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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 */
#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 {
// 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 {
// ID2D1EffectImpl
IFACEMETHODIMP Initialize(ID2D1EffectContext* pContextInternal,
ID2D1TransformGraph* pTransformGraph);
IFACEMETHODIMP PrepareForRender(D2D1_CHANGE_TYPE changeType);
IFACEMETHODIMP SetGraph(ID2D1TransformGraph* pGraph);
// IUnknown
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; }
uint32_t mRefCount;
D2D1_VECTOR_4F mOutputRect;
} // namespace gfx
} // namespace mozilla