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