Add automatic generation of mipmaps to Vulkan

src/gpu/vk/GrVkCommandBuffer.h

 /*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #ifndef GrVkCommandBuffer_DEFINED
 #define GrVkCommandBuffer_DEFINED
 
@@ skipping 109 matching lines @@
 
     void copyImage(const GrVkGpu* gpu,
                    GrVkImage* srcImage,
                    VkImageLayout srcLayout,
                    GrVkImage* dstImage,
                    VkImageLayout dstLayout,
                    uint32_t copyRegionCount,
                    const VkImageCopy* copyRegions);
 
     void blitImage(const GrVkGpu* gpu,
-                   GrVkImage* srcImage,
+                   const GrVkImage::Resource* srcImage,
                    VkImageLayout srcLayout,
-                   GrVkImage* dstImage,
+                   const GrVkImage::Resource* dstImage,
                    VkImageLayout dstLayout,
                    uint32_t blitRegionCount,
                    const VkImageBlit* blitRegions,
                    VkFilter filter);
 
     void copyImageToBuffer(const GrVkGpu* gpu,
                            GrVkImage* srcImage,
                            VkImageLayout srcLayout,
                            GrVkTransferBuffer* dstBuffer,
                            uint32_t copyRegionCount,
@@ skipping 71 matching lines @@
     const GrVkRenderPass*     fActiveRenderPass;
 
     // Cached values used for dynamic state updates
     VkViewport fCachedViewport;
     VkRect2D   fCachedScissor;
     float      fCachedBlendConstant[4];
 };
 
 
 #endif