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     int fence_fd;
  72 #endif
  73     int ww, wh, ws;
  74
  75     if (!vc->gfx.gls) {
  76         return;
  77     }
  78
  79     window = gtk_widget_get_window(vc->gfx.drawing_area);
  80     ws = gdk_window_get_scale_factor(window);
  81     ww = gdk_window_get_width(window) * ws;
  82     wh = gdk_window_get_height(window) * ws;
  83
  84     if (vc->gfx.scanout_mode) {
  85 #ifdef CONFIG_GBM
  86         if (dmabuf) {
  87             if (!qemu_dmabuf_get_draw_submitted(dmabuf)) {
  88                 return;
  89             } else {
  90                 qemu_dmabuf_set_draw_submitted(dmabuf, false);
  91             }
  92         }
  93 #endif
  94         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
  95
  96         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
  97         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
  98
  99         glFlush();
 100 #ifdef CONFIG_GBM
 101         if (dmabuf) {
 102             egl_dmabuf_create_fence(dmabuf);
 103             fence_fd = qemu_dmabuf_get_fence_fd(dmabuf);
 104             if (fence_fd >= 0) {
 105                 qemu_set_fd_handler(fence_fd, gd_hw_gl_flushed, NULL, vc);
 106                 return;
 107             }
 108             graphic_hw_gl_block(vc->gfx.dcl.con, false);
 109         }
 110 #endif
 111     } else {
 112         if (!vc->gfx.ds) {
 113             return;
 114         }
 115         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 116                        vc->gfx.esurface, vc->gfx.ectx);
 117
 118         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
 119         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
 120
 121         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 122
 123         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
 124         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
 125
 126         glFlush();
 127     }
 128 }
 129
 130 void gd_egl_update(DisplayChangeListener *dcl,
 131                    int x, int y, int w, int h)
 132 {
 133     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 134
 135     if (!vc->gfx.gls || !vc->gfx.ds) {
 136         return;
 137     }
 138
 139     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 140                    vc->gfx.esurface, vc->gfx.ectx);
 141     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 142     vc->gfx.glupdates++;
 143     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE,
 144                    EGL_NO_SURFACE, EGL_NO_CONTEXT);
 145 }
 146
 147 void gd_egl_refresh(DisplayChangeListener *dcl)
 148 {
 149     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 150
 151     gd_update_monitor_refresh_rate(
 152             vc, vc->window ? vc->window : vc->gfx.drawing_area);
 153
 154     if (vc->gfx.guest_fb.dmabuf &&
 155         qemu_dmabuf_get_draw_submitted(vc->gfx.guest_fb.dmabuf)) {
 156         gd_egl_draw(vc);
 157         return;
 158     }
 159
 160     if (!vc->gfx.esurface) {
 161         gd_egl_init(vc);
 162         if (!vc->gfx.esurface) {
 163             return;
 164         }
 165         vc->gfx.gls = qemu_gl_init_shader();
 166         if (vc->gfx.ds) {
 167             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 168             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 169         }
 170 #ifdef CONFIG_GBM
 171         if (vc->gfx.guest_fb.dmabuf) {
 172             egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
 173             gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
 174         }
 175 #endif
 176     }
 177
 178     graphic_hw_update(dcl->con);
 179
 180     if (vc->gfx.glupdates) {
 181         vc->gfx.glupdates = 0;
 182         gtk_egl_set_scanout_mode(vc, false);
 183         gd_egl_draw(vc);
 184     }
 185 }
 186
 187 void gd_egl_switch(DisplayChangeListener *dcl,
 188                    DisplaySurface *surface)
 189 {
 190     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 191     bool resized = true;
 192
 193     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 194
 195     if (vc->gfx.ds &&
 196         surface_width(vc->gfx.ds) == surface_width(surface) &&
 197         surface_height(vc->gfx.ds) == surface_height(surface)) {
 198         resized = false;
 199     }
 200     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 201                    vc->gfx.esurface, vc->gfx.ectx);
 202
 203     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 204     vc->gfx.ds = surface;
 205     if (vc->gfx.gls) {
 206         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 207     }
 208
 209     if (resized) {
 210         gd_update_windowsize(vc);
 211     }
 212
 213     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
 214                    EGL_NO_CONTEXT);
 215 }
 216
 217 QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
 218                                     QEMUGLParams *params)
 219 {
 220     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 221
 222     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 223                    vc->gfx.esurface, vc->gfx.ectx);
 224     return qemu_egl_create_context(dgc, params);
 225 }
 226
 227 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
 228 {
 229     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 230
 231     vc->gfx.w = 0;
 232     vc->gfx.h = 0;
 233     gtk_egl_set_scanout_mode(vc, false);
 234 }
 235
 236 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
 237                             uint32_t backing_id, bool backing_y_0_top,
 238                             uint32_t backing_width, uint32_t backing_height,
 239                             uint32_t x, uint32_t y,
 240                             uint32_t w, uint32_t h,
 241                             void *d3d_tex2d)
 242 {
 243     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 244
 245     vc->gfx.x = x;
 246     vc->gfx.y = y;
 247     vc->gfx.w = w;
 248     vc->gfx.h = h;
 249     vc->gfx.y0_top = backing_y_0_top;
 250
 251     if (!vc->gfx.esurface) {
 252         gd_egl_init(vc);
 253         if (!vc->gfx.esurface) {
 254             return;
 255         }
 256     }
 257
 258     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 259                    vc->gfx.esurface, vc->gfx.ectx);
 260
 261     gtk_egl_set_scanout_mode(vc, true);
 262     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 263                          backing_id, false);
 264 }
 265
 266 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
 267                            QemuDmaBuf *dmabuf)
 268 {
 269 #ifdef CONFIG_GBM
 270     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 271     uint32_t x, y, width, height, backing_width, backing_height, texture;
 272     bool y0_top;
 273
 274     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 275                    vc->gfx.esurface, vc->gfx.ectx);
 276
 277     egl_dmabuf_import_texture(dmabuf);
 278     texture = qemu_dmabuf_get_texture(dmabuf);
 279     if (!texture) {
 280         return;
 281     }
 282
 283     x = qemu_dmabuf_get_x(dmabuf);
 284     y = qemu_dmabuf_get_y(dmabuf);
 285     width = qemu_dmabuf_get_width(dmabuf);
 286     height = qemu_dmabuf_get_height(dmabuf);
 287     backing_width = qemu_dmabuf_get_backing_width(dmabuf);
 288     backing_height = qemu_dmabuf_get_backing_height(dmabuf);
 289     y0_top = qemu_dmabuf_get_y0_top(dmabuf);
 290
 291     gd_egl_scanout_texture(dcl, texture, y0_top, backing_width, backing_height,
 292                            x, y, width, height, NULL);
 293
 294     if (qemu_dmabuf_get_allow_fences(dmabuf)) {
 295         vc->gfx.guest_fb.dmabuf = dmabuf;
 296     }
 297 #endif
 298 }
 299
 300 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
 301                           QemuDmaBuf *dmabuf, bool have_hot,
 302                           uint32_t hot_x, uint32_t hot_y)
 303 {
 304 #ifdef CONFIG_GBM
 305     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 306     uint32_t backing_width, backing_height, texture;
 307
 308     if (dmabuf) {
 309         egl_dmabuf_import_texture(dmabuf);
 310         texture = qemu_dmabuf_get_texture(dmabuf);
 311         if (!texture) {
 312             return;
 313         }
 314
 315         backing_width = qemu_dmabuf_get_backing_width(dmabuf);
 316         backing_height = qemu_dmabuf_get_backing_height(dmabuf);
 317         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, backing_width, backing_height,
 318                              texture, false);
 319     } else {
 320         egl_fb_destroy(&vc->gfx.cursor_fb);
 321     }
 322 #endif
 323 }
 324
 325 void gd_egl_cursor_position(DisplayChangeListener *dcl,
 326                             uint32_t pos_x, uint32_t pos_y)
 327 {
 328     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 329
 330     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
 331     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
 332 }
 333
 334 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
 335                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 336 {
 337     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 338     GdkWindow *window;
 339     int ww, wh, ws;
 340
 341     if (!vc->gfx.scanout_mode) {
 342         return;
 343     }
 344     if (!vc->gfx.guest_fb.framebuffer) {
 345         return;
 346     }
 347
 348     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 349                    vc->gfx.esurface, vc->gfx.ectx);
 350
 351     window = gtk_widget_get_window(vc->gfx.drawing_area);
 352     ws = gdk_window_get_scale_factor(window);
 353     ww = gdk_window_get_width(window) * ws;
 354     wh = gdk_window_get_height(window) * ws;
 355     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
 356     if (vc->gfx.cursor_fb.texture) {
 357         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
 358                          vc->gfx.y0_top);
 359         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
 360                           vc->gfx.y0_top,
 361                           vc->gfx.cursor_x, vc->gfx.cursor_y,
 362                           vc->gfx.scale_x, vc->gfx.scale_y);
 363     } else {
 364         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
 365     }
 366
 367 #ifdef CONFIG_GBM
 368     if (vc->gfx.guest_fb.dmabuf) {
 369         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
 370     }
 371 #endif
 372
 373     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 374 }
 375
 376 void gd_egl_flush(DisplayChangeListener *dcl,
 377                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 378 {
 379     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 380     GtkWidget *area = vc->gfx.drawing_area;
 381
 382     if (vc->gfx.guest_fb.dmabuf &&
 383         !qemu_dmabuf_get_draw_submitted(vc->gfx.guest_fb.dmabuf)) {
 384         graphic_hw_gl_block(vc->gfx.dcl.con, true);
 385         qemu_dmabuf_set_draw_submitted(vc->gfx.guest_fb.dmabuf, true);
 386         gtk_egl_set_scanout_mode(vc, true);
 387         gtk_widget_queue_draw_area(area, x, y, w, h);
 388         return;
 389     }
 390
 391     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
 392 }
 393
 394 void gtk_egl_init(DisplayGLMode mode)
 395 {
 396     GdkDisplay *gdk_display = gdk_display_get_default();
 397     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 398
 399     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
 400         return;
 401     }
 402
 403     display_opengl = 1;
 404 }
 405
 406 int gd_egl_make_current(DisplayGLCtx *dgc,
 407                         QEMUGLContext ctx)
 408 {
 409     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 410
 411     if (!eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 412                         vc->gfx.esurface, ctx)) {
 413         error_report("egl: eglMakeCurrent failed: %s", qemu_egl_get_error_string());
 414         return -1;
 415     }
 416
 417     return 0;
 418 }