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