xref: /openbmc/qemu/ui/gtk-gl-area.c (revision bc3e41a0) 
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         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
30         egl_fb_destroy(&vc->gfx.guest_fb);
31         if (vc->gfx.surface) {
32             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
33             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
34         }
35     }
36 }
37 
38 /** DisplayState Callbacks (opengl version) **/
39 
40 void gd_gl_area_draw(VirtualConsole *vc)
41 {
42 #ifdef CONFIG_GBM
43     QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
44 #endif
45     int ww, wh, ws, y1, y2;
46 
47     if (!vc->gfx.gls) {
48         return;
49     }
50 
51     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
52     ws = gdk_window_get_scale_factor(gtk_widget_get_window(vc->gfx.drawing_area));
53     ww = gtk_widget_get_allocated_width(vc->gfx.drawing_area) * ws;
54     wh = gtk_widget_get_allocated_height(vc->gfx.drawing_area) * ws;
55 
56     if (vc->gfx.scanout_mode) {
57         if (!vc->gfx.guest_fb.framebuffer) {
58             return;
59         }
60 
61 #ifdef CONFIG_GBM
62         if (dmabuf) {
63             if (!dmabuf->draw_submitted) {
64                 return;
65             } else {
66                 dmabuf->draw_submitted = false;
67             }
68         }
69 #endif
70 
71         glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.guest_fb.framebuffer);
72         /* GtkGLArea sets GL_DRAW_FRAMEBUFFER for us */
73 
74         glViewport(0, 0, ww, wh);
75         y1 = vc->gfx.y0_top ? 0 : vc->gfx.h;
76         y2 = vc->gfx.y0_top ? vc->gfx.h : 0;
77         glBlitFramebuffer(0, y1, vc->gfx.w, y2,
78                           0, 0, ww, wh,
79                           GL_COLOR_BUFFER_BIT, GL_NEAREST);
80 #ifdef CONFIG_GBM
81         if (dmabuf) {
82             egl_dmabuf_create_sync(dmabuf);
83         }
84 #endif
85         glFlush();
86 #ifdef CONFIG_GBM
87         if (dmabuf) {
88             egl_dmabuf_create_fence(dmabuf);
89             if (dmabuf->fence_fd > 0) {
90                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
91                 return;
92             }
93             graphic_hw_gl_block(vc->gfx.dcl.con, false);
94         }
95 #endif
96     } else {
97         if (!vc->gfx.ds) {
98             return;
99         }
100         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
101 
102         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
103         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
104     }
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     gdk_gl_context_clear_current();
120 }
121 
122 void gd_gl_area_refresh(DisplayChangeListener *dcl)
123 {
124     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
125 
126     gd_update_monitor_refresh_rate(vc, vc->window ? vc->window : vc->gfx.drawing_area);
127 
128     if (vc->gfx.guest_fb.dmabuf && vc->gfx.guest_fb.dmabuf->draw_submitted) {
129         return;
130     }
131 
132     if (!vc->gfx.gls) {
133         if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
134             return;
135         }
136         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
137         vc->gfx.gls = qemu_gl_init_shader();
138         if (vc->gfx.ds) {
139             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
140         }
141     }
142 
143     graphic_hw_update(dcl->con);
144 
145     if (vc->gfx.glupdates) {
146         vc->gfx.glupdates = 0;
147         gtk_gl_area_set_scanout_mode(vc, false);
148         gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
149     }
150 }
151 
152 void gd_gl_area_switch(DisplayChangeListener *dcl,
153                        DisplaySurface *surface)
154 {
155     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
156     bool resized = true;
157 
158     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
159 
160     if (vc->gfx.ds &&
161         surface_width(vc->gfx.ds) == surface_width(surface) &&
162         surface_height(vc->gfx.ds) == surface_height(surface)) {
163         resized = false;
164     }
165 
166     if (vc->gfx.gls) {
167         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
168         surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
169         surface_gl_create_texture(vc->gfx.gls, surface);
170     }
171     vc->gfx.ds = surface;
172 
173     if (resized) {
174         gd_update_windowsize(vc);
175     }
176 }
177 
178 static int gd_cmp_gl_context_version(int major, int minor, QEMUGLParams *params)
179 {
180     if (major > params->major_ver) {
181         return 1;
182     }
183     if (major < params->major_ver) {
184         return -1;
185     }
186     if (minor > params->minor_ver) {
187         return 1;
188     }
189     if (minor < params->minor_ver) {
190         return -1;
191     }
192     return 0;
193 }
194 
195 QEMUGLContext gd_gl_area_create_context(DisplayGLCtx *dgc,
196                                         QEMUGLParams *params)
197 {
198     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
199     GdkWindow *window;
200     GdkGLContext *ctx;
201     GError *err = NULL;
202     int major, minor;
203 
204     window = gtk_widget_get_window(vc->gfx.drawing_area);
205     ctx = gdk_window_create_gl_context(window, &err);
206     if (err) {
207         g_printerr("Create gdk gl context failed: %s\n", err->message);
208         g_error_free(err);
209         return NULL;
210     }
211     gdk_gl_context_set_required_version(ctx,
212                                         params->major_ver,
213                                         params->minor_ver);
214     gdk_gl_context_realize(ctx, &err);
215     if (err) {
216         g_printerr("Realize gdk gl context failed: %s\n", err->message);
217         g_error_free(err);
218         g_clear_object(&ctx);
219         return NULL;
220     }
221 
222     gdk_gl_context_make_current(ctx);
223     gdk_gl_context_get_version(ctx, &major, &minor);
224     gdk_gl_context_clear_current();
225     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
226 
227     if (gd_cmp_gl_context_version(major, minor, params) == -1) {
228         /* created ctx version < requested version */
229         g_clear_object(&ctx);
230     }
231 
232     trace_gd_gl_area_create_context(ctx, params->major_ver, params->minor_ver);
233     return ctx;
234 }
235 
236 void gd_gl_area_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx)
237 {
238     GdkGLContext *current_ctx = gdk_gl_context_get_current();
239 
240     trace_gd_gl_area_destroy_context(ctx, current_ctx);
241     if (ctx == current_ctx) {
242         gdk_gl_context_clear_current();
243     }
244     g_clear_object(&ctx);
245 }
246 
247 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
248                                 uint32_t backing_id,
249                                 bool backing_y_0_top,
250                                 uint32_t backing_width,
251                                 uint32_t backing_height,
252                                 uint32_t x, uint32_t y,
253                                 uint32_t w, uint32_t h,
254                                 void *d3d_tex2d)
255 {
256     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
257 
258     vc->gfx.x = x;
259     vc->gfx.y = y;
260     vc->gfx.w = w;
261     vc->gfx.h = h;
262     vc->gfx.y0_top = backing_y_0_top;
263 
264     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
265 
266     if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
267         gtk_gl_area_set_scanout_mode(vc, false);
268         return;
269     }
270 
271     gtk_gl_area_set_scanout_mode(vc, true);
272     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
273                          backing_id, false);
274 }
275 
276 void gd_gl_area_scanout_disable(DisplayChangeListener *dcl)
277 {
278     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
279 
280     gtk_gl_area_set_scanout_mode(vc, false);
281 }
282 
283 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
284                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
285 {
286     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
287 
288     if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) {
289         graphic_hw_gl_block(vc->gfx.dcl.con, true);
290         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
291         gtk_gl_area_set_scanout_mode(vc, true);
292     }
293     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
294 }
295 
296 void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
297                                QemuDmaBuf *dmabuf)
298 {
299 #ifdef CONFIG_GBM
300     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
301 
302     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
303     egl_dmabuf_import_texture(dmabuf);
304     if (!dmabuf->texture) {
305         return;
306     }
307 
308     gd_gl_area_scanout_texture(dcl, dmabuf->texture,
309                                dmabuf->y0_top,
310                                dmabuf->backing_width, dmabuf->backing_height,
311                                dmabuf->x, dmabuf->y, dmabuf->width,
312                                dmabuf->height, NULL);
313 
314     if (dmabuf->allow_fences) {
315         vc->gfx.guest_fb.dmabuf = dmabuf;
316     }
317 #endif
318 }
319 
320 void gtk_gl_area_init(void)
321 {
322     display_opengl = 1;
323 }
324 
325 int gd_gl_area_make_current(DisplayGLCtx *dgc,
326                             QEMUGLContext ctx)
327 {
328     gdk_gl_context_make_current(ctx);
329     return 0;
330 }
331