diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index cf91dbe..c020158 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -453,17 +453,31 @@
     /** Creates a texture directly in the backend API without wrapping it in a GrTexture. This is
         only to be used for testing (particularly for testing the methods that import an externally
         created texture into Skia. Must be matched with a call to deleteTestingOnlyTexture(). */
-    virtual GrBackendObject createTestingOnlyBackendTexture(
+    virtual GrBackendObject createTestingOnlyBackendObject(
                                                       void* pixels, int w, int h,
                                                       GrPixelConfig config,
                                                       bool isRenderTarget = false,
                                                       GrMipMapped mipMapped = GrMipMapped::kNo) = 0;
-    /** Check a handle represents an actual texture in the backend API that has not been freed. */
-    virtual bool isTestingOnlyBackendTexture(GrBackendObject) const = 0;
     /** If ownership of the backend texture has been transferred pass true for abandonTexture. This
         will do any necessary cleanup of the handle without freeing the texture in the backend
         API. */
-    virtual void deleteTestingOnlyBackendTexture(GrBackendObject,
+    virtual void deleteTestingOnlyBackendObject(GrBackendObject,
+                                                bool abandonTexture = false) = 0;
+
+    /** Creates a texture directly in the backend API without wrapping it in a GrTexture. This is
+        only to be used for testing (particularly for testing the methods that import an externally
+        created texture into Skia. Must be matched with a call to deleteTestingOnlyTexture(). */
+    virtual GrBackendTexture createTestingOnlyBackendTexture(
+                                                      void* pixels, int w, int h,
+                                                      GrPixelConfig config,
+                                                      bool isRenderTarget,
+                                                      GrMipMapped mipMapped) = 0;
+    /** Check a handle represents an actual texture in the backend API that has not been freed. */
+    virtual bool isTestingOnlyBackendTexture(const GrBackendTexture&) const = 0;
+    /** If ownership of the backend texture has been transferred pass true for abandonTexture. This
+        will do any necessary cleanup of the handle without freeing the texture in the backend
+        API. */
+    virtual void deleteTestingOnlyBackendTexture(GrBackendTexture*,
                                                  bool abandonTexture = false) = 0;
 
     // width and height may be larger than rt (if underlying API allows it).
diff --git a/src/gpu/gl/GrGLGpu.cpp b/src/gpu/gl/GrGLGpu.cpp
index ddb80b4..c114c6c 100644
--- a/src/gpu/gl/GrGLGpu.cpp
+++ b/src/gpu/gl/GrGLGpu.cpp
@@ -4387,9 +4387,9 @@
     }
 }
 
-GrBackendObject GrGLGpu::createTestingOnlyBackendTexture(void* pixels, int w, int h,
-                                                         GrPixelConfig config, bool /*isRT*/,
-                                                         GrMipMapped mipMapped) {
+GrBackendObject GrGLGpu::createTestingOnlyBackendObject(void* pixels, int w, int h,
+                                                        GrPixelConfig config, bool /*isRT*/,
+                                                        GrMipMapped mipMapped) {
     if (!this->caps()->isConfigTexturable(config)) {
         return reinterpret_cast<GrBackendObject>(nullptr);
     }
@@ -4450,16 +4450,7 @@
     return reinterpret_cast<GrBackendObject>(info.release());
 }
 
-bool GrGLGpu::isTestingOnlyBackendTexture(GrBackendObject id) const {
-    GrGLuint texID = reinterpret_cast<const GrGLTextureInfo*>(id)->fID;
-
-    GrGLboolean result;
-    GL_CALL_RET(result, IsTexture(texID));
-
-    return (GR_GL_TRUE == result);
-}
-
-void GrGLGpu::deleteTestingOnlyBackendTexture(GrBackendObject id, bool abandonTexture) {
+void GrGLGpu::deleteTestingOnlyBackendObject(GrBackendObject id, bool abandonTexture) {
     std::unique_ptr<const GrGLTextureInfo> info(reinterpret_cast<const GrGLTextureInfo*>(id));
     GrGLuint texID = info->fID;
 
@@ -4468,6 +4459,94 @@
     }
 }
 
+GrBackendTexture GrGLGpu::createTestingOnlyBackendTexture(void* pixels, int w, int h,
+                                                          GrPixelConfig config, bool /*isRT*/,
+                                                          GrMipMapped mipMapped) {
+    if (!this->caps()->isConfigTexturable(config)) {
+        return GrBackendTexture();  // invalid
+    }
+
+    // Currently we don't support uploading pixel data when mipped.
+    if (pixels && GrMipMapped::kYes == mipMapped) {
+        return GrBackendTexture();  // invalid
+    }
+
+    GrGLTextureInfo info;
+    info.fTarget = GR_GL_TEXTURE_2D;
+    info.fID = 0;
+    GL_CALL(GenTextures(1, &info.fID));
+    GL_CALL(ActiveTexture(GR_GL_TEXTURE0));
+    GL_CALL(PixelStorei(GR_GL_UNPACK_ALIGNMENT, 1));
+    GL_CALL(BindTexture(info.fTarget, info.fID));
+    fHWBoundTextureUniqueIDs[0].makeInvalid();
+    GL_CALL(TexParameteri(info.fTarget, GR_GL_TEXTURE_MAG_FILTER, GR_GL_NEAREST));
+    GL_CALL(TexParameteri(info.fTarget, GR_GL_TEXTURE_MIN_FILTER, GR_GL_NEAREST));
+    GL_CALL(TexParameteri(info.fTarget, GR_GL_TEXTURE_WRAP_S, GR_GL_CLAMP_TO_EDGE));
+    GL_CALL(TexParameteri(info.fTarget, GR_GL_TEXTURE_WRAP_T, GR_GL_CLAMP_TO_EDGE));
+
+    GrGLenum internalFormat;
+    GrGLenum externalFormat;
+    GrGLenum externalType;
+
+    if (!this->glCaps().getTexImageFormats(config, config, &internalFormat, &externalFormat,
+                                           &externalType)) {
+        return GrBackendTexture();  // invalid
+    }
+
+    this->unbindCpuToGpuXferBuffer();
+
+    // Figure out the number of mip levels.
+    int mipLevels = 1;
+    if (GrMipMapped::kYes == mipMapped) {
+        mipLevels = SkMipMap::ComputeLevelCount(w, h) + 1;
+    }
+
+    size_t bpp = GrBytesPerPixel(config);
+    size_t baseLayerSize = bpp * w * h;
+    SkAutoMalloc defaultStorage(baseLayerSize);
+    if (!pixels) {
+        // Fill in the texture with all zeros so we don't have random garbage
+        pixels = defaultStorage.get();
+        memset(pixels, 0, baseLayerSize);
+    }
+
+    int width = w;
+    int height = h;
+    for (int i = 0; i < mipLevels; ++i) {
+        GL_CALL(TexImage2D(info.fTarget, i, internalFormat, width, height, 0, externalFormat,
+                           externalType, pixels));
+        width = SkTMax(1, width / 2);
+        height = SkTMax(1, height / 2);
+    }
+
+    return GrBackendTexture(w, h, config, mipMapped, info);
+}
+
+bool GrGLGpu::isTestingOnlyBackendTexture(const GrBackendTexture& tex) const {
+    SkASSERT(kOpenGL_GrBackend == tex.backend());
+
+    const GrGLTextureInfo* info = tex.getGLTextureInfo();
+    if (!info) {
+        return false;
+    }
+
+    GrGLboolean result;
+    GL_CALL_RET(result, IsTexture(info->fID));
+
+    return (GR_GL_TRUE == result);
+}
+
+void GrGLGpu::deleteTestingOnlyBackendTexture(GrBackendTexture* tex, bool abandonTexture) {
+    SkASSERT(kOpenGL_GrBackend == tex->backend());
+
+    const GrGLTextureInfo* info = tex->getGLTextureInfo();
+    if (info && !abandonTexture) {
+        GrGLuint texID = info->fID;
+
+        GL_CALL(DeleteTextures(1, &texID));
+    }
+}
+
 void GrGLGpu::resetShaderCacheForTesting() const {
     fProgramCache->abandon();
 }
diff --git a/src/gpu/gl/GrGLGpu.h b/src/gpu/gl/GrGLGpu.h
index 3d9533d..42897ab 100644
--- a/src/gpu/gl/GrGLGpu.h
+++ b/src/gpu/gl/GrGLGpu.h
@@ -161,12 +161,18 @@
                                                                 int width,
                                                                 int height) override;
 
-    GrBackendObject createTestingOnlyBackendTexture(void* pixels, int w, int h,
-                                                    GrPixelConfig config,
-                                                    bool isRenderTarget,
-                                                    GrMipMapped mipMapped) override;
-    bool isTestingOnlyBackendTexture(GrBackendObject) const override;
-    void deleteTestingOnlyBackendTexture(GrBackendObject, bool abandonTexture) override;
+    GrBackendObject createTestingOnlyBackendObject(void* pixels, int w, int h,
+                                                   GrPixelConfig config,
+                                                   bool isRenderTarget,
+                                                   GrMipMapped mipMapped) override;
+    void deleteTestingOnlyBackendObject(GrBackendObject, bool abandonTexture) override;
+
+    GrBackendTexture createTestingOnlyBackendTexture(void* pixels, int w, int h,
+                                                     GrPixelConfig config,
+                                                     bool isRenderTarget,
+                                                     GrMipMapped mipMapped) override;
+    bool isTestingOnlyBackendTexture(const GrBackendTexture&) const override;
+    void deleteTestingOnlyBackendTexture(GrBackendTexture*, bool abandonTexture = false) override;
 
     void resetShaderCacheForTesting() const override;
 
diff --git a/src/gpu/mock/GrMockGpu.cpp b/src/gpu/mock/GrMockGpu.cpp
index 5969f2f..4080019 100644
--- a/src/gpu/mock/GrMockGpu.cpp
+++ b/src/gpu/mock/GrMockGpu.cpp
@@ -90,22 +90,46 @@
     return new GrMockStencilAttachment(this, width, height, kBits, rt->numColorSamples());
 }
 
-GrBackendObject GrMockGpu::createTestingOnlyBackendTexture(void* pixels, int w, int h,
-                                                           GrPixelConfig config, bool isRT,
-                                                           GrMipMapped) {
+GrBackendObject GrMockGpu::createTestingOnlyBackendObject(void* pixels, int w, int h,
+                                                          GrPixelConfig config, bool isRT,
+                                                          GrMipMapped) {
     auto info = new GrMockTextureInfo;
     info->fID = NextExternalTextureID();
     fOutstandingTestingOnlyTextureIDs.add(info->fID);
     return reinterpret_cast<GrBackendObject>(info);
 }
 
-bool GrMockGpu::isTestingOnlyBackendTexture(GrBackendObject object) const {
-    return fOutstandingTestingOnlyTextureIDs.contains(
-            reinterpret_cast<const GrMockTextureInfo*>(object)->fID);
-}
-
-void GrMockGpu::deleteTestingOnlyBackendTexture(GrBackendObject object, bool abandonTexture) {
+void GrMockGpu::deleteTestingOnlyBackendObject(GrBackendObject object, bool abandonTexture) {
     auto info = reinterpret_cast<const GrMockTextureInfo*>(object);
     fOutstandingTestingOnlyTextureIDs.remove(info->fID);
     delete info;
 }
+
+GrBackendTexture GrMockGpu::createTestingOnlyBackendTexture(void* pixels, int w, int h,
+                                                            GrPixelConfig config, bool isRT,
+                                                            GrMipMapped) {
+    GrMockTextureInfo info;
+    info.fID = NextExternalTextureID();
+    fOutstandingTestingOnlyTextureIDs.add(info.fID);
+    return GrBackendTexture(w, h, config, info);
+}
+
+bool GrMockGpu::isTestingOnlyBackendTexture(const GrBackendTexture& tex) const {
+    SkASSERT(kMock_GrBackend == tex.backend());
+
+    const GrMockTextureInfo* info = tex.getMockTextureInfo();
+    if (!info) {
+        return false;
+    }
+
+    return fOutstandingTestingOnlyTextureIDs.contains(info->fID);
+}
+
+void GrMockGpu::deleteTestingOnlyBackendTexture(GrBackendTexture* tex, bool abandonTexture) {
+    SkASSERT(kMock_GrBackend == tex->backend());
+
+    const GrMockTextureInfo* info = tex->getMockTextureInfo();
+    if (info) {
+        fOutstandingTestingOnlyTextureIDs.remove(info->fID);
+    }
+}
diff --git a/src/gpu/mock/GrMockGpu.h b/src/gpu/mock/GrMockGpu.h
index 2a86a4e..aaa465b 100644
--- a/src/gpu/mock/GrMockGpu.h
+++ b/src/gpu/mock/GrMockGpu.h
@@ -129,12 +129,14 @@
                                                                 int height) override;
     void clearStencil(GrRenderTarget*, int clearValue) override  {}
 
-    GrBackendObject createTestingOnlyBackendTexture(void* pixels, int w, int h, GrPixelConfig,
+    GrBackendObject createTestingOnlyBackendObject(void* pixels, int w, int h, GrPixelConfig,
+                                                   bool isRT, GrMipMapped) override;
+    void deleteTestingOnlyBackendObject(GrBackendObject, bool abandonTexture) override;
+
+    GrBackendTexture createTestingOnlyBackendTexture(void* pixels, int w, int h, GrPixelConfig,
                                                     bool isRT, GrMipMapped) override;
-
-    bool isTestingOnlyBackendTexture(GrBackendObject) const override;
-
-    void deleteTestingOnlyBackendTexture(GrBackendObject, bool abandonTexture) override;
+    bool isTestingOnlyBackendTexture(const GrBackendTexture&) const override;
+    void deleteTestingOnlyBackendTexture(GrBackendTexture*, bool abandonTexture = false) override;
 
     static int NextInternalTextureID();
     static int NextExternalTextureID();
diff --git a/src/gpu/mtl/GrMtlGpu.h b/src/gpu/mtl/GrMtlGpu.h
index 4dde825..6d30d1b 100644
--- a/src/gpu/mtl/GrMtlGpu.h
+++ b/src/gpu/mtl/GrMtlGpu.h
@@ -141,13 +141,20 @@
 
     void clearStencil(GrRenderTarget* target, int clearValue) override  {}
 
-    GrBackendObject createTestingOnlyBackendTexture(void* pixels, int w, int h,
-                                                    GrPixelConfig config, bool isRT,
-                                                    GrMipMapped) override {
+    GrBackendObject createTestingOnlyBackendObject(void* pixels, int w, int h,
+                                                   GrPixelConfig config, bool isRT,
+                                                   GrMipMapped) override {
         return 0;
     }
-    bool isTestingOnlyBackendTexture(GrBackendObject ) const override { return false; }
-    void deleteTestingOnlyBackendTexture(GrBackendObject, bool abandonTexture) override {}
+    void deleteTestingOnlyBackendObject(GrBackendObject, bool abandonTexture = false) override {}
+
+    GrBackendTexture createTestingOnlyBackendTexture(void* pixels, int w, int h,
+                                                     GrPixelConfig config, bool isRT,
+                                                     GrMipMapped) override {
+        return GrBackendTexture();
+    }
+    bool isTestingOnlyBackendTexture(const GrBackendTexture&) const override { return false; }
+    void deleteTestingOnlyBackendTexture(GrBackendTexture*, bool abandon = false) override {}
 
     sk_sp<GrMtlCaps> fMtlCaps;
 
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index 0a64234..85ddd08 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -1173,10 +1173,10 @@
     return true;
 }
 
-GrBackendObject GrVkGpu::createTestingOnlyBackendTexture(void* srcData, int w, int h,
-                                                         GrPixelConfig config,
-                                                         bool isRenderTarget,
-                                                         GrMipMapped mipMapped) {
+GrBackendObject GrVkGpu::createTestingOnlyBackendObject(void* srcData, int w, int h,
+                                                        GrPixelConfig config,
+                                                        bool isRenderTarget,
+                                                        GrMipMapped mipMapped) {
 
     VkFormat pixelFormat;
     if (!GrPixelConfigToVkFormat(config, &pixelFormat)) {
@@ -1508,8 +1508,357 @@
     return (GrBackendObject)info;
 }
 
-bool GrVkGpu::isTestingOnlyBackendTexture(GrBackendObject id) const {
-    const GrVkImageInfo* backend = reinterpret_cast<const GrVkImageInfo*>(id);
+void GrVkGpu::deleteTestingOnlyBackendObject(GrBackendObject id, bool abandon) {
+    GrVkImageInfo* backend = reinterpret_cast<GrVkImageInfo*>(id);
+    if (backend) {
+        if (!abandon) {
+            // something in the command buffer may still be using this, so force submit
+            this->submitCommandBuffer(kForce_SyncQueue);
+            GrVkImage::DestroyImageInfo(this, backend);
+        }
+        delete backend;
+    }
+}
+
+GrBackendTexture GrVkGpu::createTestingOnlyBackendTexture(void* srcData, int w, int h,
+                                                          GrPixelConfig config,
+                                                          bool isRenderTarget,
+                                                          GrMipMapped mipMapped) {
+
+    VkFormat pixelFormat;
+    if (!GrPixelConfigToVkFormat(config, &pixelFormat)) {
+        return GrBackendTexture(); // invalid
+    }
+
+    bool linearTiling = false;
+    if (!fVkCaps->isConfigTexturable(config)) {
+        return GrBackendTexture(); // invalid
+    }
+
+    if (isRenderTarget && !fVkCaps->isConfigRenderable(config, false)) {
+        return GrBackendTexture(); // invalid
+    }
+
+    // Currently we don't support uploading pixel data when mipped.
+    if (srcData && GrMipMapped::kYes == mipMapped) {
+        return GrBackendTexture(); // invalid
+    }
+
+    if (fVkCaps->isConfigTexturableLinearly(config) &&
+        (!isRenderTarget || fVkCaps->isConfigRenderableLinearly(config, false)) &&
+        GrMipMapped::kNo == mipMapped) {
+        linearTiling = true;
+    }
+
+    VkImageUsageFlags usageFlags = VK_IMAGE_USAGE_SAMPLED_BIT;
+    usageFlags |= VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
+    usageFlags |= VK_IMAGE_USAGE_TRANSFER_DST_BIT;
+    if (isRenderTarget) {
+        usageFlags |= VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
+    }
+
+    VkImage image = VK_NULL_HANDLE;
+    GrVkAlloc alloc = { VK_NULL_HANDLE, 0, 0, 0 };
+
+    VkImageTiling imageTiling = linearTiling ? VK_IMAGE_TILING_LINEAR : VK_IMAGE_TILING_OPTIMAL;
+    VkImageLayout initialLayout = (VK_IMAGE_TILING_LINEAR == imageTiling)
+                                ? VK_IMAGE_LAYOUT_PREINITIALIZED
+                                : VK_IMAGE_LAYOUT_UNDEFINED;
+
+    // Create Image
+    VkSampleCountFlagBits vkSamples;
+    if (!GrSampleCountToVkSampleCount(1, &vkSamples)) {
+        return GrBackendTexture(); // invalid
+    }
+
+    // Figure out the number of mip levels.
+    uint32_t mipLevels = 1;
+    if (GrMipMapped::kYes == mipMapped) {
+        mipLevels = SkMipMap::ComputeLevelCount(w, h) + 1;
+    }
+
+    const VkImageCreateInfo imageCreateInfo = {
+        VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,         // sType
+        nullptr,                                     // pNext
+        0,                                           // VkImageCreateFlags
+        VK_IMAGE_TYPE_2D,                            // VkImageType
+        pixelFormat,                                 // VkFormat
+        { (uint32_t) w, (uint32_t) h, 1 },           // VkExtent3D
+        mipLevels,                                   // mipLevels
+        1,                                           // arrayLayers
+        vkSamples,                                   // samples
+        imageTiling,                                 // VkImageTiling
+        usageFlags,                                  // VkImageUsageFlags
+        VK_SHARING_MODE_EXCLUSIVE,                   // VkSharingMode
+        0,                                           // queueFamilyCount
+        0,                                           // pQueueFamilyIndices
+        initialLayout                                // initialLayout
+    };
+
+    GR_VK_CALL_ERRCHECK(this->vkInterface(), CreateImage(this->device(), &imageCreateInfo, nullptr, &image));
+
+    if (!GrVkMemory::AllocAndBindImageMemory(this, image, linearTiling, &alloc)) {
+        VK_CALL(DestroyImage(this->device(), image, nullptr));
+        return GrBackendTexture(); // invalid
+    }
+
+    // We need to declare these early so that we can delete them at the end outside of the if block.
+    GrVkAlloc bufferAlloc = { VK_NULL_HANDLE, 0, 0, 0 };
+    VkBuffer buffer = VK_NULL_HANDLE;
+
+    VkResult err;
+    const VkCommandBufferAllocateInfo cmdInfo = {
+        VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,   // sType
+        nullptr,                                          // pNext
+        fCmdPool,                                         // commandPool
+        VK_COMMAND_BUFFER_LEVEL_PRIMARY,                  // level
+        1                                                 // bufferCount
+    };
+
+    VkCommandBuffer cmdBuffer;
+    err = VK_CALL(AllocateCommandBuffers(fDevice, &cmdInfo, &cmdBuffer));
+    if (err) {
+        GrVkMemory::FreeImageMemory(this, false, alloc);
+        VK_CALL(DestroyImage(fDevice, image, nullptr));
+        return GrBackendTexture(); // invalid
+    }
+
+    VkCommandBufferBeginInfo cmdBufferBeginInfo;
+    memset(&cmdBufferBeginInfo, 0, sizeof(VkCommandBufferBeginInfo));
+    cmdBufferBeginInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
+    cmdBufferBeginInfo.pNext = nullptr;
+    cmdBufferBeginInfo.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
+    cmdBufferBeginInfo.pInheritanceInfo = nullptr;
+
+    err = VK_CALL(BeginCommandBuffer(cmdBuffer, &cmdBufferBeginInfo));
+    SkASSERT(!err);
+
+    size_t bpp = GrBytesPerPixel(config);
+    size_t rowCopyBytes = bpp * w;
+    if (linearTiling) {
+        const VkImageSubresource subres = {
+            VK_IMAGE_ASPECT_COLOR_BIT,
+            0,  // mipLevel
+            0,  // arraySlice
+        };
+        VkSubresourceLayout layout;
+
+        VK_CALL(GetImageSubresourceLayout(fDevice, image, &subres, &layout));
+
+        if (!copy_testing_data(this, srcData, alloc, 0, rowCopyBytes,
+                               static_cast<size_t>(layout.rowPitch), h)) {
+            GrVkMemory::FreeImageMemory(this, true, alloc);
+            VK_CALL(DestroyImage(fDevice, image, nullptr));
+            VK_CALL(EndCommandBuffer(cmdBuffer));
+            VK_CALL(FreeCommandBuffers(fDevice, fCmdPool, 1, &cmdBuffer));
+            return GrBackendTexture(); // invalid
+        }
+    } else {
+        SkASSERT(w && h);
+
+        SkTArray<size_t> individualMipOffsets(mipLevels);
+        individualMipOffsets.push_back(0);
+        size_t combinedBufferSize = w * bpp * h;
+        int currentWidth = w;
+        int currentHeight = h;
+        // The alignment must be at least 4 bytes and a multiple of the bytes per pixel of the image
+        // config. This works with the assumption that the bytes in pixel config is always a power
+        // of 2.
+        SkASSERT((bpp & (bpp - 1)) == 0);
+        const size_t alignmentMask = 0x3 | (bpp - 1);
+        for (uint32_t currentMipLevel = 1; currentMipLevel < mipLevels; currentMipLevel++) {
+            currentWidth = SkTMax(1, currentWidth/2);
+            currentHeight = SkTMax(1, currentHeight/2);
+
+            const size_t trimmedSize = currentWidth * bpp * currentHeight;
+            const size_t alignmentDiff = combinedBufferSize & alignmentMask;
+            if (alignmentDiff != 0) {
+                combinedBufferSize += alignmentMask - alignmentDiff + 1;
+            }
+            individualMipOffsets.push_back(combinedBufferSize);
+            combinedBufferSize += trimmedSize;
+        }
+
+        VkBufferCreateInfo bufInfo;
+        memset(&bufInfo, 0, sizeof(VkBufferCreateInfo));
+        bufInfo.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
+        bufInfo.flags = 0;
+        bufInfo.size = combinedBufferSize;
+        bufInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
+        bufInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
+        bufInfo.queueFamilyIndexCount = 0;
+        bufInfo.pQueueFamilyIndices = nullptr;
+        err = VK_CALL(CreateBuffer(fDevice, &bufInfo, nullptr, &buffer));
+
+        if (err) {
+            GrVkMemory::FreeImageMemory(this, false, alloc);
+            VK_CALL(DestroyImage(fDevice, image, nullptr));
+            VK_CALL(EndCommandBuffer(cmdBuffer));
+            VK_CALL(FreeCommandBuffers(fDevice, fCmdPool, 1, &cmdBuffer));
+            return GrBackendTexture(); // invalid
+        }
+
+        if (!GrVkMemory::AllocAndBindBufferMemory(this, buffer, GrVkBuffer::kCopyRead_Type,
+                                                  true, &bufferAlloc)) {
+            GrVkMemory::FreeImageMemory(this, false, alloc);
+            VK_CALL(DestroyImage(fDevice, image, nullptr));
+            VK_CALL(DestroyBuffer(fDevice, buffer, nullptr));
+            VK_CALL(EndCommandBuffer(cmdBuffer));
+            VK_CALL(FreeCommandBuffers(fDevice, fCmdPool, 1, &cmdBuffer));
+            return GrBackendTexture(); // invalid
+        }
+
+        currentWidth = w;
+        currentHeight = h;
+        for (uint32_t currentMipLevel = 0; currentMipLevel < mipLevels; currentMipLevel++) {
+            SkASSERT(0 == currentMipLevel || !srcData);
+            size_t currentRowBytes = bpp * currentWidth;
+            size_t bufferOffset = individualMipOffsets[currentMipLevel];
+            if (!copy_testing_data(this, srcData, bufferAlloc, bufferOffset,
+                                   currentRowBytes, currentRowBytes, currentHeight)) {
+                GrVkMemory::FreeImageMemory(this, false, alloc);
+                VK_CALL(DestroyImage(fDevice, image, nullptr));
+                GrVkMemory::FreeBufferMemory(this, GrVkBuffer::kCopyRead_Type, bufferAlloc);
+                VK_CALL(DestroyBuffer(fDevice, buffer, nullptr));
+                VK_CALL(EndCommandBuffer(cmdBuffer));
+                VK_CALL(FreeCommandBuffers(fDevice, fCmdPool, 1, &cmdBuffer));
+                return GrBackendTexture(); // invalid
+            }
+            currentWidth = SkTMax(1, currentWidth/2);
+            currentHeight = SkTMax(1, currentHeight/2);
+        }
+
+        // Set image layout and add barrier
+        VkImageMemoryBarrier barrier;
+        memset(&barrier, 0, sizeof(VkImageMemoryBarrier));
+        barrier.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
+        barrier.pNext = nullptr;
+        barrier.srcAccessMask = GrVkMemory::LayoutToSrcAccessMask(initialLayout);
+        barrier.dstAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
+        barrier.oldLayout = initialLayout;
+        barrier.newLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
+        barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
+        barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
+        barrier.image = image;
+        barrier.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, mipLevels, 0 , 1};
+
+        VK_CALL(CmdPipelineBarrier(cmdBuffer,
+                                   GrVkMemory::LayoutToPipelineStageFlags(initialLayout),
+                                   VK_PIPELINE_STAGE_TRANSFER_BIT,
+                                   0,
+                                   0, nullptr,
+                                   0, nullptr,
+                                   1, &barrier));
+        initialLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
+
+        SkTArray<VkBufferImageCopy> regions(mipLevels);
+
+        currentWidth = w;
+        currentHeight = h;
+        for (uint32_t currentMipLevel = 0; currentMipLevel < mipLevels; currentMipLevel++) {
+            // Submit copy command
+            VkBufferImageCopy& region = regions.push_back();
+            memset(&region, 0, sizeof(VkBufferImageCopy));
+            region.bufferOffset = individualMipOffsets[currentMipLevel];
+            region.bufferRowLength = currentWidth;
+            region.bufferImageHeight = currentHeight;
+            region.imageSubresource = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 0, 1 };
+            region.imageOffset = { 0, 0, 0 };
+            region.imageExtent = { (uint32_t)currentWidth, (uint32_t)currentHeight, 1 };
+            currentWidth = SkTMax(1, currentWidth/2);
+            currentHeight = SkTMax(1, currentHeight/2);
+        }
+
+        VK_CALL(CmdCopyBufferToImage(cmdBuffer, buffer, image, initialLayout, regions.count(),
+                                     regions.begin()));
+    }
+    // Change Image layout to shader read since if we use this texture as a borrowed textures within
+    // Ganesh we require that its layout be set to that
+    VkImageMemoryBarrier barrier;
+    memset(&barrier, 0, sizeof(VkImageMemoryBarrier));
+    barrier.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
+    barrier.pNext = nullptr;
+    barrier.srcAccessMask = GrVkMemory::LayoutToSrcAccessMask(initialLayout);
+    barrier.dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
+    barrier.oldLayout = initialLayout;
+    barrier.newLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
+    barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
+    barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
+    barrier.image = image;
+    barrier.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, mipLevels, 0 , 1};
+
+    VK_CALL(CmdPipelineBarrier(cmdBuffer,
+                               GrVkMemory::LayoutToPipelineStageFlags(initialLayout),
+                               VK_PIPELINE_STAGE_ALL_GRAPHICS_BIT,
+                               0,
+                               0, nullptr,
+                               0, nullptr,
+                               1, &barrier));
+
+    // End CommandBuffer
+    err = VK_CALL(EndCommandBuffer(cmdBuffer));
+    SkASSERT(!err);
+
+    // Create Fence for queue
+    VkFence fence;
+    VkFenceCreateInfo fenceInfo;
+    memset(&fenceInfo, 0, sizeof(VkFenceCreateInfo));
+    fenceInfo.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
+
+    err = VK_CALL(CreateFence(fDevice, &fenceInfo, nullptr, &fence));
+    SkASSERT(!err);
+
+    VkSubmitInfo submitInfo;
+    memset(&submitInfo, 0, sizeof(VkSubmitInfo));
+    submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
+    submitInfo.pNext = nullptr;
+    submitInfo.waitSemaphoreCount = 0;
+    submitInfo.pWaitSemaphores = nullptr;
+    submitInfo.pWaitDstStageMask = 0;
+    submitInfo.commandBufferCount = 1;
+    submitInfo.pCommandBuffers = &cmdBuffer;
+    submitInfo.signalSemaphoreCount = 0;
+    submitInfo.pSignalSemaphores = nullptr;
+    err = VK_CALL(QueueSubmit(this->queue(), 1, &submitInfo, fence));
+    SkASSERT(!err);
+
+    err = VK_CALL(WaitForFences(fDevice, 1, &fence, true, UINT64_MAX));
+    if (VK_TIMEOUT == err) {
+        GrVkMemory::FreeImageMemory(this, false, alloc);
+        VK_CALL(DestroyImage(fDevice, image, nullptr));
+        GrVkMemory::FreeBufferMemory(this, GrVkBuffer::kCopyRead_Type, bufferAlloc);
+        VK_CALL(DestroyBuffer(fDevice, buffer, nullptr));
+        VK_CALL(FreeCommandBuffers(fDevice, fCmdPool, 1, &cmdBuffer));
+        VK_CALL(DestroyFence(fDevice, fence, nullptr));
+        SkDebugf("Fence failed to signal: %d\n", err);
+        SK_ABORT("failing");
+    }
+    SkASSERT(!err);
+
+    // Clean up transfer resources
+    if (buffer != VK_NULL_HANDLE) { // workaround for an older NVidia driver crash
+        GrVkMemory::FreeBufferMemory(this, GrVkBuffer::kCopyRead_Type, bufferAlloc);
+        VK_CALL(DestroyBuffer(fDevice, buffer, nullptr));
+    }
+    VK_CALL(FreeCommandBuffers(fDevice, fCmdPool, 1, &cmdBuffer));
+    VK_CALL(DestroyFence(fDevice, fence, nullptr));
+
+
+    GrVkImageInfo info;
+    info.fImage = image;
+    info.fAlloc = alloc;
+    info.fImageTiling = imageTiling;
+    info.fImageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
+    info.fFormat = pixelFormat;
+    info.fLevelCount = mipLevels;
+
+    return GrBackendTexture(w, h, info);
+}
+
+bool GrVkGpu::isTestingOnlyBackendTexture(const GrBackendTexture& tex) const {
+    SkASSERT(kVulkan_GrBackend == tex.fBackend);
+
+    const GrVkImageInfo* backend = tex.getVkImageInfo();
 
     if (backend && backend->fImage && backend->fAlloc.fMemory) {
         VkMemoryRequirements req;
@@ -1525,15 +1874,15 @@
     return false;
 }
 
-void GrVkGpu::deleteTestingOnlyBackendTexture(GrBackendObject id, bool abandon) {
-    GrVkImageInfo* backend = reinterpret_cast<GrVkImageInfo*>(id);
-    if (backend) {
-        if (!abandon) {
-            // something in the command buffer may still be using this, so force submit
-            this->submitCommandBuffer(kForce_SyncQueue);
-            GrVkImage::DestroyImageInfo(this, backend);
-        }
-        delete backend;
+void GrVkGpu::deleteTestingOnlyBackendTexture(GrBackendTexture* tex, bool abandon) {
+    SkASSERT(kVulkan_GrBackend == tex->fBackend);
+
+    const GrVkImageInfo* info = tex->getVkImageInfo();
+
+    if (info && !abandon) {
+        // something in the command buffer may still be using this, so force submit
+        this->submitCommandBuffer(kForce_SyncQueue);
+        GrVkImage::DestroyImageInfo(this, const_cast<GrVkImageInfo*>(info));
     }
 }
 
diff --git a/src/gpu/vk/GrVkGpu.h b/src/gpu/vk/GrVkGpu.h
index 75c7cb8..dd45ed1 100644
--- a/src/gpu/vk/GrVkGpu.h
+++ b/src/gpu/vk/GrVkGpu.h
@@ -85,12 +85,18 @@
 
     void xferBarrier(GrRenderTarget*, GrXferBarrierType) override {}
 
-    GrBackendObject createTestingOnlyBackendTexture(void* pixels, int w, int h,
-                                                    GrPixelConfig config,
-                                                    bool isRenderTarget,
-                                                    GrMipMapped) override;
-    bool isTestingOnlyBackendTexture(GrBackendObject id) const override;
-    void deleteTestingOnlyBackendTexture(GrBackendObject id, bool abandonTexture) override;
+    GrBackendObject createTestingOnlyBackendObject(void* pixels, int w, int h,
+                                                   GrPixelConfig config,
+                                                   bool isRenderTarget,
+                                                   GrMipMapped) override;
+    void deleteTestingOnlyBackendObject(GrBackendObject id, bool abandonTexture) override;
+
+    GrBackendTexture createTestingOnlyBackendTexture(void* pixels, int w, int h,
+                                                     GrPixelConfig config,
+                                                     bool isRenderTarget,
+                                                     GrMipMapped) override;
+    bool isTestingOnlyBackendTexture(const GrBackendTexture&) const override;
+    void deleteTestingOnlyBackendTexture(GrBackendTexture*, bool abandonTexture = false) override;
 
     GrStencilAttachment* createStencilAttachmentForRenderTarget(const GrRenderTarget*,
                                                                 int width,