GLFFT Namespace Reference

Classes
class	FFT
struct	Parameters
struct	FFTOptions
	Options for FFT implementation. Defaults for performance as conservative. More...
class	Buffer
class	Texture
class	Program
class	ProgramCache
struct	WisdomPass
struct	FFTStaticWisdom
class	FFTWisdom

Enumerations
enum	Direction { Forward = -1, InverseConvolve = 0, Inverse = 1 }
enum	Mode {   Horizontal, HorizontalDual, Vertical, VerticalDual,   ResolveRealToComplex, ResolveComplexToReal }
enum	Type { ComplexToComplex, ComplexToComplexDual, ComplexToReal, RealToComplex }
enum	Target { SSBO, Image, ImageReal }

Detailed Description

GLFFT doesn't try to preserve GL state in any way. E.g. SHADER_STORAGE_BUFFER bindings, programs bound, texture bindings, etc. Applications calling this library must expect that some GL state will be modified. No rendering state associated with graphics will be modified.

Enumeration Type Documentation

enum GLFFT::Direction

Enumerator
Forward	Forward FFT transform.
InverseConvolve	Inverse FFT transform, but with two inputs (in frequency domain) which are multiplied together for convolution.
Inverse	Inverse FFT transform.

Definition at line 36 of file glfft_common.hpp.

enum GLFFT::Mode

Enumerator
Horizontal
HorizontalDual
Vertical
VerticalDual
ResolveRealToComplex
ResolveComplexToReal

Definition at line 47 of file glfft_common.hpp.

enum GLFFT::Target

Enumerator
SSBO	GL_SHADER_STORAGE_BUFFER.
Image	Textures, when used as output, type is determined by transform type. ComplexToComplex / RealToComplex -> GL_RG16F ComplexToComplexDual -> GL_RGBA16F
ImageReal	Real-valued (single component) textures, when used as output, type is determined by transform type. ComplexToReal -> GL_R32F (because GLES 3.1 doesn't have GL_R16F image type).

Definition at line 71 of file glfft_common.hpp.

enum GLFFT::Type

Enumerator
ComplexToComplex	Regular complex-to-complex transform.
ComplexToComplexDual	Complex-to-complex dual transform where the complex value is four-dimensional, i.e. a vector of two complex values. Typically used to transform RGBA data.
ComplexToReal	Complex-to-real transform. N / 2 + 1 complex values are used per row with a stride of N complex samples.
RealToComplex	Real-to-complex transform. N / 2 + 1 complex output samples are created per row with a stride of N complex samples.

Definition at line 58 of file glfft_common.hpp.