Re: [PATCH v3 1/3] d2d1: Implement ID2D1Bitmap1::Map().

[Dmitry Timoshkov]

Nikolay Sivov  wrote:
> I started by extending tests from patch 3/3, and I'm curious now how 
> does your application create such bitmap?
>
> Is it just 
> ID2D1DeviceContext::CreateBitmap(D2D1_BITMAP_OPTIONS_CANNOT_DRAW | 
> D2D1_BITMAP_OPTIONS_CPU_READ), or something more complicated?
>
> How is this bitmap used later? Is it set to an image brush, and then 
> used for fills?

The application first creates a bitmap with D2D1_BITMAP_OPTIONS_TARGET,
then creates an image brush from it. Then the app creates another bitmap
with D2D1_BITMAP_OPTIONS_CANNOT_DRAW | D2D1_BITMAP_OPTIONS_CPU_READ, copies
contents from original bitmap with ::CopyFromBitmap() and then ::Map()s it
with D2D1_MAP_OPTIONS_READ.