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-rw-r--r--src/ithumb-writer.c111
1 files changed, 98 insertions, 13 deletions
diff --git a/src/ithumb-writer.c b/src/ithumb-writer.c
index c6fa507..2c925a8 100644
--- a/src/ithumb-writer.c
+++ b/src/ithumb-writer.c
@@ -1,4 +1,4 @@
-/* Time-stamp: <2007-09-09 00:13:13 jcs>
+/* Time-stamp: <2007-10-27 22:01:00 jcs>
*
* Copyright (C) 2005 Christophe Fergeau
*
@@ -67,7 +67,8 @@ typedef struct _iThumbWriter iThumbWriter;
static guint16 *
pack_RGB_565 (GdkPixbuf *pixbuf, const Itdb_ArtworkFormat *img_info,
- gint horizontal_padding, gint vertical_padding)
+ gint horizontal_padding, gint vertical_padding,
+ guint32 *thumb_size)
{
guchar *pixels;
guint16 *result;
@@ -88,7 +89,8 @@ pack_RGB_565 (GdkPixbuf *pixbuf, const Itdb_ArtworkFormat *img_info,
* hardcoded in libipoddevice code, so dst_width * dst_height * 2 can't
* overflow, even on an iPod containing malicious data
*/
- result = g_malloc0 (img_info->width * img_info->height * 2);
+ *thumb_size = img_info->width * img_info->height * 2;
+ result = g_malloc0 (*thumb_size);
byte_order = itdb_thumb_get_byteorder (img_info->format);
@@ -118,7 +120,8 @@ pack_RGB_565 (GdkPixbuf *pixbuf, const Itdb_ArtworkFormat *img_info,
static guint16 *
pack_RGB_555 (GdkPixbuf *pixbuf, const Itdb_ArtworkFormat *img_info,
- gint horizontal_padding, gint vertical_padding)
+ gint horizontal_padding, gint vertical_padding,
+ guint32 *thumb_size)
{
guchar *pixels;
guint16 *result;
@@ -139,7 +142,9 @@ pack_RGB_555 (GdkPixbuf *pixbuf, const Itdb_ArtworkFormat *img_info,
* hardcoded in libipoddevice code, so dst_width * dst_height * 2 can't
* overflow, even on an iPod containing malicious data
*/
- result = g_malloc0 (img_info->width * img_info->height * 2);
+
+ *thumb_size = img_info->width * img_info->height * 2;
+ result = g_malloc0 (*thumb_size);
byte_order = itdb_thumb_get_byteorder (img_info->format);
@@ -173,6 +178,65 @@ pack_RGB_555 (GdkPixbuf *pixbuf, const Itdb_ArtworkFormat *img_info,
}
+static guint16 *
+pack_RGB_888 (GdkPixbuf *pixbuf, const Itdb_ArtworkFormat *img_info,
+ gint horizontal_padding, gint vertical_padding,
+ guint32 *thumb_size)
+{
+ guchar *pixels;
+ guint32 *result;
+ gint row_stride;
+ gint channels;
+ gint width;
+ gint height;
+ gint w;
+ gint h;
+ gint byte_order;
+
+ g_object_get (G_OBJECT (pixbuf),
+ "rowstride", &row_stride, "n-channels", &channels,
+ "height", &height, "width", &width,
+ "pixels", &pixels, NULL);
+ g_return_val_if_fail ((width <= img_info->width) && (height <= img_info->height), NULL);
+ /* dst_width and dst_height come from a width/height database
+ * hardcoded in libipoddevice code, so dst_width * dst_height * 2 can't
+ * overflow, even on an iPod containing malicious data
+ */
+ *thumb_size = img_info->width * img_info->height * 4;
+ result = g_malloc0 (*thumb_size);
+
+ byte_order = itdb_thumb_get_byteorder (img_info->format);
+
+ for (h = 0; h < height; h++) {
+ gint line = (h+vertical_padding)*img_info->width;
+ for (w = 0; w < width; w++) {
+ guint32 r;
+ guint32 g;
+ guint32 b;
+ guint32 a;
+
+ r = pixels[h*row_stride + w*channels];
+ g = pixels[h*row_stride + w*channels + 1];
+ b = pixels[h*row_stride + w*channels + 2];
+
+ r >>= (8 - RED_BITS_888);
+ g >>= (8 - GREEN_BITS_888);
+ b >>= (8 - BLUE_BITS_888);
+ a = (0xff << ALPHA_SHIFT_888) & ALPHA_MASK_888;
+ r = (r << RED_SHIFT_888) & RED_MASK_888;
+ g = (g << GREEN_SHIFT_888) & GREEN_MASK_888;
+ b = (b << BLUE_SHIFT_888) & BLUE_MASK_888;
+ result[line + w + horizontal_padding] =
+ get_gint32 (a | r | g | b, byte_order);
+ /* I'm not sure if the highest bit really is
+ the alpha channel. For now I'm just setting
+ these bits because that's what I have seen. */
+ }
+ }
+ return (guint16 *)result;
+}
+
+
static guint16 *derange_pixels (guint16 *pixels_s, guint16 *pixels_d,
gint width, gint height, gint row_stride)
{
@@ -212,13 +276,15 @@ static guint16 *derange_pixels (guint16 *pixels_s, guint16 *pixels_d,
static guint16 *
pack_rec_RGB_555 (GdkPixbuf *pixbuf, const Itdb_ArtworkFormat *img_info,
- gint horizontal_padding, gint vertical_padding)
+ gint horizontal_padding, gint vertical_padding,
+ guint32 *thumb_size)
{
guint16 *pixels;
guint16 *deranged_pixels = NULL;
pixels = pack_RGB_555 (pixbuf, img_info,
- horizontal_padding, vertical_padding);
+ horizontal_padding, vertical_padding,
+ thumb_size);
if (pixels)
{
@@ -236,7 +302,8 @@ pack_rec_RGB_555 (GdkPixbuf *pixbuf, const Itdb_ArtworkFormat *img_info,
* (www.gpixpod.org) */
static guchar *
pack_UYVY (GdkPixbuf *orig_pixbuf, const Itdb_ArtworkFormat *img_info,
- gint horizontal_padding, gint vertical_padding)
+ gint horizontal_padding, gint vertical_padding,
+ guint32 *thumb_size)
{
GdkPixbuf *pixbuf;
guchar *pixels, *yuvdata;
@@ -257,6 +324,7 @@ pack_UYVY (GdkPixbuf *orig_pixbuf, const Itdb_ArtworkFormat *img_info,
width = img_info->width;
height = img_info->height;
+ *thumb_size = 2*width*height;
g_object_get (G_OBJECT (orig_pixbuf),
"height", &orig_height, "width", &orig_width, NULL);
@@ -274,6 +342,7 @@ pack_UYVY (GdkPixbuf *orig_pixbuf, const Itdb_ArtworkFormat *img_info,
"pixels", &pixels, NULL);
yuvsize = width*2*height;
+
yuvdata = g_malloc (yuvsize);
halfyuv = yuvsize/2;
if (gdk_pixbuf_get_has_alpha(pixbuf))
@@ -572,7 +641,6 @@ ithumb_writer_write_thumbnail (iThumbWriter *writer,
thumb->width = thumb->horizontal_padding + width;
thumb->height = thumb->vertical_padding + height;
thumb->offset = writer->cur_offset;
- thumb->size = writer->img_info->width * writer->img_info->height * 2;
switch (writer->img_info->format)
{
@@ -585,7 +653,8 @@ ithumb_writer_write_thumbnail (iThumbWriter *writer,
case THUMB_FORMAT_RGB565_BE:
pixels = pack_RGB_565 (pixbuf, writer->img_info,
thumb->horizontal_padding,
- thumb->vertical_padding);
+ thumb->vertical_padding,
+ &thumb->size);
break;
case THUMB_FORMAT_RGB555_LE_90:
case THUMB_FORMAT_RGB555_BE_90:
@@ -596,7 +665,20 @@ ithumb_writer_write_thumbnail (iThumbWriter *writer,
case THUMB_FORMAT_RGB555_BE:
pixels = pack_RGB_555 (pixbuf, writer->img_info,
thumb->horizontal_padding,
- thumb->vertical_padding);
+ thumb->vertical_padding,
+ &thumb->size);
+ break;
+ case THUMB_FORMAT_RGB888_LE_90:
+ case THUMB_FORMAT_RGB888_BE_90:
+ /* FIXME: actually the previous two might require
+ different treatment (used on iPod Photo for the full
+ screen photo thumbnail) */
+ case THUMB_FORMAT_RGB888_LE:
+ case THUMB_FORMAT_RGB888_BE:
+ pixels = pack_RGB_888 (pixbuf, writer->img_info,
+ thumb->horizontal_padding,
+ thumb->vertical_padding,
+ &thumb->size);
break;
case THUMB_FORMAT_REC_RGB555_LE_90:
case THUMB_FORMAT_REC_RGB555_BE_90:
@@ -607,7 +689,8 @@ ithumb_writer_write_thumbnail (iThumbWriter *writer,
case THUMB_FORMAT_REC_RGB555_BE:
pixels = pack_rec_RGB_555 (pixbuf, writer->img_info,
thumb->horizontal_padding,
- thumb->vertical_padding);
+ thumb->vertical_padding,
+ &thumb->size);
break;
case THUMB_FORMAT_EXPERIMENTAL_LE:
case THUMB_FORMAT_EXPERIMENTAL_BE:
@@ -616,7 +699,8 @@ ithumb_writer_write_thumbnail (iThumbWriter *writer,
case THUMB_FORMAT_UYVY_LE:
pixels = pack_UYVY (pixbuf, writer->img_info,
thumb->horizontal_padding,
- thumb->vertical_padding);
+ thumb->vertical_padding,
+ &thumb->size);
break;
}
@@ -627,6 +711,7 @@ ithumb_writer_write_thumbnail (iThumbWriter *writer,
{
return FALSE;
}
+
if (fwrite (pixels, thumb->size, 1, writer->f) != 1) {
g_free (pixels);
g_print ("Error writing to file: %s\n", strerror (errno));
generated by cgit (git 2.34.1) at 2025-07-03 22:53:33 +0000