src/gtk/gtkpixbuffactory.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 <cstdlib>
  28 #include <stdexcept>
  29
  30 #include "gtk/gtkpixbuffactory.hpp"
  31 #include "gtk/gtkpixbuf.hpp"
  32 #include "cave/colors.hpp"
  33
  34 Pixbuf *GTKPixbufFactory::create_composite_color(const Pixbuf &src, const GdColor &c, unsigned char alpha) const {
  35     GTKPixbuf const &srcgtk = static_cast<GTKPixbuf const &>(src);
  36     guint32 color = c.get_uint_0rgb();
  37     GdkPixbuf *pb = gdk_pixbuf_composite_color_simple(srcgtk.get_gdk_pixbuf(), src.get_width(), src.get_height(), GDK_INTERP_NEAREST, 255 - alpha, 1, color, color);
  38     return new GTKPixbuf(pb);
  39 }
  40
  41 Pixbuf *GTKPixbufFactory::create_subpixbuf(Pixbuf &src, int x, int y, int w, int h) const {
  42     GTKPixbuf &srcgtk = static_cast<GTKPixbuf &>(src);
  43     GdkPixbuf *sub = gdk_pixbuf_new_subpixbuf(srcgtk.get_gdk_pixbuf(), x, y, w, h);
  44     g_assert(sub != NULL);
  45     // gdk references pixbuf automatically, so it won't be cleared until the new GTKPixbuf is deleted, too
  46     return new GTKPixbuf(sub);
  47 }
  48
  49 Pixbuf *GTKPixbufFactory::create_rotated(const Pixbuf &src, Rotation r) const {
  50     GdkPixbuf const *srcgtk = static_cast<GTKPixbuf const &>(src).get_gdk_pixbuf();
  51     GdkPixbuf *pb = NULL;
  52     switch (r) {
  53         case None:
  54             pb = gdk_pixbuf_rotate_simple(srcgtk, GDK_PIXBUF_ROTATE_NONE);
  55             break;
  56         case CounterClockWise:
  57             pb = gdk_pixbuf_rotate_simple(srcgtk, GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE);
  58             break;
  59         case UpsideDown:
  60             pb = gdk_pixbuf_rotate_simple(srcgtk, GDK_PIXBUF_ROTATE_UPSIDEDOWN);
  61             break;
  62         case ClockWise:
  63             pb = gdk_pixbuf_rotate_simple(srcgtk, GDK_PIXBUF_ROTATE_CLOCKWISE);
  64             break;
  65     }
  66     g_assert(pb != NULL);
  67     return new GTKPixbuf(pb);
  68 }
  69
  70
  71 Pixbuf *GTKPixbufFactory::create(int w, int h) const {
  72     return new GTKPixbuf(w, h);
  73 }
  74
  75
  76 Pixbuf *GTKPixbufFactory::create_from_inline(int length, unsigned char const *data) const {
  77     GInputStream *is = g_memory_input_stream_new_from_data(data, length, NULL);
  78     GError *error = NULL;
  79     GdkPixbuf *pixbuf = gdk_pixbuf_new_from_stream(is, NULL, &error);
  80     g_object_unref(is);
  81     if (!pixbuf) {
  82         std::runtime_error exc(std::string("cannot load image ") + error->message);
  83         g_error_free(error);
  84         throw exc;
  85     }
  86     return new GTKPixbuf(pixbuf);
  87 }
  88
  89
  90 Pixbuf *GTKPixbufFactory::create_from_file(const char *filename) const {
  91     GError *error = NULL;
  92     GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(filename, &error);
  93     if (!pixbuf) {
  94         std::runtime_error exc(std::string("cannot load image ") + error->message);
  95         g_error_free(error);
  96         throw exc;
  97     }
  98     return new GTKPixbuf(pixbuf);
  99 }
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