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https://github.com/xemu-project/xemu.git
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97edf3bd5e
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>
142 lines
3.5 KiB
C
142 lines
3.5 KiB
C
/*
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* GTK UI -- egl opengl code.
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*
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* Note that gtk 3.16+ (released 2015-03-23) has a GtkGLArea widget,
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* which is GtkDrawingArea like widget with opengl rendering support.
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*
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* This code handles opengl support on older gtk versions, using egl
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* to get a opengl context for the X11 window.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu-common.h"
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#include "trace.h"
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#include "ui/console.h"
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#include "ui/gtk.h"
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#include "ui/egl-helpers.h"
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#include "sysemu/sysemu.h"
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/** DisplayState Callbacks (opengl version) **/
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void gd_egl_init(VirtualConsole *vc)
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{
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GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
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if (!gdk_window) {
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return;
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}
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#if GTK_CHECK_VERSION(3, 0, 0)
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Window x11_window = gdk_x11_window_get_xid(gdk_window);
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#else
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Window x11_window = gdk_x11_drawable_get_xid(gdk_window);
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#endif
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if (!x11_window) {
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return;
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}
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vc->gfx.ectx = qemu_egl_init_ctx();
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vc->gfx.esurface = qemu_egl_init_surface_x11(vc->gfx.ectx, x11_window);
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assert(vc->gfx.esurface);
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}
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void gd_egl_draw(VirtualConsole *vc)
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{
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GdkWindow *window;
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int ww, wh;
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if (!vc->gfx.gls || !vc->gfx.ds) {
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return;
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}
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eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
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vc->gfx.esurface, vc->gfx.ectx);
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window = gtk_widget_get_window(vc->gfx.drawing_area);
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gdk_drawable_get_size(window, &ww, &wh);
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surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
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surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
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eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
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}
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void gd_egl_update(DisplayChangeListener *dcl,
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int x, int y, int w, int h)
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{
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VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
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if (!vc->gfx.gls || !vc->gfx.ds) {
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return;
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}
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eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
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vc->gfx.esurface, vc->gfx.ectx);
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surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
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vc->gfx.glupdates++;
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}
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void gd_egl_refresh(DisplayChangeListener *dcl)
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{
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VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
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if (!vc->gfx.esurface) {
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gd_egl_init(vc);
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if (!vc->gfx.esurface) {
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return;
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}
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vc->gfx.gls = console_gl_init_context();
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if (vc->gfx.ds) {
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surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
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}
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}
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graphic_hw_update(dcl->con);
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if (vc->gfx.glupdates) {
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vc->gfx.glupdates = 0;
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gd_egl_draw(vc);
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}
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}
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void gd_egl_switch(DisplayChangeListener *dcl,
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DisplaySurface *surface)
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{
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VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
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bool resized = true;
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trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
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if (vc->gfx.ds &&
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surface_width(vc->gfx.ds) == surface_width(surface) &&
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surface_height(vc->gfx.ds) == surface_height(surface)) {
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resized = false;
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}
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surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
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vc->gfx.ds = surface;
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if (vc->gfx.gls) {
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surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
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}
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if (resized) {
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gd_update_windowsize(vc);
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}
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}
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void gtk_egl_init(void)
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{
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GdkDisplay *gdk_display = gdk_display_get_default();
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Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
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if (qemu_egl_init_dpy(x11_display, false, false) < 0) {
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return;
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}
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display_opengl = 1;
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}
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