GPUDrawList: GL backend isolation

1 files changed, 80 insertions, 0 deletions

diff --git a/source/blender/gpu/opengl/gl_drawlist.hh b/source/blender/gpu/opengl/gl_drawlist.hh
new file mode 100644
index 00000000000..4f085149388
--- /dev/null
+++ b/source/blender/gpu/opengl/gl_drawlist.hh
@@ -0,0 +1,80 @@
+/*
+ * 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
+ */
+
+#pragma once
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_sys_types.h"
+
+#include "GPU_batch.h"
+#include "GPU_glew.h"
+
+#include "gpu_drawlist_private.hh"
+
+#include "gl_context.hh"
+
+namespace blender {
+namespace gpu {
+
+class GLDrawList : public DrawList {
+ public:
+  GLDrawList(int length);
+  ~GLDrawList();
+
+  void append(GPUBatch *batch, int i_first, int i_count) override;
+  void submit(void) override;
+
+ private:
+  void init(void);
+
+  /** Batch for which we are recording commands for. */
+  GPUBatch *batch_;
+  /** Mapped memory bounds. */
+  GLbyte *data_;
+  /** Length of the mapped buffer (in byte). */
+  GLsizeiptr data_size_;
+  /** Current offset inside the mapped buffer (in byte). */
+  GLintptr command_offset_;
+  /** Current number of command recorded inside the mapped buffer. */
+  uint command_len_;
+  /** Is UINT_MAX if not drawing indexed geom. Also Avoid dereferencing batch. */
+  GLuint base_index_;
+  /** Also Avoid dereferencing batch. */
+  GLuint v_first_, v_count_;
+
+  /** GL Indirect Buffer id. 0 means MultiDrawIndirect is not supported/enabled. */
+  GLuint buffer_id_;
+  /** Length of whole the buffer (in byte). */
+  GLsizeiptr buffer_size_;
+  /** Offset of data_ inside the whole buffer (in byte). */
+  GLintptr data_offset_;
+
+  /** To free the buffer_id_. */
+  GLContext *context_;
+
+  MEM_CXX_CLASS_ALLOC_FUNCS("GLDrawList");
+};
+
+}  // namespace gpu
+}  // namespace blender