Remove obsolete GLES2 backend code

This code currently isn't compiled (and cannot compile).

We plan to re-add OpenGL ES-based renderer(s) in Godot 4.0 alongside Vulkan
(probably ES 3.0, possibly also a low-end ES 2.0), but the code will be quite
different so it's not relevant to keep this old Godot 3.2 code.

The `drivers/gles2` code from the `3.2` branch can be used as a reference for
a potential new implementation.

1 files changed, 0 insertions, 75 deletions

diff --git a/drivers/gles2/rasterizer_gles2.h b/drivers/gles2/rasterizer_gles2.h
deleted file mode 100644
index e9bef31d1e..0000000000
--- a/drivers/gles2/rasterizer_gles2.h
+++ /dev/null
@@ -1,75 +0,0 @@
-/*************************************************************************/
-/*  rasterizer_gles2.h                                                   */
-/*************************************************************************/
-/*                       This file is part of:                           */
-/*                           GODOT ENGINE                                */
-/*                      https://godotengine.org                          */
-/*************************************************************************/
-/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
-/* Copyright (c) 2014-2020 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 RASTERIZERGLES2_H
-#define RASTERIZERGLES2_H
-
-#include "rasterizer_canvas_gles2.h"
-#include "rasterizer_scene_gles2.h"
-#include "rasterizer_storage_gles2.h"
-#include "servers/rendering/rasterizer.h"
-
-class RasterizerGLES2 : public Rasterizer {
-	static Rasterizer *_create_current();
-
-	RasterizerStorageGLES2 *storage;
-	RasterizerCanvasGLES2 *canvas;
-	RasterizerSceneGLES2 *scene;
-
-	double time_total;
-
-public:
-	virtual RasterizerStorage *get_storage();
-	virtual RasterizerCanvas *get_canvas();
-	virtual RasterizerScene *get_scene();
-
-	virtual void set_boot_image(const Ref<Image> &p_image, const Color &p_color, bool p_scale, bool p_use_filter = true);
-
-	virtual void initialize();
-	virtual void begin_frame(double frame_step);
-	virtual void set_current_render_target(RID p_render_target);
-	virtual void restore_render_target(bool p_3d_was_drawn);
-	virtual void clear_render_target(const Color &p_color);
-	virtual void blit_render_target_to_screen(RID p_render_target, const Rect2 &p_screen_rect, int p_screen = 0);
-	virtual void output_lens_distorted_to_screen(RID p_render_target, const Rect2 &p_screen_rect, float p_k1, float p_k2, const Vector2 &p_eye_center, float p_oversample);
-	virtual void end_frame(bool p_swap_buffers);
-	virtual void finalize();
-
-	static Error is_viable();
-	static void make_current();
-	static void register_config();
-
-	virtual bool is_low_end() const { return true; }
-
-	RasterizerGLES2();
-	~RasterizerGLES2();
-};
-
-#endif // RASTERIZERGLES2_H