framebuffer
GPU-accelerated rendering » Framebuffer objects

Prev:	system-framebuffer
Next:	renderbuffer

Vocabulary
gpu.framebuffers

Class description
Objects of this class represent user-created framebuffer objects. These framebuffer objects provide an offscreen target for rendering operations and can send rendering output either to textures or to dedicated renderbuffer s. A framebuffer consists of a set of one or more color framebuffer-attachment s, an optional depth buffer framebuffer-attachment, and an optional stencil buffer framebuffer-attachment.

Notes
User-created framebuffer objects require OpenGL 3.0 or one of the GL_ARB_framebuffer_object or GL_EXT_framebuffer_object extensions.

See also
<framebuffer>, resize-framebuffer

Definition

USING: arrays gpu ;

IN: gpu.framebuffers

TUPLE: framebuffer < gpu-object
    { color-attachments array read-only initial: { } } {
        depth-attachment
        maybe{ framebuffer-attachment } read-only initial: f
    } {
        stencil-attachment
        maybe{ framebuffer-attachment } read-only initial: f
    } ;

Methods

USING: accessors gpu.framebuffers gpu.framebuffers.private
kernel sequences ;

M: framebuffer (default-attachment-image-type)
    color-attachments>> first attachment-object
    [ component-order>> ] [ component-type>> ] bi ;


USING: gpu.framebuffers gpu.framebuffers.private ;

M: framebuffer (default-attachment-type)
    0 (color-attachment-type) ;


USING: gpu.framebuffers gpu.framebuffers.private kernel
opengl.gl ;

M: framebuffer (default-gl-attachment)
    drop GL_COLOR_ATTACHMENT0 ;


USING: accessors destructors gpu.framebuffers kernel
opengl.framebuffers ;

M: framebuffer dispose
    [ [ delete-framebuffer ] when* f ] change-handle drop ;


USING: accessors gpu.framebuffers gpu.framebuffers.private ;

M: framebuffer framebuffer-handle handle>> ;