ConicGradientEffectD2D1.h

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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 http://mozilla.org/MPL/2.0/. */

#ifndef MOZILLA_GFX_CONICGRADIENTEFFECTD2D1_H_

#define MOZILLA_GFX_CONICGRADIENTEFFECTD2D1_H_

#include <d2d1_1.h>

#include <d2d1effectauthor.h>

#include <d2d1effecthelpers.h>

#include "2D.h"

#include "mozilla/Attributes.h"

// {fa4e3246-be57-4052-8c8b-881cc3633287}

DEFINE_GUID(CLSID_ConicGradientEffect, 0xfa4e3246, 0xbe57, 0x4052, 0x8c, 0x8b,

            0x88, 0x1c, 0xc3, 0x63, 0x32, 0x87);

// Macro to keep our class nice and clean.

#define SIMPLE_PROP(type, name)              \

 public:                                     \

  HRESULT Set##name(type a##name) {          \

    m##name = a##name;                       \

    return S_OK;                             \

  }                                          \

  type Get##name() const { return m##name; } \

 private:                                    \

  type m##name;

namespace mozilla {

namespace gfx {

enum {

  CONIC_PROP_STOP_COLLECTION = 0,

  CONIC_PROP_CENTER,

  CONIC_PROP_ANGLE,

  CONIC_PROP_START_OFFSET,

  CONIC_PROP_END_OFFSET,

  CONIC_PROP_TRANSFORM

};

class ConicGradientEffectD2D1 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);

  static HRESULT Register(ID2D1Factory1* aFactory);

  static void Unregister(ID2D1Factory1* aFactory);

  static HRESULT __stdcall CreateEffect(IUnknown** aEffectImpl);

  HRESULT SetStopCollection(IUnknown* aStopCollection);

  IUnknown* GetStopCollection() const { return mStopCollection; }

 private:

  already_AddRefed<ID2D1ResourceTexture> CreateGradientTexture();

  ConicGradientEffectD2D1();

  uint32_t mRefCount;

  RefPtr<ID2D1GradientStopCollection> mStopCollection;

  RefPtr<ID2D1EffectContext> mEffectContext;

  RefPtr<ID2D1DrawInfo> mDrawInfo;

  SIMPLE_PROP(D2D1_VECTOR_2F, Center);

  SIMPLE_PROP(FLOAT, Angle);

  SIMPLE_PROP(FLOAT, StartOffset);

  SIMPLE_PROP(FLOAT, EndOffset);

  SIMPLE_PROP(D2D_MATRIX_3X2_F, Transform);

};

}  // namespace gfx

}  // namespace mozilla

#undef SIMPLE_PROP

#endif