BGRA Controls

[circular]

Congratulations!

[circular]

Ahah I like that gameboy filter 

If I may, you can optimise it by not dividing by 3 and do the case with the numbers multiplied by 3.

It is also possible to reduce the number of comparisons by first checking if the value is above or below the middle, and then in each case to check if it is the lower or higher quarter.

[lainz]

Thanks, i've seen on internet, tried with Corel Photopaint, worked, then programmed 

You have svn access to this repository, i've improved it but can't figure how to improve multiply by 3 instead of div (changed the values, but doesn't look good)

I don't know how to programm dithering, maybe is easy for you to understand.
http://en.wikipedia.org/wiki/Dither#Algorithms

I've already used Threshold, is the same as GameBoy filter.

For the GameBoy filter the best seems to be Bayer matrix or "void-and-cluster", it looks like old video-games.

For photos, everything else.

[circular]

About the multiplication by 3, to do this, simply remove the "div 3", and then when checking the value, use the values multiplied by 3. So if it was 128, then it becomes 128*3.

About dithering, I always thought it was too complicated for me. However now that I read the Floyd-Steinberg dithering page on wikipedia, it seems to be rather simple. Well, when I have got some time, I might implement dithering in BGRABitmap.

[lainz]

About the multiplication by 3, to do this, simply remove the "div 3", and then when checking the value, use the values multiplied by 3. So if it was 128, then it becomes 128*3.

About dithering, I always thought it was too complicated for me. However now that I read the Floyd-Steinberg dithering page on wikipedia, it seems to be rather simple. Well, when I have got some time, I might implement dithering in BGRABitmap.

Yeah the problem was I did not change the data from byte to integer.

Yeah does not seem hard the Floyd-Steinberg dithering, I will try too.

[Mike.Cornflake]

Hi guys :-)   This has nothing to do with BGRA-Controls, but everyone in here seems to be graphics savvy :-)

Any chance one of you guys can check the TCanvas.AngleArc patch in http://bugs.freepascal.org/view.php?id=7290 and let us know if it's good?   

Looks good to me, but I don't really know what I'm looking at :-)

[lainz]

Hi guys :-)   This has nothing to do with BGRA-Controls, but everyone in here seems to be graphics savvy :-)

Any chance one of you guys can check the TCanvas.AngleArc patch in http://bugs.freepascal.org/view.php?id=7290 and let us know if it's good?   

Looks good to me, but I don't really know what I'm looking at :-)

Sorry I have no idea.

In BGRA-Controls SVN:
- Added GameBoy, GameBoyDithering and BlackAndWhiteDithering filters in BCFilters.
- Added pix2svg in test_extra: a tool to convert from bitmap to a map of rectangles, ellipses or hexagons stored in a svg file (maybe is usefull for artists only).

[lainz]

Added BCTileMap, a unit to load .ini tile map files. Currently it support loading and editing at runtime, but I will add save feature quickly.

Added test_bctilemap, a project that opens a .ini tile map and draw into a BGRAVirtualScreen, and also support for 'painting' selecting the Tile ID in a combobox and then changing the map with the mouse (the most basic code in order to start a map editor).

[riad02]

HI,
About bgra controls.
I create an instance of this library.
the question is what should I do and what I should not do?

[lainz]

HI,
About bgra controls.
I create an instance of this library.
the question is what should I do and what I should not do?

If you solve bugs or make improvements you can share patch files here and we can apply them and it will remain in the same library, that you can use for commercial or non-comercial use.

If you do modifications of the library, basically you must: keep as software library, add to the files the changes you made, license for free, provide 'functional' source code.

I don't know if modify is the same as, for example, create inherited classes from the objects in the library..

PD: We must update to LGPL v3?

LGPL v2:

Code: [Select]

  2. You may modify your copy or copies of the Library or any portion
of it, thus forming a work based on the Library, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:

    a) The modified work must itself be a software library.

    b) You must cause the files modified to carry prominent notices
    stating that you changed the files and the date of any change.

    c) You must cause the whole of the work to be licensed at no
    charge to all third parties under the terms of this License.

    d) If a facility in the modified Library refers to a function or a
    table of data to be supplied by an application program that uses
    the facility, other than as an argument passed when the facility
    is invoked, then you must make a good faith effort to ensure that,
    in the event an application does not supply such function or
    table, the facility still operates, and performs whatever part of
    its purpose remains meaningful.

    (For example, a function in a library to compute square roots has
    a purpose that is entirely well-defined independent of the
    application.  Therefore, Subsection 2d requires that any
    application-supplied function or table used by this function must
    be optional: if the application does not supply it, the square
    root function must still compute square roots.)

[riad02]

Sorry, I do not modify but create a derived class from the library without the slightest change.

About modifying, I've made ​​a little change on bcimagebutton. because if it is not modified hover state is not lost when modal show on the button.

So, how do I send these changes?

[lainz]

Ok if you don't modify the library you don't need to do anything.

If you're using SVN you can make a patch, or just upload the modified pas file here, since there is no other change in bcimagebutton we can see the changes easily.

[riad02]

 Yappss,
Means I may make a derived class.
and I could use the library derived for commercial and non-commercial? 
If I change the library I'll tell you. Thank you ..


I changed in this section

Code: [Select]

procedure TBCCustomImageButton.DoMouseUp;
var
  Ctrl : TControl;
begin
  FFade.Mode := fmFadeIn;


  if Animation then
    FFade.Step := 20
  else
    FFade.Step := 255;


  Ctrl := Application.GetControlAtMouse;
  if Ctrl = Self then
    DoMouseEnter
  else
    DoMouseLeave;


  inherited DoMouseUp;
end;

[lainz]

Yappss,
Means I may make a derived class.
and I could use the library derived for commercial and non-commercial? 
If I change the library I'll tell you. Thank you ..

Thanks for the patch. About a derived class I have no idea I will ask here:
http://forum.lazarus.freepascal.org/index.php/topic,26009.0.html

[CM630]

I cannot find a control in BGRAControls which can show GIF files. Is there such one?