add installPixels

src/core/SkBitmap.cpp

Index: src/core/SkBitmap.cpp
diff --git a/src/core/SkBitmap.cpp b/src/core/SkBitmap.cpp
index 2464d5d5967409f77d87ce7cbf26cc5e4b82ab4d..75845b15d610babe5f5f665cbe1df58dcd030aeb 100644
--- a/src/core/SkBitmap.cpp
+++ b/src/core/SkBitmap.cpp
@@ -495,6 +495,33 @@ bool SkBitmap::allocPixels(Allocator* allocator, SkColorTable* ctable) {
     return allocator->allocPixelRef(this, ctable);
 }
 
+bool SkBitmap::allocPixels(const SkImageInfo& info, SkColorTable* ctable) {
+    if (!this->setConfig(info) && !this->allocPixels(ctable)) {
+        this->reset();
+        return false;
+    }
+    return true;
+}
+
+bool SkBitmap::installPixels(const SkImageInfo& info, void* pixels, size_t rb,
+                             void (*releaseProc)(void* addr, void* context),
+                             void* context) {
+    if (!this->setConfig(info)) {
+        this->reset();
+        return false;
+    }
+
+    SkPixelRef* pr = SkMallocPixelRef::NewWithProc(info, rb, NULL, pixels,
+                                                   releaseProc, context);
+    if (!pr) {
+        this->reset();
+        return false;
+    }
+
+    this->setPixelRef(pr)->unref();
+    return true;
+}
+
 void SkBitmap::freePixels() {
     // if we're gonna free the pixels, we certainly need to free the mipmap
     this->freeMipMap();