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gtk: add opengl support, using egl

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This adds opengl rendering support to the gtk ui, using egl.
It's off by default for now, use 'qemu -display gtk,gl=on'
to play with this.

Note that gtk got native opengl support with release 3.16.
There most likely will be a separate implementation for 3.16+,
using the native gtk opengl support.  This patch covers older
versions (and for the time being 3.16 too, hopefully without
rendering quirks).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2015-01-20 12:43:28 +01:00
parent 7ced9e9f6d
commit 97edf3bd5e
6 changed files with 253 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/ui/console.h
View File

@ -393,7 +393,7 @@ void curses_display_init(DisplayState *ds, int full_screen);
int index_from_key(const char *key);
/* gtk.c */
void early_gtk_display_init(void);
void early_gtk_display_init(int opengl);
void gtk_display_init(DisplayState *ds, bool full_screen, bool grab_on_hover);
#endif

23
include/ui/gtk.h
View File

@ -22,6 +22,10 @@
#include <X11/XKBlib.h>
#endif
#if defined(CONFIG_OPENGL)
#include "ui/egl-helpers.h"
#endif
/* Compatibility define to let us build on both Gtk2 and Gtk3 */
#if GTK_CHECK_VERSION(3, 0, 0)
static inline void gdk_drawable_get_size(GdkWindow *w, gint *ww, gint *wh)
@ -41,6 +45,12 @@ typedef struct VirtualGfxConsole {
cairo_surface_t *surface;
double scale_x;
double scale_y;
#if defined(CONFIG_OPENGL)
ConsoleGLState *gls;
EGLContext ectx;
EGLSurface esurface;
int glupdates;
#endif
} VirtualGfxConsole;
#if defined(CONFIG_VTE)
@ -73,4 +83,17 @@ typedef struct VirtualConsole {
};
} VirtualConsole;
/* ui/gtk.c */
void gd_update_windowsize(VirtualConsole *vc);
/* ui/gtk-egl.c */
void gd_egl_init(VirtualConsole *vc);
void gd_egl_draw(VirtualConsole *vc);
void gd_egl_update(DisplayChangeListener *dcl,
int x, int y, int w, int h);
void gd_egl_refresh(DisplayChangeListener *dcl);
void gd_egl_switch(DisplayChangeListener *dcl,
DisplaySurface *surface);
void gtk_egl_init(void);
#endif /* UI_GTK_H */

3
ui/Makefile.objs
View File

@ -31,13 +31,16 @@ ifeq ($(CONFIG_OPENGL),y)
common-obj-y += shader.o
common-obj-y += console-gl.o
common-obj-y += egl-helpers.o
common-obj-$(CONFIG_GTK) += gtk-egl.o
endif
gtk.o-cflags := $(GTK_CFLAGS) $(VTE_CFLAGS)
gtk-egl.o-cflags := $(GTK_CFLAGS) $(VTE_CFLAGS) $(OPENGL_CFLAGS)
shader.o-cflags += $(OPENGL_CFLAGS)
console-gl.o-cflags += $(OPENGL_CFLAGS)
egl-helpers.o-cflags += $(OPENGL_CFLAGS)
gtk-egl.o-libs += $(OPENGL_LIBS)
shader.o-libs += $(OPENGL_LIBS)
console-gl.o-libs += $(OPENGL_LIBS)
egl-helpers.o-libs += $(OPENGL_LIBS)

141
ui/gtk-egl.c Normal file
View File

@ -0,0 +1,141 @@
/*
* GTK UI -- egl opengl code.
*
* Note that gtk 3.16+ (released 2015-03-23) has a GtkGLArea widget,
* which is GtkDrawingArea like widget with opengl rendering support.
*
* This code handles opengl support on older gtk versions, using egl
* to get a opengl context for the X11 window.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu-common.h"
#include "trace.h"
#include "ui/console.h"
#include "ui/gtk.h"
#include "ui/egl-helpers.h"
#include "sysemu/sysemu.h"
/** DisplayState Callbacks (opengl version) **/
void gd_egl_init(VirtualConsole *vc)
{
GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
if (!gdk_window) {
return;
}
#if GTK_CHECK_VERSION(3, 0, 0)
Window x11_window = gdk_x11_window_get_xid(gdk_window);
#else
Window x11_window = gdk_x11_drawable_get_xid(gdk_window);
#endif
if (!x11_window) {
return;
}
vc->gfx.ectx = qemu_egl_init_ctx();
vc->gfx.esurface = qemu_egl_init_surface_x11(vc->gfx.ectx, x11_window);
assert(vc->gfx.esurface);
}
void gd_egl_draw(VirtualConsole *vc)
{
GdkWindow *window;
int ww, wh;
if (!vc->gfx.gls || !vc->gfx.ds) {
return;
}
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
window = gtk_widget_get_window(vc->gfx.drawing_area);
gdk_drawable_get_size(window, &ww, &wh);
surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
}
void gd_egl_update(DisplayChangeListener *dcl,
int x, int y, int w, int h)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
if (!vc->gfx.gls || !vc->gfx.ds) {
return;
}
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
vc->gfx.glupdates++;
}
void gd_egl_refresh(DisplayChangeListener *dcl)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
if (!vc->gfx.esurface) {
gd_egl_init(vc);
if (!vc->gfx.esurface) {
return;
}
vc->gfx.gls = console_gl_init_context();
if (vc->gfx.ds) {
surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
}
}
graphic_hw_update(dcl->con);
if (vc->gfx.glupdates) {
vc->gfx.glupdates = 0;
gd_egl_draw(vc);
}
}
void gd_egl_switch(DisplayChangeListener *dcl,
DisplaySurface *surface)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
bool resized = true;
trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
if (vc->gfx.ds &&
surface_width(vc->gfx.ds) == surface_width(surface) &&
surface_height(vc->gfx.ds) == surface_height(surface)) {
resized = false;
}
surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
vc->gfx.ds = surface;
if (vc->gfx.gls) {
surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
}
if (resized) {
gd_update_windowsize(vc);
}
}
void gtk_egl_init(void)
{
GdkDisplay *gdk_display = gdk_display_get_default();
Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
if (qemu_egl_init_dpy(x11_display, false, false) < 0) {
return;
}
display_opengl = 1;
}

90
ui/gtk.c
View File

@ -339,7 +339,7 @@ static void gd_update_geometry_hints(VirtualConsole *vc)
gtk_window_set_geometry_hints(geo_window, geo_widget, &geo, mask);
}
static void gd_update_windowsize(VirtualConsole *vc)
void gd_update_windowsize(VirtualConsole *vc)
{
GtkDisplayState *s = vc->s;
@ -581,6 +581,33 @@ static void gd_switch(DisplayChangeListener *dcl,
}
}
static const DisplayChangeListenerOps dcl_ops = {
.dpy_name = "gtk",
.dpy_gfx_update = gd_update,
.dpy_gfx_switch = gd_switch,
.dpy_gfx_check_format = qemu_pixman_check_format,
.dpy_refresh = gd_refresh,
.dpy_mouse_set = gd_mouse_set,
.dpy_cursor_define = gd_cursor_define,
};
#if defined(CONFIG_OPENGL)
/** DisplayState Callbacks (opengl version) **/
static const DisplayChangeListenerOps dcl_egl_ops = {
.dpy_name = "gtk-egl",
.dpy_gfx_update = gd_egl_update,
.dpy_gfx_switch = gd_egl_switch,
.dpy_gfx_check_format = console_gl_check_format,
.dpy_refresh = gd_egl_refresh,
.dpy_mouse_set = gd_mouse_set,
.dpy_cursor_define = gd_cursor_define,
};
#endif
/** QEMU Events **/
static void gd_change_runstate(void *opaque, int running, RunState state)
@ -637,6 +664,13 @@ static gboolean gd_draw_event(GtkWidget *widget, cairo_t *cr, void *opaque)
int ww, wh;
int fbw, fbh;
#if defined(CONFIG_OPENGL)
if (vc->gfx.gls) {
gd_egl_draw(vc);
return TRUE;
}
#endif
if (!gtk_widget_get_realized(widget)) {
return FALSE;
}
@ -1676,16 +1710,6 @@ static GtkWidget *gd_create_menu_machine(GtkDisplayState *s)
return machine_menu;
}
static const DisplayChangeListenerOps dcl_ops = {
.dpy_name = "gtk",
.dpy_gfx_update = gd_update,
.dpy_gfx_switch = gd_switch,
.dpy_gfx_check_format = qemu_pixman_check_format,
.dpy_refresh = gd_refresh,
.dpy_mouse_set = gd_mouse_set,
.dpy_cursor_define = gd_cursor_define,
};
static GSList *gd_vc_gfx_init(GtkDisplayState *s, VirtualConsole *vc,
QemuConsole *con, int idx,
GSList *group, GtkWidget *view_menu)
@ -1713,7 +1737,29 @@ static GSList *gd_vc_gfx_init(GtkDisplayState *s, VirtualConsole *vc,
gtk_notebook_append_page(GTK_NOTEBOOK(s->notebook),
vc->tab_item, gtk_label_new(vc->label));
vc->gfx.dcl.ops = &dcl_ops;
#if defined(CONFIG_OPENGL)
if (display_opengl) {
/*
* gtk_widget_set_double_buffered() was deprecated in 3.14.
* It is required for opengl rendering on X11 though. A
* proper replacement (native opengl support) is only
* available in 3.16+. Silence the warning if possible.
*/
#ifdef CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
gtk_widget_set_double_buffered(vc->gfx.drawing_area, FALSE);
#ifdef CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE
#pragma GCC diagnostic pop
#endif
vc->gfx.dcl.ops = &dcl_egl_ops;
} else
#endif
{
vc->gfx.dcl.ops = &dcl_ops;
}
vc->gfx.dcl.con = con;
register_displaychangelistener(&vc->gfx.dcl);
@ -1876,8 +1922,6 @@ void gtk_display_init(DisplayState *ds, bool full_screen, bool grab_on_hover)
GtkDisplayState *s = g_malloc0(sizeof(*s));
char *filename;
gtk_init(NULL, NULL);
s->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
#if GTK_CHECK_VERSION(3, 2, 0)
s->vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
@ -1954,8 +1998,24 @@ void gtk_display_init(DisplayState *ds, bool full_screen, bool grab_on_hover)
gd_set_keycode_type(s);
}
void early_gtk_display_init(void)
void early_gtk_display_init(int opengl)
{
gtk_init(NULL, NULL);
switch (opengl) {
case -1: /* default */
case 0: /* off */
break;
case 1: /* on */
#if defined(CONFIG_OPENGL)
gtk_egl_init();
#endif
break;
default:
g_assert_not_reached();
break;
}
#if defined(CONFIG_VTE)
register_vc_handler(gd_vc_handler);
#endif

11
vl.c
View File

@ -2047,6 +2047,15 @@ static DisplayType select_display(const char *p)
} else {
goto invalid_gtk_args;
}
} else if (strstart(opts, ",gl=", &nextopt)) {
opts = nextopt;
if (strstart(opts, "on", &nextopt)) {
request_opengl = 1;
} else if (strstart(opts, "off", &nextopt)) {
request_opengl = 0;
} else {
goto invalid_gtk_args;
}
} else {
invalid_gtk_args:
fprintf(stderr, "Invalid GTK option string: %s\n", p);
@ -4012,7 +4021,7 @@ int main(int argc, char **argv, char **envp)
#if defined(CONFIG_GTK)
if (display_type == DT_GTK) {
early_gtk_display_init();
early_gtk_display_init(request_opengl);
}
#endif
#if defined(CONFIG_SDL)