28345 2009-08-15 19:08:21 -0700 [GTK] BitmapImage::getGdkPixbuf does not handle alpha channels properly 2009-08-23 00:18:54 -0700 1 1 1 Unclassified WebKit WebKitGTK 528+ (Nightly build) PC Linux RESOLVED FIXED P2 Normal --- 28346 0 mrobinson webkit-unassigned krit xan.lopez oldest_to_newest 140508 0 mrobinson 2009-08-15 19:08:21 -0700 Cairo surfaces store their information in CAIRO_FORMAT_ARGB32, while GdkPixbufs store their information in GDK_COLORSPACE_RGB. The current conversion process between the two types leads to transparency corruption on some images. 140509 1 34910 mrobinson 2009-08-15 19:17:56 -0700 Created attachment 34910 Fix conversion I've attached a patch fixing this issue. 140512 2 mrobinson 2009-08-15 19:33:33 -0700 Sorry to spam this bug, but I wanted to mention that this is reproducible by enabling images as cursors with the patch from #28346 and visiting: http://www.worldtimzone.com/mozilla/testcase/css3cursors.html and trying the red cursor at the bottom. 140899 3 34910 eric 2009-08-17 17:17:04 -0700 Comment on attachment 34910 Fix conversion rowstride should probably be rowStride according to webkit style. Are you sure there aren't gtk functions which abstract this? +#if G_BYTE_ORDER == G_LITTLE_ENDIAN + guchar alpha = source[3]; + dest[0] = alpha ? ((source[2] * 255) / alpha) : 0; + dest[1] = alpha ? ((source[1] * 255) / alpha) : 0; + dest[2] = alpha ? ((source[0] * 255) / alpha) : 0; + dest[3] = alpha; +#else Seems silly to make every program check those ifdefs. 140914 4 mrobinson 2009-08-17 17:29:20 -0700 Perhaps more recent versions of GTK+ or GDK have added functionality to accomplish this, but I could not find it. For reference here is an example where Abiword does something very similar: http://google.com/codesearch/p?hl=en&sa=N&cd=1&ct=rc#gQXpoyUxBIc/abiword-2.5.0/goffice-bits/goffice/utils/go-image.c&q=cairo_to_pixbuf&l=327 141013 5 35016 mrobinson 2009-08-17 23:02:23 -0700 Created attachment 35016 Patch with variable names according to conventions This patch aligns variable names according to WebKit conventions. 142198 6 35016 xan.lopez 2009-08-23 00:11:44 -0700 Comment on attachment 35016 Patch with variable names according to conventions This looks good to me, and on top of fixing a bug it manages to do the data conversion on the client side. There's a NULL where we should use 0, but I'll fix that when landing. 142199 7 xan.lopez 2009-08-23 00:18:54 -0700 Committed as r47689, closing. 34910 2009-08-15 19:17:56 -0700 2009-08-17 23:02:23 -0700 Fix conversion 0001-Correct-conversion-of-cairo_surface_t-to-GdkPixbuf.patch text/plain 5065 mrobinson RnJvbSA1YzExZjQ1NjIwMDNhM2MwNDczOGMzZDk2Mjc0ODlkYjVhYjgxNWRmIE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBNYXJ0aW4gUm9iaW5zb24gPG1hcnRpbi5qYW1lcy5yb2JpbnNv bkBnbWFpbC5jb20+CkRhdGU6IFNhdCwgMTUgQXVnIDIwMDkgMTk6MDg6NDcgLTA3MDAKU3ViamVj dDogW1BBVENIXSBDb3JyZWN0IGNvbnZlcnNpb24gb2YgY2Fpcm9fc3VyZmFjZV90KiB0byBHZGtQ aXhidWYqCgotLS0KIFdlYkNvcmUvQ2hhbmdlTG9nICAgICAgICAgICAgICAgICAgICAgICAgICB8 ICAgMTcgKysrKysrKwogV2ViQ29yZS9wbGF0Zm9ybS9ncmFwaGljcy9ndGsvSW1hZ2VHdGsuY3Bw IHwgICA3MyArKysrKysrKysrKysrKysrKysrKysrLS0tLS0tCiAyIGZpbGVzIGNoYW5nZWQsIDc0 IGluc2VydGlvbnMoKyksIDE2IGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL1dlYkNvcmUvQ2hh bmdlTG9nIGIvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggZTkwYzIzMy4uNThmOTExYSAxMDA2NDQK 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