SkPictureImageGenerator

src/core/SkPictureImageGenerator.h

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkImageGenerator.h"
+
+#include "SkMatrix.h"
+#include "SkPaint.h"
+#include "SkRefCnt.h"
+#include "SkTLazy.h"
+
+class SkPicture;
+
+class SkPictureImageGenerator : SkImageGenerator {
+public:
+    static SkImageGenerator* create(const SkISize&, const SkPicture*, const SkMatrix*,

[reed1, 2015/07/17 18:25:42]

Create

[f(malita), 2015/07/17 18:39:01]

Done.

+                                    const SkPaint*);
+
+protected:
+    bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, SkPMColor ctable[],
+                     int* ctableCount) override;
+
+private:
+    SkPictureImageGenerator(const SkISize&, const SkPicture*, const SkMatrix*, const SkPaint*);
+
+    const SkImageInfo             fInfo;
+    SkAutoTUnref<const SkPicture> fPicture;
+    SkTLazy<SkMatrix>             fMatrix;

[reed1, 2015/07/17 18:25:42]

No real reason to make matrix lazy -- it could just be identity if the caller
didn't specify one

The paint, however, is important to know if it was NULL or not, since
drawPicture behaves very differently if it is non-null (i.e. it draws into a
layer if there is a paint).

[f(malita), 2015/07/17 18:39:01]

Done.

+    SkTLazy<SkPaint>              fPaint;
+
+    typedef SkImageGenerator INHERITED;
+};