xref: /qemu/ui/gtk-gl-area.c (revision b21e2380) 
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 
106 void gd_gl_area_update(DisplayChangeListener *dcl,
107                    int x, int y, int w, int h)
108 {
109     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
110 
111     if (!vc->gfx.gls || !vc->gfx.ds) {
112         return;
113     }
114 
115     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
116     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
117     vc->gfx.glupdates++;
118 }
119 
120 void gd_gl_area_refresh(DisplayChangeListener *dcl)
121 {
122     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
123 
124     vc->gfx.dcl.update_interval = gd_monitor_update_interval(
125             vc->window ? vc->window : vc->gfx.drawing_area);
126 
127     if (!vc->gfx.gls) {
128         if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
129             return;
130         }
131         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
132         vc->gfx.gls = qemu_gl_init_shader();
133         if (vc->gfx.ds) {
134             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
135         }
136     }
137 
138     graphic_hw_update(dcl->con);
139 
140     if (vc->gfx.glupdates) {
141         vc->gfx.glupdates = 0;
142         gtk_gl_area_set_scanout_mode(vc, false);
143         gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
144     }
145 }
146 
147 void gd_gl_area_switch(DisplayChangeListener *dcl,
148                        DisplaySurface *surface)
149 {
150     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
151     bool resized = true;
152 
153     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
154 
155     if (vc->gfx.ds &&
156         surface_width(vc->gfx.ds) == surface_width(surface) &&
157         surface_height(vc->gfx.ds) == surface_height(surface)) {
158         resized = false;
159     }
160 
161     if (vc->gfx.gls) {
162         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
163         surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
164         surface_gl_create_texture(vc->gfx.gls, surface);
165     }
166     vc->gfx.ds = surface;
167 
168     if (resized) {
169         gd_update_windowsize(vc);
170     }
171 }
172 
173 QEMUGLContext gd_gl_area_create_context(DisplayGLCtx *dgc,
174                                         QEMUGLParams *params)
175 {
176     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
177     GdkWindow *window;
178     GdkGLContext *ctx;
179     GError *err = NULL;
180 
181     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
182     window = gtk_widget_get_window(vc->gfx.drawing_area);
183     ctx = gdk_window_create_gl_context(window, &err);
184     if (err) {
185         g_printerr("Create gdk gl context failed: %s\n", err->message);
186         g_error_free(err);
187         return NULL;
188     }
189     gdk_gl_context_set_required_version(ctx,
190                                         params->major_ver,
191                                         params->minor_ver);
192     gdk_gl_context_realize(ctx, &err);
193     if (err) {
194         g_printerr("Realize gdk gl context failed: %s\n", err->message);
195         g_error_free(err);
196         g_clear_object(&ctx);
197         return NULL;
198     }
199     return ctx;
200 }
201 
202 void gd_gl_area_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx)
203 {
204     /* FIXME */
205 }
206 
207 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
208                                 uint32_t backing_id,
209                                 bool backing_y_0_top,
210                                 uint32_t backing_width,
211                                 uint32_t backing_height,
212                                 uint32_t x, uint32_t y,
213                                 uint32_t w, uint32_t h)
214 {
215     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
216 
217     vc->gfx.x = x;
218     vc->gfx.y = y;
219     vc->gfx.w = w;
220     vc->gfx.h = h;
221     vc->gfx.y0_top = backing_y_0_top;
222 
223     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
224 
225     if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
226         gtk_gl_area_set_scanout_mode(vc, false);
227         return;
228     }
229 
230     gtk_gl_area_set_scanout_mode(vc, true);
231     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
232                          backing_id, false);
233 }
234 
235 void gd_gl_area_scanout_disable(DisplayChangeListener *dcl)
236 {
237     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
238 
239     gtk_gl_area_set_scanout_mode(vc, false);
240 }
241 
242 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
243                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
244 {
245     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
246 
247     if (vc->gfx.guest_fb.dmabuf) {
248         graphic_hw_gl_block(vc->gfx.dcl.con, true);
249         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
250     }
251     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
252 }
253 
254 void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
255                                QemuDmaBuf *dmabuf)
256 {
257 #ifdef CONFIG_GBM
258     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
259 
260     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
261     egl_dmabuf_import_texture(dmabuf);
262     if (!dmabuf->texture) {
263         return;
264     }
265 
266     gd_gl_area_scanout_texture(dcl, dmabuf->texture,
267                                false, dmabuf->width, dmabuf->height,
268                                0, 0, dmabuf->width, dmabuf->height);
269 
270     if (dmabuf->allow_fences) {
271         vc->gfx.guest_fb.dmabuf = dmabuf;
272     }
273 #endif
274 }
275 
276 void gtk_gl_area_init(void)
277 {
278     display_opengl = 1;
279 }
280 
281 int gd_gl_area_make_current(DisplayGLCtx *dgc,
282                             QEMUGLContext ctx)
283 {
284     gdk_gl_context_make_current(ctx);
285     return 0;
286 }
287