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 #include "qemu/error-report.h"
  17
  18 #include "trace.h"
  19
  20 #include "ui/console.h"
  21 #include "ui/gtk.h"
  22 #include "ui/egl-helpers.h"
  23 #include "ui/shader.h"
  24
  25 #include "sysemu/sysemu.h"
  26
  27 static void gtk_egl_set_scanout_mode(VirtualConsole *vc, bool scanout)
  28 {
  29     if (vc->gfx.scanout_mode == scanout) {
  30         return;
  31     }
  32
  33     vc->gfx.scanout_mode = scanout;
  34     if (!vc->gfx.scanout_mode) {
  35         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
  36                        vc->gfx.esurface, vc->gfx.ectx);
  37         egl_fb_destroy(&vc->gfx.guest_fb);
  38         if (vc->gfx.surface) {
  39             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
  40             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
  41         }
  42     }
  43 }
  44
  45 /** DisplayState Callbacks (opengl version) **/
  46
  47 void gd_egl_init(VirtualConsole *vc)
  48 {
  49     GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
  50     if (!gdk_window) {
  51         return;
  52     }
  53
  54     Window x11_window = gdk_x11_window_get_xid(gdk_window);
  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
  61         (vc->gfx.ectx, (EGLNativeWindowType)x11_window);
  62
  63     assert(vc->gfx.esurface);
  64 }
  65
  66 void gd_egl_draw(VirtualConsole *vc)
  67 {
  68     GdkWindow *window;
  69 #ifdef CONFIG_GBM
  70     QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
  71 #endif
  72     int ww, wh;
  73
  74     if (!vc->gfx.gls) {
  75         return;
  76     }
  77
  78     window = gtk_widget_get_window(vc->gfx.drawing_area);
  79     ww = gdk_window_get_width(window);
  80     wh = gdk_window_get_height(window);
  81
  82     if (vc->gfx.scanout_mode) {
  83 #ifdef CONFIG_GBM
  84         if (dmabuf) {
  85             if (!dmabuf->draw_submitted) {
  86                 return;
  87             } else {
  88                 dmabuf->draw_submitted = false;
  89             }
  90         }
  91 #endif
  92         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
  93
  94         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
  95         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
  96
  97         glFlush();
  98 #ifdef CONFIG_GBM
  99         if (dmabuf) {
 100             egl_dmabuf_create_fence(dmabuf);
 101             if (dmabuf->fence_fd > 0) {
 102                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
 103                 return;
 104             }
 105             graphic_hw_gl_block(vc->gfx.dcl.con, false);
 106         }
 107 #endif
 108     } else {
 109         if (!vc->gfx.ds) {
 110             return;
 111         }
 112         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 113                        vc->gfx.esurface, vc->gfx.ectx);
 114
 115         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
 116         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
 117
 118         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 119
 120         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
 121         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
 122
 123         glFlush();
 124     }
 125 }
 126
 127 void gd_egl_update(DisplayChangeListener *dcl,
 128                    int x, int y, int w, int h)
 129 {
 130     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 131
 132     if (!vc->gfx.gls || !vc->gfx.ds) {
 133         return;
 134     }
 135
 136     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 137                    vc->gfx.esurface, vc->gfx.ectx);
 138     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 139     vc->gfx.glupdates++;
 140     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE,
 141                    EGL_NO_SURFACE, EGL_NO_CONTEXT);
 142 }
 143
 144 void gd_egl_refresh(DisplayChangeListener *dcl)
 145 {
 146     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 147
 148     gd_update_monitor_refresh_rate(
 149             vc, vc->window ? vc->window : vc->gfx.drawing_area);
 150
 151     if (vc->gfx.guest_fb.dmabuf && vc->gfx.guest_fb.dmabuf->draw_submitted) {
 152         return;
 153     }
 154
 155     if (!vc->gfx.esurface) {
 156         gd_egl_init(vc);
 157         if (!vc->gfx.esurface) {
 158             return;
 159         }
 160         vc->gfx.gls = qemu_gl_init_shader();
 161         if (vc->gfx.ds) {
 162             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 163             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 164         }
 165 #ifdef CONFIG_GBM
 166         if (vc->gfx.guest_fb.dmabuf) {
 167             egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
 168             gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
 169         }
 170 #endif
 171     }
 172
 173     graphic_hw_update(dcl->con);
 174
 175     if (vc->gfx.glupdates) {
 176         vc->gfx.glupdates = 0;
 177         gtk_egl_set_scanout_mode(vc, false);
 178         gd_egl_draw(vc);
 179     }
 180 }
 181
 182 void gd_egl_switch(DisplayChangeListener *dcl,
 183                    DisplaySurface *surface)
 184 {
 185     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 186     bool resized = true;
 187
 188     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 189
 190     if (vc->gfx.ds &&
 191         surface_width(vc->gfx.ds) == surface_width(surface) &&
 192         surface_height(vc->gfx.ds) == surface_height(surface)) {
 193         resized = false;
 194     }
 195     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 196                    vc->gfx.esurface, vc->gfx.ectx);
 197
 198     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 199     vc->gfx.ds = surface;
 200     if (vc->gfx.gls) {
 201         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 202     }
 203
 204     if (resized) {
 205         gd_update_windowsize(vc);
 206     }
 207
 208     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
 209                    EGL_NO_CONTEXT);
 210 }
 211
 212 QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
 213                                     QEMUGLParams *params)
 214 {
 215     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 216
 217     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 218                    vc->gfx.esurface, vc->gfx.ectx);
 219     return qemu_egl_create_context(dgc, params);
 220 }
 221
 222 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
 223 {
 224     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 225
 226     vc->gfx.w = 0;
 227     vc->gfx.h = 0;
 228     gtk_egl_set_scanout_mode(vc, false);
 229 }
 230
 231 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
 232                             uint32_t backing_id, bool backing_y_0_top,
 233                             uint32_t backing_width, uint32_t backing_height,
 234                             uint32_t x, uint32_t y,
 235                             uint32_t w, uint32_t h,
 236                             void *d3d_tex2d)
 237 {
 238     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 239
 240     vc->gfx.x = x;
 241     vc->gfx.y = y;
 242     vc->gfx.w = w;
 243     vc->gfx.h = h;
 244     vc->gfx.y0_top = backing_y_0_top;
 245
 246     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 247                    vc->gfx.esurface, vc->gfx.ectx);
 248
 249     gtk_egl_set_scanout_mode(vc, true);
 250     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 251                          backing_id, false);
 252 }
 253
 254 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
 255                            QemuDmaBuf *dmabuf)
 256 {
 257 #ifdef CONFIG_GBM
 258     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 259
 260     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 261                    vc->gfx.esurface, vc->gfx.ectx);
 262
 263     egl_dmabuf_import_texture(dmabuf);
 264     if (!dmabuf->texture) {
 265         return;
 266     }
 267
 268     gd_egl_scanout_texture(dcl, dmabuf->texture,
 269                            dmabuf->y0_top,
 270                            dmabuf->backing_width, dmabuf->backing_height,
 271                            dmabuf->x, dmabuf->y, dmabuf->width,
 272                            dmabuf->height, NULL);
 273
 274     if (dmabuf->allow_fences) {
 275         vc->gfx.guest_fb.dmabuf = dmabuf;
 276     }
 277 #endif
 278 }
 279
 280 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
 281                           QemuDmaBuf *dmabuf, bool have_hot,
 282                           uint32_t hot_x, uint32_t hot_y)
 283 {
 284 #ifdef CONFIG_GBM
 285     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 286
 287     if (dmabuf) {
 288         egl_dmabuf_import_texture(dmabuf);
 289         if (!dmabuf->texture) {
 290             return;
 291         }
 292         egl_fb_setup_for_tex(&vc->gfx.cursor_fb,
 293                              dmabuf->backing_width, dmabuf->backing_height,
 294                              dmabuf->texture, false);
 295     } else {
 296         egl_fb_destroy(&vc->gfx.cursor_fb);
 297     }
 298 #endif
 299 }
 300
 301 void gd_egl_cursor_position(DisplayChangeListener *dcl,
 302                             uint32_t pos_x, uint32_t pos_y)
 303 {
 304     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 305
 306     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
 307     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
 308 }
 309
 310 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
 311                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 312 {
 313     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 314     GdkWindow *window;
 315     int ww, wh;
 316
 317     if (!vc->gfx.scanout_mode) {
 318         return;
 319     }
 320     if (!vc->gfx.guest_fb.framebuffer) {
 321         return;
 322     }
 323
 324     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 325                    vc->gfx.esurface, vc->gfx.ectx);
 326
 327     window = gtk_widget_get_window(vc->gfx.drawing_area);
 328     ww = gdk_window_get_width(window);
 329     wh = gdk_window_get_height(window);
 330     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
 331     if (vc->gfx.cursor_fb.texture) {
 332         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
 333                          vc->gfx.y0_top);
 334         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
 335                           vc->gfx.y0_top,
 336                           vc->gfx.cursor_x, vc->gfx.cursor_y,
 337                           vc->gfx.scale_x, vc->gfx.scale_y);
 338     } else {
 339         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
 340     }
 341
 342 #ifdef CONFIG_GBM
 343     if (vc->gfx.guest_fb.dmabuf) {
 344         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
 345     }
 346 #endif
 347
 348     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 349 }
 350
 351 void gd_egl_flush(DisplayChangeListener *dcl,
 352                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 353 {
 354     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 355     GtkWidget *area = vc->gfx.drawing_area;
 356
 357     if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) {
 358         graphic_hw_gl_block(vc->gfx.dcl.con, true);
 359         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
 360         gtk_egl_set_scanout_mode(vc, true);
 361         gtk_widget_queue_draw_area(area, x, y, w, h);
 362         return;
 363     }
 364
 365     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
 366 }
 367
 368 void gtk_egl_init(DisplayGLMode mode)
 369 {
 370     GdkDisplay *gdk_display = gdk_display_get_default();
 371     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 372
 373     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
 374         return;
 375     }
 376
 377     display_opengl = 1;
 378 }
 379
 380 int gd_egl_make_current(DisplayGLCtx *dgc,
 381                         QEMUGLContext ctx)
 382 {
 383     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 384
 385     if (!eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 386                         vc->gfx.esurface, ctx)) {
 387         error_report("egl: eglMakeCurrent failed: %s", qemu_egl_get_error_string());
 388         return -1;
 389     }
 390
 391     return 0;
 392 }