Fix game looking low res due to downsampling before OpenXR

This is especially true for lower then 2k resolutions where there's not as much original pixels.

This does break Meta XR Simulator. But I tested it with VDXR and air link and it works fine.

Author: Crementif

src/rendering/renderer.cpp

@@ -135,14 +135,16 @@ void RND_Renderer::EndFrame() {
 RND_Renderer::Layer3D::Layer3D(VkExtent2D extent) {
     auto viewConfs = VRManager::instance().XR->GetViewConfigurations();
 
+    this->m_recommendedAspectRatios[OpenXR::EyeSide::LEFT] = (float)viewConfs[0].recommendedImageRectWidth / (float)viewConfs[0].recommendedImageRectHeight;
+    this->m_recommendedAspectRatios[OpenXR::EyeSide::RIGHT] = (float)viewConfs[1].recommendedImageRectWidth / (float)viewConfs[1].recommendedImageRectHeight;
+
     this->m_presentPipelines[OpenXR::EyeSide::LEFT] = std::make_unique<RND_D3D12::PresentPipeline<true>>(VRManager::instance().XR->GetRenderer());
     this->m_presentPipelines[OpenXR::EyeSide::RIGHT] = std::make_unique<RND_D3D12::PresentPipeline<true>>(VRManager::instance().XR->GetRenderer());
 
-    // note: it's possible to make a swapchain that matches Cemu's internal resolution and let the headset downsample it, although I doubt there's a benefit
-    this->m_swapchains[OpenXR::EyeSide::LEFT] = std::make_unique<Swapchain<DXGI_FORMAT_R8G8B8A8_UNORM_SRGB>>(viewConfs[0].recommendedImageRectWidth, viewConfs[0].recommendedImageRectHeight, viewConfs[0].recommendedSwapchainSampleCount);
-    this->m_swapchains[OpenXR::EyeSide::RIGHT] = std::make_unique<Swapchain<DXGI_FORMAT_R8G8B8A8_UNORM_SRGB>>(viewConfs[1].recommendedImageRectWidth, viewConfs[1].recommendedImageRectHeight, viewConfs[1].recommendedSwapchainSampleCount);
-    this->m_depthSwapchains[OpenXR::EyeSide::LEFT] = std::make_unique<Swapchain<DXGI_FORMAT_D32_FLOAT>>(viewConfs[0].recommendedImageRectWidth, viewConfs[0].recommendedImageRectHeight, viewConfs[0].recommendedSwapchainSampleCount);
-    this->m_depthSwapchains[OpenXR::EyeSide::RIGHT] = std::make_unique<Swapchain<DXGI_FORMAT_D32_FLOAT>>(viewConfs[1].recommendedImageRectWidth, viewConfs[1].recommendedImageRectHeight, viewConfs[1].recommendedSwapchainSampleCount);
+    this->m_swapchains[OpenXR::EyeSide::LEFT] = std::make_unique<Swapchain<DXGI_FORMAT_R8G8B8A8_UNORM_SRGB>>(extent.width, extent.height, viewConfs[0].recommendedSwapchainSampleCount);
+    this->m_swapchains[OpenXR::EyeSide::RIGHT] = std::make_unique<Swapchain<DXGI_FORMAT_R8G8B8A8_UNORM_SRGB>>(extent.width, extent.height, viewConfs[1].recommendedSwapchainSampleCount);
+    this->m_depthSwapchains[OpenXR::EyeSide::LEFT] = std::make_unique<Swapchain<DXGI_FORMAT_D32_FLOAT>>(extent.width, extent.height, viewConfs[0].recommendedSwapchainSampleCount);
+    this->m_depthSwapchains[OpenXR::EyeSide::RIGHT] = std::make_unique<Swapchain<DXGI_FORMAT_D32_FLOAT>>(extent.width, extent.height, viewConfs[1].recommendedSwapchainSampleCount);
 
     this->m_presentPipelines[OpenXR::EyeSide::LEFT]->BindSettings((float)this->m_swapchains[OpenXR::EyeSide::LEFT]->GetWidth(), (float)this->m_swapchains[OpenXR::EyeSide::LEFT]->GetHeight());
     this->m_presentPipelines[OpenXR::EyeSide::RIGHT]->BindSettings((float)this->m_swapchains[OpenXR::EyeSide::RIGHT]->GetWidth(), (float)this->m_swapchains[OpenXR::EyeSide::RIGHT]->GetHeight());
@@ -403,8 +405,7 @@ RND_Renderer::Layer2D::Layer2D(VkExtent2D extent) {
 
     this->m_presentPipeline = std::make_unique<RND_D3D12::PresentPipeline<false>>(VRManager::instance().XR->GetRenderer());
 
-    // note: it's possible to make a swapchain that matches Cemu's internal resolution and let the headset downsample it, although I doubt there's a benefit
-    this->m_swapchain = std::make_unique<Swapchain<DXGI_FORMAT_R8G8B8A8_UNORM_SRGB>>(viewConfs[0].recommendedImageRectWidth, viewConfs[0].recommendedImageRectHeight, viewConfs[0].recommendedSwapchainSampleCount);
+    this->m_swapchain = std::make_unique<Swapchain<DXGI_FORMAT_R8G8B8A8_UNORM_SRGB>>(extent.width, extent.height, viewConfs[0].recommendedSwapchainSampleCount);
 
     this->m_presentPipeline->BindSettings((float)this->m_swapchain->GetWidth(), (float)this->m_swapchain->GetHeight());
 

src/rendering/renderer.h

@@ -114,7 +114,7 @@ class RND_Renderer {
         void Render(OpenXR::EyeSide side, long frameIdx);
         const std::array<XrCompositionLayerProjectionView, 2>& FinishRendering(long frameIdx);
 
-        float GetAspectRatio(OpenXR::EyeSide side) const { return m_swapchains[side]->GetWidth() / (float)m_swapchains[side]->GetHeight(); }
+        float GetAspectRatio(OpenXR::EyeSide side) const { return m_recommendedAspectRatios[side]; }
         long GetCurrentFrameIdx() const { return m_currentFrameIdx; }
 
     private:
@@ -123,6 +123,7 @@ class RND_Renderer {
         std::array<std::unique_ptr<RND_D3D12::PresentPipeline<true>>, 2> m_presentPipelines;
         std::array<std::array<std::unique_ptr<SharedTexture>, 2>, 2> m_textures;
         std::array<std::array<std::unique_ptr<SharedTexture>, 2>, 2> m_depthTextures;
+        std::array<float, 2> m_recommendedAspectRatios = { 1.0f, 1.0f };
 
         std::array<XrCompositionLayerProjectionView, 2> m_projectionViews = {};
         std::array<XrCompositionLayerDepthInfoKHR, 2> m_projectionViewsDepthInfo = {};