Update RT views and framebuffer in vulkan after mipmaping

src/gpu/vk/GrVkTexture.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrVkTexture.h"
 #include "GrVkGpu.h"
 #include "GrVkImageView.h"
 #include "GrTexturePriv.h"
+#include "GrVkTextureRenderTarget.h"
 #include "GrVkUtil.h"
 
 #include "vk/GrVkTypes.h"
 
 #define VK_CALL(GPU, X) GR_VK_CALL(GPU->vkInterface(), X)
 
 // Because this class is virtually derived from GrSurface we must explicitly call its constructor.
 GrVkTexture::GrVkTexture(GrVkGpu* gpu,
                          SkBudgeted budgeted,
                          const GrSurfaceDesc& desc,
@@ skipping 132 matching lines @@
     if (!fLinearTextureView) {
         fLinearTextureView = GrVkImageView::Create(this->getVkGpu(), fInfo.fImage,
                                                    linearFormat, GrVkImageView::kColor_Type,
                                                    fInfo.fLevelCount);
         SkASSERT(fLinearTextureView);
     }
 
     return fLinearTextureView;
 }
 
-bool GrVkTexture::reallocForMipmap(const GrVkGpu* gpu, uint32_t mipLevels) {
+bool GrVkTexture::reallocForMipmap(GrVkGpu* gpu, uint32_t mipLevels) {
     if (mipLevels == 1) {
         // don't need to do anything for a 1x1 texture
         return false;
     }
 
     const GrVkResource* oldResource = this->resource();
 
     // We shouldn't realloc something that doesn't belong to us
     if (fIsBorrowed) {
         return false;
     }
 
-    // Does this even make sense for rendertargets?
     bool renderTarget = SkToBool(fDesc.fFlags & kRenderTarget_GrSurfaceFlag);
 
     VkImageUsageFlags usageFlags = VK_IMAGE_USAGE_SAMPLED_BIT;
     if (renderTarget) {
         usageFlags |= VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
     }
     usageFlags |= VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;
 
     GrVkImage::ImageDesc imageDesc;
     imageDesc.fImageType = VK_IMAGE_TYPE_2D;
@@ skipping 14 matching lines @@
     // have to create a new image view for new resource
     const GrVkImageView* oldView = fTextureView;
     VkImage image = info.fImage;
     const GrVkImageView* textureView = GrVkImageView::Create(gpu, image, info.fFormat,
                                                              GrVkImageView::kColor_Type, mipLevels);
     if (!textureView) {
         GrVkImage::DestroyImageInfo(gpu, &info);
         return false;
     }
 
+    if (renderTarget) {
+        GrVkTextureRenderTarget* texRT = static_cast<GrVkTextureRenderTarget*>(this);
+        if (!texRT->updateForMipmap(gpu, info)) {
+            GrVkImage::DestroyImageInfo(gpu, &info);
+            return false;
+        }
+    }
+
     oldResource->unref(gpu);
     oldView->unref(gpu);
     if (fLinearTextureView) {
         fLinearTextureView->unref(gpu);
         fLinearTextureView = nullptr;
     }
 
     this->setNewResource(info.fImage, info.fAlloc, info.fImageTiling);
     fTextureView = textureView;
     fInfo = info;
     this->texturePriv().setMaxMipMapLevel(mipLevels);
 
     return true;
 }