src/gtk/gtkpixbuffactory.cpp

   1 /*
   2  * Copyright (c) 2007-2013, Czirkos Zoltan http://code.google.com/p/gdash/
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "config.h"
  18
  19 #include <gtk/gtk.h>
  20 #include <cstdlib>
  21
  22 #include "gtk/gtkpixbuffactory.hpp"
  23 #include "cave/helper/colors.hpp"
  24 #include "gtk/gtkpixmap.hpp"
  25
  26 GTKPixbuf *GTKPixbufFactory::create_composite_color(const Pixbuf &src, const GdColor &c, unsigned char alpha) const {
  27     GTKPixbuf const &srcgtk = static_cast<GTKPixbuf const &>(src);
  28     guint32 color = (c.get_r()<<16) | (c.get_g()<<8) | (c.get_b()<<0);
  29     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);
  30     return new GTKPixbuf(pb);
  31 }
  32
  33 GTKPixbuf *GTKPixbufFactory::create_subpixbuf(Pixbuf &src, int x, int y, int w, int h) const {
  34     GTKPixbuf &srcgtk = static_cast<GTKPixbuf &>(src);
  35     GdkPixbuf *sub = gdk_pixbuf_new_subpixbuf(srcgtk.get_gdk_pixbuf(), x, y, w, h);
  36     g_assert(sub!=NULL);
  37     // gdk references pixbuf automatically, so it won't be cleared until the new GTKPixbuf is deleted, too
  38     return new GTKPixbuf(sub);
  39 }
  40
  41 Pixmap *GTKPixbufFactory::create_pixmap_from_pixbuf(const Pixbuf &pb, bool format_alpha) const {
  42     GTKPixbuf *scaled = static_cast<GTKPixbuf *>(create_scaled(pb));
  43     GdkDrawable *pixmap;
  44     GdkBitmap *mask;
  45
  46     if (format_alpha)
  47         gdk_pixbuf_render_pixmap_and_mask(scaled->get_gdk_pixbuf(), &pixmap, &mask, 128);     // 128 = alpha threshold
  48     else {
  49         gdk_pixbuf_render_pixmap_and_mask(scaled->get_gdk_pixbuf(), &pixmap, NULL, 128);      // 128 = alpha threshold
  50         mask=NULL;
  51     }
  52     delete scaled;
  53
  54     return new GTKPixmap(pixmap, mask);
  55 }
  56
  57 GTKPixbuf *GTKPixbufFactory::create_rotated(const Pixbuf &src, Rotation r) const {
  58     GdkPixbuf const *srcgtk = static_cast<GTKPixbuf const &>(src).get_gdk_pixbuf();
  59     GdkPixbuf *pb=NULL;
  60     switch (r) {
  61         case None:
  62             pb=gdk_pixbuf_rotate_simple(srcgtk, GDK_PIXBUF_ROTATE_NONE);
  63             break;
  64         case CounterClockWise:
  65             pb=gdk_pixbuf_rotate_simple(srcgtk, GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE);
  66             break;
  67         case UpsideDown:
  68             pb=gdk_pixbuf_rotate_simple(srcgtk, GDK_PIXBUF_ROTATE_UPSIDEDOWN);
  69             break;
  70         case ClockWise:
  71             pb=gdk_pixbuf_rotate_simple(srcgtk, GDK_PIXBUF_ROTATE_CLOCKWISE);
  72             break;
  73     }
  74     g_assert(pb!=NULL);
  75     return new GTKPixbuf(pb);
  76 }
  77
  78
  79 GTKPixbufFactory::GTKPixbufFactory(GdScalingType scaling_type_, bool pal_emulation_)
  80     :   PixbufFactory(scaling_type_, pal_emulation_) {
  81 }
  82
  83
  84 GTKPixbuf *GTKPixbufFactory::create(int w, int h) const {
  85     return new GTKPixbuf(w, h);
  86 }
  87
  88
  89 GTKPixbuf *GTKPixbufFactory::create_from_inline(int length, unsigned char const *data) const {
  90     return new GTKPixbuf(length, data);
  91 }
  92
  93
  94 GTKPixbuf *GTKPixbufFactory::create_from_file(const char *filename) const {
  95     return new GTKPixbuf(filename);
  96 }