xref: /qemu/ui/gtk-egl.c (revision 727385c4) 
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 
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 #ifdef CONFIG_GBM
67     QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
68 #endif
69     int ww, wh;
70 
71     if (!vc->gfx.gls) {
72         return;
73     }
74 
75     window = gtk_widget_get_window(vc->gfx.drawing_area);
76     ww = gdk_window_get_width(window);
77     wh = gdk_window_get_height(window);
78 
79     if (vc->gfx.scanout_mode) {
80 #ifdef CONFIG_GBM
81         if (dmabuf) {
82             if (!dmabuf->draw_submitted) {
83                 return;
84             } else {
85                 dmabuf->draw_submitted = false;
86             }
87         }
88 #endif
89         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
90 
91         vc->gfx.scale_x = (double)ww / vc->gfx.w;
92         vc->gfx.scale_y = (double)wh / vc->gfx.h;
93 
94         glFlush();
95 #ifdef CONFIG_GBM
96         if (dmabuf) {
97             egl_dmabuf_create_fence(dmabuf);
98             if (dmabuf->fence_fd > 0) {
99                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
100                 return;
101             }
102             graphic_hw_gl_block(vc->gfx.dcl.con, false);
103         }
104 #endif
105     } else {
106         if (!vc->gfx.ds) {
107             return;
108         }
109         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
110                        vc->gfx.esurface, vc->gfx.ectx);
111 
112         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
113         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
114 
115         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
116 
117         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
118         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
119 
120         glFlush();
121     }
122 
123     graphic_hw_gl_flushed(vc->gfx.dcl.con);
124 }
125 
126 void gd_egl_update(DisplayChangeListener *dcl,
127                    int x, int y, int w, int h)
128 {
129     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
130 
131     if (!vc->gfx.gls || !vc->gfx.ds) {
132         return;
133     }
134 
135     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
136                    vc->gfx.esurface, vc->gfx.ectx);
137     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
138     vc->gfx.glupdates++;
139 }
140 
141 void gd_egl_refresh(DisplayChangeListener *dcl)
142 {
143     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
144 
145     vc->gfx.dcl.update_interval = gd_monitor_update_interval(
146             vc->window ? vc->window : vc->gfx.drawing_area);
147 
148     if (!vc->gfx.esurface) {
149         gd_egl_init(vc);
150         if (!vc->gfx.esurface) {
151             return;
152         }
153         vc->gfx.gls = qemu_gl_init_shader();
154         if (vc->gfx.ds) {
155             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
156             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
157         }
158 #ifdef CONFIG_GBM
159         if (vc->gfx.guest_fb.dmabuf) {
160             egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
161             gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
162         }
163 #endif
164     }
165 
166     graphic_hw_update(dcl->con);
167 
168     if (vc->gfx.glupdates) {
169         vc->gfx.glupdates = 0;
170         gtk_egl_set_scanout_mode(vc, false);
171         gd_egl_draw(vc);
172     }
173 }
174 
175 void gd_egl_switch(DisplayChangeListener *dcl,
176                    DisplaySurface *surface)
177 {
178     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
179     bool resized = true;
180 
181     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
182 
183     if (vc->gfx.ds &&
184         surface_width(vc->gfx.ds) == surface_width(surface) &&
185         surface_height(vc->gfx.ds) == surface_height(surface)) {
186         resized = false;
187     }
188     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
189                    vc->gfx.esurface, vc->gfx.ectx);
190 
191     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
192     vc->gfx.ds = surface;
193     if (vc->gfx.gls) {
194         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
195     }
196 
197     if (resized) {
198         gd_update_windowsize(vc);
199     }
200 }
201 
202 QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
203                                     QEMUGLParams *params)
204 {
205     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
206 
207     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
208                    vc->gfx.esurface, vc->gfx.ectx);
209     return qemu_egl_create_context(dcl, params);
210 }
211 
212 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
213 {
214     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
215 
216     vc->gfx.w = 0;
217     vc->gfx.h = 0;
218     gtk_egl_set_scanout_mode(vc, false);
219 }
220 
221 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
222                             uint32_t backing_id, bool backing_y_0_top,
223                             uint32_t backing_width, uint32_t backing_height,
224                             uint32_t x, uint32_t y,
225                             uint32_t w, uint32_t h)
226 {
227     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
228 
229     vc->gfx.x = x;
230     vc->gfx.y = y;
231     vc->gfx.w = w;
232     vc->gfx.h = h;
233     vc->gfx.y0_top = backing_y_0_top;
234 
235     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
236                    vc->gfx.esurface, vc->gfx.ectx);
237 
238     gtk_egl_set_scanout_mode(vc, true);
239     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
240                          backing_id, false);
241 }
242 
243 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
244                            QemuDmaBuf *dmabuf)
245 {
246 #ifdef CONFIG_GBM
247     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
248 
249     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
250                    vc->gfx.esurface, vc->gfx.ectx);
251 
252     egl_dmabuf_import_texture(dmabuf);
253     if (!dmabuf->texture) {
254         return;
255     }
256 
257     gd_egl_scanout_texture(dcl, dmabuf->texture,
258                            false, dmabuf->width, dmabuf->height,
259                            0, 0, dmabuf->width, dmabuf->height);
260 
261     if (dmabuf->allow_fences) {
262         vc->gfx.guest_fb.dmabuf = dmabuf;
263     }
264 #endif
265 }
266 
267 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
268                           QemuDmaBuf *dmabuf, bool have_hot,
269                           uint32_t hot_x, uint32_t hot_y)
270 {
271 #ifdef CONFIG_GBM
272     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
273 
274     if (dmabuf) {
275         egl_dmabuf_import_texture(dmabuf);
276         if (!dmabuf->texture) {
277             return;
278         }
279         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
280                              dmabuf->texture, false);
281     } else {
282         egl_fb_destroy(&vc->gfx.cursor_fb);
283     }
284 #endif
285 }
286 
287 void gd_egl_cursor_position(DisplayChangeListener *dcl,
288                             uint32_t pos_x, uint32_t pos_y)
289 {
290     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
291 
292     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
293     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
294 }
295 
296 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
297                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
298 {
299     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
300     GdkWindow *window;
301     int ww, wh;
302 
303     if (!vc->gfx.scanout_mode) {
304         return;
305     }
306     if (!vc->gfx.guest_fb.framebuffer) {
307         return;
308     }
309 
310     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
311                    vc->gfx.esurface, vc->gfx.ectx);
312 
313     window = gtk_widget_get_window(vc->gfx.drawing_area);
314     ww = gdk_window_get_width(window);
315     wh = gdk_window_get_height(window);
316     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
317     if (vc->gfx.cursor_fb.texture) {
318         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
319                          vc->gfx.y0_top);
320         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
321                           vc->gfx.y0_top,
322                           vc->gfx.cursor_x, vc->gfx.cursor_y,
323                           vc->gfx.scale_x, vc->gfx.scale_y);
324     } else {
325         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
326     }
327 
328 #ifdef CONFIG_GBM
329     if (vc->gfx.guest_fb.dmabuf) {
330         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
331     }
332 #endif
333 
334     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
335 }
336 
337 void gd_egl_flush(DisplayChangeListener *dcl,
338                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
339 {
340     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
341     GtkWidget *area = vc->gfx.drawing_area;
342 
343     if (vc->gfx.guest_fb.dmabuf) {
344         graphic_hw_gl_block(vc->gfx.dcl.con, true);
345         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
346         gtk_widget_queue_draw_area(area, x, y, w, h);
347         return;
348     }
349 
350     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
351 }
352 
353 void gtk_egl_init(DisplayGLMode mode)
354 {
355     GdkDisplay *gdk_display = gdk_display_get_default();
356     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
357 
358     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
359         return;
360     }
361 
362     display_opengl = 1;
363 }
364 
365 int gd_egl_make_current(DisplayChangeListener *dcl,
366                         QEMUGLContext ctx)
367 {
368     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
369 
370     return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
371                           vc->gfx.esurface, ctx);
372 }
373