Merge remote-tracking branch 'remotes/kraxel/tags/pull-vga-20170103-1' into staging
[qemu.git] / ui / gtk-egl.c
1 /*
2 * GTK UI -- egl opengl code.
3 *
4 * Note that gtk 3.16+ (released 2015-03-23) has a GtkGLArea widget,
5 * which is GtkDrawingArea like widget with opengl rendering support.
6 *
7 * This code handles opengl support on older gtk versions, using egl
8 * to get a opengl context for the X11 window.
9 *
10 * This work is licensed under the terms of the GNU GPL, version 2 or later.
11 * See the COPYING file in the top-level directory.
12 */
13
14 #include "qemu/osdep.h"
15 #include "qemu-common.h"
16
17 #include "trace.h"
18
19 #include "ui/console.h"
20 #include "ui/gtk.h"
21 #include "ui/egl-helpers.h"
22
23 #include "sysemu/sysemu.h"
24
25 static void gtk_egl_set_scanout_mode(VirtualConsole *vc, bool scanout)
26 {
27 if (vc->gfx.scanout_mode == scanout) {
28 return;
29 }
30
31 vc->gfx.scanout_mode = scanout;
32 if (!vc->gfx.scanout_mode) {
33 if (vc->gfx.fbo_id) {
34 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
35 GL_COLOR_ATTACHMENT0_EXT,
36 GL_TEXTURE_2D, 0, 0);
37 glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
38 glDeleteFramebuffers(1, &vc->gfx.fbo_id);
39 vc->gfx.fbo_id = 0;
40 }
41 if (vc->gfx.surface) {
42 surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
43 surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
44 }
45 }
46 }
47
48 /** DisplayState Callbacks (opengl version) **/
49
50 void gd_egl_init(VirtualConsole *vc)
51 {
52 GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
53 if (!gdk_window) {
54 return;
55 }
56
57 #if GTK_CHECK_VERSION(3, 0, 0)
58 Window x11_window = gdk_x11_window_get_xid(gdk_window);
59 #else
60 Window x11_window = gdk_x11_drawable_get_xid(gdk_window);
61 #endif
62 if (!x11_window) {
63 return;
64 }
65
66 vc->gfx.ectx = qemu_egl_init_ctx();
67 vc->gfx.esurface = qemu_egl_init_surface_x11(vc->gfx.ectx, x11_window);
68
69 assert(vc->gfx.esurface);
70 }
71
72 void gd_egl_draw(VirtualConsole *vc)
73 {
74 GdkWindow *window;
75 int ww, wh;
76
77 if (!vc->gfx.gls) {
78 return;
79 }
80
81 if (vc->gfx.scanout_mode) {
82 gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
83 } else {
84 if (!vc->gfx.ds) {
85 return;
86 }
87 eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
88 vc->gfx.esurface, vc->gfx.ectx);
89
90 window = gtk_widget_get_window(vc->gfx.drawing_area);
91 gdk_drawable_get_size(window, &ww, &wh);
92 surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
93 surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
94
95 eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
96 }
97 }
98
99 void gd_egl_update(DisplayChangeListener *dcl,
100 int x, int y, int w, int h)
101 {
102 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
103
104 if (!vc->gfx.gls || !vc->gfx.ds) {
105 return;
106 }
107
108 eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
109 vc->gfx.esurface, vc->gfx.ectx);
110 surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
111 vc->gfx.glupdates++;
112 }
113
114 void gd_egl_refresh(DisplayChangeListener *dcl)
115 {
116 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
117
118 if (!vc->gfx.esurface) {
119 gd_egl_init(vc);
120 if (!vc->gfx.esurface) {
121 return;
122 }
123 vc->gfx.gls = console_gl_init_context();
124 if (vc->gfx.ds) {
125 surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
126 }
127 }
128
129 graphic_hw_update(dcl->con);
130
131 if (vc->gfx.glupdates) {
132 vc->gfx.glupdates = 0;
133 gtk_egl_set_scanout_mode(vc, false);
134 gd_egl_draw(vc);
135 }
136 }
137
138 void gd_egl_switch(DisplayChangeListener *dcl,
139 DisplaySurface *surface)
140 {
141 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
142 bool resized = true;
143
144 trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
145
146 if (vc->gfx.ds &&
147 surface_width(vc->gfx.ds) == surface_width(surface) &&
148 surface_height(vc->gfx.ds) == surface_height(surface)) {
149 resized = false;
150 }
151
152 surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
153 vc->gfx.ds = surface;
154 if (vc->gfx.gls) {
155 surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
156 }
157
158 if (resized) {
159 gd_update_windowsize(vc);
160 }
161 }
162
163 QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
164 QEMUGLParams *params)
165 {
166 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
167
168 eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
169 vc->gfx.esurface, vc->gfx.ectx);
170 return qemu_egl_create_context(dcl, params);
171 }
172
173 void gd_egl_scanout(DisplayChangeListener *dcl,
174 uint32_t backing_id, bool backing_y_0_top,
175 uint32_t backing_width, uint32_t backing_height,
176 uint32_t x, uint32_t y,
177 uint32_t w, uint32_t h)
178 {
179 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
180
181 vc->gfx.x = x;
182 vc->gfx.y = y;
183 vc->gfx.w = w;
184 vc->gfx.h = h;
185 vc->gfx.tex_id = backing_id;
186 vc->gfx.y0_top = backing_y_0_top;
187
188 eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
189 vc->gfx.esurface, vc->gfx.ectx);
190
191 if (vc->gfx.tex_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
192 gtk_egl_set_scanout_mode(vc, false);
193 return;
194 }
195
196 gtk_egl_set_scanout_mode(vc, true);
197 if (!vc->gfx.fbo_id) {
198 glGenFramebuffers(1, &vc->gfx.fbo_id);
199 }
200
201 glBindFramebuffer(GL_FRAMEBUFFER_EXT, vc->gfx.fbo_id);
202 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
203 GL_TEXTURE_2D, vc->gfx.tex_id, 0);
204 }
205
206 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
207 uint32_t x, uint32_t y, uint32_t w, uint32_t h)
208 {
209 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
210 GdkWindow *window;
211 int ww, wh, y1, y2;
212
213 if (!vc->gfx.scanout_mode) {
214 return;
215 }
216 if (!vc->gfx.fbo_id) {
217 return;
218 }
219
220 eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
221 vc->gfx.esurface, vc->gfx.ectx);
222
223 glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.fbo_id);
224 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
225
226 window = gtk_widget_get_window(vc->gfx.drawing_area);
227 gdk_drawable_get_size(window, &ww, &wh);
228 glViewport(0, 0, ww, wh);
229 y1 = vc->gfx.y0_top ? 0 : vc->gfx.h;
230 y2 = vc->gfx.y0_top ? vc->gfx.h : 0;
231 glBlitFramebuffer(0, y1, vc->gfx.w, y2,
232 0, 0, ww, wh,
233 GL_COLOR_BUFFER_BIT, GL_NEAREST);
234 glBindFramebuffer(GL_FRAMEBUFFER_EXT, vc->gfx.fbo_id);
235
236 eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
237 }
238
239 void gtk_egl_init(void)
240 {
241 GdkDisplay *gdk_display = gdk_display_get_default();
242 Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
243
244 if (qemu_egl_init_dpy(x11_display, false, false) < 0) {
245 return;
246 }
247
248 display_opengl = 1;
249 }
250
251 int gd_egl_make_current(DisplayChangeListener *dcl,
252 QEMUGLContext ctx)
253 {
254 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
255
256 return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
257 vc->gfx.esurface, ctx);
258 }