diff --git a/include/gpu/GrSurface.h b/include/gpu/GrSurface.h
index bcd854f..3211a1e 100644
--- a/include/gpu/GrSurface.h
+++ b/include/gpu/GrSurface.h
@@ -65,6 +65,12 @@
     static size_t ComputeSize(GrPixelConfig config, int width, int height, int colorSamplesPerPixel,
                               GrMipMapped, bool useNextPow2 = false);
 
+    /**
+     * The pixel values of this surface cannot be modified (e.g. doesn't support write pixels or
+     * MIP map level regen).
+     */
+    bool readOnly() const { return fSurfaceFlags & GrInternalSurfaceFlags::kReadOnly; }
+
 protected:
     void setHasMixedSamples() {
         SkASSERT(this->asRenderTarget());
@@ -88,6 +94,11 @@
         return fSurfaceFlags & GrInternalSurfaceFlags::kGLRTFBOIDIs0;
     }
 
+    void setReadOnly() {
+        SkASSERT(!this->asRenderTarget());
+        fSurfaceFlags |= GrInternalSurfaceFlags::kReadOnly;
+    }
+
     // Methods made available via GrSurfacePriv
     bool hasPendingRead() const;
     bool hasPendingWrite() const;
diff --git a/include/private/GrSurfaceProxy.h b/include/private/GrSurfaceProxy.h
index 887400a..df8505e 100644
--- a/include/private/GrSurfaceProxy.h
+++ b/include/private/GrSurfaceProxy.h
@@ -365,6 +365,12 @@
      */
     SkBudgeted isBudgeted() const { return fBudgeted; }
 
+    /**
+     * The pixel values of this proxy's surface cannot be modified (e.g. doesn't support write
+     * pixels or MIP map level regen),
+     */
+    bool readOnly() const { return fSurfaceFlags & GrInternalSurfaceFlags::kReadOnly; }
+
     void setLastOpList(GrOpList* opList);
     GrOpList* getLastOpList() { return fLastOpList; }
 
@@ -432,7 +438,7 @@
                    const GrBackendFormat& format, const GrSurfaceDesc&, GrSurfaceOrigin,
                    SkBackingFit, SkBudgeted, GrInternalSurfaceFlags);
 
-    // Wrapped version
+    // Wrapped version.
     GrSurfaceProxy(sk_sp<GrSurface>, GrSurfaceOrigin, SkBackingFit);
 
     virtual ~GrSurfaceProxy();
diff --git a/include/private/GrTypesPriv.h b/include/private/GrTypesPriv.h
index e9fd0a3..c14e337 100644
--- a/include/private/GrTypesPriv.h
+++ b/include/private/GrTypesPriv.h
@@ -825,11 +825,19 @@
     kNone                           = 0,
 
     // Surface-level
+
     kNoPendingIO                    = 1 << 0,
 
     kSurfaceMask                    = kNoPendingIO,
 
-    // RT-only
+    // Texture-level
+
+    // Means the pixels in the texture are read-only. Cannot also be a GrRenderTarget[Proxy].
+    kReadOnly                       = 1 << 1,
+
+    kTextureMask                    = kReadOnly,
+
+    // RT-level
 
     // For internal resources:
     //    this is enabled whenever MSAA is enabled and GrCaps reports mixed samples are supported
diff --git a/src/gpu/GrAHardwareBufferImageGenerator.cpp b/src/gpu/GrAHardwareBufferImageGenerator.cpp
index b6cc28d..8b86721 100644
--- a/src/gpu/GrAHardwareBufferImageGenerator.cpp
+++ b/src/gpu/GrAHardwareBufferImageGenerator.cpp
@@ -574,8 +574,8 @@
     const bool isProtectedContent = fIsProtectedContent;
 
     sk_sp<GrTextureProxy> texProxy = proxyProvider->createLazyProxy(
-            [context, hardwareBuffer, width, height, pixelConfig, isProtectedContent, backendFormat]
-            (GrResourceProvider* resourceProvider) {
+            [context, hardwareBuffer, width, height, pixelConfig, isProtectedContent,
+             backendFormat](GrResourceProvider* resourceProvider) {
                 if (!resourceProvider) {
                     AHardwareBuffer_release(hardwareBuffer);
                     return sk_sp<GrTexture>();
@@ -596,7 +596,8 @@
                 SkASSERT(deleteImageProc && deleteImageCtx);
 
                 backendTex.fConfig = pixelConfig;
-                sk_sp<GrTexture> tex = resourceProvider->wrapBackendTexture(backendTex);
+                sk_sp<GrTexture> tex = resourceProvider->wrapBackendTexture(
+                        backendTex, kBorrow_GrWrapOwnership, kRead_GrIOType);
                 if (!tex) {
                     deleteImageProc(deleteImageCtx);
                     return sk_sp<GrTexture>();
@@ -610,8 +611,8 @@
 
                 return tex;
             },
-            backendFormat, desc, fSurfaceOrigin, GrMipMapped::kNo, SkBackingFit::kExact,
-            SkBudgeted::kNo);
+            backendFormat, desc, fSurfaceOrigin, GrMipMapped::kNo,
+            GrInternalSurfaceFlags::kReadOnly, SkBackingFit::kExact, SkBudgeted::kNo);
 
     if (!texProxy) {
         AHardwareBuffer_release(hardwareBuffer);
diff --git a/src/gpu/GrBackendTextureImageGenerator.cpp b/src/gpu/GrBackendTextureImageGenerator.cpp
index 4f887f2..1785823 100644
--- a/src/gpu/GrBackendTextureImageGenerator.cpp
+++ b/src/gpu/GrBackendTextureImageGenerator.cpp
@@ -138,8 +138,8 @@
     SkASSERT(format.isValid());
 
     sk_sp<GrTextureProxy> proxy = proxyProvider->createLazyProxy(
-            [refHelper, releaseProcHelper, semaphore, backendTexture]
-            (GrResourceProvider* resourceProvider) {
+            [refHelper, releaseProcHelper, semaphore,
+             backendTexture](GrResourceProvider* resourceProvider) {
                 if (!resourceProvider) {
                     return sk_sp<GrTexture>();
                 }
@@ -163,9 +163,8 @@
                     // informs us that the context is done with it. This is unfortunate - we'll have
                     // two texture objects referencing the same GPU object. However, no client can
                     // ever see the original texture, so this should be safe.
-                    tex = resourceProvider->wrapBackendTexture(backendTexture,
-                                                               kBorrow_GrWrapOwnership,
-                                                               true);
+                    tex = resourceProvider->wrapBackendTexture(
+                            backendTexture, kBorrow_GrWrapOwnership, kRead_GrIOType, true);
                     if (!tex) {
                         return sk_sp<GrTexture>();
                     }
@@ -176,7 +175,8 @@
 
                 return tex;
             },
-            format, desc, fSurfaceOrigin, mipMapped, SkBackingFit::kExact, SkBudgeted::kNo);
+            format, desc, fSurfaceOrigin, mipMapped, GrInternalSurfaceFlags::kReadOnly,
+            SkBackingFit::kExact, SkBudgeted::kNo);
 
     if (!proxy) {
         return nullptr;
diff --git a/src/gpu/GrCaps.cpp b/src/gpu/GrCaps.cpp
index 64625d9..562a7fc 100644
--- a/src/gpu/GrCaps.cpp
+++ b/src/gpu/GrCaps.cpp
@@ -6,9 +6,10 @@
  */
 
 #include "GrCaps.h"
-
 #include "GrBackendSurface.h"
 #include "GrContextOptions.h"
+#include "GrSurface.h"
+#include "GrSurfaceProxy.h"
 #include "GrTypesPriv.h"
 #include "GrWindowRectangles.h"
 #include "SkJSONWriter.h"
@@ -242,6 +243,15 @@
 void GrCaps::dumpJSON(SkJSONWriter* writer) const { }
 #endif
 
+bool GrCaps::surfaceSupportsWritePixels(const GrSurface* surface) const {
+    return surface->readOnly() ? false : this->onSurfaceSupportsWritePixels(surface);
+}
+
+bool GrCaps::canCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
+                            const SkIRect& srcRect, const SkIPoint& dstPoint) const {
+    return dst->readOnly() ? false : this->onCanCopySurface(dst, src, srcRect, dstPoint);
+}
+
 bool GrCaps::validateSurfaceDesc(const GrSurfaceDesc& desc, GrMipMapped mipped) const {
     if (!this->isConfigTexturable(desc.fConfig)) {
         return false;
diff --git a/src/gpu/GrCaps.h b/src/gpu/GrCaps.h
index c695ebe..7a9285d 100644
--- a/src/gpu/GrCaps.h
+++ b/src/gpu/GrCaps.h
@@ -192,7 +192,7 @@
      * If this returns false then the caller should implement a fallback where a temporary texture
      * is created, pixels are written to it, and then that is copied or drawn into the the surface.
      */
-    virtual bool surfaceSupportsWritePixels(const GrSurface*) const = 0;
+    bool surfaceSupportsWritePixels(const GrSurface*) const;
 
     /**
      * Backends may have restrictions on what types of surfaces support GrGpu::readPixels().
@@ -246,8 +246,8 @@
     /**
      * Returns whether or not we will be able to do a copy given the passed in params
      */
-    virtual bool canCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
-                                const SkIRect& srcRect, const SkIPoint& dstPoint) const = 0;
+    bool canCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
+                        const SkIRect& srcRect, const SkIPoint& dstPoint) const;
 
     bool dynamicStateArrayGeometryProcessorTextureSupport() const {
         return fDynamicStateArrayGeometryProcessorTextureSupport;
@@ -389,6 +389,9 @@
 private:
     virtual void onApplyOptionsOverrides(const GrContextOptions&) {}
     virtual void onDumpJSON(SkJSONWriter*) const {}
+    virtual bool onSurfaceSupportsWritePixels(const GrSurface*) const = 0;
+    virtual bool onCanCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
+                                  const SkIRect& srcRect, const SkIPoint& dstPoint) const = 0;
 
     // Backends should implement this if they have any extra requirements for use of window
     // rectangles for a specific GrBackendRenderTarget outside of basic support.
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 06eb6c4..1b2d13c 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -928,7 +928,8 @@
                                                                  sk_sp<SkColorSpace> colorSpace) {
     ASSERT_SINGLE_OWNER_PRIV
 
-    sk_sp<GrSurfaceProxy> proxy = this->proxyProvider()->wrapBackendTexture(tex, origin);
+    sk_sp<GrSurfaceProxy> proxy = this->proxyProvider()->wrapBackendTexture(
+            tex, origin, kBorrow_GrWrapOwnership, kRW_GrIOType);
     if (!proxy) {
         return nullptr;
     }
diff --git a/src/gpu/GrGpu.cpp b/src/gpu/GrGpu.cpp
index 8e18fb8..7b7ff2e 100644
--- a/src/gpu/GrGpu.cpp
+++ b/src/gpu/GrGpu.cpp
@@ -145,7 +145,9 @@
 
 sk_sp<GrTexture> GrGpu::wrapBackendTexture(const GrBackendTexture& backendTex,
                                            GrWrapOwnership ownership,
+                                           GrIOType ioType,
                                            bool purgeImmediately) {
+    SkASSERT(ioType != kWrite_GrIOType);
     this->handleDirtyContext();
     if (!this->caps()->isConfigTexturable(backendTex.config())) {
         return nullptr;
@@ -154,7 +156,7 @@
         backendTex.height() > this->caps()->maxTextureSize()) {
         return nullptr;
     }
-    return this->onWrapBackendTexture(backendTex, ownership, purgeImmediately);
+    return this->onWrapBackendTexture(backendTex, ownership, ioType, purgeImmediately);
 }
 
 sk_sp<GrTexture> GrGpu::wrapRenderableBackendTexture(const GrBackendTexture& backendTex,
@@ -214,7 +216,13 @@
                         bool canDiscardOutsideDstRect) {
     GR_CREATE_TRACE_MARKER_CONTEXT("GrGpu", "copySurface", fContext);
     SkASSERT(dst && src);
+
+    if (dst->readOnly()) {
+        return false;
+    }
+
     this->handleDirtyContext();
+
     return this->onCopySurface(dst, dstOrigin, src, srcOrigin, srcRect, dstPoint,
                                canDiscardOutsideDstRect);
 }
@@ -239,6 +247,11 @@
 bool GrGpu::writePixels(GrSurface* surface, int left, int top, int width, int height,
                         GrColorType srcColorType, const GrMipLevel texels[], int mipLevelCount) {
     SkASSERT(surface);
+
+    if (surface->readOnly()) {
+        return false;
+    }
+
     if (1 == mipLevelCount) {
         // We require that if we are not mipped, then the write region is contained in the surface
         SkIRect subRect = SkIRect::MakeXYWH(left, top, width, height);
@@ -271,8 +284,13 @@
 bool GrGpu::transferPixels(GrTexture* texture, int left, int top, int width, int height,
                            GrColorType bufferColorType, GrBuffer* transferBuffer, size_t offset,
                            size_t rowBytes) {
+    SkASSERT(texture);
     SkASSERT(transferBuffer);
 
+    if (texture->readOnly()) {
+        return false;
+    }
+
     // We require that the write region is contained in the texture
     SkIRect subRect = SkIRect::MakeXYWH(left, top, width, height);
     SkIRect bounds = SkIRect::MakeWH(texture->width(), texture->height());
@@ -298,6 +316,9 @@
     SkASSERT(texture->texturePriv().mipMapped() == GrMipMapped::kYes);
     SkASSERT(texture->texturePriv().mipMapsAreDirty());
     SkASSERT(!texture->asRenderTarget() || !texture->asRenderTarget()->needsResolve());
+    if (texture->readOnly()) {
+        return false;
+    }
     if (this->onRegenerateMipMapLevels(texture)) {
         texture->texturePriv().markMipMapsClean();
         return true;
@@ -314,6 +335,7 @@
 void GrGpu::didWriteToSurface(GrSurface* surface, GrSurfaceOrigin origin, const SkIRect* bounds,
                               uint32_t mipLevels) const {
     SkASSERT(surface);
+    SkASSERT(!surface->readOnly());
     // Mark any MIP chain and resolve buffer as dirty if and only if there is a non-empty bounds.
     if (nullptr == bounds || !bounds->isEmpty()) {
         if (GrRenderTarget* target = surface->asRenderTarget()) {
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index cb8b2e9..99985f1 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -104,7 +104,7 @@
     /**
      * Implements GrResourceProvider::wrapBackendTexture
      */
-    sk_sp<GrTexture> wrapBackendTexture(const GrBackendTexture&, GrWrapOwnership,
+    sk_sp<GrTexture> wrapBackendTexture(const GrBackendTexture&, GrWrapOwnership, GrIOType,
                                         bool purgeImmediately);
 
     /**
@@ -445,7 +445,7 @@
                                              const GrMipLevel texels[], int mipLevelCount) = 0;
 
     virtual sk_sp<GrTexture> onWrapBackendTexture(const GrBackendTexture&, GrWrapOwnership,
-                                                  bool purgeImmediately) = 0;
+                                                  GrIOType, bool purgeImmediately) = 0;
     virtual sk_sp<GrTexture> onWrapRenderableBackendTexture(const GrBackendTexture&,
                                                             int sampleCnt,
                                                             GrWrapOwnership) = 0;
diff --git a/src/gpu/GrProxyProvider.cpp b/src/gpu/GrProxyProvider.cpp
index 3259f28..dcf642b 100644
--- a/src/gpu/GrProxyProvider.cpp
+++ b/src/gpu/GrProxyProvider.cpp
@@ -415,8 +415,10 @@
 sk_sp<GrTextureProxy> GrProxyProvider::wrapBackendTexture(const GrBackendTexture& backendTex,
                                                           GrSurfaceOrigin origin,
                                                           GrWrapOwnership ownership,
+                                                          GrIOType ioType,
                                                           ReleaseProc releaseProc,
                                                           ReleaseContext releaseCtx) {
+    SkASSERT(ioType != kWrite_GrIOType);
     if (this->isAbandoned()) {
         return nullptr;
     }
@@ -426,7 +428,7 @@
         return nullptr;
     }
 
-    sk_sp<GrTexture> tex = fResourceProvider->wrapBackendTexture(backendTex, ownership);
+    sk_sp<GrTexture> tex = fResourceProvider->wrapBackendTexture(backendTex, ownership, ioType);
     if (!tex) {
         return nullptr;
     }
diff --git a/src/gpu/GrProxyProvider.h b/src/gpu/GrProxyProvider.h
index 1e26f51..1aec328 100644
--- a/src/gpu/GrProxyProvider.h
+++ b/src/gpu/GrProxyProvider.h
@@ -104,11 +104,12 @@
     typedef void (*ReleaseProc)(ReleaseContext);
 
     /*
-     * Create a texture proxy that wraps a (non-renderable) backend texture.
+     * Create a texture proxy that wraps a (non-renderable) backend texture. GrIOType must be
+     * kRead or kRW.
      */
     sk_sp<GrTextureProxy> wrapBackendTexture(const GrBackendTexture&, GrSurfaceOrigin,
-                                             GrWrapOwnership = kBorrow_GrWrapOwnership,
-                                             ReleaseProc = nullptr, ReleaseContext = nullptr);
+                                             GrWrapOwnership, GrIOType, ReleaseProc = nullptr,
+                                             ReleaseContext = nullptr);
 
     /*
      * Create a texture proxy that wraps a backend texture and is both texture-able and renderable
@@ -119,7 +120,7 @@
                                                        GrWrapOwnership = kBorrow_GrWrapOwnership);
 
     /*
-     * Create a render target proxy that wraps a backend rendertarget
+     * Create a render target proxy that wraps a backend render target
      */
     sk_sp<GrSurfaceProxy> wrapBackendRenderTarget(const GrBackendRenderTarget&, GrSurfaceOrigin);
 
diff --git a/src/gpu/GrResourceProvider.cpp b/src/gpu/GrResourceProvider.cpp
index 78bd97b..1193246 100644
--- a/src/gpu/GrResourceProvider.cpp
+++ b/src/gpu/GrResourceProvider.cpp
@@ -226,12 +226,13 @@
 
 sk_sp<GrTexture> GrResourceProvider::wrapBackendTexture(const GrBackendTexture& tex,
                                                         GrWrapOwnership ownership,
+                                                        GrIOType ioType,
                                                         bool purgeImmediately) {
     ASSERT_SINGLE_OWNER
     if (this->isAbandoned()) {
         return nullptr;
     }
-    return fGpu->wrapBackendTexture(tex, ownership, purgeImmediately);
+    return fGpu->wrapBackendTexture(tex, ownership, ioType, purgeImmediately);
 }
 
 sk_sp<GrTexture> GrResourceProvider::wrapRenderableBackendTexture(const GrBackendTexture& tex,
diff --git a/src/gpu/GrResourceProvider.h b/src/gpu/GrResourceProvider.h
index 74e1dce..c86136f 100644
--- a/src/gpu/GrResourceProvider.h
+++ b/src/gpu/GrResourceProvider.h
@@ -98,13 +98,17 @@
     /**
      * Wraps an existing texture with a GrTexture object.
      *
+     * GrIOType must either be kRead or kRW. kRead blocks any operations that would modify the
+     * pixels (e.g. dst for a copy, regenerating MIP levels, write pixels).
+     *
      * OpenGL: if the object is a texture Gr may change its GL texture params
      *         when it is drawn.
      *
      * @return GrTexture object or NULL on failure.
      */
     sk_sp<GrTexture> wrapBackendTexture(const GrBackendTexture& tex,
-                                        GrWrapOwnership = kBorrow_GrWrapOwnership,
+                                        GrWrapOwnership /* = kBorrow_GrWrapOwnership*/,
+                                        GrIOType,
                                         bool purgeImmediately = false);
 
     /**
diff --git a/src/gpu/GrTextureOpList.cpp b/src/gpu/GrTextureOpList.cpp
index 4b93803..ae51807 100644
--- a/src/gpu/GrTextureOpList.cpp
+++ b/src/gpu/GrTextureOpList.cpp
@@ -25,6 +25,7 @@
                                  GrAuditTrail* auditTrail)
         : INHERITED(resourceProvider, std::move(opMemoryPool), proxy, auditTrail) {
     SkASSERT(fOpMemoryPool);
+    SkASSERT(!proxy->readOnly());
 }
 
 void GrTextureOpList::deleteOp(int index) {
diff --git a/src/gpu/GrTextureProxy.cpp b/src/gpu/GrTextureProxy.cpp
index 854ed17..b732818 100644
--- a/src/gpu/GrTextureProxy.cpp
+++ b/src/gpu/GrTextureProxy.cpp
@@ -173,7 +173,14 @@
     SkASSERT(surface->asTexture());
     SkASSERT(GrMipMapped::kNo == this->proxyMipMapped() ||
              GrMipMapped::kYes == surface->asTexture()->texturePriv().mipMapped());
+
     SkASSERT(surface->asTexture()->texturePriv().textureType() == this->textureType());
+
+    GrInternalSurfaceFlags proxyFlags = fSurfaceFlags;
+    GrInternalSurfaceFlags surfaceFlags = surface->surfacePriv().flags();
+    SkASSERT((proxyFlags & GrInternalSurfaceFlags::kTextureMask) ==
+             (surfaceFlags & GrInternalSurfaceFlags::kTextureMask));
 }
+
 #endif
 
diff --git a/src/gpu/GrTextureRenderTargetProxy.cpp b/src/gpu/GrTextureRenderTargetProxy.cpp
index a665270..3e52b2c 100644
--- a/src/gpu/GrTextureRenderTargetProxy.cpp
+++ b/src/gpu/GrTextureRenderTargetProxy.cpp
@@ -124,11 +124,19 @@
     SkASSERT(surface->asRenderTarget());
     SkASSERT(surface->asRenderTarget()->numStencilSamples() == this->numStencilSamples());
 
+    SkASSERT(surface->asTexture()->texturePriv().textureType() == this->textureType());
+
     GrInternalSurfaceFlags proxyFlags = fSurfaceFlags;
     GrInternalSurfaceFlags surfaceFlags = surface->surfacePriv().flags();
+
+    // Only non-RT textures can be read only.
+    SkASSERT(!(proxyFlags & GrInternalSurfaceFlags::kReadOnly));
+    SkASSERT(!(surfaceFlags & GrInternalSurfaceFlags::kReadOnly));
+
     SkASSERT((proxyFlags & GrInternalSurfaceFlags::kRenderTargetMask) ==
              (surfaceFlags & GrInternalSurfaceFlags::kRenderTargetMask));
-    SkASSERT(surface->asTexture()->texturePriv().textureType() == this->textureType());
+    SkASSERT((proxyFlags & GrInternalSurfaceFlags::kTextureMask) ==
+             (surfaceFlags & GrInternalSurfaceFlags::kTextureMask));
 }
 #endif
 
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index 9f26a7c..f90a1b0 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -2172,8 +2172,8 @@
            !rt->rtPriv().glRTFBOIDIs0();
 }
 
-bool GrGLCaps::canCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
-                              const SkIRect& srcRect, const SkIPoint& dstPoint) const {
+bool GrGLCaps::onCanCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
+                                const SkIRect& srcRect, const SkIPoint& dstPoint) const {
     GrSurfaceOrigin dstOrigin = dst->origin();
     GrSurfaceOrigin srcOrigin = src->origin();
 
@@ -2756,7 +2756,7 @@
     }
 }
 
-bool GrGLCaps::surfaceSupportsWritePixels(const GrSurface* surface) const {
+bool GrGLCaps::onSurfaceSupportsWritePixels(const GrSurface* surface) const {
     if (fDisallowTexSubImageForUnormConfigTexturesEverBoundToFBO) {
         if (auto tex = static_cast<const GrGLTexture*>(surface->asTexture())) {
             if (tex->hasBaseLevelBeenBoundToFBO()) {
diff --git a/src/gpu/gl/GrGLCaps.h b/src/gpu/gl/GrGLCaps.h
index 4cdd316..54dc126 100644
--- a/src/gpu/gl/GrGLCaps.h
+++ b/src/gpu/gl/GrGLCaps.h
@@ -311,7 +311,6 @@
     /// Use indices or vertices in CPU arrays rather than VBOs for dynamic content.
     bool useNonVBOVertexAndIndexDynamicData() const { return fUseNonVBOVertexAndIndexDynamicData; }
 
-    bool surfaceSupportsWritePixels(const GrSurface*) const override;
     bool surfaceSupportsReadPixels(const GrSurface*) const override;
     GrColorType supportedReadPixelsColorType(GrPixelConfig, GrColorType) const override;
 
@@ -419,9 +418,6 @@
                        const SkIRect& srcRect, const SkIPoint& dstPoint) const;
     bool canCopyAsDraw(GrPixelConfig dstConfig, bool srcIsTextureable) const;
 
-    bool canCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
-                        const SkIRect& srcRect, const SkIPoint& dstPoint) const override;
-
     bool initDescForDstCopy(const GrRenderTargetProxy* src, GrSurfaceDesc* desc, GrSurfaceOrigin*,
                             bool* rectsMustMatch, bool* disallowSubrect) const override;
 
@@ -480,6 +476,9 @@
     // This must be called after initFSAASupport().
     void initConfigTable(const GrContextOptions&, const GrGLContextInfo&, const GrGLInterface*,
                          GrShaderCaps*);
+    bool onSurfaceSupportsWritePixels(const GrSurface*) const override;
+    bool onCanCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
+                          const SkIRect& srcRect, const SkIPoint& dstPoint) const override;
 
     GrGLStandard fStandard;
 
diff --git a/src/gpu/gl/GrGLGpu.cpp b/src/gpu/gl/GrGLGpu.cpp
index 63bf032..d344c3b 100644
--- a/src/gpu/gl/GrGLGpu.cpp
+++ b/src/gpu/gl/GrGLGpu.cpp
@@ -652,7 +652,8 @@
 }
 
 sk_sp<GrTexture> GrGLGpu::onWrapBackendTexture(const GrBackendTexture& backendTex,
-                                               GrWrapOwnership ownership, bool purgeImmediately) {
+                                               GrWrapOwnership ownership, GrIOType ioType,
+                                               bool purgeImmediately) {
     GrGLTexture::IDDesc idDesc;
     if (!check_backend_texture(backendTex, this->glCaps(), &idDesc)) {
         return nullptr;
@@ -676,7 +677,7 @@
     GrMipMapsStatus mipMapsStatus = backendTex.hasMipMaps() ? GrMipMapsStatus::kValid
                                                             : GrMipMapsStatus::kNotAllocated;
 
-    auto texture = GrGLTexture::MakeWrapped(this, surfDesc, mipMapsStatus, idDesc,
+    auto texture = GrGLTexture::MakeWrapped(this, surfDesc, mipMapsStatus, idDesc, ioType,
                                             purgeImmediately);
     // We don't know what parameters are already set on wrapped textures.
     texture->textureParamsModified();
diff --git a/src/gpu/gl/GrGLGpu.h b/src/gpu/gl/GrGLGpu.h
index eb920db..f74b98e 100644
--- a/src/gpu/gl/GrGLGpu.h
+++ b/src/gpu/gl/GrGLGpu.h
@@ -189,7 +189,7 @@
     GrBuffer* onCreateBuffer(size_t size, GrBufferType intendedType, GrAccessPattern,
                              const void* data) override;
 
-    sk_sp<GrTexture> onWrapBackendTexture(const GrBackendTexture&, GrWrapOwnership,
+    sk_sp<GrTexture> onWrapBackendTexture(const GrBackendTexture&, GrWrapOwnership, GrIOType,
                                           bool purgeImmediately) override;
     sk_sp<GrTexture> onWrapRenderableBackendTexture(const GrBackendTexture&,
                                                     int sampleCnt,
diff --git a/src/gpu/gl/GrGLTexture.cpp b/src/gpu/gl/GrGLTexture.cpp
index 2d432fe..06bf662 100644
--- a/src/gpu/gl/GrGLTexture.cpp
+++ b/src/gpu/gl/GrGLTexture.cpp
@@ -51,12 +51,15 @@
 }
 
 GrGLTexture::GrGLTexture(GrGLGpu* gpu, Wrapped, const GrSurfaceDesc& desc,
-                         GrMipMapsStatus mipMapsStatus, const IDDesc& idDesc,
+                         GrMipMapsStatus mipMapsStatus, const IDDesc& idDesc, GrIOType ioType,
                          bool purgeImmediately)
         : GrSurface(gpu, desc)
         , INHERITED(gpu, desc, TextureTypeFromTarget(idDesc.fInfo.fTarget), mipMapsStatus) {
     this->init(desc, idDesc);
     this->registerWithCacheWrapped(purgeImmediately);
+    if (ioType == kRead_GrIOType) {
+        this->setReadOnly();
+    }
 }
 
 GrGLTexture::GrGLTexture(GrGLGpu* gpu, const GrSurfaceDesc& desc, const IDDesc& idDesc,
@@ -111,9 +114,9 @@
 
 sk_sp<GrGLTexture> GrGLTexture::MakeWrapped(GrGLGpu* gpu, const GrSurfaceDesc& desc,
                                             GrMipMapsStatus mipMapsStatus, const IDDesc& idDesc,
-                                            bool purgeImmediately) {
-    return sk_sp<GrGLTexture>(new GrGLTexture(gpu, kWrapped, desc, mipMapsStatus, idDesc,
-                                              purgeImmediately));
+                                            GrIOType ioType, bool purgeImmediately) {
+    return sk_sp<GrGLTexture>(
+            new GrGLTexture(gpu, kWrapped, desc, mipMapsStatus, idDesc, ioType, purgeImmediately));
 }
 
 bool GrGLTexture::onStealBackendTexture(GrBackendTexture* backendTexture,
diff --git a/src/gpu/gl/GrGLTexture.h b/src/gpu/gl/GrGLTexture.h
index a9d7a38..290729b 100644
--- a/src/gpu/gl/GrGLTexture.h
+++ b/src/gpu/gl/GrGLTexture.h
@@ -100,7 +100,7 @@
     void baseLevelWasBoundToFBO() { fBaseLevelHasBeenBoundToFBO = true; }
 
     static sk_sp<GrGLTexture> MakeWrapped(GrGLGpu*, const GrSurfaceDesc&, GrMipMapsStatus,
-                                          const IDDesc&, bool purgeImmediately);
+                                          const IDDesc&, GrIOType, bool purgeImmediately);
 
     void dumpMemoryStatistics(SkTraceMemoryDump* traceMemoryDump) const override;
 
@@ -110,7 +110,7 @@
 
     enum Wrapped { kWrapped };
     // Constructor for instances wrapping backend objects.
-    GrGLTexture(GrGLGpu*, Wrapped, const GrSurfaceDesc&, GrMipMapsStatus, const IDDesc&,
+    GrGLTexture(GrGLGpu*, Wrapped, const GrSurfaceDesc&, GrMipMapsStatus, const IDDesc&, GrIOType,
                 bool purgeImmediately);
 
     void init(const GrSurfaceDesc&, const IDDesc&);
diff --git a/src/gpu/mock/GrMockCaps.h b/src/gpu/mock/GrMockCaps.h
index d24afa5..e940423 100644
--- a/src/gpu/mock/GrMockCaps.h
+++ b/src/gpu/mock/GrMockCaps.h
@@ -66,14 +66,8 @@
         return 0;
     }
 
-    bool surfaceSupportsWritePixels(const GrSurface*) const override { return true; }
     bool surfaceSupportsReadPixels(const GrSurface*) const override { return true; }
 
-    bool canCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
-                        const SkIRect& srcRect, const SkIPoint& dstPoint) const override {
-        return true;
-    }
-
     bool initDescForDstCopy(const GrRenderTargetProxy* src, GrSurfaceDesc* desc, GrSurfaceOrigin*,
                             bool* rectsMustMatch, bool* disallowSubrect) const override {
         return false;
@@ -142,6 +136,11 @@
         SkAssertResult(backendTex.getMockTextureInfo(&mockInfo));
         return GrBackendFormat::MakeMock(mockInfo.fConfig);
     }
+    bool onSurfaceSupportsWritePixels(const GrSurface*) const override { return true; }
+    bool onCanCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
+                          const SkIRect& srcRect, const SkIPoint& dstPoint) const override {
+        return true;
+    }
 
     static const int kMaxSampleCnt = 16;
 
diff --git a/src/gpu/mock/GrMockGpu.cpp b/src/gpu/mock/GrMockGpu.cpp
index 2de25ef..4f2c4cd 100644
--- a/src/gpu/mock/GrMockGpu.cpp
+++ b/src/gpu/mock/GrMockGpu.cpp
@@ -103,7 +103,8 @@
 }
 
 sk_sp<GrTexture> GrMockGpu::onWrapBackendTexture(const GrBackendTexture& tex,
-                                                 GrWrapOwnership ownership, bool purgeImmediately) {
+                                                 GrWrapOwnership ownership, GrIOType ioType,
+                                                 bool purgeImmediately) {
     GrSurfaceDesc desc;
     desc.fWidth = tex.width();
     desc.fHeight = tex.height();
@@ -116,7 +117,7 @@
                                                      : GrMipMapsStatus::kNotAllocated;
 
     return sk_sp<GrTexture>(new GrMockTexture(this, GrMockTexture::kWrapped, desc, mipMapsStatus,
-                                              info, purgeImmediately));
+                                              info, ioType, purgeImmediately));
 }
 
 sk_sp<GrTexture> GrMockGpu::onWrapRenderableBackendTexture(const GrBackendTexture& tex,
diff --git a/src/gpu/mock/GrMockGpu.h b/src/gpu/mock/GrMockGpu.h
index a39a82b..832877a 100644
--- a/src/gpu/mock/GrMockGpu.h
+++ b/src/gpu/mock/GrMockGpu.h
@@ -59,7 +59,7 @@
     sk_sp<GrTexture> onCreateTexture(const GrSurfaceDesc&, SkBudgeted, const GrMipLevel[],
                                      int mipLevelCount) override;
 
-    sk_sp<GrTexture> onWrapBackendTexture(const GrBackendTexture&, GrWrapOwnership,
+    sk_sp<GrTexture> onWrapBackendTexture(const GrBackendTexture&, GrWrapOwnership, GrIOType,
                                           bool purgeImmediately) override;
 
     sk_sp<GrTexture> onWrapRenderableBackendTexture(const GrBackendTexture&,
diff --git a/src/gpu/mock/GrMockTexture.h b/src/gpu/mock/GrMockTexture.h
index 0565f81..ee8780d 100644
--- a/src/gpu/mock/GrMockTexture.h
+++ b/src/gpu/mock/GrMockTexture.h
@@ -23,10 +23,12 @@
     }
 
     enum Wrapped { kWrapped };
-    GrMockTexture(GrMockGpu* gpu, Wrapped, const GrSurfaceDesc& desc,
-                  GrMipMapsStatus mipMapsStatus, const GrMockTextureInfo& info,
-                  bool purgeImmediately)
+    GrMockTexture(GrMockGpu* gpu, Wrapped, const GrSurfaceDesc& desc, GrMipMapsStatus mipMapsStatus,
+                  const GrMockTextureInfo& info, GrIOType ioType, bool purgeImmediately)
             : GrMockTexture(gpu, desc, mipMapsStatus, info) {
+        if (ioType == kRead_GrIOType) {
+            this->setReadOnly();
+        }
         this->registerWithCacheWrapped(purgeImmediately);
     }
 
diff --git a/src/gpu/mtl/GrMtlCaps.h b/src/gpu/mtl/GrMtlCaps.h
index 7edfa79..9d7b86f 100644
--- a/src/gpu/mtl/GrMtlCaps.h
+++ b/src/gpu/mtl/GrMtlCaps.h
@@ -33,7 +33,6 @@
     int getRenderTargetSampleCount(int requestedCount, GrPixelConfig) const override;
     int maxRenderTargetSampleCount(GrPixelConfig) const override;
 
-    bool surfaceSupportsWritePixels(const GrSurface*) const override { return true; }
     bool surfaceSupportsReadPixels(const GrSurface*) const override { return true; }
 
     bool isConfigCopyable(GrPixelConfig config) const override {
@@ -58,9 +57,6 @@
     bool canCopyAsDrawThenBlit(GrPixelConfig dstConfig, GrPixelConfig srcConfig,
                                bool srcIsTextureable) const;
 
-    bool canCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
-                        const SkIRect& srcRect, const SkIPoint& dstPoint) const override;
-
     bool initDescForDstCopy(const GrRenderTargetProxy* src, GrSurfaceDesc* desc, GrSurfaceOrigin*,
                             bool* rectsMustMatch, bool* disallowSubrect) const override {
         return false;
@@ -109,6 +105,10 @@
 
     void initConfigTable();
 
+    bool onSurfaceSupportsWritePixels(const GrSurface*) const override { return true; }
+    bool onCanCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
+                          const SkIRect& srcRect, const SkIPoint& dstPoint) const override;
+
     struct ConfigInfo {
         ConfigInfo() : fFlags(0) {}
 
diff --git a/src/gpu/mtl/GrMtlCaps.mm b/src/gpu/mtl/GrMtlCaps.mm
index ca3779b..880b0fa 100644
--- a/src/gpu/mtl/GrMtlCaps.mm
+++ b/src/gpu/mtl/GrMtlCaps.mm
@@ -166,8 +166,8 @@
     return true;
 }
 
-bool GrMtlCaps::canCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
-                               const SkIRect& srcRect, const SkIPoint& dstPoint) const {
+bool GrMtlCaps::onCanCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
+                                 const SkIRect& srcRect, const SkIPoint& dstPoint) const {
     GrSurfaceOrigin dstOrigin = dst->origin();
     GrSurfaceOrigin srcOrigin = src->origin();
 
diff --git a/src/gpu/mtl/GrMtlGpu.h b/src/gpu/mtl/GrMtlGpu.h
index a727784..607f704 100644
--- a/src/gpu/mtl/GrMtlGpu.h
+++ b/src/gpu/mtl/GrMtlGpu.h
@@ -132,7 +132,7 @@
     sk_sp<GrTexture> onCreateTexture(const GrSurfaceDesc& desc, SkBudgeted budgeted,
                                      const GrMipLevel texels[], int mipLevelCount) override;
 
-    sk_sp<GrTexture> onWrapBackendTexture(const GrBackendTexture&, GrWrapOwnership,
+    sk_sp<GrTexture> onWrapBackendTexture(const GrBackendTexture&, GrWrapOwnership, GrIOType,
                                           bool purgeImmediately) override;
 
     sk_sp<GrTexture> onWrapRenderableBackendTexture(const GrBackendTexture&,
diff --git a/src/gpu/mtl/GrMtlGpu.mm b/src/gpu/mtl/GrMtlGpu.mm
index 0661648..132f455 100644
--- a/src/gpu/mtl/GrMtlGpu.mm
+++ b/src/gpu/mtl/GrMtlGpu.mm
@@ -338,7 +338,8 @@
 }
 
 sk_sp<GrTexture> GrMtlGpu::onWrapBackendTexture(const GrBackendTexture& backendTex,
-                                                GrWrapOwnership ownership, bool purgeImmediately) {
+                                                GrWrapOwnership ownership, GrIOType ioType,
+                                                bool purgeImmediately) {
     id<MTLTexture> mtlTexture = get_texture_from_backend(backendTex, ownership);
     if (!mtlTexture) {
         return nullptr;
@@ -347,7 +348,7 @@
     GrSurfaceDesc surfDesc;
     init_surface_desc(&surfDesc, mtlTexture, false, backendTex.config());
 
-    return GrMtlTexture::MakeWrappedTexture(this, surfDesc, mtlTexture, purgeImmediately);
+    return GrMtlTexture::MakeWrappedTexture(this, surfDesc, mtlTexture, ioType, purgeImmediately);
 }
 
 sk_sp<GrTexture> GrMtlGpu::onWrapRenderableBackendTexture(const GrBackendTexture& backendTex,
diff --git a/src/gpu/mtl/GrMtlTexture.h b/src/gpu/mtl/GrMtlTexture.h
index 5f6234e..7564f94 100644
--- a/src/gpu/mtl/GrMtlTexture.h
+++ b/src/gpu/mtl/GrMtlTexture.h
@@ -21,8 +21,8 @@
                                                 MTLTextureDescriptor*,
                                                 GrMipMapsStatus);
 
-    static sk_sp<GrMtlTexture> MakeWrappedTexture(GrMtlGpu*, const GrSurfaceDesc&,
-                                                  id<MTLTexture>, bool purgeImmediately);
+    static sk_sp<GrMtlTexture> MakeWrappedTexture(GrMtlGpu*, const GrSurfaceDesc&, id<MTLTexture>,
+                                                  GrIOType, bool purgeImmediately);
 
     ~GrMtlTexture() override;
 
@@ -65,7 +65,7 @@
                  GrMipMapsStatus);
 
     GrMtlTexture(GrMtlGpu*, Wrapped, const GrSurfaceDesc&, id<MTLTexture>, GrMipMapsStatus,
-                 bool purgeImmediately);
+                 GrIOType, bool purgeImmediately);
 
     id<MTLTexture> fTexture;
 
diff --git a/src/gpu/mtl/GrMtlTexture.mm b/src/gpu/mtl/GrMtlTexture.mm
index 711d5ae..5e91746 100644
--- a/src/gpu/mtl/GrMtlTexture.mm
+++ b/src/gpu/mtl/GrMtlTexture.mm
@@ -28,11 +28,15 @@
                            const GrSurfaceDesc& desc,
                            id<MTLTexture> texture,
                            GrMipMapsStatus mipMapsStatus,
+                           GrIOType ioType,
                            bool purgeImmediately)
         : GrSurface(gpu, desc)
         , INHERITED(gpu, desc, GrTextureType::k2D, mipMapsStatus)
         , fTexture(texture) {
     SkASSERT((GrMipMapsStatus::kNotAllocated == mipMapsStatus) == (1 == texture.mipmapLevelCount));
+    if (ioType == kRead_GrIOType) {
+        this->setReadOnly();
+    }
     this->registerWithCacheWrapped(purgeImmediately);
 }
 
@@ -63,6 +67,7 @@
 sk_sp<GrMtlTexture> GrMtlTexture::MakeWrappedTexture(GrMtlGpu* gpu,
                                                      const GrSurfaceDesc& desc,
                                                      id<MTLTexture> texture,
+                                                     GrIOType ioType,
                                                      bool purgeImmediately) {
     if (desc.fSampleCnt > 1) {
         SkASSERT(false); // Currently we don't support msaa
@@ -72,7 +77,7 @@
     SkASSERT(MTLTextureUsageShaderRead & texture.usage);
     GrMipMapsStatus mipMapsStatus = texture.mipmapLevelCount > 1 ? GrMipMapsStatus::kValid
                                                                  : GrMipMapsStatus::kNotAllocated;
-    return sk_sp<GrMtlTexture>(new GrMtlTexture(gpu, kWrapped, desc, texture, mipMapsStatus,
+    return sk_sp<GrMtlTexture>(new GrMtlTexture(gpu, kWrapped, desc, texture, mipMapsStatus, ioType,
                                                 purgeImmediately));
 }
 
diff --git a/src/gpu/vk/GrVkCaps.cpp b/src/gpu/vk/GrVkCaps.cpp
index fbd381f..75911b6 100644
--- a/src/gpu/vk/GrVkCaps.cpp
+++ b/src/gpu/vk/GrVkCaps.cpp
@@ -158,8 +158,8 @@
     return true;
 }
 
-bool GrVkCaps::canCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
-                              const SkIRect& srcRect, const SkIPoint& dstPoint) const {
+bool GrVkCaps::onCanCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
+                                const SkIRect& srcRect, const SkIPoint& dstPoint) const {
     GrSurfaceOrigin dstOrigin = dst->origin();
     GrSurfaceOrigin srcOrigin = src->origin();
 
@@ -698,7 +698,7 @@
     return table[table.count() - 1];
 }
 
-bool GrVkCaps::surfaceSupportsWritePixels(const GrSurface* surface) const {
+bool GrVkCaps::onSurfaceSupportsWritePixels(const GrSurface* surface) const {
     if (auto rt = surface->asRenderTarget()) {
         return rt->numColorSamples() <= 1 && SkToBool(surface->asTexture());
     }
diff --git a/src/gpu/vk/GrVkCaps.h b/src/gpu/vk/GrVkCaps.h
index a20a104..9514d41 100644
--- a/src/gpu/vk/GrVkCaps.h
+++ b/src/gpu/vk/GrVkCaps.h
@@ -43,7 +43,6 @@
     int getRenderTargetSampleCount(int requestedCount, GrPixelConfig config) const override;
     int maxRenderTargetSampleCount(GrPixelConfig config) const override;
 
-    bool surfaceSupportsWritePixels(const GrSurface*) const override;
     bool surfaceSupportsReadPixels(const GrSurface*) const override { return true; }
 
     bool isConfigTexturableLinearly(GrPixelConfig config) const {
@@ -151,9 +150,6 @@
     bool canCopyAsDraw(GrPixelConfig dstConfig, bool dstIsRenderable,
                        GrPixelConfig srcConfig, bool srcIsTextureable) const;
 
-    bool canCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
-                        const SkIRect& srcRect, const SkIPoint& dstPoint) const override;
-
     bool initDescForDstCopy(const GrRenderTargetProxy* src, GrSurfaceDesc* desc, GrSurfaceOrigin*,
                             bool* rectsMustMatch, bool* disallowSubrect) const override;
 
@@ -201,6 +197,10 @@
 
     void applyDriverCorrectnessWorkarounds(const VkPhysicalDeviceProperties&);
 
+    bool onSurfaceSupportsWritePixels(const GrSurface*) const override;
+    bool onCanCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
+                          const SkIRect& srcRect, const SkIPoint& dstPoint) const override;
+
     struct ConfigInfo {
         ConfigInfo() : fOptimalFlags(0), fLinearFlags(0) {}
 
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index ca48271..1c02e33 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -888,7 +888,8 @@
 }
 
 sk_sp<GrTexture> GrVkGpu::onWrapBackendTexture(const GrBackendTexture& backendTex,
-                                               GrWrapOwnership ownership, bool purgeImmediately) {
+                                               GrWrapOwnership ownership, GrIOType ioType,
+                                               bool purgeImmediately) {
     GrVkImageInfo imageInfo;
     if (!backendTex.getVkImageInfo(&imageInfo)) {
         return nullptr;
@@ -907,7 +908,7 @@
 
     sk_sp<GrVkImageLayout> layout = backendTex.getGrVkImageLayout();
     SkASSERT(layout);
-    return GrVkTexture::MakeWrappedTexture(this, surfDesc, ownership, purgeImmediately,
+    return GrVkTexture::MakeWrappedTexture(this, surfDesc, ownership, ioType, purgeImmediately,
                                            imageInfo, std::move(layout));
 }
 
diff --git a/src/gpu/vk/GrVkGpu.h b/src/gpu/vk/GrVkGpu.h
index c195d3b..32a7c89 100644
--- a/src/gpu/vk/GrVkGpu.h
+++ b/src/gpu/vk/GrVkGpu.h
@@ -170,7 +170,7 @@
     sk_sp<GrTexture> onCreateTexture(const GrSurfaceDesc&, SkBudgeted, const GrMipLevel[],
                                      int mipLevelCount) override;
 
-    sk_sp<GrTexture> onWrapBackendTexture(const GrBackendTexture&, GrWrapOwnership,
+    sk_sp<GrTexture> onWrapBackendTexture(const GrBackendTexture&, GrWrapOwnership, GrIOType,
                                           bool purgeImmediately) override;
     sk_sp<GrTexture> onWrapRenderableBackendTexture(const GrBackendTexture&,
                                                     int sampleCnt,
diff --git a/src/gpu/vk/GrVkTexture.cpp b/src/gpu/vk/GrVkTexture.cpp
index 8157433..a295c04 100644
--- a/src/gpu/vk/GrVkTexture.cpp
+++ b/src/gpu/vk/GrVkTexture.cpp
@@ -41,12 +41,16 @@
                          const GrVkImageView* view,
                          GrMipMapsStatus mipMapsStatus,
                          GrBackendObjectOwnership ownership,
+                         GrIOType ioType,
                          bool purgeImmediately)
         : GrSurface(gpu, desc)
         , GrVkImage(info, std::move(layout), ownership)
         , INHERITED(gpu, desc, GrTextureType::k2D, mipMapsStatus)
         , fTextureView(view) {
     SkASSERT((GrMipMapsStatus::kNotAllocated == mipMapsStatus) == (1 == info.fLevelCount));
+    if (ioType == kRead_GrIOType) {
+        this->setReadOnly();
+    }
     this->registerWithCacheWrapped(purgeImmediately);
 }
 
@@ -92,6 +96,7 @@
 sk_sp<GrVkTexture> GrVkTexture::MakeWrappedTexture(GrVkGpu* gpu,
                                                    const GrSurfaceDesc& desc,
                                                    GrWrapOwnership wrapOwnership,
+                                                   GrIOType ioType,
                                                    bool purgeImmediately,
                                                    const GrVkImageInfo& info,
                                                    sk_sp<GrVkImageLayout> layout) {
@@ -111,7 +116,7 @@
     GrBackendObjectOwnership ownership = kBorrow_GrWrapOwnership == wrapOwnership
             ? GrBackendObjectOwnership::kBorrowed : GrBackendObjectOwnership::kOwned;
     return sk_sp<GrVkTexture>(new GrVkTexture(gpu, kWrapped, desc, info, std::move(layout),
-                                              imageView, mipMapsStatus, ownership,
+                                              imageView, mipMapsStatus, ownership, ioType,
                                               purgeImmediately));
 }
 
diff --git a/src/gpu/vk/GrVkTexture.h b/src/gpu/vk/GrVkTexture.h
index d841bf3..b85dee0 100644
--- a/src/gpu/vk/GrVkTexture.h
+++ b/src/gpu/vk/GrVkTexture.h
@@ -25,8 +25,8 @@
                                              const GrVkImage::ImageDesc&,
                                              GrMipMapsStatus);
 
-    static sk_sp<GrVkTexture> MakeWrappedTexture(GrVkGpu*, const GrSurfaceDesc&,
-                                                 GrWrapOwnership, bool purgeImmediatley,
+    static sk_sp<GrVkTexture> MakeWrappedTexture(GrVkGpu*, const GrSurfaceDesc&, GrWrapOwnership,
+                                                 GrIOType, bool purgeImmediately,
                                                  const GrVkImageInfo&, sk_sp<GrVkImageLayout>);
 
     ~GrVkTexture() override;
@@ -66,7 +66,7 @@
                 GrMipMapsStatus);
     GrVkTexture(GrVkGpu*, Wrapped, const GrSurfaceDesc&, const GrVkImageInfo&,
                 sk_sp<GrVkImageLayout> layout, const GrVkImageView* imageView, GrMipMapsStatus,
-                GrBackendObjectOwnership, bool purgeImmediately);
+                GrBackendObjectOwnership, GrIOType ioType, bool purgeImmediately);
 
     const GrVkImageView*     fTextureView;
 
diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp
index 600ba39..2404f36 100644
--- a/src/image/SkImage_Gpu.cpp
+++ b/src/image/SkImage_Gpu.cpp
@@ -74,8 +74,8 @@
     }
 
     GrProxyProvider* proxyProvider = ctx->contextPriv().proxyProvider();
-    sk_sp<GrTextureProxy> proxy = proxyProvider->wrapBackendTexture(backendTex, origin, ownership,
-                                                                    releaseProc, releaseCtx);
+    sk_sp<GrTextureProxy> proxy = proxyProvider->wrapBackendTexture(
+            backendTex, origin, ownership, kRead_GrIOType, releaseProc, releaseCtx);
     if (!proxy) {
         return nullptr;
     }
@@ -373,6 +373,7 @@
     desc.fHeight = height;
     desc.fConfig = config;
 
+    // We pass kReadOnly here since we should treat content of the client's texture as immutable.
     sk_sp<GrTextureProxy> proxy = proxyProvider->createLazyProxy(
             [promiseHelper, config](GrResourceProvider* resourceProvider) mutable {
                 if (!resourceProvider) {
@@ -382,7 +383,7 @@
 
                 return promiseHelper.getTexture(resourceProvider, config);
             },
-            backendFormat, desc, origin, mipMapped, GrInternalSurfaceFlags::kNone,
+            backendFormat, desc, origin, mipMapped, GrInternalSurfaceFlags::kReadOnly,
             SkBackingFit::kExact, SkBudgeted::kNo,
             GrSurfaceProxy::LazyInstantiationType::kUninstantiate);
 
@@ -534,7 +535,7 @@
             },
             yuvaFormats[yuvaIndices[SkYUVAIndex::kY_Index].fIndex],
             desc, imageOrigin, GrMipMapped::kNo,
-            GrInternalSurfaceFlags::kNone, SkBackingFit::kExact, SkBudgeted::kNo,
+            GrInternalSurfaceFlags::kReadOnly, SkBackingFit::kExact, SkBudgeted::kNo,
             GrSurfaceProxy::LazyInstantiationType::kUninstantiate);
 
     if (!proxy) {
diff --git a/src/image/SkImage_GpuBase.cpp b/src/image/SkImage_GpuBase.cpp
index 4dfc483..b12fee1 100644
--- a/src/image/SkImage_GpuBase.cpp
+++ b/src/image/SkImage_GpuBase.cpp
@@ -320,7 +320,8 @@
         SkASSERT(yuvaTexturesCopy[textureIndex].isValid());
 
         tempTextureProxies[textureIndex] =
-            proxyProvider->wrapBackendTexture(yuvaTexturesCopy[textureIndex], imageOrigin);
+                proxyProvider->wrapBackendTexture(yuvaTexturesCopy[textureIndex], imageOrigin,
+                                                  kBorrow_GrWrapOwnership, kRead_GrIOType);
         if (!tempTextureProxies[textureIndex]) {
             return false;
         }
@@ -400,7 +401,8 @@
             return sk_sp<GrTexture>();
         }
 
-        tex = resourceProvider->wrapBackendTexture(fBackendTex, kBorrow_GrWrapOwnership);
+        tex = resourceProvider->wrapBackendTexture(fBackendTex, kBorrow_GrWrapOwnership,
+                                                   kRead_GrIOType);
         if (!tex) {
             // Even though the GrBackendTexture is not valid, we must call the release
             // proc to keep our contract of always calling Fulfill and Release in pairs.
@@ -412,7 +414,8 @@
         fReleaseHelper->weak_ref();
     } else {
         SkASSERT(fBackendTex.isValid());
-        tex = resourceProvider->wrapBackendTexture(fBackendTex, kBorrow_GrWrapOwnership);
+        tex = resourceProvider->wrapBackendTexture(fBackendTex, kBorrow_GrWrapOwnership,
+                                                   kRead_GrIOType);
         if (!tex) {
             // We weren't able to make a texture here, but since we are in this branch
             // of the calls (promiseHelper.fReleaseHelper is valid) there is already a
diff --git a/src/image/SkImage_GpuYUVA.cpp b/src/image/SkImage_GpuYUVA.cpp
index 8317521..8932e8f 100644
--- a/src/image/SkImage_GpuYUVA.cpp
+++ b/src/image/SkImage_GpuYUVA.cpp
@@ -310,7 +310,7 @@
         desc.fSampleCnt = 1;
         proxies[texIdx] = proxyProvider->createLazyProxy(
                             std::move(lazyInstCallback), yuvaFormats[texIdx], desc, imageOrigin,
-                            GrMipMapped::kNo, GrInternalSurfaceFlags::kNone,
+                            GrMipMapped::kNo, GrInternalSurfaceFlags::kReadOnly,
                             SkBackingFit::kExact, SkBudgeted::kNo,
                             GrSurfaceProxy::LazyInstantiationType::kUninstantiate);
         if (!proxies[texIdx]) {
diff --git a/tests/GrPorterDuffTest.cpp b/tests/GrPorterDuffTest.cpp
index 2bbfa4c..f94e274 100644
--- a/tests/GrPorterDuffTest.cpp
+++ b/tests/GrPorterDuffTest.cpp
@@ -1068,8 +1068,8 @@
 
     GrXferProcessor::DstProxy fakeDstProxy;
     {
-        sk_sp<GrTextureProxy> proxy =
-                proxyProvider->wrapBackendTexture(backendTex, kTopLeft_GrSurfaceOrigin);
+        sk_sp<GrTextureProxy> proxy = proxyProvider->wrapBackendTexture(
+                backendTex, kTopLeft_GrSurfaceOrigin, kBorrow_GrWrapOwnership, kRead_GrIOType);
         fakeDstProxy.setProxy(std::move(proxy));
     }
 
diff --git a/tests/GrSurfaceTest.cpp b/tests/GrSurfaceTest.cpp
index d3cc2f4..693fc54 100644
--- a/tests/GrSurfaceTest.cpp
+++ b/tests/GrSurfaceTest.cpp
@@ -5,8 +5,6 @@
  * found in the LICENSE file.
  */
 
-#include "SkTypes.h"
-
 #include "GrContext.h"
 #include "GrContextPriv.h"
 #include "GrGpu.h"
@@ -14,7 +12,10 @@
 #include "GrRenderTarget.h"
 #include "GrResourceProvider.h"
 #include "GrTexture.h"
+#include "GrTexturePriv.h"
+#include "SkAutoPixmapStorage.h"
 #include "SkMipMap.h"
+#include "SkTypes.h"
 #include "Test.h"
 
 // Tests that GrSurface::asTexture(), GrSurface::asRenderTarget(), and static upcasting of texture
@@ -236,3 +237,94 @@
         }
     }
 }
+
+DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadOnlyTexture, reporter, context_info) {
+    auto fillPixels = [](const SkPixmap* p, const std::function<uint32_t(int x, int y)>& f) {
+        for (int y = 0; y < p->height(); ++y) {
+            for (int x = 0; x < p->width(); ++x) {
+                *p->writable_addr32(x, y) = f(x, y);
+            }
+        }
+    };
+
+    auto comparePixels = [](const SkPixmap& p1, const SkPixmap& p2, skiatest::Reporter* reporter) {
+        SkASSERT(p1.info() == p2.info());
+        for (int y = 0; y < p1.height(); ++y) {
+            for (int x = 0; x < p1.width(); ++x) {
+                REPORTER_ASSERT(reporter, p1.getColor(x, y) == p2.getColor(x, y));
+                if (p1.getColor(x, y) != p2.getColor(x, y)) {
+                    return;
+                }
+            }
+        }
+    };
+
+    static constexpr int kSize = 100;
+    SkAutoPixmapStorage pixels;
+    pixels.alloc(SkImageInfo::Make(kSize, kSize, kRGBA_8888_SkColorType, kPremul_SkAlphaType));
+    fillPixels(&pixels,
+               [](int x, int y) { return (0xFFU << 24) | (x << 16) | (y << 8) | uint8_t(x * y); });
+
+    GrContext* context = context_info.grContext();
+    GrProxyProvider* proxyProvider = context->contextPriv().proxyProvider();
+
+    // We test both kRW in addition to kRead mostly to ensure that the calls are structured such
+    // that they'd succeed if the texture wasn't kRead. We want to be sure we're failing with
+    // kRead for the right reason.
+    for (auto ioType : {kRead_GrIOType, kRW_GrIOType}) {
+        auto backendTex = context->contextPriv().getGpu()->createTestingOnlyBackendTexture(
+                pixels.addr(), kSize, kSize, kRGBA_8888_SkColorType, true, GrMipMapped::kNo);
+        auto proxy = proxyProvider->wrapBackendTexture(backendTex, kTopLeft_GrSurfaceOrigin,
+                                                       kBorrow_GrWrapOwnership, ioType);
+        auto surfContext = context->contextPriv().makeWrappedSurfaceContext(proxy);
+
+        // Read pixels should work with a read-only texture.
+        SkAutoPixmapStorage read;
+        read.alloc(pixels.info());
+        auto readResult = surfContext->readPixels(pixels.info(), read.writable_addr(), 0, 0, 0);
+        REPORTER_ASSERT(reporter, readResult);
+        if (readResult) {
+            comparePixels(pixels, read, reporter);
+        }
+
+        // Write pixels should not work with a read-only texture.
+        SkAutoPixmapStorage write;
+        write.alloc(pixels.info());
+        fillPixels(&write, [&pixels](int x, int y) { return ~*pixels.addr32(); });
+        auto writeResult = surfContext->writePixels(pixels.info(), pixels.addr(), 0, 0, 0);
+        REPORTER_ASSERT(reporter, writeResult == (ioType == kRW_GrIOType));
+        // Try the low level write.
+        context->flush();
+        auto gpuWriteResult = context->contextPriv().getGpu()->writePixels(
+                proxy->peekTexture(), 0, 0, kSize, kSize, GrColorType::kRGBA_8888, write.addr32(),
+                0);
+        REPORTER_ASSERT(reporter, gpuWriteResult == (ioType == kRW_GrIOType));
+
+        // Copies should not work with a read-only texture
+        auto copySrc = proxyProvider->createTextureProxy(
+                SkImage::MakeFromRaster(write, nullptr, nullptr), kNone_GrSurfaceFlags, 1,
+                SkBudgeted::kYes, SkBackingFit::kExact);
+        REPORTER_ASSERT(reporter, copySrc);
+        auto copyResult = surfContext->copy(copySrc.get());
+        REPORTER_ASSERT(reporter, copyResult == (ioType == kRW_GrIOType));
+        // Try the low level copy.
+        context->flush();
+        auto gpuCopyResult = context->contextPriv().getGpu()->copySurface(
+                proxy->peekTexture(), kTopLeft_GrSurfaceOrigin, copySrc->peekTexture(),
+                kTopLeft_GrSurfaceOrigin, SkIRect::MakeWH(kSize, kSize), {0, 0});
+        REPORTER_ASSERT(reporter, gpuCopyResult == (ioType == kRW_GrIOType));
+
+        // Mip regen should not work with a read only texture.
+        if (context->contextPriv().caps()->mipMapSupport()) {
+            backendTex = context->contextPriv().getGpu()->createTestingOnlyBackendTexture(
+                    nullptr, kSize, kSize, kRGBA_8888_SkColorType, true, GrMipMapped::kYes);
+            proxy = proxyProvider->wrapBackendTexture(backendTex, kTopLeft_GrSurfaceOrigin,
+                                                      kBorrow_GrWrapOwnership, ioType);
+            context->flush();
+            proxy->peekTexture()->texturePriv().markMipMapsDirty();  // avoids assert in GrGpu.
+            auto regenResult =
+                    context->contextPriv().getGpu()->regenerateMipMapLevels(proxy->peekTexture());
+            REPORTER_ASSERT(reporter, regenResult == (ioType == kRW_GrIOType));
+        }
+    }
+}
diff --git a/tests/GrTestingBackendTextureUploadTest.cpp b/tests/GrTestingBackendTextureUploadTest.cpp
index 979d05e..9ff0e50 100644
--- a/tests/GrTestingBackendTextureUploadTest.cpp
+++ b/tests/GrTestingBackendTextureUploadTest.cpp
@@ -50,9 +50,8 @@
         wrappedTex = gpu->wrapRenderableBackendTexture(backendTex, 1,
                                                        GrWrapOwnership::kAdopt_GrWrapOwnership);
     } else {
-        wrappedTex = gpu->wrapBackendTexture(backendTex,
-                                             GrWrapOwnership::kAdopt_GrWrapOwnership,
-                                             false);
+        wrappedTex = gpu->wrapBackendTexture(backendTex, GrWrapOwnership::kAdopt_GrWrapOwnership,
+                                             kRead_GrIOType, false);
     }
     REPORTER_ASSERT(reporter, wrappedTex);
 
diff --git a/tests/LazyProxyTest.cpp b/tests/LazyProxyTest.cpp
index 8b106f0..e3fea66 100644
--- a/tests/LazyProxyTest.cpp
+++ b/tests/LazyProxyTest.cpp
@@ -469,7 +469,8 @@
                         return sk_sp<GrTexture>();
                     }
 
-                    sk_sp<GrTexture> texture = rp->wrapBackendTexture(backendTex);
+                    sk_sp<GrTexture> texture = rp->wrapBackendTexture(
+                            backendTex, kBorrow_GrWrapOwnership, kRead_GrIOType);
                     if (!texture) {
                         return sk_sp<GrTexture>();
                     }
@@ -478,7 +479,7 @@
                     return texture;
                 },
                 format, desc, kTopLeft_GrSurfaceOrigin, GrMipMapped::kNo,
-                GrInternalSurfaceFlags::kNone, SkBackingFit::kExact, SkBudgeted::kNo, lazyType);
+                GrInternalSurfaceFlags::kReadOnly, SkBackingFit::kExact, SkBudgeted::kNo, lazyType);
 
         REPORTER_ASSERT(reporter, lazyProxy.get());
 
diff --git a/tests/ProxyTest.cpp b/tests/ProxyTest.cpp
index 9a5a0d1..a52ed8e 100644
--- a/tests/ProxyTest.cpp
+++ b/tests/ProxyTest.cpp
@@ -317,7 +317,7 @@
                                                                  false, GrMipMapped::kNo);
 
                     sk_sp<GrSurfaceProxy> sProxy = proxyProvider->wrapBackendTexture(
-                            backendTex, origin, kBorrow_GrWrapOwnership, nullptr, nullptr);
+                            backendTex, origin, kBorrow_GrWrapOwnership, kRead_GrIOType);
                     if (!sProxy) {
                         gpu->deleteTestingOnlyBackendTexture(backendTex);
                         continue;
diff --git a/tests/RectangleTextureTest.cpp b/tests/RectangleTextureTest.cpp
index 21a9e19..dc1d3b7 100644
--- a/tests/RectangleTextureTest.cpp
+++ b/tests/RectangleTextureTest.cpp
@@ -135,7 +135,8 @@
             }
         }
 
-        sk_sp<GrTextureProxy> rectProxy = proxyProvider->wrapBackendTexture(rectangleTex, origin);
+        sk_sp<GrTextureProxy> rectProxy = proxyProvider->wrapBackendTexture(
+                rectangleTex, origin, kBorrow_GrWrapOwnership, kRW_GrIOType);
 
         if (!rectProxy) {
             ERRORF(reporter, "Error creating proxy for rectangle texture.");
diff --git a/tests/ResourceAllocatorTest.cpp b/tests/ResourceAllocatorTest.cpp
index 58af84e..07d82b1 100644
--- a/tests/ResourceAllocatorTest.cpp
+++ b/tests/ResourceAllocatorTest.cpp
@@ -69,7 +69,8 @@
         return nullptr;
     }
 
-    auto tmp = proxyProvider->wrapBackendTexture(*backendTex, p.fOrigin);
+    auto tmp = proxyProvider->wrapBackendTexture(*backendTex, p.fOrigin, kBorrow_GrWrapOwnership,
+                                                 kRead_GrIOType);
     if (!tmp) {
         return nullptr;
     }
diff --git a/tests/ResourceCacheTest.cpp b/tests/ResourceCacheTest.cpp
index 03ba4d1..1748125 100644
--- a/tests/ResourceCacheTest.cpp
+++ b/tests/ResourceCacheTest.cpp
@@ -223,10 +223,10 @@
     context->resetContext();
 
     sk_sp<GrTexture> borrowed(resourceProvider->wrapBackendTexture(
-            backendTextures[0], kBorrow_GrWrapOwnership));
+            backendTextures[0], kBorrow_GrWrapOwnership, kRead_GrIOType));
 
     sk_sp<GrTexture> adopted(resourceProvider->wrapBackendTexture(
-            backendTextures[1], kAdopt_GrWrapOwnership));
+            backendTextures[1], kAdopt_GrWrapOwnership, kRead_GrIOType));
 
     REPORTER_ASSERT(reporter, borrowed != nullptr && adopted != nullptr);
     if (!borrowed || !adopted) {
diff --git a/tests/TextureProxyTest.cpp b/tests/TextureProxyTest.cpp
index 03ded09..5260a0e 100644
--- a/tests/TextureProxyTest.cpp
+++ b/tests/TextureProxyTest.cpp
@@ -112,7 +112,8 @@
     GrBackendTexture backendTex = (*backingSurface)->getBackendTexture();
     backendTex.setPixelConfig(desc.fConfig);
 
-    return proxyProvider->wrapBackendTexture(backendTex, kBottomLeft_GrSurfaceOrigin);
+    return proxyProvider->wrapBackendTexture(backendTex, kBottomLeft_GrSurfaceOrigin,
+                                             kBorrow_GrWrapOwnership, kRead_GrIOType);
 }
 
 
diff --git a/tests/TraceMemoryDumpTest.cpp b/tests/TraceMemoryDumpTest.cpp
index 32eab62..c58e915 100644
--- a/tests/TraceMemoryDumpTest.cpp
+++ b/tests/TraceMemoryDumpTest.cpp
@@ -128,7 +128,7 @@
     idDesc.fOwnership = GrBackendObjectOwnership::kBorrowed;
 
     auto texture = GrGLTexture::MakeWrapped(gpu, desc, GrMipMapsStatus::kNotAllocated, idDesc,
-                                            false);
+                                            kRead_GrIOType, false);
 
     ValidateMemoryDumps(reporter, context, texture->gpuMemorySize(), false /* isOwned */);
 }
diff --git a/tests/VkWrapTests.cpp b/tests/VkWrapTests.cpp
index 1553334..7c846ad 100644
--- a/tests/VkWrapTests.cpp
+++ b/tests/VkWrapTests.cpp
@@ -42,7 +42,8 @@
     GrVkImageInfo imageInfo;
     SkAssertResult(origBackendTex.getVkImageInfo(&imageInfo));
 
-    sk_sp<GrTexture> tex = gpu->wrapBackendTexture(origBackendTex, kBorrow_GrWrapOwnership, false);
+    sk_sp<GrTexture> tex =
+            gpu->wrapBackendTexture(origBackendTex, kBorrow_GrWrapOwnership, kRead_GrIOType, false);
     REPORTER_ASSERT(reporter, tex);
 
     // image is null
@@ -51,9 +52,9 @@
         backendCopy.fImage = VK_NULL_HANDLE;
         GrBackendTexture backendTex = GrBackendTexture(kW, kH, backendCopy);
         backendTex.setPixelConfig(kPixelConfig);
-        tex = gpu->wrapBackendTexture(backendTex, kBorrow_GrWrapOwnership, false);
+        tex = gpu->wrapBackendTexture(backendTex, kBorrow_GrWrapOwnership, kRead_GrIOType, false);
         REPORTER_ASSERT(reporter, !tex);
-        tex = gpu->wrapBackendTexture(backendTex, kAdopt_GrWrapOwnership, false);
+        tex = gpu->wrapBackendTexture(backendTex, kAdopt_GrWrapOwnership, kRead_GrIOType, false);
         REPORTER_ASSERT(reporter, !tex);
     }
 
@@ -63,9 +64,9 @@
         backendCopy.fAlloc = GrVkAlloc();
         GrBackendTexture backendTex = GrBackendTexture(kW, kH, backendCopy);
         backendTex.setPixelConfig(kPixelConfig);
-        tex = gpu->wrapBackendTexture(backendTex, kBorrow_GrWrapOwnership, false);
+        tex = gpu->wrapBackendTexture(backendTex, kBorrow_GrWrapOwnership, kRead_GrIOType, false);
         REPORTER_ASSERT(reporter, !tex);
-        tex = gpu->wrapBackendTexture(backendTex, kAdopt_GrWrapOwnership, false);
+        tex = gpu->wrapBackendTexture(backendTex, kAdopt_GrWrapOwnership, kRead_GrIOType, false);
         REPORTER_ASSERT(reporter, !tex);
     }
 
@@ -74,7 +75,7 @@
         GrVkImageInfo backendCopy = imageInfo;
         GrBackendTexture backendTex = GrBackendTexture(kW, kH, backendCopy);
         backendTex.setPixelConfig(kPixelConfig);
-        tex = gpu->wrapBackendTexture(backendTex, kAdopt_GrWrapOwnership, false);
+        tex = gpu->wrapBackendTexture(backendTex, kAdopt_GrWrapOwnership, kRead_GrIOType, false);
 
         REPORTER_ASSERT(reporter, tex);
     }
diff --git a/tools/gpu/ProxyUtils.cpp b/tools/gpu/ProxyUtils.cpp
index fc167d8..a1f4df6 100644
--- a/tools/gpu/ProxyUtils.cpp
+++ b/tools/gpu/ProxyUtils.cpp
@@ -36,7 +36,7 @@
                     backendTex, origin, 1, kAdopt_GrWrapOwnership);
         } else {
             proxy = context->contextPriv().proxyProvider()->wrapBackendTexture(
-                    backendTex, origin, kAdopt_GrWrapOwnership);
+                    backendTex, origin, kAdopt_GrWrapOwnership, kRW_GrIOType);
         }
 
         if (!proxy) {