GLRenderTexture< TEXTURE_TYPE > Class Template Reference

Detailed Description

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

OpenGL render color buffer.

This class provides a convenient interface for texture rendering in OpenGL with a color texture buffer.

#include <cyGL.h>

Inheritance diagram for GLRenderTexture< TEXTURE_TYPE >:

Public Member Functions
Render Buffer Creation and Initialization
bool	Initialize (bool useDepthBuffer)
	Generates the render buffer. Returns true if the render buffer is ready.
bool	Initialize (bool useDepthBuffer, int numChannels, GLsizei width, GLsizei height, GL::Type type=GL::TYPE_UBYTE)
	Generates the render buffer and sets its size. Returns true if the render buffer is ready and complete.
bool	Resize (int numChannels, GLsizei width, GLsizei height, GL::Type type=GL::TYPE_UBYTE)
	Initializes or changes the size of the render buffer. Returns true if the buffer is complete.
General Methods
void	Delete ()
	Deletes the render buffer.
GLuint	GetID () const
	Returns the frame buffer ID.
bool	IsNull () const
	Returns true if the render buffer is not initialized, i.e. the render buffer id is invalid.
void	Bind () const
	Binds the frame buffer for rendering and adjusts the viewport accordingly.
void	Unbind () const
	Binds the frame buffer that was used before this frame buffer was bound and reverts the viewport.
bool	IsReady () const
	Returns true if the frame buffer is ready. This method can be called after initialization.
bool	IsComplete () const
	Returns true if the render buffer is complete.

Protected Attributes
GLuint	framebufferID
	The frame-buffer ID.
GLuint	depthbufferID
	The depth-buffer ID.
GLTexture2< TEXTURE_TYPE >	texture
	The buffer texture.
GLsizei	bufferWidth
	The width of the frame buffer.
GLsizei	bufferHeight
	The height of the frame buffer.
GLint	prevBufferID
	Temporary storage for previous frame-buffer used before binding this buffer.
GLint	prevViewport [4]
	Temporary storage for the size and position of the previous frame-buffer used before binding this buffer.

Texture Methods
GLuint	GetTextureID () const
	Returns the texture ID.
void	BindTexture () const
	Binds the texture to the current texture unit.
void	BindTexture (int textureUnit) const
	Binds the texture to the given texture unit.
void	BuildTextureMipmaps ()
	Builds mipmap levels for the texture.
void	SetTextureWrappingMode (GLenum wrapS, GLenum wrapT)
	Sets the wrapping parameter for the texture. 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.
void	SetTextureFilteringMode (GLenum magnificationFilter=0, GLenum minificationFilter=0)
	Sets the filtering mode for the texture. 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	SetTextureAnisotropy (float anisotropy)
	Sets the anisotropy level of the texture.
void	SetTextureMaxAnisotropy ()
	Sets anisotropic filtering to the maximum permissible value.
void	SetTextureNoAnisotropy ()
	Turns off anisotropic filtering.
void	GenerateBuffer ()
	Generates the frame buffer and initializes the texture.
void	SetSize (GLsizei width, GLsizei height)
	Sets the size of the frame buffer.