320510 - Canvas renders gif image with mask incorrectly

Status: RESOLVED WORKSFORME

(Core :: Graphics: Canvas2D, defect)

Description

[Eric Hammervold]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20051215 Firefox/1.6a1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20051215 Firefox/1.6a1

When inserting an gif image with a transparency mask canvas renders the mask incorrectly, it looks as though it is inverting the x-axis starting point of the mask and the edges of the image are displayed in a jagged sissor pattern.

Reproducible: Always

Steps to Reproduce:
1. var testimg = new Image();
2. testimg.src = "images/test.gif";
3. ctx.drawImage(testimg,50,50,214,214);

Comment 1

[Peter van der Woude [:Peter6]]

attach testcase please

Comment 2

[Peter van der Woude [:Peter6]]

Attachment: image for testcase

testcase next

Comment 3

[Peter van der Woude [:Peter6]]

Attachment: testcase

Comment 4

[Peter van der Woude [:Peter6]]

Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9a1) Gecko/20051220 Firefox/1.6a1 ID:2005122023

Confirmed
->New

Comment 5

[Erryn Pollock]

*** Bug 330478 has been marked as a duplicate of this bug. ***

Comment 6

[:Gijs (he/him)]

Note also bug 332454.

Comment 7

[Philip Taylor]

This seems fixed for me in 1.8.1 (Mozilla/5.0 (Windows; U; Windows NT 5.0; en-GB; rv:1.8.1b1) Gecko/20060710 Firefox/2.0b1). The test cases in bug 330478 and bug 332454 also work.

Probably related to "the handling of 1-bit images is horked (bits are packed backwards).  I'll fix." comment in bug 329598.

Comment 8

[Chris Thomas (CTho) [formerly [e-mail] [e-mail]]]

*** Bug 332454 has been marked as a duplicate of this bug. ***

Comment 9

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Fixed in trunk