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