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 #if GTK_CHECK_VERSION(3, 0, 0)
  52     Window x11_window = gdk_x11_window_get_xid(gdk_window);
  53 #else
  54     Window x11_window = gdk_x11_drawable_get_xid(gdk_window);
  55 #endif
  56     if (!x11_window) {
  57         return;
  58     }
  59
  60     vc->gfx.ectx = qemu_egl_init_ctx();
  61     vc->gfx.esurface = qemu_egl_init_surface_x11(vc->gfx.ectx, x11_window);
  62
  63     assert(vc->gfx.esurface);
  64 }
  65
  66 void gd_egl_draw(VirtualConsole *vc)
  67 {
  68     GdkWindow *window;
  69     int ww, wh;
  70
  71     if (!vc->gfx.gls) {
  72         return;
  73     }
  74
  75     if (vc->gfx.scanout_mode) {
  76         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
  77     } else {
  78         if (!vc->gfx.ds) {
  79             return;
  80         }
  81         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
  82                        vc->gfx.esurface, vc->gfx.ectx);
  83
  84         window = gtk_widget_get_window(vc->gfx.drawing_area);
  85         gdk_drawable_get_size(window, &ww, &wh);
  86         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
  87         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
  88
  89         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
  90     }
  91 }
  92
  93 void gd_egl_update(DisplayChangeListener *dcl,
  94                    int x, int y, int w, int h)
  95 {
  96     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
  97
  98     if (!vc->gfx.gls || !vc->gfx.ds) {
  99         return;
 100     }
 101
 102     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 103                    vc->gfx.esurface, vc->gfx.ectx);
 104     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 105     vc->gfx.glupdates++;
 106 }
 107
 108 void gd_egl_refresh(DisplayChangeListener *dcl)
 109 {
 110     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 111
 112     if (!vc->gfx.esurface) {
 113         gd_egl_init(vc);
 114         if (!vc->gfx.esurface) {
 115             return;
 116         }
 117         vc->gfx.gls = qemu_gl_init_shader();
 118         if (vc->gfx.ds) {
 119             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 120         }
 121     }
 122
 123     graphic_hw_update(dcl->con);
 124
 125     if (vc->gfx.glupdates) {
 126         vc->gfx.glupdates = 0;
 127         gtk_egl_set_scanout_mode(vc, false);
 128         gd_egl_draw(vc);
 129     }
 130 }
 131
 132 void gd_egl_switch(DisplayChangeListener *dcl,
 133                    DisplaySurface *surface)
 134 {
 135     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 136     bool resized = true;
 137
 138     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 139
 140     if (vc->gfx.ds &&
 141         surface_width(vc->gfx.ds) == surface_width(surface) &&
 142         surface_height(vc->gfx.ds) == surface_height(surface)) {
 143         resized = false;
 144     }
 145
 146     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 147     vc->gfx.ds = surface;
 148     if (vc->gfx.gls) {
 149         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 150     }
 151
 152     if (resized) {
 153         gd_update_windowsize(vc);
 154     }
 155 }
 156
 157 QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
 158                                     QEMUGLParams *params)
 159 {
 160     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 161
 162     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 163                    vc->gfx.esurface, vc->gfx.ectx);
 164     return qemu_egl_create_context(dcl, params);
 165 }
 166
 167 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
 168 {
 169     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 170
 171     vc->gfx.w = 0;
 172     vc->gfx.h = 0;
 173     gtk_egl_set_scanout_mode(vc, false);
 174 }
 175
 176 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
 177                             uint32_t backing_id, bool backing_y_0_top,
 178                             uint32_t backing_width, uint32_t backing_height,
 179                             uint32_t x, uint32_t y,
 180                             uint32_t w, uint32_t h)
 181 {
 182     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 183
 184     vc->gfx.x = x;
 185     vc->gfx.y = y;
 186     vc->gfx.w = w;
 187     vc->gfx.h = h;
 188     vc->gfx.y0_top = backing_y_0_top;
 189
 190     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 191                    vc->gfx.esurface, vc->gfx.ectx);
 192
 193     gtk_egl_set_scanout_mode(vc, true);
 194     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 195                          backing_id, false);
 196 }
 197
 198 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
 199                            QemuDmaBuf *dmabuf)
 200 {
 201 #ifdef CONFIG_OPENGL_DMABUF
 202     egl_dmabuf_import_texture(dmabuf);
 203     if (!dmabuf->texture) {
 204         return;
 205     }
 206
 207     gd_egl_scanout_texture(dcl, dmabuf->texture,
 208                            false, dmabuf->width, dmabuf->height,
 209                            0, 0, dmabuf->width, dmabuf->height);
 210 #endif
 211 }
 212
 213 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
 214                           QemuDmaBuf *dmabuf, bool have_hot,
 215                           uint32_t hot_x, uint32_t hot_y)
 216 {
 217 #ifdef CONFIG_OPENGL_DMABUF
 218     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 219
 220     if (dmabuf) {
 221         egl_dmabuf_import_texture(dmabuf);
 222         if (!dmabuf->texture) {
 223             return;
 224         }
 225         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
 226                              dmabuf->texture, false);
 227     } else {
 228         egl_fb_destroy(&vc->gfx.cursor_fb);
 229     }
 230 #endif
 231 }
 232
 233 void gd_egl_cursor_position(DisplayChangeListener *dcl,
 234                             uint32_t pos_x, uint32_t pos_y)
 235 {
 236     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 237
 238     vc->gfx.cursor_x = pos_x;
 239     vc->gfx.cursor_y = pos_y;
 240 }
 241
 242 void gd_egl_release_dmabuf(DisplayChangeListener *dcl,
 243                            QemuDmaBuf *dmabuf)
 244 {
 245 #ifdef CONFIG_OPENGL_DMABUF
 246     egl_dmabuf_release_texture(dmabuf);
 247 #endif
 248 }
 249
 250 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
 251                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 252 {
 253     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 254     GdkWindow *window;
 255     int ww, wh;
 256
 257     if (!vc->gfx.scanout_mode) {
 258         return;
 259     }
 260     if (!vc->gfx.guest_fb.framebuffer) {
 261         return;
 262     }
 263
 264     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 265                    vc->gfx.esurface, vc->gfx.ectx);
 266
 267     window = gtk_widget_get_window(vc->gfx.drawing_area);
 268     gdk_drawable_get_size(window, &ww, &wh);
 269     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
 270     if (vc->gfx.cursor_fb.texture) {
 271         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
 272                          vc->gfx.y0_top);
 273         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
 274                           vc->gfx.y0_top,
 275                           vc->gfx.cursor_x, vc->gfx.cursor_y);
 276     } else {
 277         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
 278     }
 279
 280     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 281 }
 282
 283 void gtk_egl_init(void)
 284 {
 285     GdkDisplay *gdk_display = gdk_display_get_default();
 286     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 287
 288     if (qemu_egl_init_dpy_x11(x11_display) < 0) {
 289         return;
 290     }
 291
 292     display_opengl = 1;
 293 }
 294
 295 int gd_egl_make_current(DisplayChangeListener *dcl,
 296                         QEMUGLContext ctx)
 297 {
 298     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 299
 300     return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 301                           vc->gfx.esurface, ctx);
 302 }