def render_overlays(self, arg):
self.setup_scene(0, bind_bg=False, bind_hm=True)
self.hm_shader.set_uniform_1i('stage', 2)
self.hm_shader.set_uniform_1f('heatmap_mul', 1.0 if self.hm else 0.0)
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
glBlendEquation(GL_FUNC_ADD)
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, None)
glDisable(GL_BLEND)
return True
def on_draw(self, sink, context, sample):
assert context == self.glcontext
self.draws += 1
assert context == self.glcontext
frame_texture = _get_gl_texture_id(sample.get_buffer())
overlay_buffer = self.get_front_buffer()
overlay_texture = overlay_buffer.texture_id if overlay_buffer else 0
glDisable(GL_BLEND)
glBindVertexArray(self.vao)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_2D, frame_texture)
self.shader.use()
self.shader.set_uniform_1i('frame', 0)
glUniformMatrix4fv(self.u_transformation, 1, GL_FALSE, self.matrix)
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, None)
if overlay_texture:
glBindTexture(GL_TEXTURE_2D, overlay_texture)
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
glBlendEquation(GL_FUNC_ADD)
glUniformMatrix4fv(self.u_transformation, 1, GL_FALSE,
IDENTITY_MATRIX)
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, None)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_2D, 0)
glDisable(GL_BLEND)
context.clear_shader()
glBindVertexArray(0)
if overlay_buffer:
overlay_buffer.set_sync_point()
self.emit('drawn')
if not self.fps_start:
self.fps_start = time.monotonic()
elapsed = time.monotonic() - self.fps_start
if self.print_fps and elapsed > self.print_fps:
incoming_fps = self.incoming_frames / elapsed
draw_fps = self.draws / elapsed
incoming_overlay_fps = self.incoming_overlays / elapsed
render_fps = self.rendered_overlays / elapsed
print(
'glsvgoverlaysink: in frames {} ({:.2f} fps) svg {} ({:.2f} fps), rendered {} ({:.2f} fps), draw {} ({:.2f} fps)'
.format(self.incoming_frames, self.incoming_frames / elapsed,
self.incoming_overlays,
self.incoming_overlays / elapsed,
self.rendered_overlays,
self.rendered_overlays / elapsed, self.draws,
self.draws / elapsed))
self.incoming_frames = 0
self.incoming_overlays = 0
self.rendered_overlays = 0
self.draws = 0
self.fps_start = time.monotonic()
return True