From c339af37a73de144fbbad706e43aefe278640cd7 Mon Sep 17 00:00:00 2001
From: GPUCode <geoster3d@gmail.com>
Date: Mon, 5 Jun 2023 19:03:16 +0300
Subject: renderer_vulkan: Respect viewport limit

---
 src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp |  5 +++--
 src/video_core/renderer_vulkan/vk_rasterizer.cpp        | 16 ++++++++++++----
 src/video_core/vulkan_common/vulkan_device.h            |  4 ++++
 3 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp b/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp
index c1595642e..ad35cacac 100644
--- a/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp
+++ b/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp
@@ -652,13 +652,14 @@ void GraphicsPipeline::MakePipeline(VkRenderPass render_pass) {
         .pNext = nullptr,
         .negativeOneToOne = key.state.ndc_minus_one_to_one.Value() != 0 ? VK_TRUE : VK_FALSE,
     };
+    const u32 num_viewports = std::min<u32>(device.GetMaxViewports(), Maxwell::NumViewports);
     VkPipelineViewportStateCreateInfo viewport_ci{
         .sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO,
         .pNext = nullptr,
         .flags = 0,
-        .viewportCount = Maxwell::NumViewports,
+        .viewportCount = num_viewports,
         .pViewports = nullptr,
-        .scissorCount = Maxwell::NumViewports,
+        .scissorCount = num_viewports,
         .pScissors = nullptr,
     };
     if (device.IsNvViewportSwizzleSupported()) {
diff --git a/src/video_core/renderer_vulkan/vk_rasterizer.cpp b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
index 84e3a30cc..268b955fb 100644
--- a/src/video_core/renderer_vulkan/vk_rasterizer.cpp
+++ b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
@@ -925,7 +925,7 @@ void RasterizerVulkan::UpdateViewportsState(Tegra::Engines::Maxwell3D::Regs& reg
     }
     const bool is_rescaling{texture_cache.IsRescaling()};
     const float scale = is_rescaling ? Settings::values.resolution_info.up_factor : 1.0f;
-    const std::array viewports{
+    const std::array viewport_list{
         GetViewportState(device, regs, 0, scale),  GetViewportState(device, regs, 1, scale),
         GetViewportState(device, regs, 2, scale),  GetViewportState(device, regs, 3, scale),
         GetViewportState(device, regs, 4, scale),  GetViewportState(device, regs, 5, scale),
@@ -935,7 +935,11 @@ void RasterizerVulkan::UpdateViewportsState(Tegra::Engines::Maxwell3D::Regs& reg
         GetViewportState(device, regs, 12, scale), GetViewportState(device, regs, 13, scale),
         GetViewportState(device, regs, 14, scale), GetViewportState(device, regs, 15, scale),
     };
-    scheduler.Record([viewports](vk::CommandBuffer cmdbuf) { cmdbuf.SetViewport(0, viewports); });
+    scheduler.Record([this, viewport_list](vk::CommandBuffer cmdbuf) {
+        const u32 num_viewports = std::min<u32>(device.GetMaxViewports(), Maxwell::NumViewports);
+        const vk::Span<VkViewport> viewports(viewport_list.data(), num_viewports);
+        cmdbuf.SetViewport(0, viewports);
+    });
 }
 
 void RasterizerVulkan::UpdateScissorsState(Tegra::Engines::Maxwell3D::Regs& regs) {
@@ -948,7 +952,7 @@ void RasterizerVulkan::UpdateScissorsState(Tegra::Engines::Maxwell3D::Regs& regs
         up_scale = Settings::values.resolution_info.up_scale;
         down_shift = Settings::values.resolution_info.down_shift;
     }
-    const std::array scissors{
+    const std::array scissor_list{
         GetScissorState(regs, 0, up_scale, down_shift),
         GetScissorState(regs, 1, up_scale, down_shift),
         GetScissorState(regs, 2, up_scale, down_shift),
@@ -966,7 +970,11 @@ void RasterizerVulkan::UpdateScissorsState(Tegra::Engines::Maxwell3D::Regs& regs
         GetScissorState(regs, 14, up_scale, down_shift),
         GetScissorState(regs, 15, up_scale, down_shift),
     };
-    scheduler.Record([scissors](vk::CommandBuffer cmdbuf) { cmdbuf.SetScissor(0, scissors); });
+    scheduler.Record([this, scissor_list](vk::CommandBuffer cmdbuf) {
+        const u32 num_scissors = std::min<u32>(device.GetMaxViewports(), Maxwell::NumViewports);
+        const vk::Span<VkRect2D> scissors(scissor_list.data(), num_scissors);
+        cmdbuf.SetScissor(0, scissors);
+    });
 }
 
 void RasterizerVulkan::UpdateDepthBias(Tegra::Engines::Maxwell3D::Regs& regs) {
diff --git a/src/video_core/vulkan_common/vulkan_device.h b/src/video_core/vulkan_common/vulkan_device.h
index b84af3dfb..8a05a4fab 100644
--- a/src/video_core/vulkan_common/vulkan_device.h
+++ b/src/video_core/vulkan_common/vulkan_device.h
@@ -588,6 +588,10 @@ public:
         return properties.properties.limits.maxVertexInputBindings;
     }
 
+    u32 GetMaxViewports() const {
+        return properties.properties.limits.maxViewports;
+    }
+
     bool SupportsConditionalBarriers() const {
         return supports_conditional_barriers;
     }
-- 
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