Simplify flattening to just write enough to call the factory/public-constructor for the class. We want to *not* rely on private constructors, and not rely on calling through the inheritance hierarchy for either flattening or unflattening(CreateProc).
Refactoring pattern:
1. guard the existing constructor(readbuffer) with the legacy build-flag
2. If you are a instancable subclass, implement CreateProc(readbuffer) to create a new instances from the buffer params (or return NULL).
If you're a shader subclass
1. You must read/write the local matrix if your class accepts that in its factory/constructor, else ignore it.
R=robertphillips@google.com, mtklein@google.com, senorblanco@google.com, senorblanco@chromium.org, sugoi@chromium.org
Author: reed@google.com
Review URL: https://codereview.chromium.org/395603002
diff --git a/src/effects/gradients/SkLinearGradient.cpp b/src/effects/gradients/SkLinearGradient.cpp
index 4f85da3..9d939bf 100644
--- a/src/effects/gradients/SkLinearGradient.cpp
+++ b/src/effects/gradients/SkLinearGradient.cpp
@@ -60,11 +60,25 @@
pts_to_unit_matrix(pts, &fPtsToUnit);
}
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
SkLinearGradient::SkLinearGradient(SkReadBuffer& buffer)
: INHERITED(buffer)
, fStart(buffer.readPoint())
, fEnd(buffer.readPoint()) {
}
+#endif
+
+SkFlattenable* SkLinearGradient::CreateProc(SkReadBuffer& buffer) {
+ DescriptorScope desc;
+ if (!desc.unflatten(buffer)) {
+ return NULL;
+ }
+ SkPoint pts[2];
+ pts[0] = buffer.readPoint();
+ pts[1] = buffer.readPoint();
+ return SkGradientShader::CreateLinear(pts, desc.fColors, desc.fPos, desc.fCount,
+ desc.fTileMode, desc.fGradFlags, desc.fLocalMatrix);
+}
void SkLinearGradient::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);