Index: include/core/SkImageGenerator.h |
diff --git a/include/core/SkImageGenerator.h b/include/core/SkImageGenerator.h |
new file mode 100644 |
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+++ b/include/core/SkImageGenerator.h |
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+/* |
+ * Copyright 2013 Google Inc. |
+ * |
+ * Use of this source code is governed by a BSD-style license that can be |
+ * found in the LICENSE file. |
+ */ |
+ |
+#ifndef SkImageGenerator_DEFINED |
+#define SkImageGenerator_DEFINED |
+ |
+#include "SkImageInfo.h" |
+ |
+class SkData; |
+ |
+/** |
+ * An interface that allows a purgable PixelRef to re-decode an image. |
+ */ |
+class SkImageGenerator { |
+public: |
+ virtual ~SkImageGenerator() { } |
+ |
+ /** |
+ * Return a ref to the encoded (i.e. compressed) representation, |
+ * of this data. |
+ * |
+ * If non-NULL is returned, the caller is responsible for calling |
+ * unref() on the data when it is finished. |
+ */ |
+ virtual SkData* refEncodedData() { return NULL; } |
+ |
+ /** |
+ * Return some information about the image, allowing the owner fo |
scroggo
2013/11/19 22:19:27
of*
hal.canary
2013/11/20 00:07:10
Done.
|
+ * this ojbect to allocate pixels. |
scroggo
2013/11/19 22:19:27
object*
hal.canary
2013/11/20 00:07:10
Done.
|
+ * |
+ * @return false if anything goes wrong. |
+ */ |
+ virtual bool getInfo(SkImageInfo* info) = 0; |
+ |
+ /** |
+ * Decode into the given pixels, a block of memory of size at |
+ * least (info.fHeight - 1) * rowBytes + (info.fWidth * |
+ * bytesPerPixel) |
+ * |
+ * @param info Should be identical to the info returned by |
+ * getInfo so that the implementation can confirm that the |
+ * caller knows what it is asking for (config, size). |
+ * This contract also allows the caller to specify |
+ * different output-configs, which the implementation can |
+ * decide to support or not. |
+ * |
+ * @return false if anything goes wrong. |
+ */ |
+ virtual bool getPixels(const SkImageInfo& info, |
+ void* pixels, |
+ size_t rowBytes) = 0; |
+}; |
+ |
+#endif // SkImageGenerator_DEFINED |