BLI_math_interp.hh File Reference

#include "BLI_math_base.h"
#include "BLI_math_base.hh"
#include "BLI_math_vector_types.hh"

Go to the source code of this file.

Namespaces
namespace	blender
namespace	blender::math

Macros
#define	EWA_MAXIDX   255

Typedefs
using	ewa_filter_read_pixel_cb = void (*)(void *userdata, int x, int y, float result[4])

Enumerations
enum class	blender::math::InterpWrapMode { blender::math::Extend , blender::math::Repeat , blender::math::Border }

Functions
void	blender::math::interpolate_nearest_border_byte (const uchar *buffer, uchar *output, int width, int height, float u, float v)
uchar4uchar4	blender::math::interpolate_nearest_border_byte (const uchar *buffer, int width, int height, float u, float v)
void	blender::math::interpolate_nearest_border_fl (const float *buffer, float *output, int width, int height, int components, float u, float v)
float4	blender::math::interpolate_nearest_border_fl (const float *buffer, int width, int height, float u, float v)
void	blender::math::interpolate_nearest_byte (const uchar *buffer, uchar *output, int width, int height, float u, float v)
uchar4uchar4	blender::math::interpolate_nearest_byte (const uchar *buffer, int width, int height, float u, float v)
void	blender::math::interpolate_nearest_fl (const float *buffer, float *output, int width, int height, int components, float u, float v)
float4	blender::math::interpolate_nearest_fl (const float *buffer, int width, int height, float u, float v)
void	blender::math::interpolate_nearest_wrap_byte (const uchar *buffer, uchar *output, int width, int height, float u, float v)
uchar4uchar4	blender::math::interpolate_nearest_wrap_byte (const uchar *buffer, int width, int height, float u, float v)
void	blender::math::interpolate_nearest_wrap_fl (const float *buffer, float *output, int width, int height, int components, float u, float v)
float4	blender::math::interpolate_nearest_wrap_fl (const float *buffer, int width, int height, float u, float v)
void	blender::math::interpolate_nearest_wrapmode_fl (const float *buffer, float *output, int width, int height, int components, float u, float v, InterpWrapMode wrap_u, InterpWrapMode wrap_v)
uchar4uchar4	blender::math::interpolate_bilinear_border_byte (const uchar *buffer, int width, int height, float u, float v)
float4	blender::math::interpolate_bilinear_border_fl (const float *buffer, int width, int height, float u, float v)
void	blender::math::interpolate_bilinear_border_fl (const float *buffer, float *output, int width, int height, int components, float u, float v)
uchar4uchar4	blender::math::interpolate_bilinear_byte (const uchar *buffer, int width, int height, float u, float v)
float4	blender::math::interpolate_bilinear_fl (const float *buffer, int width, int height, float u, float v)
void	blender::math::interpolate_bilinear_fl (const float *buffer, float *output, int width, int height, int components, float u, float v)
uchar4uchar4	blender::math::interpolate_bilinear_wrap_byte (const uchar *buffer, int width, int height, float u, float v)
float4	blender::math::interpolate_bilinear_wrap_fl (const float *buffer, int width, int height, float u, float v)
void	blender::math::interpolate_bilinear_wrapmode_fl (const float *buffer, float *output, int width, int height, int components, float u, float v, InterpWrapMode wrap_u, InterpWrapMode wrap_v)
uchar4uchar4	blender::math::interpolate_cubic_bspline_byte (const uchar *buffer, int width, int height, float u, float v)
float4	blender::math::interpolate_cubic_bspline_fl (const float *buffer, int width, int height, float u, float v)
void	blender::math::interpolate_cubic_bspline_fl (const float *buffer, float *output, int width, int height, int components, float u, float v)
void	blender::math::interpolate_cubic_bspline_wrapmode_fl (const float *buffer, float *output, int width, int height, int components, float u, float v, InterpWrapMode wrap_u, InterpWrapMode wrap_v)
uchar4uchar4	blender::math::interpolate_cubic_mitchell_byte (const uchar *buffer, int width, int height, float u, float v)
float4	blender::math::interpolate_cubic_mitchell_fl (const float *buffer, int width, int height, float u, float v)
void	blender::math::interpolate_cubic_mitchell_fl (const float *buffer, float *output, int width, int height, int components, float u, float v)
void	BLI_ewa_imp2radangle (float A, float B, float C, float F, float *a, float *b, float *th, float *ecc)
void	BLI_ewa_filter (int width, int height, bool intpol, bool use_alpha, const float uv[2], const float du[2], const float dv[2], ewa_filter_read_pixel_cb read_pixel_cb, void *userdata, float result[4])

Variables
const float	EWA_WTS [EWA_MAXIDX+1]

Detailed Description

2D image sampling with filtering functions.

All functions take (u, v) texture coordinate, non-normalized (i.e. ranging from (0,0) to (width,height) over the image).

Any filtering done on texel values just blends them without color space or gamma conversions.

For sampling float images, there are "fully generic" functions that take arbitrary image channel counts, and arbitrary texture coordinate wrapping modes. However if you do not need full flexibility, use less generic functions, they will be faster (e.g. #interpolate_nearest_border_fl is faster than #interpolate_nearest_wrapmode_fl).

Definition in file BLI_math_interp.hh.

Macro Definition Documentation

EWA_MAXIDX

#define EWA_MAXIDX   255

Definition at line 354 of file BLI_math_interp.hh.

Referenced by BLI_ewa_filter(), and feline_eval().

Typedef Documentation

ewa_filter_read_pixel_cb

using ewa_filter_read_pixel_cb = void (*)(void *userdata, int x, int y, float result[4])

Definition at line 357 of file BLI_math_interp.hh.

Function Documentation

BLI_ewa_filter()

void BLI_ewa_filter	(	int	width,
		int	height,
		bool	intpol,
		bool	use_alpha,
		const float	uv[2],
		const float	du[2],
		const float	dv[2],
		ewa_filter_read_pixel_cb	read_pixel_cb,
		void *	userdata,
		float	result[4] )

TODO(sergey): Consider making this function inlined, so the pixel read callback could also be inlined in order to avoid per-pixel function calls.

Definition at line 843 of file math_interp.cc.

References A, B, b, BLI_ewa_imp2radangle(), C, ceilf, EWA_MAXIDX, EWA_WTS, F, floorf, madd_v3_v3fl(), mul_v3_fl(), radangle2imp(), result, sqrtf, U, UNUSED_VARS, V, v, v2, and zero_v4().

Referenced by ewa_eval(), blender::compositor::Result::sample_ewa_extended(), and blender::compositor::Result::sample_ewa_zero().

BLI_ewa_imp2radangle()

void BLI_ewa_imp2radangle	(	float	A,
		float	B,
		float	C,
		float	F,
		float *	a,
		float *	b,
		float *	th,
		float *	ecc )

Definition at line 813 of file math_interp.cc.

References A, atan2f, B, b, C, F, M_PI, and sqrtf.

Referenced by BLI_ewa_filter(), and imagewraposa_aniso().

Variable Documentation

EWA_WTS

const float EWA_WTS[EWA_MAXIDX+1]

extern

Definition at line 762 of file math_interp.cc.

Referenced by BLI_ewa_filter(), and feline_eval().