xref: /qemu/ui/gtk-egl.c (revision f8a57777) 
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-common.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(vc->gfx.ectx, 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     if (!vc->gfx.esurface) {
117         gd_egl_init(vc);
118         if (!vc->gfx.esurface) {
119             return;
120         }
121         vc->gfx.gls = qemu_gl_init_shader();
122         if (vc->gfx.ds) {
123             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
124         }
125     }
126 
127     graphic_hw_update(dcl->con);
128 
129     if (vc->gfx.glupdates) {
130         vc->gfx.glupdates = 0;
131         gtk_egl_set_scanout_mode(vc, false);
132         gd_egl_draw(vc);
133     }
134 }
135 
136 void gd_egl_switch(DisplayChangeListener *dcl,
137                    DisplaySurface *surface)
138 {
139     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
140     bool resized = true;
141 
142     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
143 
144     if (vc->gfx.ds &&
145         surface_width(vc->gfx.ds) == surface_width(surface) &&
146         surface_height(vc->gfx.ds) == surface_height(surface)) {
147         resized = false;
148     }
149 
150     surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
151     vc->gfx.ds = surface;
152     if (vc->gfx.gls) {
153         surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
154     }
155 
156     if (resized) {
157         gd_update_windowsize(vc);
158     }
159 }
160 
161 QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
162                                     QEMUGLParams *params)
163 {
164     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
165 
166     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
167                    vc->gfx.esurface, vc->gfx.ectx);
168     return qemu_egl_create_context(dcl, params);
169 }
170 
171 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
172 {
173     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
174 
175     vc->gfx.w = 0;
176     vc->gfx.h = 0;
177     gtk_egl_set_scanout_mode(vc, false);
178 }
179 
180 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
181                             uint32_t backing_id, bool backing_y_0_top,
182                             uint32_t backing_width, uint32_t backing_height,
183                             uint32_t x, uint32_t y,
184                             uint32_t w, uint32_t h)
185 {
186     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
187 
188     vc->gfx.x = x;
189     vc->gfx.y = y;
190     vc->gfx.w = w;
191     vc->gfx.h = h;
192     vc->gfx.y0_top = backing_y_0_top;
193 
194     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
195                    vc->gfx.esurface, vc->gfx.ectx);
196 
197     gtk_egl_set_scanout_mode(vc, true);
198     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
199                          backing_id, false);
200 }
201 
202 void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
203                            QemuDmaBuf *dmabuf)
204 {
205 #ifdef CONFIG_OPENGL_DMABUF
206     egl_dmabuf_import_texture(dmabuf);
207     if (!dmabuf->texture) {
208         return;
209     }
210 
211     gd_egl_scanout_texture(dcl, dmabuf->texture,
212                            false, dmabuf->width, dmabuf->height,
213                            0, 0, dmabuf->width, dmabuf->height);
214 #endif
215 }
216 
217 void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
218                           QemuDmaBuf *dmabuf, bool have_hot,
219                           uint32_t hot_x, uint32_t hot_y)
220 {
221 #ifdef CONFIG_OPENGL_DMABUF
222     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
223 
224     if (dmabuf) {
225         egl_dmabuf_import_texture(dmabuf);
226         if (!dmabuf->texture) {
227             return;
228         }
229         egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
230                              dmabuf->texture, false);
231     } else {
232         egl_fb_destroy(&vc->gfx.cursor_fb);
233     }
234 #endif
235 }
236 
237 void gd_egl_cursor_position(DisplayChangeListener *dcl,
238                             uint32_t pos_x, uint32_t pos_y)
239 {
240     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
241 
242     vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
243     vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
244 }
245 
246 void gd_egl_release_dmabuf(DisplayChangeListener *dcl,
247                            QemuDmaBuf *dmabuf)
248 {
249 #ifdef CONFIG_OPENGL_DMABUF
250     egl_dmabuf_release_texture(dmabuf);
251 #endif
252 }
253 
254 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
255                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
256 {
257     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
258     GdkWindow *window;
259     int ww, wh;
260 
261     if (!vc->gfx.scanout_mode) {
262         return;
263     }
264     if (!vc->gfx.guest_fb.framebuffer) {
265         return;
266     }
267 
268     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
269                    vc->gfx.esurface, vc->gfx.ectx);
270 
271     window = gtk_widget_get_window(vc->gfx.drawing_area);
272     ww = gdk_window_get_width(window);
273     wh = gdk_window_get_height(window);
274     egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
275     if (vc->gfx.cursor_fb.texture) {
276         egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
277                          vc->gfx.y0_top);
278         egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
279                           vc->gfx.y0_top,
280                           vc->gfx.cursor_x, vc->gfx.cursor_y);
281     } else {
282         egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
283     }
284 
285     eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
286 }
287 
288 void gtk_egl_init(DisplayGLMode mode)
289 {
290     GdkDisplay *gdk_display = gdk_display_get_default();
291     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
292 
293     if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
294         return;
295     }
296 
297     display_opengl = 1;
298 }
299 
300 int gd_egl_make_current(DisplayChangeListener *dcl,
301                         QEMUGLContext ctx)
302 {
303     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
304 
305     return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
306                           vc->gfx.esurface, ctx);
307 }
308