class FrameBufferObject:
def __init__(self, width, height):
super().__init__()
buffer_format = QOpenGLFramebufferObjectFormat()
buffer_format.setAttachment(QOpenGLFramebufferObject.Depth)
self._fbo = QOpenGLFramebufferObject(width, height, buffer_format)
self._contents = None
## Get the texture ID of the texture target of this FBO.
def getTextureId(self):
return self._fbo.texture()
## Bind the FBO so it can be rendered to.
def bind(self):
self._contents = None
self._fbo.bind()
## Release the FBO so it will no longer be rendered to.
def release(self):
self._fbo.release()
## Get the contents of the FBO as an image data object.
def getContents(self):
if not self._contents:
self._contents = self._fbo.toImage()
return self._contents
class QtFrameBufferObject(FrameBufferObject):
def __init__(self, width, height):
super().__init__()
buffer_format = QOpenGLFramebufferObjectFormat()
buffer_format.setAttachment(QOpenGLFramebufferObject.Depth)
self._fbo = QOpenGLFramebufferObject(width, height, buffer_format)
self._contents = None
def bind(self):
self._contents = None
self._fbo.bind()
def release(self):
self._fbo.release()
def getTextureId(self):
return self._fbo.texture()
def getContents(self):
if not self._contents:
self._contents = self._fbo.toImage()
return self._contents
class FrameBufferObject:
def __init__(self, width, height):
super().__init__()
buffer_format = QOpenGLFramebufferObjectFormat()
buffer_format.setAttachment(QOpenGLFramebufferObject.Depth)
self._fbo = QOpenGLFramebufferObject(width, height, buffer_format)
self._contents = None
## Get the texture ID of the texture target of this FBO.
def getTextureId(self):
return self._fbo.texture()
## Bind the FBO so it can be rendered to.
def bind(self):
self._contents = None
self._fbo.bind()
## Release the FBO so it will no longer be rendered to.
def release(self):
self._fbo.release()
## Get the contents of the FBO as an image data object.
def getContents(self):
if not self._contents:
self._contents = self._fbo.toImage()
return self._contents
class QtFrameBufferObject(FrameBufferObject):
def __init__(self, width, height):
super().__init__()
buffer_format = QOpenGLFramebufferObjectFormat()
buffer_format.setAttachment(QOpenGLFramebufferObject.Depth)
self._fbo = QOpenGLFramebufferObject(width, height, buffer_format)
self._contents = None
def bind(self):
self._contents = None
self._fbo.bind()
def release(self):
self._fbo.release()
def getTextureId(self):
return self._fbo.texture()
def getContents(self):
if not self._contents:
self._contents = self._fbo.toImage()
return self._contents
class FrameBufferObject:
"""An interface for OpenGL FrameBuffer Objects.
This class describes a minimal interface that is expected of FrameBuffer Object
classes.
"""
def __init__(self, width: int, height: int) -> None:
super().__init__()
buffer_format = QOpenGLFramebufferObjectFormat()
buffer_format.setAttachment(QOpenGLFramebufferObject.Depth)
self._fbo = QOpenGLFramebufferObject(width, height, buffer_format)
self._contents = None
def getTextureId(self) -> int:
"""Get the texture ID of the texture target of this FBO."""
return self._fbo.texture()
def bind(self) -> None:
"""Bind the FBO so it can be rendered to."""
self._contents = None
self._fbo.bind()
def release(self) -> None:
"""Release the FBO so it will no longer be rendered to."""
self._fbo.release()
def getContents(self) -> QImage:
"""Get the contents of the FBO as an image data object."""
if not self._contents:
self._contents = self._fbo.toImage()
return self._contents
def createFramebuffer(self, gl, dim, depth=False, filter=None, internalFormat=None, format=None, type=None):
''' Creates framebuffer object with required parameters '''
if filter is None: filter = gl.GL_LINEAR
framebuffer = QOpenGLFramebufferObject(dim, dim)
if depth: framebuffer.setAttachment(QOpenGLFramebufferObject.Depth)
textureId = framebuffer.texture()
assert textureId >= 0
gl.glBindTexture(gl.GL_TEXTURE_2D, textureId)
gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER, filter)
gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER, filter)
if internalFormat and format and type:
gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, internalFormat, dim, dim, 0, format, type, None)
gl.glBindTexture(gl.GL_TEXTURE_2D, 0)
return framebuffer
