GPUDrawList: GL backend isolation

1 files changed, 46 insertions, 0 deletions

diff --git a/source/blender/gpu/GPU_drawlist.h b/source/blender/gpu/GPU_drawlist.h
new file mode 100644
index 00000000000..27f70da8cf8
--- /dev/null
+++ b/source/blender/gpu/GPU_drawlist.h
@@ -0,0 +1,46 @@
+/*
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2020 Blender Foundation.
+ * All rights reserved.
+ */
+
+/** \file
+ * \ingroup gpu
+ *
+ * GPUDrawList is an API to do lots of similar draw-calls very fast using
+ * multi-draw-indirect. There is a fallback if the feature is not supported.
+ */
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct GPUBatch;
+
+typedef void *GPUDrawList; /* Opaque pointer. */
+
+/* Create a list with at least length drawcalls. Length can affect performance. */
+GPUDrawList GPU_draw_list_create(int length);
+void GPU_draw_list_discard(GPUDrawList list);
+
+void GPU_draw_list_append(GPUDrawList list, GPUBatch *batch, int i_first, int i_count);
+void GPU_draw_list_submit(GPUDrawList list);
+
+#ifdef __cplusplus
+}
+#endif