extra/opengl/framebuffers/framebuffers.factor

   1 ! Copyright (C) 2008 Joe Groff.
   2 ! See http://factorcode.org/license.txt for BSD license.
   3 USING: opengl opengl.gl combinators continuations kernel
   4 alien.c-types ;
   5 IN: opengl.framebuffers
   6
   7 : gen-framebuffer ( -- id )
   8     [ glGenFramebuffersEXT ] (gen-gl-object) ;
   9 : gen-renderbuffer ( -- id )
  10     [ glGenRenderbuffersEXT ] (gen-gl-object) ;
  11
  12 : delete-framebuffer ( id -- )
  13     [ glDeleteFramebuffersEXT ] (delete-gl-object) ;
  14 : delete-renderbuffer ( id -- )
  15     [ glDeleteRenderbuffersEXT ] (delete-gl-object) ;
  16
  17 : framebuffer-incomplete? ( -- status/f )
  18     GL_FRAMEBUFFER_EXT glCheckFramebufferStatusEXT
  19     dup GL_FRAMEBUFFER_COMPLETE_EXT = f rot ? ;
  20
  21 : framebuffer-error ( status -- * )
  22     {
  23         { GL_FRAMEBUFFER_COMPLETE_EXT [ "framebuffer complete" ] }
  24         { GL_FRAMEBUFFER_UNSUPPORTED_EXT [ "framebuffer configuration unsupported" ] }
  25         { GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT [ "framebuffer incomplete (incomplete attachment)" ] }
  26         { GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT [ "framebuffer incomplete (missing attachment)" ] }
  27         { GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT [ "framebuffer incomplete (dimension mismatch)" ] }
  28         { GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT [ "framebuffer incomplete (format mismatch)" ] }
  29         { GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT [ "framebuffer incomplete (draw buffer(s) have no attachment)" ] }
  30         { GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT [ "framebuffer incomplete (read buffer has no attachment)" ] }
  31         [ drop gl-error "unknown framebuffer error" ]
  32     } case throw ;
  33
  34 : check-framebuffer ( -- )
  35     framebuffer-incomplete? [ framebuffer-error ] when* ;
  36
  37 : with-framebuffer ( id quot -- )
  38     GL_FRAMEBUFFER_EXT rot glBindFramebufferEXT
  39     [ GL_FRAMEBUFFER_EXT 0 glBindFramebufferEXT ] [ ] cleanup ; inline
  40
  41 : framebuffer-attachment ( attachment -- id )
  42     GL_FRAMEBUFFER_EXT swap GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT
  43     0 <uint> [ glGetFramebufferAttachmentParameterivEXT ] keep *uint ;