ID2D1BitmapRenderTarget interface (d2d1.h)

Renders to an intermediate texture created by the CreateCompatibleRenderTarget method.

Inheritance

The ID2D1BitmapRenderTarget interface inherits from ID2D1RenderTarget. ID2D1BitmapRenderTarget also has these types of members:

• Methods

Methods

The ID2D1BitmapRenderTarget interface has these methods.

Remarks

An ID2D1BitmapRenderTarget writes to an intermediate texture. It's useful for creating patterns for use with an ID2D1BitmapBrush or caching drawing data that will be used repeatedly.

To write directly to a WIC bitmap instead, use the ID2D1Factory::CreateWicBitmapRenderTarget method. This method returns an ID2D1RenderTarget that writes to the specified WIC bitmap.

Creating ID2D1BitmapRenderTarget Objects

Like other render targets, an ID2D1BitmapRenderTarget is a device-dependent resource and must be recreated when the associated device becomes unavailable. For more information, see the Resources Overview.

Examples

The following example uses the CreateCompatibleRenderTarget method to create an ID2D1BitmapRenderTarget and uses it to draw a grid pattern. The grid pattern is used as the source of an ID2D1BitmapBrush.

HRESULT DemoApp::CreateGridPatternBrush(
    ID2D1RenderTarget *pRenderTarget,
    ID2D1BitmapBrush **ppBitmapBrush
    )
{
    // Create a compatible render target.
    ID2D1BitmapRenderTarget *pCompatibleRenderTarget = NULL;
    HRESULT hr = pRenderTarget->CreateCompatibleRenderTarget(
        D2D1::SizeF(10.0f, 10.0f),
        &pCompatibleRenderTarget
        );
    if (SUCCEEDED(hr))
    {
        // Draw a pattern.
        ID2D1SolidColorBrush *pGridBrush = NULL;
        hr = pCompatibleRenderTarget->CreateSolidColorBrush(
            D2D1::ColorF(D2D1::ColorF(0.93f, 0.94f, 0.96f, 1.0f)),
            &pGridBrush
            );
        if (SUCCEEDED(hr))
        {
            pCompatibleRenderTarget->BeginDraw();
            pCompatibleRenderTarget->FillRectangle(D2D1::RectF(0.0f, 0.0f, 10.0f, 1.0f), pGridBrush);
            pCompatibleRenderTarget->FillRectangle(D2D1::RectF(0.0f, 0.1f, 1.0f, 10.0f), pGridBrush);
            pCompatibleRenderTarget->EndDraw();

            // Retrieve the bitmap from the render target.
            ID2D1Bitmap *pGridBitmap = NULL;
            hr = pCompatibleRenderTarget->GetBitmap(&pGridBitmap);
            if (SUCCEEDED(hr))
            {
                // Choose the tiling mode for the bitmap brush.
                D2D1_BITMAP_BRUSH_PROPERTIES brushProperties =
                    D2D1::BitmapBrushProperties(D2D1_EXTEND_MODE_WRAP, D2D1_EXTEND_MODE_WRAP);

                // Create the bitmap brush.
                hr = m_pRenderTarget->CreateBitmapBrush(pGridBitmap, brushProperties, ppBitmapBrush);

                pGridBitmap->Release();
            }

            pGridBrush->Release();
        }

        pCompatibleRenderTarget->Release();
    }

    return hr;
}

The following code example uses the brush to paint a pattern.

// Paint a grid background.
m_pRenderTarget->FillRectangle(
    D2D1::RectF(0.0f, 0.0f, renderTargetSize.width, renderTargetSize.height),
    m_pGridPatternBitmapBrush
    );

Code has been omitted from this example.

Requirements

See also

CreateCompatibleRenderTarget

ID2D1Factory::CreateWicBitmapRenderTarget

ID2D1RenderTarget