Refactor creation of GrVkRenderPasses to make them move general

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 "vk/GrVkDefines.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 {
             VkFormat fFormat;
             int fSamples;
-            AttachmentDesc() : fFormat(VK_FORMAT_UNDEFINED), fSamples(0) {}
+            VkAttachmentLoadOp fLoadOp;
+            VkAttachmentStoreOp fStoreOp;
+
+            AttachmentDesc()
+                : fFormat(VK_FORMAT_UNDEFINED)
+                , fSamples(0)
+                , fLoadOp(VK_ATTACHMENT_LOAD_OP_LOAD)
+                , fStoreOp(VK_ATTACHMENT_STORE_OP_STORE) {}
             bool operator==(const AttachmentDesc& right) const {
-                return (fFormat == right.fFormat && fSamples == right.fSamples);
+                return (fFormat == right.fFormat &&
+                        fSamples == right.fSamples &&
+                        fLoadOp == right.fLoadOp &&
+                        fStoreOp == right.fStoreOp);
             }
             bool operator!=(const AttachmentDesc& right) const {
                 return !(*this == right);
             }
+            bool isCompatible(const AttachmentDesc& desc) const {
+                return (fFormat == desc.fFormat && fSamples == desc.fSamples);
+            }
         };
         AttachmentDesc fColor;
         AttachmentDesc fResolve;
         AttachmentDesc fStencil;
         uint32_t       fAttachmentCount;
     };
 
     enum AttachmentFlags {
         kColor_AttachmentFlag = 0x1,
         kResolve_AttachmentFlag = 0x2,
@@ skipping 23 matching lines @@
     // 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