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+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MOZILLA_GFX_EXTENDINPUTEFFECTD2D1_H_
+#define MOZILLA_GFX_EXTENDINPUTEFFECTD2D1_H_
+
+#include <d2d1_1.h>
+#include <d2d1effectauthor.h>
+#include <d2d1effecthelpers.h>
+
+#include "2D.h"
+#include "mozilla/Attributes.h"
+
+// {97143DC6-CBC4-4DD4-A8BA-13342B0BA46D}
+DEFINE_GUID(CLSID_ExtendInputEffect,
+0x5fb55c7c, 0xd795, 0x4ba3, 0xa9, 0x5c, 0x22, 0x82, 0x5d, 0x0c, 0x4d, 0xf7);
+
+namespace mozilla {
+namespace gfx {
+
+enum {
+ EXTENDINPUT_PROP_OUTPUT_RECT = 0
+};
+
+// An effect type that passes through its input unchanged but sets the effect's
+// output rect to a specified rect. Unlike the built-in Crop effect, the
+// ExtendInput effect can extend the input rect, and not just make it smaller.
+// The added margins are filled with transparent black.
+// Some effects have different output depending on their input effect's output
+// rect, for example the Border effect (which repeats the edges of its input
+// effect's output rect) or the component transfer and color matrix effects
+// (which can transform transparent pixels into non-transparent ones, but only
+// inside their input effect's output rect).
+class ExtendInputEffectD2D1 final : public ID2D1EffectImpl
+ , public ID2D1DrawTransform
+{
+public:
+ // ID2D1EffectImpl
+ IFACEMETHODIMP Initialize(ID2D1EffectContext* pContextInternal, ID2D1TransformGraph* pTransformGraph);
+ IFACEMETHODIMP PrepareForRender(D2D1_CHANGE_TYPE changeType);
+ IFACEMETHODIMP SetGraph(ID2D1TransformGraph* pGraph);
+
+ // IUnknown
+ IFACEMETHODIMP_(ULONG) AddRef();
+ IFACEMETHODIMP_(ULONG) Release();
+ IFACEMETHODIMP QueryInterface(REFIID riid, void** ppOutput);
+
+ // ID2D1Transform
+ IFACEMETHODIMP MapInputRectsToOutputRect(const D2D1_RECT_L* pInputRects,
+ const D2D1_RECT_L* pInputOpaqueSubRects,
+ UINT32 inputRectCount,
+ D2D1_RECT_L* pOutputRect,
+ D2D1_RECT_L* pOutputOpaqueSubRect);
+ IFACEMETHODIMP MapOutputRectToInputRects(const D2D1_RECT_L* pOutputRect,
+ D2D1_RECT_L* pInputRects,
+ UINT32 inputRectCount) const;
+ IFACEMETHODIMP MapInvalidRect(UINT32 inputIndex,
+ D2D1_RECT_L invalidInputRect,
+ D2D1_RECT_L* pInvalidOutputRect) const;
+
+ // ID2D1TransformNode
+ IFACEMETHODIMP_(UINT32) GetInputCount() const { return 1; }
+
+ // ID2D1DrawTransform
+ IFACEMETHODIMP SetDrawInfo(ID2D1DrawInfo *pDrawInfo) { return S_OK; }
+
+ static HRESULT Register(ID2D1Factory1* aFactory);
+ static void Unregister(ID2D1Factory1* aFactory);
+ static HRESULT __stdcall CreateEffect(IUnknown** aEffectImpl);
+
+ HRESULT SetOutputRect(D2D1_VECTOR_4F aOutputRect)
+ { mOutputRect = aOutputRect; return S_OK; }
+ D2D1_VECTOR_4F GetOutputRect() const { return mOutputRect; }
+
+private:
+ ExtendInputEffectD2D1();
+
+ uint32_t mRefCount;
+ D2D1_VECTOR_4F mOutputRect;
+};
+
+}
+}
+#undef SIMPLE_PROP
+
+#endif