_info).step;
 299
 300         pf = font_get(current_vp->font);
 301         xpos = s->startx;
 302         ypos = s->y * pf->height;
 303
 304         if (s->bidir) { /* scroll bidirectional */
 305             if (s->offset <= 0) {
 306                 /* at beginning of line */
 307                 s->offset = 0;
 308                 s->backward = false;
 309                 s->start_tick = current_tick + LCDFN(scroll_info).delay * 2;
 310             }
 311             if (s->offset >= s->width - (current_vp->width - xpos)) {
 312                 /* at end of line */
 313                 s->offset = s->width - (current_vp->width - xpos);
 314                 s->backward = true;
 315                 s->start_tick = current_tick + LCDFN(scroll_info).delay * 2;
 316             }
 317         }
 318         else {
 319             /* scroll forward the whole time */
 320             if (s->offset >= s->width)
 321                 s->offset %= s->width;
 322         }
 323         LCDFN(putsxyofs_style)(xpos, ypos, s->line, s->style, s->width,
 324                                pf->height, s->offset);
 325         LCDFN(update_viewport_rect)(xpos, ypos, current_vp->width - xpos,
 326                                     pf->height);
 327     }
 328     LCDFN(set_viewport)(old_vp);
 329 }