On Fri, 2002-07-26 at 23:04, AKILA M wrote:
hello,
i create a pixmap from a png file using the following API
pixbuf = gdk_pixbuf_new_from_file("filename.png");
gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &mask, 127);
image = gtk_pixmap_new(pixmap, mask);
i put the image in an event box and display it in a fixed
container. My problem is that i get a white backgroud in the image. i have
^^^^^^^^^^^^^^^^ Umm, you're getting a white background because that's what's in the png file (ie there's no transparency in the png)! Evolution shows transparent pngs properly, and this one shows up as a blue circle on a white background. I loaded the png into the gimp and added an alpha channel and changed the white into transparent. The new png is attached. Try it and see if it doesn't show up as transparent. By the way, you might want to use a GtkDrawingArea widget instead of just an event box. Then you can render the GdkPixbuf to it with fill alpha blending, instead of just a threshold transparency level. Michael
read the previous discussions on this problem(one posted 2 days earlier).
i can't use
gtk_image_from_new_file (GTK2.0)
since i use gtk1.2.8. i create the png image file using XPaint. i
alternatively use gimp also. but the background is the same white. i have
tried converting png to xpm file. i also found out this(background in
white) doesnot happen with xpm files stored in buffers...and can be used
in API
pixmap = gdk_pixmap_create_from_xpm_d(fcontainer->window,
&mask,
&style->bg[GTK_STATE_NORMAL],
buffer_xpm);
But i want to know how i can get transparent background in png
files.(using GTK1.2.8)
Any help would be very useful....
i have attached a sample png file with this.."dot_circle.png"
Thankx a lot
akila
******************************************************************************
M. Akila,
Central Research Laboratory,
Bharat Electronics,
Jalahalli,
Bangalore.
Ph.No (off): 91-080-8381125
E-Mail Id : akila crlbel ernet in
HAVE A NICE DAY
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