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neilmundayneilmunday
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Created pysdl2 example for issue cztomczak#324.
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‎examples/pysdl2.py‎

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#!/usr/bin/python2
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#
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# Simple SDL2 / cefpython3 example.
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#
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# Only handles mouse events but could be extended to handle others.
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#
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# Requires pysdl2 (and SDL2 library).
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#
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# Tested under Fedora Linux (x86_64).
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#
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# by Neil Munday (www.mundayweb.com)
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#
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import os
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import sys
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import sdl2
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import sdl2.ext
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import sdl2.sdlimage
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import sdl2.joystick
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import sdl2.video
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import sdl2.render
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import sdl2.sdlgfx
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import sdl2.sdlttf
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from cefpython3 import cefpython as cef
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from PIL import Image
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class LoadHandler(object):
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def OnLoadingStateChange(self, browser, is_loading, **_):
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if not is_loading:
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print "loading complete"
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def OnLoadError(self, browser, frame, error_code, failed_url, **_):
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if not frame.IsMain():
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return
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print "Failed to load %s" % failed_url
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cef.PostTask(cef.TID_UI, exit_app, browser)
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class RenderHandler(object):
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def __init__(self, renderer, width, height):
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self.__width = width
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self.__height = height
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self.__renderer = renderer
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self.texture = None
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def GetViewRect(self, rect_out, **_):
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rect_out.extend([0, 0, self.__width, self.__height])
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return True
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def GetScreenRect(self, browser, rect_out): # noqa: N802
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return False
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def GetScreenPoint(self, browser, view_x, view_y, screen_coordinates_out):
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return False
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def OnPaint(self, browser, element_type, paint_buffer, **_):
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#
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# Use PIL to create a set of bytes that we can turn into an SDL2 surface
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# and then convert this to a SDL2 texture for rendering the main program loop.
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#
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if element_type == cef.PET_VIEW:
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data = paint_buffer.GetString(mode="rgba", origin="top-left")
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image = Image.frombuffer('RGBA', (self.__width, self.__height), data, 'raw', 'BGRA')
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#
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# Following PIL to SDL2 surface code from pysdl2 source
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#
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mode = image.mode
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rmask = gmask = bmask = amask = 0
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if mode == "RGB":
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# 3x8-bit, 24bpp
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if sdl2.endian.SDL_BYTEORDER == sdl2.endian.SDL_LIL_ENDIAN:
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rmask = 0x0000FF
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gmask = 0x00FF00
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bmask = 0xFF0000
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else:
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rmask = 0xFF0000
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gmask = 0x00FF00
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bmask = 0x0000FF
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depth = 24
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pitch = self.__width * 3
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elif mode in ("RGBA", "RGBX"):
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# RGBX: 4x8-bit, no alpha
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# RGBA: 4x8-bit, alpha
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if sdl2.endian.SDL_BYTEORDER == sdl2.endian.SDL_LIL_ENDIAN:
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rmask = 0x00000000
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gmask = 0x0000FF00
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bmask = 0x00FF0000
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if mode == "RGBA":
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amask = 0xFF000000
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else:
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rmask = 0xFF000000
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gmask = 0x00FF0000
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bmask = 0x0000FF00
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if mode == "RGBA":
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amask = 0x000000FF
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depth = 32
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pitch = self.__width * 4
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else:
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print "Unsupported mode: %s" % mode
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exit_app()
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pxbuf = image.tobytes()
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# create surface
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surface = sdl2.SDL_CreateRGBSurfaceFrom(pxbuf, self.__width, self.__height, depth, pitch, rmask, gmask, bmask, amask)
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if self.texture:
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sdl2.SDL_DestroyTexture(self.texture)
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# create texture
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self.texture = sdl2.SDL_CreateTextureFromSurface(self.__renderer, surface)
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sdl2.SDL_FreeSurface(surface)
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else:
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print "Unsupport element_type in OnPaint"
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def exit_app():
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sdl2.SDL_Quit()
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cef.Shutdown()
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print "exited"
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if __name__ == "__main__":
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width = 1024
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height = 768
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headerHeight = 0 # useful if for leaving space for controls at the top of the window (future implementation?)
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browserHeight = height - headerHeight
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browserWidth = width
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WindowUtils = cef.WindowUtils()
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sys.excepthook = cef.ExceptHook
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cef.Initialize(settings={"windowless_rendering_enabled": True})
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sdl2.SDL_Init(sdl2.SDL_INIT_VIDEO)
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window = sdl2.video.SDL_CreateWindow('cefpython3 SDL2 Demo', sdl2.video.SDL_WINDOWPOS_UNDEFINED, sdl2.video.SDL_WINDOWPOS_UNDEFINED, width, height, 0)
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backgroundColour = sdl2.SDL_Color(0, 0, 0)
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renderer = sdl2.SDL_CreateRenderer(window, -1, sdl2.render.SDL_RENDERER_ACCELERATED)
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window_info = cef.WindowInfo()
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window_info.SetAsOffscreen(0)
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renderHandler = RenderHandler(renderer, width, height - headerHeight)
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browser = cef.CreateBrowserSync(window_info, url="https://www.google.com/")
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browser.SetClientHandler(LoadHandler())
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browser.SetClientHandler(renderHandler)
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browser.SendFocusEvent(True)
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browser.WasResized()
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running = True
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# main loop, handle events and rendering here
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while running:
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# convert SDL2 events into CEF events (where appropriate)
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events = sdl2.ext.get_events()
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for event in events:
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if event.type == sdl2.SDL_QUIT or (event.type == sdl2.SDL_KEYDOWN and event.key.keysym.sym == sdl2.SDLK_ESCAPE):
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running = False
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break
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if event.type == sdl2.SDL_MOUSEBUTTONDOWN:
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if event.button.button == sdl2.SDL_BUTTON_LEFT:
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if event.button.y > headerHeight:
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browser.SendMouseClickEvent(event.button.x, event.button.y - headerHeight, cef.MOUSEBUTTON_LEFT, False, 1)
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elif event.type == sdl2.SDL_MOUSEBUTTONUP:
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if event.button.button == sdl2.SDL_BUTTON_LEFT:
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if event.button.y > headerHeight:
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browser.SendMouseClickEvent(event.button.x, event.button.y - headerHeight, cef.MOUSEBUTTON_LEFT, True, 1)
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elif event.type == sdl2.SDL_MOUSEMOTION:
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if event.button.y > headerHeight:
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browser.SendMouseMoveEvent(event.button.x, event.button.y - headerHeight, True)
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sdl2.SDL_SetRenderDrawColor(renderer, backgroundColour.r, backgroundColour.g, backgroundColour.b, 255)
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sdl2.SDL_RenderClear(renderer)
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cef.MessageLoopWork()
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sdl2.SDL_RenderCopy(renderer, renderHandler.texture, None, sdl2.SDL_Rect(0, headerHeight, browserWidth, browserHeight))
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sdl2.SDL_RenderPresent(renderer)
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exit_app()
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