src/Fl_Tiled_Image.cxx

   1 //
   2 // "$Id: Fl_Tiled_Image.cxx 7903 2010-11-28 21:06:39Z matt $"
   3 //
   4 // Tiled image code for the Fast Light Tool Kit (FLTK).
   5 //
   6 // Copyright 1998-2010 by Bill Spitzak and others.
   7 //
   8 // This library is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU Library General Public
  10 // License as published by the Free Software Foundation; either
  11 // version 2 of the License, or (at your option) any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // Library General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU Library General Public
  19 // License along with this library; if not, write to the Free Software
  20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21 // USA.
  22 //
  23 // Please report all bugs and problems on the following page:
  24 //
  25 //     http://www.fltk.org/str.php
  26 //
  27
  28
  29 #include <FL/Fl.H>
  30 #include <FL/Fl_Tiled_Image.H>
  31 #include <FL/fl_draw.H>
  32
  33 /**
  34   The constructors create a new tiled image containing the specified image.
  35   Use a width and height of 0 to tile the whole window/widget.
  36 */
  37 Fl_Tiled_Image::Fl_Tiled_Image(Fl_Image *i,     // I - Image to tile
  38                                int      W,      // I - Width of tiled area
  39                                int      H) :    // I - Height of tiled area
  40   Fl_Image(W,H,0) {
  41   image_       = i;
  42   alloc_image_ = 0;
  43
  44   if (W == 0) w(Fl::w());
  45   if (H == 0) h(Fl::h());
  46 }
  47 /**
  48   The destructor frees all memory and server resources that are used by
  49   the tiled image.
  50 */
  51   Fl_Tiled_Image::~Fl_Tiled_Image() {
  52   if (alloc_image_) delete image_;
  53 }
  54
  55
  56 //
  57 // 'Fl_Tiled_Image::copy()' - Copy and resize a tiled image...
  58 //
  59
  60 Fl_Image *                      // O - New image
  61 Fl_Tiled_Image::copy(int W,     // I - New width
  62                      int H) {   // I - New height
  63   if (W == w() && H == h()) return this;
  64   else return new Fl_Tiled_Image(image_, W, H);
  65 }
  66
  67
  68 //
  69 // 'Fl_Tiled_Image::color_average()' - Blend colors...
  70 //
  71
  72 void
  73 Fl_Tiled_Image::color_average(Fl_Color c,       // I - Color to blend with
  74                               float    i) {     // I - Blend fraction
  75   if (!alloc_image_) {
  76     image_       = image_->copy();
  77     alloc_image_ = 1;
  78   }
  79
  80   image_->color_average(c, i);
  81 }
  82
  83
  84 //
  85 // 'Fl_Tiled_Image::desaturate()' - Convert the image to grayscale...
  86 //
  87
  88 void
  89 Fl_Tiled_Image::desaturate() {
  90   if (!alloc_image_) {
  91     image_       = image_->copy();
  92     alloc_image_ = 1;
  93   }
  94
  95   image_->desaturate();
  96 }
  97
  98
  99 //
 100 // 'Fl_Tiled_Image::draw()' - Draw a shared image...
 101 //
 102
 103 void
 104 Fl_Tiled_Image::draw(int X,     // I - Starting X position
 105                      int Y,     // I - Starting Y position
 106                      int W,     // I - Width of area to be filled
 107                      int H,     // I - Height of area to be filled
 108                      int cx,    // I - "Source" X position
 109                      int cy) {  // I - "Source" Y position
 110   if (!image_->w() || !image_->h()) return;
 111   if (W == 0) W = Fl::w();
 112   if (H == 0) H = Fl::h();
 113
 114   fl_push_clip(X, Y, W, H);
 115
 116   X += cx;
 117   Y += cy;
 118
 119   X = X - (X % image_->w());
 120   Y = Y - (Y % image_->h());
 121
 122   W += X;
 123   H += Y;
 124
 125   for (int yy = Y; yy < H; yy += image_->h())
 126     for (int xx = X; xx < W; xx += image_->w())
 127       image_->draw(xx, yy);
 128
 129   fl_pop_clip();
 130 }
 131
 132
 133 //
 134 // End of "$Id: Fl_Tiled_Image.cxx 7903 2010-11-28 21:06:39Z matt $".
 135 //