apps/plugins/lib/grey_parm.c

   1 /***************************************************************************
   2 *             __________               __   ___.
   3 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7 *                     \/            \/     \/    \/            \/
   8 * $Id$
   9 *
  10 * New greyscale framework
  11 * Parameter handling
  12 *
  13 * This is a generic framework to display 129 shades of grey on low-depth
  14 * bitmap LCDs (Archos b&w, Iriver & Ipod 4-grey) within plugins.
  15 *
  16 * Copyright (C) 2008 Jens Arnold
  17 *
  18 * All files in this archive are subject to the GNU General Public License.
  19 * See the file COPYING in the source tree root for full license agreement.
  20 *
  21 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  22 * KIND, either express or implied.
  23 *
  24 ****************************************************************************/
  25
  26 #include "plugin.h"
  27 #include "grey.h"
  28
  29 /* Set position of the top left corner of the greyscale overlay
  30    Note that depending on the target LCD, either x or y gets rounded
  31    to the nearest multiple of 4 or 8 */
  32 void grey_set_position(int x, int y)
  33 {
  34 #if LCD_PIXELFORMAT == HORIZONTAL_PACKING
  35     _grey_info.bx = (x + 4) >> 3;
  36     x = 8 * _grey_info.bx;
  37 #else /* vertical packing or vertical interleaved */
  38 #if (LCD_DEPTH == 1) || (LCD_PIXELFORMAT == VERTICAL_INTERLEAVED)
  39     _grey_info.by = (y + 4) >> 3;
  40     y = 8 * _grey_info.by;
  41 #elif LCD_DEPTH == 2
  42     _grey_info.by = (y + 2) >> 2;
  43     y = 4 * _grey_info.by;
  44 #endif
  45 #endif /* LCD_PIXELFORMAT */
  46     _grey_info.x = x;
  47     _grey_info.y = y;
  48
  49     if (_grey_info.flags & _GREY_RUNNING)
  50     {
  51 #ifdef SIMULATOR
  52         _grey_info.rb->sim_lcd_ex_update_rect(_grey_info.x, _grey_info.y,
  53                                               _grey_info.width,
  54                                               _grey_info.height);
  55         grey_deferred_lcd_update();
  56 #else
  57         _grey_info.flags |= _GREY_DEFERRED_UPDATE;
  58 #endif
  59     }
  60 }
  61
  62 /* Set the draw mode for subsequent drawing operations */
  63 void grey_set_drawmode(int mode)
  64 {
  65     _grey_info.drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
  66 }
  67
  68 /* Return the current draw mode */
  69 int  grey_get_drawmode(void)
  70 {
  71     return _grey_info.drawmode;
  72 }
  73
  74 /* Set the foreground shade for subsequent drawing operations */
  75 void grey_set_foreground(unsigned brightness)
  76 {
  77     _grey_info.fg_brightness = brightness;
  78 }
  79
  80 /* Return the current foreground shade */
  81 unsigned grey_get_foreground(void)
  82 {
  83     return _grey_info.fg_brightness;
  84 }
  85
  86 /* Set the background shade for subsequent drawing operations */
  87 void grey_set_background(unsigned brightness)
  88 {
  89     _grey_info.bg_brightness = brightness;
  90 }
  91
  92 /* Return the current background shade */
  93 unsigned grey_get_background(void)
  94 {
  95     return _grey_info.bg_brightness;
  96 }
  97
  98 /* Set draw mode, foreground and background shades at once */
  99 void grey_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness)
 100 {
 101     grey_set_drawmode(mode);
 102     grey_set_foreground(fg_brightness);
 103     grey_set_background(bg_brightness);
 104 }
 105
 106 /* Set font for the text output routines */
 107 void grey_setfont(int newfont)
 108 {
 109     _grey_info.curfont = newfont;
 110 }
 111
 112 /* Get width and height of a text when printed with the current font */
 113 int  grey_getstringsize(const unsigned char *str, int *w, int *h)
 114 {
 115     return _grey_info.rb->font_getstringsize(str, w, h, _grey_info.curfont);
 116 }