Initial error handling code

src/effects/SkColorFilters.cpp

Index: src/effects/SkColorFilters.cpp
diff --git a/src/effects/SkColorFilters.cpp b/src/effects/SkColorFilters.cpp
index 41a201ef39559fc232e10319c3a9e65f20c39c8c..da9db9a84f185b89925e555780ed71936d0a2f01 100644
--- a/src/effects/SkColorFilters.cpp
+++ b/src/effects/SkColorFilters.cpp
@@ -13,6 +13,7 @@
 #include "SkFlattenableBuffers.h"
 #include "SkUtils.h"
 #include "SkString.h"
+#include "SkValidationUtils.h"
 
 #define ILLEGAL_XFERMODE_MODE   ((SkXfermode::Mode)-1)
 
@@ -98,6 +99,7 @@ protected:
         fColor = buffer.readColor();
         fMode = (SkXfermode::Mode)buffer.readUInt();
         this->updateCache();
+        buffer.validate(SkIsValidMode(fMode));
     }
 
 private:
@@ -534,6 +536,54 @@ SkColorFilter* SkColorFilter::CreateLightingFilter(SkColor mul, SkColor add) {
     return SkNEW_ARGS(SkLightingColorFilter, (mul, add));
 }
 
+SkFlattenable::Factory SkColorFilter::GetFactory(SkFlattenable::Type type) {
+    switch(type) {
+    case SkFlattenable::kSkLightingColorFilter_Type:
+        return SkLightingColorFilter::CreateProc;
+    case SkFlattenable::kSkLightingColorFilter_JustAdd_Type:
+        return SkLightingColorFilter_JustAdd::CreateProc;
+    case SkFlattenable::kSkLightingColorFilter_JustMul_Type:
+        return SkLightingColorFilter_JustMul::CreateProc;
+    case SkFlattenable::kSkLightingColorFilter_NoPin_Type:
+        return SkLightingColorFilter_NoPin::CreateProc;
+    case SkFlattenable::kSkLightingColorFilter_SingleMul_Type:
+        return SkLightingColorFilter_SingleMul::CreateProc;
+    case SkFlattenable::kSkModeColorFilter_Type:
+        return SkModeColorFilter::CreateProc;
+    case SkFlattenable::kSrc_SkModeColorFilter_Type:
+        return Src_SkModeColorFilter::CreateProc;
+    case SkFlattenable::kSrcOver_SkModeColorFilter_Type:
+        return SrcOver_SkModeColorFilter::CreateProc;
+    default:
+        break;
+    }
+    return NULL;
+}
+
+SkFlattenable::TypeCheck SkColorFilter::GetTypeCheck(SkFlattenable::Type type) {
+    switch(type) {
+    case SkFlattenable::kSkLightingColorFilter_Type:
+        return SkLightingColorFilter::IsA;
+    case SkFlattenable::kSkLightingColorFilter_JustAdd_Type:
+        return SkLightingColorFilter_JustAdd::IsA;
+    case SkFlattenable::kSkLightingColorFilter_JustMul_Type:
+        return SkLightingColorFilter_JustMul::IsA;
+    case SkFlattenable::kSkLightingColorFilter_NoPin_Type:
+        return SkLightingColorFilter_NoPin::IsA;
+    case SkFlattenable::kSkLightingColorFilter_SingleMul_Type:
+        return SkLightingColorFilter_SingleMul::IsA;
+    case SkFlattenable::kSkModeColorFilter_Type:
+        return SkModeColorFilter::IsA;
+    case SkFlattenable::kSrc_SkModeColorFilter_Type:
+        return Src_SkModeColorFilter::IsA;
+    case SkFlattenable::kSrcOver_SkModeColorFilter_Type:
+        return SrcOver_SkModeColorFilter::IsA;
+    default:
+        break;
+    }
+    return NULL;
+}
+
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkColorFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkModeColorFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(Src_SkModeColorFilter)