diff options
author | 2015-09-28 08:58:53 -0700 | |
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committer | 2015-09-28 08:58:53 -0700 | |
commit | 13f48dc85aa68a60da66aaf39c93d527d11d1278 (patch) | |
tree | 38fdaad81ebc61ca125f7e1be4c97d39bdeb5fab /include/core/SkPixelSerializer.h | |
parent | 209c1624addaa7f7e63b79d286bd350342740a00 (diff) |
change pixel-serializer to support reencoding existing data
Trying to evolve this interface so it can
- support rich set of backend-encoders (including ones like ETC1 that can cheaply convert to KXT
- allow for encoding images as well as bitmaps (e.g. for picture serialization)
- perhaps replace SkImageEncoder as an API (assuming we create a factory that returns a serializer given a format)
BUG=skia:
Review URL: https://codereview.chromium.org/1373683003
Diffstat (limited to 'include/core/SkPixelSerializer.h')
-rw-r--r-- | include/core/SkPixelSerializer.h | 42 |
1 files changed, 23 insertions, 19 deletions
diff --git a/include/core/SkPixelSerializer.h b/include/core/SkPixelSerializer.h index d089209909..4ac5253077 100644 --- a/include/core/SkPixelSerializer.h +++ b/include/core/SkPixelSerializer.h @@ -8,9 +8,10 @@ #ifndef SkPixelSerializer_DEFINED #define SkPixelSerializer_DEFINED +#include "SkData.h" +#include "SkPixmap.h" #include "SkRefCnt.h" -class SkData; struct SkImageInfo; /** @@ -18,35 +19,38 @@ struct SkImageInfo; */ class SkPixelSerializer : public SkRefCnt { public: - virtual ~SkPixelSerializer() {} - /** - * Call to determine if the client wants to serialize the encoded data. If - * false, serialize another version (e.g. the result of encodePixels). + * Call to determine if the client wants to serialize the encoded data. + * + * If the encoded data is can be re-encoded (or taken as is), this returns a ref to a data + * with the result, which the caller must unref() when they are through. The returned + * data may be the same as the input, or it may be different, but either way the caller is + * responsible for calling unref() on it. + * + * If the encoded data is not acceptable to this pixel serializer, this returns NULL. */ - bool useEncodedData(const void* data, size_t len) { - return this->onUseEncodedData(data, len); - } + SkData* reencodeData(SkData* encoded); /** * Call to get the client's version of encoding these pixels. If it * returns NULL, serialize the raw pixels. */ - SkData* encodePixels(const SkImageInfo& info, const void* pixels, size_t rowBytes) { - return this->onEncodePixels(info, pixels, rowBytes); - } + SkData* encodePixels(const SkImageInfo& info, const void* pixels, size_t rowBytes); -protected: /** - * Return true if you want to serialize the encoded data, false if you want - * another version serialized (e.g. the result of encodePixels). + * Call to get the client's version of encoding these pixels. If it + * returns NULL, serialize the raw pixels. */ - virtual bool onUseEncodedData(const void* data, size_t len) = 0; + SkData* encodePixels(const SkPixmap& pixmap); + +protected: + // DEPRECATED -- this is no longer called, so remove from your subclasses! + virtual bool onUseEncodedData(const void*, size_t) { return true; } + + virtual SkData* onReencodeData(SkData* encoded) { + return SkRef(encoded); + } - /** - * If you want to encode these pixels, return the encoded data as an SkData - * Return null if you want to serialize the raw pixels. - */ virtual SkData* onEncodePixels(const SkImageInfo&, const void* pixels, size_t rowBytes) = 0; }; #endif // SkPixelSerializer_DEFINED |