Hi there,
Can I extract arbitrary rectangular section out of an XIMage using
`imlib_create_image_from_ximage()' ? I guess I can, but I was unable too
so far.
I just fetched Imlib2 1.2.1.009 from CVS (this part of code is pretty
stable since its original inclusion in october 2000 anyway), and I
wonder if the `__imlib_GrabXImageToRGBA()' function is working as
expected when it comes to extracting arbitrary rectangular sections out
of an XImage: it seems the x and y parameters (12th and 13th) are just
plainly ignored when positive (just look at the first few lines setting
inx and iny), leading to always grep subimages at (0, 0) in the original
image, since ox = oy = 0 when calling from
`imlib_create_image_from_ximage()' ...
Am I misunderstanding how it is used here? The code for copying from
source to destination looks like (I took out the 32 bits, non-bgr unmasked
case since it is easy to read):
for (y = 0; y < h; y++)
{
src = (DATA32 *) (xim->data + (xim->bytes_per_line * y));
ptr = data + ((y + iny) * ow) + inx;
for (x = 0; x < w; x++)
{
*ptr++ = 0xff000000 | ((*src) & 0x00ffffff);
src++;
}
}
When I would have expected something like:
for (y = 0; y < h; y++)
{
src = (DATA32 *) (xim->data + (xim->bytes_per_line * (y + iny)) +
sizeof(DATA32) * inx);
ptr = data + (y * w);
for (x = 0; x < w; x++)
{
*ptr++ = 0xff000000 | ((*src) & 0x00ffffff);
src++;
}
}
with (inx, iny) being the coordinates of the subimage we want to grab from
the xim XImage. Thanks in advance for your pointers on this! Yours,
--
Sylvain Fourmanoit <[EMAIL PROTECTED]>
No wonder Clairol makes so much money selling shampoo.
Lather, Rinse, Repeat is an infinite loop!
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