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gstreamer/gst-libs/gst/gl/gstglwindow.h
Philippe Normand 5a4c5e9169 gl/navigation: Scroll events dispatch support
2020-03-19 09:59:47 +00:00

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/*
* GStreamer
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
* Copyright (C) 2012 Matthew Waters <ystreet00@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_GL_WINDOW_H__
#define __GST_GL_WINDOW_H__
#include <gst/gst.h>
#include <gst/gl/gstgl_fwd.h>
#include <gst/gl/gstglcontext.h>
#include <gst/gl/gstgldisplay.h>
G_BEGIN_DECLS
GST_GL_API
GType gst_gl_window_get_type (void);
#define GST_TYPE_GL_WINDOW (gst_gl_window_get_type())
#define GST_GL_WINDOW(o) (G_TYPE_CHECK_INSTANCE_CAST((o), GST_TYPE_GL_WINDOW, GstGLWindow))
#define GST_GL_WINDOW_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), GST_TYPE_GL_WINDOW, GstGLWindowClass))
#define GST_IS_GL_WINDOW(o) (G_TYPE_CHECK_INSTANCE_TYPE((o), GST_TYPE_GL_WINDOW))
#define GST_IS_GL_WINDOW_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE((k), GST_TYPE_GL_WINDOW))
#define GST_GL_WINDOW_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS((o), GST_TYPE_GL_WINDOW, GstGLWindowClass))
#define GST_GL_WINDOW_LOCK(w) g_mutex_lock(&GST_GL_WINDOW(w)->lock)
#define GST_GL_WINDOW_UNLOCK(w) g_mutex_unlock(&GST_GL_WINDOW(w)->lock)
#define GST_GL_WINDOW_GET_LOCK(w) (&GST_GL_WINDOW(w)->lock)
GST_GL_API
GQuark gst_gl_window_error_quark (void);
/**
* GST_GL_WINDOW_ERROR:
*
* Error domain for GStreamer's GL window module. Errors in this domain will be
* from the #GstGLWindowError enumeration
*/
#define GST_GL_WINDOW_ERROR (gst_gl_window_error_quark ())
/**
* GstGLWindowError:
* @GST_GL_WINDOW_ERROR_FAILED: failed for a unspecified reason
* @GST_GL_WINDOW_ERROR_OLD_LIBS: the implementation is too old
* @GST_GL_WINDOW_ERROR_RESOURCE_UNAVAILABLE: no such resource was found
*/
typedef enum
{
GST_GL_WINDOW_ERROR_FAILED,
GST_GL_WINDOW_ERROR_OLD_LIBS,
GST_GL_WINDOW_ERROR_RESOURCE_UNAVAILABLE,
} GstGLWindowError;
typedef void (*GstGLWindowCB) (gpointer data);
typedef void (*GstGLWindowResizeCB) (gpointer data, guint width, guint height);
/**
* GST_GL_WINDOW_CB:
* @f: the function to cast
*
* Cast to the current function type for generic window callbacks
*/
#define GST_GL_WINDOW_CB(f) ((GstGLWindowCB) (f))
/**
* GST_GL_WINDOW_RESIZE_CB:
* @f: the function to cast
*
* Cast to the current function type for window resize callbacks
*/
#define GST_GL_WINDOW_RESIZE_CB(f) ((GstGLWindowResizeCB) (f))
/**
* GstGLWindow:
*
* #GstGLWindow is an opaque struct and should only be accessed through the
* provided api.
*/
struct _GstGLWindow {
/*< private >*/
GstObject parent;
GMutex lock;
GstGLDisplay *display;
GWeakRef context_ref;
/*< protected >*/
gboolean is_drawing;
GstGLWindowCB draw;
gpointer draw_data;
GDestroyNotify draw_notify;
GstGLWindowCB close;
gpointer close_data;
GDestroyNotify close_notify;
GstGLWindowResizeCB resize;
gpointer resize_data;
GDestroyNotify resize_notify;
gboolean queue_resize;
GMainContext *main_context; /* default main_context */
/*< private >*/
GstGLWindowPrivate *priv;
gpointer _reserved[GST_PADDING];
};
/**
* GstGLWindowClass:
* @parent_class: Parent class
* @get_display: Gets the current windowing system display connection
* @set_window_handle: Set a window handle to render into
* @get_window_handle: Gets the current window handle that this #GstGLWindow is
* rendering into. This may return a different value to
* what is passed into @set_window_handle
* @draw: redraw the window with the specified dimensions
* @run: run the mainloop
* @quit: send a quit to the mainloop
* @send_message: invoke a function on the window thread. Required to be reentrant.
* @send_message_async: invoke a function on the window thread. @run may or may
* not have been called. Required to be reentrant.
* @open: open the connection to the display
* @close: close the connection to the display
* @handle_events: whether to handle 'extra' events from the windowing system.
* Basic events like surface moves and resizes are still valid
* things to listen for.
* @set_preferred_size: request that the window change surface size. The
* implementation is free to ignore this information.
* @show: request that the window be shown to the user
* @set_render_rectangle: request a rectangle to render into. See #GstVideoOverlay
* @queue_resize: request a resize to occur when possible
* @controls_viewport: Whether the window takes care of glViewport setup.
* and the user does not need to deal with viewports
* @has_output_surface: Whether the window has output surface or not. (Since: 1.18)
*/
struct _GstGLWindowClass {
GstObjectClass parent_class;
guintptr (*get_display) (GstGLWindow *window);
void (*set_window_handle) (GstGLWindow *window, guintptr handle);
guintptr (*get_window_handle) (GstGLWindow *window);
void (*draw) (GstGLWindow *window);
void (*run) (GstGLWindow *window);
void (*quit) (GstGLWindow *window);
void (*send_message) (GstGLWindow *window, GstGLWindowCB callback, gpointer data);
void (*send_message_async) (GstGLWindow *window, GstGLWindowCB callback, gpointer data, GDestroyNotify destroy);
gboolean (*open) (GstGLWindow *window, GError **error);
void (*close) (GstGLWindow *window);
void (*handle_events) (GstGLWindow *window, gboolean handle_events);
void (*set_preferred_size) (GstGLWindow *window, gint width, gint height);
void (*show) (GstGLWindow *window);
gboolean (*set_render_rectangle)(GstGLWindow *window, gint x, gint y, gint width, gint height);
void (*queue_resize) (GstGLWindow *window);
gboolean (*controls_viewport) (GstGLWindow *window);
gboolean (*has_output_surface) (GstGLWindow *window);
/*< private >*/
gpointer _reserved[GST_PADDING-2];
};
GST_GL_API
GstGLWindow * gst_gl_window_new (GstGLDisplay *display);
/* callbacks */
GST_GL_API
void gst_gl_window_set_draw_callback (GstGLWindow *window,
GstGLWindowCB callback,
gpointer data,
GDestroyNotify destroy_notify);
GST_GL_API
void gst_gl_window_set_resize_callback (GstGLWindow *window,
GstGLWindowResizeCB callback,
gpointer data,
GDestroyNotify destroy_notify);
GST_GL_API
void gst_gl_window_set_close_callback (GstGLWindow *window,
GstGLWindowCB callback,
gpointer data,
GDestroyNotify destroy_notify);
GST_GL_API
void gst_gl_window_set_window_handle (GstGLWindow *window, guintptr handle);
GST_GL_API
guintptr gst_gl_window_get_window_handle (GstGLWindow *window);
/* loop/events */
GST_GL_API
void gst_gl_window_run (GstGLWindow *window);
GST_GL_API
void gst_gl_window_quit (GstGLWindow *window);
GST_GL_API
void gst_gl_window_send_message (GstGLWindow *window,
GstGLWindowCB callback,
gpointer data);
GST_GL_API
void gst_gl_window_send_message_async (GstGLWindow *window,
GstGLWindowCB callback,
gpointer data,
GDestroyNotify destroy);
/* navigation */
GST_GL_API
void gst_gl_window_handle_events (GstGLWindow * window,
gboolean handle_events);
GST_GL_API
void gst_gl_window_send_key_event (GstGLWindow * window,
const char * event_type,
const char * key_str);
GST_GL_API
void gst_gl_window_send_mouse_event (GstGLWindow * window,
const char * event_type,
int button,
double posx,
double posy);
GST_GL_API
void gst_gl_window_send_scroll_event (GstGLWindow * window,
double posx,
double posy,
double delta_x,
double delta_y);
/* surfaces/rendering */
GST_GL_API
void gst_gl_window_queue_resize (GstGLWindow *window);
GST_GL_API
void gst_gl_window_draw (GstGLWindow *window);
GST_GL_API
void gst_gl_window_show (GstGLWindow *window);
GST_GL_API
void gst_gl_window_set_preferred_size (GstGLWindow * window,
gint width,
gint height);
GST_GL_API
void gst_gl_window_get_surface_dimensions (GstGLWindow * window,
guint * width,
guint * height);
GST_GL_API
gboolean gst_gl_window_set_render_rectangle (GstGLWindow * window,
gint x,
gint y,
gint width,
gint height);
GST_GL_API
gboolean gst_gl_window_controls_viewport (GstGLWindow * window);
/* subclass usage only */
GST_GL_API
void gst_gl_window_resize (GstGLWindow *window, guint width, guint height);
GST_GL_API
GstGLContext * gst_gl_window_get_context (GstGLWindow *window);
GST_GL_API
guintptr gst_gl_window_get_display (GstGLWindow *window);
GST_GL_API
gboolean gst_gl_window_has_output_surface (GstGLWindow *window);
G_END_DECLS
#endif /* __GST_GL_WINDOW_H__ */
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