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cogl-winsys: Explicitly comment which vfuncs are optional

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Some of the virtual functions in CoglWinsysVtable only need to be
implemented for specific backends or when a specific feature is
advertised. This splits the vtable struct into two commented sections
marking which are optional and which are required. Wherever an
optional function is used there is now a g_return_if_fail to ensure
there is an implementation.
This commit is contained in:
Neil Roberts 2011-05-10 13:51:41 +01:00
parent 614efb190b
commit 14d1303259
5 changed files with 52 additions and 38 deletions
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3
cogl/cogl-clutter.c
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@ -74,6 +74,9 @@ cogl_clutter_winsys_xlib_get_visual_info (void)
winsys = _cogl_context_get_winsys (ctx);
/* This should only be called for xlib contexts */
g_return_val_if_fail (winsys->xlib_get_visual_info != NULL, NULL);
return winsys->xlib_get_visual_info ();
}
#endif

4
cogl/cogl-context.c
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@ -495,6 +495,10 @@ EGLDisplay
cogl_context_egl_get_egl_display (CoglContext *context)
{
const CoglWinsysVtable *winsys = _cogl_context_get_winsys (context);
/* This should only be called for EGL contexts */
g_return_val_if_fail (winsys->context_egl_get_egl_display != NULL, NULL);
return winsys->context_egl_get_egl_display (context);
}
#endif

27
cogl/cogl-framebuffer.c
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@ -1615,6 +1615,11 @@ cogl_framebuffer_swap_region (CoglFramebuffer *framebuffer,
{
const CoglWinsysVtable *winsys =
_cogl_framebuffer_get_winsys (framebuffer);
/* This should only be called if the winsys advertises
COGL_WINSYS_FEATURE_SWAP_REGION */
g_return_if_fail (winsys->onscreen_swap_region != NULL);
winsys->onscreen_swap_region (COGL_ONSCREEN (framebuffer),
rectangles,
n_rectangles);
@ -1647,6 +1652,10 @@ cogl_onscreen_x11_get_window_xid (CoglOnscreen *onscreen)
else
{
const CoglWinsysVtable *winsys = _cogl_framebuffer_get_winsys (framebuffer);
/* This should only be called for x11 onscreens */
g_return_val_if_fail (winsys->onscreen_x11_get_window_xid != NULL, 0);
return winsys->onscreen_x11_get_window_xid (onscreen);
}
}
@ -1656,8 +1665,14 @@ cogl_onscreen_x11_get_visual_xid (CoglOnscreen *onscreen)
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
const CoglWinsysVtable *winsys = _cogl_framebuffer_get_winsys (framebuffer);
XVisualInfo *visinfo = winsys->xlib_get_visual_info ();
guint32 id = (guint32)visinfo->visualid;
XVisualInfo *visinfo;
guint32 id;
/* This should only be called for xlib based onscreens */
g_return_val_if_fail (winsys->xlib_get_visual_info != NULL, 0);
visinfo = winsys->xlib_get_visual_info ();
id = (guint32)visinfo->visualid;
XFree (visinfo);
return id;
@ -1675,6 +1690,10 @@ cogl_framebuffer_add_swap_buffers_callback (CoglFramebuffer *framebuffer,
/* Should this just be cogl_onscreen API instead? */
g_return_val_if_fail (framebuffer->type == COGL_FRAMEBUFFER_TYPE_ONSCREEN, 0);
/* This should only be called when
COGL_WINSYS_FEATURE_SWAP_BUFFERS_EVENT is advertised */
g_return_val_if_fail (winsys->onscreen_add_swap_buffers_callback != NULL, 0);
return winsys->onscreen_add_swap_buffers_callback (onscreen,
callback,
user_data);
@ -1687,6 +1706,10 @@ cogl_framebuffer_remove_swap_buffers_callback (CoglFramebuffer *framebuffer,
CoglOnscreen *onscreen = COGL_ONSCREEN (framebuffer);
const CoglWinsysVtable *winsys = _cogl_framebuffer_get_winsys (framebuffer);
/* This should only be called when
COGL_WINSYS_FEATURE_SWAP_BUFFERS_EVENT is advertised */
g_return_if_fail (winsys->onscreen_remove_swap_buffers_callback != NULL);
winsys->onscreen_remove_swap_buffers_callback (onscreen, id);
}

20
cogl/winsys/cogl-winsys-egl.c
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@ -1412,22 +1412,6 @@ _cogl_winsys_onscreen_x11_get_window_xid (CoglOnscreen *onscreen)
}
#endif
static unsigned int
_cogl_winsys_onscreen_add_swap_buffers_callback (CoglOnscreen *onscreen,
CoglSwapBuffersNotify callback,
void *user_data)
{
/* Unsupported feature */
return 0;
}
static void
_cogl_winsys_onscreen_remove_swap_buffers_callback (CoglOnscreen *onscreen,
unsigned int id)
{
/* Unsupported feature */
}
static void
_cogl_winsys_onscreen_update_swap_throttled (CoglOnscreen *onscreen)
{
@ -1499,10 +1483,6 @@ static CoglWinsysVtable _cogl_winsys_vtable =
.onscreen_x11_get_window_xid =
_cogl_winsys_onscreen_x11_get_window_xid,
#endif
.onscreen_add_swap_buffers_callback =
_cogl_winsys_onscreen_add_swap_buffers_callback,
.onscreen_remove_swap_buffers_callback =
_cogl_winsys_onscreen_remove_swap_buffers_callback,
};
/* XXX: we use a function because no doubt someone will complain

36
cogl/winsys/cogl-winsys-private.h
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@ -56,6 +56,8 @@ typedef struct _CoglWinsysVtable
{
const char *name;
/* Required functions */
CoglFuncPtr
(*get_proc_address) (const char *name);
@ -77,16 +79,6 @@ typedef struct _CoglWinsysVtable
void
(*context_deinit) (CoglContext *context);
#ifdef COGL_HAS_EGL_SUPPORT
EGLDisplay
(*context_egl_get_egl_display) (CoglContext *context);
#endif
#ifdef COGL_HAS_XLIB_SUPPORT
XVisualInfo *
(*xlib_get_visual_info) (void);
#endif
gboolean
(*onscreen_init) (CoglOnscreen *onscreen, GError **error);
@ -99,13 +91,29 @@ typedef struct _CoglWinsysVtable
void
(*onscreen_swap_buffers) (CoglOnscreen *onscreen);
void
(*onscreen_update_swap_throttled) (CoglOnscreen *onscreen);
void
(*onscreen_set_visibility) (CoglOnscreen *onscreen,
gboolean visibility);
/* Optional functions */
void
(*onscreen_swap_region) (CoglOnscreen *onscreen,
int *rectangles,
int n_rectangles);
void
(*onscreen_update_swap_throttled) (CoglOnscreen *onscreen);
#ifdef COGL_HAS_EGL_SUPPORT
EGLDisplay
(*context_egl_get_egl_display) (CoglContext *context);
#endif
#ifdef COGL_HAS_XLIB_SUPPORT
XVisualInfo *
(*xlib_get_visual_info) (void);
#endif
guint32
(*onscreen_x11_get_window_xid) (CoglOnscreen *onscreen);
@ -119,10 +127,6 @@ typedef struct _CoglWinsysVtable
(*onscreen_remove_swap_buffers_callback) (CoglOnscreen *onscreen,
unsigned int id);
void
(*onscreen_set_visibility) (CoglOnscreen *onscreen,
gboolean visibility);
#ifdef COGL_HAS_XLIB_SUPPORT
gboolean
(*texture_pixmap_x11_create) (CoglTexturePixmapX11 *tex_pixmap);