diff options
| author |  jvanverth <jvanverth@google.com> | 2014-11-26 13:15:59 -0800 |
|---|---|---|
| committer |  Commit bot <commit-bot@chromium.org> | 2014-11-26 13:15:59 -0800 |
| commit | 936799204b34e7a2f20ac6c0868058799ceb851e (patch) | |
| tree | c1dd34971c393de4bf7247aed276a91b123400fd /src/core/SkHalf.h | |
| parent | 9881d63c57002ffbdf2adf623965ece280279989 (diff) | |
Add float-to-half (binary16) conversion functions.
Based on code by Fabian Giesen at
https://fgiesen.wordpress.com/2012/03/28/half-to-float-done-quic/.
These will be needed for creating binary16 textures from floating point data.
BUG=skia:3103
Review URL: https://codereview.chromium.org/760753003
Diffstat (limited to 'src/core/SkHalf.h')
| -rw-r--r-- | src/core/SkHalf.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/core/SkHalf.h b/src/core/SkHalf.h new file mode 100644 index 0000000000..3fd07793e9 --- /dev/null +++ b/src/core/SkHalf.h @@ -0,0 +1,22 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkHalf_DEFINED +#define SkHalf_DEFINED + +#include "SkTypes.h" + +// 16-bit floating point value +// format is 1 bit sign, 5 bits exponent, 10 bits mantissa +// only used for storage +typedef uint16_t SkHalf; + +// convert between half and single precision floating point +float SkHalfToFloat(SkHalf h); +SkHalf SkFloatToHalf(float f); + +#endif |