fl_texture_registrar.cc File Reference

#include "flutter/shell/platform/linux/public/flutter_linux/fl_texture_registrar.h"
#include <gmodule.h>
#include "flutter/shell/platform/embedder/embedder.h"
#include "flutter/shell/platform/linux/fl_engine_private.h"
#include "flutter/shell/platform/linux/fl_pixel_buffer_texture_private.h"
#include "flutter/shell/platform/linux/fl_texture_gl_private.h"
#include "flutter/shell/platform/linux/fl_texture_private.h"
#include "flutter/shell/platform/linux/fl_texture_registrar_private.h"

Go to the source code of this file.

Functions
	G_DECLARE_FINAL_TYPE (FlTextureRegistrarImpl, fl_texture_registrar_impl, FL, TEXTURE_REGISTRAR_IMPL, GObject) struct _FlTextureRegistrarImpl
static void	fl_texture_registrar_impl_iface_init (FlTextureRegistrarInterface *iface)
	G_DEFINE_TYPE_WITH_CODE (FlTextureRegistrarImpl, fl_texture_registrar_impl, G_TYPE_OBJECT, G_IMPLEMENT_INTERFACE(fl_texture_registrar_get_type(), fl_texture_registrar_impl_iface_init)) static void fl_texture_registrar_default_init(FlTextureRegistrarInterface *iface)
static void	fl_texture_registrar_impl_dispose (GObject *object)
static void	fl_texture_registrar_impl_class_init (FlTextureRegistrarImplClass *klass)
static gboolean	register_texture (FlTextureRegistrar *registrar, FlTexture *texture)
static FlTexture *	lookup_texture (FlTextureRegistrar *registrar, int64_t texture_id)
static gboolean	mark_texture_frame_available (FlTextureRegistrar *registrar, FlTexture *texture)
static gboolean	unregister_texture (FlTextureRegistrar *registrar, FlTexture *texture)
static void	shutdown (FlTextureRegistrar *registrar)
static void	fl_texture_registrar_impl_init (FlTextureRegistrarImpl *self)
G_MODULE_EXPORT gboolean	fl_texture_registrar_register_texture (FlTextureRegistrar *self, FlTexture *texture)
FlTexture *	fl_texture_registrar_lookup_texture (FlTextureRegistrar *self, int64_t texture_id)
G_MODULE_EXPORT gboolean	fl_texture_registrar_mark_texture_frame_available (FlTextureRegistrar *self, FlTexture *texture)
G_MODULE_EXPORT gboolean	fl_texture_registrar_unregister_texture (FlTextureRegistrar *self, FlTexture *texture)
void	fl_texture_registrar_shutdown (FlTextureRegistrar *self)
FlTextureRegistrar *	fl_texture_registrar_new (FlEngine *engine)

Function Documentation

fl_texture_registrar_impl_class_init()

static void fl_texture_registrar_impl_class_init ( FlTextureRegistrarImplClass *  klass )

static

Definition at line 70 of file fl_texture_registrar.cc.

                                        {
  G_OBJECT_CLASS(klass)->dispose = fl_texture_registrar_impl_dispose;
}

References fl_texture_registrar_impl_dispose().

fl_texture_registrar_impl_dispose()

static void fl_texture_registrar_impl_dispose ( GObject *  object )

static

Definition at line 57 of file fl_texture_registrar.cc.

                                                               {
  FlTextureRegistrarImpl* self = FL_TEXTURE_REGISTRAR_IMPL(object);
 
  g_mutex_lock(&self->textures_mutex);
  g_clear_pointer(&self->textures, g_hash_table_unref);
  g_mutex_unlock(&self->textures_mutex);
 
  g_weak_ref_clear(&self->engine);
  g_mutex_clear(&self->textures_mutex);
 
  G_OBJECT_CLASS(fl_texture_registrar_impl_parent_class)->dispose(object);
}

Referenced by fl_texture_registrar_impl_class_init().

fl_texture_registrar_impl_iface_init()

static void fl_texture_registrar_impl_iface_init ( FlTextureRegistrarInterface *  iface )

static

Definition at line 164 of file fl_texture_registrar.cc.

                                        {
  iface->register_texture = register_texture;
  iface->lookup_texture = lookup_texture;
  iface->mark_texture_frame_available = mark_texture_frame_available;
  iface->unregister_texture = unregister_texture;
  iface->shutdown = shutdown;
}

References lookup_texture(), mark_texture_frame_available(), register_texture(), shutdown(), and unregister_texture().

fl_texture_registrar_impl_init()

static void fl_texture_registrar_impl_init ( FlTextureRegistrarImpl *  self )

static

Definition at line 173 of file fl_texture_registrar.cc.

                                                                         {
  self->next_id = 1;
  self->textures = g_hash_table_new_full(g_direct_hash, g_direct_equal, nullptr,
                                         g_object_unref);
  // Initialize the mutex for textures.
  g_mutex_init(&self->textures_mutex);
}

fl_texture_registrar_lookup_texture()

FlTexture* fl_texture_registrar_lookup_texture	(	FlTextureRegistrar *	registrar,
		int64_t	texture_id
	)

fl_texture_registrar_lookup_texture: @registrar: an #FlTextureRegistrar. @texture_id: ID of texture.

Looks for the texture with the given ID.

Returns: an #FlTexture or NULL if no texture with this ID.

Definition at line 190 of file fl_texture_registrar.cc.

                                                                   {
  g_return_val_if_fail(FL_IS_TEXTURE_REGISTRAR(self), NULL);
 
  return FL_TEXTURE_REGISTRAR_GET_IFACE(self)->lookup_texture(self, texture_id);
}

References texture_id.

Referenced by fl_engine_gl_external_texture_frame_callback(), and TEST().

fl_texture_registrar_mark_texture_frame_available()

G_MODULE_EXPORT gboolean fl_texture_registrar_mark_texture_frame_available	(	FlTextureRegistrar *	registrar,
		FlTexture *	texture
	)

fl_texture_registrar_mark_texture_frame_available: @registrar: an #FlTextureRegistrar. @texture: the texture that has a frame available.

Notifies the flutter engine that the texture object has updated and needs to be rerendered.

Returns: TRUE on success.

Definition at line 197 of file fl_texture_registrar.cc.

                        {
  g_return_val_if_fail(FL_IS_TEXTURE_REGISTRAR(self), FALSE);
 
  return FL_TEXTURE_REGISTRAR_GET_IFACE(self)->mark_texture_frame_available(
      self, texture);
}

Referenced by TEST().

fl_texture_registrar_new()

FlTextureRegistrar* fl_texture_registrar_new

(

FlEngine *

engine

)

fl_texture_registrar_new: @engine: an #FlEngine.

Creates a new #FlTextureRegistrar.

Returns: a new #FlTextureRegistrar.

Definition at line 221 of file fl_texture_registrar.cc.

                                                               {
  FlTextureRegistrarImpl* self = FL_TEXTURE_REGISTRAR_IMPL(
      g_object_new(fl_texture_registrar_impl_get_type(), nullptr));
 
  // Added to stop compiler complaining about an unused function.
  FL_IS_TEXTURE_REGISTRAR_IMPL(self);
 
  g_weak_ref_init(&self->engine, G_OBJECT(engine));
 
  return FL_TEXTURE_REGISTRAR(self);
}

Referenced by fl_engine_init(), and TEST().

fl_texture_registrar_register_texture()

G_MODULE_EXPORT gboolean fl_texture_registrar_register_texture	(	FlTextureRegistrar *	registrar,
		FlTexture *	texture
	)

FlTextureRegistrar:

#FlTextureRegistrar is used when registering textures.

Flutter Framework accesses your texture by the related unique texture ID. To draw your texture in Dart, you should add Texture widget in your widget tree with the same texture ID. Use platform channels to send this unique texture ID to the Dart side. fl_texture_registrar_register_texture: @registrar: an #FlTextureRegistrar. @texture: an #FlTexture for registration.

Registers a texture.

Returns: TRUE on success.

Definition at line 181 of file fl_texture_registrar.cc.

                        {
  g_return_val_if_fail(FL_IS_TEXTURE_REGISTRAR(self), FALSE);
  g_return_val_if_fail(FL_IS_TEXTURE(texture), FALSE);
 
  return FL_TEXTURE_REGISTRAR_GET_IFACE(self)->register_texture(self, texture);
}

Referenced by add_mock_texture_to_registrar(), and TEST().

fl_texture_registrar_shutdown()

void fl_texture_registrar_shutdown

(

FlTextureRegistrar *

registrar

)

fl_texture_registrar_shutdown: @registrar: an #FlTextureRegistrar.

Shutdown the registrary and unregister any textures.

Definition at line 215 of file fl_texture_registrar.cc.

                                                             {
  g_return_if_fail(FL_IS_TEXTURE_REGISTRAR(self));
 
  return FL_TEXTURE_REGISTRAR_GET_IFACE(self)->shutdown(self);
}

Referenced by fl_engine_dispose().

fl_texture_registrar_unregister_texture()

G_MODULE_EXPORT gboolean fl_texture_registrar_unregister_texture	(	FlTextureRegistrar *	registrar,
		FlTexture *	texture
	)

fl_texture_registrar_unregister_texture: @registrar: an #FlTextureRegistrar. @texture: the texture being unregistered.

Unregisters an existing texture object.

Returns: TRUE on success.

Definition at line 206 of file fl_texture_registrar.cc.

                        {
  g_return_val_if_fail(FL_IS_TEXTURE_REGISTRAR(self), FALSE);
 
  return FL_TEXTURE_REGISTRAR_GET_IFACE(self)->unregister_texture(self,
                                                                  texture);
}

Referenced by TEST().

G_DECLARE_FINAL_TYPE()

G_DECLARE_FINAL_TYPE	(	FlTextureRegistrarImpl	,
		fl_texture_registrar_impl	,
		FL	,
		TEXTURE_REGISTRAR_IMPL	,
		GObject
	)

Definition at line 16 of file fl_texture_registrar.cc.

                               {
  GObject parent_instance;
 
  // Weak reference to the engine this texture registrar is created for.
  GWeakRef engine;
 
  // ID to assign to the next new texture.
  int64_t next_id;
 
  // Internal record for registered textures.
  //
  // It is a map from Flutter texture ID to #FlTexture instance created by
  // plugins.  The keys are directly stored int64s. The values are stored
  // pointer to #FlTexture.  This table is freed by the responder.
  GHashTable* textures;
 
  // The mutex guard to make `textures` thread-safe.
  GMutex textures_mutex;
};

G_DEFINE_TYPE_WITH_CODE()

G_DEFINE_TYPE_WITH_CODE	(	FlTextureRegistrarImpl	,
		fl_texture_registrar_impl	,
		G_TYPE_OBJECT	,
		G_IMPLEMENT_INTERFACE(fl_texture_registrar_get_type(), fl_texture_registrar_impl_iface_init)
	)

Definition at line 47 of file fl_texture_registrar.cc.

                                        {}

lookup_texture()

static FlTexture* lookup_texture ( FlTextureRegistrar *  registrar, int64_t  texture_id  )

static

Definition at line 107 of file fl_texture_registrar.cc.

                                                     {
  FlTextureRegistrarImpl* self = FL_TEXTURE_REGISTRAR_IMPL(registrar);
  g_mutex_lock(&self->textures_mutex);
  FlTexture* texture = reinterpret_cast<FlTexture*>(
      g_hash_table_lookup(self->textures, GINT_TO_POINTER(texture_id)));
  g_mutex_unlock(&self->textures_mutex);
  return texture;
}

References texture_id.

Referenced by fl_texture_registrar_impl_iface_init().

mark_texture_frame_available()

static gboolean mark_texture_frame_available ( FlTextureRegistrar *  registrar, FlTexture *  texture  )

static

Definition at line 117 of file fl_texture_registrar.cc.

                                                                 {
  FlTextureRegistrarImpl* self = FL_TEXTURE_REGISTRAR_IMPL(registrar);
 
  g_autoptr(FlEngine) engine = FL_ENGINE(g_weak_ref_get(&self->engine));
  if (engine == nullptr) {
    return FALSE;
  }
 
  return fl_engine_mark_texture_frame_available(engine,
                                                fl_texture_get_id(texture));
}

References fl_engine_mark_texture_frame_available(), and fl_texture_get_id().

Referenced by fl_texture_registrar_impl_iface_init(), and G_DECLARE_INTERFACE().

register_texture()

static gboolean register_texture ( FlTextureRegistrar *  registrar, FlTexture *  texture  )

static

Definition at line 75 of file fl_texture_registrar.cc.

                                                     {
  FlTextureRegistrarImpl* self = FL_TEXTURE_REGISTRAR_IMPL(registrar);
 
  if (FL_IS_TEXTURE_GL(texture) || FL_IS_PIXEL_BUFFER_TEXTURE(texture)) {
    g_autoptr(FlEngine) engine = FL_ENGINE(g_weak_ref_get(&self->engine));
    if (engine == nullptr) {
      return FALSE;
    }
 
    // We ideally would use numeric IDs, but for backwards compatibility with
    // existing code use the address of the texture. Once all code uses
    // fl_texture_get_id we can re-enable this method. See
    // https://github.com/flutter/flutter/issues/124009 int64_t id =
    // self->next_id++;
    int64_t id = reinterpret_cast<int64_t>(texture);
    if (fl_engine_register_external_texture(engine, id)) {
      fl_texture_set_id(texture, id);
      g_mutex_lock(&self->textures_mutex);
      g_hash_table_insert(self->textures, GINT_TO_POINTER(id),
                          g_object_ref(texture));
      g_mutex_unlock(&self->textures_mutex);
      return TRUE;
    } else {
      return FALSE;
    }
  } else {
    // We currently only support #FlTextureGL and #FlPixelBufferTexture.
    return FALSE;
  }
}

References fl_engine_register_external_texture(), fl_texture_set_id(), and TRUE.

Referenced by fl_texture_registrar_impl_iface_init(), and G_DECLARE_INTERFACE().

shutdown()

static void shutdown ( FlTextureRegistrar *  registrar )

static

Definition at line 152 of file fl_texture_registrar.cc.

                                                    {
  FlTextureRegistrarImpl* self = FL_TEXTURE_REGISTRAR_IMPL(registrar);
 
  // Unregister any textures.
  g_mutex_lock(&self->textures_mutex);
  g_autoptr(GHashTable) textures = self->textures;
  self->textures = g_hash_table_new_full(g_direct_hash, g_direct_equal, nullptr,
                                         g_object_unref);
  g_hash_table_remove_all(textures);
  g_mutex_unlock(&self->textures_mutex);
}

Referenced by fl_texture_registrar_impl_iface_init().

unregister_texture()

static gboolean unregister_texture ( FlTextureRegistrar *  registrar, FlTexture *  texture  )

static

Definition at line 130 of file fl_texture_registrar.cc.

                                                       {
  FlTextureRegistrarImpl* self = FL_TEXTURE_REGISTRAR_IMPL(registrar);
 
  g_autoptr(FlEngine) engine = FL_ENGINE(g_weak_ref_get(&self->engine));
  if (engine == nullptr) {
    return FALSE;
  }
 
  gboolean result =
      fl_engine_unregister_external_texture(engine, fl_texture_get_id(texture));
 
  g_mutex_lock(&self->textures_mutex);
  if (!g_hash_table_remove(self->textures,
                           GINT_TO_POINTER(fl_texture_get_id(texture)))) {
    g_warning("Unregistering a non-existent texture %p", texture);
  }
  g_mutex_unlock(&self->textures_mutex);
 
  return result;
}

References fl_engine_unregister_external_texture(), fl_texture_get_id(), and result.

Referenced by fl_texture_registrar_impl_iface_init(), and G_DECLARE_INTERFACE().