Closed Bug 87153 Opened 23 years ago Closed 23 years ago

Transparent PNG canvas color visible on different colors

Categories

(Core :: Graphics: ImageLib, defect)

x86
Windows 98
defect
Not set
normal

Tracking

()

VERIFIED DUPLICATE of bug 84980

People

(Reporter: SkewerMZ, Assigned: pavlov)

Details

Attachments

(2 files)

Procedure: Load the testcase. The testing procedure places a PNG image with 100% transparency set to a bright green color on a range of different colors. Expected: Areas with 100% transparency are displayed 100% transparent. When the image is placed on top of a background that is #CCCCCC, the transparent areas should change to #CCCCCC, and nothing else. Actual: The browser mixes the 100% transparent areas with the colors beneath the image. The transparent color is #00FF00, but when placed on top of a background that is #CCCCCC, the transparent areas will change to #CCFFCC. In other words, the browser will make each of the red, green, and blue values in the transparent area lighter but not darker. Ironically, the infamous PNG renderer in IE5.5 actually displays the testcase correctly. Build: 2001062004 Win98.
Attached image Transparent PNG image (deleted) —
Attached file Transparent PNG testcase (click this) (deleted) —
DUP of bug 84980 *** This bug has been marked as a duplicate of 84980 ***
Status: NEW → RESOLVED
Closed: 23 years ago
Resolution: --- → DUPLICATE
Verified Duplicate
Status: RESOLVED → VERIFIED
You need to log in before you can comment on or make changes to this bug.

Attachment

General

Creator:
Created:
Updated:
Size: