mypaint-surface.h File Reference

#include "mypaint-config.h"
#include "mypaint-rectangle.h"

Go to the source code of this file.

Data Structures
struct	MyPaintSurface
	Abstract surface type for the MyPaint brush engine. More...
struct	MyPaintSurface2
	Extends MyPaintSurface with support for spectral ops and multiple bounding boxes. More...

Typedefs
typedef void(*	MyPaintSurfaceGetColorFunction) (MyPaintSurface *self, float x, float y, float radius, float *color_r, float *color_g, float *color_b, float *color_a)
	Function used to retrieve the average color/alpha from a region of a surface. More...

Typedef Documentation

MyPaintSurfaceGetColorFunction

typedef void(* MyPaintSurfaceGetColorFunction) (MyPaintSurface *self, float x, float y, float radius, float *color_r, float *color_g, float *color_b, float *color_a)

Function used to retrieve the average color/alpha from a region of a surface.

This kind of function calculates the average color/alpha from the pixels of the given surface, selected and weighted respectively by the area and opacity of a uniform dab with a given center and radius.

Parameters

	self	The surface to fetch the pixels from
	x,y	The center of the dab that determine which pixels to include, and their respective impact on the result.
	radius	The radius of the dab.
[out]	color_r,color_g,color_b,color_a	The destination of the resulting colors, range: [0.0, 1.0]