Set up cache in vulkan to reuse GrVkPrograms (aka VkPipelines)

src/gpu/vk/GrVkRenderPass.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 GrVkRenderPass_DEFINED
 #define GrVkRenderPass_DEFINED
 
 #include "GrTypes.h"
 
 #include "GrVkResource.h"
 
 #include "vulkan/vulkan.h"
 
+class GrProcessorKeyBuilder;
 class GrVkGpu;
 class GrVkRenderTarget;
 
 class GrVkRenderPass : public GrVkResource {
 public:
     GrVkRenderPass() : INHERITED(), fRenderPass(VK_NULL_HANDLE) {}
     void initSimple(const GrVkGpu* gpu, const GrVkRenderTarget& target);
 
     struct AttachmentsDescriptor {
         struct AttachmentDesc {
@@ skipping 38 matching lines @@
                       VkSubpassContents* contents) const;
 
     // Returns whether or not the structure of a RenderTarget matches that of the VkRenderPass in
     // this object. Specifically this compares that the number of attachments, format of
     // attachments, and sample counts are all the same. This function is used in the creation of
     // basic RenderPasses that can be used when creating a VkFrameBuffer object.
     bool isCompatible(const GrVkRenderTarget& target) const;
 
     VkRenderPass vkRenderPass() const { return fRenderPass; }
 
+    void genKey(GrProcessorKeyBuilder* b) const;
+
 private:
     GrVkRenderPass(const GrVkRenderPass&);
     GrVkRenderPass& operator=(const GrVkRenderPass&);
 
     void freeGPUData(const GrVkGpu* gpu) const override;
 
     VkRenderPass          fRenderPass;
     AttachmentFlags       fAttachmentFlags;
     AttachmentsDescriptor fAttachmentsDescriptor;
 
     typedef GrVkResource INHERITED;
 };
 
 GR_MAKE_BITFIELD_OPS(GrVkRenderPass::AttachmentFlags);
 
 #endif