[haiku-bugs] [Haiku] #11196: Tiled bitmap drawing
- From: "pulkomandy" <trac@xxxxxxxxxxxx>
- Date: Wed, 03 Sep 2014 12:02:38 -0000
#11196: Tiled bitmap drawing
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Reporter: pulkomandy | Owner: stippi
Type: enhancement | Status: new
Priority: normal | Milestone: R1
Component: Servers/app_server | Version: R1/Development
Keywords: | Blocked By:
Blocking: | Has a Patch: 0
Platform: All |
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Currently the only way to draw a tiled bitmap is to use SetViewBitmap with
the B_BITMAP_TILE option.
Some websites (eg http://amigaimpact.org) use 1x2 pixel bitmaps to draw
line patterns in most of the webpage. Currently WebKit implements this
using a loop calling DrawBitmapAsync(), but this is much slower than it
needs to be.
We already have a DrawBitmap call taking an "options" parameter. Currently
it's only used to set bilinear filtering. We could add support for
B_TILED_BITMAP as a new option bit there.
WebKit also supports a "phase" (so the top-left of the source rect may not
be drawn at the same position as the top-left of the destination rect),
and an affine transform of the source before drawing (which needs special
care to make the end result easily tileable). These two would probably
need an extension of our API.
--
Ticket URL: <https://dev.haiku-os.org/ticket/11196>
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