Due to differing coordinate systems/pen hang items drawn with specific pixel positioned vertices don't draw the same on different platforms NOTE - this bug is supposed to be cc:'ed to saari@netscape.com but he apparently doesn't have a Bugzilla account.

*** Bug 591 has been marked as a duplicate of this bug. ***

how much work is involved in fixing this?

a) finding out where each platform defines a pixel center to be. b) per api *where pixel identity can be defined reasonably in an xp fashion*, finding out where each platform expects vertices to be. c) based on information from a and b, defining in an xp way how gfx expects these to behave. d) making each platform compliant. e) fixing all of the places that break as a result of the changes.

Inserting Milestone info.

Setting all current Open Critical and Major to M3

setting Eli as QA contact for this bug, to track and review

assigned to incorrect qa -- reassigning to Claudius

*** This bug has been marked as a duplicate of 4363 ***

kevin, the pixel coverage has been defined, we just need to make all of the platforms compliant. give me a call and i can pass on the relevant info. x3178.

Moving to M9

Ramiro, do we have a document that describes what the policy for pixel coverage is?

Moving to M10. This is next on my list after the M9 bugs.

Talked to Michael P. to clarify. He will be forwarding a email discussion which defines the pixel coverage to me. From the phone conversation: drawing a line should not cover the ending pixel. All rendering context calls which take a rect precisely define the pixel coverage through the width and height. All platforms need to honor this. WIN32's varies between fillrect and drawrect.

Moving to M11

Created a simple cross platform, pixel coverage test app so we can identify which platforms are not rendering lines and rectangles as expected. It is located in mozilla/gfx/tests/coverage.

Don, I'm reassigning this to you. Please run the gfx pixel coverage test. Once the coverage is correct on the Mac. Reassign to Ramiro to check Linux.

Got the Mac version working and added. Ramiro can you check Linux.

reassign to waqar. waqar: this is a pretty simple thing to fix. just make sure the test app runs. i think there were some issues with test apps on linux. pavlov can help you.

Mass move to M15

Moving

This is fixed, all platforms have this adjustment. I did the final adjustment on Linux and Mac has this fix.

marking VERIFIED