ui/gtk-gl-area.c

   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 }