If ask Internet about how to “load PNG from resource” it gives in return a lot of examples using a bunch of code. We can use some stuff found there, but once using MFC and enabling Direct2D support, that becomes easier: just have to construct and create a CD2DBitmap object, passing the resource ID and the resource type.
Here is an example:
Create a CD2DBitmap object from a PNG resource
HRESULT CSomeWindow::LoadDemoImage(CHwndRenderTarget* pRenderTarget)
{
// Load Direct2D bitmap from "PNG" resource
m_pBitmamLogo = new CD2DBitmap(pRenderTarget,
IDB_PNG_DEMO, // resource ID
_T("PNG")); // resource type
return m_pBitmamLogo->Create(pRenderTarget);
}It’s also possible to easily load a Direct2D brush.
Create a CD2DBitmapBrush object from a PNG resource
HRESULT CSomeWindow::LoadDemoBrush(CHwndRenderTarget* pRenderTarget)
{
// Load Direct2D brush from "PNG" resource
m_pBrushBackground = new CD2DBitmapBrush(pRenderTarget,
IDB_PNG_DEMO, // resource ID
_T("PNG"), // resource type
CD2DSizeU(0, 0),
&D2D1::BitmapBrushProperties(D2D1_EXTEND_MODE_WRAP,
D2D1_EXTEND_MODE_WRAP));
return m_pBrushBackground->Create(pRenderTarget);
}
Notes
- Loading PNG is just an example. We can load other WIC-supported formats (includes “standard” formats like JPEG, TIFF etc. and other graphic formats which have a WIC decoder installed).
- To see how to enable Direct2D support and further render the loaded images, see the previous articles and/or have a look in the demo application attached here.
Demo application
Download: PNG Resource Loading Demo.zip (53)
PNG Resource Loading Demo