xref: /openbmc/qemu/ui/gtk-gl-area.c (revision fa642680)
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 
gtk_gl_area_set_scanout_mode(VirtualConsole * vc,bool scanout)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 
gd_gl_area_draw(VirtualConsole * vc)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 (!qemu_dmabuf_get_draw_submitted(dmabuf)) {
64                 return;
65             } else {
66                 qemu_dmabuf_set_draw_submitted(dmabuf, 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             int fence_fd;
89             egl_dmabuf_create_fence(dmabuf);
90             fence_fd = qemu_dmabuf_get_fence_fd(dmabuf);
91             if (fence_fd >= 0) {
92                 qemu_set_fd_handler(fence_fd, gd_hw_gl_flushed, NULL, vc);
93                 return;
94             }
95             graphic_hw_gl_block(vc->gfx.dcl.con, false);
96         }
97 #endif
98     } else {
99         if (!vc->gfx.ds) {
100             return;
101         }
102         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
103 
104         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
105         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
106     }
107 }
108 
gd_gl_area_update(DisplayChangeListener * dcl,int x,int y,int w,int h)109 void gd_gl_area_update(DisplayChangeListener *dcl,
110                    int x, int y, int w, int h)
111 {
112     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
113 
114     if (!vc->gfx.gls || !vc->gfx.ds) {
115         return;
116     }
117 
118     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
119     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
120     vc->gfx.glupdates++;
121     gdk_gl_context_clear_current();
122 }
123 
gd_gl_area_refresh(DisplayChangeListener * dcl)124 void gd_gl_area_refresh(DisplayChangeListener *dcl)
125 {
126     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
127 
128     gd_update_monitor_refresh_rate(vc, vc->window ? vc->window : vc->gfx.drawing_area);
129 
130     if (vc->gfx.guest_fb.dmabuf &&
131         qemu_dmabuf_get_draw_submitted(vc->gfx.guest_fb.dmabuf)) {
132         gd_gl_area_draw(vc);
133         return;
134     }
135 
136     if (!vc->gfx.gls) {
137         if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
138             return;
139         }
140         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
141         vc->gfx.gls = qemu_gl_init_shader();
142         if (vc->gfx.ds) {
143             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
144         }
145     }
146 
147     graphic_hw_update(dcl->con);
148 
149     if (vc->gfx.glupdates) {
150         vc->gfx.glupdates = 0;
151         gtk_gl_area_set_scanout_mode(vc, false);
152         gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
153     }
154 }
155 
gd_gl_area_switch(DisplayChangeListener * dcl,DisplaySurface * surface)156 void gd_gl_area_switch(DisplayChangeListener *dcl,
157                        DisplaySurface *surface)
158 {
159     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
160     bool resized = true;
161 
162     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
163 
164     if (vc->gfx.ds &&
165         surface_width(vc->gfx.ds) == surface_width(surface) &&
166         surface_height(vc->gfx.ds) == surface_height(surface)) {
167         resized = false;
168     }
169 
170     if (vc->gfx.gls) {
171         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
172         surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
173         surface_gl_create_texture(vc->gfx.gls, surface);
174     }
175     vc->gfx.ds = surface;
176 
177     if (resized) {
178         gd_update_windowsize(vc);
179     }
180 }
181 
gd_cmp_gl_context_version(int major,int minor,QEMUGLParams * params)182 static int gd_cmp_gl_context_version(int major, int minor, QEMUGLParams *params)
183 {
184     if (major > params->major_ver) {
185         return 1;
186     }
187     if (major < params->major_ver) {
188         return -1;
189     }
190     if (minor > params->minor_ver) {
191         return 1;
192     }
193     if (minor < params->minor_ver) {
194         return -1;
195     }
196     return 0;
197 }
198 
gd_gl_area_create_context(DisplayGLCtx * dgc,QEMUGLParams * params)199 QEMUGLContext gd_gl_area_create_context(DisplayGLCtx *dgc,
200                                         QEMUGLParams *params)
201 {
202     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
203     GdkWindow *window;
204     GdkGLContext *ctx;
205     GError *err = NULL;
206     int major, minor;
207 
208     window = gtk_widget_get_window(vc->gfx.drawing_area);
209     ctx = gdk_window_create_gl_context(window, &err);
210     if (err) {
211         g_printerr("Create gdk gl context failed: %s\n", err->message);
212         g_error_free(err);
213         return NULL;
214     }
215     gdk_gl_context_set_required_version(ctx,
216                                         params->major_ver,
217                                         params->minor_ver);
218     gdk_gl_context_realize(ctx, &err);
219     if (err) {
220         g_printerr("Realize gdk gl context failed: %s\n", err->message);
221         g_error_free(err);
222         g_clear_object(&ctx);
223         return NULL;
224     }
225 
226     gdk_gl_context_make_current(ctx);
227     gdk_gl_context_get_version(ctx, &major, &minor);
228     gdk_gl_context_clear_current();
229     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
230 
231     if (gd_cmp_gl_context_version(major, minor, params) == -1) {
232         /* created ctx version < requested version */
233         g_clear_object(&ctx);
234     }
235 
236     trace_gd_gl_area_create_context(ctx, params->major_ver, params->minor_ver);
237     return ctx;
238 }
239 
gd_gl_area_destroy_context(DisplayGLCtx * dgc,QEMUGLContext ctx)240 void gd_gl_area_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx)
241 {
242     GdkGLContext *current_ctx = gdk_gl_context_get_current();
243 
244     trace_gd_gl_area_destroy_context(ctx, current_ctx);
245     if (ctx == current_ctx) {
246         gdk_gl_context_clear_current();
247     }
248     g_clear_object(&ctx);
249 }
250 
gd_gl_area_scanout_texture(DisplayChangeListener * dcl,uint32_t backing_id,bool backing_y_0_top,uint32_t backing_width,uint32_t backing_height,uint32_t x,uint32_t y,uint32_t w,uint32_t h,void * d3d_tex2d)251 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
252                                 uint32_t backing_id,
253                                 bool backing_y_0_top,
254                                 uint32_t backing_width,
255                                 uint32_t backing_height,
256                                 uint32_t x, uint32_t y,
257                                 uint32_t w, uint32_t h,
258                                 void *d3d_tex2d)
259 {
260     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
261 
262     vc->gfx.x = x;
263     vc->gfx.y = y;
264     vc->gfx.w = w;
265     vc->gfx.h = h;
266     vc->gfx.y0_top = backing_y_0_top;
267 
268     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
269 
270     if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
271         gtk_gl_area_set_scanout_mode(vc, false);
272         return;
273     }
274 
275     gtk_gl_area_set_scanout_mode(vc, true);
276     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
277                          backing_id, false);
278 }
279 
gd_gl_area_scanout_disable(DisplayChangeListener * dcl)280 void gd_gl_area_scanout_disable(DisplayChangeListener *dcl)
281 {
282     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
283 
284     gtk_gl_area_set_scanout_mode(vc, false);
285 }
286 
gd_gl_area_scanout_flush(DisplayChangeListener * dcl,uint32_t x,uint32_t y,uint32_t w,uint32_t h)287 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
288                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
289 {
290     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
291 
292     if (vc->gfx.guest_fb.dmabuf &&
293         !qemu_dmabuf_get_draw_submitted(vc->gfx.guest_fb.dmabuf)) {
294         graphic_hw_gl_block(vc->gfx.dcl.con, true);
295         qemu_dmabuf_set_draw_submitted(vc->gfx.guest_fb.dmabuf, true);
296         gtk_gl_area_set_scanout_mode(vc, true);
297     }
298     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
299 }
300 
gd_gl_area_scanout_dmabuf(DisplayChangeListener * dcl,QemuDmaBuf * dmabuf)301 void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
302                                QemuDmaBuf *dmabuf)
303 {
304 #ifdef CONFIG_GBM
305     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
306     uint32_t x, y, width, height, backing_width, backing_height, texture;
307     bool y0_top;
308 
309     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
310     egl_dmabuf_import_texture(dmabuf);
311     texture = qemu_dmabuf_get_texture(dmabuf);
312     if (!texture) {
313         return;
314     }
315 
316     x = qemu_dmabuf_get_x(dmabuf);
317     y = qemu_dmabuf_get_y(dmabuf);
318     width = qemu_dmabuf_get_width(dmabuf);
319     height = qemu_dmabuf_get_height(dmabuf);
320     backing_width = qemu_dmabuf_get_backing_width(dmabuf);
321     backing_height = qemu_dmabuf_get_backing_height(dmabuf);
322     y0_top = qemu_dmabuf_get_y0_top(dmabuf);
323 
324     gd_gl_area_scanout_texture(dcl, texture, y0_top,
325                                backing_width, backing_height,
326                                x, y, width, height, NULL);
327 
328     if (qemu_dmabuf_get_allow_fences(dmabuf)) {
329         vc->gfx.guest_fb.dmabuf = dmabuf;
330     }
331 #endif
332 }
333 
gtk_gl_area_init(void)334 void gtk_gl_area_init(void)
335 {
336     display_opengl = 1;
337 }
338 
gd_gl_area_make_current(DisplayGLCtx * dgc,QEMUGLContext ctx)339 int gd_gl_area_make_current(DisplayGLCtx *dgc,
340                             QEMUGLContext ctx)
341 {
342     gdk_gl_context_make_current(ctx);
343     return 0;
344 }
345