xref: /qemu/ui/gtk-gl-area.c (revision 727385c4) 
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, 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     ww = gtk_widget_get_allocated_width(vc->gfx.drawing_area);
52     wh = gtk_widget_get_allocated_height(vc->gfx.drawing_area);
53 
54     if (vc->gfx.scanout_mode) {
55         if (!vc->gfx.guest_fb.framebuffer) {
56             return;
57         }
58 
59 #ifdef CONFIG_GBM
60         if (dmabuf) {
61             if (!dmabuf->draw_submitted) {
62                 return;
63             } else {
64                 dmabuf->draw_submitted = false;
65             }
66         }
67 #endif
68 
69         glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.guest_fb.framebuffer);
70         /* GtkGLArea sets GL_DRAW_FRAMEBUFFER for us */
71 
72         glViewport(0, 0, ww, wh);
73         y1 = vc->gfx.y0_top ? 0 : vc->gfx.h;
74         y2 = vc->gfx.y0_top ? vc->gfx.h : 0;
75         glBlitFramebuffer(0, y1, vc->gfx.w, y2,
76                           0, 0, ww, wh,
77                           GL_COLOR_BUFFER_BIT, GL_NEAREST);
78 #ifdef CONFIG_GBM
79         if (dmabuf) {
80             egl_dmabuf_create_sync(dmabuf);
81         }
82 #endif
83         glFlush();
84 #ifdef CONFIG_GBM
85         if (dmabuf) {
86             egl_dmabuf_create_fence(dmabuf);
87             if (dmabuf->fence_fd > 0) {
88                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
89                 return;
90             }
91             graphic_hw_gl_block(vc->gfx.dcl.con, false);
92         }
93 #endif
94     } else {
95         if (!vc->gfx.ds) {
96             return;
97         }
98         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
99 
100         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
101         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
102     }
103 
104     graphic_hw_gl_flushed(vc->gfx.dcl.con);
105 }
106 
107 void gd_gl_area_update(DisplayChangeListener *dcl,
108                    int x, int y, int w, int h)
109 {
110     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
111 
112     if (!vc->gfx.gls || !vc->gfx.ds) {
113         return;
114     }
115 
116     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
117     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
118     vc->gfx.glupdates++;
119 }
120 
121 void gd_gl_area_refresh(DisplayChangeListener *dcl)
122 {
123     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
124 
125     vc->gfx.dcl.update_interval = gd_monitor_update_interval(
126             vc->window ? vc->window : vc->gfx.drawing_area);
127 
128     if (!vc->gfx.gls) {
129         if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
130             return;
131         }
132         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
133         vc->gfx.gls = qemu_gl_init_shader();
134         if (vc->gfx.ds) {
135             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
136         }
137     }
138 
139     graphic_hw_update(dcl->con);
140 
141     if (vc->gfx.glupdates) {
142         vc->gfx.glupdates = 0;
143         gtk_gl_area_set_scanout_mode(vc, false);
144         gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
145     }
146 }
147 
148 void gd_gl_area_switch(DisplayChangeListener *dcl,
149                        DisplaySurface *surface)
150 {
151     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
152     bool resized = true;
153 
154     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
155 
156     if (vc->gfx.ds &&
157         surface_width(vc->gfx.ds) == surface_width(surface) &&
158         surface_height(vc->gfx.ds) == surface_height(surface)) {
159         resized = false;
160     }
161 
162     if (vc->gfx.gls) {
163         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
164         surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
165         surface_gl_create_texture(vc->gfx.gls, surface);
166     }
167     vc->gfx.ds = surface;
168 
169     if (resized) {
170         gd_update_windowsize(vc);
171     }
172 }
173 
174 QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl,
175                                         QEMUGLParams *params)
176 {
177     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
178     GdkWindow *window;
179     GdkGLContext *ctx;
180     GError *err = NULL;
181 
182     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
183     window = gtk_widget_get_window(vc->gfx.drawing_area);
184     ctx = gdk_window_create_gl_context(window, &err);
185     if (err) {
186         g_printerr("Create gdk gl context failed: %s\n", err->message);
187         g_error_free(err);
188         return NULL;
189     }
190     gdk_gl_context_set_required_version(ctx,
191                                         params->major_ver,
192                                         params->minor_ver);
193     gdk_gl_context_realize(ctx, &err);
194     if (err) {
195         g_printerr("Realize gdk gl context failed: %s\n", err->message);
196         g_error_free(err);
197         g_clear_object(&ctx);
198         return NULL;
199     }
200     return ctx;
201 }
202 
203 void gd_gl_area_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
204 {
205     /* FIXME */
206 }
207 
208 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
209                                 uint32_t backing_id,
210                                 bool backing_y_0_top,
211                                 uint32_t backing_width,
212                                 uint32_t backing_height,
213                                 uint32_t x, uint32_t y,
214                                 uint32_t w, uint32_t h)
215 {
216     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
217 
218     vc->gfx.x = x;
219     vc->gfx.y = y;
220     vc->gfx.w = w;
221     vc->gfx.h = h;
222     vc->gfx.y0_top = backing_y_0_top;
223 
224     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
225 
226     if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
227         gtk_gl_area_set_scanout_mode(vc, false);
228         return;
229     }
230 
231     gtk_gl_area_set_scanout_mode(vc, true);
232     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
233                          backing_id, false);
234 }
235 
236 void gd_gl_area_scanout_disable(DisplayChangeListener *dcl)
237 {
238     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
239 
240     gtk_gl_area_set_scanout_mode(vc, false);
241 }
242 
243 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
244                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
245 {
246     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
247 
248     if (vc->gfx.guest_fb.dmabuf) {
249         graphic_hw_gl_block(vc->gfx.dcl.con, true);
250         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
251     }
252     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
253 }
254 
255 void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
256                                QemuDmaBuf *dmabuf)
257 {
258 #ifdef CONFIG_GBM
259     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
260 
261     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
262     egl_dmabuf_import_texture(dmabuf);
263     if (!dmabuf->texture) {
264         return;
265     }
266 
267     gd_gl_area_scanout_texture(dcl, dmabuf->texture,
268                                false, dmabuf->width, dmabuf->height,
269                                0, 0, dmabuf->width, dmabuf->height);
270 
271     if (dmabuf->allow_fences) {
272         vc->gfx.guest_fb.dmabuf = dmabuf;
273     }
274 #endif
275 }
276 
277 void gtk_gl_area_init(void)
278 {
279     display_opengl = 1;
280 }
281 
282 int gd_gl_area_make_current(DisplayChangeListener *dcl,
283                             QEMUGLContext ctx)
284 {
285     gdk_gl_context_make_current(ctx);
286     return 0;
287 }
288