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
  16 #include "trace.h"
  17
  18 #include "ui/console.h"
  19 #include "ui/gtk.h"
  20 #include "ui/egl-helpers.h"
  21 #include "ui/shader.h"
  22
  23 #include "sysemu/sysemu.h"
  24
  25 static void gtk_egl_set_scanout_mode(VirtualConsole *vc, bool scanout)
  26 {
  27     if (vc->gfx.scanout_mode == scanout) {
  28         return;
  29     }
  30
  31     vc->gfx.scanout_mode = scanout;
  32     if (!vc->gfx.scanout_mode) {
  33         egl_fb_destroy(&vc->gfx.guest_fb);
  34         if (vc->gfx.surface) {
  35             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
  36             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
  37         }
  38     }
  39 }
  40
  41 /** DisplayState Callbacks (opengl version) **/
  42
  43 void gd_egl_init(VirtualConsole *vc)
  44 {
  45     GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
  46     if (!gdk_window) {
  47         return;
  48     }
  49
  50     Window x11_window = gdk_x11_window_get_xid(gdk_window);
  51     if (!x11_window) {
  52         return;
  53     }
  54
  55     vc->gfx.ectx = qemu_egl_init_ctx();
  56     vc->gfx.esurface = qemu_egl_init_surface_x11
  57         (vc->gfx.ectx, (EGLNativeWindowType)x11_window);
  58
  59     assert(vc->gfx.esurface);
  60 }
  61
  62 void gd_egl_draw(VirtualConsole *vc)
  63 {
  64     GdkWindow *window;
  65     int ww, wh;
  66
  67     if (!vc->gfx.gls) {
  68         return;
  69     }
  70
  71     window = gtk_widget_get_window(vc->gfx.drawing_area);
  72     ww = gdk_window_get_width(window);
  73     wh = gdk_window_get_height(window);
  74
  75     if (vc->gfx.scanout_mode) {
  76         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
  77
  78         vc->gfx.scale_x = (double)ww / vc->gfx.w;
  79         vc->gfx.scale_y = (double)wh / vc->gfx.h;
  80     } else {
  81         if (!vc->gfx.ds) {
  82             return;
  83         }
  84         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
  85                        vc->gfx.esurface, vc->gfx.ectx);
  86
  87         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
  88         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
  89
  90         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
  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
  96     glFlush();
  97     graphic_hw_gl_flushed(vc->gfx.dcl.con);
  98 }
  99
 100 void gd_egl_update(DisplayChangeListener *dcl,
 101                    int x, int y, int w, int h)
 102 {
 103     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 104
 105     if (!vc->gfx.gls || !vc->gfx.ds) {
 106         return;
 107     }
 108
 109     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 110                    vc->gfx.esurface, vc->gfx.ectx);
 111     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 112     vc->gfx.glupdates++;
 113 }
 114
 115 void gd_egl_refresh(DisplayChangeListener *dcl)
 116 {
 117     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 118
 119     vc->gfx.dcl.update_interval = gd_monitor_update_interval(
 120             vc->window ? vc->window : vc->gfx.drawing_area);
 121
 122     if (!vc->gfx.esurface) {
 123         gd_egl_init(vc);
 124         if (!vc->gfx.esurface) {
 125             return;
 126         }
 127         vc->gfx.gls = qemu_gl_init_shader();
 128         if (vc->gfx.ds) {
 129             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 130         }
 131     }
 132
 133     graphic_hw_update(dcl->con);
 134
 135     if (vc->gfx.glupdates) {
 136         vc->gfx.glupdates = 0;
 137         gtk_egl_set_scanout_mode(vc, false);
 138         gd_egl_draw(vc);
 139     }
 140 }
 141
 142 void gd_egl_switch(DisplayChangeListener *dcl,
 143                    DisplaySurface *surface)
 144 {
 145     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 146     bool resized = true;
 147
 148     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 149
 150     if (vc->gfx.ds &&
 151         surface_width(vc->gfx.ds) == surface_width(surface) &&
 152         surface_height(vc->gfx.ds) == surface_height(surface)) {
 153         resized = false;
 154     }
 155
 156     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 157     vc->gfx.ds = surface;
 158     if (vc->gfx.gls) {
 159         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 160     }
 161
 162     if (resized) {
 163         gd_update_windowsize(vc);
 164     }
 165 }
 166
 167 QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
 168                                     QEMUGLParams *params)
 169 {
 170     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 171
 172     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 173                    vc->gfx.esurface, vc->gfx.ectx);
 174     return qemu_egl_create_context(dcl, params);
 175 }
 176
 177 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
 178 {
 179     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 180
 181     vc->gfx.w = 0;
 182     vc->gfx.h = 0;
 183     gtk_egl_set_scanout_mode(vc, false);
 184 }
 185
 186 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
 187                             uint32_t backing_id, bool backing_y_0_top,
 188                             uint32_t backing_width, uint32_t backing_height,
 189                             uint32_t x, uint32_t y,
 190                             uint32_t w, uint32_t h)
 191 {
 192     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 193
 194     vc->gfx.x = x;
 195     vc->gfx.y = y;
 196     vc->gfx.w = w;
 197     vc->gfx.h = h;
 198     vc->gfx.y0_top = backing_y_0_top;
 199
 200     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 201                    vc->gfx.esurface, vc->gfx.ectx);
 202
 203     gtk_egl_set_scanout_mode(vc, true);
 204     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 205                          backing_id, false);
 206 }
 207
 208 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
 209                            QemuDmaBuf *dmabuf)
 210 {
 211 #ifdef CONFIG_OPENGL_DMABUF
 212     egl_dmabuf_import_texture(dmabuf);
 213     if (!dmabuf->texture) {
 214         return;
 215     }
 216
 217     gd_egl_scanout_texture(dcl, dmabuf->texture,
 218                            false, dmabuf->width, dmabuf->height,
 219                            0, 0, dmabuf->width, dmabuf->height);
 220 #endif
 221 }
 222
 223 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
 224                           QemuDmaBuf *dmabuf, bool have_hot,
 225                           uint32_t hot_x, uint32_t hot_y)
 226 {
 227 #ifdef CONFIG_OPENGL_DMABUF
 228     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 229
 230     if (dmabuf) {
 231         egl_dmabuf_import_texture(dmabuf);
 232         if (!dmabuf->texture) {
 233             return;
 234         }
 235         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
 236                              dmabuf->texture, false);
 237     } else {
 238         egl_fb_destroy(&vc->gfx.cursor_fb);
 239     }
 240 #endif
 241 }
 242
 243 void gd_egl_cursor_position(DisplayChangeListener *dcl,
 244                             uint32_t pos_x, uint32_t pos_y)
 245 {
 246     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 247
 248     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
 249     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
 250 }
 251
 252 void gd_egl_release_dmabuf(DisplayChangeListener *dcl,
 253                            QemuDmaBuf *dmabuf)
 254 {
 255 #ifdef CONFIG_OPENGL_DMABUF
 256     egl_dmabuf_release_texture(dmabuf);
 257 #endif
 258 }
 259
 260 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
 261                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 262 {
 263     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 264     GdkWindow *window;
 265     int ww, wh;
 266
 267     if (!vc->gfx.scanout_mode) {
 268         return;
 269     }
 270     if (!vc->gfx.guest_fb.framebuffer) {
 271         return;
 272     }
 273
 274     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 275                    vc->gfx.esurface, vc->gfx.ectx);
 276
 277     window = gtk_widget_get_window(vc->gfx.drawing_area);
 278     ww = gdk_window_get_width(window);
 279     wh = gdk_window_get_height(window);
 280     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
 281     if (vc->gfx.cursor_fb.texture) {
 282         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
 283                          vc->gfx.y0_top);
 284         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
 285                           vc->gfx.y0_top,
 286                           vc->gfx.cursor_x, vc->gfx.cursor_y,
 287                           vc->gfx.scale_x, vc->gfx.scale_y);
 288     } else {
 289         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
 290     }
 291
 292     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 293 }
 294
 295 void gtk_egl_init(DisplayGLMode mode)
 296 {
 297     GdkDisplay *gdk_display = gdk_display_get_default();
 298     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 299
 300     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
 301         return;
 302     }
 303
 304     display_opengl = 1;
 305 }
 306
 307 int gd_egl_make_current(DisplayChangeListener *dcl,
 308                         QEMUGLContext ctx)
 309 {
 310     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 311
 312     return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 313                           vc->gfx.esurface, ctx);
 314 }