start on pre-upload data

src/image/SkImage_Gpu.cpp

Index: src/image/SkImage_Gpu.cpp
diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp
index e28a31d4bf7792c457f92aa5e75f42475dcc3456..76f06660a6b184819b963b8fedc9f851173a4d5b 100644
--- a/src/image/SkImage_Gpu.cpp
+++ b/src/image/SkImage_Gpu.cpp
@@ -310,6 +310,30 @@ SkImage* SkImage::newTextureImage(GrContext *context) const {
     return create_image_from_maker(&maker, at, this->uniqueID());
 }
 
+SkImage* SkImage::NewTextureFromPixmap(GrContext* ctx, const SkPixmap& pixmap,
+                                       SkBudgeted budgeted) {
+    if (!ctx) {
+        return nullptr;
+    }
+    SkAutoTUnref<GrTexture> texture(GrUploadPixmapToTexture(ctx, pixmap));
+    if (!texture) {
+        return nullptr;
+    }
+    return new SkImage_Gpu(texture->width(), texture->height(), kNeedNewImageUniqueID,
+                           pixmap.alphaType(), texture, budgeted);
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+SkImage* SkImageTextureData::newImage(GrContext* context, SkBudgeted budgeted) const {
+    if (context->uniqueID() != fContextUniqueID) {
+        return nullptr;
+    }
+    SkPixmap pixmap;
+    fPixmapGenerator(&pixmap);
+    return SkImage::NewTextureFromPixmap(context, pixmap, budgeted);
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 GrTexture* GrDeepCopyTexture(GrTexture* src, SkBudgeted budgeted) {