[Spice-devel] jpeg and jpeg_alpha in spice

[Shuxiang Lim]

Ok,
 I've found a simple way in gcc manual, just disable all optimization option
in gcc by "-O0" will help this,but I'm not sure whether it's the final
solution.
 Rgrds.

On Wed, May 4, 2011 at 10:33 AM, Shuxiang Lim <shohyanglim at gmail.com> wrote:

> Hi,Alon!
>   Thanks,but now I decide to abandon such drudgery try of forcing use JPEG
> in spice-server because it's not a friendly reasonable way to spice. Now all
> that I can do currently is just attempting to fasten the image traffic
> between libspicec.so and Java UI,all the sins come from the android
> framework and Java for there is no way to access directly the image buffer
> in mem maintained by libspicec.so from Java. The only hope will be
> file-mem-mapping between C and Java, but that will never give me any
> surprise,I suppose.
>   Besides,another reason that enticed me to force use of JPEG is the
> common/quic.c in client is damned buggy of SIGBUS on android/ARM on some ops
> such as pointer typecasting.
>   That's common in my porting work,for example,in generated_demashaller.c,
> this
> *#define write_int8(ptr, val) *(int8_t *)(ptr) = val*
>   will cause SIGBUS on ARM, so I change it into
> *#define write_int8(ptr,v)  {int8_t val=v;memcpy(ptr,&val,sizeof(int8_t));
> }*
>   then it's safe, but seems ugly and clumsy.
> So, is there any simple,elegant and safe way to do this?
>   Best regards.
>
>
>
>
>
> On Tue, May 3, 2011 at 11:40 PM, Alon Levy <alevy at redhat.com> wrote:
>
>> On Tue, May 03, 2011 at 11:48:59AM +0800, Shuxiang Lim wrote:
>> > Hi,All!
>>
>> Hi Shuxiang,
>>
>>  AFAIK you can't avoid non jpeg images because most (all?) rendering
>> operations still happen
>>  on the client, so it can't or/xor/move with mask an 'almost' bitmap.
>>
>>  But the person who wrote this code should be back on the list next week,
>> so if you can
>>  wait until then you should get a better answer.
>>
>> Alon
>>
>> >    I've found a problem that when
>> > 1. using qxl,thus the image type will be SPICE_BITMAP_FMT_RGBA;
>> > 2. and forcing the use of red_jpeg_compress_image ('cause I want to get
>> only
>> > JPEG in client) in spice server
>> >    then SPICE_IMAGE_TYPE_JPEG_ALPHA will be produced,but this will cause
>> the
>> > color disorder in the dest image in client.
>> >    Normally,spice will use quic_compress or lz_compress for
>> > SPICE_BITMAP_FMT_RGBA, so SPICE_IMAGE_TYPE_JPEG_ALPHA will never be
>> used, Am
>> > I right? So why did we define SPICE_IMAGE_TYPE_JPEG_ALPHA? How can I
>> produce
>> > only NORMAL SPICE_IMAGE_TYPE_JPEG for SPICE_BITMAP_FMT_RGBA?
>> >   Best Regards.
>>
>> > _______________________________________________
>> > Spice-devel mailing list
>> > Spice-devel at lists.freedesktop.org
>> > http://lists.freedesktop.org/mailman/listinfo/spice-devel
>>
>>
>
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