Files
react-native-svg/windows/RNSVG/LinearGradientView.cpp
Marlene Cota f88532d195 [Windows] Port to Direct2D to remove win2d dependency (#2052)
This change removes the win2d (Direct2D wrapper) dependency by using D2D directly. This removes the manual step of adding the win2d to any new react-native-windows projects that want to use react-native-svg. It is also a stepping stone to an easier Fabric implementation for windows.
2023-11-14 11:33:19 +01:00

94 lines
3.2 KiB
C++

#include "pch.h"
#include "LinearGradientView.h"
#include "LinearGradientView.g.cpp"
#include "Utils.h"
using namespace winrt;
using namespace Microsoft::ReactNative;
namespace winrt::RNSVG::implementation {
void LinearGradientView::UpdateProperties(IJSValueReader const &reader, bool forceUpdate, bool invalidate) {
const JSValueObject &propertyMap{JSValue::ReadObjectFrom(reader)};
for (auto const &pair : propertyMap) {
auto const &propertyName{pair.first};
auto const &propertyValue{pair.second};
if (propertyName == "x1") {
m_x1 = SVGLength::From(propertyValue);
} else if (propertyName == "y1") {
m_y1 = SVGLength::From(propertyValue);
} else if (propertyName == "x2") {
m_x2 = SVGLength::From(propertyValue);
} else if (propertyName == "y2") {
m_y2 = SVGLength::From(propertyValue);
} else if (propertyName == "gradient") {
m_stops = Utils::JSValueAsStops(propertyValue);
} else if (propertyName == "gradientUnits") {
m_gradientUnits = Utils::JSValueAsBrushUnits(propertyValue);
} else if (propertyName == "gradientTransform") {
m_transform = Utils::JSValueAsD2DTransform(propertyValue);
if (propertyValue.IsNull()) {
m_transform = D2D1::Matrix3x2F::Identity();
}
}
}
__super::UpdateProperties(reader, forceUpdate, invalidate);
SaveDefinition();
}
void LinearGradientView::Unload() {
m_stops.clear();
__super::Unload();
}
void LinearGradientView::CreateBrush() {
auto const root{SvgRoot()};
com_ptr<ID2D1DeviceContext> deviceContext{get_self<D2DDeviceContext>(root.DeviceContext())->Get()};
winrt::com_ptr<ID2D1GradientStopCollection> stopCollection;
winrt::check_hresult(deviceContext->CreateGradientStopCollection(&m_stops[0], static_cast<uint32_t>(m_stops.size()), stopCollection.put()));
Size size{static_cast<float>(root.ActualWidth()), static_cast<float>(root.ActualHeight())};
D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES brushProperties;
brushProperties.startPoint = {0, 0};
brushProperties.endPoint = {size.Width, size.Height};
winrt::com_ptr<ID2D1LinearGradientBrush> linearBrush;
winrt::check_hresult(deviceContext->CreateLinearGradientBrush(brushProperties, stopCollection.get(), linearBrush.put()));
SetPoints(linearBrush.get(), {0, 0, size.Width, size.Height});
linearBrush->SetTransform(m_transform);
m_brush = make<RNSVG::implementation::D2DBrush>(linearBrush.as<ID2D1Brush>());
}
void LinearGradientView::UpdateBounds() {
if (m_gradientUnits == "objectBoundingBox") {
com_ptr<ID2D1LinearGradientBrush> brush{get_self<D2DBrush>(m_brush)->Get().as<ID2D1LinearGradientBrush>()};
SetPoints(brush.get(), m_bounds);
}
}
void LinearGradientView::SetPoints(ID2D1LinearGradientBrush * brush, D2D1_RECT_F bounds) {
float width{D2DHelpers::WidthFromD2DRect(bounds)};
float height{D2DHelpers::HeightFromD2DRect(bounds)};
float x1{Utils::GetAbsoluteLength(m_x1, width) + bounds.left};
float y1{Utils::GetAbsoluteLength(m_y1, height) + bounds.top};
float x2{Utils::GetAbsoluteLength(m_x2, width) + bounds.left};
float y2{Utils::GetAbsoluteLength(m_y2, height) + bounds.top};
brush->SetStartPoint({x1, y1});
brush->SetEndPoint({x2, y2});
}
} // namespace winrt::RNSVG::implementation