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egl/haiku: Fix potential crash if double buffering is disabled

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* Don't assume the existence of the back buffer in swap_buffers

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23556>
This commit is contained in:
Alexander von Gluck IV 2023-06-09 11:48:44 -05:00 • committed by Marge Bot
parent 2089fc8188
commit 4b48d377ba
1 changed files with 6 additions and 2 deletions
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8
src/egl/drivers/haiku/egl_haiku.cpp
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@ -213,10 +213,12 @@ haiku_swap_buffers(_EGLDisplay *disp, _EGLSurface *surf)
struct pipe_screen *screen = hgl_dpy->disp->fscreen->screen;
struct hgl_buffer* buffer = hgl_surf->fb;
auto &backBuffer = buffer->textures[ST_ATTACHMENT_BACK_LEFT];
auto &frontBuffer = buffer->textures[ST_ATTACHMENT_FRONT_LEFT];
auto &backBuffer = buffer->textures[ST_ATTACHMENT_BACK_LEFT];
st->pipe->flush_resource(st->pipe, backBuffer);
// Inform ST of a flush if double buffering is used
if (backBuffer != NULL)
st->pipe->flush_resource(st->pipe, backBuffer);
_mesa_glthread_finish(st->ctx);
@ -235,6 +237,8 @@ haiku_swap_buffers(_EGLDisplay *disp, _EGLSurface *surf)
p_atomic_inc(&buffer->base.stamp);
}
// XXX: right front / back if BGL_STEREO?
update_size(buffer);
return EGL_TRUE;