GLTexture2< TEXTURE_TYPE > Class Template Reference

Detailed Description

template<GLenum TEXTURE_TYPE>
class cy::GLTexture2< TEXTURE_TYPE >

OpenGL 2D texture class.

This class provides a convenient interface for handling 2D texture operations with OpenGL. The template argument TEXTURE_TYPE should be a 2D texture type supported by OpenGL, such as GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE, or GL_TEXTURE_1D_ARRAY. This class merely stores the texture id. Note that deleting an object of this class does not automatically delete the texture from the GPU memory. You must explicitly call the Delete() method to free the texture storage on the GPU.

#include <cyGL.h>

Inheritance diagram for GLTexture2< TEXTURE_TYPE >:

Public Member Functions
void	SetImage (GLenum textureFormat, GLenum dataFormat, GLenum dataType, void const *data, GLsizei width, GLsizei height, int level=0)
	Sets the texture image using the given texture format, data format, and data type.
template<typename T >
void	SetImage (GLenum textureFormat, GLenum dataFormat, T const *data, GLsizei width, GLsizei height, int level=0)
	Sets the texture image using the given texture format and data format. The data type is determined by the data pointer type.
template<typename T >
void	SetImage (GL::Type textureType, T const *data, int numChannels, GLsizei width, GLsizei height, int level=0)
	Sets the texture image using the given texture type. The data format and type are determined by the data pointer type and the number of channels. The texture format is determined by the texture type and the number of channels.
template<typename T >
void	SetImage (T const *data, int numChannels, GLsizei width, GLsizei height, int level=0)
	Sets the texture image. The texture format uses the matching data pointer type. If GLubyte (unsigned char) is used, the texture uses 8-bit normalized values. If GLushort (unsigned short) is used, the texture uses 16-bit normalized values. If GLfloat (float) is used, the texture uses non-normalized 32-bit float values. If GLbyte, GLshort, GLint, or GLuint is used, the texture uses non-normalized 8-bit, 16-bit, or 32-bit integer values.
template<typename T >
void	SetImageRGBA (GL::Type textureType, T const *data, GLsizei width, GLsizei height, int level=0)
	Sets the texture image with 4 channels.
template<typename T >
void	SetImageRGB (GL::Type textureType, T const *data, GLsizei width, GLsizei height, int level=0)
	Sets the texture image with 3 channels.
template<typename T >
void	SetImageRG (GL::Type textureType, T const *data, GLsizei width, GLsizei height, int level=0)
	Sets the texture image with 2 channels.
template<typename T >
void	SetImageR (GL::Type textureType, T const *data, GLsizei width, GLsizei height, int level=0)
	Sets the texture image with 1 channel.
template<typename T >
void	SetImageRGBA (T const *data, GLsizei width, GLsizei height, int level=0)
	Sets the texture image with 4 channels.
template<typename T >
void	SetImageRGB (T const *data, GLsizei width, GLsizei height, int level=0)
	Sets the texture image with 3 channels.
template<typename T >
void	SetImageRG (T const *data, GLsizei width, GLsizei height, int level=0)
	Sets the texture image with 2 channels.
template<typename T >
void	SetImageR (T const *data, GLsizei width, GLsizei height, int level=0)
	Sets the texture image with 1 channel.
void	SetWrappingMode (GLenum wrapS, GLenum wrapT)
	Sets the texture wrapping parameter. The acceptable values are GL_REPEAT, GL_MIRRORED_REPEAT, GL_CLAMP, and GL_CLAMP_TO_BORDER. If the wrap argument is zero, the corresponding wrapping parameter is not changed.
General Methods
void	Delete ()
	Deletes the texture.
GLuint	GetID () const
	Returns the texture ID.
bool	IsNull () const
	Returns true if the OpenGL texture object is not generated, i.e. the texture id is invalid.
void	Bind () const
	Binds the texture to the current texture unit.
void	Bind (int textureUnit) const
	Binds the texture to the given texture unit.
GLenum	Type () const
	Deletes the texture.
Texture Creation and Initialization
void	Initialize ()
	Generates the texture, only if the texture has not been previously generated. Initializes the texture sampling parameters.
void	BuildMipmaps ()
	Builds mipmap levels for the texture. The texture image must be set first.
void	SetFilteringMode (GLenum magnificationFilter, GLenum minificationFilter)
	Sets the texture filtering mode. The acceptable values are GL_NEAREST and GL_LINEAR. The minification filter values can also be GL_NEAREST_MIPMAP_NEAREST, GL_LINEAR_MIPMAP_NEAREST, GL_NEAREST_MIPMAP_LINEAR, or GL_LINEAR_MIPMAP_LINEAR. If the filter argument is zero, the corresponding filter parameter is not changed.
void	SetAnisotropy (float anisotropy)
	Sets the anisotropy level of the texture. The anisotropy value of 1 disables anisotropic filtering. Larger values provide provide better anisotropic filtering.
void	SetMaxAnisotropy ()
	Sets anisotropic filtering to the maximum permissible value.
void	SetNoAnisotropy ()
	Turns off anisotropic filtering.