Sk_API for SkImageGenerator and SkInstallDiscardablePixelRef
Added SK_API to SkImageGenerator (already in include/).
Moved SkDiscardablePixelRef::Install to SkInstallDiscardablePixelRef,
added SK_API to that function, and moved declaration to
SkImageGenerator.h
This keeps the SkDiscardablePixelRef internal to Skia, but exposes a
method to install it into a bitmap.
Modifed tests that rely on this functio to use new version.
BUG=
R=mtklein@google.com, reed@google.com
Review URL: https://codereview.chromium.org/111713002
git-svn-id: http://skia.googlecode.com/svn/trunk/include@12612 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/core/SkImageGenerator.h b/core/SkImageGenerator.h
index c56e62a..d56f8f8 100644
--- a/core/SkImageGenerator.h
+++ b/core/SkImageGenerator.h
@@ -8,15 +8,43 @@
#ifndef SkImageGenerator_DEFINED
#define SkImageGenerator_DEFINED
+#include "SkDiscardableMemory.h"
#include "SkImageInfo.h"
+class SkBitmap;
class SkData;
+class SkImageGenerator;
+
+/**
+ * Takes ownership of SkImageGenerator. If this method fails for
+ * whatever reason, it will return false and immediatetely delete
+ * the generator. If it succeeds, it will modify destination
+ * bitmap.
+ *
+ * If this fails or when the SkDiscardablePixelRef that is
+ * installed into destination is destroyed, it will call
+ * SkDELETE() on the generator. Therefore, generator should be
+ * allocated with SkNEW() or SkNEW_ARGS().
+ *
+ * @param destination Upon success, this bitmap will be
+ * configured and have a pixelref installed.
+ *
+ * @param factory If not NULL, this object will be used as a
+ * source of discardable memory when decoding. If NULL, then
+ * SkDiscardableMemory::Create() will be called.
+ *
+ * @return true iff successful.
+ */
+SK_API bool SkInstallDiscardablePixelRef(SkImageGenerator* generator,
+ SkBitmap* destination,
+ SkDiscardableMemory::Factory* factory = NULL);
+
/**
* An interface that allows a purgeable PixelRef (such as a
* SkDiscardablePixelRef) to decode and re-decode an image as needed.
*/
-class SkImageGenerator {
+class SK_API SkImageGenerator {
public:
/**
* The PixelRef which takes ownership of this SkImageGenerator
