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