def attach_to_fbo(self):
gl.glFramebufferRenderbufferEXT(gl.GL_FRAMEBUFFER_EXT, self.attachment_point, self.target, self.id)
def attach_to_fbo(self):
gl.glFramebufferRenderbufferEXT(gl.GL_FRAMEBUFFER_EXT,
self.attachment_point, self.target,
self.id)
def __init__(self, width, height):
"""Creates a FBO"""
self.initialized = False
assert self.supported()
self.width = width
self.height = height
self.framebuffer_id = ctypes.c_uint(0)
self.depthbuffer_id = ctypes.c_uint(0)
self.texture_id = ctypes.c_uint(0)
# Frame buffer
gl.glGenFramebuffersEXT(
1, # number of buffers created
ctypes.byref(self.framebuffer_id), # dest. id
)
self.initialized = True
with self._bound_context(gl.GL_FRAMEBUFFER_EXT):
# Depth buffer
gl.glGenRenderbuffersEXT(
1, # no. of buffers created
ctypes.byref(self.depthbuffer_id), # dest. id
)
gl.glBindRenderbufferEXT(
gl.GL_RENDERBUFFER_EXT, # target
self.depthbuffer_id, # id
)
gl.glRenderbufferStorageEXT(
gl.GL_RENDERBUFFER_EXT, # target
gl.GL_DEPTH_COMPONENT, # internal format
self.width, self.height, # size
)
gl.glFramebufferRenderbufferEXT(
gl.GL_FRAMEBUFFER_EXT, # target
gl.GL_DEPTH_ATTACHMENT_EXT, # attachment point
gl.GL_RENDERBUFFER_EXT, # renderbuffer target
self.depthbuffer_id, # renderbuffer id
)
# Target Texture
gl.glGenTextures(
1, # no. of textures
ctypes.byref(self.texture_id), # dest. id
)
gl.glBindTexture(
gl.GL_TEXTURE_2D, # target
self.texture_id, # texture id
)
# Black magic (props to pyprocessing!)
# (nearest works, as well as linear)
gl.glTexParameteri(
gl.GL_TEXTURE_2D, # target
gl.GL_TEXTURE_MAG_FILTER, # property name
gl.GL_LINEAR, # value
)
gl.glTexParameteri(
gl.GL_TEXTURE_2D, # target
gl.GL_TEXTURE_MIN_FILTER, # property name
gl.GL_LINEAR, # value
)
# Attach texture to FBO
gl.glTexImage2D(
gl.GL_TEXTURE_2D, # target
0, # mipmap level (0=default)
gl.GL_RGBA8, # internal format
self.width, self.height, # size
0, # border
gl.GL_RGBA, # format
gl.GL_UNSIGNED_BYTE, # type
None, # data
)
gl.glFramebufferTexture2DEXT(
gl.GL_FRAMEBUFFER_EXT, # target
gl.GL_COLOR_ATTACHMENT0_EXT, # attachment point
gl.GL_TEXTURE_2D, # texture target
self.texture_id, # tex id
0, # mipmap level
)
# sanity check
status = gl.glCheckFramebufferStatusEXT(gl.GL_FRAMEBUFFER_EXT)
assert status == gl.GL_FRAMEBUFFER_COMPLETE_EXT
