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# /*#########################################################################
#
# The PyMca X-Ray Fluorescence Toolkit
#
# Copyright (c) 2004-2014 European Synchrotron Radiation Facility
#
# This file is part of the PyMca X-ray Fluorescence Toolkit developed at
# the ESRF by the Software group.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
__author__ = "T. Vincent - ESRF Data Analysis"
__contact__ = "thomas.vincent@esrf.fr"
__license__ = "MIT"
__copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
__doc__ = """
This module provides a texture associated to a framebuffer object for
off-screen rendering
"""
# import ######################################################################
from .gl import * # noqa
from ctypes import c_uint
from .GLTexture import Texture2D
# utils #######################################################################
def _deleteRenderbuffer(bufferId):
glDeleteRenderbuffers(1, (c_uint * 1)(bufferId))
def _deleteFramebuffer(bufferId):
glDeleteFramebuffers(1, (c_uint * 1)(bufferId))
# framebuffer #################################################################
class FBOTexture(Texture2D):
"""Texture with FBO aimed at off-screen rendering to texture"""
_PACKED_FORMAT = GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL
def __init__(self, internalFormat, width, height,
stencilFormat=GL_DEPTH24_STENCIL8,
depthFormat=GL_DEPTH24_STENCIL8, **kwargs):
super(FBOTexture, self).__init__(internalFormat, width, height,
**kwargs)
self._fbo = glGenFramebuffers(1)
glBindFramebuffer(GL_FRAMEBUFFER, self._fbo)
# Attachments
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, self.tid, 0)
if stencilFormat is not None:
self._stencilId = glGenRenderbuffers(1)
glBindRenderbuffer(GL_RENDERBUFFER, self._stencilId)
glRenderbufferStorage(GL_RENDERBUFFER, stencilFormat,
self.width, self.height)
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, self._stencilId)
if depthFormat is not None:
if self._stencilId and depthFormat in self._PACKED_FORMAT:
self._depthId = self._stencilId
else:
self._depthId = glGenRenderbuffers(1)
glBindRenderbuffer(GL_RENDERBUFFER, self._depthId)
glRenderbufferStorage(GL_RENDERBUFFER, depthFormat,
self.width, self.height)
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, self._depthId)
assert glCheckFramebufferStatus(GL_FRAMEBUFFER) == \
GL_FRAMEBUFFER_COMPLETE
glBindFramebuffer(GL_FRAMEBUFFER, 0)
@property
def fbo(self):
try:
return self._fbo
except AttributeError:
raise RuntimeError("No OpenGL framebuffer resource, \
discard has already been called")
def bindFBO(self):
glBindFramebuffer(GL_FRAMEBUFFER, self.fbo)
# with statement
def __enter__(self):
self.bindFBO()
def __exit__(self, excType, excValue, traceback):
glBindFramebuffer(GL_FRAMEBUFFER, 0)
def discard(self):
if hasattr(self, '_fbo'):
if bool(glDeleteFramebuffers): # Test for __del__
_deleteFramebuffer(self._fbo)
del self._fbo
if hasattr(self, '_stencilId'):
if bool(glDeleteRenderbuffers): # Test for __del__
_deleteRenderbuffer(self._stencilId)
if self._stencilId == getattr(self, '_depthId', -1):
del self._depthId
del self._stencilId
if hasattr(self, '_depthId'):
if bool(glDeleteRenderbuffers): # Test for __del__
_deleteRenderbuffer(self._depthId)
del self._depthId
super(FBOTexture, self).discard()
def __del__(self):
self.discard()
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