Revert of eliminate config param -- it was always self's config (https://codereview.chromium.org/246513002/)

Reason for revert:
Causes some layout_test failures around texture backed bitmaps. Test names and crash logs accessible via: https://storage.googleapis.com/chromium-layout-test-archives/linux_layout/13845/layout-test-results/results.html



Original issue's description:
> eliminate config param -- it was always self's config
>
> BUG=skia:
> R=bsalomon@google.com
>
> Committed: https://code.google.com/p/skia/source/detail?r=14303

R=reed@google.com
TBR=reed@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/249373003

git-svn-id: http://skia.googlecode.com/svn/trunk@14324 2bbb7eff-a529-9590-31e7-b0007b416f81

include/core/SkPixelRef.h

@@ -223,13 +223,14 @@ public:
 
     /**
      *  Makes a deep copy of this PixelRef, respecting the requested config.
+     *  @param config Desired config.
      *  @param subset Subset of this PixelRef to copy. Must be fully contained within the bounds of
      *         of this PixelRef.
      *  @return A new SkPixelRef, or NULL if either there is an error (e.g. the destination could
      *          not be created with the given config), or this PixelRef does not support deep
      *          copies.
      */
-    virtual SkPixelRef* deepCopy(const SkIRect* subset = NULL) {
+    virtual SkPixelRef* deepCopy(SkBitmap::Config config, const SkIRect* subset = NULL) {
         return NULL;
     }
 

include/gpu/SkGrPixelRef.h

@@ -56,7 +56,7 @@ public:
 protected:
     // overrides from SkPixelRef
     virtual bool onReadPixels(SkBitmap* dst, const SkIRect* subset) SK_OVERRIDE;
-    virtual SkPixelRef* deepCopy(const SkIRect* subset) SK_OVERRIDE;
+    virtual SkPixelRef* deepCopy(SkBitmap::Config dstConfig, const SkIRect* subset) SK_OVERRIDE;
 
 private:
     GrSurface*  fSurface;

src/core/SkBitmap.cpp

@@ -946,7 +946,7 @@ bool SkBitmap::extractSubset(SkBitmap* result, const SkIRect& subset) const {
 
     if (fPixelRef->getTexture() != NULL) {
         // Do a deep copy
-        SkPixelRef* pixelRef = fPixelRef->deepCopy(&subset);
+        SkPixelRef* pixelRef = fPixelRef->deepCopy(this->config(), &subset);
         if (pixelRef != NULL) {
             SkBitmap dst;
             dst.setConfig(this->config(), subset.width(), subset.height(), 0,
@@ -1146,7 +1146,8 @@ bool SkBitmap::copyTo(SkBitmap* dst, SkColorType dstColorType,
 }
 
 bool SkBitmap::deepCopyTo(SkBitmap* dst) const {
-    const SkColorType dstCT = this->colorType();
+    const SkBitmap::Config dstConfig = this->config();
+    const SkColorType dstCT = SkBitmapConfigToColorType(dstConfig);
 
     if (!this->canCopyTo(dstCT)) {
         return false;
@@ -1155,15 +1156,24 @@ bool SkBitmap::deepCopyTo(SkBitmap* dst) const {
     // If we have a PixelRef, and it supports deep copy, use it.
     // Currently supported only by texture-backed bitmaps.
     if (fPixelRef) {
-        SkPixelRef* pixelRef = fPixelRef->deepCopy();
+        SkPixelRef* pixelRef = fPixelRef->deepCopy(dstConfig);
         if (pixelRef) {
-            // Since there is no subset to pass to deepCopy, and deepCopy
+            uint32_t rowBytes;
-            // succeeded, the new pixel ref must be identical.
+            if (this->colorType() == dstCT) {
-            SkASSERT(fPixelRef->info() == pixelRef->info());
+                // Since there is no subset to pass to deepCopy, and deepCopy
-            pixelRef->cloneGenID(*fPixelRef);
+                // succeeded, the new pixel ref must be identical.
+                SkASSERT(fPixelRef->info() == pixelRef->info());
+                pixelRef->cloneGenID(*fPixelRef);
+                // Use the same rowBytes as the original.
+                rowBytes = fRowBytes;
+            } else {
+                // With the new config, an appropriate fRowBytes will be computed by setConfig.
+                rowBytes = 0;
+            }
 
             SkImageInfo info = fInfo;
-            if (!dst->setConfig(info, fRowBytes)) {
+            info.fColorType = dstCT;
+            if (!dst->setConfig(info, rowBytes)) {
                 return false;
             }
             dst->setPixelRef(pixelRef, fPixelRefOrigin)->unref();

src/gpu/SkGrPixelRef.cpp

@@ -51,7 +51,8 @@ bool SkROLockPixelsPixelRef::onLockPixelsAreWritable() const {
 
 ///////////////////////////////////////////////////////////////////////////////
 
-static SkGrPixelRef* copyToTexturePixelRef(GrTexture* texture, const SkIRect* subset) {
+static SkGrPixelRef* copyToTexturePixelRef(GrTexture* texture, SkBitmap::Config dstConfig,
+                                           const SkIRect* subset) {
     if (NULL == texture) {
         return NULL;
     }
@@ -76,7 +77,7 @@ static SkGrPixelRef* copyToTexturePixelRef(GrTexture* texture, const SkIRect* su
         topLeft = NULL;
     }
     desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
-    desc.fConfig = texture->config();
+    desc.fConfig = SkBitmapConfig2GrPixelConfig(dstConfig);
 
     SkImageInfo info;
     if (!GrPixelConfig2ColorType(desc.fConfig, &info.fColorType)) {
@@ -151,7 +152,7 @@ GrTexture* SkGrPixelRef::getTexture() {
     return NULL;
 }
 
-SkPixelRef* SkGrPixelRef::deepCopy(const SkIRect* subset) {
+SkPixelRef* SkGrPixelRef::deepCopy(SkBitmap::Config dstConfig, const SkIRect* subset) {
     if (NULL == fSurface) {
         return NULL;
     }
@@ -162,7 +163,7 @@ SkPixelRef* SkGrPixelRef::deepCopy(const SkIRect* subset) {
     // a GrTexture owned elsewhere (e.g., SkGpuDevice), and cannot live
     // independently of that texture.  Texture-backed pixel refs, on the other
     // hand, own their GrTextures, and are thus self-contained.
-    return copyToTexturePixelRef(fSurface->asTexture(), subset);
+    return copyToTexturePixelRef(fSurface->asTexture(), dstConfig, subset);
 }
 
 bool SkGrPixelRef::onReadPixels(SkBitmap* dst, const SkIRect* subset) {