Frei0rDev

Topics related to the frei0r plugins project

Adujstment effects

(Guess some code can be taken out of Cinelerra here)

• Brightness/Contrast (*)
• Gaussian Blur (should be fast, 3x3 only)
• Canny edge
• Color Balance
• Hue/Saturation (*)
• Translate
• Rotate
• Scale (Zoom)
• Levels

Already existing:

• Brightness
• Contrast
• Hue
• Saturation
• Invert
• Flip/flop
• Threshold

(*) In most movie editing tools those are combined; in frei0r we got both independently

Compositing effects

We're going to get the 20-some compositing effects out of Gimp (we already did it for Drone).

Alpha channels

We have alpha channels and basic alpha channel operations already implemented in Drone.

• Fill alpha (fill alpha with the same value)
• Set alpha (the alpha channel is given by a mask)
• Invert alpha
• Set opacity (multiplies alpha by some value)
• Over (DONE)
• In (DONE)
• Out (DONE)
• Atop (DONE)
• Xor (DONE)

Transition effects

Those effects make a transition between two images, or between one image and a uniform color. Some of them (like "Blend") can thus be seen as compositing effects. See P.i.D.i.P. for some effects.

• Blend
• Push (first image is "pushing" the second one in one direction)
• Fade in/out (just applies on one image, fade in/out to some color)
• ???

Common utilities

A set of common macros in c. Will be located in common/utils.h.

Macros:

• CLAMP0255(x)
• INT_MULT(a,b,tmp)
• INT_MULT3(a,b,tmp)
• GRAY(x) or lightness(x) ? maybe we could have two choices: fast and precise

Functions:

• uint32_t gray(uint32_t)