swfdec/swfdec_image_decoder.c

   1 /* Swfdec
   2  * Copyright (C) 2007 Benjamin Otte <otte@gnome.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301  USA
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "swfdec_image_decoder.h"
  25 #include "swfdec_debug.h"
  26 #include "swfdec_image.h"
  27
  28 G_DEFINE_TYPE (SwfdecImageDecoder, swfdec_image_decoder, SWFDEC_TYPE_DECODER)
  29
  30 static void
  31 swfdec_image_decoder_dispose (GObject *object)
  32 {
  33   SwfdecImageDecoder *image = SWFDEC_IMAGE_DECODER (object);
  34
  35   if (image->queue) {
  36     swfdec_buffer_queue_unref (image->queue);
  37     image->queue = NULL;
  38   }
  39
  40   if (image->image) {
  41     g_object_unref (image->image);
  42     image->image = NULL;
  43   }
  44
  45   G_OBJECT_CLASS (swfdec_image_decoder_parent_class)->dispose (object);
  46 }
  47
  48 static SwfdecStatus
  49 swfdec_image_decoder_parse (SwfdecDecoder *dec, SwfdecBuffer *buffer)
  50 {
  51   SwfdecImageDecoder *image = SWFDEC_IMAGE_DECODER (dec);
  52
  53   if (image->queue == NULL)
  54     image->queue = swfdec_buffer_queue_new ();
  55   swfdec_buffer_queue_push (image->queue, buffer);
  56   dec->bytes_loaded += buffer->length;
  57   if (dec->bytes_loaded > dec->bytes_total)
  58     dec->bytes_total = dec->bytes_loaded;
  59   return 0;
  60 }
  61
  62 /* FIXME: move this to swfdec_image API? */
  63 static gboolean
  64 swfdec_image_get_size (SwfdecImage *image, guint *w, guint *h)
  65 {
  66   cairo_surface_t *surface;
  67
  68   surface = swfdec_image_create_surface (image, NULL);
  69   if (surface == NULL)
  70     return FALSE;
  71
  72   if (w)
  73     *w = cairo_image_surface_get_width (surface);
  74   if (h)
  75     *h = cairo_image_surface_get_width (surface);
  76
  77   cairo_surface_destroy (surface);
  78
  79   return TRUE;
  80 }
  81
  82 static SwfdecStatus
  83 swfdec_image_decoder_eof (SwfdecDecoder *dec)
  84 {
  85   SwfdecImageDecoder *image = SWFDEC_IMAGE_DECODER (dec);
  86   SwfdecBuffer *buffer;
  87   guint depth;
  88
  89   if (image->queue == NULL)
  90     return 0;
  91   depth = swfdec_buffer_queue_get_depth (image->queue);
  92   if (depth == 0) {
  93     swfdec_buffer_queue_unref (image->queue);
  94     image->queue = NULL;
  95     return SWFDEC_STATUS_ERROR;
  96   }
  97   buffer = swfdec_buffer_queue_pull (image->queue,
  98       swfdec_buffer_queue_get_depth (image->queue));
  99   swfdec_buffer_queue_unref (image->queue);
 100   image->queue = NULL;
 101   image->image = swfdec_image_new (buffer);
 102   if (!swfdec_image_get_size (image->image, &dec->width, &dec->height))
 103     return SWFDEC_STATUS_ERROR;
 104   dec->frames_loaded = 1;
 105   dec->frames_total = 1;
 106   if (image->image->type == SWFDEC_IMAGE_TYPE_JPEG)
 107     dec->data_type = SWFDEC_LOADER_DATA_JPEG;
 108   else if (image->image->type == SWFDEC_IMAGE_TYPE_PNG)
 109     dec->data_type = SWFDEC_LOADER_DATA_PNG;
 110
 111
 112   return SWFDEC_STATUS_INIT | SWFDEC_STATUS_IMAGE;
 113 }
 114
 115 static void
 116 swfdec_image_decoder_class_init (SwfdecImageDecoderClass *class)
 117 {
 118   GObjectClass *object_class = G_OBJECT_CLASS (class);
 119   SwfdecDecoderClass *decoder_class = SWFDEC_DECODER_CLASS (class);
 120
 121   object_class->dispose = swfdec_image_decoder_dispose;
 122
 123   decoder_class->parse = swfdec_image_decoder_parse;
 124   decoder_class->eof = swfdec_image_decoder_eof;
 125 }
 126
 127 static void
 128 swfdec_image_decoder_init (SwfdecImageDecoder *s)
 129 {
 130 }
 131