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/osdep.h"
  15 #include "qemu-common.h"
  16
  17 #include "trace.h"
  18
  19 #include "ui/console.h"
  20 #include "ui/gtk.h"
  21 #include "ui/egl-helpers.h"
  22
  23 #include "sysemu/sysemu.h"
  24
  25 static void gtk_egl_set_scanout_mode(VirtualConsole *vc, bool scanout)
  26 {
  27     if (vc->gfx.scanout_mode == scanout) {
  28         return;
  29     }
  30
  31     vc->gfx.scanout_mode = scanout;
  32     if (!vc->gfx.scanout_mode) {
  33         egl_fb_destroy(&vc->gfx.guest_fb);
  34         if (vc->gfx.surface) {
  35             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
  36             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
  37         }
  38     }
  39 }
  40
  41 /** DisplayState Callbacks (opengl version) **/
  42
  43 void gd_egl_init(VirtualConsole *vc)
  44 {
  45     GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
  46     if (!gdk_window) {
  47         return;
  48     }
  49
  50 #if GTK_CHECK_VERSION(3, 0, 0)
  51     Window x11_window = gdk_x11_window_get_xid(gdk_window);
  52 #else
  53     Window x11_window = gdk_x11_drawable_get_xid(gdk_window);
  54 #endif
  55     if (!x11_window) {
  56         return;
  57     }
  58
  59     vc->gfx.ectx = qemu_egl_init_ctx();
  60     vc->gfx.esurface = qemu_egl_init_surface_x11(vc->gfx.ectx, x11_window);
  61
  62     assert(vc->gfx.esurface);
  63 }
  64
  65 void gd_egl_draw(VirtualConsole *vc)
  66 {
  67     GdkWindow *window;
  68     int ww, wh;
  69
  70     if (!vc->gfx.gls) {
  71         return;
  72     }
  73
  74     if (vc->gfx.scanout_mode) {
  75         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
  76     } else {
  77         if (!vc->gfx.ds) {
  78             return;
  79         }
  80         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
  81                        vc->gfx.esurface, vc->gfx.ectx);
  82
  83         window = gtk_widget_get_window(vc->gfx.drawing_area);
  84         gdk_drawable_get_size(window, &ww, &wh);
  85         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
  86         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
  87
  88         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
  89     }
  90 }
  91
  92 void gd_egl_update(DisplayChangeListener *dcl,
  93                    int x, int y, int w, int h)
  94 {
  95     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
  96
  97     if (!vc->gfx.gls || !vc->gfx.ds) {
  98         return;
  99     }
 100
 101     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 102                    vc->gfx.esurface, vc->gfx.ectx);
 103     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 104     vc->gfx.glupdates++;
 105 }
 106
 107 void gd_egl_refresh(DisplayChangeListener *dcl)
 108 {
 109     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 110
 111     if (!vc->gfx.esurface) {
 112         gd_egl_init(vc);
 113         if (!vc->gfx.esurface) {
 114             return;
 115         }
 116         vc->gfx.gls = qemu_gl_init_shader();
 117         if (vc->gfx.ds) {
 118             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 119         }
 120     }
 121
 122     graphic_hw_update(dcl->con);
 123
 124     if (vc->gfx.glupdates) {
 125         vc->gfx.glupdates = 0;
 126         gtk_egl_set_scanout_mode(vc, false);
 127         gd_egl_draw(vc);
 128     }
 129 }
 130
 131 void gd_egl_switch(DisplayChangeListener *dcl,
 132                    DisplaySurface *surface)
 133 {
 134     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 135     bool resized = true;
 136
 137     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 138
 139     if (vc->gfx.ds &&
 140         surface_width(vc->gfx.ds) == surface_width(surface) &&
 141         surface_height(vc->gfx.ds) == surface_height(surface)) {
 142         resized = false;
 143     }
 144
 145     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 146     vc->gfx.ds = surface;
 147     if (vc->gfx.gls) {
 148         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 149     }
 150
 151     if (resized) {
 152         gd_update_windowsize(vc);
 153     }
 154 }
 155
 156 QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
 157                                     QEMUGLParams *params)
 158 {
 159     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 160
 161     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 162                    vc->gfx.esurface, vc->gfx.ectx);
 163     return qemu_egl_create_context(dcl, params);
 164 }
 165
 166 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
 167 {
 168     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 169
 170     vc->gfx.w = 0;
 171     vc->gfx.h = 0;
 172     gtk_egl_set_scanout_mode(vc, false);
 173 }
 174
 175 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
 176                             uint32_t backing_id, bool backing_y_0_top,
 177                             uint32_t backing_width, uint32_t backing_height,
 178                             uint32_t x, uint32_t y,
 179                             uint32_t w, uint32_t h)
 180 {
 181     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 182
 183     vc->gfx.x = x;
 184     vc->gfx.y = y;
 185     vc->gfx.w = w;
 186     vc->gfx.h = h;
 187     vc->gfx.y0_top = backing_y_0_top;
 188
 189     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 190                    vc->gfx.esurface, vc->gfx.ectx);
 191
 192     gtk_egl_set_scanout_mode(vc, true);
 193     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 194                          backing_id, false);
 195 }
 196
 197 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
 198                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 199 {
 200     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 201     GdkWindow *window;
 202     int ww, wh;
 203
 204     if (!vc->gfx.scanout_mode) {
 205         return;
 206     }
 207     if (!vc->gfx.guest_fb.framebuffer) {
 208         return;
 209     }
 210
 211     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 212                    vc->gfx.esurface, vc->gfx.ectx);
 213
 214     window = gtk_widget_get_window(vc->gfx.drawing_area);
 215     gdk_drawable_get_size(window, &ww, &wh);
 216     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
 217     egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
 218
 219     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 220 }
 221
 222 void gtk_egl_init(void)
 223 {
 224     GdkDisplay *gdk_display = gdk_display_get_default();
 225     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 226
 227     if (qemu_egl_init_dpy_x11(x11_display) < 0) {
 228         return;
 229     }
 230
 231     display_opengl = 1;
 232 }
 233
 234 int gd_egl_make_current(DisplayChangeListener *dcl,
 235                         QEMUGLContext ctx)
 236 {
 237     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 238
 239     return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 240                           vc->gfx.esurface, ctx);
 241 }