[Laszlo-dev] Master sprite implementation

[Max Carlson]

There are definitely some improvements to be made.  In particular, 
single-frame resources should be able to use the master sprite.

Can you file a bug/improvement about the issue where Puffin1.png is 
loaded?  That shouldn't be happening.

The master sprite image is preloaded once by the canvas/root sprite, 
which may be why you're seeing it loading, followed by Puffin1.  Thanks 
again, as always!

Regards,
Max Carlson
OpenLaszlo.org

On 2/1/10 12:34 AM, Raju Bitter wrote:
> I did a bit of testing with the master sprite functionality in DHTML,
> that's great! I did a test with 4 images, here's the source code:
>
> <canvas width="100%" height="800" bgcolor="black">
> <!-- Take a few resources -->
> <resource name="p1" src="Puffin1.png" />
> <resource name="p2" src="Puffin2.png" />
> <resource name="p3" src="Puffin3.png" />
> <resource name="p4" src="Puffin4.png" />
> <resource name="p5" src="Puffin5.png" />
>
>
> <view x="20" y="20">
> <simplelayout axis="x" spacing="50" />
> <view resource="p1" />
> <view resource="p2" />
> <view resource="p3" />
> <view resource="p4" />
> <view resource="p5" />
>
>
> </view>
> </canvas>
>
> The master sprite image is generated as imagesprite.sprite.png and
> contains all 5 PNG files, but the first image Puffin1.png is still
> downloaded as a separate file. Inspecting the HTML I can see that the
> view with resource p1 is still using the single Puffin1.png using an
> image tag, although that's part of the master sprite.
>
> Another interesting thing is that the request is first started to
> download the master sprite, and then the single image is downloaded. Is
> that a feature?
>
> But besides the technical questions, that's a great functionality which
> is going to speed up many large DHTML apps!
>
> - Raju
>