xref: /openbmc/qemu/ui/gtk-egl.c (revision efb91426) 
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, ws;
73 
74     if (!vc->gfx.gls) {
75         return;
76     }
77 
78     window = gtk_widget_get_window(vc->gfx.drawing_area);
79     ws = gdk_window_get_scale_factor(window);
80     ww = gdk_window_get_width(window) * ws;
81     wh = gdk_window_get_height(window) * ws;
82 
83     if (vc->gfx.scanout_mode) {
84 #ifdef CONFIG_GBM
85         if (dmabuf) {
86             if (!dmabuf->draw_submitted) {
87                 return;
88             } else {
89                 dmabuf->draw_submitted = false;
90             }
91         }
92 #endif
93         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
94 
95         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
96         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
97 
98         glFlush();
99 #ifdef CONFIG_GBM
100         if (dmabuf) {
101             egl_dmabuf_create_fence(dmabuf);
102             if (dmabuf->fence_fd > 0) {
103                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
104                 return;
105             }
106             graphic_hw_gl_block(vc->gfx.dcl.con, false);
107         }
108 #endif
109     } else {
110         if (!vc->gfx.ds) {
111             return;
112         }
113         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
114                        vc->gfx.esurface, vc->gfx.ectx);
115 
116         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
117         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
118 
119         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
120 
121         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
122         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
123 
124         glFlush();
125     }
126 }
127 
128 void gd_egl_update(DisplayChangeListener *dcl,
129                    int x, int y, int w, int h)
130 {
131     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
132 
133     if (!vc->gfx.gls || !vc->gfx.ds) {
134         return;
135     }
136 
137     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
138                    vc->gfx.esurface, vc->gfx.ectx);
139     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
140     vc->gfx.glupdates++;
141     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE,
142                    EGL_NO_SURFACE, EGL_NO_CONTEXT);
143 }
144 
145 void gd_egl_refresh(DisplayChangeListener *dcl)
146 {
147     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
148 
149     gd_update_monitor_refresh_rate(
150             vc, vc->window ? vc->window : vc->gfx.drawing_area);
151 
152     if (vc->gfx.guest_fb.dmabuf && vc->gfx.guest_fb.dmabuf->draw_submitted) {
153         return;
154     }
155 
156     if (!vc->gfx.esurface) {
157         gd_egl_init(vc);
158         if (!vc->gfx.esurface) {
159             return;
160         }
161         vc->gfx.gls = qemu_gl_init_shader();
162         if (vc->gfx.ds) {
163             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
164             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
165         }
166 #ifdef CONFIG_GBM
167         if (vc->gfx.guest_fb.dmabuf) {
168             egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
169             gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
170         }
171 #endif
172     }
173 
174     graphic_hw_update(dcl->con);
175 
176     if (vc->gfx.glupdates) {
177         vc->gfx.glupdates = 0;
178         gtk_egl_set_scanout_mode(vc, false);
179         gd_egl_draw(vc);
180     }
181 }
182 
183 void gd_egl_switch(DisplayChangeListener *dcl,
184                    DisplaySurface *surface)
185 {
186     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
187     bool resized = true;
188 
189     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
190 
191     if (vc->gfx.ds &&
192         surface_width(vc->gfx.ds) == surface_width(surface) &&
193         surface_height(vc->gfx.ds) == surface_height(surface)) {
194         resized = false;
195     }
196     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
197                    vc->gfx.esurface, vc->gfx.ectx);
198 
199     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
200     vc->gfx.ds = surface;
201     if (vc->gfx.gls) {
202         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
203     }
204 
205     if (resized) {
206         gd_update_windowsize(vc);
207     }
208 
209     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
210                    EGL_NO_CONTEXT);
211 }
212 
213 QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
214                                     QEMUGLParams *params)
215 {
216     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
217 
218     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
219                    vc->gfx.esurface, vc->gfx.ectx);
220     return qemu_egl_create_context(dgc, params);
221 }
222 
223 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
224 {
225     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
226 
227     vc->gfx.w = 0;
228     vc->gfx.h = 0;
229     gtk_egl_set_scanout_mode(vc, false);
230 }
231 
232 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
233                             uint32_t backing_id, bool backing_y_0_top,
234                             uint32_t backing_width, uint32_t backing_height,
235                             uint32_t x, uint32_t y,
236                             uint32_t w, uint32_t h,
237                             void *d3d_tex2d)
238 {
239     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
240 
241     vc->gfx.x = x;
242     vc->gfx.y = y;
243     vc->gfx.w = w;
244     vc->gfx.h = h;
245     vc->gfx.y0_top = backing_y_0_top;
246 
247     if (!vc->gfx.esurface) {
248         gd_egl_init(vc);
249         if (!vc->gfx.esurface) {
250             return;
251         }
252     }
253 
254     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
255                    vc->gfx.esurface, vc->gfx.ectx);
256 
257     gtk_egl_set_scanout_mode(vc, true);
258     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
259                          backing_id, false);
260 }
261 
262 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
263                            QemuDmaBuf *dmabuf)
264 {
265 #ifdef CONFIG_GBM
266     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
267 
268     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
269                    vc->gfx.esurface, vc->gfx.ectx);
270 
271     egl_dmabuf_import_texture(dmabuf);
272     if (!dmabuf->texture) {
273         return;
274     }
275 
276     gd_egl_scanout_texture(dcl, dmabuf->texture,
277                            dmabuf->y0_top,
278                            dmabuf->backing_width, dmabuf->backing_height,
279                            dmabuf->x, dmabuf->y, dmabuf->width,
280                            dmabuf->height, NULL);
281 
282     if (dmabuf->allow_fences) {
283         vc->gfx.guest_fb.dmabuf = dmabuf;
284     }
285 #endif
286 }
287 
288 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
289                           QemuDmaBuf *dmabuf, bool have_hot,
290                           uint32_t hot_x, uint32_t hot_y)
291 {
292 #ifdef CONFIG_GBM
293     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
294 
295     if (dmabuf) {
296         egl_dmabuf_import_texture(dmabuf);
297         if (!dmabuf->texture) {
298             return;
299         }
300         egl_fb_setup_for_tex(&vc->gfx.cursor_fb,
301                              dmabuf->backing_width, dmabuf->backing_height,
302                              dmabuf->texture, false);
303     } else {
304         egl_fb_destroy(&vc->gfx.cursor_fb);
305     }
306 #endif
307 }
308 
309 void gd_egl_cursor_position(DisplayChangeListener *dcl,
310                             uint32_t pos_x, uint32_t pos_y)
311 {
312     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
313 
314     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
315     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
316 }
317 
318 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
319                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
320 {
321     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
322     GdkWindow *window;
323     int ww, wh, ws;
324 
325     if (!vc->gfx.scanout_mode) {
326         return;
327     }
328     if (!vc->gfx.guest_fb.framebuffer) {
329         return;
330     }
331 
332     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
333                    vc->gfx.esurface, vc->gfx.ectx);
334 
335     window = gtk_widget_get_window(vc->gfx.drawing_area);
336     ws = gdk_window_get_scale_factor(window);
337     ww = gdk_window_get_width(window) * ws;
338     wh = gdk_window_get_height(window) * ws;
339     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
340     if (vc->gfx.cursor_fb.texture) {
341         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
342                          vc->gfx.y0_top);
343         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
344                           vc->gfx.y0_top,
345                           vc->gfx.cursor_x, vc->gfx.cursor_y,
346                           vc->gfx.scale_x, vc->gfx.scale_y);
347     } else {
348         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
349     }
350 
351 #ifdef CONFIG_GBM
352     if (vc->gfx.guest_fb.dmabuf) {
353         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
354     }
355 #endif
356 
357     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
358 }
359 
360 void gd_egl_flush(DisplayChangeListener *dcl,
361                   uint32_t x, uint32_t y, uint32_t w, uint32_t h)
362 {
363     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
364     GtkWidget *area = vc->gfx.drawing_area;
365 
366     if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) {
367         graphic_hw_gl_block(vc->gfx.dcl.con, true);
368         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
369         gtk_egl_set_scanout_mode(vc, true);
370         gtk_widget_queue_draw_area(area, x, y, w, h);
371         return;
372     }
373 
374     gd_egl_scanout_flush(&vc->gfx.dcl, x, y, w, h);
375 }
376 
377 void gtk_egl_init(DisplayGLMode mode)
378 {
379     GdkDisplay *gdk_display = gdk_display_get_default();
380     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
381 
382     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
383         return;
384     }
385 
386     display_opengl = 1;
387 }
388 
389 int gd_egl_make_current(DisplayGLCtx *dgc,
390                         QEMUGLContext ctx)
391 {
392     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
393 
394     if (!eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
395                         vc->gfx.esurface, ctx)) {
396         error_report("egl: eglMakeCurrent failed: %s", qemu_egl_get_error_string());
397         return -1;
398     }
399 
400     return 0;
401 }
402