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neilmundayneilmunday
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More styling fixes.
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‎examples/pysdl2.py‎

Lines changed: 103 additions & 93 deletions
Original file line numberDiff line numberDiff line change
@@ -7,44 +7,132 @@
77
88
Install instructions.
99
10-
1. Install SDL libraries for your OS, e.g. for Fedora:
11-
12-
dnf install SDL2 SDL2_ttf SDL2_image SDL2_gfx SDL2_mixer
10+
1. Install SDL libraries for your OS, e.g:
11+
12+
Fedora:
13+
14+
sudo dnf install SDL2 SDL2_ttf SDL2_image SDL2_gfx SDL2_mixer
15+
16+
Ubuntu:
17+
18+
sudo apt-get install libsdl2-dev
1319
1420
2. Install PySDL via PIP:
1521
16-
pip2 install PySDL2
22+
sudo pip2 install PySDL2
1723
1824
Tested configurations:
1925
- SDL2 2.0.5 with PySDL2 0.9.3 on Fedora 25 (x86_64)
2026
"""
2127

2228
import os
2329
import sys
24-
from cefpython3 import cefpython as cef
30+
try:
31+
from cefpython3 import cefpython as cef
32+
except ImportError:
33+
print("cefpython3 module not found - please install")
34+
sys.exit(1)
2535
try:
2636
import sdl2
2737
import sdl2.ext
2838
except ImportError:
29-
print "SDL2 module not found - please install"
39+
print("SDL2 module not found - please install")
3040
sys.exit(1)
3141
try:
3242
from PIL import Image
3343
except ImportError:
34-
print "PIL module not found - please install"
44+
print("PIL module not found - please install")
3545
sys.exit(1)
3646

47+
def main():
48+
# The following variables control the dimensions of the window
49+
# and browser display area
50+
width = 1024
51+
height = 768
52+
# headerHeight is useful for leaving space for controls
53+
# at the top of the window (future implementation?)
54+
headerHeight = 0
55+
browserHeight = height - headerHeight
56+
browserWidth = width
57+
# Initialise CEF for offscreen rendering
58+
WindowUtils = cef.WindowUtils()
59+
sys.excepthook = cef.ExceptHook
60+
cef.Initialize(settings={"windowless_rendering_enabled": True})
61+
window_info = cef.WindowInfo()
62+
window_info.SetAsOffscreen(0)
63+
# Initialise SDL2 for video (add other init constants if you
64+
# require other SDL2 functionality e.g. mixer,
65+
# TTF, joystick etc.
66+
sdl2.SDL_Init(sdl2.SDL_INIT_VIDEO)
67+
# Create the window
68+
window = sdl2.video.SDL_CreateWindow(
69+
'cefpython3 SDL2 Demo',
70+
sdl2.video.SDL_WINDOWPOS_UNDEFINED,
71+
sdl2.video.SDL_WINDOWPOS_UNDEFINED,
72+
width,
73+
height,
74+
0
75+
)
76+
# Define default background colour (black in this case)
77+
backgroundColour = sdl2.SDL_Color(0, 0, 0)
78+
# Create the renderer using hardware acceleration
79+
renderer = sdl2.SDL_CreateRenderer(window, -1, sdl2.render.SDL_RENDERER_ACCELERATED)
80+
# Set-up the RenderHandler, passing in the SDL2 renderer
81+
renderHandler = RenderHandler(renderer, width, height - headerHeight)
82+
# Create the browser instance
83+
browser = cef.CreateBrowserSync(window_info, url="https://www.google.com/")
84+
browser.SetClientHandler(LoadHandler())
85+
browser.SetClientHandler(renderHandler)
86+
# Must call WasResized at least once to let know CEF that
87+
# viewport size is available and that OnPaint may be called.
88+
browser.SendFocusEvent(True)
89+
browser.WasResized()
90+
# Begin the main rendering loop
91+
running = True
92+
while running:
93+
# Convert SDL2 events into CEF events (where appropriate)
94+
events = sdl2.ext.get_events()
95+
for event in events:
96+
if event.type == sdl2.SDL_QUIT or (event.type == sdl2.SDL_KEYDOWN and event.key.keysym.sym == sdl2.SDLK_ESCAPE):
97+
running = False
98+
break
99+
if event.type == sdl2.SDL_MOUSEBUTTONDOWN:
100+
if event.button.button == sdl2.SDL_BUTTON_LEFT:
101+
if event.button.y > headerHeight:
102+
# Mouse click triggered in browser region
103+
browser.SendMouseClickEvent(event.button.x, event.button.y - headerHeight, cef.MOUSEBUTTON_LEFT, False, 1)
104+
elif event.type == sdl2.SDL_MOUSEBUTTONUP:
105+
if event.button.button == sdl2.SDL_BUTTON_LEFT:
106+
if event.button.y > headerHeight:
107+
# Mouse click triggered in browser region
108+
browser.SendMouseClickEvent(event.button.x, event.button.y - headerHeight, cef.MOUSEBUTTON_LEFT, True, 1)
109+
elif event.type == sdl2.SDL_MOUSEMOTION:
110+
if event.button.y > headerHeight:
111+
# Mouse click triggered in browser region
112+
browser.SendMouseMoveEvent(event.button.x, event.button.y - headerHeight, True)
113+
# Clear the renderer
114+
sdl2.SDL_SetRenderDrawColor(renderer, backgroundColour.r, backgroundColour.g, backgroundColour.b, 255)
115+
sdl2.SDL_RenderClear(renderer)
116+
# Tell CEF to update which will trigger the OnPaint
117+
# method of the RenderHandler instance
118+
cef.MessageLoopWork()
119+
# Update display
120+
sdl2.SDL_RenderCopy(renderer, renderHandler.texture, None, sdl2.SDL_Rect(0, headerHeight, browserWidth, browserHeight))
121+
sdl2.SDL_RenderPresent(renderer)
122+
# User exited
123+
exit_app()
124+
37125
class LoadHandler(object):
38126
"""Simple handler for loading URLs."""
39127

40128
def OnLoadingStateChange(self, browser, is_loading, **_):
41129
if not is_loading:
42-
print "loading complete"
130+
print("loading complete")
43131

44132
def OnLoadError(self, browser, frame, error_code, failed_url, **_):
45133
if not frame.IsMain():
46134
return
47-
print "Failed to load %s" % failed_url
135+
print("Failed to load %s" % failed_url)
48136
cef.PostTask(cef.TID_UI, exit_app, browser)
49137

50138
class RenderHandler(object):
@@ -81,9 +169,7 @@ def OnPaint(self, browser, element_type, paint_buffer, **_):
81169
'raw',
82170
'BGRA'
83171
)
84-
#
85172
# Following PIL to SDL2 surface code from pysdl2 source.
86-
#
87173
mode = image.mode
88174
rmask = gmask = bmask = amask = 0
89175
if mode == "RGB":
@@ -116,103 +202,27 @@ def OnPaint(self, browser, element_type, paint_buffer, **_):
116202
depth = 32
117203
pitch = self.__width * 4
118204
else:
119-
print "Unsupported mode: %s" % mode
205+
print("Unsupported mode: %s" % mode)
120206
exit_app()
121207

122208
pxbuf = image.tobytes()
123-
# create surface
209+
# Create surface
124210
surface = sdl2.SDL_CreateRGBSurfaceFrom(pxbuf, self.__width, self.__height, depth, pitch, rmask, gmask, bmask, amask)
125211
if self.texture:
126212
# free memory used by previous texture
127213
sdl2.SDL_DestroyTexture(self.texture)
128-
# create texture
214+
# Create texture
129215
self.texture = sdl2.SDL_CreateTextureFromSurface(self.__renderer, surface)
130-
# free the surface
216+
# Free the surface
131217
sdl2.SDL_FreeSurface(surface)
132218
else:
133-
print "Unsupport element_type in OnPaint"
219+
print("Unsupport element_type in OnPaint")
134220

135221
def exit_app():
136222
"""Tidy up SDL2 and CEF before exiting."""
137223
sdl2.SDL_Quit()
138224
cef.Shutdown()
139-
print "exited"
140-
141-
def main():
142-
# the following variables control the dimensions of the window
143-
# and browser display area
144-
width = 1024
145-
height = 768
146-
headerHeight = 0 # useful if for leaving space for controls at the top of the window (future implementation?)
147-
browserHeight = height - headerHeight
148-
browserWidth = width
149-
# initialise CEF for offscreen rendering
150-
WindowUtils = cef.WindowUtils()
151-
sys.excepthook = cef.ExceptHook
152-
cef.Initialize(settings={"windowless_rendering_enabled": True})
153-
window_info = cef.WindowInfo()
154-
window_info.SetAsOffscreen(0)
155-
# initialise SDL2 for video (add other init constants if you
156-
# require other SDL2 functionality e.g. mixer,
157-
# TTF, joystick etc.
158-
sdl2.SDL_Init(sdl2.SDL_INIT_VIDEO)
159-
# create the window
160-
window = sdl2.video.SDL_CreateWindow(
161-
'cefpython3 SDL2 Demo',
162-
sdl2.video.SDL_WINDOWPOS_UNDEFINED,
163-
sdl2.video.SDL_WINDOWPOS_UNDEFINED,
164-
width,
165-
height,
166-
0
167-
)
168-
# define default background colour (black in this case)
169-
backgroundColour = sdl2.SDL_Color(0, 0, 0)
170-
# create the renderer using hardware acceleration
171-
renderer = sdl2.SDL_CreateRenderer(window, -1, sdl2.render.SDL_RENDERER_ACCELERATED)
172-
# set-up the RenderHandler, passing in the SDL2 renderer
173-
renderHandler = RenderHandler(renderer, width, height - headerHeight)
174-
# create the browser instance
175-
browser = cef.CreateBrowserSync(window_info, url="https://www.google.com/")
176-
browser.SetClientHandler(LoadHandler())
177-
browser.SetClientHandler(renderHandler)
178-
# must call WasResized at least once to let know CEF that
179-
# viewport size is available and that OnPaint may be called.
180-
browser.SendFocusEvent(True)
181-
browser.WasResized()
182-
# begin the main rendering loop
183-
running = True
184-
while running:
185-
# convert SDL2 events into CEF events (where appropriate)
186-
events = sdl2.ext.get_events()
187-
for event in events:
188-
if event.type == sdl2.SDL_QUIT or (event.type == sdl2.SDL_KEYDOWN and event.key.keysym.sym == sdl2.SDLK_ESCAPE):
189-
running = False
190-
break
191-
if event.type == sdl2.SDL_MOUSEBUTTONDOWN:
192-
if event.button.button == sdl2.SDL_BUTTON_LEFT:
193-
if event.button.y > headerHeight:
194-
# mouse click triggered in browser region
195-
browser.SendMouseClickEvent(event.button.x, event.button.y - headerHeight, cef.MOUSEBUTTON_LEFT, False, 1)
196-
elif event.type == sdl2.SDL_MOUSEBUTTONUP:
197-
if event.button.button == sdl2.SDL_BUTTON_LEFT:
198-
if event.button.y > headerHeight:
199-
# mouse click triggered in browser region
200-
browser.SendMouseClickEvent(event.button.x, event.button.y - headerHeight, cef.MOUSEBUTTON_LEFT, True, 1)
201-
elif event.type == sdl2.SDL_MOUSEMOTION:
202-
if event.button.y > headerHeight:
203-
# mouse click triggered in browser region
204-
browser.SendMouseMoveEvent(event.button.x, event.button.y - headerHeight, True)
205-
# clear the renderer
206-
sdl2.SDL_SetRenderDrawColor(renderer, backgroundColour.r, backgroundColour.g, backgroundColour.b, 255)
207-
sdl2.SDL_RenderClear(renderer)
208-
# tell CEF to update which will trigger the OnPaint
209-
# method of the RenderHandler instance
210-
cef.MessageLoopWork()
211-
# update display
212-
sdl2.SDL_RenderCopy(renderer, renderHandler.texture, None, sdl2.SDL_Rect(0, headerHeight, browserWidth, browserHeight))
213-
sdl2.SDL_RenderPresent(renderer)
214-
# user exited
215-
exit_app()
225+
print("exited")
216226

217227
if __name__ == "__main__":
218228
main()

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