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, ws;
  73
  74     if (!vc->gfx.gls) {
  75         return;
  76     }
  77
  78     window = gtk_widget_get_window(vc->gfx.drawing_area);
  79     ws = gdk_window_get_scale_factor(window);
  80     ww = gdk_window_get_width(window) * ws;
  81     wh = gdk_window_get_height(window) * ws;
  82
  83     if (vc->gfx.scanout_mode) {
  84 #ifdef CONFIG_GBM
  85         if (dmabuf) {
  86             if (!dmabuf->draw_submitted) {
  87                 return;
  88             } else {
  89                 dmabuf->draw_submitted = false;
  90             }
  91         }
  92 #endif
  93         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
  94
  95         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
  96         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
  97
  98         glFlush();
  99 #ifdef CONFIG_GBM
 100         if (dmabuf) {
 101             egl_dmabuf_create_fence(dmabuf);
 102             if (dmabuf->fence_fd > 0) {
 103                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
 104                 return;
 105             }
 106             graphic_hw_gl_block(vc->gfx.dcl.con, false);
 107         }
 108 #endif
 109     } else {
 110         if (!vc->gfx.ds) {
 111             return;
 112         }
 113         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 114                        vc->gfx.esurface, vc->gfx.ectx);
 115
 116         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
 117         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
 118
 119         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 120
 121         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
 122         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
 123
 124         glFlush();
 125     }
 126 }
 127
 128 void gd_egl_update(DisplayChangeListener *dcl,
 129                    int x, int y, int w, int h)
 130 {
 131     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 132
 133     if (!vc->gfx.gls || !vc->gfx.ds) {
 134         return;
 135     }
 136
 137     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 138                    vc->gfx.esurface, vc->gfx.ectx);
 139     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 140     vc->gfx.glupdates++;
 141     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE,
 142                    EGL_NO_SURFACE, EGL_NO_CONTEXT);
 143 }
 144
 145 void gd_egl_refresh(DisplayChangeListener *dcl)
 146 {
 147     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 148
 149     gd_update_monitor_refresh_rate(
 150             vc, vc->window ? vc->window : vc->gfx.drawing_area);
 151
 152     if (vc->gfx.guest_fb.dmabuf && vc->gfx.guest_fb.dmabuf->draw_submitted) {
 153         return;
 154     }
 155
 156     if (!vc->gfx.esurface) {
 157         gd_egl_init(vc);
 158         if (!vc->gfx.esurface) {
 159             return;
 160         }
 161         vc->gfx.gls = qemu_gl_init_shader();
 162         if (vc->gfx.ds) {
 163             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 164             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 165         }
 166 #ifdef CONFIG_GBM
 167         if (vc->gfx.guest_fb.dmabuf) {
 168             egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
 169             gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
 170         }
 171 #endif
 172     }
 173
 174     graphic_hw_update(dcl->con);
 175
 176     if (vc->gfx.glupdates) {
 177         vc->gfx.glupdates = 0;
 178         gtk_egl_set_scanout_mode(vc, false);
 179         gd_egl_draw(vc);
 180     }
 181 }
 182
 183 void gd_egl_switch(DisplayChangeListener *dcl,
 184                    DisplaySurface *surface)
 185 {
 186     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 187     bool resized = true;
 188
 189     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 190
 191     if (vc->gfx.ds &&
 192         surface_width(vc->gfx.ds) == surface_width(surface) &&
 193         surface_height(vc->gfx.ds) == surface_height(surface)) {
 194         resized = false;
 195     }
 196     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 197                    vc->gfx.esurface, vc->gfx.ectx);
 198
 199     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 200     vc->gfx.ds = surface;
 201     if (vc->gfx.gls) {
 202         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 203     }
 204
 205     if (resized) {
 206         gd_update_windowsize(vc);
 207     }
 208
 209     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
 210                    EGL_NO_CONTEXT);
 211 }
 212
 213 QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
 214                                     QEMUGLParams *params)
 215 {
 216     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 217
 218     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 219                    vc->gfx.esurface, vc->gfx.ectx);
 220     return qemu_egl_create_context(dgc, params);
 221 }
 222
 223 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
 224 {
 225     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 226
 227     vc->gfx.w = 0;
 228     vc->gfx.h = 0;
 229     gtk_egl_set_scanout_mode(vc, false);
 230 }
 231
 232 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
 233                             uint32_t backing_id, bool backing_y_0_top,
 234                             uint32_t backing_width, uint32_t backing_height,
 235                             uint32_t x, uint32_t y,
 236                             uint32_t w, uint32_t h,
 237                             void *d3d_tex2d)
 238 {
 239     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 240
 241     vc->gfx.x = x;
 242     vc->gfx.y = y;
 243     vc->gfx.w = w;
 244     vc->gfx.h = h;
 245     vc->gfx.y0_top = backing_y_0_top;
 246
 247     if (!vc->gfx.esurface) {
 248         gd_egl_init(vc);
 249         if (!vc->gfx.esurface) {
 250             return;
 251         }
 252     }
 253
 254     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 255                    vc->gfx.esurface, vc->gfx.ectx);
 256
 257     gtk_egl_set_scanout_mode(vc, true);
 258     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 259                          backing_id, false);
 260 }
 261
 262 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
 263                            QemuDmaBuf *dmabuf)
 264 {
 265 #ifdef CONFIG_GBM
 266     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 267
 268     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 269                    vc->gfx.esurface, vc->gfx.ectx);
 270
 271     egl_dmabuf_import_texture(dmabuf);
 272     if (!dmabuf->texture) {
 273         return;
 274     }
 275
 276     gd_egl_scanout_texture(dcl, dmabuf->texture,
 277                            dmabuf->y0_top,
 278                            dmabuf->backing_width, dmabuf->backing_height,
 279                            dmabuf->x, dmabuf->y, dmabuf->width,
 280                            dmabuf->height, NULL);
 281
 282     if (dmabuf->allow_fences) {
 283         vc->gfx.guest_fb.dmabuf = dmabuf;
 284     }
 285 #endif
 286 }
 287
 288 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
 289                           QemuDmaBuf *dmabuf, bool have_hot,
 290                           uint32_t hot_x, uint32_t hot_y)
 291 {
 292 #ifdef CONFIG_GBM
 293     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 294
 295     if (dmabuf) {
 296         egl_dmabuf_import_texture(dmabuf);
 297         if (!dmabuf->texture) {
 298             return;
 299         }
 300         egl_fb_setup_for_tex(&vc->gfx.cursor_fb,
 301                              dmabuf->backing_width, dmabuf->backing_height,
 302                              dmabuf->texture, false);
 303     } else {
 304         egl_fb_destroy(&vc->gfx.cursor_fb);
 305     }
 306 #endif
 307 }
 308
 309 void gd_egl_cursor_position(DisplayChangeListener *dcl,
 310                             uint32_t pos_x, uint32_t pos_y)
 311 {
 312     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 313
 314     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
 315     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
 316 }
 317
 318 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
 319                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 320 {
 321     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 322     GdkWindow *window;
 323     int ww, wh, ws;
 324
 325     if (!vc->gfx.scanout_mode) {
 326         return;
 327     }
 328     if (!vc->gfx.guest_fb.framebuffer) {
 329         return;
 330     }
 331
 332     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 333                    vc->gfx.esurface, vc->gfx.ectx);
 334
 335     window = gtk_widget_get_window(vc->gfx.drawing_area);
 336     ws = gdk_window_get_scale_factor(window);
 337     ww = gdk_window_get_width(window) * ws;
 338     wh = gdk_window_get_height(window) * ws;
 339     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
 340     if (vc->gfx.cursor_fb.texture) {
 341         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
 342                          vc->gfx.y0_top);
 343         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
 344                           vc->gfx.y0_top,
 345                           vc->gfx.cursor_x, vc->gfx.cursor_y,
 346                           vc->gfx.scale_x, vc->gfx.scale_y);
 347     } else {
 348         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
 349     }
 350
 351 #ifdef CONFIG_GBM
 352     if (vc->gfx.guest_fb.dmabuf) {
 353         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
 354     }
 355 #endif
 356
 357     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 358 }
 359
 360 void gd_egl_flush(DisplayChangeListener *dcl,
 361                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 362 {
 363     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 364     GtkWidget *area = vc->gfx.drawing_area;
 365
 366     if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) {
 367         graphic_hw_gl_block(vc->gfx.dcl.con, true);
 368         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
 369         gtk_egl_set_scanout_mode(vc, true);
 370         gtk_widget_queue_draw_area(area, x, y, w, h);
 371         return;
 372     }
 373
 374     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
 375 }
 376
 377 void gtk_egl_init(DisplayGLMode mode)
 378 {
 379     GdkDisplay *gdk_display = gdk_display_get_default();
 380     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 381
 382     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
 383         return;
 384     }
 385
 386     display_opengl = 1;
 387 }
 388
 389 int gd_egl_make_current(DisplayGLCtx *dgc,
 390                         QEMUGLContext ctx)
 391 {
 392     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 393
 394     if (!eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 395                         vc->gfx.esurface, ctx)) {
 396         error_report("egl: eglMakeCurrent failed: %s", qemu_egl_get_error_string());
 397         return -1;
 398     }
 399
 400     return 0;
 401 }