cairo_surface_t *
_cairo_image_surface_scale (cairo_surface_t *image,
int scaled_width,
int scaled_height,
scale_filter_t filter,
GthAsyncTask *task)
{
int src_width;
int src_height;
cairo_surface_t *scaled;
cairo_surface_metadata_t *metadata;
resize_filter_t *resize_filter;
ScaleReal x_factor;
ScaleReal y_factor;
cairo_surface_t *tmp;
src_width = cairo_image_surface_get_width (image);
src_height = cairo_image_surface_get_height (image);
if ((src_width == scaled_width) && (src_height == scaled_height))
return _cairo_image_surface_copy (image);
scaled = _cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
scaled_width,
scaled_height);
_cairo_image_surface_copy_metadata (image, scaled);
metadata = _cairo_image_surface_get_metadata (scaled);
if (metadata->original_width <= 0) {
metadata->original_width = src_width;
metadata->original_height = src_height;
}
if (scaled == NULL)
return NULL;
if (g_once_init_enter (&coefficients_initialization)) {
initialize_coefficients (1.0, 0.0);
g_once_init_leave (&coefficients_initialization, 1);
}
resize_filter = resize_filter_create (task);
resize_filter_set_type (resize_filter, filter);
resize_filter->total_lines = scaled_width + scaled_height;
resize_filter->processed_lines = 0;
x_factor = (ScaleReal) scaled_width / src_width;
y_factor = (ScaleReal) scaled_height / src_height;
tmp = _cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
src_height,
scaled_width);
horizontal_scale_transpose (image, tmp, x_factor, resize_filter);
horizontal_scale_transpose (tmp, scaled, y_factor, resize_filter);
resize_filter_destroy (resize_filter);
cairo_surface_destroy (tmp);
return scaled;
}
cairo_surface_t *
_cairo_image_surface_copy (cairo_surface_t *source)
{
cairo_surface_t *result;
unsigned char *p_source;
unsigned char *p_destination;
if (source == NULL)
return NULL;
result = _cairo_image_surface_create (cairo_image_surface_get_format (source),
cairo_image_surface_get_width (source),
cairo_image_surface_get_height (source));
if (result == NULL)
return NULL;
p_source = _cairo_image_surface_flush_and_get_data (source);
p_destination = _cairo_image_surface_flush_and_get_data (result);
memcpy (p_destination, p_source, cairo_image_surface_get_stride (source) * cairo_image_surface_get_height (source));
cairo_surface_mark_dirty (result);
return result;
}
cairo_surface_t *
_cairo_create_dnd_icon (cairo_surface_t *image,
int icon_size,
ItemStyle style,
gboolean multi_dnd)
{
cairo_rectangle_int_t thumbnail_rect;
cairo_surface_t *thumbnail;
cairo_rectangle_int_t icon_rect;
int icon_padding;
cairo_rectangle_int_t frame_rect;
cairo_surface_t *icon;
cairo_t *cr;
thumbnail_rect.width = cairo_image_surface_get_width (image);
thumbnail_rect.height = cairo_image_surface_get_height (image);
if (scale_keeping_ratio (&thumbnail_rect.width, &thumbnail_rect.height, icon_size, icon_size, FALSE))
thumbnail = _cairo_image_surface_scale_fast (image, thumbnail_rect.width, thumbnail_rect.height);
else
thumbnail = cairo_surface_reference (image);
switch (style) {
case ITEM_STYLE_ICON:
icon_padding = 8;
icon_rect.width = icon_size + icon_padding;
icon_rect.height = icon_size + icon_padding;
thumbnail_rect.x = round ((double) (icon_rect.width - thumbnail_rect.width) / 2.0);
thumbnail_rect.y = round ((double) (icon_rect.height - thumbnail_rect.height) / 2.0);
frame_rect.x = 0;
frame_rect.y = 0;
frame_rect.width = icon_rect.width;
frame_rect.height = icon_rect.height;
break;
case ITEM_STYLE_IMAGE:
icon_padding = 8; /* padding for the frame border */
icon_rect.width = thumbnail_rect.width + icon_padding;
icon_rect.height = thumbnail_rect.height + icon_padding;
thumbnail_rect.x = 3;
thumbnail_rect.y = 3;
frame_rect.x = 0;
frame_rect.y = 0;
frame_rect.width = thumbnail_rect.width + icon_padding - 2;
frame_rect.height = thumbnail_rect.height + icon_padding - 2;
break;
case ITEM_STYLE_VIDEO:
icon_padding = 4; /* padding for the drop shadow effect */
icon_rect.width = thumbnail_rect.width + icon_padding;
icon_rect.height = icon_size + icon_padding;
thumbnail_rect.x = 0;
thumbnail_rect.y = round ((double) (icon_size - thumbnail_rect.height) / 2.0);
frame_rect.x = thumbnail_rect.x;
frame_rect.y = 0;
frame_rect.width = thumbnail_rect.width;
frame_rect.height = icon_size;
break;
}
if (multi_dnd) {
icon_rect.width += DRAG_ICON_THUMBNAIL_OFFSET;
icon_rect.height += DRAG_ICON_THUMBNAIL_OFFSET;
}
icon = _cairo_image_surface_create (CAIRO_FORMAT_ARGB32, icon_rect.width, icon_rect.height);
cr = cairo_create (icon);
switch (style) {
case ITEM_STYLE_ICON:
cairo_save (cr);
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.2);
_cairo_draw_rounded_box (cr, frame_rect.x, frame_rect.y, frame_rect.width, frame_rect.height, 4);
cairo_fill (cr);
cairo_restore (cr);
break;
case ITEM_STYLE_IMAGE:
if (multi_dnd)
_cairo_draw_thumbnail_frame (cr, frame_rect.x + DRAG_ICON_THUMBNAIL_OFFSET, frame_rect.y + DRAG_ICON_THUMBNAIL_OFFSET, frame_rect.width, frame_rect.height);
_cairo_draw_thumbnail_frame (cr, frame_rect.x, frame_rect.y, frame_rect.width, frame_rect.height);
break;
case ITEM_STYLE_VIDEO:
_cairo_draw_film_background (cr, frame_rect.x, frame_rect.y, frame_rect.width, frame_rect.height);
break;
}
cairo_save (cr);
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
cairo_set_source_surface (cr, thumbnail, thumbnail_rect.x, thumbnail_rect.y);
cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_FAST);
cairo_rectangle (cr, thumbnail_rect.x, thumbnail_rect.y, thumbnail_rect.width, thumbnail_rect.height);
cairo_fill (cr);
cairo_restore (cr);
if (style == ITEM_STYLE_VIDEO)
_cairo_draw_film_foreground (cr, frame_rect.x, frame_rect.y, frame_rect.width, frame_rect.height, icon_size);
cairo_surface_set_device_offset (icon, -icon_rect.width / 2, -icon_rect.height / 2);
cairo_surface_destroy (thumbnail);
cairo_destroy (cr);
return icon;
}
GthImage *
_cairo_image_surface_create_from_tiff (GInputStream *istream,
GthFileData *file_data,
int requested_size,
int *original_width_p,
int *original_height_p,
gboolean *loaded_original_p,
gpointer user_data,
GCancellable *cancellable,
GError **error)
{
GthImage *image;
Handle handle;
TIFF *tif;
gboolean first_directory;
int best_directory;
int max_width, max_height, min_diff;
uint32 image_width;
uint32 image_height;
uint32 spp;
uint16 extrasamples;
uint16 *sampleinfo;
uint16 orientation;
char emsg[1024];
cairo_surface_t *surface;
cairo_surface_metadata_t*metadata;
uint32 *raster;
image = gth_image_new ();
handle.cancellable = cancellable;
handle.size = 0;
if ((file_data != NULL) && (file_data->info != NULL)) {
handle.istream = g_buffered_input_stream_new (istream);
handle.size = g_file_info_get_size (file_data->info);
}
else {
void *data;
gsize size;
/* read the whole stream to get the file size */
if (! _g_input_stream_read_all (istream, &data, &size, cancellable, error))
return image;
handle.istream = g_memory_input_stream_new_from_data (data, size, g_free);
handle.size = size;
}
TIFFSetErrorHandler (tiff_error_handler);
TIFFSetWarningHandler (tiff_error_handler);
tif = TIFFClientOpen ("gth-tiff-reader", "r",
&handle,
tiff_read,
tiff_write,
tiff_seek,
tiff_close,
tiff_size,
NULL,
NULL);
if (tif == NULL) {
g_object_unref (handle.istream);
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
"Couldn't allocate memory for writing TIFF file");
return image;
}
/* find the best image to load */
first_directory = TRUE;
best_directory = -1;
max_width = -1;
max_height = -1;
min_diff = 0;
do {
int width;
int height;
if (TIFFGetField (tif, TIFFTAG_IMAGEWIDTH, &width) != 1)
continue;
if (TIFFGetField (tif, TIFFTAG_IMAGELENGTH, &height) != 1)
continue;
if (! TIFFRGBAImageOK (tif, emsg))
continue;
if (width > max_width) {
max_width = width;
max_height = height;
if (requested_size <= 0)
best_directory = TIFFCurrentDirectory (tif);
}
if (requested_size > 0) {
int diff = abs (requested_size - width);
if (first_directory) {
min_diff = diff;
best_directory = TIFFCurrentDirectory (tif);
}
else if (diff < min_diff) {
min_diff = diff;
best_directory = TIFFCurrentDirectory (tif);
}
}
first_directory = FALSE;
}
while (TIFFReadDirectory (tif));
if (best_directory == -1) {
TIFFClose (tif);
g_object_unref (handle.istream);
g_set_error_literal (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_DATA,
"Invalid TIFF format");
return image;
}
/* read the image */
TIFFSetDirectory (tif, best_directory);
TIFFGetField (tif, TIFFTAG_IMAGEWIDTH, &image_width);
TIFFGetField (tif, TIFFTAG_IMAGELENGTH, &image_height);
TIFFGetField (tif, TIFFTAG_SAMPLESPERPIXEL, &spp);
TIFFGetFieldDefaulted (tif, TIFFTAG_EXTRASAMPLES, &extrasamples, &sampleinfo);
if (TIFFGetFieldDefaulted (tif, TIFFTAG_ORIENTATION, &orientation) != 1)
orientation = ORIENTATION_TOPLEFT;
if (original_width_p)
*original_width_p = max_width;
if (original_height_p)
*original_height_p = max_height;
if (loaded_original_p)
*loaded_original_p = (max_width == image_width);
surface = _cairo_image_surface_create (CAIRO_FORMAT_ARGB32, image_width, image_height);
if (surface == NULL) {
TIFFClose (tif);
g_object_unref (handle.istream);
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
"Couldn't allocate memory for writing TIFF file");
return image;
}
metadata = _cairo_image_surface_get_metadata (surface);
_cairo_metadata_set_has_alpha (metadata, (extrasamples == 1) || (spp == 4));
_cairo_metadata_set_original_size (metadata, max_width, max_height);
raster = (uint32*) _TIFFmalloc (image_width * image_height * sizeof (uint32));
if (raster == NULL) {
cairo_surface_destroy (surface);
TIFFClose (tif);
g_object_unref (handle.istream);
g_set_error_literal (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
"Couldn't allocate memory for writing TIFF file");
return image;
}
if (TIFFReadRGBAImageOriented (tif, image_width, image_height, raster, orientation, 0)) {
guchar *surface_row;
int line_step;
int x, y, temp;
guchar r, g, b, a;
uint32 *src_pixel;
surface_row = _cairo_image_surface_flush_and_get_data (surface);
line_step = cairo_image_surface_get_stride (surface);
src_pixel = raster;
for (y = 0; y < image_height; y++) {
guchar *dest_pixel = surface_row;
if (g_cancellable_is_cancelled (cancellable))
goto stop_loading;
for (x = 0; x < image_width; x++) {
r = TIFFGetR (*src_pixel);
g = TIFFGetG (*src_pixel);
b = TIFFGetB (*src_pixel);
a = TIFFGetA (*src_pixel);
CAIRO_SET_RGBA (dest_pixel, r, g, b, a);
dest_pixel += 4;
src_pixel += 1;
}
surface_row += line_step;
}
}
stop_loading:
cairo_surface_mark_dirty (surface);
if (! g_cancellable_is_cancelled (cancellable))
gth_image_set_cairo_surface (image, surface);
_TIFFfree (raster);
cairo_surface_destroy (surface);
TIFFClose (tif);
g_object_unref (handle.istream);
return image;
}
