75b687a9eb
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the onscreen
framebuffer api symbols.
358 lines
12 KiB
C
358 lines
12 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2011 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*
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*
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* Authors:
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* Robert Bragg <robert@linux.intel.com>
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*/
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#if !defined(__COGL_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <cogl/cogl.h> can be included directly."
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#endif
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#ifndef __COGL_ONSCREEN_H
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#define __COGL_ONSCREEN_H
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#include <cogl/cogl-context.h>
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#include <cogl/cogl-framebuffer.h>
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#include <glib.h>
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G_BEGIN_DECLS
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typedef struct _CoglOnscreen CoglOnscreen;
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#define COGL_ONSCREEN(X) ((CoglOnscreen *)(X))
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/**
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* cogl_onscreen_new:
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* @context: A #CoglContext
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* @width: The desired framebuffer width
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* @height: The desired framebuffer height
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*
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* Instantiates an "unallocated" #CoglOnscreen framebuffer that may be
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* configured before later being allocated, either implicitly when
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* it is first used or explicitly via cogl_framebuffer_allocate().
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*
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* Return value: A newly instantiated #CoglOnscreen framebuffer
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* Since: 1.8
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* Stability: unstable
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*/
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CoglOnscreen *
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cogl_onscreen_new (CoglContext *context, int width, int height);
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#ifdef COGL_HAS_X11
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typedef void (*CoglOnscreenX11MaskCallback) (CoglOnscreen *onscreen,
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guint32 event_mask,
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void *user_data);
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/**
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* cogl_x11_onscreen_set_foreign_window_xid:
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* @onscreen: The unallocated framebuffer to associated with an X
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* window.
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* @xid: The XID of an existing X window
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* @update: A callback that notifies of updates to what Cogl requires
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* to be in the core X protocol event mask.
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*
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* Ideally we would recommend that you let Cogl be responsible for
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* creating any X window required to back an onscreen framebuffer but
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* if you really need to target a window created manually this
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* function can be called before @onscreen has been allocated to set a
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* foreign XID for your existing X window.
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*
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* Since Cogl needs, for example, to track changes to the size of an X
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* window it requires that certain events be selected for via the core
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* X protocol. This requirement may also be changed asynchronously so
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* you must pass in an @update callback to inform you of Cogl's
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* required event mask.
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*
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* For example if you are using Xlib you could use this API roughly
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* as follows:
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* [{
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* static void
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* my_update_cogl_x11_event_mask (CoglOnscreen *onscreen,
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* guint32 event_mask,
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* void *user_data)
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* {
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* XSetWindowAttributes attrs;
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* MyData *data = user_data;
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* attrs.event_mask = event_mask | data->my_event_mask;
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* XChangeWindowAttributes (data->xdpy,
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* data->xwin,
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* CWEventMask,
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* &attrs);
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* }
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*
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* {
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* *snip*
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* cogl_x11_onscreen_set_foreign_window_xid (onscreen,
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* data->xwin,
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* my_update_cogl_x11_event_mask,
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* data);
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* *snip*
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* }
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* }]
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*
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* Since: 2.0
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* Stability: Unstable
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*/
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void
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cogl_x11_onscreen_set_foreign_window_xid (CoglOnscreen *onscreen,
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guint32 xid,
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CoglOnscreenX11MaskCallback update,
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void *user_data);
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/**
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* cogl_x11_onscreen_get_window_xid:
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* @onscreen: A #CoglOnscreen framebuffer
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*
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* Assuming you know the given @onscreen framebuffer is based on an x11 window
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* this queries the XID of that window. If
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* cogl_x11_onscreen_set_foreign_window_xid() was previously called then it
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* will return that same XID otherwise it will be the XID of a window Cogl
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* created internally. If the window has not been allocated yet and a foreign
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* xid has not been set then it's undefined what value will be returned.
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*
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* It's undefined what this function does if called when not using an x11 based
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* renderer.
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*
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* Since: 1.10
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* Stability: unstable
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*/
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guint32
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cogl_x11_onscreen_get_window_xid (CoglOnscreen *onscreen);
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/* XXX: we should maybe remove this, since nothing currently uses
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* it and the current implementation looks dubious. */
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guint32
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cogl_x11_onscreen_get_visual_xid (CoglOnscreen *onscreen);
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#endif /* COGL_HAS_X11 */
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#ifdef COGL_HAS_WIN32_SUPPORT
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/**
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* cogl_win32_onscreen_set_foreign_window:
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* @onscreen: A #CoglOnscreen framebuffer
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* @hwnd: A win32 window handle
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*
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* Ideally we would recommend that you let Cogl be responsible for
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* creating any window required to back an onscreen framebuffer but
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* if you really need to target a window created manually this
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* function can be called before @onscreen has been allocated to set a
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* foreign XID for your existing X window.
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*
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* Since: 1.10
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* Stability: unstable
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*/
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void
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cogl_win32_onscreen_set_foreign_window (CoglOnscreen *onscreen,
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HWND hwnd);
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/**
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* cogl_win32_onscreen_get_window:
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* @onscreen: A #CoglOnscreen framebuffer
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*
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* Queries the internally created window HWND backing the given @onscreen
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* framebuffer. If cogl_win32_onscreen_set_foreign_window() has been used then
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* it will return the same handle set with that API.
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*
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* Since: 1.10
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* Stability: unstable
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*/
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HWND
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cogl_win32_onscreen_get_window (CoglOnscreen *onscreen);
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#endif /* COGL_HAS_WIN32_SUPPORT */
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#if defined (COGL_HAS_EGL_PLATFORM_WAYLAND_SUPPORT)
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struct wl_surface *
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cogl_wayland_onscreen_get_surface (CoglOnscreen *onscreen);
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struct wl_shell_surface *
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cogl_wayland_onscreen_get_shell_surface (CoglOnscreen *onscreen);
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void
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cogl_wayland_onscreen_resize (CoglOnscreen *onscreen,
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gint width,
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gint height,
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gint offset_x,
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gint offset_y);
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#endif /* COGL_HAS_EGL_PLATFORM_WAYLAND_SUPPORT */
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/**
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* cogl_onscreen_set_swap_throttled:
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* @onscreen: A #CoglOncsreen framebuffer
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* @throttled: Whether swap throttling is wanted or not.
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*
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* Requests that the given @onscreen framebuffer should have swap buffer
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* requests (made using cogl_framebuffer_swap_buffers()) throttled either by a
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* displays vblank period or perhaps some other mechanism in a composited
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* environment.
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*
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* Since: 1.8
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* Stability: unstable
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*/
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void
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cogl_onscreen_set_swap_throttled (CoglOnscreen *onscreen,
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gboolean throttled);
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/**
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* cogl_onscreen_show:
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* @onscreen: The onscreen framebuffer to make visible
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*
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* This requests to make @onscreen visible to the user.
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*
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* Actually the precise semantics of this function depend on the
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* window system currently in use, and if you don't have a
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* multi-windowining system this function may in-fact do nothing.
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*
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* This function will implicitly allocate the given @onscreen
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* framebuffer before showing it if it hasn't already been allocated.
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*
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* <note>Since Cogl doesn't explicitly track the visibility status of
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* onscreen framebuffers it wont try to avoid redundant window system
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* requests e.g. to show an already visible window. This also means
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* that it's acceptable to alternatively use native APIs to show and
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* hide windows without confusing Cogl.</note>
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*
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* Since: 2.0
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* Stability: Unstable
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*/
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void
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cogl_onscreen_show (CoglOnscreen *onscreen);
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/**
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* cogl_onscreen_hide:
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* @onscreen: The onscreen framebuffer to make invisible
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*
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* This requests to make @onscreen invisible to the user.
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*
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* Actually the precise semantics of this function depend on the
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* window system currently in use, and if you don't have a
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* multi-windowining system this function may in-fact do nothing.
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*
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* This function does not implicitly allocate the given @onscreen
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* framebuffer before hiding it.
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*
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* <note>Since Cogl doesn't explicitly track the visibility status of
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* onscreen framebuffers it wont try to avoid redundant window system
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* requests e.g. to show an already visible window. This also means
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* that it's acceptable to alternatively use native APIs to show and
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* hide windows without confusing Cogl.</note>
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*
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* Since: 2.0
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* Stability: Unstable
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*/
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void
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cogl_onscreen_hide (CoglOnscreen *onscreen);
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/* XXX: Actually should this be renamed too cogl_onscreen_swap_buffers()? */
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/**
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* cogl_framebuffer_swap_buffers:
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* @framebuffer: A #CoglFramebuffer
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*
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* Swaps the current back buffer being rendered too, to the front for display.
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*
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* This function also implicitly discards the contents of the color, depth and
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* stencil buffers as if cogl_framebuffer_discard_buffers() were used. The
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* significance of the discard is that you should not expect to be able to
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* start a new frame that incrementally builds on the contents of the previous
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* frame.
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*
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* Since: 1.8
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* Stability: unstable
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*/
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void
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cogl_framebuffer_swap_buffers (CoglFramebuffer *framebuffer);
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/**
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* cogl_framebuffer_swap_region:
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* @framebuffer: A #CoglFramebuffer
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* @rectangles: An array of integer 4-tuples representing rectangles as
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* (x, y, width, height) tuples.
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* @n_rectangles: The number of 4-tuples to be read from @rectangles
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*
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* Swaps a region of the back buffer being rendered too, to the front for
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* display. @rectangles represents the region as array of @n_rectangles each
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* defined by 4 sequential (x, y, width, height) integers.
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*
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* This function also implicitly discards the contents of the color, depth and
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* stencil buffers as if cogl_framebuffer_discard_buffers() were used. The
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* significance of the discard is that you should not expect to be able to
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* start a new frame that incrementally builds on the contents of the previous
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* frame.
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*
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* Since: 1.8
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* Stability: unstable
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*/
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void
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cogl_framebuffer_swap_region (CoglFramebuffer *framebuffer,
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const int *rectangles,
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int n_rectangles);
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typedef void (*CoglSwapBuffersNotify) (CoglFramebuffer *framebuffer,
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void *user_data);
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/**
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* cogl_framebuffer_add_swap_buffers_callback:
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* @framebuffer A #CoglFramebuffer
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* @callback: A callback function to call when a swap has completed
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* @user_data: A private pointer to be passed to @callback
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*
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* Installs a @callback function that should be called whenever a swap buffers
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* request (made using cogl_framebuffer_swap_buffers()) for the given
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* @framebuffer completes.
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*
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* <note>Applications should check for the %COGL_FEATURE_ID_SWAP_BUFFERS_EVENT
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* feature before using this API. It's currently undefined when and if
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* registered callbacks will be called if this feature is not supported.</note>
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*
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* We recommend using this mechanism when available to manually throttle your
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* applications (in conjunction with cogl_onscreen_set_swap_throttled()) so
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* your application will be able to avoid long blocks in the driver caused by
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* throttling when you request to swap buffers too quickly.
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*
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* Return value: a unique identifier that can be used to remove to remove
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* the callback later.
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* Since: 1.10
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* Stability: unstable
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*/
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unsigned int
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cogl_framebuffer_add_swap_buffers_callback (CoglFramebuffer *framebuffer,
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CoglSwapBuffersNotify callback,
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void *user_data);
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/**
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* cogl_framebuffer_remove_swap_buffers_callback:
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* @framebuffer:
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* @id: An identifier returned from cogl_framebuffer_add_swap_buffers_callback()
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*
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* Removes a callback that was previously registered
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* using cogl_framebuffer_add_swap_buffers_callback().
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*
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* Since: 1.10
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* Stability: unstable
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*/
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void
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cogl_framebuffer_remove_swap_buffers_callback (CoglFramebuffer *framebuffer,
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unsigned int id);
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G_END_DECLS
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#endif /* __COGL_ONSCREEN_H */
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