New OpenGL batching canvas renderer

1 files changed, 133 insertions, 0 deletions

diff --git a/servers/rendering/shader_compiler.h b/servers/rendering/shader_compiler.h
new file mode 100644
index 0000000000..478f64bc17
--- /dev/null
+++ b/servers/rendering/shader_compiler.h
@@ -0,0 +1,133 @@
+/*************************************************************************/
+/*  shader_compiler.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 SHADER_COMPILER_H
+#define SHADER_COMPILER_H
+
+#include "core/templates/pair.h"
+#include "servers/rendering/shader_language.h"
+#include "servers/rendering/shader_types.h"
+#include "servers/rendering_server.h"
+
+class ShaderCompiler {
+public:
+	enum Stage {
+		STAGE_VERTEX,
+		STAGE_FRAGMENT,
+		STAGE_COMPUTE,
+		STAGE_MAX
+	};
+
+	struct IdentifierActions {
+		Map<StringName, Stage> entry_point_stages;
+
+		Map<StringName, Pair<int *, int>> render_mode_values;
+		Map<StringName, bool *> render_mode_flags;
+		Map<StringName, bool *> usage_flag_pointers;
+		Map<StringName, bool *> write_flag_pointers;
+
+		Map<StringName, ShaderLanguage::ShaderNode::Uniform> *uniforms;
+	};
+
+	struct GeneratedCode {
+		Vector<String> defines;
+		struct Texture {
+			StringName name;
+			ShaderLanguage::DataType type;
+			ShaderLanguage::ShaderNode::Uniform::Hint hint;
+			ShaderLanguage::TextureFilter filter;
+			ShaderLanguage::TextureRepeat repeat;
+			bool global;
+			int array_size;
+		};
+
+		Vector<Texture> texture_uniforms;
+
+		Vector<uint32_t> uniform_offsets;
+		uint32_t uniform_total_size;
+		String uniforms;
+		String stage_globals[STAGE_MAX];
+
+		Map<String, String> code;
+
+		bool uses_global_textures;
+		bool uses_fragment_time;
+		bool uses_vertex_time;
+	};
+
+	struct DefaultIdentifierActions {
+		Map<StringName, String> renames;
+		Map<StringName, String> render_mode_defines;
+		Map<StringName, String> usage_defines;
+		Map<StringName, String> custom_samplers;
+		ShaderLanguage::TextureFilter default_filter;
+		ShaderLanguage::TextureRepeat default_repeat;
+		String sampler_array_name;
+		int base_texture_binding_index = 0;
+		int texture_layout_set = 0;
+		String base_uniform_string;
+		String global_buffer_array_variable;
+		String instance_uniform_index_variable;
+		uint32_t base_varying_index = 0;
+		bool apply_luminance_multiplier = false;
+	};
+
+private:
+	ShaderLanguage parser;
+
+	String _get_sampler_name(ShaderLanguage::TextureFilter p_filter, ShaderLanguage::TextureRepeat p_repeat);
+
+	void _dump_function_deps(const ShaderLanguage::ShaderNode *p_node, const StringName &p_for_func, const Map<StringName, String> &p_func_code, String &r_to_add, Set<StringName> &added);
+	String _dump_node_code(const ShaderLanguage::Node *p_node, int p_level, GeneratedCode &r_gen_code, IdentifierActions &p_actions, const DefaultIdentifierActions &p_default_actions, bool p_assigning, bool p_scope = true);
+
+	const ShaderLanguage::ShaderNode *shader;
+	const ShaderLanguage::FunctionNode *function;
+	StringName current_func_name;
+	StringName time_name;
+	Set<StringName> texture_functions;
+
+	Set<StringName> used_name_defines;
+	Set<StringName> used_flag_pointers;
+	Set<StringName> used_rmode_defines;
+	Set<StringName> internal_functions;
+	Set<StringName> fragment_varyings;
+
+	DefaultIdentifierActions actions;
+
+	static ShaderLanguage::DataType _get_variable_type(const StringName &p_type);
+
+public:
+	Error compile(RS::ShaderMode p_mode, const String &p_code, IdentifierActions *p_actions, const String &p_path, GeneratedCode &r_gen_code);
+
+	void initialize(DefaultIdentifierActions p_actions);
+	ShaderCompiler();
+};
+
+#endif // SHADER_COMPILER_H