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