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Implement multi-backend support

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The Clutter backend split is opaque enough that should allow us to just
build all possible backends inside the same shared object, and select
the wanted backend at initialization time.

This requires some work in the build system, as well as the
initialization code, to remove duplicate functions that might cause
conflicts at build and link time. We also need to defer all the checks
of the internal state of the platform-specific API to run-time type
checks.
This commit is contained in:
Emmanuele Bassi
2011-09-21 18:05:03 +01:00
parent 9c102b7c51
commit a09bbffd92
25 changed files with 591 additions and 411 deletions
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55
clutter/egl/clutter-backend-eglnative.c
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@ -38,6 +38,7 @@
#include <errno.h>
#include "clutter-backend-eglnative.h"
/* This is a Cogl based backend */
#include "cogl/clutter-stage-cogl.h"
@ -53,18 +54,18 @@
#ifdef COGL_HAS_EGL_SUPPORT
#include "clutter-egl.h"
#endif
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
#ifdef CLUTTER_EGL_BACKEND_CEX100
#include "clutter-cex100.h"
#endif
static gchar *clutter_vblank = NULL;
/* FIXME: We should have CLUTTER_ define for this... */
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
#ifdef CLUTTER_EGL_BACKEND_CEX100
static gdl_plane_id_t gdl_plane = GDL_PLANE_ID_UPP_C;
static guint gdl_n_buffers = CLUTTER_CEX100_TRIPLE_BUFFERING;
#endif
static gboolean gdl_plane_set = FALSE;
static gboolean gdl_n_buffers_set = FALSE;
G_DEFINE_TYPE (ClutterBackendEglNative, _clutter_backend_egl_native, CLUTTER_TYPE_BACKEND_COGL);
static ClutterDeviceManager *
@ -91,6 +92,7 @@ clutter_backend_egl_native_init_events (ClutterBackend *backend)
#ifdef HAVE_TSLIB
_clutter_events_tslib_init (CLUTTER_BACKEND_EGL (backend));
#endif
#ifdef HAVE_EVDEV
_clutter_events_evdev_init (CLUTTER_BACKEND (backend));
#endif
@ -157,9 +159,8 @@ clutter_backend_egl_native_create_context (ClutterBackend *backend,
swap_chain = cogl_swap_chain_new ();
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
cogl_swap_chain_set_length (swap_chain, gdl_n_buffers);
#endif
if (gdl_n_buffers_set)
cogl_swap_chain_set_length (swap_chain, gdl_n_buffers);
onscreen_template = cogl_onscreen_template_new (swap_chain);
cogl_object_unref (swap_chain);
@ -176,9 +177,10 @@ clutter_backend_egl_native_create_context (ClutterBackend *backend,
backend->cogl_display = cogl_display_new (backend->cogl_renderer,
onscreen_template);
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
cogl_gdl_display_set_plane (backend->cogl_display, gdl_plane);
#endif
#ifdef CLUTTER_EGL_BACKEND_CEX100
if (gdl_plane_set)
cogl_gdl_display_set_plane (backend->cogl_display, gdl_plane);
#endif /* CLUTTER_EGL_BACKEND_CEX100 */
cogl_object_unref (backend->cogl_renderer);
cogl_object_unref (onscreen_template);
@ -235,28 +237,41 @@ _clutter_backend_egl_native_init (ClutterBackendEglNative *backend_egl_native)
#endif
}
GType
_clutter_backend_impl_get_type (void)
{
return _clutter_backend_egl_native_get_type ();
}
/* FIXME we should have a CLUTTER_ define for this */
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
/**
* clutter_cex100_set_plane:
* @plane: FIXME
*
* FIXME
*
* Since:
*/
void
clutter_cex100_set_plane (gdl_plane_id_t plane)
{
#ifdef CLUTTER_EGL_BACKEND_CEX100
g_return_if_fail (plane >= GDL_PLANE_ID_UPP_A && plane <= GDL_PLANE_ID_UPP_E);
gdl_plane = plane;
gdl_plane_set = TRUE;
#endif
}
/**
* clutter_cex100_set_plane:
* @mode: FIXME
*
* FIXME
*
* Since:
*/
void
clutter_cex100_set_buffering_mode (ClutterCex100BufferingMode mode)
{
#ifdef CLUTTER_EGL_BACKEND_CEX100
g_return_if_fail (mode == CLUTTER_CEX100_DOUBLE_BUFFERING ||
mode == CLUTTER_CEX100_TRIPLE_BUFFERING);
gdl_n_buffers = mode;
}
gdl_n_buffers_set = TRUE;
#endif
}