def _init_thread(self):
""" Complete SDL2 interface initialisation. """
# initialise SDL
sdl2.SDL_Init(sdl2.SDL_INIT_EVERYTHING)
# set clipboard handler to SDL2
backend.clipboard_handler = SDL2Clipboard()
# display palettes for blink states 0, 1
self.show_palette = [
sdl2.SDL_AllocPalette(256),
sdl2.SDL_AllocPalette(256)
]
# get physical screen dimensions (needs to be called before set_mode)
display_mode = sdl2.SDL_DisplayMode()
sdl2.SDL_GetCurrentDisplayMode(0, ctypes.byref(display_mode))
self.physical_size = display_mode.w, display_mode.h
# create the window initially, size will be corrected later
self.display = None
# create window in same thread that manipulates it
# "NOTE: You should not expect to be able to create a window, render, or receive events on any thread other than the main one"
# https://wiki.libsdl.org/CategoryThread
# http://stackoverflow.com/questions/27751533/sdl2-threading-seg-fault
self._do_create_window(640, 400)
# load an all-black 16-colour game palette to get started
self.set_palette([(0, 0, 0)] * 16, None)
self.move_cursor(1, 1)
self.set_page(0, 0)
self.set_mode(self.kwargs['initial_mode'])
# support for CGA composite
self.composite_palette = sdl2.SDL_AllocPalette(256)
composite_colors = video_graphical.composite_640.get(
self.composite_card, video_graphical.composite_640['cga'])
colors = (sdl2.SDL_Color * 256)(
*[sdl2.SDL_Color(r, g, b, 255) for (r, g, b) in composite_colors])
sdl2.SDL_SetPaletteColors(self.composite_palette, colors, 0, 256)
# check if we can honour scaling=smooth
if self.smooth:
# pointer to the zoomed surface
self.zoomed = None
pixelformat = self.display_surface.contents.format
if pixelformat.contents.BitsPerPixel != 32:
logging.warning(
'Smooth scaling not available on this display of %d-bit colour depth: needs 32-bit',
self.display_surface.format.contents.BitsPerPixel)
self.smooth = False
if not hasattr(sdl2, 'sdlgfx'):
logging.warning(
'Smooth scaling not available: SDL_GFX extension not found.'
)
self.smooth = False
# available joysticks
num_joysticks = sdl2.SDL_NumJoysticks()
for j in range(num_joysticks):
sdl2.SDL_JoystickOpen(j)
# if a joystick is present, its axes report 128 for mid, not 0
for axis in (0, 1):
backend.input_queue.put(
backend.Event(backend.STICK_MOVED, (j, axis, 128)))
def __enter__(self):
"""Complete SDL2 interface initialisation."""
# set clipboard handler to SDL2
self.clipboard_handler = get_clipboard_handler()
# display palettes for blink states 0, 1
self.show_palette = [
sdl2.SDL_AllocPalette(256),
sdl2.SDL_AllocPalette(256)
]
# get physical screen dimensions (needs to be called before set_mode)
# load an all-black 16-colour game palette to get started
self.set_palette([(0, 0, 0)] * 16, None)
self.move_cursor(1, 1)
self.set_page(0, 0)
# set_mode should be first event on queue
# support for CGA composite
self.composite_palette = sdl2.SDL_AllocPalette(256)
composite_colors = video_graphical.composite_640.get(
self.composite_card, video_graphical.composite_640['cga'])
colors = (sdl2.SDL_Color * 256)(
*[sdl2.SDL_Color(r, g, b, 255) for (r, g, b) in composite_colors])
sdl2.SDL_SetPaletteColors(self.composite_palette, colors, 0, 256)
# check if we can honour scaling=smooth
if self.smooth:
# pointer to the zoomed surface
self.zoomed = None
pixelformat = self.display_surface.contents.format
if pixelformat.contents.BitsPerPixel != 32:
logging.warning(
'Smooth scaling not available on this display of %d-bit colour depth: needs 32-bit',
self.display_surface.format.contents.BitsPerPixel)
self.smooth = False
if not hasattr(sdl2, 'sdlgfx'):
logging.warning(
'Smooth scaling not available: SDL_GFX extension not found.'
)
self.smooth = False
# available joysticks
num_joysticks = sdl2.SDL_NumJoysticks()
for j in range(num_joysticks):
sdl2.SDL_JoystickOpen(j)
# if a joystick is present, its axes report 128 for mid, not 0
for axis in (0, 1):
self.input_queue.put(
signals.Event(signals.STICK_MOVED, (j, axis, 128)))
# enable IME
sdl2.SDL_StartTextInput()
return video_graphical.VideoGraphical.__enter__(self)
def _set_icon(self):
"""Set the icon on the SDL window."""
mask = numpy.array(self.icon).T.repeat(2, 0).repeat(2, 1)
icon = sdl2.SDL_CreateRGBSurface(0, mask.shape[0], mask.shape[1], 8, 0, 0, 0, 0)
pixels2d(icon.contents)[:] = mask
# icon palette (black & white)
icon_palette = sdl2.SDL_AllocPalette(256)
icon_colors = [ sdl2.SDL_Color(x, x, x, 255) for x in [0, 255] + [255]*254 ]
sdl2.SDL_SetPaletteColors(icon_palette, (sdl2.SDL_Color * 256)(*icon_colors), 0, 2)
sdl2.SDL_SetSurfacePalette(icon, icon_palette)
sdl2.SDL_SetWindowIcon(self.display, icon)
sdl2.SDL_FreeSurface(icon)
sdl2.SDL_FreePalette(icon_palette)