VideoConfig: Add SupportsPartialDepthCopies to backend info

D3D11 doesn't support partial copies of depth buffers via
CopySubResource(), so we need to use a different path for the EFB cache.

Source/Core/VideoBackends/D3D/main.cpp

@@ -67,6 +67,7 @@ void VideoBackend::InitBackendInfo()
   g_Config.backend_info.bSupportsST3CTextures = false;
   g_Config.backend_info.bSupportsCopyToVram = true;
   g_Config.backend_info.bSupportsLargePoints = false;
+  g_Config.backend_info.bSupportsPartialDepthCopies = false;
   g_Config.backend_info.bSupportsBitfield = false;
   g_Config.backend_info.bSupportsDynamicSamplerIndexing = false;
   g_Config.backend_info.bSupportsBPTCTextures = false;

Source/Core/VideoBackends/Null/NullBackend.cpp

@@ -50,6 +50,8 @@ void VideoBackend::InitBackendInfo()
   g_Config.backend_info.bSupportsFramebufferFetch = false;
   g_Config.backend_info.bSupportsBackgroundCompiling = false;
   g_Config.backend_info.bSupportsLogicOp = false;
+  g_Config.backend_info.bSupportsLargePoints = false;
+  g_Config.backend_info.bSupportsPartialDepthCopies = false;
 
   // aamodes: We only support 1 sample, so no MSAA
   g_Config.backend_info.Adapters.clear();

Source/Core/VideoBackends/OGL/main.cpp

@@ -89,6 +89,7 @@ void VideoBackend::InitBackendInfo()
   g_Config.backend_info.bSupportsMultithreading = false;
   g_Config.backend_info.bSupportsCopyToVram = true;
   g_Config.backend_info.bSupportsLargePoints = true;
+  g_Config.backend_info.bSupportsPartialDepthCopies = true;
 
   // TODO: There is a bug here, if texel buffers are not supported the graphics options
   // will show the option when it is not supported. The only way around this would be

Source/Core/VideoBackends/Software/SWmain.cpp

@@ -70,6 +70,7 @@ void VideoSoftware::InitBackendInfo()
   g_Config.backend_info.bSupportsBPTCTextures = false;
   g_Config.backend_info.bSupportsCopyToVram = false;
   g_Config.backend_info.bSupportsLargePoints = false;
+  g_Config.backend_info.bSupportsPartialDepthCopies = false;
   g_Config.backend_info.bSupportsFramebufferFetch = false;
   g_Config.backend_info.bSupportsBackgroundCompiling = false;
   g_Config.backend_info.bSupportsLogicOp = true;

Source/Core/VideoBackends/Vulkan/VulkanContext.cpp

@@ -252,6 +252,7 @@ void VulkanContext::PopulateBackendInfo(VideoConfig* config)
   config->backend_info.bSupportsComputeShaders = true;        // Assumed support.
   config->backend_info.bSupportsGPUTextureDecoding = true;    // Assumed support.
   config->backend_info.bSupportsBitfield = true;              // Assumed support.
+  config->backend_info.bSupportsPartialDepthCopies = true;    // Assumed support.
   config->backend_info.bSupportsDynamicSamplerIndexing = true;     // Assumed support.
   config->backend_info.bSupportsPostProcessing = true;             // Assumed support.
   config->backend_info.bSupportsBackgroundCompiling = true;        // Assumed support.

Source/Core/VideoCommon/VideoConfig.h

@@ -216,6 +216,7 @@ struct VideoConfig final
     bool bSupportsFramebufferFetch;  // Used as an alternative to dual-source blend on GLES
     bool bSupportsBackgroundCompiling;
     bool bSupportsLargePoints;
+    bool bSupportsPartialDepthCopies;
   } backend_info;
 
   // Utility