HRESULT graphics::brush::RadialGradientBrush::CreateDeviceDependentResource(
ID2D1RenderTarget *pRenderTarget,
const D2D1_RECT_F &rect,
FLOAT opacity)
{
HRESULT hr = S_OK;
CComPtr<ID2D1GradientStopCollection> gradientStopCollection;
CHK_FATAL_HRESULT(pRenderTarget->CreateGradientStopCollection(
&m_gradientStops.front(),
static_cast<UINT>(m_gradientStops.size()),
D2D1_GAMMA_2_2,
D2D1_EXTEND_MODE_CLAMP,
&gradientStopCollection));
D2D1_POINT_2F center;
D2D1_POINT_2F offset;
FLOAT radiusX, radiusY;
_CalculateParameters(rect, center, offset, radiusX, radiusY);
m_brush = nullptr;
CHK_FATAL_HRESULT(
pRenderTarget->CreateRadialGradientBrush(
D2D1::RadialGradientBrushProperties(
D2D1::Point2F(0, 0),
offset,
radiusX,
radiusY
),
D2D1::BrushProperties(opacity,
D2D1::Matrix3x2F::Translation(center.x, center.y)),
gradientStopCollection,
&m_brush
));
m_deviceDependentResourceCreated = (m_brush != nullptr);
return hr;
}
ID2D1Brush *graphics::brush::RadialGradientBrush::GetBrush(const D2D1_RECT_F &rect, FLOAT opacity) {
if (m_brush != nullptr) {
D2D1_POINT_2F center;
D2D1_POINT_2F offset;
FLOAT radiusX, radiusY;
_CalculateParameters(rect, center, offset, radiusX, radiusY);
m_brush->SetCenter(D2D1::Point2F(0, 0));
m_brush->SetGradientOriginOffset(offset);
m_brush->SetRadiusX(radiusX);
m_brush->SetRadiusY(radiusY);
m_brush->SetTransform(D2D1::Matrix3x2F::Translation(center.x, center.y));
m_brush->SetOpacity(opacity);
return m_brush;
} else {
throw std::runtime_error("brush has not been created");
}
}
