From 3218af38d0c29f5b7bd427e62f681c40909662ac Mon Sep 17 00:00:00 2001
From: Wunk <wunkolo@gmail.com>
Date: Sun, 5 Nov 2023 12:26:09 -0800
Subject: [PATCH] renderer_vulkan: Add scissor and viewport to dynamic pipeline
 state (#7114)

Adds the current viewport and scissor to the dynamic pipeline state to
reduce redundant viewport/scissor assignments in the command buffer.
This greatly reduces the amount of API calls to `vkCmdSetViewport` and
`vkCmdSetScissor` by only emitting the API call when the state actually
changes.
---
 .../renderer_vulkan/vk_graphics_pipeline.h    |  3 ++
 .../renderer_vulkan/vk_pipeline_cache.cpp     | 26 ++++++++++++++++
 .../renderer_vulkan/vk_rasterizer.cpp         | 31 +++++--------------
 3 files changed, 36 insertions(+), 24 deletions(-)

diff --git a/src/video_core/renderer_vulkan/vk_graphics_pipeline.h b/src/video_core/renderer_vulkan/vk_graphics_pipeline.h
index 8d27a45e59..af2abd6d9d 100644
--- a/src/video_core/renderer_vulkan/vk_graphics_pipeline.h
+++ b/src/video_core/renderer_vulkan/vk_graphics_pipeline.h
@@ -89,6 +89,9 @@ struct DynamicState {
     u8 stencil_compare_mask;
     u8 stencil_write_mask;
 
+    Common::Rectangle<u32> scissor;
+    Common::Rectangle<s32> viewport;
+
     bool operator==(const DynamicState& other) const noexcept {
         return std::memcmp(this, &other, sizeof(DynamicState)) == 0;
     }
diff --git a/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp b/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
index bb8628f9f9..aa1d2cbe8d 100644
--- a/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
+++ b/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
@@ -206,6 +206,32 @@ bool PipelineCache::BindPipeline(const PipelineInfo& info, bool wait_built) {
                       current_depth_stencil = current_info.depth_stencil,
                       rasterization = info.rasterization,
                       depth_stencil = info.depth_stencil](vk::CommandBuffer cmdbuf) {
+        if (dynamic.viewport != current_dynamic.viewport || is_dirty) {
+            const vk::Viewport vk_viewport = {
+                .x = static_cast<f32>(dynamic.viewport.left),
+                .y = static_cast<f32>(dynamic.viewport.top),
+                .width = static_cast<f32>(dynamic.viewport.GetWidth()),
+                .height = static_cast<f32>(dynamic.viewport.GetHeight()),
+                .minDepth = 0.f,
+                .maxDepth = 1.f,
+            };
+            cmdbuf.setViewport(0, vk_viewport);
+        }
+
+        if (dynamic.scissor != current_dynamic.scissor || is_dirty) {
+            const vk::Rect2D scissor = {
+                .offset{
+                    .x = static_cast<s32>(dynamic.scissor.left),
+                    .y = static_cast<s32>(dynamic.scissor.bottom),
+                },
+                .extent{
+                    .width = dynamic.scissor.GetWidth(),
+                    .height = dynamic.scissor.GetHeight(),
+                },
+            };
+            cmdbuf.setScissor(0, scissor);
+        }
+
         if (dynamic.stencil_compare_mask != current_dynamic.stencil_compare_mask || is_dirty) {
             cmdbuf.setStencilCompareMask(vk::StencilFaceFlagBits::eFrontAndBack,
                                          dynamic.stencil_compare_mask);
diff --git a/src/video_core/renderer_vulkan/vk_rasterizer.cpp b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
index 68091a77f2..f990661762 100644
--- a/src/video_core/renderer_vulkan/vk_rasterizer.cpp
+++ b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
@@ -512,30 +512,13 @@ bool RasterizerVulkan::Draw(bool accelerate, bool is_indexed) {
 
     // Configure viewport and scissor
     const auto viewport = fb_helper.Viewport();
-    scheduler.Record([viewport, draw_rect](vk::CommandBuffer cmdbuf) {
-        const vk::Viewport vk_viewport = {
-            .x = static_cast<f32>(viewport.x),
-            .y = static_cast<f32>(viewport.y),
-            .width = static_cast<f32>(viewport.width),
-            .height = static_cast<f32>(viewport.height),
-            .minDepth = 0.f,
-            .maxDepth = 1.f,
-        };
-
-        const vk::Rect2D scissor = {
-            .offset{
-                .x = static_cast<s32>(draw_rect.left),
-                .y = static_cast<s32>(draw_rect.bottom),
-            },
-            .extent{
-                .width = draw_rect.GetWidth(),
-                .height = draw_rect.GetHeight(),
-            },
-        };
-
-        cmdbuf.setViewport(0, vk_viewport);
-        cmdbuf.setScissor(0, scissor);
-    });
+    pipeline_info.dynamic.viewport = Common::Rectangle<s32>{
+        viewport.x,
+        viewport.y,
+        viewport.x + viewport.width,
+        viewport.y + viewport.height,
+    };
+    pipeline_info.dynamic.scissor = draw_rect;
 
     // Draw the vertex batch
     bool succeeded = true;