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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/. */
#include "ExtendInputEffectD2D1.h"
#include "Logging.h"
#include "ShadersD2D1.h"
#include "HelpersD2D.h"
#include <vector>
#define TEXTW(x) L##x
#define XML(X) TEXTW(#X) // This macro creates a single string from multiple lines of text.
static const PCWSTR kXmlDescription =
XML(
<?xml version='1.0'?>
<Effect>
<!-- System Properties -->
<Property name='DisplayName' type='string' value='ExtendInputEffect'/>
<Property name='Author' type='string' value='Mozilla'/>
<Property name='Category' type='string' value='Utility Effects'/>
<Property name='Description' type='string' value='This effect is used to extend the output rect of any input effect to a specified rect.'/>
<Inputs>
<Input name='InputEffect'/>
</Inputs>
<Property name='OutputRect' type='vector4'>
<Property name='DisplayName' type='string' value='Output Rect'/>
</Property>
</Effect>
);
namespace mozilla {
namespace gfx {
ExtendInputEffectD2D1::ExtendInputEffectD2D1()
: mRefCount(0)
, mOutputRect(D2D1::Vector4F(-FLT_MAX, -FLT_MAX, FLT_MAX, FLT_MAX))
{
}
IFACEMETHODIMP
ExtendInputEffectD2D1::Initialize(ID2D1EffectContext* pContextInternal, ID2D1TransformGraph* pTransformGraph)
{
HRESULT hr;
hr = pTransformGraph->SetSingleTransformNode(this);
if (FAILED(hr)) {
return hr;
}
return S_OK;
}
IFACEMETHODIMP
ExtendInputEffectD2D1::PrepareForRender(D2D1_CHANGE_TYPE changeType)
{
return S_OK;
}
IFACEMETHODIMP
ExtendInputEffectD2D1::SetGraph(ID2D1TransformGraph* pGraph)
{
return E_NOTIMPL;
}
IFACEMETHODIMP_(ULONG)
ExtendInputEffectD2D1::AddRef()
{
return ++mRefCount;
}
IFACEMETHODIMP_(ULONG)
ExtendInputEffectD2D1::Release()
{
if (!--mRefCount) {
delete this;
return 0;
}
return mRefCount;
}
IFACEMETHODIMP
ExtendInputEffectD2D1::QueryInterface(const IID &aIID, void **aPtr)
{
if (!aPtr) {
return E_POINTER;
}
if (aIID == IID_IUnknown) {
*aPtr = static_cast<IUnknown*>(static_cast<ID2D1EffectImpl*>(this));
} else if (aIID == IID_ID2D1EffectImpl) {
*aPtr = static_cast<ID2D1EffectImpl*>(this);
} else if (aIID == IID_ID2D1DrawTransform) {
*aPtr = static_cast<ID2D1DrawTransform*>(this);
} else if (aIID == IID_ID2D1Transform) {
*aPtr = static_cast<ID2D1Transform*>(this);
} else if (aIID == IID_ID2D1TransformNode) {
*aPtr = static_cast<ID2D1TransformNode*>(this);
} else {
return E_NOINTERFACE;
}
static_cast<IUnknown*>(*aPtr)->AddRef();
return S_OK;
}
static D2D1_RECT_L
ConvertFloatToLongRect(const D2D1_VECTOR_4F& aRect)
{
// Clamp values to LONG range. We can't use std::min/max here because we want
// the comparison to operate on a type that's different from the type of the
// result.
return D2D1::RectL(aRect.x <= LONG_MIN ? LONG_MIN : LONG(aRect.x),
aRect.y <= LONG_MIN ? LONG_MIN : LONG(aRect.y),
aRect.z >= LONG_MAX ? LONG_MAX : LONG(aRect.z),
aRect.w >= LONG_MAX ? LONG_MAX : LONG(aRect.w));
}
static D2D1_RECT_L
IntersectRect(const D2D1_RECT_L& aRect1, const D2D1_RECT_L& aRect2)
{
return D2D1::RectL(std::max(aRect1.left, aRect2.left),
std::max(aRect1.top, aRect2.top),
std::min(aRect1.right, aRect2.right),
std::min(aRect1.bottom, aRect2.bottom));
}
IFACEMETHODIMP
ExtendInputEffectD2D1::MapInputRectsToOutputRect(const D2D1_RECT_L* pInputRects,
const D2D1_RECT_L* pInputOpaqueSubRects,
UINT32 inputRectCount,
D2D1_RECT_L* pOutputRect,
D2D1_RECT_L* pOutputOpaqueSubRect)
{
// This transform only accepts one input, so there will only be one input rect.
if (inputRectCount != 1) {
return E_INVALIDARG;
}
// Set the output rect to the specified rect. This is the whole purpose of this effect.
*pOutputRect = ConvertFloatToLongRect(mOutputRect);
*pOutputOpaqueSubRect = IntersectRect(*pOutputRect, pInputOpaqueSubRects[0]);
return S_OK;
}
IFACEMETHODIMP
ExtendInputEffectD2D1::MapOutputRectToInputRects(const D2D1_RECT_L* pOutputRect,
D2D1_RECT_L* pInputRects,
UINT32 inputRectCount) const
{
if (inputRectCount != 1) {
return E_INVALIDARG;
}
*pInputRects = *pOutputRect;
return S_OK;
}
IFACEMETHODIMP
ExtendInputEffectD2D1::MapInvalidRect(UINT32 inputIndex,
D2D1_RECT_L invalidInputRect,
D2D1_RECT_L* pInvalidOutputRect) const
{
MOZ_ASSERT(inputIndex == 0);
*pInvalidOutputRect = invalidInputRect;
return S_OK;
}
HRESULT
ExtendInputEffectD2D1::Register(ID2D1Factory1 *aFactory)
{
D2D1_PROPERTY_BINDING bindings[] = {
D2D1_VALUE_TYPE_BINDING(L"OutputRect", &ExtendInputEffectD2D1::SetOutputRect, &ExtendInputEffectD2D1::GetOutputRect),
};
HRESULT hr = aFactory->RegisterEffectFromString(CLSID_ExtendInputEffect, kXmlDescription, bindings, 1, CreateEffect);
if (FAILED(hr)) {
gfxWarning() << "Failed to register extend input effect.";
}
return hr;
}
void
ExtendInputEffectD2D1::Unregister(ID2D1Factory1 *aFactory)
{
aFactory->UnregisterEffect(CLSID_ExtendInputEffect);
}
HRESULT __stdcall
ExtendInputEffectD2D1::CreateEffect(IUnknown **aEffectImpl)
{
*aEffectImpl = static_cast<ID2D1EffectImpl*>(new ExtendInputEffectD2D1());
(*aEffectImpl)->AddRef();
return S_OK;
}
}
}
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