158 lines
5.4 KiB
Python
158 lines
5.4 KiB
Python
from ctypes import *
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from pyglet import gl
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from pyglet.canvas.headless import HeadlessCanvas
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from pyglet.libs.egl import egl
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from pyglet.libs.egl.egl import *
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from .base import CanvasConfig, Config, Context
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_fake_gl_attributes = {
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'double_buffer': 0,
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'stereo': 0,
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'aux_buffers': 0,
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'accum_red_size': 0,
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'accum_green_size': 0,
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'accum_blue_size': 0,
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'accum_alpha_size': 0
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}
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class HeadlessConfig(Config):
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def match(self, canvas):
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if not isinstance(canvas, HeadlessCanvas):
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raise RuntimeError('Canvas must be an instance of HeadlessCanvas')
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display_connection = canvas.display._display_connection
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# Construct array of attributes
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attrs = []
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for name, value in self.get_gl_attributes():
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if name == 'double_buffer':
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continue
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attr = HeadlessCanvasConfig.attribute_ids.get(name, None)
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if attr and value is not None:
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attrs.extend([attr, int(value)])
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attrs.extend([EGL_SURFACE_TYPE, EGL_PBUFFER_BIT])
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if self.opengl_api == "gl":
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attrs.extend([EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT])
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elif self.opengl_api == "gles":
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attrs.extend([EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT])
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else:
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raise ValueError(f"Unknown OpenGL API: {self.opengl_api}")
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attrs.extend([EGL_NONE])
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attrs_list = (egl.EGLint * len(attrs))(*attrs)
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num_config = egl.EGLint()
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egl.eglChooseConfig(display_connection, attrs_list, None, 0, byref(num_config))
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configs = (egl.EGLConfig * num_config.value)()
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egl.eglChooseConfig(display_connection, attrs_list, configs,
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num_config.value, byref(num_config))
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result = [HeadlessCanvasConfig(canvas, c, self) for c in configs]
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return result
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class HeadlessCanvasConfig(CanvasConfig):
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attribute_ids = {
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'buffer_size': egl.EGL_BUFFER_SIZE,
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'level': egl.EGL_LEVEL, # Not supported
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'red_size': egl.EGL_RED_SIZE,
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'green_size': egl.EGL_GREEN_SIZE,
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'blue_size': egl.EGL_BLUE_SIZE,
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'alpha_size': egl.EGL_ALPHA_SIZE,
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'depth_size': egl.EGL_DEPTH_SIZE,
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'stencil_size': egl.EGL_STENCIL_SIZE,
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'sample_buffers': egl.EGL_SAMPLE_BUFFERS,
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'samples': egl.EGL_SAMPLES,
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}
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def __init__(self, canvas, egl_config, config):
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super(HeadlessCanvasConfig, self).__init__(canvas, config)
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self._egl_config = egl_config
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context_attribs = (EGL_CONTEXT_MAJOR_VERSION, config.major_version or 2,
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EGL_CONTEXT_MINOR_VERSION, config.minor_version or 0,
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EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE, config.forward_compatible or 0,
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EGL_CONTEXT_OPENGL_DEBUG, config.debug or 0,
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EGL_NONE)
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self._context_attrib_array = (egl.EGLint * len(context_attribs))(*context_attribs)
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for name, attr in self.attribute_ids.items():
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value = egl.EGLint()
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egl.eglGetConfigAttrib(canvas.display._display_connection, egl_config, attr, byref(value))
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setattr(self, name, value.value)
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for name, value in _fake_gl_attributes.items():
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setattr(self, name, value)
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def compatible(self, canvas):
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# TODO check more
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return isinstance(canvas, HeadlessCanvas)
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def create_context(self, share):
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return HeadlessContext(self, share)
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class HeadlessContext(Context):
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def __init__(self, config, share):
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super(HeadlessContext, self).__init__(config, share)
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self.display_connection = config.canvas.display._display_connection
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self.egl_context = self._create_egl_context(share)
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if not self.egl_context:
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raise gl.ContextException('Could not create GL context')
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def _create_egl_context(self, share):
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if share:
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share_context = share.egl_context
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else:
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share_context = None
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if self.config.opengl_api == "gl":
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egl.eglBindAPI(egl.EGL_OPENGL_API)
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elif self.config.opengl_api == "gles":
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egl.eglBindAPI(egl.EGL_OPENGL_ES_API)
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return egl.eglCreateContext(self.config.canvas.display._display_connection,
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self.config._egl_config, share_context,
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self.config._context_attrib_array)
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def attach(self, canvas):
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if canvas is self.canvas:
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return
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super(HeadlessContext, self).attach(canvas)
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self.egl_surface = canvas.egl_surface
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self.set_current()
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def set_current(self):
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egl.eglMakeCurrent(
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self.display_connection, self.egl_surface, self.egl_surface, self.egl_context)
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super(HeadlessContext, self).set_current()
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def detach(self):
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if not self.canvas:
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return
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self.set_current()
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gl.glFlush() # needs to be in try/except?
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super(HeadlessContext, self).detach()
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egl.eglMakeCurrent(
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self.display_connection, 0, 0, None)
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self.egl_surface = None
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def destroy(self):
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super(HeadlessContext, self).destroy()
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if self.egl_context:
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egl.eglDestroyContext(self.display_connection, self.egl_context)
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self.egl_context = None
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def flip(self):
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if not self.egl_surface:
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return
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egl.eglSwapBuffers(self.display_connection, self.egl_surface)
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