ExtendInputEffectD2D1.h

Enable keyboard shortcuts

/* -*- 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 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;

};

}  // namespace gfx

}  // namespace mozilla

#undef SIMPLE_PROP

#endif