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Source/Engine/Graphics/GPUContext.cpp

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#include "GPUContext.h"
+#include "GPUDevice.h"
+#include "RenderTask.h"
+#include "Textures/GPUTexture.h"
+
+GPUContext::GPUContext(GPUDevice* device)
+    : PersistentScriptingObject(ScriptingObjectSpawnParams(Guid::New(), TypeInitializer))
+    , _device(device)
+{
+}
+
+void GPUContext::FrameBegin()
+{
+}
+
+void GPUContext::FrameEnd()
+{
+    ClearState();
+    FlushState();
+}
+
+void GPUContext::BindSR(int32 slot, GPUTexture* t)
+{
+    ASSERT_LOW_LAYER(t == nullptr || t->ResidentMipLevels() == 0 || t->IsShaderResource());
+    BindSR(slot, GET_TEXTURE_VIEW_SAFE(t));
+}
+
+void GPUContext::DrawFullscreenTriangle(int32 instanceCount)
+{
+    auto vb = _device->GetFullscreenTriangleVB();
+    BindVB(ToSpan(&vb, 1));
+    DrawInstanced(3, instanceCount);
+}
+
+void GPUContext::Draw(GPUTexture* dst, GPUTexture* src)
+{
+    ASSERT_LOW_LAYER(dst && src);
+    ResetRenderTarget();
+    const float width = (float)dst->Width();
+    const float height = (float)dst->Height();
+    SetViewport(width, height);
+    SetRenderTarget(dst->View());
+    BindSR(0, src->View());
+    SetState(_device->GetCopyLinearPS());
+    DrawFullscreenTriangle();
+}
+
+void GPUContext::Draw(GPUTexture* rt)
+{
+    ASSERT_LOW_LAYER(rt);
+    BindSR(0, rt);
+    SetState(_device->GetCopyLinearPS());
+    DrawFullscreenTriangle();
+}
+
+void GPUContext::Draw(GPUTextureView* rt)
+{
+    ASSERT_LOW_LAYER(rt);
+    BindSR(0, rt);
+    SetState(_device->GetCopyLinearPS());
+    DrawFullscreenTriangle();
+}