1 files changed, 118 insertions, 0 deletions
diff --git a/source/blender/windowmanager/intern/wm_surface.c b/source/blender/windowmanager/intern/wm_surface.c
new file mode 100644
index 00000000000..cb575cc8f7d
--- /dev/null
+++ b/source/blender/windowmanager/intern/wm_surface.c
@@ -0,0 +1,118 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/** \file
+ * \ingroup wm
+ */
+
+#include "BKE_context.h"
+
+#include "BLF_api.h"
+
+#include "BLI_listbase.h"
+#include "BLI_threads.h"
+
+#include "GHOST_C-api.h"
+
+#include "GPU_batch_presets.h"
+#include "GPU_framebuffer.h"
+#include "GPU_immediate.h"
+#include "GPU_context.h"
+
+#include "MEM_guardedalloc.h"
+
+#include "WM_types.h"
+#include "WM_api.h"
+#include "wm.h"
+
+#include "wm_surface.h"
+
+static ListBase global_surface_list = {NULL, NULL};
+static wmSurface *g_drawable = NULL;
+
+void wm_surfaces_iter(bContext *C, void (*cb)(bContext *C, wmSurface *))
+{
+  for (wmSurface *surf = global_surface_list.first; surf; surf = surf->next) {
+    cb(C, surf);
+  }
+}
+
+void wm_surface_clear_drawable(void)
+{
+  if (g_drawable) {
+    BLF_batch_reset();
+    gpu_batch_presets_reset();
+    immDeactivate();
+
+    g_drawable = NULL;
+  }
+}
+
+void wm_surface_set_drawable(wmSurface *surface, bool activate)
+{
+  BLI_assert(ELEM(g_drawable, NULL, surface));
+
+  g_drawable = surface;
+  if (activate) {
+    GHOST_ActivateOpenGLContext(surface->ghost_ctx);
+  }
+
+  GPU_context_active_set(surface->gpu_ctx);
+  immActivate();
+}
+
+void wm_surface_make_drawable(wmSurface *surface)
+{
+  BLI_assert(GPU_framebuffer_active_get() == NULL);
+
+  if (surface != g_drawable) {
+    wm_surface_clear_drawable();
+    wm_surface_set_drawable(surface, true);
+  }
+}
+
+void wm_surface_reset_drawable(void)
+{
+  BLI_assert(BLI_thread_is_main());
+  BLI_assert(GPU_framebuffer_active_get() == NULL);
+
+  if (g_drawable) {
+    wm_surface_clear_drawable();
+    wm_surface_set_drawable(g_drawable, true);
+  }
+}
+
+void wm_surface_add(wmSurface *surface)
+{
+  BLI_addtail(&global_surface_list, surface);
+}
+
+void wm_surface_remove(wmSurface *surface)
+{
+  BLI_remlink(&global_surface_list, surface);
+  surface->free_data(surface);
+  MEM_freeN(surface);
+}
+
+void wm_surfaces_free(void)
+{
+  for (wmSurface *surf = global_surface_list.first, *surf_next; surf; surf = surf_next) {
+    surf_next = surf->next;
+    wm_surface_remove(surf);
+  }
+
+  BLI_assert(BLI_listbase_is_empty(&global_surface_list));
+}