License ?

Hello,

Thanks a lot for all the code sample you share. Just wondering : under which license is everything ? (more precisely : opengl/glfw_webcam_image_process.c file).

To tell you more, I played with opengl/glfw_webcam_image_process.c to horizontaly flip the captured image and I was wondering how to proceed in the case you are interested with the changes. Of course, I can attach a diff , but the code looks not that clean, sorry.

Originaly : I remember the code was not compiling (Linux x86_64 for me), and the gpu shader didn't work (imho) as expected
Now : I modified some coordinates in the fragment shader -program2- and I implemented some uniform value, and now, hit the F key allows to flip/unflip horizontaly in real time what the webcam provides. Just a toy as you can see, but the idea was to show the cpu overload is close to 0%, eating only 22 MB of RAM (640 x 480 at 30fps, GPU , e.g. using Logitech C920). Last but not least, I got other ideas, but I probably will reimplement verything using another code base (SDL2 + ImGui for me)
More information about the renderer : OpenGL version: 4.5 (Core Profile) Mesa 18.0.5; GLSL version: 4.50, Vendor: Intel Open Source Technology Center, Renderer: Mesa DRI Intel(R) UHD Graphics 620 (Kabylake GT2)

Thanks in advance!

--
ericb

Hey Eric,

I've added a GPLv3 LICENSE file.

To tell you more, I played with opengl/glfw_webcam_image_process.c to horizontaly flip the captured image and I was wondering how to proceed in the case you are interested with the changes. Of course, I can attach a diff , but the code looks not that clean, sorry.

flip/unflip horizontaly in real time what the webcam provides. Just a toy as you can see, but the idea was to show the cpu overload is close to 0%, eating only 22 MB of RAM (640 x 480 at 30fps, GPU , e.g. using Logitech C920)

Are you also measuring RAM / CPU usage inside the program itself, or just through an external system monitor?

I would be interested in the following types of changes to glfw_webcam_image_process.c:

add a the flip shader to:

cpp-cheat/opengl/glfw_webcam_image_process.c

Line 148 in 2efb3d6

/*"// Multi-me.\n"*/
interactively switch between CPU / GPU and between different shaders, which currently can only be done on CLI
RAM / CPU resource usage inside program itself

If you think your code does not fit into those, just push it somewhere and post link to it, I'm still curious.

Originaly : I remember the code was not compiling (Linux x86_64 for me), and the gpu shader didn't work (imho) as expected

I tried it out and it seems to work. How did it not work for you more precisely (error message / what is your OS / what did you see on bad shader).

Hi,

License is often a problem, and GPL is not good for me (I would have prefered LGPL at least, or better MIT), but nevermind, I'll rewrite everything I need.

Waiting, and since you are interested, I'll attach the diff (don't forget to add -lGLEW in the makefile, at least on Linux), under MIT License, so you can reuse whatever you want in your code.

The main changes are:

using glew : I'm using Linux, and that's one simple way to use extension (and more recent than 130 glsl)
I corrected the array of vertices, because everything was flipped before (just played with the values, as a game, and found a working solution, that could be wrong ...)
same change in the fragment shader, and the fix gave my the idea to flip in real time
added an uniform value, modified using the keyboard (thus the callback I've added)

Please notice : the attached file has .txt extension, because github does not accept .diff directly. Don't forget to rename it.

I forgot : I'm simply measuring the RAM / CPU load using an external monitor. No clear idea how to measure the GPU load yet ...

Thanks again for your fast answer !

Regards,
ericb

Below, the diff:

webcam_diff.diff.txt