LXR qemu/ui/gtk-egl.c

   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
  26void 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
  48void 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
  68void 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
  83void 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
 106void 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
 131void 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