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     graphic_hw_gl_flushed(vc->gfx.dcl.con);
 124 }
 125
 126 void gd_egl_update(DisplayChangeListener *dcl,
 127                    int x, int y, int w, int h)
 128 {
 129     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 130
 131     if (!vc->gfx.gls || !vc->gfx.ds) {
 132         return;
 133     }
 134
 135     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 136                    vc->gfx.esurface, vc->gfx.ectx);
 137     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 138     vc->gfx.glupdates++;
 139 }
 140
 141 void gd_egl_refresh(DisplayChangeListener *dcl)
 142 {
 143     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 144
 145     vc->gfx.dcl.update_interval = gd_monitor_update_interval(
 146             vc->window ? vc->window : vc->gfx.drawing_area);
 147
 148     if (!vc->gfx.esurface) {
 149         gd_egl_init(vc);
 150         if (!vc->gfx.esurface) {
 151             return;
 152         }
 153         vc->gfx.gls = qemu_gl_init_shader();
 154         if (vc->gfx.ds) {
 155             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 156         }
 157     }
 158
 159     graphic_hw_update(dcl->con);
 160
 161     if (vc->gfx.glupdates) {
 162         vc->gfx.glupdates = 0;
 163         gtk_egl_set_scanout_mode(vc, false);
 164         gd_egl_draw(vc);
 165     }
 166 }
 167
 168 void gd_egl_switch(DisplayChangeListener *dcl,
 169                    DisplaySurface *surface)
 170 {
 171     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 172     bool resized = true;
 173
 174     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 175
 176     if (vc->gfx.ds &&
 177         surface_width(vc->gfx.ds) == surface_width(surface) &&
 178         surface_height(vc->gfx.ds) == surface_height(surface)) {
 179         resized = false;
 180     }
 181
 182     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 183     vc->gfx.ds = surface;
 184     if (vc->gfx.gls) {
 185         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 186     }
 187
 188     if (resized) {
 189         gd_update_windowsize(vc);
 190     }
 191 }
 192
 193 QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
 194                                     QEMUGLParams *params)
 195 {
 196     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 197
 198     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 199                    vc->gfx.esurface, vc->gfx.ectx);
 200     return qemu_egl_create_context(dcl, params);
 201 }
 202
 203 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
 204 {
 205     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 206
 207     vc->gfx.w = 0;
 208     vc->gfx.h = 0;
 209     gtk_egl_set_scanout_mode(vc, false);
 210 }
 211
 212 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
 213                             uint32_t backing_id, bool backing_y_0_top,
 214                             uint32_t backing_width, uint32_t backing_height,
 215                             uint32_t x, uint32_t y,
 216                             uint32_t w, uint32_t h)
 217 {
 218     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 219
 220     vc->gfx.x = x;
 221     vc->gfx.y = y;
 222     vc->gfx.w = w;
 223     vc->gfx.h = h;
 224     vc->gfx.y0_top = backing_y_0_top;
 225
 226     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 227                    vc->gfx.esurface, vc->gfx.ectx);
 228
 229     gtk_egl_set_scanout_mode(vc, true);
 230     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 231                          backing_id, false);
 232 }
 233
 234 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
 235                            QemuDmaBuf *dmabuf)
 236 {
 237 #ifdef CONFIG_GBM
 238     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 239
 240     egl_dmabuf_import_texture(dmabuf);
 241     if (!dmabuf->texture) {
 242         return;
 243     }
 244
 245     gd_egl_scanout_texture(dcl, dmabuf->texture,
 246                            false, dmabuf->width, dmabuf->height,
 247                            0, 0, dmabuf->width, dmabuf->height);
 248
 249     if (dmabuf->allow_fences) {
 250         vc->gfx.guest_fb.dmabuf = dmabuf;
 251     }
 252 #endif
 253 }
 254
 255 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
 256                           QemuDmaBuf *dmabuf, bool have_hot,
 257                           uint32_t hot_x, uint32_t hot_y)
 258 {
 259 #ifdef CONFIG_GBM
 260     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 261
 262     if (dmabuf) {
 263         egl_dmabuf_import_texture(dmabuf);
 264         if (!dmabuf->texture) {
 265             return;
 266         }
 267         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
 268                              dmabuf->texture, false);
 269     } else {
 270         egl_fb_destroy(&vc->gfx.cursor_fb);
 271     }
 272 #endif
 273 }
 274
 275 void gd_egl_cursor_position(DisplayChangeListener *dcl,
 276                             uint32_t pos_x, uint32_t pos_y)
 277 {
 278     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 279
 280     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
 281     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
 282 }
 283
 284 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
 285                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 286 {
 287     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 288     GdkWindow *window;
 289     int ww, wh;
 290
 291     if (!vc->gfx.scanout_mode) {
 292         return;
 293     }
 294     if (!vc->gfx.guest_fb.framebuffer) {
 295         return;
 296     }
 297
 298     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 299                    vc->gfx.esurface, vc->gfx.ectx);
 300
 301     window = gtk_widget_get_window(vc->gfx.drawing_area);
 302     ww = gdk_window_get_width(window);
 303     wh = gdk_window_get_height(window);
 304     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
 305     if (vc->gfx.cursor_fb.texture) {
 306         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
 307                          vc->gfx.y0_top);
 308         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
 309                           vc->gfx.y0_top,
 310                           vc->gfx.cursor_x, vc->gfx.cursor_y,
 311                           vc->gfx.scale_x, vc->gfx.scale_y);
 312     } else {
 313         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
 314     }
 315
 316 #ifdef CONFIG_GBM
 317     if (vc->gfx.guest_fb.dmabuf) {
 318         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
 319     }
 320 #endif
 321
 322     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 323 }
 324
 325 void gd_egl_flush(DisplayChangeListener *dcl,
 326                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 327 {
 328     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 329     GtkWidget *area = vc->gfx.drawing_area;
 330
 331     if (vc->gfx.guest_fb.dmabuf) {
 332         graphic_hw_gl_block(vc->gfx.dcl.con, true);
 333         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
 334         gtk_widget_queue_draw_area(area, x, y, w, h);
 335         return;
 336     }
 337
 338     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
 339 }
 340
 341 void gtk_egl_init(DisplayGLMode mode)
 342 {
 343     GdkDisplay *gdk_display = gdk_display_get_default();
 344     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 345
 346     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
 347         return;
 348     }
 349
 350     display_opengl = 1;
 351 }
 352
 353 int gd_egl_make_current(DisplayChangeListener *dcl,
 354                         QEMUGLContext ctx)
 355 {
 356     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 357
 358     return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 359                           vc->gfx.esurface, ctx);
 360 }