xref: /openbmc/qemu/ui/gtk-egl.c (revision ed3a06b1) 
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 
124 void gd_egl_update(DisplayChangeListener *dcl,
125                    int x, int y, int w, int h)
126 {
127     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
128 
129     if (!vc->gfx.gls || !vc->gfx.ds) {
130         return;
131     }
132 
133     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
134                    vc->gfx.esurface, vc->gfx.ectx);
135     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
136     vc->gfx.glupdates++;
137 }
138 
139 void gd_egl_refresh(DisplayChangeListener *dcl)
140 {
141     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
142 
143     gd_update_monitor_refresh_rate(
144             vc, vc->window ? vc->window : vc->gfx.drawing_area);
145 
146     if (!vc->gfx.esurface) {
147         gd_egl_init(vc);
148         if (!vc->gfx.esurface) {
149             return;
150         }
151         vc->gfx.gls = qemu_gl_init_shader();
152         if (vc->gfx.ds) {
153             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
154             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
155         }
156 #ifdef CONFIG_GBM
157         if (vc->gfx.guest_fb.dmabuf) {
158             egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
159             gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
160         }
161 #endif
162     }
163 
164     graphic_hw_update(dcl->con);
165 
166     if (vc->gfx.glupdates) {
167         vc->gfx.glupdates = 0;
168         gtk_egl_set_scanout_mode(vc, false);
169         gd_egl_draw(vc);
170     }
171 }
172 
173 void gd_egl_switch(DisplayChangeListener *dcl,
174                    DisplaySurface *surface)
175 {
176     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
177     bool resized = true;
178 
179     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
180 
181     if (vc->gfx.ds &&
182         surface_width(vc->gfx.ds) == surface_width(surface) &&
183         surface_height(vc->gfx.ds) == surface_height(surface)) {
184         resized = false;
185     }
186     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
187                    vc->gfx.esurface, vc->gfx.ectx);
188 
189     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
190     vc->gfx.ds = surface;
191     if (vc->gfx.gls) {
192         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
193     }
194 
195     if (resized) {
196         gd_update_windowsize(vc);
197     }
198 }
199 
200 QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
201                                     QEMUGLParams *params)
202 {
203     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
204 
205     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
206                    vc->gfx.esurface, vc->gfx.ectx);
207     return qemu_egl_create_context(dgc, params);
208 }
209 
210 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
211 {
212     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
213 
214     vc->gfx.w = 0;
215     vc->gfx.h = 0;
216     gtk_egl_set_scanout_mode(vc, false);
217 }
218 
219 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
220                             uint32_t backing_id, bool backing_y_0_top,
221                             uint32_t backing_width, uint32_t backing_height,
222                             uint32_t x, uint32_t y,
223                             uint32_t w, uint32_t h)
224 {
225     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
226 
227     vc->gfx.x = x;
228     vc->gfx.y = y;
229     vc->gfx.w = w;
230     vc->gfx.h = h;
231     vc->gfx.y0_top = backing_y_0_top;
232 
233     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
234                    vc->gfx.esurface, vc->gfx.ectx);
235 
236     gtk_egl_set_scanout_mode(vc, true);
237     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
238                          backing_id, false);
239 }
240 
241 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
242                            QemuDmaBuf *dmabuf)
243 {
244 #ifdef CONFIG_GBM
245     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
246 
247     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
248                    vc->gfx.esurface, vc->gfx.ectx);
249 
250     egl_dmabuf_import_texture(dmabuf);
251     if (!dmabuf->texture) {
252         return;
253     }
254 
255     gd_egl_scanout_texture(dcl, dmabuf->texture,
256                            false, dmabuf->width, dmabuf->height,
257                            0, 0, dmabuf->width, dmabuf->height);
258 
259     if (dmabuf->allow_fences) {
260         vc->gfx.guest_fb.dmabuf = dmabuf;
261     }
262 #endif
263 }
264 
265 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
266                           QemuDmaBuf *dmabuf, bool have_hot,
267                           uint32_t hot_x, uint32_t hot_y)
268 {
269 #ifdef CONFIG_GBM
270     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
271 
272     if (dmabuf) {
273         egl_dmabuf_import_texture(dmabuf);
274         if (!dmabuf->texture) {
275             return;
276         }
277         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
278                              dmabuf->texture, false);
279     } else {
280         egl_fb_destroy(&vc->gfx.cursor_fb);
281     }
282 #endif
283 }
284 
285 void gd_egl_cursor_position(DisplayChangeListener *dcl,
286                             uint32_t pos_x, uint32_t pos_y)
287 {
288     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
289 
290     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
291     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
292 }
293 
294 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
295                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
296 {
297     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
298     GdkWindow *window;
299     int ww, wh;
300 
301     if (!vc->gfx.scanout_mode) {
302         return;
303     }
304     if (!vc->gfx.guest_fb.framebuffer) {
305         return;
306     }
307 
308     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
309                    vc->gfx.esurface, vc->gfx.ectx);
310 
311     window = gtk_widget_get_window(vc->gfx.drawing_area);
312     ww = gdk_window_get_width(window);
313     wh = gdk_window_get_height(window);
314     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
315     if (vc->gfx.cursor_fb.texture) {
316         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
317                          vc->gfx.y0_top);
318         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
319                           vc->gfx.y0_top,
320                           vc->gfx.cursor_x, vc->gfx.cursor_y,
321                           vc->gfx.scale_x, vc->gfx.scale_y);
322     } else {
323         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
324     }
325 
326 #ifdef CONFIG_GBM
327     if (vc->gfx.guest_fb.dmabuf) {
328         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
329     }
330 #endif
331 
332     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
333 }
334 
335 void gd_egl_flush(DisplayChangeListener *dcl,
336                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
337 {
338     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
339     GtkWidget *area = vc->gfx.drawing_area;
340 
341     if (vc->gfx.guest_fb.dmabuf) {
342         graphic_hw_gl_block(vc->gfx.dcl.con, true);
343         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
344         gtk_widget_queue_draw_area(area, x, y, w, h);
345         return;
346     }
347 
348     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
349 }
350 
351 void gtk_egl_init(DisplayGLMode mode)
352 {
353     GdkDisplay *gdk_display = gdk_display_get_default();
354     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
355 
356     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
357         return;
358     }
359 
360     display_opengl = 1;
361 }
362 
363 int gd_egl_make_current(DisplayGLCtx *dgc,
364                         QEMUGLContext ctx)
365 {
366     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
367 
368     return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
369                           vc->gfx.esurface, ctx);
370 }
371