xref: /qemu/ui/gtk-gl-area.c (revision 0de89a86) 
1 /*
2  * GTK UI -- glarea opengl code.
3  *
4  * Requires 3.16+ (GtkGLArea widget).
5  *
6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
7  * See the COPYING file in the top-level directory.
8  */
9 
10 #include "qemu/osdep.h"
11 #include "qemu/main-loop.h"
12 
13 #include "trace.h"
14 
15 #include "ui/console.h"
16 #include "ui/gtk.h"
17 #include "ui/egl-helpers.h"
18 
19 #include "sysemu/sysemu.h"
20 
21 static void gtk_gl_area_set_scanout_mode(VirtualConsole *vc, bool scanout)
22 {
23     if (vc->gfx.scanout_mode == scanout) {
24         return;
25     }
26 
27     vc->gfx.scanout_mode = scanout;
28     if (!vc->gfx.scanout_mode) {
29         egl_fb_destroy(&vc->gfx.guest_fb);
30         if (vc->gfx.surface) {
31             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
32             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
33         }
34     }
35 }
36 
37 /** DisplayState Callbacks (opengl version) **/
38 
39 void gd_gl_area_draw(VirtualConsole *vc)
40 {
41 #ifdef CONFIG_GBM
42     QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
43 #endif
44     int ww, wh, ws, y1, y2;
45 
46     if (!vc->gfx.gls) {
47         return;
48     }
49 
50     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
51     ws = gdk_window_get_scale_factor(gtk_widget_get_window(vc->gfx.drawing_area));
52     ww = gtk_widget_get_allocated_width(vc->gfx.drawing_area) * ws;
53     wh = gtk_widget_get_allocated_height(vc->gfx.drawing_area) * ws;
54 
55     if (vc->gfx.scanout_mode) {
56         if (!vc->gfx.guest_fb.framebuffer) {
57             return;
58         }
59 
60 #ifdef CONFIG_GBM
61         if (dmabuf) {
62             if (!dmabuf->draw_submitted) {
63                 return;
64             } else {
65                 dmabuf->draw_submitted = false;
66             }
67         }
68 #endif
69 
70         glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.guest_fb.framebuffer);
71         /* GtkGLArea sets GL_DRAW_FRAMEBUFFER for us */
72 
73         glViewport(0, 0, ww, wh);
74         y1 = vc->gfx.y0_top ? 0 : vc->gfx.h;
75         y2 = vc->gfx.y0_top ? vc->gfx.h : 0;
76         glBlitFramebuffer(0, y1, vc->gfx.w, y2,
77                           0, 0, ww, wh,
78                           GL_COLOR_BUFFER_BIT, GL_NEAREST);
79 #ifdef CONFIG_GBM
80         if (dmabuf) {
81             egl_dmabuf_create_sync(dmabuf);
82         }
83 #endif
84         glFlush();
85 #ifdef CONFIG_GBM
86         if (dmabuf) {
87             egl_dmabuf_create_fence(dmabuf);
88             if (dmabuf->fence_fd > 0) {
89                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
90                 return;
91             }
92             graphic_hw_gl_block(vc->gfx.dcl.con, false);
93         }
94 #endif
95     } else {
96         if (!vc->gfx.ds) {
97             return;
98         }
99         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
100 
101         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
102         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
103     }
104 
105     graphic_hw_gl_flushed(vc->gfx.dcl.con);
106 }
107 
108 void gd_gl_area_update(DisplayChangeListener *dcl,
109                    int x, int y, int w, int h)
110 {
111     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
112 
113     if (!vc->gfx.gls || !vc->gfx.ds) {
114         return;
115     }
116 
117     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
118     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
119     vc->gfx.glupdates++;
120 }
121 
122 void gd_gl_area_refresh(DisplayChangeListener *dcl)
123 {
124     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
125 
126     vc->gfx.dcl.update_interval = gd_monitor_update_interval(
127             vc->window ? vc->window : vc->gfx.drawing_area);
128 
129     if (!vc->gfx.gls) {
130         if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
131             return;
132         }
133         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
134         vc->gfx.gls = qemu_gl_init_shader();
135         if (vc->gfx.ds) {
136             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
137         }
138     }
139 
140     graphic_hw_update(dcl->con);
141 
142     if (vc->gfx.glupdates) {
143         vc->gfx.glupdates = 0;
144         gtk_gl_area_set_scanout_mode(vc, false);
145         gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
146     }
147 }
148 
149 void gd_gl_area_switch(DisplayChangeListener *dcl,
150                        DisplaySurface *surface)
151 {
152     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
153     bool resized = true;
154 
155     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
156 
157     if (vc->gfx.ds &&
158         surface_width(vc->gfx.ds) == surface_width(surface) &&
159         surface_height(vc->gfx.ds) == surface_height(surface)) {
160         resized = false;
161     }
162 
163     if (vc->gfx.gls) {
164         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
165         surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
166         surface_gl_create_texture(vc->gfx.gls, surface);
167     }
168     vc->gfx.ds = surface;
169 
170     if (resized) {
171         gd_update_windowsize(vc);
172     }
173 }
174 
175 QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl,
176                                         QEMUGLParams *params)
177 {
178     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
179     GdkWindow *window;
180     GdkGLContext *ctx;
181     GError *err = NULL;
182 
183     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
184     window = gtk_widget_get_window(vc->gfx.drawing_area);
185     ctx = gdk_window_create_gl_context(window, &err);
186     if (err) {
187         g_printerr("Create gdk gl context failed: %s\n", err->message);
188         g_error_free(err);
189         return NULL;
190     }
191     gdk_gl_context_set_required_version(ctx,
192                                         params->major_ver,
193                                         params->minor_ver);
194     gdk_gl_context_realize(ctx, &err);
195     if (err) {
196         g_printerr("Realize gdk gl context failed: %s\n", err->message);
197         g_error_free(err);
198         g_clear_object(&ctx);
199         return NULL;
200     }
201     return ctx;
202 }
203 
204 void gd_gl_area_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
205 {
206     /* FIXME */
207 }
208 
209 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
210                                 uint32_t backing_id,
211                                 bool backing_y_0_top,
212                                 uint32_t backing_width,
213                                 uint32_t backing_height,
214                                 uint32_t x, uint32_t y,
215                                 uint32_t w, uint32_t h)
216 {
217     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
218 
219     vc->gfx.x = x;
220     vc->gfx.y = y;
221     vc->gfx.w = w;
222     vc->gfx.h = h;
223     vc->gfx.y0_top = backing_y_0_top;
224 
225     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
226 
227     if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
228         gtk_gl_area_set_scanout_mode(vc, false);
229         return;
230     }
231 
232     gtk_gl_area_set_scanout_mode(vc, true);
233     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
234                          backing_id, false);
235 }
236 
237 void gd_gl_area_scanout_disable(DisplayChangeListener *dcl)
238 {
239     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
240 
241     gtk_gl_area_set_scanout_mode(vc, false);
242 }
243 
244 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
245                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
246 {
247     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
248 
249     if (vc->gfx.guest_fb.dmabuf) {
250         graphic_hw_gl_block(vc->gfx.dcl.con, true);
251         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
252     }
253     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
254 }
255 
256 void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
257                                QemuDmaBuf *dmabuf)
258 {
259 #ifdef CONFIG_GBM
260     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
261 
262     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
263     egl_dmabuf_import_texture(dmabuf);
264     if (!dmabuf->texture) {
265         return;
266     }
267 
268     gd_gl_area_scanout_texture(dcl, dmabuf->texture,
269                                false, dmabuf->width, dmabuf->height,
270                                0, 0, dmabuf->width, dmabuf->height);
271 
272     if (dmabuf->allow_fences) {
273         vc->gfx.guest_fb.dmabuf = dmabuf;
274     }
275 #endif
276 }
277 
278 void gtk_gl_area_init(void)
279 {
280     display_opengl = 1;
281 }
282 
283 int gd_gl_area_make_current(DisplayChangeListener *dcl,
284                             QEMUGLContext ctx)
285 {
286     gdk_gl_context_make_current(ctx);
287     return 0;
288 }
289