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plug-ins: raw_load_rgb565() ported to GEGL iterators. 

Rather than allocating 2 huge data buffers of the whole image size (one
in RGB565 and one in RGB-u8), just iterate through the file only
creating one single small temporary data buffer for single input line in
tiles returned by the iterator. This will be much better,
memory-efficiency wise.
This commit is contained in:
Jehan 2022-06-20 14:34:58 +02:00
parent e9876a8b7f
commit ba582253df
1 changed files with 19 additions and 8 deletions
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27
plug-ins/common/file-raw-data.c
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@ -868,18 +868,29 @@ raw_load_rgb565 (RawGimpData *data,
gint offset,
RawType type)
{
gint32 num_pixels = width * height;
guint16 *in = g_malloc (num_pixels * 2);
guchar *row = g_malloc (num_pixels * 3);
GeglBufferIterator *iter;
guint16 *in = NULL;
raw_read_row (data->fp, (guchar *)in, offset, num_pixels * 2);
rgb_565_to_888 (in, row, num_pixels, type);
iter = gegl_buffer_iterator_new (data->buffer, GEGL_RECTANGLE (0, 0, width, height),
0, NULL, GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE, 1);
gegl_buffer_set (data->buffer, GEGL_RECTANGLE (0, 0, width, height),
0, NULL, row, GEGL_AUTO_ROWSTRIDE);
while (gegl_buffer_iterator_next (iter))
{
const GeglRectangle *roi = &iter->items[0].roi;
guchar *out = iter->items[0].data;
gint line;
in = g_realloc (in, iter->length * 2);
for (line = 0; line < roi->height; line++)
{
raw_read_row (data->fp, (guchar *) in,
offset + ((roi->y + line) * width * 2) + roi->x * 2,
iter->length * 2);
rgb_565_to_888 (in, out + line * roi->width * 3, roi->width, type);
}
}
g_free (in);
g_free (row);
return TRUE;
}