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