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Preserve the aspect ratio. (#118145, Owen Taylor)

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2003-07-24  Matthias Clasen  <maclas@gmx.de>

	* gdk-pixbuf-io.c (gdk_pixbuf_new_from_file_at_size): Preserve the aspect ratio.  (#118145,
	Owen Taylor)
This commit is contained in:
Matthias Clasen 2003-07-23 22:55:34 +00:00 committed by Matthias Clasen
parent 3264c0b679
commit b8118e6507
2 changed files with 40 additions and 2 deletions
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5
gdk-pixbuf/ChangeLog
View File

@ -1,3 +1,8 @@
2003-07-24 Matthias Clasen <maclas@gmx.de>
* gdk-pixbuf-io.c (gdk_pixbuf_new_from_file_at_size): Preserve the aspect ratio. (#118145,
Owen Taylor)
2003-07-23 Matthias Clasen <maclas@gmx.de>
* gdk-pixbuf-io.c (gdk_pixbuf_new_from_file_at_size): Close loader before unref'ing

37
gdk-pixbuf/gdk-pixbuf-io.c
View File

@ -773,6 +773,31 @@ gdk_pixbuf_new_from_file (const char *filename,
return pixbuf;
}
static void
size_prepared_cb (GdkPixbufLoader *loader,
int width,
int height,
gpointer data)
{
struct {
int width;
int height;
} *info = data;
g_return_if_fail (width > 0 && height > 0);
if ((double)height * (double)info->width >
(double)width * (double)info->height) {
width = 0.5 + (double)width * (double)info->height / (double)height;
height = info->height;
} else {
height = 0.5 + (double)height * (double)info->width / (double)width;
width = info->width;
}
gdk_pixbuf_loader_set_size (loader, width, height);
}
/**
* gdk_pixbuf_new_from_file_at_size:
* @filename: Name of file to load.
@ -783,7 +808,7 @@ gdk_pixbuf_new_from_file (const char *filename,
* Creates a new pixbuf by loading an image from a file. The file format is
* detected automatically. If %NULL is returned, then @error will be set.
* Possible errors are in the #GDK_PIXBUF_ERROR and #G_FILE_ERROR domains.
* The image will be scaled to the requested size.
* The image will be scaled to fit in the requested size, preserving its aspect ratio.
*
* Return value: A newly-created pixbuf with a reference count of 1, or %NULL if
* any of several error conditions occurred: the file could not be opened,
@ -804,6 +829,10 @@ gdk_pixbuf_new_from_file_at_size (const char *filename,
guchar buffer [4096];
int length;
FILE *f;
struct {
gint width;
gint height;
} info;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (width > 0 && height > 0, NULL);
@ -819,7 +848,11 @@ gdk_pixbuf_new_from_file_at_size (const char *filename,
}
loader = gdk_pixbuf_loader_new ();
gdk_pixbuf_loader_set_size (loader, width, height);
info.width = width;
info.height = height;
g_signal_connect (loader, "size-prepared", G_CALLBACK (size_prepared_cb), &info);
while (!feof (f)) {
length = fread (buffer, 1, sizeof (buffer), f);