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video: x11: Set XImage's byte_order field (fix #5081)

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If the X server's byte order is different from the client, things might
display in the wrong colour.

Apparently we can just set the byte_order field to the client's byte
order, and the X server will adjust everything automatically:
https://xorg.freedesktop.narkive.com/GbSD1aPq/ximage-s-byte-order-field
This commit is contained in:
David Gow 2021-12-08 12:38:16 +08:00 committed by Sam Lantinga
parent e7f84c20bc
commit 9da93d074b
1 changed files with 2 additions and 0 deletions
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2
src/video/x11/SDL_x11framebuffer.c
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@ -115,6 +115,7 @@ X11_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format,
shmdt(shminfo->shmaddr); shmdt(shminfo->shmaddr);
} else { } else {
/* Done! */ /* Done! */
data->ximage->byte_order = (SDL_BYTEORDER == SDL_BIG_ENDIAN) ? MSBFirst : LSBFirst;
data->use_mitshm = SDL_TRUE; data->use_mitshm = SDL_TRUE;
*pixels = shminfo->shmaddr; *pixels = shminfo->shmaddr;
return 0; return 0;
@ -135,6 +136,7 @@ X11_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format,
SDL_free(*pixels); SDL_free(*pixels);
return SDL_SetError("Couldn't create XImage"); return SDL_SetError("Couldn't create XImage");
} }
data->ximage->byte_order = (SDL_BYTEORDER == SDL_BIG_ENDIAN) ? MSBFirst : LSBFirst;
return 0; return 0;
} }