From a04d8fb5cf85e5ff565b145eb863179835fba2c4 Mon Sep 17 00:00:00 2001
From: Billy Laws <blaws05@gmail.com>
Date: Wed, 14 Sep 2022 21:55:19 +0100
Subject: [PATCH] Setup minimal viewport Vulkan pipeline state

---
 .../gpu/interconnect/maxwell_3d/active_state.cpp   |  3 +++
 .../interconnect/maxwell_3d/pipeline_manager.cpp   | 14 +++++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/app/src/main/cpp/skyline/gpu/interconnect/maxwell_3d/active_state.cpp b/app/src/main/cpp/skyline/gpu/interconnect/maxwell_3d/active_state.cpp
index 167b7701..4e729fa9 100644
--- a/app/src/main/cpp/skyline/gpu/interconnect/maxwell_3d/active_state.cpp
+++ b/app/src/main/cpp/skyline/gpu/interconnect/maxwell_3d/active_state.cpp
@@ -196,6 +196,9 @@ namespace skyline::gpu::interconnect::maxwell3d {
     ViewportState::ViewportState(dirty::Handle dirtyHandle, DirtyManager &manager, const EngineRegisters &engine, u32 index) : engine{manager, dirtyHandle, engine}, index{index} {}
 
     void ViewportState::Flush(InterconnectContext &ctx, StateUpdateBuilder &builder) {
+        if (index != 0 && !ctx.gpu.traits.supportsMultipleViewports)
+            return;
+
         if (!engine->viewportScaleOffsetEnable)
             // https://github.com/Ryujinx/Ryujinx/pull/3328
             Logger::Warn("Viewport scale/offset disable is unimplemented");
diff --git a/app/src/main/cpp/skyline/gpu/interconnect/maxwell_3d/pipeline_manager.cpp b/app/src/main/cpp/skyline/gpu/interconnect/maxwell_3d/pipeline_manager.cpp
index f412b135..d12347fa 100644
--- a/app/src/main/cpp/skyline/gpu/interconnect/maxwell_3d/pipeline_manager.cpp
+++ b/app/src/main/cpp/skyline/gpu/interconnect/maxwell_3d/pipeline_manager.cpp
@@ -475,16 +475,28 @@ namespace skyline::gpu::interconnect::maxwell3d {
             .pDynamicStates = dynamicStates.data()
         };
 
+        // Dynamic state will be used instead of these
+        std::array<vk::Rect2D, engine::ViewportCount> emptyScissors{};
+        std::array<vk::Viewport, engine::ViewportCount> emptyViewports{};
+
+        vk::PipelineViewportStateCreateInfo viewportState{
+            .viewportCount = static_cast<u32>(ctx.gpu.traits.supportsMultipleViewports ? engine::ViewportCount : 1),
+            .pViewports = emptyViewports.data(),
+            .scissorCount = static_cast<u32>(ctx.gpu.traits.supportsMultipleViewports ? engine::ViewportCount : 1),
+            .pScissors = emptyScissors.data(),
+        };
+
         return ctx.gpu.graphicsPipelineCache.GetCompiledPipeline(cache::GraphicsPipelineCache::PipelineState{
             .shaderStages = shaderStageInfos,
             .vertexState = vertexInputState,
             .inputAssemblyState = inputAssemblyState,
             .tessellationState = tessellationState,
-            .viewportState = {},
+            .viewportState = viewportState,
             .rasterizationState = rasterizationState,
             .multisampleState = multisampleState,
             .depthStencilState = depthStencilState,
             .colorBlendState = colorBlendState,
+            .dynamicState = dynamicState,
             .colorAttachments = colorAttachments,
             .depthStencilAttachment = depthAttachment,
         }, layoutBindings);