xref: /qemu/ui/gtk-egl.c (revision 6e0dc9d2) 
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/main-loop.h"
16 #include "qemu/error-report.h"
17 
18 #include "trace.h"
19 
20 #include "ui/console.h"
21 #include "ui/gtk.h"
22 #include "ui/egl-helpers.h"
23 #include "ui/shader.h"
24 
25 #include "sysemu/sysemu.h"
26 
27 static void gtk_egl_set_scanout_mode(VirtualConsole *vc, bool scanout)
28 {
29     if (vc->gfx.scanout_mode == scanout) {
30         return;
31     }
32 
33     vc->gfx.scanout_mode = scanout;
34     if (!vc->gfx.scanout_mode) {
35         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
36                        vc->gfx.esurface, vc->gfx.ectx);
37         egl_fb_destroy(&vc->gfx.guest_fb);
38         if (vc->gfx.surface) {
39             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
40             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
41         }
42     }
43 }
44 
45 /** DisplayState Callbacks (opengl version) **/
46 
47 void gd_egl_init(VirtualConsole *vc)
48 {
49     GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
50     if (!gdk_window) {
51         return;
52     }
53 
54     Window x11_window = gdk_x11_window_get_xid(gdk_window);
55     if (!x11_window) {
56         return;
57     }
58 
59     vc->gfx.ectx = qemu_egl_init_ctx();
60     vc->gfx.esurface = qemu_egl_init_surface_x11
61         (vc->gfx.ectx, (EGLNativeWindowType)x11_window);
62 
63     assert(vc->gfx.esurface);
64 }
65 
66 void gd_egl_draw(VirtualConsole *vc)
67 {
68     GdkWindow *window;
69 #ifdef CONFIG_GBM
70     QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
71 #endif
72     int ww, wh;
73 
74     if (!vc->gfx.gls) {
75         return;
76     }
77 
78     window = gtk_widget_get_window(vc->gfx.drawing_area);
79     ww = gdk_window_get_width(window);
80     wh = gdk_window_get_height(window);
81 
82     if (vc->gfx.scanout_mode) {
83 #ifdef CONFIG_GBM
84         if (dmabuf) {
85             if (!dmabuf->draw_submitted) {
86                 return;
87             } else {
88                 dmabuf->draw_submitted = false;
89             }
90         }
91 #endif
92         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
93 
94         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
95         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
96 
97         glFlush();
98 #ifdef CONFIG_GBM
99         if (dmabuf) {
100             egl_dmabuf_create_fence(dmabuf);
101             if (dmabuf->fence_fd > 0) {
102                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
103                 return;
104             }
105             graphic_hw_gl_block(vc->gfx.dcl.con, false);
106         }
107 #endif
108     } else {
109         if (!vc->gfx.ds) {
110             return;
111         }
112         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
113                        vc->gfx.esurface, vc->gfx.ectx);
114 
115         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
116         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
117 
118         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
119 
120         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
121         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
122 
123         glFlush();
124     }
125 }
126 
127 void gd_egl_update(DisplayChangeListener *dcl,
128                    int x, int y, int w, int h)
129 {
130     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
131 
132     if (!vc->gfx.gls || !vc->gfx.ds) {
133         return;
134     }
135 
136     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
137                    vc->gfx.esurface, vc->gfx.ectx);
138     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
139     vc->gfx.glupdates++;
140     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE,
141                    EGL_NO_SURFACE, EGL_NO_CONTEXT);
142 }
143 
144 void gd_egl_refresh(DisplayChangeListener *dcl)
145 {
146     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
147 
148     gd_update_monitor_refresh_rate(
149             vc, vc->window ? vc->window : vc->gfx.drawing_area);
150 
151     if (vc->gfx.guest_fb.dmabuf && vc->gfx.guest_fb.dmabuf->draw_submitted) {
152         return;
153     }
154 
155     if (!vc->gfx.esurface) {
156         gd_egl_init(vc);
157         if (!vc->gfx.esurface) {
158             return;
159         }
160         vc->gfx.gls = qemu_gl_init_shader();
161         if (vc->gfx.ds) {
162             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
163             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
164         }
165 #ifdef CONFIG_GBM
166         if (vc->gfx.guest_fb.dmabuf) {
167             egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
168             gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
169         }
170 #endif
171     }
172 
173     graphic_hw_update(dcl->con);
174 
175     if (vc->gfx.glupdates) {
176         vc->gfx.glupdates = 0;
177         gtk_egl_set_scanout_mode(vc, false);
178         gd_egl_draw(vc);
179     }
180 }
181 
182 void gd_egl_switch(DisplayChangeListener *dcl,
183                    DisplaySurface *surface)
184 {
185     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
186     bool resized = true;
187 
188     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
189 
190     if (vc->gfx.ds &&
191         surface_width(vc->gfx.ds) == surface_width(surface) &&
192         surface_height(vc->gfx.ds) == surface_height(surface)) {
193         resized = false;
194     }
195     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
196                    vc->gfx.esurface, vc->gfx.ectx);
197 
198     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
199     vc->gfx.ds = surface;
200     if (vc->gfx.gls) {
201         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
202     }
203 
204     if (resized) {
205         gd_update_windowsize(vc);
206     }
207 
208     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
209                    EGL_NO_CONTEXT);
210 }
211 
212 QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
213                                     QEMUGLParams *params)
214 {
215     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
216 
217     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
218                    vc->gfx.esurface, vc->gfx.ectx);
219     return qemu_egl_create_context(dgc, params);
220 }
221 
222 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
223 {
224     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
225 
226     vc->gfx.w = 0;
227     vc->gfx.h = 0;
228     gtk_egl_set_scanout_mode(vc, false);
229 }
230 
231 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
232                             uint32_t backing_id, bool backing_y_0_top,
233                             uint32_t backing_width, uint32_t backing_height,
234                             uint32_t x, uint32_t y,
235                             uint32_t w, uint32_t h,
236                             void *d3d_tex2d)
237 {
238     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
239 
240     vc->gfx.x = x;
241     vc->gfx.y = y;
242     vc->gfx.w = w;
243     vc->gfx.h = h;
244     vc->gfx.y0_top = backing_y_0_top;
245 
246     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
247                    vc->gfx.esurface, vc->gfx.ectx);
248 
249     gtk_egl_set_scanout_mode(vc, true);
250     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
251                          backing_id, false);
252 }
253 
254 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
255                            QemuDmaBuf *dmabuf)
256 {
257 #ifdef CONFIG_GBM
258     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
259 
260     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
261                    vc->gfx.esurface, vc->gfx.ectx);
262 
263     egl_dmabuf_import_texture(dmabuf);
264     if (!dmabuf->texture) {
265         return;
266     }
267 
268     gd_egl_scanout_texture(dcl, dmabuf->texture,
269                            dmabuf->y0_top,
270                            dmabuf->backing_width, dmabuf->backing_height,
271                            dmabuf->x, dmabuf->y, dmabuf->width,
272                            dmabuf->height, NULL);
273 
274     if (dmabuf->allow_fences) {
275         vc->gfx.guest_fb.dmabuf = dmabuf;
276     }
277 #endif
278 }
279 
280 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
281                           QemuDmaBuf *dmabuf, bool have_hot,
282                           uint32_t hot_x, uint32_t hot_y)
283 {
284 #ifdef CONFIG_GBM
285     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
286 
287     if (dmabuf) {
288         egl_dmabuf_import_texture(dmabuf);
289         if (!dmabuf->texture) {
290             return;
291         }
292         egl_fb_setup_for_tex(&vc->gfx.cursor_fb,
293                              dmabuf->backing_width, dmabuf->backing_height,
294                              dmabuf->texture, false);
295     } else {
296         egl_fb_destroy(&vc->gfx.cursor_fb);
297     }
298 #endif
299 }
300 
301 void gd_egl_cursor_position(DisplayChangeListener *dcl,
302                             uint32_t pos_x, uint32_t pos_y)
303 {
304     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
305 
306     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
307     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
308 }
309 
310 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
311                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
312 {
313     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
314     GdkWindow *window;
315     int ww, wh;
316 
317     if (!vc->gfx.scanout_mode) {
318         return;
319     }
320     if (!vc->gfx.guest_fb.framebuffer) {
321         return;
322     }
323 
324     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
325                    vc->gfx.esurface, vc->gfx.ectx);
326 
327     window = gtk_widget_get_window(vc->gfx.drawing_area);
328     ww = gdk_window_get_width(window);
329     wh = gdk_window_get_height(window);
330     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
331     if (vc->gfx.cursor_fb.texture) {
332         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
333                          vc->gfx.y0_top);
334         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
335                           vc->gfx.y0_top,
336                           vc->gfx.cursor_x, vc->gfx.cursor_y,
337                           vc->gfx.scale_x, vc->gfx.scale_y);
338     } else {
339         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
340     }
341 
342 #ifdef CONFIG_GBM
343     if (vc->gfx.guest_fb.dmabuf) {
344         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
345     }
346 #endif
347 
348     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
349 }
350 
351 void gd_egl_flush(DisplayChangeListener *dcl,
352                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
353 {
354     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
355     GtkWidget *area = vc->gfx.drawing_area;
356 
357     if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) {
358         graphic_hw_gl_block(vc->gfx.dcl.con, true);
359         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
360         gtk_egl_set_scanout_mode(vc, true);
361         gtk_widget_queue_draw_area(area, x, y, w, h);
362         return;
363     }
364 
365     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
366 }
367 
368 void gtk_egl_init(DisplayGLMode mode)
369 {
370     GdkDisplay *gdk_display = gdk_display_get_default();
371     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
372 
373     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
374         return;
375     }
376 
377     display_opengl = 1;
378 }
379 
380 int gd_egl_make_current(DisplayGLCtx *dgc,
381                         QEMUGLContext ctx)
382 {
383     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
384 
385     if (!eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
386                         vc->gfx.esurface, ctx)) {
387         error_report("egl: eglMakeCurrent failed: %s", qemu_egl_get_error_string());
388         return -1;
389     }
390 
391     return 0;
392 }
393