Rename GLES2 driver to OpenGL to prepare for the upgrade to GLES3

- Use lowercase driver names for the `--rendering-driver`
  command line argument.

1 files changed, 71 insertions, 0 deletions

diff --git a/drivers/opengl/rasterizer_canvas_opengl.h b/drivers/opengl/rasterizer_canvas_opengl.h
new file mode 100644
index 0000000000..ff5295e739
--- /dev/null
+++ b/drivers/opengl/rasterizer_canvas_opengl.h
@@ -0,0 +1,71 @@
+/*************************************************************************/
+/*  rasterizer_canvas_opengl.h                                           */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef RASTERIZER_CANVAS_OPENGL_H
+#define RASTERIZER_CANVAS_OPENGL_H
+
+#include "drivers/opengl/rasterizer_platforms.h"
+#ifdef OPENGL_BACKEND_ENABLED
+
+#include "drivers/opengl/rasterizer_canvas_batcher.h"
+#include "rasterizer_canvas_base_opengl.h"
+
+class RasterizerSceneOpenGL;
+
+class RasterizerCanvasOpenGL : public RasterizerCanvasBaseOpenGL, public RasterizerCanvasBatcher<RasterizerCanvasOpenGL, RasterizerStorageOpenGL> {
+	friend class RasterizerCanvasBatcher<RasterizerCanvasOpenGL, RasterizerStorageOpenGL>;
+
+private:
+	// legacy codepath .. to remove after testing
+	void _legacy_canvas_render_item(Item *p_ci, RenderItemState &r_ris);
+
+	// high level batch funcs
+	void canvas_render_items_implementation(Item *p_item_list, int p_z, const Color &p_modulate, Light *p_light, const Transform2D &p_base_transform);
+	void render_batches(Item::Command *const *p_commands, Item *p_current_clip, bool &r_reclip, RasterizerStorageOpenGL::Material *p_material);
+
+	// funcs used from rasterizer_canvas_batcher template
+	void gl_enable_scissor(int p_x, int p_y, int p_width, int p_height) const;
+	void gl_disable_scissor() const;
+
+public:
+	void canvas_render_items_begin(const Color &p_modulate, Light *p_light, const Transform2D &p_base_transform);
+	void canvas_render_items_end();
+	void canvas_render_items_internal(Item *p_item_list, int p_z, const Color &p_modulate, Light *p_light, const Transform2D &p_base_transform);
+	void canvas_begin() override;
+	void canvas_end() override;
+
+	void canvas_render_items(RID p_to_render_target, Item *p_item_list, const Color &p_modulate, Light *p_light_list, Light *p_directional_list, const Transform2D &p_canvas_transform, RS::CanvasItemTextureFilter p_default_filter, RS::CanvasItemTextureRepeat p_default_repeat, bool p_snap_2d_vertices_to_pixel, bool &r_sdf_used) override;
+
+	void initialize();
+	RasterizerCanvasOpenGL();
+};
+
+#endif // OPENGL_BACKEND_ENABLED
+#endif // RASTERIZER_CANVAS_OPENGL_H