[haiku-bugs] [Haiku] #10491: Alpha channel not initialized before copy to clipboard
- From: "humdinger" <trac@xxxxxxxxxxxx>
- Date: Thu, 30 Jan 2014 11:32:48 -0000
#10491: Alpha channel not initialized before copy to clipboard
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Reporter: humdinger | Owner: nobody
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Applications/Screenshot | Version: R1/Development
Keywords: | Blocked By:
Blocking: | Has a Patch: 0
Platform: All |
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This is hrev46754.
If I take a screenshot of Web+ showing e.g. the GMail web interface, the
Screenshot app's preview shows everything alright. When I save it as PNG,
the resulting image is also alright. But if I copy the screenshot to the
clipboard instead, and paste it into WonderBrush, I get these transparent
areas:
[[Image(gmail.png)]]
Here is stippi's quick analysis in IRC (30.01.2014):
[11:25] <stippi> It should make sure to init the alpha channel when it
saves window contents.
[11:26] <stippi> Because from app_server, you get B_RGB32, not B_RGBA32,
if memory serves. It means the alpha channel could contain random garbage
and should be ignored.
[11:27] <stippi> It does look a bit like there is an integer overflow
somewhere in the drawing code.
[11:27] <stippi> Whcih would be another bug.
[11:27] <stippi> One that doesn't have much of any effect, though.
(Note: I don't know if it's relevant, but stippi said "''init the alpha
channel when it saves window contents''". As I said, saving as file does
work, only copying to the clipborad results in the described issue.)
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Ticket URL: <https://dev.haiku-os.org/ticket/10491>
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