xref: /qemu/ui/gtk-egl.c (revision 2e8f72ac) 
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 
16 #include "trace.h"
17 
18 #include "ui/console.h"
19 #include "ui/gtk.h"
20 #include "ui/egl-helpers.h"
21 #include "ui/shader.h"
22 
23 #include "sysemu/sysemu.h"
24 
25 static void gtk_egl_set_scanout_mode(VirtualConsole *vc, bool scanout)
26 {
27     if (vc->gfx.scanout_mode == scanout) {
28         return;
29     }
30 
31     vc->gfx.scanout_mode = scanout;
32     if (!vc->gfx.scanout_mode) {
33         egl_fb_destroy(&vc->gfx.guest_fb);
34         if (vc->gfx.surface) {
35             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
36             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
37         }
38     }
39 }
40 
41 /** DisplayState Callbacks (opengl version) **/
42 
43 void gd_egl_init(VirtualConsole *vc)
44 {
45     GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
46     if (!gdk_window) {
47         return;
48     }
49 
50     Window x11_window = gdk_x11_window_get_xid(gdk_window);
51     if (!x11_window) {
52         return;
53     }
54 
55     vc->gfx.ectx = qemu_egl_init_ctx();
56     vc->gfx.esurface = qemu_egl_init_surface_x11
57         (vc->gfx.ectx, (EGLNativeWindowType)x11_window);
58 
59     assert(vc->gfx.esurface);
60 }
61 
62 void gd_egl_draw(VirtualConsole *vc)
63 {
64     GdkWindow *window;
65     int ww, wh;
66 
67     if (!vc->gfx.gls) {
68         return;
69     }
70 
71     window = gtk_widget_get_window(vc->gfx.drawing_area);
72     ww = gdk_window_get_width(window);
73     wh = gdk_window_get_height(window);
74 
75     if (vc->gfx.scanout_mode) {
76         gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
77 
78         vc->gfx.scale_x = (double)ww / vc->gfx.w;
79         vc->gfx.scale_y = (double)wh / vc->gfx.h;
80     } else {
81         if (!vc->gfx.ds) {
82             return;
83         }
84         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
85                        vc->gfx.esurface, vc->gfx.ectx);
86 
87         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
88         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
89 
90         eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
91 
92         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
93         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
94     }
95 }
96 
97 void gd_egl_update(DisplayChangeListener *dcl,
98                    int x, int y, int w, int h)
99 {
100     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
101 
102     if (!vc->gfx.gls || !vc->gfx.ds) {
103         return;
104     }
105 
106     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
107                    vc->gfx.esurface, vc->gfx.ectx);
108     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
109     vc->gfx.glupdates++;
110 }
111 
112 void gd_egl_refresh(DisplayChangeListener *dcl)
113 {
114     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
115 
116     vc->gfx.dcl.update_interval = gd_monitor_update_interval(
117             vc->window ? vc->window : vc->gfx.drawing_area);
118 
119     if (!vc->gfx.esurface) {
120         gd_egl_init(vc);
121         if (!vc->gfx.esurface) {
122             return;
123         }
124         vc->gfx.gls = qemu_gl_init_shader();
125         if (vc->gfx.ds) {
126             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
127         }
128     }
129 
130     graphic_hw_update(dcl->con);
131 
132     if (vc->gfx.glupdates) {
133         vc->gfx.glupdates = 0;
134         gtk_egl_set_scanout_mode(vc, false);
135         gd_egl_draw(vc);
136     }
137 }
138 
139 void gd_egl_switch(DisplayChangeListener *dcl,
140                    DisplaySurface *surface)
141 {
142     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
143     bool resized = true;
144 
145     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
146 
147     if (vc->gfx.ds &&
148         surface_width(vc->gfx.ds) == surface_width(surface) &&
149         surface_height(vc->gfx.ds) == surface_height(surface)) {
150         resized = false;
151     }
152 
153     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
154     vc->gfx.ds = surface;
155     if (vc->gfx.gls) {
156         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
157     }
158 
159     if (resized) {
160         gd_update_windowsize(vc);
161     }
162 }
163 
164 QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
165                                     QEMUGLParams *params)
166 {
167     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
168 
169     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
170                    vc->gfx.esurface, vc->gfx.ectx);
171     return qemu_egl_create_context(dcl, params);
172 }
173 
174 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
175 {
176     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
177 
178     vc->gfx.w = 0;
179     vc->gfx.h = 0;
180     gtk_egl_set_scanout_mode(vc, false);
181 }
182 
183 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
184                             uint32_t backing_id, bool backing_y_0_top,
185                             uint32_t backing_width, uint32_t backing_height,
186                             uint32_t x, uint32_t y,
187                             uint32_t w, uint32_t h)
188 {
189     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
190 
191     vc->gfx.x = x;
192     vc->gfx.y = y;
193     vc->gfx.w = w;
194     vc->gfx.h = h;
195     vc->gfx.y0_top = backing_y_0_top;
196 
197     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
198                    vc->gfx.esurface, vc->gfx.ectx);
199 
200     gtk_egl_set_scanout_mode(vc, true);
201     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
202                          backing_id, false);
203 }
204 
205 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
206                            QemuDmaBuf *dmabuf)
207 {
208 #ifdef CONFIG_OPENGL_DMABUF
209     egl_dmabuf_import_texture(dmabuf);
210     if (!dmabuf->texture) {
211         return;
212     }
213 
214     gd_egl_scanout_texture(dcl, dmabuf->texture,
215                            false, dmabuf->width, dmabuf->height,
216                            0, 0, dmabuf->width, dmabuf->height);
217 #endif
218 }
219 
220 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
221                           QemuDmaBuf *dmabuf, bool have_hot,
222                           uint32_t hot_x, uint32_t hot_y)
223 {
224 #ifdef CONFIG_OPENGL_DMABUF
225     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
226 
227     if (dmabuf) {
228         egl_dmabuf_import_texture(dmabuf);
229         if (!dmabuf->texture) {
230             return;
231         }
232         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
233                              dmabuf->texture, false);
234     } else {
235         egl_fb_destroy(&vc->gfx.cursor_fb);
236     }
237 #endif
238 }
239 
240 void gd_egl_cursor_position(DisplayChangeListener *dcl,
241                             uint32_t pos_x, uint32_t pos_y)
242 {
243     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
244 
245     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
246     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
247 }
248 
249 void gd_egl_release_dmabuf(DisplayChangeListener *dcl,
250                            QemuDmaBuf *dmabuf)
251 {
252 #ifdef CONFIG_OPENGL_DMABUF
253     egl_dmabuf_release_texture(dmabuf);
254 #endif
255 }
256 
257 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
258                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
259 {
260     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
261     GdkWindow *window;
262     int ww, wh;
263 
264     if (!vc->gfx.scanout_mode) {
265         return;
266     }
267     if (!vc->gfx.guest_fb.framebuffer) {
268         return;
269     }
270 
271     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
272                    vc->gfx.esurface, vc->gfx.ectx);
273 
274     window = gtk_widget_get_window(vc->gfx.drawing_area);
275     ww = gdk_window_get_width(window);
276     wh = gdk_window_get_height(window);
277     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
278     if (vc->gfx.cursor_fb.texture) {
279         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
280                          vc->gfx.y0_top);
281         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
282                           vc->gfx.y0_top,
283                           vc->gfx.cursor_x, vc->gfx.cursor_y,
284                           vc->gfx.scale_x, vc->gfx.scale_y);
285     } else {
286         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
287     }
288 
289     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
290 }
291 
292 void gtk_egl_init(DisplayGLMode mode)
293 {
294     GdkDisplay *gdk_display = gdk_display_get_default();
295     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
296 
297     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
298         return;
299     }
300 
301     display_opengl = 1;
302 }
303 
304 int gd_egl_make_current(DisplayChangeListener *dcl,
305                         QEMUGLContext ctx)
306 {
307     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
308 
309     return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
310                           vc->gfx.esurface, ctx);
311 }
312