+static DisplaySurface* defaultallocator_create_displaysurface(int width, int height)
+{
+ DisplaySurface *surface = (DisplaySurface*) qemu_mallocz(sizeof(DisplaySurface));
+
+ int linesize = width * 4;
+ qemu_alloc_display(surface, width, height, linesize,
+ qemu_default_pixelformat(32), 0);
+ return surface;
+}
+
+static DisplaySurface* defaultallocator_resize_displaysurface(DisplaySurface *surface,
+ int width, int height)
+{
+ int linesize = width * 4;
+ qemu_alloc_display(surface, width, height, linesize,
+ qemu_default_pixelformat(32), 0);
+ return surface;
+}
+
+void qemu_alloc_display(DisplaySurface *surface, int width, int height,
+ int linesize, PixelFormat pf, int newflags)
+{
+ void *data;
+ surface->width = width;
+ surface->height = height;
+ surface->linesize = linesize;
+ surface->pf = pf;
+ if (surface->flags & QEMU_ALLOCATED_FLAG) {
+ data = qemu_realloc(surface->data,
+ surface->linesize * surface->height);
+ } else {
+ data = qemu_malloc(surface->linesize * surface->height);
+ }
+ surface->data = (uint8_t *)data;
+ surface->flags = newflags | QEMU_ALLOCATED_FLAG;
+#ifdef HOST_WORDS_BIGENDIAN
+ surface->flags |= QEMU_BIG_ENDIAN_FLAG;
+#endif
+}
+
+DisplaySurface* qemu_create_displaysurface_from(int width, int height, int bpp,
+ int linesize, uint8_t *data)
+{
+ DisplaySurface *surface = (DisplaySurface*) qemu_mallocz(sizeof(DisplaySurface));
+
+ surface->width = width;
+ surface->height = height;
+ surface->linesize = linesize;
+ surface->pf = qemu_default_pixelformat(bpp);
+#ifdef HOST_WORDS_BIGENDIAN
+ surface->flags = QEMU_BIG_ENDIAN_FLAG;
+#endif
+ surface->data = data;
+
+ return surface;
+}
+
+static void defaultallocator_free_displaysurface(DisplaySurface *surface)
+{
+ if (surface == NULL)
+ return;
+ if (surface->flags & QEMU_ALLOCATED_FLAG)
+ qemu_free(surface->data);
+ qemu_free(surface);
+}
+
+static struct DisplayAllocator default_allocator = {
+ defaultallocator_create_displaysurface,
+ defaultallocator_resize_displaysurface,
+ defaultallocator_free_displaysurface
+};
+
+static void dumb_display_init(void)
+{
+ DisplayState *ds = qemu_mallocz(sizeof(DisplayState));
+ int width = 640;
+ int height = 480;
+
+ ds->allocator = &default_allocator;
+ if (is_fixedsize_console()) {
+ width = active_console->g_width;
+ height = active_console->g_height;
+ }
+ ds->surface = qemu_create_displaysurface(ds, width, height);
+ register_displaystate(ds);
+}
+
+/***********************************************************/
+/* register display */
+
+void register_displaystate(DisplayState *ds)
+{
+ DisplayState **s;
+ s = &display_state;
+ while (*s != NULL)
+ s = &(*s)->next;
+ ds->next = NULL;
+ *s = ds;
+}
+
+DisplayState *get_displaystate(void)
+{
+ if (!display_state) {
+ dumb_display_init ();
+ }
+ return display_state;
+}
+
+DisplayAllocator *register_displayallocator(DisplayState *ds, DisplayAllocator *da)
+{
+ if(ds->allocator == &default_allocator) {
+ DisplaySurface *surf;
+ surf = da->create_displaysurface(ds_get_width(ds), ds_get_height(ds));
+ defaultallocator_free_displaysurface(ds->surface);
+ ds->surface = surf;
+ ds->allocator = da;
+ }
+ return ds->allocator;
+}
+