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- /*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef GrYUVProvider_DEFINED
- #define GrYUVProvider_DEFINED
- #include <include/private/GrTypesPriv.h>
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkYUVAIndex.h"
- #include "include/core/SkYUVASizeInfo.h"
- #include "include/gpu/GrTypes.h"
- class GrBackendFormat;
- class GrRecordingContext;
- struct GrSurfaceDesc;
- class GrTexture;
- class GrTextureProxy;
- class SkCachedData;
- /**
- * There are at least 2 different ways to extract/retrieve YUV planar data...
- * - SkPixelRef
- * - SkImageGenerator
- *
- * To share common functionality around using the planar data, we use this abstract base-class
- * to represent accessing that data.
- */
- class GrYUVProvider {
- public:
- virtual ~GrYUVProvider() {}
- /**
- * On success, this returns a texture proxy that has converted the YUV data from the provider
- * into a form that is supported by the GPU (typically transformed into RGB). The texture will
- * automatically have a key added, so it can be retrieved from the cache (assuming it is
- * requested by a provider w/ the same genID). If srcColorSpace and dstColorSpace are
- * specified, then a color conversion from src to dst will be applied to the pixels.
- *
- * On failure (e.g. the provider had no data), this returns NULL.
- */
- sk_sp<GrTextureProxy> refAsTextureProxy(GrRecordingContext*,
- const GrSurfaceDesc&,
- GrColorType colorType,
- SkColorSpace* srcColorSpace,
- SkColorSpace* dstColorSpace);
- sk_sp<SkCachedData> getPlanes(SkYUVASizeInfo*, SkYUVAIndex[SkYUVAIndex::kIndexCount],
- SkYUVColorSpace*, const void* planes[SkYUVASizeInfo::kMaxCount]);
- private:
- virtual uint32_t onGetID() const = 0;
- // These are not meant to be called by a client, only by the implementation
- /**
- * If decoding to YUV is supported, this returns true. Otherwise, this
- * returns false and does not modify any of the parameters.
- *
- * @param sizeInfo Output parameter indicating the sizes and required
- * allocation widths of the Y, U, V, and A planes.
- * @param yuvaIndices How the YUVA planes are used/organized
- * @param colorSpace Output parameter.
- */
- virtual bool onQueryYUVA8(SkYUVASizeInfo* sizeInfo,
- SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
- SkYUVColorSpace* colorSpace) const = 0;
- /**
- * Returns true on success and false on failure.
- * This always attempts to perform a full decode. If the client only
- * wants size, it should call onQueryYUVA8().
- *
- * @param sizeInfo Needs to exactly match the values returned by the
- * query, except the WidthBytes may be larger than the
- * recommendation (but not smaller).
- * @param yuvaIndices How the YUVA planes are used/organized
- * @param planes Memory for each of the Y, U, V, and A planes.
- */
- virtual bool onGetYUVA8Planes(const SkYUVASizeInfo& sizeInfo,
- const SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
- void* planes[]) = 0;
- // This is used as release callback for the YUV data that we capture in an SkImage when
- // uploading to a gpu. When the upload is complete and we release the SkImage this callback will
- // release the underlying data.
- static void YUVGen_DataReleaseProc(const void*, void* data);
- };
- #endif
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