From: Rajeev Ranjan <>

Subject: [E-devel] [PATCH][EDJE] Patch to remove the alpha from image
header while saving if the alpha is set to 1 but the image is fully

Attached to the mail is a patch to set the alpha information for an
image header to 0 with alpha present but all the texels being opaque.
Continuing to our discussion, as suggested by many people in the
community it has been implemented at edje_cc level.

Change description:
    While compiling the edc file, image data for image files is
scanned to find out whether the alpha value in header is set to 1 and
is not being used in the image.
  If this is the case, while writing to eet the alpha is set to 0 to
avoid blending for such images in the graphics pipeline when used by

SVN revision: 70954
This commit is contained in:
Rajeev Ranjan 2012-05-13 04:24:28 +00:00 committed by Carsten Haitzler
parent 262e8118b7
commit f146ce307a
3 changed files with 25 additions and 0 deletions

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@ -23,3 +23,4 @@ Prince Kumar Dubey <> <>
David Seikel <onefang at>
Mikael Sans <>
Jérôme Pinot <>
Rajeev Ranjan (Rajeev) <> <>

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@ -438,3 +438,10 @@
2012-05-10 Cedric Bail
* Preserve user box and table items during call of edje_object_file_set.
2012-04-30 Rajeev Ranjan (Rajeev)
* Add edje_cc optimization to remove alpha channel flag from images
with absolutely no alpha in them if marked as havin alpha in the

View File

@ -566,6 +566,8 @@ data_write_images(Eet_File *ef, int *image_num, int *input_bytes, int *input_raw
int im_w, im_h;
int im_alpha;
char buf[256];
unsigned int *start, *end;
Eina_Bool opaque = EINA_TRUE;
evas_object_image_size_get(im, &im_w, &im_h);
im_alpha = evas_object_image_alpha_get(im);
@ -605,6 +607,21 @@ data_write_images(Eet_File *ef, int *image_num, int *input_bytes, int *input_raw
if (qual < min_quality) qual = min_quality;
if (qual > max_quality) qual = max_quality;
if (im_alpha)
start = (unsigned int *) im_data;
end = start + (im_w * im_h);
while (start < end)
if ((*start & 0xff000000) != 0xff000000)
opaque = EINA_FALSE;
if (opaque) im_alpha = 0;
if (mode == 0)
bytes = eet_data_image_write(ef, buf,
im_data, im_w, im_h,