def mirror_framebuffer(self,
src,
src_x=0,
src_y=0,
src_w=0,
src_h=0,
dst_x=0,
dst_y=0,
dst_w=0,
dst_h=0,
target=GL_COLOR_BUFFER_BIT,
filter_type=GL_LINEAR):
glBindFramebuffer(GL_READ_FRAMEBUFFER, src.buffer)
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, self.buffer)
if GL_COLOR_BUFFER_BIT == target:
glDrawBuffers(1, (GL_COLOR_ATTACHMENT0, ))
glReadBuffer(GL_COLOR_ATTACHMENT0)
elif GL_DEPTH_BUFFER_BIT == target and src.depth_texture is not None:
attachment = OpenGLContext.get_depth_attachment(
src.depth_texture.internal_format)
glDrawBuffers(1, (attachment, ))
glReadBuffer(attachment)
glBlitFramebuffer(src_w or src.viewport_width, src_y, src_x, src_h
or src.viewport_height, dst_x, dst_y, dst_w
or self.viewport_width, dst_h
or self.viewport_height, target, filter_type)
def generate_framebuffer(self, target_face=GL_TEXTURE_CUBE_MAP_POSITIVE_X, target_layer=0, target_level=0):
if self.buffer is None:
self.buffer = glGenFramebuffers(1)
glBindFramebuffer(GL_FRAMEBUFFER, self.buffer)
self.target_face = target_face
self.target_layer = target_layer
self.target_level = target_level
# bind color textures
layer_offset = 0
last_texture = None
for i, color_texture in enumerate(self.color_textures):
if last_texture != color_texture:
layer_offset = 0
last_texture = color_texture
else:
layer_offset += 1
if color_texture is not None:
self.attachment_framebuffer(GL_COLOR_ATTACHMENT0 + i, color_texture.target, color_texture.buffer, layer_offset)
if self.attach_count > 0:
glDrawBuffers(self.attach_count, self.attachments)
else:
glDrawBuffer(GL_NONE)
glReadBuffer(GL_NONE)
# bind depth texture
if self.depth_texture is not None:
attachment = OpenGLContext.get_depth_attachment(self.depth_texture.internal_format)
self.attachment_framebuffer(attachment, self.depth_texture.target, self.depth_texture.buffer)
else:
glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, 0, 0)
gl_error = glCheckFramebufferStatus(GL_FRAMEBUFFER)
if gl_error != GL_FRAMEBUFFER_COMPLETE:
error_message = "glCheckFramebufferStatus error %s." % self.get_error(gl_error)
logger.error(error_message)
raise BaseException(error_message)
def build_command(self):
self.commands.clear()
self.add_command(glBindFramebuffer, GL_FRAMEBUFFER, self.buffer)
# bind color textures
layer_offset = 0
last_texture = None
for i, color_texture in enumerate(self.color_textures):
if last_texture != color_texture:
layer_offset = 0
last_texture = color_texture
else:
layer_offset += 1
attachment = GL_COLOR_ATTACHMENT0 + i
if color_texture is not None:
self.add_command(self.func_bind_framebuffer, attachment,
color_texture.target, color_texture.buffer,
layer_offset)
if self.attach_count > 0:
self.add_command(glDrawBuffers, self.attach_count,
self.attachments)
else:
self.add_command(glDrawBuffer, GL_NONE)
self.add_command(glReadBuffer, GL_NONE)
# bind depth texture
if self.depth_texture is not None:
attachment = OpenGLContext.get_depth_attachment(
self.depth_texture.internal_format)
self.add_command(self.func_bind_framebuffer, attachment,
self.depth_texture.target,
self.depth_texture.buffer)
else:
self.add_command(glFramebufferTexture, GL_FRAMEBUFFER,
GL_DEPTH_STENCIL_ATTACHMENT, 0, 0)