[Lazarus] Get JPEG from TAChart in CGI app

[michael.vancanneyt at wisa.be]

On Mon, 21 Mar 2011, Mattias Gaertner wrote:

> On Mon, 21 Mar 2011 21:49:38 +1000
> Alexander Klenin <klenin at gmail.com> wrote:
>
>> On Mon, Mar 21, 2011 at 21:04, Mattias Gaertner
>> <nc-gaertnma at netcologne.de> wrote:
>>> On Mon, 21 Mar 2011 11:25:12 +0100 (CET)
>>> michael.vancanneyt at wisa.be wrote:
>>>
>>> Why?
>>> AFAIK in cgi you can not use the hardware acceleration.
>>
>> Because color manupulation in 16-bit depth may be slower than in 8-bit,
>> and because even withouh acceleration, OS drawing functions may be much
>> better optimized then FPPCanvas ones.
>
> Maybe, maybe not.
> In case of gtk I doubt that *many* functions are much faster.
> In my measurements the difference between 16 vs 8bit was not
> big. It made a big difference if your bitmap is 16bit. I recommend to
> not use the default fp memory image. Writing a 8bit is easy. It would
> be nice if fpimage would provide some other memory image
> implementations. For example 8bit RGB, RGBA and
> Grayscale.

Good idea, I can easily add these.

Michael.