[Spice-devel] Client Graphics Filtering

[Yonit Halperin]

On 04/25/2012 08:32 AM, Noel Van Hook wrote:
> If I recall my windows drivers correctly, I don't think the driver
> even knows what application owns the buffer it is drawing into.
> 
IIUC, the implementation involves guest components that track down the
relevant bitmaps.

Yonit.
> Noel
> 
> On Tue, Apr 24, 2012 at 11:43 AM, Yonit Halperin<yhalperi at redhat.com>  wrote:
>> Hi,
>>
>> On 04/24/2012 09:12 AM, Alon Levy wrote:
>>>
>>> On Tue, Apr 24, 2012 at 09:47:47AM +0800, 蒋媛园 wrote:
>>>>
>>>>   Hi
>>>>     I want to filter the graphics to the client. For example, only the
>>>> graphics of a calculator(in guest OS Win7) are send to the client.
>>>>     I know that there is always the possibility of falling all the way
>>>> back to CPU drawing to a memory bitmap which is then copied to the client.
>>>>     Now, I have filtered the drawing commands on device-managed surfaces
>>>> which belong to some app.exe. However I don't know how to control the
>>>> engine-managed surfaces, namely those pre-rendered bitmaps. I didn't find
>>>> related code in QXL driver.
>>>>     Could you please give me some advice? I really need some help.
>>>>
>> I'm not sure I understand exactly what you mean. I guess that by
>> engine-managed, you mean gdi bitmaps? When the destination of a drawing
>> operation is a gdi bitmap, the client doesn't know about this operation. The
>> driver renders the src* of the operation if needed (if it is a device
>> managed bitmap), copies the relevant src area to a new gdi bitmap, and
>> fallback to a Gdi call, with the "copied src" and original dest.
>> If the destination is a device managed bitmap, and the src* is a gdi managed
>> bitmap, the gdi bitmap is copied to the device memory, and the corresponding
>> qxl drawing command is sent to the server together with the reference to the
>> copied bitmap.
>>
>> * There can be multiple references to bitmaps in one qxl command
>> (src/mask/brush), and each one can be a bitmap (gdi/device)
>>
>> Regards,
>> Yonit.
>>>
>>>
>>> Great to hear someone is working on this, I don't have an answer though,
>>> Yonit, any idea maybe?
>>>
>>>>
>>>> Thanks in advance
>>>>   Best Regards!
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> 网易Lofter，专注兴趣，分享创作！
>>>
>>>
>>
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> 
> 
>