| 95b52fd187564cabceb3309daa4ee6ddf697de58 |
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25-Feb-2017 |
Romain Guy <romainguy@google.com> |
Make Half look like and behave like a boxed instance
Bug: 35765416
Test: HalfTest
Change-Id: I7ef52428f8b4e2c05b91d7eb37cc4cb5ecc5c6b9
/frameworks/base/core/java/android/util/Half.java
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| 68bd5fdd1ad3cf0b74c225b31adf1f68393bfbb6 |
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15-Nov-2016 |
Romain Guy <romainguy@google.com> |
Introduce android.graphics.ColorSpace
This class can be used to define color spaces. A color space has a color model
and a profile connection space (CIE XYZ D50). This implementation can be used
to query various properties of RGB color spaces or perform conversions between
various color spaces (RGB, XYZ and Lab).
Refer to the documentation for more details.
Test: cts-tradefed run singleCommand cts-dev --module CtsGraphicsTestCases --test android.graphics.cts.ColorSpaceTest
Bug: 32984164
Change-Id: Ie2117c1212c1375a7d403d3c1afaf73d7c2e0b47
/frameworks/base/core/java/android/util/Half.java
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| 5d7e2352e7369ca4f75b3f883749f908cc82ecde |
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14-Nov-2016 |
Romain Guy <romainguy@google.com> |
Add @HalfFloat annotation for fp16 data types stored in shorts
This CL has a companion CL to add the @HalfFloat annotation to the
support library.
Test: cts-tradefed run singleCommand cts-dev --module CtsUtilTestCases --test android.util.cts.HalfTest
Bug: 29940137
Change-Id: I4e1dc456687c1c026437150e9cc94a54f3264d4e
/frameworks/base/core/java/android/util/Half.java
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| 12ae9a073654ee4d65ed7e5e92c1dfa801697d63 |
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05-Nov-2016 |
Romain Guy <romainguy@google.com> |
Improve support for half floats and expose as public API
Half floats (often called fp16) are commonly used to store floating
point data efficiently without having to use lossy compression schemes.
Half floats are commonly used in the following cases:
- Wide gamut colors
- Meshes (OpenGL and Vulkan)
- HDR images/textures
- Lookup tables as textures (OpenGL and Vulkan), particularly
in physically-based renderers
- Maching learning/compute
OpenGL and Renderscript both provide Java language APIs that accept
half floats but the platform offers no support to create fp16 values
from fp32 data. The Half class is an IEEE 754 compliant implementation
of half floats that can be used to feed OpenGL and Renderscript properly
encoded values. A comprehensive series of test is also added to CTS.
Test: cts-tradefed run singleCommand cts-dev --module CtsUtilTestCases --test android.util.cts.HalfTest
Bug: 29940137
Change-Id: I908bde7b3c6f65f7a24e0ab5652be4d16cc0358d
/frameworks/base/core/java/android/util/Half.java
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| de0a3a893f85afbb34a6ee83ec4a5a860230faf7 |
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20-Oct-2016 |
Romain Guy <romainguy@google.com> |
Add a half-precision floating point type
Denormals are fully supported.
This will be useful to store wide-gamut colors in a compact form
(a full RGBA color can be stored in a long using half floats for
each component).
Test: cts-tradefed run singleCommand cts-dev --module CtsUtilTestCases --test android.util.cts.HalfTest
Change-Id: I7e071edd2b66fdf6b375ce0e3e1a72ec3fb635b5
/frameworks/base/core/java/android/util/Half.java
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