Layers require that drawing methods potentially
draw in more than one bitmaps.
To handle this this patch offers the following:
- move all drawing methods to use Drawable
- Drawables are now handled by GcSnapshot since
its the one handling the layers
- moved Canvas_Delegate.createCustomGraphics to
GcSnapshot which does not expose the Graphics2D
objects anymore so its draw() methods are the only
way to draw.
- handles creating layers in GcSnapshot.save() and
blitting them in restore()
Other changes:
- Clean up the create/save API in GcSnapshot
- Fixed drawing bitmaps with alpha and other
composite modes.
Change-Id: I1e230087493d044a10de71f4b6d29083e3f3bf64
- always set up the stroke. Paint may not have the proper
style when drawing lines. stroke should still be setup.
- Fixed vertical linear gradient. Old code generated
a gradient ratio of NaN
- Fixed alpha rendering when using shaders. In that
case the alpha channel from the paint color should be
used in conjunction with the shader.
- Fixed miter limit. Java expects the value to be multiplied
by the stroke width
- Fixed support for drawing ALPHA_8 bitmaps. Java2D doesn't
have bitmaps with only alpha channels, so we keep using
ARGB bitmaps but when drawing them into a bitmap we erase
the color information.
Change-Id: I4f04341fc843e3f7dadd1fdbf709b11a4f1e24b9
Also created delegates for all missing shader, xfermode
and patheffect classes. Moved the logic of the xfermode,
and patheffects that was in Canvas_Delegate into the
xfermode/patheffect classes, and added support (in all
3 clases) for knowing if the shader/xfermode/patheffect
is actually supported or not. Make use of fidelityWarning
in LayoutLog if they are not.
The goal is use the app to test layout lib, so layout
files are needed, and custom views must be instantiable
(ie public)
Change-Id: I46bb3d8af6e4d7973d041aa618f1c7762efd93d0
