gl_texture_image Struct Reference

#include <mtypes.h>

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Detailed Description

Texture image state.

Describes the dimensions of a texture image, the texel format and pointers to Texel Fetch functions.

Data Fields
GLenum	_BaseFormat
	Either GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY, GL_COLOR_INDEX, GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT only.
GLint	InternalFormat
	Internal format as given by the user.
GLuint	Border
	0 or 1
GLuint	Width
	= 2^WidthLog2 + 2*Border
GLuint	Height
	= 2^HeightLog2 + 2*Border
GLuint	Depth
	= 2^DepthLog2 + 2*Border
GLuint	Width2
	= Width - 2*Border
GLuint	Height2
	= Height - 2*Border
GLuint	Depth2
	= Depth - 2*Border
GLuint	WidthLog2
	= log2(Width2)
GLuint	HeightLog2
	= log2(Height2)
GLuint	DepthLog2
	= log2(Depth2)
GLuint	MaxLog2
	= MAX(WidthLog2, HeightLog2)
GLfloat	WidthScale
	used for mipmap LOD computation
GLfloat	HeightScale
	used for mipmap LOD computation
GLfloat	DepthScale
	used for mipmap LOD computation
GLboolean	IsClientData
	Data owned by client?
GLboolean	_IsPowerOfTwo
	Are all dimensions powers of two?
struct gl_texture_format *	TexFormat
struct gl_texture_object *	TexObject
	Pointer back to parent object.
FetchTexelFuncC	FetchTexelc
	GLchan texel fetch function pointer.
FetchTexelFuncF	FetchTexelf
	Float texel fetch function pointer.
GLboolean	IsCompressed
	GL_ARB_texture_compression.
GLuint	CompressedSize
	GL_ARB_texture_compression.
GLuint	RowStride
	Padded width in units of texels.
GLuint *	ImageOffsets
	if 3D texture: array [Depth] of offsets to each 2D slice in 'Data', in texels
GLvoid *	Data
	Image data, accessed via FetchTexel().
For device driver:
void *	DriverData
	Arbitrary device driver data.

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Field Documentation

GLenum gl_texture_image::_BaseFormat

Either GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY, GL_COLOR_INDEX, GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT only.

Used for choosing TexEnv arithmetic.

GLint gl_texture_image::InternalFormat

Internal format as given by the user.

GLuint gl_texture_image::Border

0 or 1

GLuint gl_texture_image::Width

= 2^WidthLog2 + 2*Border

GLuint gl_texture_image::Height

= 2^HeightLog2 + 2*Border

GLuint gl_texture_image::Depth

= 2^DepthLog2 + 2*Border

GLuint gl_texture_image::Width2

= Width - 2*Border

GLuint gl_texture_image::Height2

= Height - 2*Border

GLuint gl_texture_image::Depth2

= Depth - 2*Border

GLuint gl_texture_image::WidthLog2

= log2(Width2)

GLuint gl_texture_image::HeightLog2

= log2(Height2)

GLuint gl_texture_image::DepthLog2

= log2(Depth2)

GLuint gl_texture_image::MaxLog2

= MAX(WidthLog2, HeightLog2)

GLfloat gl_texture_image::WidthScale

used for mipmap LOD computation

GLfloat gl_texture_image::HeightScale

used for mipmap LOD computation

GLfloat gl_texture_image::DepthScale

used for mipmap LOD computation

GLboolean gl_texture_image::IsClientData

Data owned by client?

GLboolean gl_texture_image::_IsPowerOfTwo

Are all dimensions powers of two?

struct gl_texture_format* gl_texture_image::TexFormat [read]

struct gl_texture_object* gl_texture_image::TexObject [read]

Pointer back to parent object.

FetchTexelFuncC gl_texture_image::FetchTexelc

GLchan texel fetch function pointer.

FetchTexelFuncF gl_texture_image::FetchTexelf

Float texel fetch function pointer.

GLboolean gl_texture_image::IsCompressed

GL_ARB_texture_compression.

GLuint gl_texture_image::CompressedSize

GL_ARB_texture_compression.

GLuint gl_texture_image::RowStride

Padded width in units of texels.

GLuint* gl_texture_image::ImageOffsets

if 3D texture: array [Depth] of offsets to each 2D slice in 'Data', in texels

GLvoid* gl_texture_image::Data

Image data, accessed via FetchTexel().

void* gl_texture_image::DriverData

Arbitrary device driver data.

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The documentation for this struct was generated from the following file:

• mtypes.h

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