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.esurface) {
 152         gd_egl_init(vc);
 153         if (!vc->gfx.esurface) {
 154             return;
 155         }
 156         vc->gfx.gls = qemu_gl_init_shader();
 157         if (vc->gfx.ds) {
 158             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 159             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 160         }
 161 #ifdef CONFIG_GBM
 162         if (vc->gfx.guest_fb.dmabuf) {
 163             egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
 164             gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
 165         }
 166 #endif
 167     }
 168
 169     graphic_hw_update(dcl->con);
 170
 171     if (vc->gfx.glupdates) {
 172         vc->gfx.glupdates = 0;
 173         gtk_egl_set_scanout_mode(vc, false);
 174         gd_egl_draw(vc);
 175     }
 176 }
 177
 178 void gd_egl_switch(DisplayChangeListener *dcl,
 179                    DisplaySurface *surface)
 180 {
 181     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 182     bool resized = true;
 183
 184     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 185
 186     if (vc->gfx.ds &&
 187         surface_width(vc->gfx.ds) == surface_width(surface) &&
 188         surface_height(vc->gfx.ds) == surface_height(surface)) {
 189         resized = false;
 190     }
 191     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 192                    vc->gfx.esurface, vc->gfx.ectx);
 193
 194     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 195     vc->gfx.ds = surface;
 196     if (vc->gfx.gls) {
 197         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 198     }
 199
 200     if (resized) {
 201         gd_update_windowsize(vc);
 202     }
 203
 204     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
 205                    EGL_NO_CONTEXT);
 206 }
 207
 208 QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
 209                                     QEMUGLParams *params)
 210 {
 211     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 212
 213     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 214                    vc->gfx.esurface, vc->gfx.ectx);
 215     return qemu_egl_create_context(dgc, params);
 216 }
 217
 218 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
 219 {
 220     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 221
 222     vc->gfx.w = 0;
 223     vc->gfx.h = 0;
 224     gtk_egl_set_scanout_mode(vc, false);
 225 }
 226
 227 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
 228                             uint32_t backing_id, bool backing_y_0_top,
 229                             uint32_t backing_width, uint32_t backing_height,
 230                             uint32_t x, uint32_t y,
 231                             uint32_t w, uint32_t h,
 232                             void *d3d_tex2d)
 233 {
 234     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 235
 236     vc->gfx.x = x;
 237     vc->gfx.y = y;
 238     vc->gfx.w = w;
 239     vc->gfx.h = h;
 240     vc->gfx.y0_top = backing_y_0_top;
 241
 242     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 243                    vc->gfx.esurface, vc->gfx.ectx);
 244
 245     gtk_egl_set_scanout_mode(vc, true);
 246     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 247                          backing_id, false);
 248 }
 249
 250 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
 251                            QemuDmaBuf *dmabuf)
 252 {
 253 #ifdef CONFIG_GBM
 254     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 255
 256     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 257                    vc->gfx.esurface, vc->gfx.ectx);
 258
 259     egl_dmabuf_import_texture(dmabuf);
 260     if (!dmabuf->texture) {
 261         return;
 262     }
 263
 264     gd_egl_scanout_texture(dcl, dmabuf->texture,
 265                            dmabuf->y0_top, dmabuf->width, dmabuf->height,
 266                            dmabuf->x, dmabuf->y, dmabuf->scanout_width,
 267                            dmabuf->scanout_height, NULL);
 268
 269     if (dmabuf->allow_fences) {
 270         vc->gfx.guest_fb.dmabuf = dmabuf;
 271     }
 272 #endif
 273 }
 274
 275 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
 276                           QemuDmaBuf *dmabuf, bool have_hot,
 277                           uint32_t hot_x, uint32_t hot_y)
 278 {
 279 #ifdef CONFIG_GBM
 280     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 281
 282     if (dmabuf) {
 283         egl_dmabuf_import_texture(dmabuf);
 284         if (!dmabuf->texture) {
 285             return;
 286         }
 287         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
 288                              dmabuf->texture, false);
 289     } else {
 290         egl_fb_destroy(&vc->gfx.cursor_fb);
 291     }
 292 #endif
 293 }
 294
 295 void gd_egl_cursor_position(DisplayChangeListener *dcl,
 296                             uint32_t pos_x, uint32_t pos_y)
 297 {
 298     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 299
 300     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
 301     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
 302 }
 303
 304 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
 305                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 306 {
 307     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 308     GdkWindow *window;
 309     int ww, wh;
 310
 311     if (!vc->gfx.scanout_mode) {
 312         return;
 313     }
 314     if (!vc->gfx.guest_fb.framebuffer) {
 315         return;
 316     }
 317
 318     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 319                    vc->gfx.esurface, vc->gfx.ectx);
 320
 321     window = gtk_widget_get_window(vc->gfx.drawing_area);
 322     ww = gdk_window_get_width(window);
 323     wh = gdk_window_get_height(window);
 324     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
 325     if (vc->gfx.cursor_fb.texture) {
 326         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
 327                          vc->gfx.y0_top);
 328         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
 329                           vc->gfx.y0_top,
 330                           vc->gfx.cursor_x, vc->gfx.cursor_y,
 331                           vc->gfx.scale_x, vc->gfx.scale_y);
 332     } else {
 333         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
 334     }
 335
 336 #ifdef CONFIG_GBM
 337     if (vc->gfx.guest_fb.dmabuf) {
 338         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
 339     }
 340 #endif
 341
 342     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 343 }
 344
 345 void gd_egl_flush(DisplayChangeListener *dcl,
 346                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 347 {
 348     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 349     GtkWidget *area = vc->gfx.drawing_area;
 350
 351     if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) {
 352         graphic_hw_gl_block(vc->gfx.dcl.con, true);
 353         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
 354         gtk_widget_queue_draw_area(area, x, y, w, h);
 355         return;
 356     }
 357
 358     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
 359 }
 360
 361 void gtk_egl_init(DisplayGLMode mode)
 362 {
 363     GdkDisplay *gdk_display = gdk_display_get_default();
 364     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 365
 366     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
 367         return;
 368     }
 369
 370     display_opengl = 1;
 371 }
 372
 373 int gd_egl_make_current(DisplayGLCtx *dgc,
 374                         QEMUGLContext ctx)
 375 {
 376     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 377
 378     if (!eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 379                         vc->gfx.esurface, ctx)) {
 380         error_report("egl: eglMakeCurrent failed: %s", qemu_egl_get_error_string());
 381         return -1;
 382     }
 383
 384     return 0;
 385 }