kolourpaint/cursors/kpCursorLightCross.cpp

   1
   2 /*
   3    Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
   4    All rights reserved.
   5
   6    Redistribution and use in source and binary forms, with or without
   7    modification, are permitted provided that the following conditions
   8    are met:
   9
  10    1. Redistributions of source code must retain the above copyright
  11       notice, this list of conditions and the following disclaimer.
  12    2. Redistributions in binary form must reproduce the above copyright
  13       notice, this list of conditions and the following disclaimer in the
  14       documentation and/or other materials provided with the distribution.
  15
  16    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 */
  27
  28 #define DEBUG_KP_CURSOR_LIGHT_CROSS 0
  29
  30
  31 #include <kpCursorLightCross.h>
  32
  33 #include <qbitmap.h>
  34 #include <qcursor.h>
  35
  36 #include <kdebug.h>
  37
  38
  39 enum PixelValue
  40 {
  41     White, Black, Transparent
  42 };
  43
  44 static void setPixel (unsigned char *colorBitmap,
  45                       unsigned char *maskBitmap,
  46                       int width,
  47                       int y, int x, enum PixelValue pv)
  48 {
  49     const int ColorBlack = 1;
  50     const int ColorWhite = 0;
  51
  52     const int MaskOpaque = 1;
  53     const int MaskTransparent = 0;
  54
  55     int colorValue, maskValue;
  56
  57     switch (pv)
  58     {
  59     case White:
  60         colorValue = ColorWhite;
  61         maskValue = MaskOpaque;
  62         break;
  63
  64     case Black:
  65         colorValue = ColorBlack;
  66         maskValue = MaskOpaque;
  67         break;
  68
  69     case Transparent:
  70     default:
  71         colorValue = ColorWhite;
  72         maskValue = MaskTransparent;
  73         break;
  74     }
  75
  76     if (colorValue)
  77         colorBitmap [y * (width / 8) + (x / 8)] |= (1 << (x % 8));
  78
  79     if (maskValue)
  80         maskBitmap [y * (width / 8) + (x / 8)] |= (1 << (x % 8));
  81 }
  82
  83
  84 const QCursor *kpCursorLightCrossCreate ()
  85 {
  86 #if DEBUG_KP_CURSOR_LIGHT_CROSS
  87     kDebug () << "kpCursorLightCrossCreate() ";
  88 #endif
  89
  90     const int side = 24;
  91     const int byteSize = (side * side) / 8;
  92     unsigned char *colorBitmap = new unsigned char [byteSize];
  93     unsigned char *maskBitmap = new unsigned char [byteSize];
  94
  95     memset (colorBitmap, 0, byteSize);
  96     memset (maskBitmap, 0, byteSize);
  97
  98     const int oddSide = side - 1;
  99     const int strokeLen = oddSide * 3 / 8;
 100
 101     for (int i = 0; i < strokeLen; i++)
 102     {
 103         const enum PixelValue pv = (i % 2) ? Black : White;
 104
 105     #define X_(val) (val)
 106     #define Y_(val) (val)
 107     #define DRAW(y,x) setPixel (colorBitmap, maskBitmap, side, (y), (x), pv)
 108         // horizontal
 109         DRAW (Y_(side / 2), X_(1 + i));
 110         DRAW (Y_(side / 2), X_(side - 1 - i));
 111
 112         // vertical
 113         DRAW (Y_(1 + i), X_(side / 2));
 114         DRAW (Y_(side - 1 - i), X_(side / 2));
 115     #undef DRAW
 116     #undef Y_
 117     #undef X_
 118     }
 119
 120     const QSize size (side, side);
 121     QCursor *cursor = new QCursor (
 122         QBitmap::fromData (size, colorBitmap, QImage::Format_MonoLSB),
 123         QBitmap::fromData (size, maskBitmap, QImage::Format_MonoLSB));
 124
 125     delete [] maskBitmap;
 126     delete [] colorBitmap;
 127
 128     return cursor;
 129 }
 130