xref: /openbmc/qemu/ui/gtk-egl.c (revision f0984d40) 
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     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
200                    EGL_NO_CONTEXT);
201 }
202 
203 QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
204                                     QEMUGLParams *params)
205 {
206     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
207 
208     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
209                    vc->gfx.esurface, vc->gfx.ectx);
210     return qemu_egl_create_context(dgc, params);
211 }
212 
213 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
214 {
215     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
216 
217     vc->gfx.w = 0;
218     vc->gfx.h = 0;
219     gtk_egl_set_scanout_mode(vc, false);
220 }
221 
222 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
223                             uint32_t backing_id, bool backing_y_0_top,
224                             uint32_t backing_width, uint32_t backing_height,
225                             uint32_t x, uint32_t y,
226                             uint32_t w, uint32_t h)
227 {
228     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
229 
230     vc->gfx.x = x;
231     vc->gfx.y = y;
232     vc->gfx.w = w;
233     vc->gfx.h = h;
234     vc->gfx.y0_top = backing_y_0_top;
235 
236     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
237                    vc->gfx.esurface, vc->gfx.ectx);
238 
239     gtk_egl_set_scanout_mode(vc, true);
240     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
241                          backing_id, false);
242 }
243 
244 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
245                            QemuDmaBuf *dmabuf)
246 {
247 #ifdef CONFIG_GBM
248     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
249 
250     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
251                    vc->gfx.esurface, vc->gfx.ectx);
252 
253     egl_dmabuf_import_texture(dmabuf);
254     if (!dmabuf->texture) {
255         return;
256     }
257 
258     gd_egl_scanout_texture(dcl, dmabuf->texture,
259                            false, dmabuf->width, dmabuf->height,
260                            0, 0, dmabuf->width, dmabuf->height);
261 
262     if (dmabuf->allow_fences) {
263         vc->gfx.guest_fb.dmabuf = dmabuf;
264     }
265 #endif
266 }
267 
268 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
269                           QemuDmaBuf *dmabuf, bool have_hot,
270                           uint32_t hot_x, uint32_t hot_y)
271 {
272 #ifdef CONFIG_GBM
273     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
274 
275     if (dmabuf) {
276         egl_dmabuf_import_texture(dmabuf);
277         if (!dmabuf->texture) {
278             return;
279         }
280         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
281                              dmabuf->texture, false);
282     } else {
283         egl_fb_destroy(&vc->gfx.cursor_fb);
284     }
285 #endif
286 }
287 
288 void gd_egl_cursor_position(DisplayChangeListener *dcl,
289                             uint32_t pos_x, uint32_t pos_y)
290 {
291     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
292 
293     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
294     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
295 }
296 
297 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
298                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
299 {
300     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
301     GdkWindow *window;
302     int ww, wh;
303 
304     if (!vc->gfx.scanout_mode) {
305         return;
306     }
307     if (!vc->gfx.guest_fb.framebuffer) {
308         return;
309     }
310 
311     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
312                    vc->gfx.esurface, vc->gfx.ectx);
313 
314     window = gtk_widget_get_window(vc->gfx.drawing_area);
315     ww = gdk_window_get_width(window);
316     wh = gdk_window_get_height(window);
317     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
318     if (vc->gfx.cursor_fb.texture) {
319         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
320                          vc->gfx.y0_top);
321         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
322                           vc->gfx.y0_top,
323                           vc->gfx.cursor_x, vc->gfx.cursor_y,
324                           vc->gfx.scale_x, vc->gfx.scale_y);
325     } else {
326         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
327     }
328 
329 #ifdef CONFIG_GBM
330     if (vc->gfx.guest_fb.dmabuf) {
331         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
332     }
333 #endif
334 
335     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
336 }
337 
338 void gd_egl_flush(DisplayChangeListener *dcl,
339                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
340 {
341     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
342     GtkWidget *area = vc->gfx.drawing_area;
343 
344     if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) {
345         graphic_hw_gl_block(vc->gfx.dcl.con, true);
346         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
347         gtk_widget_queue_draw_area(area, x, y, w, h);
348         return;
349     }
350 
351     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
352 }
353 
354 void gtk_egl_init(DisplayGLMode mode)
355 {
356     GdkDisplay *gdk_display = gdk_display_get_default();
357     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
358 
359     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
360         return;
361     }
362 
363     display_opengl = 1;
364 }
365 
366 int gd_egl_make_current(DisplayGLCtx *dgc,
367                         QEMUGLContext ctx)
368 {
369     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
370 
371     return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
372                           vc->gfx.esurface, ctx);
373 }
374