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         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
  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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 334 void gtk_gl_area_init(void)
 335 {
 336     display_opengl = 1;
 337 }
 338
 339 int gd_gl_area_make_current(DisplayGLCtx *dgc,
 340                             QEMUGLContext ctx)
 341 {
 342     gdk_gl_context_make_current(ctx);
 343     return 0;
 344 }