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         egl_fb_destroy(&vc->gfx.guest_fb);
  36         if (vc->gfx.surface) {
  37             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
  38             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
  39         }
  40     }
  41 }
  42
  43 /** DisplayState Callbacks (opengl version) **/
  44
  45 void gd_egl_init(VirtualConsole *vc)
  46 {
  47     GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
  48     if (!gdk_window) {
  49         return;
  50     }
  51
  52     Window x11_window = gdk_x11_window_get_xid(gdk_window);
  53     if (!x11_window) {
  54         return;
  55     }
  56
  57     vc->gfx.ectx = qemu_egl_init_ctx();
  58     vc->gfx.esurface = qemu_egl_init_surface_x11
  59         (vc->gfx.ectx, (EGLNativeWindowType)x11_window);
  60
  61     assert(vc->gfx.esurface);
  62 }
  63
  64 void gd_egl_draw(VirtualConsole *vc)
  65 {
  66     GdkWindow *window;
  67 #ifdef CONFIG_GBM
  68     QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
  69 #endif
  70     int ww, wh;
  71
  72     if (!vc->gfx.gls) {
  73         return;
  74     }
  75
  76     window = gtk_widget_get_window(vc->gfx.drawing_area);
  77     ww = gdk_window_get_width(window);
  78     wh = gdk_window_get_height(window);
  79
  80     if (vc->gfx.scanout_mode) {
  81 #ifdef CONFIG_GBM
  82         if (dmabuf) {
  83             if (!dmabuf->draw_submitted) {
  84                 return;
  85             } else {
  86                 dmabuf->draw_submitted = false;
  87             }
  88         }
  89 #endif
  90         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
  91
  92         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
  93         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
  94
  95         glFlush();
  96 #ifdef CONFIG_GBM
  97         if (dmabuf) {
  98             egl_dmabuf_create_fence(dmabuf);
  99             if (dmabuf->fence_fd > 0) {
 100                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
 101                 return;
 102             }
 103             graphic_hw_gl_block(vc->gfx.dcl.con, false);
 104         }
 105 #endif
 106     } else {
 107         if (!vc->gfx.ds) {
 108             return;
 109         }
 110         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 111                        vc->gfx.esurface, vc->gfx.ectx);
 112
 113         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
 114         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
 115
 116         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 117
 118         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
 119         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
 120
 121         glFlush();
 122     }
 123 }
 124
 125 void gd_egl_update(DisplayChangeListener *dcl,
 126                    int x, int y, int w, int h)
 127 {
 128     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 129
 130     if (!vc->gfx.gls || !vc->gfx.ds) {
 131         return;
 132     }
 133
 134     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 135                    vc->gfx.esurface, vc->gfx.ectx);
 136     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 137     vc->gfx.glupdates++;
 138 }
 139
 140 void gd_egl_refresh(DisplayChangeListener *dcl)
 141 {
 142     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 143
 144     gd_update_monitor_refresh_rate(
 145             vc, vc->window ? vc->window : vc->gfx.drawing_area);
 146
 147     if (!vc->gfx.esurface) {
 148         gd_egl_init(vc);
 149         if (!vc->gfx.esurface) {
 150             return;
 151         }
 152         vc->gfx.gls = qemu_gl_init_shader();
 153         if (vc->gfx.ds) {
 154             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 155             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 156         }
 157 #ifdef CONFIG_GBM
 158         if (vc->gfx.guest_fb.dmabuf) {
 159             egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
 160             gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
 161         }
 162 #endif
 163     }
 164
 165     graphic_hw_update(dcl->con);
 166
 167     if (vc->gfx.glupdates) {
 168         vc->gfx.glupdates = 0;
 169         gtk_egl_set_scanout_mode(vc, false);
 170         gd_egl_draw(vc);
 171     }
 172 }
 173
 174 void gd_egl_switch(DisplayChangeListener *dcl,
 175                    DisplaySurface *surface)
 176 {
 177     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 178     bool resized = true;
 179
 180     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 181
 182     if (vc->gfx.ds &&
 183         surface_width(vc->gfx.ds) == surface_width(surface) &&
 184         surface_height(vc->gfx.ds) == surface_height(surface)) {
 185         resized = false;
 186     }
 187     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 188                    vc->gfx.esurface, vc->gfx.ectx);
 189
 190     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 191     vc->gfx.ds = surface;
 192     if (vc->gfx.gls) {
 193         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 194     }
 195
 196     if (resized) {
 197         gd_update_windowsize(vc);
 198     }
 199
 200     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
 201                    EGL_NO_CONTEXT);
 202 }
 203
 204 QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
 205                                     QEMUGLParams *params)
 206 {
 207     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 208
 209     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 210                    vc->gfx.esurface, vc->gfx.ectx);
 211     return qemu_egl_create_context(dgc, params);
 212 }
 213
 214 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
 215 {
 216     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 217
 218     vc->gfx.w = 0;
 219     vc->gfx.h = 0;
 220     gtk_egl_set_scanout_mode(vc, false);
 221 }
 222
 223 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
 224                             uint32_t backing_id, bool backing_y_0_top,
 225                             uint32_t backing_width, uint32_t backing_height,
 226                             uint32_t x, uint32_t y,
 227                             uint32_t w, uint32_t h,
 228                             void *d3d_tex2d)
 229 {
 230     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 231
 232     vc->gfx.x = x;
 233     vc->gfx.y = y;
 234     vc->gfx.w = w;
 235     vc->gfx.h = h;
 236     vc->gfx.y0_top = backing_y_0_top;
 237
 238     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 239                    vc->gfx.esurface, vc->gfx.ectx);
 240
 241     gtk_egl_set_scanout_mode(vc, true);
 242     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 243                          backing_id, false);
 244 }
 245
 246 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
 247                            QemuDmaBuf *dmabuf)
 248 {
 249 #ifdef CONFIG_GBM
 250     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 251
 252     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 253                    vc->gfx.esurface, vc->gfx.ectx);
 254
 255     egl_dmabuf_import_texture(dmabuf);
 256     if (!dmabuf->texture) {
 257         return;
 258     }
 259
 260     gd_egl_scanout_texture(dcl, dmabuf->texture,
 261                            dmabuf->y0_top, dmabuf->width, dmabuf->height,
 262                            dmabuf->x, dmabuf->y, dmabuf->scanout_width,
 263                            dmabuf->scanout_height, NULL);
 264
 265     if (dmabuf->allow_fences) {
 266         vc->gfx.guest_fb.dmabuf = dmabuf;
 267     }
 268 #endif
 269 }
 270
 271 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
 272                           QemuDmaBuf *dmabuf, bool have_hot,
 273                           uint32_t hot_x, uint32_t hot_y)
 274 {
 275 #ifdef CONFIG_GBM
 276     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 277
 278     if (dmabuf) {
 279         egl_dmabuf_import_texture(dmabuf);
 280         if (!dmabuf->texture) {
 281             return;
 282         }
 283         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
 284                              dmabuf->texture, false);
 285     } else {
 286         egl_fb_destroy(&vc->gfx.cursor_fb);
 287     }
 288 #endif
 289 }
 290
 291 void gd_egl_cursor_position(DisplayChangeListener *dcl,
 292                             uint32_t pos_x, uint32_t pos_y)
 293 {
 294     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 295
 296     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
 297     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
 298 }
 299
 300 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
 301                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 302 {
 303     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 304     GdkWindow *window;
 305     int ww, wh;
 306
 307     if (!vc->gfx.scanout_mode) {
 308         return;
 309     }
 310     if (!vc->gfx.guest_fb.framebuffer) {
 311         return;
 312     }
 313
 314     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 315                    vc->gfx.esurface, vc->gfx.ectx);
 316
 317     window = gtk_widget_get_window(vc->gfx.drawing_area);
 318     ww = gdk_window_get_width(window);
 319     wh = gdk_window_get_height(window);
 320     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
 321     if (vc->gfx.cursor_fb.texture) {
 322         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
 323                          vc->gfx.y0_top);
 324         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
 325                           vc->gfx.y0_top,
 326                           vc->gfx.cursor_x, vc->gfx.cursor_y,
 327                           vc->gfx.scale_x, vc->gfx.scale_y);
 328     } else {
 329         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
 330     }
 331
 332 #ifdef CONFIG_GBM
 333     if (vc->gfx.guest_fb.dmabuf) {
 334         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
 335     }
 336 #endif
 337
 338     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 339 }
 340
 341 void gd_egl_flush(DisplayChangeListener *dcl,
 342                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 343 {
 344     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 345     GtkWidget *area = vc->gfx.drawing_area;
 346
 347     if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) {
 348         graphic_hw_gl_block(vc->gfx.dcl.con, true);
 349         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
 350         gtk_widget_queue_draw_area(area, x, y, w, h);
 351         return;
 352     }
 353
 354     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
 355 }
 356
 357 void gtk_egl_init(DisplayGLMode mode)
 358 {
 359     GdkDisplay *gdk_display = gdk_display_get_default();
 360     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 361
 362     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
 363         return;
 364     }
 365
 366     display_opengl = 1;
 367 }
 368
 369 int gd_egl_make_current(DisplayGLCtx *dgc,
 370                         QEMUGLContext ctx)
 371 {
 372     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 373
 374     if (!eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 375                         vc->gfx.esurface, ctx)) {
 376         error_report("egl: eglMakeCurrent failed: %s", qemu_egl_get_error_string());
 377         return -1;
 378     }
 379
 380     return 0;
 381 }