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 * This program is free software; you can redistribute it and/or
  19 * modify it under the terms of the GNU General Public License
  20 * as published by the Free Software Foundation; either version 2
  21 * of the License, or (at your option) any later version.
  22 *
  23 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  24 * KIND, either express or implied.
  25 *
  26 ****************************************************************************/
  27
  28 #include "plugin.h"
  29 #include "grey.h"
  30
  31 /* Set position of the top left corner of the greyscale overlay
  32    Note that depending on the target LCD, either x or y gets rounded
  33    to the nearest multiple of 4 or 8 */
  34 void grey_set_position(int x, int y)
  35 {
  36 #if LCD_PIXELFORMAT == HORIZONTAL_PACKING
  37     _grey_info.bx = (x + 4) >> 3;
  38     x = 8 * _grey_info.bx;
  39 #else /* vertical packing or vertical interleaved */
  40 #if (LCD_DEPTH == 1) || (LCD_PIXELFORMAT == VERTICAL_INTERLEAVED)
  41     _grey_info.by = (y + 4) >> 3;
  42     y = 8 * _grey_info.by;
  43 #elif LCD_DEPTH == 2
  44     _grey_info.by = (y + 2) >> 2;
  45     y = 4 * _grey_info.by;
  46 #endif
  47 #endif /* LCD_PIXELFORMAT */
  48     _grey_info.x = x;
  49     _grey_info.y = y;
  50
  51     if (_grey_info.flags & _GREY_RUNNING)
  52     {
  53 #ifdef SIMULATOR
  54         rb->sim_lcd_ex_update_rect(_grey_info.x, _grey_info.y,
  55                                               _grey_info.width,
  56                                               _grey_info.height);
  57         grey_deferred_lcd_update();
  58 #else
  59         _grey_info.flags |= _GREY_DEFERRED_UPDATE;
  60 #endif
  61     }
  62 }
  63
  64 /* Set the draw mode for subsequent drawing operations */
  65 void grey_set_drawmode(int mode)
  66 {
  67     _grey_info.drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
  68 }
  69
  70 /* Return the current draw mode */
  71 int  grey_get_drawmode(void)
  72 {
  73     return _grey_info.drawmode;
  74 }
  75
  76 /* Set the foreground shade for subsequent drawing operations */
  77 void grey_set_foreground(unsigned brightness)
  78 {
  79     _grey_info.fg_brightness = brightness;
  80 }
  81
  82 /* Return the current foreground shade */
  83 unsigned grey_get_foreground(void)
  84 {
  85     return _grey_info.fg_brightness;
  86 }
  87
  88 /* Set the background shade for subsequent drawing operations */
  89 void grey_set_background(unsigned brightness)
  90 {
  91     _grey_info.bg_brightness = brightness;
  92 }
  93
  94 /* Return the current background shade */
  95 unsigned grey_get_background(void)
  96 {
  97     return _grey_info.bg_brightness;
  98 }
  99
 100 /* Set draw mode, foreground and background shades at once */
 101 void grey_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness)
 102 {
 103     grey_set_drawmode(mode);
 104     grey_set_foreground(fg_brightness);
 105     grey_set_background(bg_brightness);
 106 }
 107
 108 /* Set font for the text output routines */
 109 void grey_setfont(int newfont)
 110 {
 111     _grey_info.curfont = newfont;
 112 }
 113
 114 /* Get width and height of a text when printed with the current font */
 115 int  grey_getstringsize(const unsigned char *str, int *w, int *h)
 116 {
 117     return rb->font_getstringsize(str, w, h, _grey_info.curfont);
 118 }