Implement scaled vertex buffer format emulation

These formats are unsupported by mobile GPUs so they need to be emulated in shaders instead.

2 files changed, 9 insertions, 0 deletions

diff --git a/src/video_core/vulkan_common/vulkan_device.cpp b/src/video_core/vulkan_common/vulkan_device.cpp
index 01540c10b..63e1c7d63 100644
--- a/src/video_core/vulkan_common/vulkan_device.cpp
+++ b/src/video_core/vulkan_common/vulkan_device.cpp
@@ -363,6 +363,8 @@ Device::Device(VkInstance instance_, vk::PhysicalDevice physical_, VkSurfaceKHR
 
 #ifdef ANDROID
     if (is_adreno) {
+        must_emulate_scaled_formats = true;
+
         LOG_WARNING(Render_Vulkan, "Adreno drivers have broken VK_EXT_extended_dynamic_state");
         extensions.extended_dynamic_state = false;
         loaded_extensions.erase(VK_EXT_EXTENDED_DYNAMIC_STATE_EXTENSION_NAME);
@@ -391,6 +393,8 @@ Device::Device(VkInstance instance_, vk::PhysicalDevice physical_, VkSurfaceKHR
     }
 
     if (is_arm) {
+        must_emulate_scaled_formats = true;
+
         LOG_WARNING(Render_Vulkan, "ARM drivers have broken VK_EXT_extended_dynamic_state");
         extensions.extended_dynamic_state = false;
         loaded_extensions.erase(VK_EXT_EXTENDED_DYNAMIC_STATE_EXTENSION_NAME);
diff --git a/src/video_core/vulkan_common/vulkan_device.h b/src/video_core/vulkan_common/vulkan_device.h
index 5f1c63ff9..f9d8c47ba 100644
--- a/src/video_core/vulkan_common/vulkan_device.h
+++ b/src/video_core/vulkan_common/vulkan_device.h
@@ -551,6 +551,10 @@ public:
         return cant_blit_msaa;
     }
 
+    bool MustEmulateScaledFormats() const {
+        return must_emulate_scaled_formats;
+    }
+
     bool MustEmulateBGR565() const {
         return must_emulate_bgr565;
     }
@@ -666,6 +670,7 @@ private:
     bool has_nsight_graphics{};             ///< Has Nsight Graphics attached
     bool supports_d24_depth{};              ///< Supports D24 depth buffers.
     bool cant_blit_msaa{};                  ///< Does not support MSAA<->MSAA blitting.
+    bool must_emulate_scaled_formats{};     ///< Requires scaled vertex format emulation
     bool must_emulate_bgr565{};             ///< Emulates BGR565 by swizzling RGB565 format.
     bool dynamic_state3_blending{};         ///< Has all blending features of dynamic_state3.
     bool dynamic_state3_enables{};          ///< Has all enables features of dynamic_state3.