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, 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     graphic_hw_gl_flushed(vc->gfx.dcl.con);
 106 }
 107
 108 void gd_gl_area_update(DisplayChangeListener *dcl,
 109                    int x, int y, int w, int h)
 110 {
 111     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 112
 113     if (!vc->gfx.gls || !vc->gfx.ds) {
 114         return;
 115     }
 116
 117     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 118     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 119     vc->gfx.glupdates++;
 120 }
 121
 122 void gd_gl_area_refresh(DisplayChangeListener *dcl)
 123 {
 124     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 125
 126     vc->gfx.dcl.update_interval = gd_monitor_update_interval(
 127             vc->window ? vc->window : vc->gfx.drawing_area);
 128
 129     if (!vc->gfx.gls) {
 130         if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
 131             return;
 132         }
 133         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 134         vc->gfx.gls = qemu_gl_init_shader();
 135         if (vc->gfx.ds) {
 136             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 137         }
 138     }
 139
 140     graphic_hw_update(dcl->con);
 141
 142     if (vc->gfx.glupdates) {
 143         vc->gfx.glupdates = 0;
 144         gtk_gl_area_set_scanout_mode(vc, false);
 145         gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
 146     }
 147 }
 148
 149 void gd_gl_area_switch(DisplayChangeListener *dcl,
 150                        DisplaySurface *surface)
 151 {
 152     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 153     bool resized = true;
 154
 155     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 156
 157     if (vc->gfx.ds &&
 158         surface_width(vc->gfx.ds) == surface_width(surface) &&
 159         surface_height(vc->gfx.ds) == surface_height(surface)) {
 160         resized = false;
 161     }
 162
 163     if (vc->gfx.gls) {
 164         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 165         surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 166         surface_gl_create_texture(vc->gfx.gls, surface);
 167     }
 168     vc->gfx.ds = surface;
 169
 170     if (resized) {
 171         gd_update_windowsize(vc);
 172     }
 173 }
 174
 175 QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl,
 176                                         QEMUGLParams *params)
 177 {
 178     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 179     GdkWindow *window;
 180     GdkGLContext *ctx;
 181     GError *err = NULL;
 182
 183     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 184     window = gtk_widget_get_window(vc->gfx.drawing_area);
 185     ctx = gdk_window_create_gl_context(window, &err);
 186     if (err) {
 187         g_printerr("Create gdk gl context failed: %s\n", err->message);
 188         g_error_free(err);
 189         return NULL;
 190     }
 191     gdk_gl_context_set_required_version(ctx,
 192                                         params->major_ver,
 193                                         params->minor_ver);
 194     gdk_gl_context_realize(ctx, &err);
 195     if (err) {
 196         g_printerr("Realize gdk gl context failed: %s\n", err->message);
 197         g_error_free(err);
 198         g_clear_object(&ctx);
 199         return NULL;
 200     }
 201     return ctx;
 202 }
 203
 204 void gd_gl_area_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
 205 {
 206     /* FIXME */
 207 }
 208
 209 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
 210                                 uint32_t backing_id,
 211                                 bool backing_y_0_top,
 212                                 uint32_t backing_width,
 213                                 uint32_t backing_height,
 214                                 uint32_t x, uint32_t y,
 215                                 uint32_t w, uint32_t h)
 216 {
 217     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 218
 219     vc->gfx.x = x;
 220     vc->gfx.y = y;
 221     vc->gfx.w = w;
 222     vc->gfx.h = h;
 223     vc->gfx.y0_top = backing_y_0_top;
 224
 225     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 226
 227     if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
 228         gtk_gl_area_set_scanout_mode(vc, false);
 229         return;
 230     }
 231
 232     gtk_gl_area_set_scanout_mode(vc, true);
 233     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 234                          backing_id, false);
 235 }
 236
 237 void gd_gl_area_scanout_disable(DisplayChangeListener *dcl)
 238 {
 239     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 240
 241     gtk_gl_area_set_scanout_mode(vc, false);
 242 }
 243
 244 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
 245                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 246 {
 247     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 248
 249     if (vc->gfx.guest_fb.dmabuf) {
 250         graphic_hw_gl_block(vc->gfx.dcl.con, true);
 251         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
 252     }
 253     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
 254 }
 255
 256 void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
 257                                QemuDmaBuf *dmabuf)
 258 {
 259 #ifdef CONFIG_GBM
 260     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 261
 262     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 263     egl_dmabuf_import_texture(dmabuf);
 264     if (!dmabuf->texture) {
 265         return;
 266     }
 267
 268     gd_gl_area_scanout_texture(dcl, dmabuf->texture,
 269                                false, dmabuf->width, dmabuf->height,
 270                                0, 0, dmabuf->width, dmabuf->height);
 271
 272     if (dmabuf->allow_fences) {
 273         vc->gfx.guest_fb.dmabuf = dmabuf;
 274     }
 275 #endif
 276 }
 277
 278 void gtk_gl_area_init(void)
 279 {
 280     display_opengl = 1;
 281 }
 282
 283 int gd_gl_area_make_current(DisplayChangeListener *dcl,
 284                             QEMUGLContext ctx)
 285 {
 286     gdk_gl_context_make_current(ctx);
 287     return 0;
 288 }