mirror of
https://github.com/brl/mutter.git
synced 2024-12-25 12:32:05 +00:00
479c5fd2c9
This moves all the cogl_framebuffer_ apis relating to swap buffer requests into the cogl_onscreen_ namespace since on CoglOnscreen framebuffers have back buffers that can be swapped. Reviewed-by: Neil Roberts <neil@linux.intel.com>
386 lines
14 KiB
C
386 lines
14 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2011,2012 Intel Corporation.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see
|
|
* <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
*
|
|
* Authors:
|
|
* Robert Bragg <robert@linux.intel.com>
|
|
*/
|
|
|
|
#if !defined(__COGL_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
|
|
#error "Only <cogl/cogl.h> can be included directly."
|
|
#endif
|
|
|
|
#ifndef __COGL_ONSCREEN_H
|
|
#define __COGL_ONSCREEN_H
|
|
|
|
#include <cogl/cogl-context.h>
|
|
#include <cogl/cogl-framebuffer.h>
|
|
#include <glib.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
typedef struct _CoglOnscreen CoglOnscreen;
|
|
#define COGL_ONSCREEN(X) ((CoglOnscreen *)(X))
|
|
|
|
/**
|
|
* cogl_onscreen_new:
|
|
* @context: A #CoglContext
|
|
* @width: The desired framebuffer width
|
|
* @height: The desired framebuffer height
|
|
*
|
|
* Instantiates an "unallocated" #CoglOnscreen framebuffer that may be
|
|
* configured before later being allocated, either implicitly when
|
|
* it is first used or explicitly via cogl_framebuffer_allocate().
|
|
*
|
|
* Return value: A newly instantiated #CoglOnscreen framebuffer
|
|
* Since: 1.8
|
|
* Stability: unstable
|
|
*/
|
|
CoglOnscreen *
|
|
cogl_onscreen_new (CoglContext *context, int width, int height);
|
|
|
|
#ifdef COGL_HAS_X11
|
|
typedef void (*CoglOnscreenX11MaskCallback) (CoglOnscreen *onscreen,
|
|
guint32 event_mask,
|
|
void *user_data);
|
|
|
|
/**
|
|
* cogl_x11_onscreen_set_foreign_window_xid:
|
|
* @onscreen: The unallocated framebuffer to associated with an X
|
|
* window.
|
|
* @xid: The XID of an existing X window
|
|
* @update: A callback that notifies of updates to what Cogl requires
|
|
* to be in the core X protocol event mask.
|
|
*
|
|
* Ideally we would recommend that you let Cogl be responsible for
|
|
* creating any X window required to back an onscreen framebuffer but
|
|
* if you really need to target a window created manually this
|
|
* function can be called before @onscreen has been allocated to set a
|
|
* foreign XID for your existing X window.
|
|
*
|
|
* Since Cogl needs, for example, to track changes to the size of an X
|
|
* window it requires that certain events be selected for via the core
|
|
* X protocol. This requirement may also be changed asynchronously so
|
|
* you must pass in an @update callback to inform you of Cogl's
|
|
* required event mask.
|
|
*
|
|
* For example if you are using Xlib you could use this API roughly
|
|
* as follows:
|
|
* [{
|
|
* static void
|
|
* my_update_cogl_x11_event_mask (CoglOnscreen *onscreen,
|
|
* guint32 event_mask,
|
|
* void *user_data)
|
|
* {
|
|
* XSetWindowAttributes attrs;
|
|
* MyData *data = user_data;
|
|
* attrs.event_mask = event_mask | data->my_event_mask;
|
|
* XChangeWindowAttributes (data->xdpy,
|
|
* data->xwin,
|
|
* CWEventMask,
|
|
* &attrs);
|
|
* }
|
|
*
|
|
* {
|
|
* *snip*
|
|
* cogl_x11_onscreen_set_foreign_window_xid (onscreen,
|
|
* data->xwin,
|
|
* my_update_cogl_x11_event_mask,
|
|
* data);
|
|
* *snip*
|
|
* }
|
|
* }]
|
|
*
|
|
* Since: 2.0
|
|
* Stability: Unstable
|
|
*/
|
|
void
|
|
cogl_x11_onscreen_set_foreign_window_xid (CoglOnscreen *onscreen,
|
|
guint32 xid,
|
|
CoglOnscreenX11MaskCallback update,
|
|
void *user_data);
|
|
|
|
/**
|
|
* cogl_x11_onscreen_get_window_xid:
|
|
* @onscreen: A #CoglOnscreen framebuffer
|
|
*
|
|
* Assuming you know the given @onscreen framebuffer is based on an x11 window
|
|
* this queries the XID of that window. If
|
|
* cogl_x11_onscreen_set_foreign_window_xid() was previously called then it
|
|
* will return that same XID otherwise it will be the XID of a window Cogl
|
|
* created internally. If the window has not been allocated yet and a foreign
|
|
* xid has not been set then it's undefined what value will be returned.
|
|
*
|
|
* It's undefined what this function does if called when not using an x11 based
|
|
* renderer.
|
|
*
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
guint32
|
|
cogl_x11_onscreen_get_window_xid (CoglOnscreen *onscreen);
|
|
|
|
/* XXX: we should maybe remove this, since nothing currently uses
|
|
* it and the current implementation looks dubious. */
|
|
guint32
|
|
cogl_x11_onscreen_get_visual_xid (CoglOnscreen *onscreen);
|
|
#endif /* COGL_HAS_X11 */
|
|
|
|
#ifdef COGL_HAS_WIN32_SUPPORT
|
|
/**
|
|
* cogl_win32_onscreen_set_foreign_window:
|
|
* @onscreen: A #CoglOnscreen framebuffer
|
|
* @hwnd: A win32 window handle
|
|
*
|
|
* Ideally we would recommend that you let Cogl be responsible for
|
|
* creating any window required to back an onscreen framebuffer but
|
|
* if you really need to target a window created manually this
|
|
* function can be called before @onscreen has been allocated to set a
|
|
* foreign XID for your existing X window.
|
|
*
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
void
|
|
cogl_win32_onscreen_set_foreign_window (CoglOnscreen *onscreen,
|
|
HWND hwnd);
|
|
|
|
/**
|
|
* cogl_win32_onscreen_get_window:
|
|
* @onscreen: A #CoglOnscreen framebuffer
|
|
*
|
|
* Queries the internally created window HWND backing the given @onscreen
|
|
* framebuffer. If cogl_win32_onscreen_set_foreign_window() has been used then
|
|
* it will return the same handle set with that API.
|
|
*
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
HWND
|
|
cogl_win32_onscreen_get_window (CoglOnscreen *onscreen);
|
|
#endif /* COGL_HAS_WIN32_SUPPORT */
|
|
|
|
#if defined (COGL_HAS_EGL_PLATFORM_WAYLAND_SUPPORT)
|
|
struct wl_surface *
|
|
cogl_wayland_onscreen_get_surface (CoglOnscreen *onscreen);
|
|
struct wl_shell_surface *
|
|
cogl_wayland_onscreen_get_shell_surface (CoglOnscreen *onscreen);
|
|
|
|
/**
|
|
* cogl_wayland_onscreen_resize:
|
|
* @onscreen: A #CoglOnscreen framebuffer
|
|
* @width: The desired width of the framebuffer
|
|
* @height: The desired height of the framebuffer
|
|
* @offset_x: A relative x offset for the new framebuffer
|
|
* @offset_y: A relative x offset for the new framebuffer
|
|
*
|
|
* Queues a resize of the given @onscreen framebuffer which will be applied
|
|
* during the next swap buffers request. Since a buffer is usually conceptually
|
|
* scaled with a center point the @offset_x and @offset_y arguments allow the
|
|
* newly allocated buffer to be positioned relative to the old buffer size.
|
|
*
|
|
* For example a buffer that is being resized by moving the bottom right
|
|
* corner, and the top left corner is remaining static would use x and y
|
|
* offsets of (0, 0) since the top-left of the new buffer should have the same
|
|
* position as the old buffer. If the center of the old buffer is being zoomed
|
|
* into then all the corners of the new buffer move out from the center and the x
|
|
* and y offsets would be (-half_x_size_increase, -half_y_size_increase) where
|
|
* x/y_size_increase is how many pixels bigger the buffer is on the x and y
|
|
* axis.
|
|
*
|
|
* If cogl_wayland_onscreen_resize() is called multiple times before the next
|
|
* swap buffers request then the relative x and y offsets accumulate instead of
|
|
* being replaced. The @width and @height values superseed the old values.
|
|
*
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
void
|
|
cogl_wayland_onscreen_resize (CoglOnscreen *onscreen,
|
|
int width,
|
|
int height,
|
|
int offset_x,
|
|
int offset_y);
|
|
#endif /* COGL_HAS_EGL_PLATFORM_WAYLAND_SUPPORT */
|
|
|
|
/**
|
|
* cogl_onscreen_set_swap_throttled:
|
|
* @onscreen: A #CoglOncsreen framebuffer
|
|
* @throttled: Whether swap throttling is wanted or not.
|
|
*
|
|
* Requests that the given @onscreen framebuffer should have swap buffer
|
|
* requests (made using cogl_framebuffer_swap_buffers()) throttled either by a
|
|
* displays vblank period or perhaps some other mechanism in a composited
|
|
* environment.
|
|
*
|
|
* Since: 1.8
|
|
* Stability: unstable
|
|
*/
|
|
void
|
|
cogl_onscreen_set_swap_throttled (CoglOnscreen *onscreen,
|
|
gboolean throttled);
|
|
|
|
/**
|
|
* cogl_onscreen_show:
|
|
* @onscreen: The onscreen framebuffer to make visible
|
|
*
|
|
* This requests to make @onscreen visible to the user.
|
|
*
|
|
* Actually the precise semantics of this function depend on the
|
|
* window system currently in use, and if you don't have a
|
|
* multi-windowining system this function may in-fact do nothing.
|
|
*
|
|
* This function will implicitly allocate the given @onscreen
|
|
* framebuffer before showing it if it hasn't already been allocated.
|
|
*
|
|
* <note>Since Cogl doesn't explicitly track the visibility status of
|
|
* onscreen framebuffers it wont try to avoid redundant window system
|
|
* requests e.g. to show an already visible window. This also means
|
|
* that it's acceptable to alternatively use native APIs to show and
|
|
* hide windows without confusing Cogl.</note>
|
|
*
|
|
* Since: 2.0
|
|
* Stability: Unstable
|
|
*/
|
|
void
|
|
cogl_onscreen_show (CoglOnscreen *onscreen);
|
|
|
|
/**
|
|
* cogl_onscreen_hide:
|
|
* @onscreen: The onscreen framebuffer to make invisible
|
|
*
|
|
* This requests to make @onscreen invisible to the user.
|
|
*
|
|
* Actually the precise semantics of this function depend on the
|
|
* window system currently in use, and if you don't have a
|
|
* multi-windowining system this function may in-fact do nothing.
|
|
*
|
|
* This function does not implicitly allocate the given @onscreen
|
|
* framebuffer before hiding it.
|
|
*
|
|
* <note>Since Cogl doesn't explicitly track the visibility status of
|
|
* onscreen framebuffers it wont try to avoid redundant window system
|
|
* requests e.g. to show an already visible window. This also means
|
|
* that it's acceptable to alternatively use native APIs to show and
|
|
* hide windows without confusing Cogl.</note>
|
|
*
|
|
* Since: 2.0
|
|
* Stability: Unstable
|
|
*/
|
|
void
|
|
cogl_onscreen_hide (CoglOnscreen *onscreen);
|
|
|
|
/**
|
|
* cogl_onscreen_swap_buffers:
|
|
* @onscreen: A #CoglOnscreen framebuffer
|
|
*
|
|
* Swaps the current back buffer being rendered too, to the front for display.
|
|
*
|
|
* This function also implicitly discards the contents of the color, depth and
|
|
* stencil buffers as if cogl_framebuffer_discard_buffers() were used. The
|
|
* significance of the discard is that you should not expect to be able to
|
|
* start a new frame that incrementally builds on the contents of the previous
|
|
* frame.
|
|
*
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
void
|
|
cogl_onscreen_swap_buffers (CoglOnscreen *onscreen);
|
|
|
|
/**
|
|
* cogl_onscreen_swap_region:
|
|
* @onscreen: A #CoglOnscreen framebuffer
|
|
* @rectangles: An array of integer 4-tuples representing rectangles as
|
|
* (x, y, width, height) tuples.
|
|
* @n_rectangles: The number of 4-tuples to be read from @rectangles
|
|
*
|
|
* Swaps a region of the back buffer being rendered too, to the front for
|
|
* display. @rectangles represents the region as array of @n_rectangles each
|
|
* defined by 4 sequential (x, y, width, height) integers.
|
|
*
|
|
* This function also implicitly discards the contents of the color, depth and
|
|
* stencil buffers as if cogl_onscreen_discard_buffers() were used. The
|
|
* significance of the discard is that you should not expect to be able to
|
|
* start a new frame that incrementally builds on the contents of the previous
|
|
* frame.
|
|
*
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
void
|
|
cogl_onscreen_swap_region (CoglOnscreen *onscreen,
|
|
const int *rectangles,
|
|
int n_rectangles);
|
|
|
|
|
|
typedef void (*CoglSwapBuffersNotify) (CoglFramebuffer *framebuffer,
|
|
void *user_data);
|
|
|
|
/**
|
|
* cogl_onscreen_add_swap_buffers_callback:
|
|
* @onscreen: A #CoglOnscreen framebuffer
|
|
* @callback: A callback function to call when a swap has completed
|
|
* @user_data: A private pointer to be passed to @callback
|
|
*
|
|
* Installs a @callback function that should be called whenever a swap buffers
|
|
* request (made using cogl_onscreen_swap_buffers()) for the given
|
|
* @onscreen completes.
|
|
*
|
|
* <note>Applications should check for the %COGL_FEATURE_ID_SWAP_BUFFERS_EVENT
|
|
* feature before using this API. It's currently undefined when and if
|
|
* registered callbacks will be called if this feature is not supported.</note>
|
|
*
|
|
* We recommend using this mechanism when available to manually throttle your
|
|
* applications (in conjunction with cogl_onscreen_set_swap_throttled()) so
|
|
* your application will be able to avoid long blocks in the driver caused by
|
|
* throttling when you request to swap buffers too quickly.
|
|
*
|
|
* Return value: a unique identifier that can be used to remove to remove
|
|
* the callback later.
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
unsigned int
|
|
cogl_onscreen_add_swap_buffers_callback (CoglOnscreen *onscreen,
|
|
CoglSwapBuffersNotify callback,
|
|
void *user_data);
|
|
|
|
/**
|
|
* cogl_onscreen_remove_swap_buffers_callback:
|
|
* @onscreen: A #CoglOnscreen framebuffer
|
|
* @id: An identifier returned from cogl_onscreen_add_swap_buffers_callback()
|
|
*
|
|
* Removes a callback that was previously registered
|
|
* using cogl_onscreen_add_swap_buffers_callback().
|
|
*
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
void
|
|
cogl_onscreen_remove_swap_buffers_callback (CoglOnscreen *onscreen,
|
|
unsigned int id);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __COGL_ONSCREEN_H */
|