33 lines
1.4 KiB
Diff
33 lines
1.4 KiB
Diff
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diff --git a/kivy/core/window/_window_sdl2.pyx b/kivy/core/window/_window_sdl2.pyx
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index 46e15ec63..5002cd0f9 100644
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--- a/kivy/core/window/_window_sdl2.pyx
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+++ b/kivy/core/window/_window_sdl2.pyx
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@@ -746,7 +746,13 @@ cdef class _WindowSDL2Storage:
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pass
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def flip(self):
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- SDL_GL_SwapWindow(self.win)
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+ # On Android (and potentially other platforms), SDL_GL_SwapWindow may
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+ # lock the thread waiting for a mutex from another thread to be
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+ # released. Calling SDL_GL_SwapWindow with the GIL released allow the
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+ # other thread to run (e.g. to process the event filter callback) and
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+ # release the mutex SDL_GL_SwapWindow is waiting for.
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+ with nogil:
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+ SDL_GL_SwapWindow(self.win)
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def save_bytes_in_png(self, filename, data, int width, int height):
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cdef SDL_Surface *surface = SDL_CreateRGBSurfaceFrom(
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diff --git a/kivy/lib/sdl2.pxi b/kivy/lib/sdl2.pxi
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index 6a539de6d..3a5a69d23 100644
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--- a/kivy/lib/sdl2.pxi
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+++ b/kivy/lib/sdl2.pxi
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@@ -627,7 +627,7 @@ cdef extern from "SDL.h":
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cdef SDL_GLContext SDL_GL_GetCurrentContext()
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cdef int SDL_GL_SetSwapInterval(int interval)
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cdef int SDL_GL_GetSwapInterval()
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- cdef void SDL_GL_SwapWindow(SDL_Window * window)
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+ cdef void SDL_GL_SwapWindow(SDL_Window * window) nogil
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cdef void SDL_GL_DeleteContext(SDL_GLContext context)
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cdef int SDL_NumJoysticks()
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