[Rendering] WIP;

Author: LittleCodingFox

Engine/Staple.Core/Rendering/RenderSystem/Backend/Impls/SDLGPU/Commands/SDLGPUUpdateTextureCommand.cs

@@ -45,7 +45,10 @@ public void Update(IRendererBackend rendererBackend)
             backend.FinishPasses();
         }
 
-        backend.copyPass = SDL.SDL_BeginGPUCopyPass(backend.commandBuffer);
+        if(backend.copyPass == nint.Zero)
+        {
+            backend.copyPass = SDL.SDL_BeginGPUCopyPass(backend.commandBuffer);
+        }
 
         if (backend.copyPass == nint.Zero)
         {

Engine/Staple.Core/Rendering/RenderSystem/Backend/Impls/SDLGPU/SDLGPURenderPass.cs

@@ -35,8 +35,7 @@ internal static ResourceHandle<T> ReserveResourceBuffer<T>(BufferResource[] reso
     {
         for (var i = 0; i < resources.Length; i++)
         {
-            if (resources[i] is null ||
-                resources[i].used)
+            if (resources[i]?.used ?? false)
             {
                 continue;
             }

Engine/Staple.Core/Rendering/RenderSystem/Backend/Impls/SDLGPU/SDLGPURendererBackend+Buffers.cs

@@ -36,8 +36,7 @@ internal static ResourceHandle<Texture> ReserveTextureResource(TextureResource[]
     {
         for (var i = 0; i < resources.Length; i++)
         {
-            if (resources[i] is null ||
-                resources[i].used)
+            if (resources[i]?.used ?? false)
             {
                 continue;
             }

Engine/Staple.Core/Rendering/RenderSystem/Backend/Impls/SDLGPU/SDLGPURendererBackend+Textures.cs

@@ -189,8 +189,6 @@ public bool Initialize(RendererType renderer, bool debug, IRenderWindow window,
 
         UpdateRenderMode(renderFlags);
 
-        BeginFrame();
-
         return true;
     }
 

Engine/Staple.Core/Rendering/RenderSystem/Backend/Impls/SDLGPU/SDLGPURendererBackend.cs

@@ -207,7 +207,6 @@
 		<Compile Include="Rendering\RenderSystem\Backend\Impls\SDLGPU\SDLGPUIndexBuffer.cs" />
 		<Compile Include="Rendering\RenderSystem\Backend\Impls\SDLGPU\SDLGPURendererBackend+Textures.cs" />
 		<Compile Include="Rendering\RenderSystem\Backend\Impls\SDLGPU\SDLGPURendererBackend.cs" />
-		<Compile Include="Rendering\RenderSystem\Backend\Impls\SDLGPU\SDLGPURenderPass.cs" />
 		<Compile Include="Rendering\RenderSystem\Backend\Impls\SDLGPU\SDLGPUShaderProgram.cs" />
 		<Compile Include="Rendering\RenderSystem\Backend\Impls\SDLGPU\SDLGPUTexture.cs" />
 		<Compile Include="Rendering\RenderSystem\Backend\Impls\SDLGPU\SDLGPUVertexBuffer.cs" />