4 files changed, 48 insertions, 6 deletions

diff --git a/src/video_core/renderer_vulkan/pipeline_helper.h b/src/video_core/renderer_vulkan/pipeline_helper.h
index b24f3424a..b7843e995 100644
--- a/src/video_core/renderer_vulkan/pipeline_helper.h
+++ b/src/video_core/renderer_vulkan/pipeline_helper.h
@@ -68,13 +68,15 @@ public:
     }
 
     vk::PipelineLayout CreatePipelineLayout(VkDescriptorSetLayout descriptor_set_layout) const {
+        using Shader::Backend::SPIRV::RenderAreaLayout;
         using Shader::Backend::SPIRV::RescalingLayout;
         const u32 size_offset = is_compute ? sizeof(RescalingLayout::down_factor) : 0u;
         const VkPushConstantRange range{
             .stageFlags = static_cast<VkShaderStageFlags>(
                 is_compute ? VK_SHADER_STAGE_COMPUTE_BIT : VK_SHADER_STAGE_ALL_GRAPHICS),
             .offset = 0,
-            .size = static_cast<u32>(sizeof(RescalingLayout)) - size_offset,
+            .size = static_cast<u32>(sizeof(RescalingLayout)) - size_offset +
+                    static_cast<u32>(sizeof(RenderAreaLayout)),
         };
         return device->GetLogical().CreatePipelineLayout({
             .sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,
@@ -167,6 +169,12 @@ private:
     u32 image_bit{1u};
 };
 
+class RenderAreaPushConstant {
+public:
+    bool uses_render_area{};
+    std::array<f32, 4> words{};
+};
+
 inline void PushImageDescriptors(TextureCache& texture_cache,
                                  UpdateDescriptorQueue& update_descriptor_queue,
                                  const Shader::Info& info, RescalingPushConstant& rescaling,
diff --git a/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp b/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp
index c3f66c8a3..b4372a839 100644
--- a/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp
+++ b/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp
@@ -31,6 +31,7 @@ namespace {
 using boost::container::small_vector;
 using boost::container::static_vector;
 using Shader::ImageBufferDescriptor;
+using Shader::Backend::SPIRV::RENDERAREA_LAYOUT_OFFSET;
 using Shader::Backend::SPIRV::RESCALING_LAYOUT_DOWN_FACTOR_OFFSET;
 using Shader::Backend::SPIRV::RESCALING_LAYOUT_WORDS_OFFSET;
 using Tegra::Texture::TexturePair;
@@ -433,12 +434,19 @@ void GraphicsPipeline::ConfigureImpl(bool is_indexed) {
     update_descriptor_queue.Acquire();
 
     RescalingPushConstant rescaling;
+    RenderAreaPushConstant render_area;
     const VkSampler* samplers_it{samplers.data()};
     const VideoCommon::ImageViewInOut* views_it{views.data()};
     const auto prepare_stage{[&](size_t stage) LAMBDA_FORCEINLINE {
         buffer_cache.BindHostStageBuffers(stage);
         PushImageDescriptors(texture_cache, update_descriptor_queue, stage_infos[stage], rescaling,
                              samplers_it, views_it);
+        const auto& info{stage_infos[0]};
+        if (info.uses_render_area) {
+            render_area.uses_render_area = true;
+            render_area.words = {static_cast<float>(regs.render_area.width),
+                                 static_cast<float>(regs.render_area.height)};
+        }
     }};
     if constexpr (Spec::enabled_stages[0]) {
         prepare_stage(0);
@@ -455,10 +463,11 @@ void GraphicsPipeline::ConfigureImpl(bool is_indexed) {
     if constexpr (Spec::enabled_stages[4]) {
         prepare_stage(4);
     }
-    ConfigureDraw(rescaling);
+    ConfigureDraw(rescaling, render_area);
 }
 
-void GraphicsPipeline::ConfigureDraw(const RescalingPushConstant& rescaling) {
+void GraphicsPipeline::ConfigureDraw(const RescalingPushConstant& rescaling,
+                                     const RenderAreaPushConstant& render_are) {
     texture_cache.UpdateRenderTargets(false);
     scheduler.RequestRenderpass(texture_cache.GetFramebuffer());
 
@@ -474,7 +483,9 @@ void GraphicsPipeline::ConfigureDraw(const RescalingPushConstant& rescaling) {
     const bool bind_pipeline{scheduler.UpdateGraphicsPipeline(this)};
     const void* const descriptor_data{update_descriptor_queue.UpdateData()};
     scheduler.Record([this, descriptor_data, bind_pipeline, rescaling_data = rescaling.Data(),
-                      is_rescaling, update_rescaling](vk::CommandBuffer cmdbuf) {
+                      is_rescaling, update_rescaling,
+                      uses_render_area = render_are.uses_render_area,
+                      render_area_data = render_are.words](vk::CommandBuffer cmdbuf) {
         if (bind_pipeline) {
             cmdbuf.BindPipeline(VK_PIPELINE_BIND_POINT_GRAPHICS, *pipeline);
         }
@@ -483,11 +494,16 @@ void GraphicsPipeline::ConfigureDraw(const RescalingPushConstant& rescaling) {
                              rescaling_data.data());
         if (update_rescaling) {
             const f32 config_down_factor{Settings::values.resolution_info.down_factor};
-            const f32 scale_down_factor{is_rescaling ? config_down_factor : 1.0f};
+            const f32 scale_down_factor{is_rescaling ? config_down_factor : 2.0f};
             cmdbuf.PushConstants(*pipeline_layout, VK_SHADER_STAGE_ALL_GRAPHICS,
                                  RESCALING_LAYOUT_DOWN_FACTOR_OFFSET, sizeof(scale_down_factor),
                                  &scale_down_factor);
         }
+        if (uses_render_area) {
+            cmdbuf.PushConstants(*pipeline_layout, VK_SHADER_STAGE_ALL_GRAPHICS,
+                                 RENDERAREA_LAYOUT_OFFSET, sizeof(render_area_data),
+                                 &render_area_data);
+        }
         if (!descriptor_set_layout) {
             return;
         }
diff --git a/src/video_core/renderer_vulkan/vk_graphics_pipeline.h b/src/video_core/renderer_vulkan/vk_graphics_pipeline.h
index 85602592b..6bf577d25 100644
--- a/src/video_core/renderer_vulkan/vk_graphics_pipeline.h
+++ b/src/video_core/renderer_vulkan/vk_graphics_pipeline.h
@@ -62,6 +62,7 @@ class Device;
 class PipelineStatistics;
 class RenderPassCache;
 class RescalingPushConstant;
+class RenderAreaPushConstant;
 class Scheduler;
 class UpdateDescriptorQueue;
 
@@ -119,7 +120,8 @@ private:
     template <typename Spec>
     void ConfigureImpl(bool is_indexed);
 
-    void ConfigureDraw(const RescalingPushConstant& rescaling);
+    void ConfigureDraw(const RescalingPushConstant& rescaling,
+                       const RenderAreaPushConstant& render_are);
 
     void MakePipeline(VkRenderPass render_pass);
 
diff --git a/src/video_core/renderer_vulkan/vk_rasterizer.cpp b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
index d94dbf873..5af3c930b 100644
--- a/src/video_core/renderer_vulkan/vk_rasterizer.cpp
+++ b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
@@ -683,6 +683,22 @@ void RasterizerVulkan::UpdateViewportsState(Tegra::Engines::Maxwell3D::Regs& reg
     if (!state_tracker.TouchViewports()) {
         return;
     }
+    if (!regs.viewport_transform_enabled) {
+        const auto x = static_cast<float>(regs.render_area.x);
+        const auto y = static_cast<float>(regs.render_area.y);
+        const auto width = static_cast<float>(regs.render_area.width);
+        const auto height = static_cast<float>(regs.render_area.height);
+        VkViewport viewport{
+            .x = x,
+            .y = y,
+            .width = width != 0.0f ? width : 1.0f,
+            .height = height != 0.0f ? height : 1.0f,
+            .minDepth = 0.0f,
+            .maxDepth = 1.0f,
+        };
+        scheduler.Record([viewport](vk::CommandBuffer cmdbuf) { cmdbuf.SetViewport(0, viewport); });
+        return;
+    }
     const bool is_rescaling{texture_cache.IsRescaling()};
     const float scale = is_rescaling ? Settings::values.resolution_info.up_factor : 1.0f;
     const std::array viewports{