Expand pixelref to return SkImageInfo and rowbytes

src/core/SkBitmap.cpp

Index: src/core/SkBitmap.cpp
diff --git a/src/core/SkBitmap.cpp b/src/core/SkBitmap.cpp
index 2fae75ae3841dd39d53c305ee83f70b8ae806fe5..626499ad40e2bd86e2c2bf6cc4541763f0233448 100644
--- a/src/core/SkBitmap.cpp
+++ b/src/core/SkBitmap.cpp
@@ -368,6 +368,37 @@ void SkBitmap::updatePixelsFromRef() const {
     }
 }
 
+bool SkBitmap::asImageInfo(SkImageInfo* info) const {
+    SkColorType ct;
+    switch (this->config()) {
+        case kNo_Config:
+        case kA1_Config:
+            return false;
+        case kA8_Config:
+            ct = kAlpha_8_SkColorType;
+            break;
+        case kIndex8_Config:
+            ct = kIndex8_SkColorType;
+            break;
+        case kRGB_565_Config:
+            ct = kRGB_565_SkColorType;
+            break;
+        case kARGB_4444_Config:
+            ct = kARGB_4444_SkColorType;
+            break;
+        case kARGB_8888_Config:
+            ct = kPMColor_SkColorType;
+            break;
+    }
+    if (info) {
+        info->fWidth = fWidth;
+        info->fHeight = fHeight;
+        info->fAlphaType = this->alphaType();
+        info->fColorType = ct;
+    }
+    return true;
+}
+
 SkPixelRef* SkBitmap::setPixelRef(SkPixelRef* pr, size_t offset) {
     // do this first, we that we never have a non-zero offset with a null ref
     if (NULL == pr) {
@@ -421,7 +452,12 @@ void SkBitmap::setPixels(void* p, SkColorTable* ctable) {
     Sk64 size = this->getSize64();
     SkASSERT(!size.isNeg() && size.is32());
 
-    this->setPixelRef(new SkMallocPixelRef(p, size.get32(), ctable, false))->unref();
+    SkImageInfo info;
+    if (!this->asImageInfo(&info)) {
+        this->setPixelRef(NULL, 0);
+        return;
+    }
+    this->setPixelRef(new SkMallocPixelRef(info, p, fRowBytes, ctable, false))->unref();

[scroggo, 2013/11/19 18:17:09]

SkNEW_ARGS

[reed1, 2013/11/20 20:56:56]

Done.

     // since we're already allocated, we lockPixels right away
     this->lockPixels();
     SkDEBUGCODE(this->validate();)
@@ -491,12 +527,20 @@ bool SkBitmap::HeapAllocator::allocPixelRef(SkBitmap* dst,
         return false;
     }
 
+    SkImageInfo info;
+    if (!dst->asImageInfo(&info)) {
+        SkDebugf("unsupported config for info %d\n", dst->config());
+        return false;
+    }
+    
     void* addr = sk_malloc_flags(size.get32(), 0);  // returns NULL on failure
     if (NULL == addr) {
         return false;
     }
 
-    dst->setPixelRef(new SkMallocPixelRef(addr, size.get32(), ctable))->unref();
+    SkPixelRef* pr = SkNEW_ARGS(SkMallocPixelRef,
+                                (info, addr, dst->rowBytes(), ctable, true));
+    dst->setPixelRef(pr, 0)->unref();
     // since we're already allocated, we lockPixels right away
     dst->lockPixels();
     return true;