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