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Bug 1617396 - Implement conic-gradient for Direct2D graphics backend.…
… r=gfx-reviewers,nical Differential Revision: https://phabricator.services.mozilla.com/D66305
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Mohamed H
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Oct 8, 2020
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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/. */ | ||
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#include "ConicGradientEffectD2D1.h" | ||
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#include "Logging.h" | ||
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#include "ShadersD2D1.h" | ||
#include "HelpersD2D.h" | ||
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#include <vector> | ||
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#define TEXTW(x) L##x | ||
#define XML(X) \ | ||
TEXTW(#X) // This macro creates a single string from multiple lines of text. | ||
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static const PCWSTR kXmlDescription = | ||
XML( | ||
<?xml version='1.0'?> | ||
<Effect> | ||
<!-- System Properties --> | ||
<Property name='DisplayName' type='string' value='ConicGradientEffect'/> | ||
<Property name='Author' type='string' value='Mozilla'/> | ||
<Property name='Category' type='string' value='Pattern effects'/> | ||
<Property name='Description' type='string' value='This effect is used to render CSS conic gradients.'/> | ||
<Inputs> | ||
<Input name='Geometry'/> | ||
</Inputs> | ||
<Property name='StopCollection' type='iunknown'> | ||
<Property name='DisplayName' type='string' value='Gradient stop collection'/> | ||
</Property> | ||
<Property name='Center' type='vector2'> | ||
<Property name='DisplayName' type='string' value='Gradient center'/> | ||
</Property> | ||
<Property name='Angle' type='vector2'> | ||
<Property name='DisplayName' type='string' value='Gradient angle'/> | ||
</Property> | ||
<Property name='StartOffset' type='float'> | ||
<Property name='DisplayName' type='string' value='Start stop offset'/> | ||
</Property> | ||
<Property name='EndOffset' type='float'> | ||
<Property name='DisplayName' type='string' value='End stop offset'/> | ||
</Property> | ||
<Property name='Transform' type='matrix3x2'> | ||
<Property name='DisplayName' type='string' value='Transform applied to the pattern'/> | ||
</Property> | ||
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</Effect> | ||
); | ||
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// {091fda1d-857e-4b1e-828f-1c839d9b7897} | ||
static const GUID GUID_SampleConicGradientPS = { | ||
0x091fda1d, | ||
0x857e, | ||
0x4b1e, | ||
{0x82, 0x8f, 0x1c, 0x83, 0x9d, 0x9b, 0x78, 0x97}}; | ||
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namespace mozilla { | ||
namespace gfx { | ||
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ConicGradientEffectD2D1::ConicGradientEffectD2D1() | ||
: mRefCount(0), | ||
mCenter(D2D1::Vector2F(0, 0)), | ||
mAngle(0), | ||
mStartOffset(0), | ||
mEndOffset(0), | ||
mTransform(D2D1::IdentityMatrix()) | ||
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{} | ||
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IFACEMETHODIMP | ||
ConicGradientEffectD2D1::Initialize(ID2D1EffectContext* pContextInternal, | ||
ID2D1TransformGraph* pTransformGraph) { | ||
HRESULT hr; | ||
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hr = pContextInternal->LoadPixelShader(GUID_SampleConicGradientPS, | ||
SampleConicGradientPS, | ||
sizeof(SampleConicGradientPS)); | ||
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if (FAILED(hr)) { | ||
return hr; | ||
} | ||
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hr = pTransformGraph->SetSingleTransformNode(this); | ||
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if (FAILED(hr)) { | ||
return hr; | ||
} | ||
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mEffectContext = pContextInternal; | ||
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return S_OK; | ||
} | ||
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IFACEMETHODIMP | ||
ConicGradientEffectD2D1::PrepareForRender(D2D1_CHANGE_TYPE changeType) { | ||
if (changeType == D2D1_CHANGE_TYPE_NONE) { | ||
return S_OK; | ||
} | ||
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// We'll need to inverse transform our pixel, precompute inverse here. | ||
Matrix mat = ToMatrix(mTransform); | ||
if (!mat.Invert()) { | ||
// Singular | ||
return S_OK; | ||
} | ||
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if (!mStopCollection) { | ||
return S_OK; | ||
} | ||
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HRESULT hr = mDrawInfo->SetPixelShader(GUID_SampleConicGradientPS); | ||
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if (FAILED(hr)) { | ||
return hr; | ||
} | ||
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RefPtr<ID2D1ResourceTexture> tex = CreateGradientTexture(); | ||
hr = mDrawInfo->SetResourceTexture(1, tex); | ||
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if (FAILED(hr)) { | ||
return hr; | ||
} | ||
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struct PSConstantBuffer { | ||
float center[2]; | ||
float angle; | ||
float start_offset; | ||
float end_offset; | ||
float repeat_correct; | ||
float allow_odd; | ||
float padding[1]; | ||
float transform[8]; | ||
}; | ||
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PSConstantBuffer buffer = { | ||
{mCenter.x, mCenter.y}, | ||
mAngle, | ||
mStartOffset, | ||
mEndOffset, | ||
mStopCollection->GetExtendMode() != D2D1_EXTEND_MODE_CLAMP ? 1.0f : 0.0f, | ||
mStopCollection->GetExtendMode() == D2D1_EXTEND_MODE_MIRROR ? 1.0f : 0.0f, | ||
{0.0f}, | ||
{mat._11, mat._21, mat._31, 0.0f, mat._12, mat._22, mat._32, 0.0f}}; | ||
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hr = mDrawInfo->SetPixelShaderConstantBuffer((BYTE*)&buffer, sizeof(buffer)); | ||
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if (FAILED(hr)) { | ||
return hr; | ||
} | ||
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return S_OK; | ||
} | ||
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IFACEMETHODIMP | ||
ConicGradientEffectD2D1::SetGraph(ID2D1TransformGraph* pGraph) { | ||
return pGraph->SetSingleTransformNode(this); | ||
} | ||
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IFACEMETHODIMP_(ULONG) | ||
ConicGradientEffectD2D1::AddRef() { return ++mRefCount; } | ||
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IFACEMETHODIMP_(ULONG) | ||
ConicGradientEffectD2D1::Release() { | ||
if (!--mRefCount) { | ||
delete this; | ||
return 0; | ||
} | ||
return mRefCount; | ||
} | ||
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IFACEMETHODIMP | ||
ConicGradientEffectD2D1::QueryInterface(const IID& aIID, void** aPtr) { | ||
if (!aPtr) { | ||
return E_POINTER; | ||
} | ||
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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; | ||
} | ||
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static_cast<IUnknown*>(*aPtr)->AddRef(); | ||
return S_OK; | ||
} | ||
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IFACEMETHODIMP | ||
ConicGradientEffectD2D1::MapInputRectsToOutputRect( | ||
const D2D1_RECT_L* pInputRects, const D2D1_RECT_L* pInputOpaqueSubRects, | ||
UINT32 inputRectCount, D2D1_RECT_L* pOutputRect, | ||
D2D1_RECT_L* pOutputOpaqueSubRect) { | ||
if (inputRectCount != 1) { | ||
return E_INVALIDARG; | ||
} | ||
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*pOutputRect = *pInputRects; | ||
*pOutputOpaqueSubRect = *pInputOpaqueSubRects; | ||
return S_OK; | ||
} | ||
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IFACEMETHODIMP | ||
ConicGradientEffectD2D1::MapOutputRectToInputRects( | ||
const D2D1_RECT_L* pOutputRect, D2D1_RECT_L* pInputRects, | ||
UINT32 inputRectCount) const { | ||
if (inputRectCount != 1) { | ||
return E_INVALIDARG; | ||
} | ||
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*pInputRects = *pOutputRect; | ||
return S_OK; | ||
} | ||
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IFACEMETHODIMP | ||
ConicGradientEffectD2D1::MapInvalidRect(UINT32 inputIndex, | ||
D2D1_RECT_L invalidInputRect, | ||
D2D1_RECT_L* pInvalidOutputRect) const { | ||
MOZ_ASSERT(inputIndex == 0); | ||
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*pInvalidOutputRect = invalidInputRect; | ||
return S_OK; | ||
} | ||
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IFACEMETHODIMP | ||
ConicGradientEffectD2D1::SetDrawInfo(ID2D1DrawInfo* pDrawInfo) { | ||
mDrawInfo = pDrawInfo; | ||
return S_OK; | ||
} | ||
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HRESULT | ||
ConicGradientEffectD2D1::Register(ID2D1Factory1* aFactory) { | ||
D2D1_PROPERTY_BINDING bindings[] = { | ||
D2D1_VALUE_TYPE_BINDING(L"StopCollection", | ||
&ConicGradientEffectD2D1::SetStopCollection, | ||
&ConicGradientEffectD2D1::GetStopCollection), | ||
D2D1_VALUE_TYPE_BINDING(L"Center", &ConicGradientEffectD2D1::SetCenter, | ||
&ConicGradientEffectD2D1::GetCenter), | ||
D2D1_VALUE_TYPE_BINDING(L"Angle", &ConicGradientEffectD2D1::SetAngle, | ||
&ConicGradientEffectD2D1::GetAngle), | ||
D2D1_VALUE_TYPE_BINDING(L"StartOffset", | ||
&ConicGradientEffectD2D1::SetStartOffset, | ||
&ConicGradientEffectD2D1::GetStartOffset), | ||
D2D1_VALUE_TYPE_BINDING(L"EndOffset", | ||
&ConicGradientEffectD2D1::SetEndOffset, | ||
&ConicGradientEffectD2D1::GetEndOffset), | ||
D2D1_VALUE_TYPE_BINDING(L"Transform", | ||
&ConicGradientEffectD2D1::SetTransform, | ||
&ConicGradientEffectD2D1::GetTransform)}; | ||
HRESULT hr = aFactory->RegisterEffectFromString( | ||
CLSID_ConicGradientEffect, kXmlDescription, bindings, ARRAYSIZE(bindings), | ||
CreateEffect); | ||
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if (FAILED(hr)) { | ||
gfxWarning() << "Failed to register radial gradient effect."; | ||
} | ||
return hr; | ||
} | ||
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void ConicGradientEffectD2D1::Unregister(ID2D1Factory1* aFactory) { | ||
aFactory->UnregisterEffect(CLSID_ConicGradientEffect); | ||
} | ||
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HRESULT __stdcall ConicGradientEffectD2D1::CreateEffect( | ||
IUnknown** aEffectImpl) { | ||
*aEffectImpl = static_cast<ID2D1EffectImpl*>(new ConicGradientEffectD2D1()); | ||
(*aEffectImpl)->AddRef(); | ||
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return S_OK; | ||
} | ||
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HRESULT | ||
ConicGradientEffectD2D1::SetStopCollection(IUnknown* aStopCollection) { | ||
if (SUCCEEDED(aStopCollection->QueryInterface( | ||
(ID2D1GradientStopCollection**)getter_AddRefs(mStopCollection)))) { | ||
return S_OK; | ||
} | ||
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return E_INVALIDARG; | ||
} | ||
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already_AddRefed<ID2D1ResourceTexture> | ||
ConicGradientEffectD2D1::CreateGradientTexture() { | ||
std::vector<D2D1_GRADIENT_STOP> rawStops; | ||
rawStops.resize(mStopCollection->GetGradientStopCount()); | ||
mStopCollection->GetGradientStops(&rawStops.front(), rawStops.size()); | ||
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std::vector<unsigned char> textureData; | ||
textureData.resize(4096 * 4); | ||
unsigned char* texData = &textureData.front(); | ||
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float prevColorPos = 0; | ||
float nextColorPos = rawStops[0].position; | ||
D2D1_COLOR_F prevColor = rawStops[0].color; | ||
D2D1_COLOR_F nextColor = prevColor; | ||
uint32_t stopPosition = 1; | ||
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// Not the most optimized way but this will do for now. | ||
for (int i = 0; i < 4096; i++) { | ||
// The 4095 seems a little counter intuitive, but we want the gradient | ||
// color at offset 0 at the first pixel, and at offset 1.0f at the last | ||
// pixel. | ||
float pos = float(i) / 4095; | ||
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while (pos > nextColorPos) { | ||
prevColor = nextColor; | ||
prevColorPos = nextColorPos; | ||
if (rawStops.size() > stopPosition) { | ||
nextColor = rawStops[stopPosition].color; | ||
nextColorPos = rawStops[stopPosition++].position; | ||
} else { | ||
nextColorPos = 1.0f; | ||
} | ||
} | ||
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float interp; | ||
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if (nextColorPos != prevColorPos) { | ||
interp = (pos - prevColorPos) / (nextColorPos - prevColorPos); | ||
} else { | ||
interp = 0; | ||
} | ||
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DeviceColor newColor(prevColor.r + (nextColor.r - prevColor.r) * interp, | ||
prevColor.g + (nextColor.g - prevColor.g) * interp, | ||
prevColor.b + (nextColor.b - prevColor.b) * interp, | ||
prevColor.a + (nextColor.a - prevColor.a) * interp); | ||
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// Note D2D expects RGBA here!! | ||
texData[i * 4] = (char)(255.0f * newColor.r); | ||
texData[i * 4 + 1] = (char)(255.0f * newColor.g); | ||
texData[i * 4 + 2] = (char)(255.0f * newColor.b); | ||
texData[i * 4 + 3] = (char)(255.0f * newColor.a); | ||
} | ||
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RefPtr<ID2D1ResourceTexture> tex; | ||
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UINT32 width = 4096; | ||
UINT32 stride = 4096 * 4; | ||
D2D1_RESOURCE_TEXTURE_PROPERTIES props; | ||
// Older shader models do not support 1D textures. So just use a width x 1 | ||
// texture. | ||
props.dimensions = 2; | ||
UINT32 dims[] = {width, 1}; | ||
props.extents = dims; | ||
props.channelDepth = D2D1_CHANNEL_DEPTH_4; | ||
props.bufferPrecision = D2D1_BUFFER_PRECISION_8BPC_UNORM; | ||
props.filter = D2D1_FILTER_MIN_MAG_MIP_LINEAR; | ||
D2D1_EXTEND_MODE extendMode[] = {mStopCollection->GetExtendMode(), | ||
mStopCollection->GetExtendMode()}; | ||
props.extendModes = extendMode; | ||
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HRESULT hr = mEffectContext->CreateResourceTexture( | ||
nullptr, &props, &textureData.front(), &stride, 4096 * 4, | ||
getter_AddRefs(tex)); | ||
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if (FAILED(hr)) { | ||
gfxWarning() << "Failed to create resource texture: " << hexa(hr); | ||
} | ||
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return tex.forget(); | ||
} | ||
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} // namespace gfx | ||
} // namespace mozilla |
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