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* Copyright 2016 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef VulkanWindowContext_DEFINED
#define VulkanWindowContext_DEFINED
#include "SkTypes.h" // required to pull in any SkUserConfig defines
#ifdef SK_VULKAN
#include "vk/GrVkBackendContext.h"
#include "WindowContext.h"
class GrRenderTarget;
namespace sk_app {
class VulkanWindowContext : public WindowContext {
~VulkanWindowContext() override;
sk_sp<SkSurface> getBackbufferSurface() override;
void swapBuffers() override;
bool isValid() override { return SkToBool(fBackendContext.get()); }
void resize(int w, int h) override {
this->createSwapchain(w, h, fDisplayParams);
void setDisplayParams(const DisplayParams& params) override {
fDisplayParams = params;
/** Platform specific function that creates a VkSurfaceKHR for a window */
using CreateVkSurfaceFn = std::function<VkSurfaceKHR(VkInstance)>;
/** Platform specific function that determines whether presentation will succeed. */
using CanPresentFn = GrVkBackendContext::CanPresentFn;
VulkanWindowContext(const DisplayParams&, CreateVkSurfaceFn, CanPresentFn,
PFN_vkGetInstanceProcAddr, PFN_vkGetDeviceProcAddr);
void initializeContext();
void destroyContext();
struct BackbufferInfo {
uint32_t fImageIndex; // image this is associated with
VkSemaphore fAcquireSemaphore; // we signal on this for acquisition of image
VkSemaphore fRenderSemaphore; // we wait on this for rendering to be done
VkCommandBuffer fTransitionCmdBuffers[2]; // to transition layout between present and render
VkFence fUsageFences[2]; // used to ensure this data is no longer used on GPU
BackbufferInfo* getAvailableBackbuffer();
bool createSwapchain(int width, int height, const DisplayParams& params);
void createBuffers(VkFormat format, SkColorType colorType);
void destroyBuffers();
sk_sp<const GrVkBackendContext> fBackendContext;
// simple wrapper class that exists only to initialize a pointer to NULL
template <typename FNPTR_TYPE> class VkPtr {
VkPtr() : fPtr(NULL) {}
VkPtr operator=(FNPTR_TYPE ptr) { fPtr = ptr; return *this; }
operator FNPTR_TYPE() const { return fPtr; }
// Create functions
CreateVkSurfaceFn fCreateVkSurfaceFn;
CanPresentFn fCanPresentFn;
// Vulkan GetProcAddr functions
VkPtr<PFN_vkGetInstanceProcAddr> fGetInstanceProcAddr;
VkPtr<PFN_vkGetDeviceProcAddr> fGetDeviceProcAddr;
// WSI interface functions
VkPtr<PFN_vkDestroySurfaceKHR> fDestroySurfaceKHR;
VkPtr<PFN_vkGetPhysicalDeviceSurfaceSupportKHR> fGetPhysicalDeviceSurfaceSupportKHR;
VkPtr<PFN_vkGetPhysicalDeviceSurfaceCapabilitiesKHR> fGetPhysicalDeviceSurfaceCapabilitiesKHR;
VkPtr<PFN_vkGetPhysicalDeviceSurfaceFormatsKHR> fGetPhysicalDeviceSurfaceFormatsKHR;
VkPtr<PFN_vkGetPhysicalDeviceSurfacePresentModesKHR> fGetPhysicalDeviceSurfacePresentModesKHR;
VkPtr<PFN_vkCreateSwapchainKHR> fCreateSwapchainKHR;
VkPtr<PFN_vkDestroySwapchainKHR> fDestroySwapchainKHR;
VkPtr<PFN_vkGetSwapchainImagesKHR> fGetSwapchainImagesKHR;
VkPtr<PFN_vkAcquireNextImageKHR> fAcquireNextImageKHR;
VkPtr<PFN_vkQueuePresentKHR> fQueuePresentKHR;
VkPtr<PFN_vkGetDeviceQueue> fGetDeviceQueue;
VkSurfaceKHR fSurface;
VkSwapchainKHR fSwapchain;
uint32_t fPresentQueueIndex;
VkQueue fPresentQueue;
uint32_t fImageCount;
VkImage* fImages; // images in the swapchain
VkImageLayout* fImageLayouts; // layouts of these images when not color attachment
sk_sp<SkSurface>* fSurfaces; // surfaces client renders to (may not be based on rts)
VkCommandPool fCommandPool;
BackbufferInfo* fBackbuffers;
uint32_t fCurrentBackbufferIndex;
} // namespace sk_app
#endif // SK_VULKAN