Creating images using LUA

[Puppeteer]

I’m wondering if anyone has experience with building a bitmapped image using LUA.

To explain the application, Kurzweil K series synths have a graphics dump command.
It returns a pixel value from the graphics layer for every pixel on the screen. They are returned as each pixel being the last 6 pixels of each byte. It’s essentially a 1 bit (black/white) bitmap.

64 rows of 240 columns of pixels.

I want to display the screen in Ctrlr with the parameters over the top. A lot of screens on the K2600 rely on the graphics to make sense of them, and the rest, just coz they look good.

I can write all the values as hex or a big binary string, and it seems like there are a few graphics options though the rending demo no longer works on windows (Paint throws an error).

Essentially I’m looking at building a front panel replica as a short term solution rather than building a full blown editor (which requires reverse engineering massive sysex dumps).

Basically I want to know how to take the pixel states and create an image in Ctrlr that I can update on demand.

Thanks in advance everyone.

• This topic was modified 3 years, 1 month ago by Puppeteer.

The Puppeteer
http://godlike.com.au

[dnaldoog]

Hi Puppeteer

Can you explain this in more detail? Give an example of the sysex?

Puppeteer wrote:

They are returned as each pixel being the last 6 pixels of each byte. It’s essentially a 1 bit (black/white) bitmap.

I think the idea is to take a 64 x 240 multidimensional array and map each 1 to a black pixel and each 0 to a white pixel? Is that about right.

You would use a uiComponent and place a 1 x 1 black png or g:fillRect() ?? in each ‘on’ state – See attached panel for the basic idea.

• This reply was modified 3 years, 1 month ago by dnaldoog.
• This reply was modified 3 years, 1 month ago by dnaldoog. Reason: added download
• This reply was modified 3 years, 1 month ago by dnaldoog.

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[Tedjuh]

Is fillRectList supported by Ctrlr? Because Juce says:

FillRectList()
If you have a lot of rectangles to draw, it may be more efficient to create a RectangleList and use this method than to call fillRect() multiple times.

In my opinion, it’s easier to translate to a multidimensional array too.

Just wondering, because I think that Ctrlr doesn’t get happy when you throw 15.360 png’s at it. |I know it can handle that many rectangles though (cough, arpeggiator, cough).

[dnaldoog]

Hi Tedjuh,

I don’t think RectangleList is supported.

This attached panel would probably give the OP a starting point.

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[Tedjuh]

Could you post two dumps? One for the “GETGRAPHICS” or 18h command and one for the “SCREENREPLY” or 19h command? And a picture of the screen at the time the command is done?

The text and parameter names and values won’t be a big problem because those are just ascii representation. I think the graphics are for the “faders” and other things that need to be drawn.

It would help to find a solution to your problem.

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