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/main-loop.h"
  16
  17 #include "trace.h"
  18
  19 #include "ui/console.h"
  20 #include "ui/gtk.h"
  21 #include "ui/egl-helpers.h"
  22 #include "ui/shader.h"
  23
  24 #include "sysemu/sysemu.h"
  25
  26 static void gtk_egl_set_scanout_mode(VirtualConsole *vc, bool scanout)
  27 {
  28     if (vc->gfx.scanout_mode == scanout) {
  29         return;
  30     }
  31
  32     vc->gfx.scanout_mode = scanout;
  33     if (!vc->gfx.scanout_mode) {
  34         egl_fb_destroy(&vc->gfx.guest_fb);
  35         if (vc->gfx.surface) {
  36             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
  37             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
  38         }
  39     }
  40 }
  41
  42 /** DisplayState Callbacks (opengl version) **/
  43
  44 void gd_egl_init(VirtualConsole *vc)
  45 {
  46     GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
  47     if (!gdk_window) {
  48         return;
  49     }
  50
  51     Window x11_window = gdk_x11_window_get_xid(gdk_window);
  52     if (!x11_window) {
  53         return;
  54     }
  55
  56     vc->gfx.ectx = qemu_egl_init_ctx();
  57     vc->gfx.esurface = qemu_egl_init_surface_x11
  58         (vc->gfx.ectx, (EGLNativeWindowType)x11_window);
  59
  60     assert(vc->gfx.esurface);
  61 }
  62
  63 void gd_egl_draw(VirtualConsole *vc)
  64 {
  65     GdkWindow *window;
  66 #ifdef CONFIG_GBM
  67     QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
  68 #endif
  69     int ww, wh;
  70
  71     if (!vc->gfx.gls) {
  72         return;
  73     }
  74
  75     window = gtk_widget_get_window(vc->gfx.drawing_area);
  76     ww = gdk_window_get_width(window);
  77     wh = gdk_window_get_height(window);
  78
  79     if (vc->gfx.scanout_mode) {
  80 #ifdef CONFIG_GBM
  81         if (dmabuf) {
  82             if (!dmabuf->draw_submitted) {
  83                 return;
  84             } else {
  85                 dmabuf->draw_submitted = false;
  86             }
  87         }
  88 #endif
  89         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
  90
  91         vc->gfx.scale_x = (double)ww / vc->gfx.w;
  92         vc->gfx.scale_y = (double)wh / vc->gfx.h;
  93
  94         glFlush();
  95 #ifdef CONFIG_GBM
  96         if (dmabuf) {
  97             egl_dmabuf_create_fence(dmabuf);
  98             if (dmabuf->fence_fd > 0) {
  99                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
 100                 return;
 101             }
 102             graphic_hw_gl_block(vc->gfx.dcl.con, false);
 103         }
 104 #endif
 105     } else {
 106         if (!vc->gfx.ds) {
 107             return;
 108         }
 109         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 110                        vc->gfx.esurface, vc->gfx.ectx);
 111
 112         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
 113         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
 114
 115         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 116
 117         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
 118         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
 119
 120         glFlush();
 121     }
 122 }
 123
 124 void gd_egl_update(DisplayChangeListener *dcl,
 125                    int x, int y, int w, int h)
 126 {
 127     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 128
 129     if (!vc->gfx.gls || !vc->gfx.ds) {
 130         return;
 131     }
 132
 133     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 134                    vc->gfx.esurface, vc->gfx.ectx);
 135     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 136     vc->gfx.glupdates++;
 137 }
 138
 139 void gd_egl_refresh(DisplayChangeListener *dcl)
 140 {
 141     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 142
 143     gd_update_monitor_refresh_rate(
 144             vc, vc->window ? vc->window : vc->gfx.drawing_area);
 145
 146     if (!vc->gfx.esurface) {
 147         gd_egl_init(vc);
 148         if (!vc->gfx.esurface) {
 149             return;
 150         }
 151         vc->gfx.gls = qemu_gl_init_shader();
 152         if (vc->gfx.ds) {
 153             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 154             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 155         }
 156 #ifdef CONFIG_GBM
 157         if (vc->gfx.guest_fb.dmabuf) {
 158             egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
 159             gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
 160         }
 161 #endif
 162     }
 163
 164     graphic_hw_update(dcl->con);
 165
 166     if (vc->gfx.glupdates) {
 167         vc->gfx.glupdates = 0;
 168         gtk_egl_set_scanout_mode(vc, false);
 169         gd_egl_draw(vc);
 170     }
 171 }
 172
 173 void gd_egl_switch(DisplayChangeListener *dcl,
 174                    DisplaySurface *surface)
 175 {
 176     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 177     bool resized = true;
 178
 179     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 180
 181     if (vc->gfx.ds &&
 182         surface_width(vc->gfx.ds) == surface_width(surface) &&
 183         surface_height(vc->gfx.ds) == surface_height(surface)) {
 184         resized = false;
 185     }
 186     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 187                    vc->gfx.esurface, vc->gfx.ectx);
 188
 189     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 190     vc->gfx.ds = surface;
 191     if (vc->gfx.gls) {
 192         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 193     }
 194
 195     if (resized) {
 196         gd_update_windowsize(vc);
 197     }
 198
 199     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
 200                    EGL_NO_CONTEXT);
 201 }
 202
 203 QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
 204                                     QEMUGLParams *params)
 205 {
 206     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 207
 208     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 209                    vc->gfx.esurface, vc->gfx.ectx);
 210     return qemu_egl_create_context(dgc, params);
 211 }
 212
 213 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
 214 {
 215     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 216
 217     vc->gfx.w = 0;
 218     vc->gfx.h = 0;
 219     gtk_egl_set_scanout_mode(vc, false);
 220 }
 221
 222 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
 223                             uint32_t backing_id, bool backing_y_0_top,
 224                             uint32_t backing_width, uint32_t backing_height,
 225                             uint32_t x, uint32_t y,
 226                             uint32_t w, uint32_t h)
 227 {
 228     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 229
 230     vc->gfx.x = x;
 231     vc->gfx.y = y;
 232     vc->gfx.w = w;
 233     vc->gfx.h = h;
 234     vc->gfx.y0_top = backing_y_0_top;
 235
 236     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 237                    vc->gfx.esurface, vc->gfx.ectx);
 238
 239     gtk_egl_set_scanout_mode(vc, true);
 240     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 241                          backing_id, false);
 242 }
 243
 244 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
 245                            QemuDmaBuf *dmabuf)
 246 {
 247 #ifdef CONFIG_GBM
 248     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 249
 250     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 251                    vc->gfx.esurface, vc->gfx.ectx);
 252
 253     egl_dmabuf_import_texture(dmabuf);
 254     if (!dmabuf->texture) {
 255         return;
 256     }
 257
 258     gd_egl_scanout_texture(dcl, dmabuf->texture,
 259                            false, dmabuf->width, dmabuf->height,
 260                            0, 0, dmabuf->width, dmabuf->height);
 261
 262     if (dmabuf->allow_fences) {
 263         vc->gfx.guest_fb.dmabuf = dmabuf;
 264     }
 265 #endif
 266 }
 267
 268 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
 269                           QemuDmaBuf *dmabuf, bool have_hot,
 270                           uint32_t hot_x, uint32_t hot_y)
 271 {
 272 #ifdef CONFIG_GBM
 273     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 274
 275     if (dmabuf) {
 276         egl_dmabuf_import_texture(dmabuf);
 277         if (!dmabuf->texture) {
 278             return;
 279         }
 280         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
 281                              dmabuf->texture, false);
 282     } else {
 283         egl_fb_destroy(&vc->gfx.cursor_fb);
 284     }
 285 #endif
 286 }
 287
 288 void gd_egl_cursor_position(DisplayChangeListener *dcl,
 289                             uint32_t pos_x, uint32_t pos_y)
 290 {
 291     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 292
 293     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
 294     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
 295 }
 296
 297 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
 298                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 299 {
 300     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 301     GdkWindow *window;
 302     int ww, wh;
 303
 304     if (!vc->gfx.scanout_mode) {
 305         return;
 306     }
 307     if (!vc->gfx.guest_fb.framebuffer) {
 308         return;
 309     }
 310
 311     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 312                    vc->gfx.esurface, vc->gfx.ectx);
 313
 314     window = gtk_widget_get_window(vc->gfx.drawing_area);
 315     ww = gdk_window_get_width(window);
 316     wh = gdk_window_get_height(window);
 317     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
 318     if (vc->gfx.cursor_fb.texture) {
 319         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
 320                          vc->gfx.y0_top);
 321         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
 322                           vc->gfx.y0_top,
 323                           vc->gfx.cursor_x, vc->gfx.cursor_y,
 324                           vc->gfx.scale_x, vc->gfx.scale_y);
 325     } else {
 326         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
 327     }
 328
 329 #ifdef CONFIG_GBM
 330     if (vc->gfx.guest_fb.dmabuf) {
 331         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
 332     }
 333 #endif
 334
 335     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 336 }
 337
 338 void gd_egl_flush(DisplayChangeListener *dcl,
 339                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 340 {
 341     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 342     GtkWidget *area = vc->gfx.drawing_area;
 343
 344     if (vc->gfx.guest_fb.dmabuf) {
 345         graphic_hw_gl_block(vc->gfx.dcl.con, true);
 346         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
 347         gtk_widget_queue_draw_area(area, x, y, w, h);
 348         return;
 349     }
 350
 351     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
 352 }
 353
 354 void gtk_egl_init(DisplayGLMode mode)
 355 {
 356     GdkDisplay *gdk_display = gdk_display_get_default();
 357     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 358
 359     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
 360         return;
 361     }
 362
 363     display_opengl = 1;
 364 }
 365
 366 int gd_egl_make_current(DisplayGLCtx *dgc,
 367                         QEMUGLContext ctx)
 368 {
 369     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 370
 371     return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 372                           vc->gfx.esurface, ctx);
 373 }