happy-turtle / camera-filters

Various image effects and filters. GLSL shaders created with the app ShaderEditor.

Image-Effects

Various image effects and filters. GLSL shaders created with the app ShaderEditor.

Chromatic Aberration	Sepia Grain	Grayscale	Kaleidoscope	Glitch

Aspect Ratio

My phone's camera has a different aspect ratio than the display resolution. That is why I added the following three lines in most of the shaders to add black borders at the top and bottom:

[...]
float aspectRatio = 18.5 / 16.0;
[...]
st.x = st.x * aspectRatio +
  (1.0 - aspectRatio) / 2.0;
[...]
//crop image to aspect ratio of the camera
col = col * step(st.x, 1.0) * step(0.0, st.x);