diff options
author | sugoi <sugoi@chromium.org> | 2014-10-09 05:27:23 -0700 |
---|---|---|
committer | Commit bot <commit-bot@chromium.org> | 2014-10-09 05:27:23 -0700 |
commit | ce686270f533b9d741ef85661ef9d78517a01b86 (patch) | |
tree | c89179e16db02dfea5042aa51fff79fc129e643d /include | |
parent | 9e61bb7815b133bc40ea7b00fccc853f4b728e3c (diff) |
Adding 3D lut color filter
Included in this cl is support for 3D textures.
BUG=skia:
Review URL: https://codereview.chromium.org/580863004
Diffstat (limited to 'include')
-rw-r--r-- | include/effects/SkColorCubeFilter.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/include/effects/SkColorCubeFilter.h b/include/effects/SkColorCubeFilter.h new file mode 100644 index 0000000000..2cfee45e9c --- /dev/null +++ b/include/effects/SkColorCubeFilter.h @@ -0,0 +1,79 @@ +/* + * 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 SkColorCubeFilter_DEFINED +#define SkColorCubeFilter_DEFINED + +#include "SkColorFilter.h" +#include "SkData.h" + +class SK_API SkColorCubeFilter : public SkColorFilter { +public: + /** cubeData must containt a 3D data in the form of cube of the size: + * cubeDimension * cubeDimension * cubeDimension * sizeof(SkColor) + * This cube contains a transform where (x,y,z) maps to the (r,g,b). + * The alpha components of the colors are ignored (treated as 0xFF). + */ + static SkColorFilter* Create(SkData* cubeData, int cubeDimension); + + virtual void filterSpan(const SkPMColor src[], int count, SkPMColor[]) const SK_OVERRIDE; + virtual uint32_t getFlags() const SK_OVERRIDE; + +#if SK_SUPPORT_GPU + virtual GrFragmentProcessor* asFragmentProcessor(GrContext*) const SK_OVERRIDE; +#endif + + SK_TO_STRING_OVERRIDE() + SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkColorCubeFilter) + +protected: + SkColorCubeFilter(SkData* cubeData, int cubeDimension); +#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING + SkColorCubeFilter(SkReadBuffer& buffer); +#endif + virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; + +private: + /** The cache is initialized on-demand when getProcessingLuts is called. + */ + class ColorCubeProcesingCache { + public: + ColorCubeProcesingCache(int cubeDimension); + + void getProcessingLuts(const int* (*colorToIndex)[2], + const SkScalar* (*colorToFactors)[2], + const SkScalar** colorToScalar); + + int cubeDimension() const { return fCubeDimension; } + + private: + // Working pointers. If any of these is NULL, + // we need to recompute the corresponding cache values. + int* fColorToIndex[2]; + SkScalar* fColorToFactors[2]; + SkScalar* fColorToScalar; + + SkAutoMalloc fLutStorage; + + const int fCubeDimension; + + // Make sure we only initialize the caches once. + SkMutex fLutsMutex; + bool fLutsInited; + + static void initProcessingLuts(ColorCubeProcesingCache* cache); + }; + + SkAutoDataUnref fCubeData; + int32_t fUniqueID; + + mutable ColorCubeProcesingCache fCache; + + typedef SkColorFilter INHERITED; +}; + +#endif |