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038aac6275
This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
161 lines
4.0 KiB
C
161 lines
4.0 KiB
C
/*
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* gdkdisplay-x11.h
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*
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* Copyright 2001 Sun Microsystems Inc.
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*
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* Erwann Chenede <erwann.chenede@sun.com>
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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 Library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GDK_X11_DISPLAY__
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#define __GDK_X11_DISPLAY__
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#include "gdkdisplayprivate.h"
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#include "gdkkeys.h"
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#include "gdkwindow.h"
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#include "gdkinternals.h"
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#include "gdkmain.h"
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#include <X11/X.h>
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#include <X11/Xlib.h>
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G_BEGIN_DECLS
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struct _GdkX11Display
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{
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GdkDisplay parent_instance;
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Display *xdisplay;
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GdkScreen *screen;
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GSource *event_source;
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gint grab_count;
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/* Keyboard related information */
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gint xkb_event_type;
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gboolean use_xkb;
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/* Whether we were able to turn on detectable-autorepeat using
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* XkbSetDetectableAutorepeat. If FALSE, we'll fall back
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* to checking the next event with XPending().
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*/
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gboolean have_xkb_autorepeat;
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GdkKeymap *keymap;
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guint keymap_serial;
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gboolean have_xfixes;
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gint xfixes_event_base;
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gboolean have_xcomposite;
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gboolean have_xdamage;
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gint xdamage_event_base;
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gboolean have_randr12;
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gboolean have_randr13;
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gint xrandr_event_base;
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/* If the SECURITY extension is in place, whether this client holds
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* a trusted authorization and so is allowed to make various requests
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* (grabs, properties etc.) Otherwise always TRUE.
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*/
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gboolean trusted_client;
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/* drag and drop information */
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GdkDragContext *current_dest_drag;
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/* Mapping to/from virtual atoms */
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GHashTable *atom_from_virtual;
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GHashTable *atom_to_virtual;
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/* Session Management leader window see ICCCM */
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Window leader_window;
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GdkWindow *leader_gdk_window;
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gboolean leader_window_title_set;
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/* List of functions to go from extension event => X window */
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GSList *event_types;
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/* X ID hashtable */
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GHashTable *xid_ht;
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/* translation queue */
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GQueue *translate_queue;
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/* Input device */
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/* input GdkDevice list */
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GList *input_devices;
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/* input GdkWindow list */
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GList *input_windows;
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/* Startup notification */
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gchar *startup_notification_id;
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/* Time of most recent user interaction. */
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gulong user_time;
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/* Sets of atoms for DND */
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guint base_dnd_atoms_precached : 1;
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guint xdnd_atoms_precached : 1;
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guint motif_atoms_precached : 1;
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guint use_sync : 1;
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guint have_shapes : 1;
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guint have_input_shapes : 1;
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gint shape_event_base;
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/* The offscreen window that has the pointer in it (if any) */
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GdkWindow *active_offscreen_window;
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GSList *error_traps;
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gint wm_moveresize_button;
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/* GLX information */
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gint glx_version;
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gint glx_error_base;
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gint glx_event_base;
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guint have_glx : 1;
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/* GLX extensions we check */
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guint has_glx_swap_interval : 1;
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guint has_glx_create_context : 1;
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guint has_glx_texture_from_pixmap : 1;
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guint has_glx_video_sync : 1;
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guint has_glx_buffer_age : 1;
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guint has_glx_sync_control : 1;
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};
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struct _GdkX11DisplayClass
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{
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GdkDisplayClass parent_class;
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};
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GdkScreen *_gdk_x11_display_screen_for_xrootwin (GdkDisplay *display,
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Window xrootwin);
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void _gdk_x11_display_error_event (GdkDisplay *display,
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XErrorEvent *error);
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GdkFilterReturn _gdk_wm_protocols_filter (GdkXEvent *xev,
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GdkEvent *event,
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gpointer data);
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G_END_DECLS
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#endif /* __GDK_X11_DISPLAY__ */
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