Method
GeglBuffersample
Declaration [src]
void
gegl_buffer_sample (
GeglBuffer* buffer,
gdouble x,
gdouble y,
GeglBufferMatrix2* scale,
gpointer dest,
const Babl* format,
GeglSamplerType sampler_type,
GeglAbyssPolicy repeat_mode
)
Description [src]
Query interpolate pixel values at a given coordinate using a specified form of interpolation.
If you intend to take multiple samples, consider using
gegl_buffer_sampler_new() to create a sampler object instead, which is more efficient.
This method is not directly available to language bindings.
Parameters
x-
Type:
gdoubleX coordinate to sample in buffer coordinates.
y-
Type:
gdoubleY coordinate to sample in buffer coordinates.
scale-
Type:
GeglBufferMatrix2A matrix that indicates scaling factors, see gegl_sampler_compute_scale the same.
The data is owned by the caller of the function. dest-
Type:
gpointerBuffer capable of storing one pixel in
format.The argument can be NULL.The data is owned by the caller of the function. format-
Type:
BablThe format to store the sampled color in.
The data is owned by the caller of the function. sampler_type-
Type:
GeglSamplerTypeThe sampler type to use, to be ported from working code. Valid values: GEGL_SAMPLER_NEAREST, GEGL_SAMPLER_LINEAR, GEGL_SAMPLER_CUBIC, GEGL_SAMPLER_NOHALO and GEGL_SAMPLER_LOHALO.
repeat_mode-
Type:
GeglAbyssPolicyHow requests outside the buffer extent are handled. Valid values: GEGL_ABYSS_NONE (abyss pixels are zeroed), GEGL_ABYSS_WHITE (abyss pixels are white), GEGL_ABYSS_BLACK (abyss pixels are black), GEGL_ABYSS_CLAMP (coordinates are clamped to the abyss rectangle), GEGL_ABYSS_LOOP (buffer contents are tiled if outside of the abyss rectangle).