1 /* 2 * GTK UI -- egl opengl code. 3 * 4 * Note that gtk 3.16+ (released 2015-03-23) has a GtkGLArea widget, 5 * which is GtkDrawingArea like widget with opengl rendering support. 6 * 7 * This code handles opengl support on older gtk versions, using egl 8 * to get a opengl context for the X11 window. 9 * 10 * This work is licensed under the terms of the GNU GPL, version 2 or later. 11 * See the COPYING file in the top-level directory. 12 */ 13 14 #include "qemu-common.h" 15 16 #include "trace.h" 17 18 #include "ui/console.h" 19 #include "ui/gtk.h" 20 #include "ui/egl-helpers.h" 21 22 #include "sysemu/sysemu.h" 23 24 /** DisplayState Callbacks (opengl version) **/ 25 26 void gd_egl_init(VirtualConsole *vc) 27 { 28 GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area); 29 if (!gdk_window) { 30 return; 31 } 32 33 #if GTK_CHECK_VERSION(3, 0, 0) 34 Window x11_window = gdk_x11_window_get_xid(gdk_window); 35 #else 36 Window x11_window = gdk_x11_drawable_get_xid(gdk_window); 37 #endif 38 if (!x11_window) { 39 return; 40 } 41 42 vc->gfx.ectx = qemu_egl_init_ctx(); 43 vc->gfx.esurface = qemu_egl_init_surface_x11(vc->gfx.ectx, x11_window); 44 45 assert(vc->gfx.esurface); 46 } 47 48 void gd_egl_draw(VirtualConsole *vc) 49 { 50 GdkWindow *window; 51 int ww, wh; 52 53 if (!vc->gfx.gls || !vc->gfx.ds) { 54 return; 55 } 56 57 eglMakeCurrent(qemu_egl_display, vc->gfx.esurface, 58 vc->gfx.esurface, vc->gfx.ectx); 59 60 window = gtk_widget_get_window(vc->gfx.drawing_area); 61 gdk_drawable_get_size(window, &ww, &wh); 62 surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh); 63 surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds); 64 65 eglSwapBuffers(qemu_egl_display, vc->gfx.esurface); 66 } 67 68 void gd_egl_update(DisplayChangeListener *dcl, 69 int x, int y, int w, int h) 70 { 71 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); 72 73 if (!vc->gfx.gls || !vc->gfx.ds) { 74 return; 75 } 76 77 eglMakeCurrent(qemu_egl_display, vc->gfx.esurface, 78 vc->gfx.esurface, vc->gfx.ectx); 79 surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h); 80 vc->gfx.glupdates++; 81 } 82 83 void gd_egl_refresh(DisplayChangeListener *dcl) 84 { 85 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); 86 87 if (!vc->gfx.esurface) { 88 gd_egl_init(vc); 89 if (!vc->gfx.esurface) { 90 return; 91 } 92 vc->gfx.gls = console_gl_init_context(); 93 if (vc->gfx.ds) { 94 surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds); 95 } 96 } 97 98 graphic_hw_update(dcl->con); 99 100 if (vc->gfx.glupdates) { 101 vc->gfx.glupdates = 0; 102 gd_egl_draw(vc); 103 } 104 } 105 106 void gd_egl_switch(DisplayChangeListener *dcl, 107 DisplaySurface *surface) 108 { 109 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); 110 bool resized = true; 111 112 trace_gd_switch(vc->label, surface_width(surface), surface_height(surface)); 113 114 if (vc->gfx.ds && 115 surface_width(vc->gfx.ds) == surface_width(surface) && 116 surface_height(vc->gfx.ds) == surface_height(surface)) { 117 resized = false; 118 } 119 120 surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds); 121 vc->gfx.ds = surface; 122 if (vc->gfx.gls) { 123 surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds); 124 } 125 126 if (resized) { 127 gd_update_windowsize(vc); 128 } 129 } 130 131 void gtk_egl_init(void) 132 { 133 GdkDisplay *gdk_display = gdk_display_get_default(); 134 Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display); 135 136 if (qemu_egl_init_dpy(x11_display, false, false) < 0) { 137 return; 138 } 139 140 display_opengl = 1; 141 } 142