How to redraw only a part of a morph

> Hi!
>
> I try to optimize the graphic framework I'm porting.
> I have good performance but I have some problem to reDraw the morph of my view.
>
> When I reDraw my morph I use 'invalidRect:' with the bound of the part
> I want to reDraw but every step my morph is entirely reDraw.
>
> Does I have to use another method? Or someone can explain me how pharo
> manage the repaint of morph?
>

> On 28 March 2013 12:05, Tristan Bourgois <[hidden email]> wrote:
>> Hi!
>>
>> I try to optimize the graphic framework I'm porting.
>> I have good performance but I have some problem to reDraw the morph of my view.
>>
>> When I reDraw my morph I use 'invalidRect:' with the bound of the part
>> I want to reDraw but every step my morph is entirely reDraw.
>>
>> Does I have to use another method? Or someone can explain me how pharo
>> manage the repaint of morph?
>>
> The thing you looking for called clipping.
> Usually (and if possible) morph should try and detect what parts of his drawing
> needs to be updated and update only minimum part covered by clipping region.
> But that implies some internal knowledge about morph's geometry etc..
> and that's why a default implementation simply (re)draws everything.
>
>> Thanks :)
>>
>> I will ask today if I can make a video of my work because is very
>> impressive of what we can do on Pharo with the framework!
>>
> Please do.
>
>> And if the reDraw is functional we certainly have the same performance
>> with Pharo!
>>
> Come to see me and we will look how we can optimize it :)
>
>> So good news :)
>>
>> Tristan
>>
>
>
>
> --
> Best regards,
> Igor Stasenko.
>

> On 28 March 2013 12:05, Tristan Bourgois <[hidden email]> wrote:
>> Hi!
>>
>> I try to optimize the graphic framework I'm porting.
>> I have good performance but I have some problem to reDraw the morph of my view.
>>
>> When I reDraw my morph I use 'invalidRect:' with the bound of the part
>> I want to reDraw but every step my morph is entirely reDraw.
>>
>> Does I have to use another method? Or someone can explain me how pharo
>> manage the repaint of morph?
>>
> The thing you looking for called clipping.
> Usually (and if possible) morph should try and detect what parts of his drawing
> needs to be updated and update only minimum part covered by clipping region.
> But that implies some internal knowledge about morph's geometry etc..
> and that's why a default implementation simply (re)draws everything.
>

>> Thanks :)
>>
>> I will ask today if I can make a video of my work because is very
>> impressive of what we can do on Pharo with the framework!
>>
> Please do.
>
>> And if the reDraw is functional we certainly have the same performance
>> with Pharo!
>>
> Come to see me and we will look how we can optimize it :)

>> So good news :)
>>
>> Tristan
>>
>
>
>
> --
> Best regards,
> Igor Stasenko.
>

> 2013/3/28 Igor Stasenko <[hidden email]>:
>> On 28 March 2013 12:05, Tristan Bourgois <[hidden email]> wrote:
>>> Hi!
>>>
>>> I try to optimize the graphic framework I'm porting.
>>> I have good performance but I have some problem to reDraw the morph of my view.
>>>
>>> When I reDraw my morph I use 'invalidRect:' with the bound of the part
>>> I want to reDraw but every step my morph is entirely reDraw.
>>>
>>> Does I have to use another method? Or someone can explain me how pharo
>>> manage the repaint of morph?
>>>
>> The thing you looking for called clipping.
>> Usually (and if possible) morph should try and detect what parts of his drawing
>> needs to be updated and update only minimum part covered by clipping region.
>> But that implies some internal knowledge about morph's geometry etc..
>> and that's why a default implementation simply (re)draws everything.
>>
> Ok I simulate the clip in updating my canvas with 'copyClipRect: myClip'
> This is functional and improve a LOT the performance :)
>
> I juste have to make some refactoring with some event and animation
> which have some bad behavior for the redrawing
> and I have to see if copyClipRect: is not a bad method to use.
>
>>> Thanks :)
>>>
>>> I will ask today if I can make a video of my work because is very
>>> impressive of what we can do on Pharo with the framework!
>>>
>> Please do.
>>
>>> And if the reDraw is functional we certainly have the same performance
>>> with Pharo!
>>>
>> Come to see me and we will look how we can optimize it :)
>
> For the moment it's a bit difficult to ask help for the framework
> because it's a Thalès license...