Tag Archives: c++

Use & Create TheGimp header file format

Gimp header file format
Gimp header file format

For sure not a lot of people is using “save as .h” capability in TheGimp. But this is a really easy to use solution when you want to embed some icons or image into a C/C++ source code. I used this functionality with Arduino to display graphical elements and I was convinced of it.

I also reused this format to transfer an image over Bluetooth as this format have the advantage to encode RGB values into printable characters. The format is not too much expensive as 3x8bits RGB values are encoded with 4 chars.

This post gives detail on this encoding and a procedure example to encode your bitmap into this format. The decoding procedure is given by TheGimp in the .h file itself.

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Makefile quick how-to

Many years ago, I was considering myself as a specialist of Makefiles … But now, I know that Makefile science is not like bicycle and you may loose all this knowledge as soon as you start to java Code …

So I’ve to go back to Makefile school again and here are some of my googling notes on this topic for my own remembers and why not yours !

 

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Mosquitto C++ sample code to publish message

I start using mosquitto in a C++ program and I think documentation could be a little bit improved by some examples. To use mosquitto, there is a mosquittopp class acting as a wrapper on top of the mosquitto lib. Basically to create your own program you have to herit from that one and it is easy then.

Mosquitto lib can be managed as a thread or directly by calling the different sub function. In my point of view the thread approach is the better as otherwize you have to manage connection / disconnection manually. Mosquitto lib is then event managed, so you can subscribe to the callback event by surcharging the existing function.

Here is an exemple for a program just needing to publish messages to a broker.

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