Re: [PATCH] windowscodecs: Implement WICCreateBitmapFromSection.

[Hans Leidekker]

On Thu, 2018-03-15 at 20:31 +0800, Dmitry Timoshkov wrote:
> +HRESULT WINAPI WICCreateBitmapFromSectionEx(UINT width, UINT height,
> -
>    REFWICPixelFormatGUID format, HANDLE section, UINT stride,
> -
>    UINT offset, WICSectionAccessLevel wicaccess, IWICBitmap **bitmap)
>
> +{
> - DWORD access;
> - void *buffer;
> - HRESULT hr;
> -
> - TRACE("%u,%u,%s,%p,%u,%#x,%#x,%p\n", width, height, debugstr_guid(format),
> -
>    section, stride, offset, wicaccess, bitmap);
> -
> - if (!width || !height || !section || !bitmap) return E_INVALIDARG;
> -
> - switch (wicaccess)
> - {
> - case WICSectionAccessLevelReadWrite:
> -
>    access = FILE_MAP_READ | FILE_MAP_WRITE;
> -
>    break;
> -
> - case WICSectionAccessLevelRead:
> -
>    access = FILE_MAP_READ;
> -
>    break;
> -
> - default:
> -
>    FIXME("unsupported access %#x\n", wicaccess);
> -
>    return E_INVALIDARG;
> - }
> -
> - buffer = MapViewOfFile(section, access, 0, offset, 0);
> - if (!buffer) return HRESULT_FROM_WIN32(GetLastError());

MapViewOfFile wants a multiple of the allocation granularity for the
offset. Does WICCreateBitmapFromSectionEx have the same constraint?