cairo-pattern {RGtk2}R Documentation

cairo_pattern_t

Description

Sources for drawing

Methods and Functions

cairoPatternAddColorStopRgb(pattern, offset, red, green, blue)
cairoPatternAddColorStopRgba(pattern, offset, red, green, blue, alpha)
cairoPatternGetColorStopCount(pattern)
cairoPatternGetColorStopRgba(pattern, index)
cairoPatternCreateRgb(red, green, blue)
cairoPatternCreateRgba(red, green, blue, alpha)
cairoPatternGetRgba(pattern)
cairoPatternCreateForSurface(surface)
cairoPatternGetSurface(pattern)
cairoPatternCreateLinear(x0, y0, x1, y1)
cairoPatternGetLinearPoints(pattern)
cairoPatternCreateRadial(cx0, cy0, radius0, cx1, cy1, radius1)
cairoPatternGetRadialCircles(pattern)
cairoPatternStatus(pattern)
cairoPatternSetExtend(pattern, extend)
cairoPatternGetExtend(pattern)
cairoPatternSetFilter(pattern, filter)
cairoPatternGetFilter(pattern)
cairoPatternSetMatrix(pattern, matrix)
cairoPatternGetMatrix(pattern, matrix)
cairoPatternGetType(pattern)
cairoPatternSetUserData(pattern, key, user.data)
cairoPatternGetUserData(pattern, key)
cairoPattern(red, green, blue, alpha, surface, x0, y0, x1, y1, cx0, cy0, radius0, cx1, cy1, radius1)

Detailed Description

CairoPattern is the paint with which cairo draws. The primary use of patterns is as the source for all cairo drawing operations, although they can also be used as masks, that is, as the brush too.

A cairo pattern is created by using one of the many constructors, of the form cairo_pattern_create_type() or implicitly through cairo_set_source_type() functions.

Structures

CairoPattern

A CairoPattern represents a source when drawing onto a surface. There are different subtypes of CairoPattern, for different types of sources; for example, cairoPatternCreateRgb creates a pattern for a solid opaque color.

Other than various cairo_pattern_create_type() functions, some of the pattern types can be implicitly created using various cairo_set_source_type() functions; for example cairoSetSourceRgb.

The type of a pattern can be queried with cairoPatternGetType.

Memory management of CairoPattern is done with cairoPatternReference() and cairoPatternDestroy().

Convenient Construction

cairoPattern is the result of collapsing the constructors of cairo_pattern_t (cairoPatternCreateRgb, cairoPatternCreateRgba, cairoPatternCreateForSurface, cairoPatternCreateLinear, cairoPatternCreateRadial) and accepts a subset of its arguments matching the required arguments of one of its delegate constructors.

Enums and Flags

Author(s)

Derived by RGtkGen from GTK+ documentation

References

http://www.cairographics.org/manual/cairo-pattern.html


[Package RGtk2 version 2.20.21 Index]