From 1987366b3c0a9dd9280620e62e0edb7d5087a828 Mon Sep 17 00:00:00 2001
From: Matt Sarett <msarett@google.com>
Date: Wed, 5 Apr 2017 13:36:08 -0400
Subject: [PATCH] Delete SkPixelRef::readPixels()

Nobody calls this or overrides this.

Bug: skia:
Change-Id: I6235e4c7bcdc45523ce7f63842635c79e00d2dc4
Reviewed-on: https://skia-review.googlesource.com/11357
Commit-Queue: Matt Sarett <msarett@google.com>
Reviewed-by: Mike Reed <reed@google.com>
---
 include/core/SkPixelRef.h | 11 -----------
 src/core/SkBitmap.cpp     | 35 +----------------------------------
 src/core/SkPixelRef.cpp   |  7 -------
 3 files changed, 1 insertion(+), 52 deletions(-)

diff --git a/include/core/SkPixelRef.h b/include/core/SkPixelRef.h
index e099668083..92b50b870d 100644
--- a/include/core/SkPixelRef.h
+++ b/include/core/SkPixelRef.h
@@ -192,9 +192,6 @@ public:
 
     bool requestLock(const LockRequest&, LockResult*);
 
-    /** Populates dst with the pixels of this pixelRef, converting them to colorType. */
-    bool readPixels(SkBitmap* dst, SkColorType colorType, const SkIRect* subset = NULL);
-
     // Register a listener that may be called the next time our generation ID changes.
     //
     // We'll only call the listener if we're confident that we are the only SkPixelRef with this
@@ -247,14 +244,6 @@ protected:
     /** Default impl returns true */
     virtual bool onLockPixelsAreWritable() const;
 
-    /**
-     *  For pixelrefs that don't have access to their raw pixels, they may be
-     *  able to make a copy of them (e.g. if the pixels are on the GPU).
-     *
-     *  The base class implementation returns false;
-     */
-    virtual bool onReadPixels(SkBitmap* dst, SkColorType colorType, const SkIRect* subsetOrNull);
-
     // default impl does nothing.
     virtual void onNotifyPixelsChanged();
 
diff --git a/src/core/SkBitmap.cpp b/src/core/SkBitmap.cpp
index df3b24ed11..151650540b 100644
--- a/src/core/SkBitmap.cpp
+++ b/src/core/SkBitmap.cpp
@@ -730,41 +730,8 @@ bool SkBitmap::copyTo(SkBitmap* dst, SkColorType dstColorType, Allocator* alloc)
         return false;
     }
 
-    // if we have a texture, first get those pixels
-    SkBitmap tmpSrc;
-    const SkBitmap* src = this;
-
-    if (fPixelRef) {
-        SkIRect subset;
-        subset.setXYWH(fPixelRefOrigin.fX, fPixelRefOrigin.fY,
-                       fInfo.width(), fInfo.height());
-        if (fPixelRef->readPixels(&tmpSrc, dstColorType, &subset)) {
-            if (fPixelRef->info().alphaType() == kUnpremul_SkAlphaType) {
-                // FIXME: The only meaningful implementation of readPixels
-                // (GrPixelRef) assumes premultiplied pixels.
-                return false;
-            }
-            SkASSERT(tmpSrc.width() == this->width());
-            SkASSERT(tmpSrc.height() == this->height());
-
-            // did we get lucky and we can just return tmpSrc?
-            if (tmpSrc.colorType() == dstColorType && nullptr == alloc) {
-                dst->swap(tmpSrc);
-                // If the result is an exact copy, clone the gen ID.
-                SkPixelRef* dstPixelRef = dst->pixelRef();
-                if (!dstPixelRef && dstPixelRef->info() == fPixelRef->info()) {
-                    dstPixelRef->cloneGenID(*fPixelRef);
-                }
-                return true;
-            }
-
-            // fall through to the raster case
-            src = &tmpSrc;
-        }
-    }
-
     SkAutoPixmapUnlock srcUnlocker;
-    if (!src->requestLock(&srcUnlocker)) {
+    if (!this->requestLock(&srcUnlocker)) {
         return false;
     }
     SkPixmap srcPM = srcUnlocker.pixmap();
diff --git a/src/core/SkPixelRef.cpp b/src/core/SkPixelRef.cpp
index 18cb4d2cb6..5e459d3db3 100644
--- a/src/core/SkPixelRef.cpp
+++ b/src/core/SkPixelRef.cpp
@@ -307,15 +307,8 @@ void SkPixelRef::restoreMutability() {
     fMutability = kMutable;
 }
 
-bool SkPixelRef::readPixels(SkBitmap* dst, SkColorType ct, const SkIRect* subset) {
-    return this->onReadPixels(dst, ct, subset);
-}
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
-bool SkPixelRef::onReadPixels(SkBitmap* dst, SkColorType, const SkIRect* subset) {
-    return false;
-}
 
 void SkPixelRef::onNotifyPixelsChanged() { }