Commit Graph

4 Commits

Author SHA1 Message Date
Romain Guy
c7dacca008 Documentation for PorterDuffXfermode
It tooks 10 years, but better late than never!

Bug: 32984164
Test: Compiled documentation and checked in Chrome
Change-Id: I6dfd7fba6d3077f8c774b203589083bdbc15f9d2
2017-03-31 18:56:37 -07:00
Romain Guy
9505a65527 Add new RGBA_F16 bitmap config
This configuration uses 64 bits per pixel. Heach component is stored as a
half precision float value (16 bits). Half floats can be decoded/encoded
using android.util.Half.

RGBA_F16 bitmaps are used to decode wide-gamut images stored in 16 bit
formats (PNG 16 bit for instance). aapt is currently not aware of PNG
16 bits so such files must be placed in raw/ resource directories.

This first pass provides only partial drawing support with hardware
acceleration. RGBA_F16 bitmaps are stored in linear space and need
to be encoded to gamma space with the appropriate OETF to be rendered
properly on Android's current surfaces. They are however suitable for
linear blending. Full rendering support will be provided in a future
CL (BitmapShaders might be a bit tricky to handle properly during
shader generation).

Bug: 32984164
Test: bit CtsGraphicsTestCases:android.graphics.cts.BitmapRGBAF16Test

Change-Id: I328e6b567441a1b9d152a3e7be944a2cf63193bd
2016-12-16 09:15:07 -08:00
Romain Guy
15296a2d34 Add API to visualize/debug/compare color spaces and colors
ColorSpace.createRenderer() returns a ColorSpace.Renderer which
can be used to visualize multiple color spaces and colors (each
associated with a specific color space) in the same CIE 1931 xyY
chromaticity diagram. This API was used to generate all the
diagrams shown in the documentation.

Bug: 32984164
Test: ColorSpaceTest in CTS
Change-Id: Ic94d939d5cfd563d826701f5e876b67b47ed56ec
2016-11-30 09:33:28 -08:00
Romain Guy
199e5a98dd Add images to document built-in color spaces
Bug: 32984164
Test: make offline-sdk-referenceonly-docs and manual validation of output

Change-Id: I2f0e00e5a0581517bb7c535e8aee150f87ac7a6e
2016-11-28 17:38:27 -08:00