Extracting render buffers and changing it to a more generic solution

2 files changed, 201 insertions, 0 deletions

diff --git a/drivers/gles3/storage/render_scene_buffers_gles3.cpp b/drivers/gles3/storage/render_scene_buffers_gles3.cpp
new file mode 100644
index 0000000000..5d121e2ef9
--- /dev/null
+++ b/drivers/gles3/storage/render_scene_buffers_gles3.cpp
@@ -0,0 +1,103 @@
+/*************************************************************************/
+/*  render_scene_buffers_gles3.cpp                                       */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2022 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.                */
+/*************************************************************************/
+
+#ifdef GLES3_ENABLED
+
+#include "render_scene_buffers_gles3.h"
+#include "texture_storage.h"
+
+RenderSceneBuffersGLES3::~RenderSceneBuffersGLES3() {
+	free_render_buffer_data();
+}
+
+void RenderSceneBuffersGLES3::configure(RID p_render_target, const Size2i p_internal_size, const Size2i p_target_size, float p_fsr_sharpness, float p_texture_mipmap_bias, RS::ViewportMSAA p_msaa, RenderingServer::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) {
+	GLES3::TextureStorage *texture_storage = GLES3::TextureStorage::get_singleton();
+
+	//internal_size.x = p_internal_size.x; // ignore for now
+	//internal_size.y = p_internal_size.y;
+	width = p_target_size.x;
+	height = p_target_size.y;
+	//fsr_sharpness = p_fsr_sharpness;
+	//texture_mipmap_bias = p_texture_mipmap_bias;
+	render_target = p_render_target;
+	//msaa = p_msaa;
+	//screen_space_aa = p_screen_space_aa;
+	//use_debanding = p_use_debanding;
+	//view_count = p_view_count;
+
+	free_render_buffer_data();
+
+	GLES3::RenderTarget *rt = texture_storage->get_render_target(p_render_target);
+
+	is_transparent = rt->is_transparent;
+
+	// framebuffer
+	glGenFramebuffers(1, &framebuffer);
+	glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
+
+	glBindTexture(GL_TEXTURE_2D, rt->color);
+	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, rt->color, 0);
+
+	glGenTextures(1, &depth_texture);
+	glBindTexture(GL_TEXTURE_2D, depth_texture);
+
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, rt->size.x, rt->size.y, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, nullptr);
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depth_texture, 0);
+
+	GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+
+	glBindTexture(GL_TEXTURE_2D, 0);
+	glBindFramebuffer(GL_FRAMEBUFFER, texture_storage->system_fbo);
+
+	if (status != GL_FRAMEBUFFER_COMPLETE) {
+		free_render_buffer_data();
+		WARN_PRINT("Could not create 3D renderbuffer, status: " + texture_storage->get_framebuffer_error(status));
+		return;
+	}
+}
+
+void RenderSceneBuffersGLES3::free_render_buffer_data() {
+	if (depth_texture) {
+		glDeleteTextures(1, &depth_texture);
+		depth_texture = 0;
+	}
+	if (framebuffer) {
+		glDeleteFramebuffers(1, &framebuffer);
+		framebuffer = 0;
+	}
+}
+
+#endif // GLES3_ENABLED
diff --git a/drivers/gles3/storage/render_scene_buffers_gles3.h b/drivers/gles3/storage/render_scene_buffers_gles3.h
new file mode 100644
index 0000000000..ad0d2032b0
--- /dev/null
+++ b/drivers/gles3/storage/render_scene_buffers_gles3.h
@@ -0,0 +1,98 @@
+/*************************************************************************/
+/*  render_scene_buffers_gles3.h                                         */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2022 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 RENDER_SCENE_BUFFERS_GLES3_H
+#define RENDER_SCENE_BUFFERS_GLES3_H
+
+#ifdef GLES3_ENABLED
+
+#include "servers/rendering/storage/render_scene_buffers.h"
+
+#include "platform_config.h"
+#ifndef OPENGL_INCLUDE_H
+#include <GLES3/gl3.h>
+#else
+#include OPENGL_INCLUDE_H
+#endif
+
+class RenderSceneBuffersGLES3 : public RenderSceneBuffers {
+	GDCLASS(RenderSceneBuffersGLES3, RenderSceneBuffers);
+
+public:
+	// Original implementation, need to investigate which ones we'll keep like this and what we'll change...
+
+	int internal_width = 0;
+	int internal_height = 0;
+	int width = 0;
+	int height = 0;
+	//float fsr_sharpness = 0.2f;
+	RS::ViewportMSAA msaa = RS::VIEWPORT_MSAA_DISABLED;
+	//RS::ViewportScreenSpaceAA screen_space_aa = RS::VIEWPORT_SCREEN_SPACE_AA_DISABLED;
+	//bool use_debanding = false;
+	//uint32_t view_count = 1;
+
+	bool is_transparent = false;
+
+	RID render_target;
+	GLuint internal_texture = 0; // Used for rendering when post effects are enabled
+	GLuint depth_texture = 0; // Main depth texture
+	GLuint framebuffer = 0; // Main framebuffer, contains internal_texture and depth_texture or render_target->color and depth_texture
+
+	//built-in textures used for ping pong image processing and blurring
+	struct Blur {
+		RID texture;
+
+		struct Mipmap {
+			RID texture;
+			int width;
+			int height;
+			GLuint fbo;
+		};
+
+		Vector<Mipmap> mipmaps;
+	};
+
+	Blur blur[2]; //the second one starts from the first mipmap
+
+private:
+public:
+	virtual ~RenderSceneBuffersGLES3();
+	virtual void configure(RID p_render_target, const Size2i p_internal_size, const Size2i p_target_size, float p_fsr_sharpness, float p_texture_mipmap_bias, RS::ViewportMSAA p_msaa, RenderingServer::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) override;
+
+	virtual void set_fsr_sharpness(float p_fsr_sharpness) override{};
+	virtual void set_texture_mipmap_bias(float p_texture_mipmap_bias) override{};
+	virtual void set_use_debanding(bool p_use_debanding) override{};
+
+	void free_render_buffer_data();
+};
+
+#endif // GLES3_ENABLED
+
+#endif // RENDER_SCENE_BUFFERS_GLES3_H