From e9ddad2dfb1ba6ee16cdecdf82a308b76aa87741 Mon Sep 17 00:00:00 2001
From: Patrick Wuttke <mewin@mewin.de>
Date: Wed, 9 Oct 2024 09:31:28 +0200
Subject: [PATCH] Added a DX12/DXIL variant of the clear_swapchain program.

---
 .../0_clear_swapchain_dxil/app.cpp            | 30 +++++++++++++++++++
 .../0_clear_swapchain_dxil/app.hpp            | 19 ++++++++++++
 private/sdl_gpu_test/application.cpp          |  2 +-
 private/sdl_gpu_test/application.hpp          |  6 ++++
 4 files changed, 56 insertions(+), 1 deletion(-)
 create mode 100644 private/sdl_gpu_test/0_clear_swapchain_dxil/app.cpp
 create mode 100644 private/sdl_gpu_test/0_clear_swapchain_dxil/app.hpp

diff --git a/private/sdl_gpu_test/0_clear_swapchain_dxil/app.cpp b/private/sdl_gpu_test/0_clear_swapchain_dxil/app.cpp
new file mode 100644
index 0000000..2512d29
--- /dev/null
+++ b/private/sdl_gpu_test/0_clear_swapchain_dxil/app.cpp
@@ -0,0 +1,30 @@
+
+#include "./app.hpp"
+
+namespace sdl_gpu_test
+{
+void ClearSwapchainDXILApp::init(const AppInitArgs& args)
+{
+    mOptions.shaderFormats = {.dxil = true};
+    Application::init(args);
+}
+
+void ClearSwapchainDXILApp::update(const AppUpdateArgs& args)
+{
+    Application::update(args);
+
+    sdlpp::GPUCommandBuffer cmdBuffer = mDevice.acquireCommandBuffer();
+    Uint32 swapchainWidth = 0, swapchainHeight = 0;
+    sdlpp::GPUTexture swapchainTexture = cmdBuffer.acquireSwapchainTexture(mWindow, swapchainWidth, swapchainHeight);
+    std::array colorTargets = {sdlpp::GPUColorTargetInfo{
+        .texture = swapchainTexture,
+        .clearColor = {.r = 1.f, .g = 0.f, .b = 0.f, .a = 1.f},
+        .loadOp = sdlpp::GPULoadOp::CLEAR,
+    }};
+    sdlpp::GPURenderPass renderPass = cmdBuffer.beginRenderPass({
+        .colorTargetInfos = colorTargets
+    });
+    renderPass.end();
+    cmdBuffer.submit();
+}
+}
diff --git a/private/sdl_gpu_test/0_clear_swapchain_dxil/app.hpp b/private/sdl_gpu_test/0_clear_swapchain_dxil/app.hpp
new file mode 100644
index 0000000..688bb10
--- /dev/null
+++ b/private/sdl_gpu_test/0_clear_swapchain_dxil/app.hpp
@@ -0,0 +1,19 @@
+
+#pragma once
+
+#if !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_0_CLEAR_SWAPCHAIN_DXIL_APP_HPP_INCLUDED)
+#define SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_0_CLEAR_SWAPCHAIN_DXIL_APP_HPP_INCLUDED 1
+
+#include "../application.hpp"
+
+namespace sdl_gpu_test
+{
+class ClearSwapchainDXILApp : public Application
+{
+public:
+    void init(const AppInitArgs& args) override;
+    void update(const AppUpdateArgs& args) override;
+};
+} // namespace sdl_gpu_test
+
+#endif // !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_0_CLEAR_SWAPCHAIN_DXIL_APP_HPP_INCLUDED)
diff --git a/private/sdl_gpu_test/application.cpp b/private/sdl_gpu_test/application.cpp
index 9e1fc1a..ab784d2 100644
--- a/private/sdl_gpu_test/application.cpp
+++ b/private/sdl_gpu_test/application.cpp
@@ -20,7 +20,7 @@ void Application::init(const AppInitArgs& args)
     });
 
     mDevice.create({
-        .formatFlags{.spirv = true},
+        .formatFlags = mOptions.shaderFormats,
         .debugMode = true
     });
     mDevice.claimWindow(mWindow);
diff --git a/private/sdl_gpu_test/application.hpp b/private/sdl_gpu_test/application.hpp
index de62374..e4b59f6 100644
--- a/private/sdl_gpu_test/application.hpp
+++ b/private/sdl_gpu_test/application.hpp
@@ -26,6 +26,11 @@ struct AppCleanupArgs
 
 };
 
+struct AppOptions
+{
+    sdlpp::GPUShaderFormatFlags shaderFormats = {.spirv = true};
+};
+
 struct AppUpdateArgs
 {
     float secondsSinceStart = 0.f;
@@ -39,6 +44,7 @@ protected:
     sdlpp::GPUDevice mDevice;
     mijin::StackedFileSystemAdapter mFileSystem;
     mijin::SimpleTaskLoop mTaskLoop;
+    AppOptions mOptions;
     bool mRunning = true;
 public:
     virtual ~Application() noexcept = default;