Use SkTransferFunctionBehavior in SkImageGenerator

This fixes SkColorSpaceXformCanvas gms that expect
non-linear premuls from the codec.

BUG=skia:

Change-Id: I5dc236d0cd760c23605a26e9c33ddb18955f9231
Reviewed-on: https://skia-review.googlesource.com/10164
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Matt Sarett <msarett@google.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/core/SkImageGenerator.h b/include/core/SkImageGenerator.h
index 6263dee574..8624359e1a 100644
--- a/include/core/SkImageGenerator.h
+++ b/include/core/SkImageGenerator.h
@@ -177,6 +177,23 @@ protected:
         return false;
     }
 
+    struct Options {
+        Options()
+            : fColorTable(nullptr)
+            , fColorTableCount(nullptr)
+            , fBehavior(SkTransferFunctionBehavior::kRespect)
+        {}
+
+        SkPMColor*                 fColorTable;
+        int*                       fColorTableCount;
+        SkTransferFunctionBehavior fBehavior;
+    };
+    bool getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, const Options* opts);
+    virtual bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
+                             const Options& opts) {
+        return this->onGetPixels(info, pixels, rowBytes, opts.fColorTable, opts.fColorTableCount);
+    }
+
 #if SK_SUPPORT_GPU
     virtual sk_sp<GrTextureProxy> onGenerateTexture(GrContext*, const SkImageInfo&,
                                                     const SkIPoint&);
@@ -186,6 +203,8 @@ private:
     const SkImageInfo fInfo;
     const uint32_t fUniqueID;
 
+    friend class SkImageCacherator;
+
     // This is our default impl, which may be different on different platforms.
     // It is called from NewFromEncoded() after it has checked for any runtime factory.
     // The SkData will never be NULL, as that will have been checked by NewFromEncoded.