def __init__(self, texture, *args, **kwargs):
"""A Framebuffer object, which when bound redirects draws to its texture. This is useful for deferred rendering."""
super(FBO, self).__init__(*args, **kwargs)
self._old_viewport_size = (gl.GLint * 4)()
self.texture = texture
self.renderbuffer = tex.RenderBuffer(
texture.width, texture.height) if not isinstance(
texture, tex.DepthTexture) else None
with self: #, self.texture: # TODO: Figure out whether texture should also be bound here.
# Attach the textures to the FBO
for texture in [self.texture, self.renderbuffer
] if self.renderbuffer else [self.texture]:
texture.attach_to_fbo()
# Set Draw and Read locations for the FBO (currently, just turn it off if not doing any color stuff)
if isinstance(texture, tex.DepthTexture):
gl.glDrawBuffer(gl.GL_NONE) # No color in this buffer
gl.glReadBuffer(gl.GL_NONE)
# check FBO status (warning appears for debugging)
FBOstatus = gl.glCheckFramebufferStatusEXT(gl.GL_FRAMEBUFFER_EXT)
if FBOstatus != gl.GL_FRAMEBUFFER_COMPLETE_EXT:
raise BufferError(
"GL_FRAMEBUFFER_COMPLETE failed, CANNOT use FBO.\n{0}\n".
format(FBOstatus))
def __init__(self, texture, *args, **kwargs):
"""A Framebuffer object, which when bound redirects draws to its texture. This is useful for deferred rendering."""
super(FBO, self).__init__(*args, **kwargs)
self.id = create_opengl_object(gl.glGenFramebuffersEXT)
self._old_viewport = get_viewport()
self.texture = texture
self.renderbuffer = RenderBuffer(
texture.width,
texture.height) if not isinstance(texture, DepthTexture) else None
with self:
# Attach the textures to the FBO
self.texture.attach_to_fbo()
if self.renderbuffer:
self.renderbuffer.attach_to_fbo()
# Set Draw and Read locations for the FBO (currently, just turn it off if not doing any color stuff)
if isinstance(texture, DepthTexture):
gl.glDrawBuffer(gl.GL_NONE) # No color in this buffer
gl.glReadBuffer(gl.GL_NONE)
# check FBO status (warning appears for debugging)
FBOstatus = gl.glCheckFramebufferStatusEXT(gl.GL_FRAMEBUFFER_EXT)
if FBOstatus != gl.GL_FRAMEBUFFER_COMPLETE_EXT:
raise BufferError(
"GL_FRAMEBUFFER_COMPLETE failed, CANNOT use FBO.\n{0}\n".
format(FBOstatus))
def blit_fbo(width, height, src_id, target_id, target_image=gl.GL_BACK):
# For drawing a multisampled FBO to a non-multisampled FBO or to the
# screen. See
# https://www.khronos.org/opengl/wiki/Multisampling#Allocating_a_Multisample_Render_Target
gl.glBindFramebuffer(gl.GL_READ_FRAMEBUFFER, src_id)
gl.glBindFramebuffer(gl.GL_DRAW_FRAMEBUFFER, target_id)
gl.glDrawBuffer(target_image)
gl.glBlitFramebuffer(0, 0, width, height, 0, 0, width, height,
gl.GL_COLOR_BUFFER_BIT, gl.GL_NEAREST)
def draw_canvas():
# Draw full-screen canvas
gl.glDrawBuffer(gl.GL_COLOR_ATTACHMENT0_EXT)
gl.glBegin(gl.GL_QUADS)
for coords in [(-1.0, -1.0),
(1.0, -1.0),
(1.0, 1.0),
(-1.0, 1.0)]:
gl.glVertex3f(coords[0], coords[1], 0.0)
gl.glEnd()
def __init__(self, texture, *args, **kwargs):
"""A Framebuffer object, which when bound redirects draws to its texture. This is useful for deferred rendering."""
super(FBO, self).__init__(*args, **kwargs)
self._old_viewport_size = (gl.GLint * 4)()
self.texture = texture
self.renderbuffer = tex.RenderBuffer(texture.width, texture.height) if not isinstance(texture, tex.DepthTexture) else None
with self: #, self.texture: # TODO: Figure out whether texture should also be bound here.
# Attach the textures to the FBO
for texture in [self.texture, self.renderbuffer] if self.renderbuffer else [self.texture]:
texture.attach_to_fbo()
# Set Draw and Read locations for the FBO (currently, just turn it off if not doing any color stuff)
if isinstance(texture, tex.DepthTexture):
gl.glDrawBuffer(gl.GL_NONE) # No color in this buffer
gl.glReadBuffer(gl.GL_NONE)
# check FBO status (warning appears for debugging)
FBOstatus = gl.glCheckFramebufferStatusEXT(gl.GL_FRAMEBUFFER_EXT)
if FBOstatus != gl.GL_FRAMEBUFFER_COMPLETE_EXT:
raise BufferError("GL_FRAMEBUFFER_COMPLETE failed, CANNOT use FBO.\n{0}\n".format(FBOstatus))