src/gtk/gtkpixbuf.cpp

   1 /*
   2  * Copyright (c) 2007-2013, Czirkos Zoltan http://code.google.com/p/gdash/
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining
   5  * a copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sublicense, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  18  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
  19  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
  20  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include "config.h"
  25
  26 #include <gtk/gtk.h>
  27 #include <stdexcept>
  28
  29 #include "cave/colors.hpp"
  30 #include "gtk/gtkpixbuf.hpp"
  31
  32
  33 GTKPixbuf::GTKPixbuf(int w, int h) {
  34     pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, w, h);
  35 }
  36
  37
  38 GTKPixbuf::GTKPixbuf(GdkPixbuf *pb)
  39     : pixbuf(pb) {
  40     /* convert to our own format if necessary */
  41     if (!gdk_pixbuf_get_has_alpha(pixbuf) || gdk_pixbuf_get_bits_per_sample(pixbuf) != 8
  42             || gdk_pixbuf_get_n_channels(pixbuf) != 4) {
  43         int w = gdk_pixbuf_get_width(pixbuf);
  44         int h = gdk_pixbuf_get_height(pixbuf);
  45         GdkPixbuf *newpixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, w, h);
  46         gdk_pixbuf_copy_area(pixbuf, 0, 0, w, h, newpixbuf, 0, 0);
  47         g_object_unref(pixbuf);
  48         pixbuf = newpixbuf;
  49     }
  50 }
  51
  52
  53 int GTKPixbuf::get_width() const {
  54     return gdk_pixbuf_get_width(pixbuf);
  55 }
  56
  57
  58 int GTKPixbuf::get_height() const {
  59     return gdk_pixbuf_get_height(pixbuf);
  60 }
  61
  62
  63 void GTKPixbuf::blit_full(int x, int y, int w, int h, Pixbuf &dest, int dx, int dy) const {
  64     GdkPixbuf *destpb = static_cast<GTKPixbuf &>(dest).pixbuf;
  65
  66     gdk_pixbuf_composite(pixbuf, destpb, dx, dy, w, h, dx - x, dy - y, 1, 1, GDK_INTERP_NEAREST, 255);
  67 }
  68
  69
  70 void GTKPixbuf::copy_full(int x, int y, int w, int h, Pixbuf &dest, int dx, int dy) const {
  71     // gdk_pixbuf_copy_area does not like clipping
  72     if (dy + h > dest.get_height()) {
  73         h = dest.get_height() - dy;
  74         if (h < 0)
  75             return;
  76     }
  77     if (dx + w > dest.get_width()) {
  78         w = dest.get_width() - dx;
  79         if (w < 0)
  80             return;
  81     }
  82     GdkPixbuf *destpb = static_cast<GTKPixbuf &>(dest).pixbuf;
  83     gdk_pixbuf_copy_area(pixbuf, x, y, w, h, destpb, dx, dy);
  84 }
  85
  86
  87 void GTKPixbuf::fill_rect(int x, int y, int w, int h, const GdColor &c) {
  88     GdkPixbuf *sub = gdk_pixbuf_new_subpixbuf(pixbuf, x, y, w, h);
  89     unsigned char r, g, b;
  90     c.get_rgb(r, g, b);
  91     gdk_pixbuf_fill(sub, (guint32(r) << 24) | (guint32(g) << 16) | (guint32(b) << 8) | (0xff << 0));
  92     g_object_unref(sub);
  93 }
  94
  95
  96 unsigned char *GTKPixbuf::get_pixels() const {
  97     return gdk_pixbuf_get_pixels(pixbuf);
  98 }
  99
 100
 101 int GTKPixbuf::get_pitch() const {
 102     return gdk_pixbuf_get_rowstride(pixbuf);
 103 }
 104
 105
 106 GTKPixbuf::~GTKPixbuf() {
 107     g_object_unref(pixbuf);
 108 }