shader: Rework varyings and implement passthrough geometry shaders

Put all varyings into a single std::bitset with helpers to access it.

Implement passthrough geometry shaders using host's.

2 files changed, 12 insertions, 0 deletions

diff --git a/src/video_core/vulkan_common/vulkan_device.cpp b/src/video_core/vulkan_common/vulkan_device.cpp
index 7b184d2f8..da4721e6b 100644
--- a/src/video_core/vulkan_common/vulkan_device.cpp
+++ b/src/video_core/vulkan_common/vulkan_device.cpp
@@ -350,6 +350,10 @@ Device::Device(VkInstance instance_, vk::PhysicalDevice physical_, VkSurfaceKHR
         LOG_INFO(Render_Vulkan, "Device doesn't support viewport masks");
     }
 
+    if (!nv_geometry_shader_passthrough) {
+        LOG_INFO(Render_Vulkan, "Device doesn't support passthrough geometry shaders");
+    }
+
     VkPhysicalDeviceUniformBufferStandardLayoutFeaturesKHR std430_layout;
     if (khr_uniform_buffer_standard_layout) {
         std430_layout = {
@@ -768,6 +772,8 @@ std::vector<const char*> Device::LoadExtensions(bool requires_surface) {
         };
         test(nv_viewport_swizzle, VK_NV_VIEWPORT_SWIZZLE_EXTENSION_NAME, true);
         test(nv_viewport_array2, VK_NV_VIEWPORT_ARRAY2_EXTENSION_NAME, true);
+        test(nv_geometry_shader_passthrough, VK_NV_GEOMETRY_SHADER_PASSTHROUGH_EXTENSION_NAME,
+             true);
         test(khr_uniform_buffer_standard_layout,
              VK_KHR_UNIFORM_BUFFER_STANDARD_LAYOUT_EXTENSION_NAME, true);
         test(khr_spirv_1_4, VK_KHR_SPIRV_1_4_EXTENSION_NAME, true);
diff --git a/src/video_core/vulkan_common/vulkan_device.h b/src/video_core/vulkan_common/vulkan_device.h
index a9c0a0e4d..d0adc0127 100644
--- a/src/video_core/vulkan_common/vulkan_device.h
+++ b/src/video_core/vulkan_common/vulkan_device.h
@@ -194,6 +194,11 @@ public:
         return nv_viewport_array2;
     }
 
+    /// Returns true if the device supports VK_NV_geometry_shader_passthrough.
+    bool IsNvGeometryShaderPassthroughSupported() const {
+        return nv_geometry_shader_passthrough;
+    }
+
     /// Returns true if the device supports VK_KHR_uniform_buffer_standard_layout.
     bool IsKhrUniformBufferStandardLayoutSupported() const {
         return khr_uniform_buffer_standard_layout;
@@ -363,6 +368,7 @@ private:
     bool is_blit_depth_stencil_supported{};     ///< Support for blitting from and to depth stencil.
     bool nv_viewport_swizzle{};                 ///< Support for VK_NV_viewport_swizzle.
     bool nv_viewport_array2{};                  ///< Support for VK_NV_viewport_array2.
+    bool nv_geometry_shader_passthrough{};      ///< Support for VK_NV_geometry_shader_passthrough.
     bool khr_uniform_buffer_standard_layout{};  ///< Support for scalar uniform buffer layouts.
     bool khr_spirv_1_4{};                       ///< Support for VK_KHR_spirv_1_4.
     bool khr_workgroup_memory_explicit_layout{}; ///< Support for explicit workgroup layouts.