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     int ww, wh, y1, y2;
  42
  43     if (!vc->gfx.gls) {
  44         return;
  45     }
  46
  47     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
  48     ww = gtk_widget_get_allocated_width(vc->gfx.drawing_area);
  49     wh = gtk_widget_get_allocated_height(vc->gfx.drawing_area);
  50
  51     if (vc->gfx.scanout_mode) {
  52         if (!vc->gfx.guest_fb.framebuffer) {
  53             return;
  54         }
  55
  56         glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.guest_fb.framebuffer);
  57         /* GtkGLArea sets GL_DRAW_FRAMEBUFFER for us */
  58
  59         glViewport(0, 0, ww, wh);
  60         y1 = vc->gfx.y0_top ? 0 : vc->gfx.h;
  61         y2 = vc->gfx.y0_top ? vc->gfx.h : 0;
  62         glBlitFramebuffer(0, y1, vc->gfx.w, y2,
  63                           0, 0, ww, wh,
  64                           GL_COLOR_BUFFER_BIT, GL_NEAREST);
  65     } else {
  66         if (!vc->gfx.ds) {
  67             return;
  68         }
  69         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
  70
  71         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
  72         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
  73     }
  74
  75 #ifdef CONFIG_GBM
  76     if (vc->gfx.guest_fb.dmabuf) {
  77         egl_dmabuf_create_sync(vc->gfx.guest_fb.dmabuf);
  78     }
  79 #endif
  80
  81     glFlush();
  82 #ifdef CONFIG_GBM
  83     if (vc->gfx.guest_fb.dmabuf) {
  84         QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
  85
  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     graphic_hw_gl_flushed(vc->gfx.dcl.con);
  95 }
  96
  97 void gd_gl_area_update(DisplayChangeListener *dcl,
  98                    int x, int y, int w, int h)
  99 {
 100     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 101
 102     if (!vc->gfx.gls || !vc->gfx.ds) {
 103         return;
 104     }
 105
 106     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 107     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 108     vc->gfx.glupdates++;
 109 }
 110
 111 void gd_gl_area_refresh(DisplayChangeListener *dcl)
 112 {
 113     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 114
 115     if (!vc->gfx.gls) {
 116         if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
 117             return;
 118         }
 119         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 120         vc->gfx.gls = qemu_gl_init_shader();
 121         if (vc->gfx.ds) {
 122             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 123         }
 124     }
 125
 126     graphic_hw_update(dcl->con);
 127
 128     if (vc->gfx.glupdates) {
 129         vc->gfx.glupdates = 0;
 130         gtk_gl_area_set_scanout_mode(vc, false);
 131         gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
 132     }
 133 }
 134
 135 void gd_gl_area_switch(DisplayChangeListener *dcl,
 136                        DisplaySurface *surface)
 137 {
 138     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 139     bool resized = true;
 140
 141     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 142
 143     if (vc->gfx.ds &&
 144         surface_width(vc->gfx.ds) == surface_width(surface) &&
 145         surface_height(vc->gfx.ds) == surface_height(surface)) {
 146         resized = false;
 147     }
 148
 149     if (vc->gfx.gls) {
 150         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 151         surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 152         surface_gl_create_texture(vc->gfx.gls, surface);
 153     }
 154     vc->gfx.ds = surface;
 155
 156     if (resized) {
 157         gd_update_windowsize(vc);
 158     }
 159 }
 160
 161 QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl,
 162                                         QEMUGLParams *params)
 163 {
 164     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 165     GdkWindow *window;
 166     GdkGLContext *ctx;
 167     GError *err = NULL;
 168
 169     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 170     window = gtk_widget_get_window(vc->gfx.drawing_area);
 171     ctx = gdk_window_create_gl_context(window, &err);
 172     if (err) {
 173         g_printerr("Create gdk gl context failed: %s\n", err->message);
 174         g_error_free(err);
 175         return NULL;
 176     }
 177     gdk_gl_context_set_required_version(ctx,
 178                                         params->major_ver,
 179                                         params->minor_ver);
 180     gdk_gl_context_realize(ctx, &err);
 181     if (err) {
 182         g_printerr("Realize gdk gl context failed: %s\n", err->message);
 183         g_error_free(err);
 184         g_clear_object(&ctx);
 185         return NULL;
 186     }
 187     return ctx;
 188 }
 189
 190 void gd_gl_area_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
 191 {
 192     /* FIXME */
 193 }
 194
 195 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
 196                                 uint32_t backing_id,
 197                                 bool backing_y_0_top,
 198                                 uint32_t backing_width,
 199                                 uint32_t backing_height,
 200                                 uint32_t x, uint32_t y,
 201                                 uint32_t w, uint32_t h)
 202 {
 203     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 204
 205     vc->gfx.x = x;
 206     vc->gfx.y = y;
 207     vc->gfx.w = w;
 208     vc->gfx.h = h;
 209     vc->gfx.y0_top = backing_y_0_top;
 210
 211     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 212
 213     if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
 214         gtk_gl_area_set_scanout_mode(vc, false);
 215         return;
 216     }
 217
 218     gtk_gl_area_set_scanout_mode(vc, true);
 219     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 220                          backing_id, false);
 221 }
 222
 223 void gd_gl_area_scanout_disable(DisplayChangeListener *dcl)
 224 {
 225     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 226
 227     gtk_gl_area_set_scanout_mode(vc, false);
 228 }
 229
 230 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
 231                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 232 {
 233     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 234
 235     if (vc->gfx.guest_fb.dmabuf) {
 236         graphic_hw_gl_block(vc->gfx.dcl.con, true);
 237     }
 238     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
 239 }
 240
 241 void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
 242                                QemuDmaBuf *dmabuf)
 243 {
 244 #ifdef CONFIG_GBM
 245     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 246
 247     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 248     egl_dmabuf_import_texture(dmabuf);
 249     if (!dmabuf->texture) {
 250         return;
 251     }
 252
 253     gd_gl_area_scanout_texture(dcl, dmabuf->texture,
 254                                false, dmabuf->width, dmabuf->height,
 255                                0, 0, dmabuf->width, dmabuf->height);
 256
 257     if (dmabuf->allow_fences) {
 258         vc->gfx.guest_fb.dmabuf = dmabuf;
 259     }
 260 #endif
 261 }
 262
 263 void gtk_gl_area_init(void)
 264 {
 265     display_opengl = 1;
 266 }
 267
 268 int gd_gl_area_make_current(DisplayChangeListener *dcl,
 269                             QEMUGLContext ctx)
 270 {
 271     gdk_gl_context_make_current(ctx);
 272     return 0;
 273 }