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Diffstat (limited to 'drivers/opengl/shader_opengl.h')
| -rw-r--r-- | drivers/opengl/shader_opengl.h | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/drivers/opengl/shader_opengl.h b/drivers/opengl/shader_opengl.h new file mode 100644 index 0000000000..4896bd6f2b --- /dev/null +++ b/drivers/opengl/shader_opengl.h @@ -0,0 +1,277 @@ +/*************************************************************************/ +/* shader_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 SHADER_OPENGL_H +#define SHADER_OPENGL_H + +#include "drivers/opengl/rasterizer_platforms.h" +#ifdef OPENGL_BACKEND_ENABLED + +// This must come first to avoid windows.h mess +#include "platform_config.h" +#ifndef OPENGL_INCLUDE_H +#include <GLES3/gl3.h> +#else +#include OPENGL_INCLUDE_H +#endif + +#include "core/math/camera_matrix.h" +#include "core/templates/hash_map.h" +#include "core/templates/map.h" +#include "core/templates/pair.h" +#include "core/variant/variant.h" +#include "servers/rendering/shader_language.h" + +#include <stdio.h> + +class RasterizerStorageOpenGL; + +class ShaderOpenGL { +protected: + struct Enum { + uint64_t mask; + uint64_t shift; + const char *defines[16]; + }; + + struct EnumValue { + uint64_t set_mask; + uint64_t clear_mask; + }; + + struct AttributePair { + const char *name; + int index; + }; + + struct UniformPair { + const char *name; + Variant::Type type_hint; + }; + + struct TexUnitPair { + const char *name; + int index; + }; + + bool uniforms_dirty; + +private: + bool valid = false; + + //@TODO Optimize to a fixed set of shader pools and use a LRU + int uniform_count; + int texunit_pair_count; + int conditional_count; + int vertex_code_start; + int fragment_code_start; + int attribute_pair_count; + + struct CustomCode { + String vertex; + String vertex_globals; + String fragment; + String fragment_globals; + String light; + uint32_t version; + Vector<StringName> texture_uniforms; + Vector<StringName> custom_uniforms; + Vector<CharString> custom_defines; + Set<uint32_t> versions; + }; + + struct Version { + GLuint id; + GLuint vert_id; + GLuint frag_id; + GLint *uniform_location; + Vector<GLint> texture_uniform_locations; + Map<StringName, GLint> custom_uniform_locations; + uint32_t code_version; + bool ok; + Version() { + id = 0; + vert_id = 0; + frag_id = 0; + uniform_location = NULL; + code_version = 0; + ok = false; + } + }; + + Version *version; + + union VersionKey { + struct { + uint32_t version; + uint32_t code_version; + }; + uint64_t key; + bool operator==(const VersionKey &p_key) const { return key == p_key.key; } + bool operator<(const VersionKey &p_key) const { return key < p_key.key; } + }; + + struct VersionKeyHash { + static _FORCE_INLINE_ uint32_t hash(const VersionKey &p_key) { return HashMapHasherDefault::hash(p_key.key); } + }; + + //this should use a way more cachefriendly version.. + HashMap<VersionKey, Version, VersionKeyHash> version_map; + + HashMap<uint32_t, CustomCode> custom_code_map; + uint32_t last_custom_code; + + VersionKey conditional_version; + VersionKey new_conditional_version; + + virtual String get_shader_name() const = 0; + + const char **conditional_defines; + const char **uniform_names; + const AttributePair *attribute_pairs; + const TexUnitPair *texunit_pairs; + const char *vertex_code; + const char *fragment_code; + CharString fragment_code0; + CharString fragment_code1; + CharString fragment_code2; + CharString fragment_code3; + + CharString vertex_code0; + CharString vertex_code1; + CharString vertex_code2; + + Vector<CharString> custom_defines; + + Version *get_current_version(); + + static ShaderOpenGL *active; + + int max_image_units; + + Map<StringName, Pair<ShaderLanguage::DataType, Vector<ShaderLanguage::ConstantNode::Value>>> uniform_values; + +protected: + _FORCE_INLINE_ int _get_uniform(int p_which) const; + _FORCE_INLINE_ void _set_conditional(int p_which, bool p_value); + + void setup(const char **p_conditional_defines, + int p_conditional_count, + const char **p_uniform_names, + int p_uniform_count, + const AttributePair *p_attribute_pairs, + int p_attribute_count, + const TexUnitPair *p_texunit_pairs, + int p_texunit_pair_count, + const char *p_vertex_code, + const char *p_fragment_code, + int p_vertex_code_start, + int p_fragment_code_start); + + ShaderOpenGL(); + +public: + enum { + CUSTOM_SHADER_DISABLED = 0 + }; + + GLint get_uniform_location(const String &p_name) const; + GLint get_uniform_location(int p_index) const; + + static _FORCE_INLINE_ ShaderOpenGL *get_active() { return active; } + bool bind(); + void unbind(); + + inline GLuint get_program() const { return version ? version->id : 0; } + + void clear_caches(); + + uint32_t create_custom_shader(); + void set_custom_shader_code(uint32_t p_code_id, + const String &p_vertex, + const String &p_vertex_globals, + const String &p_fragment, + const String &p_light, + const String &p_fragment_globals, + const Vector<StringName> &p_uniforms, + const Vector<StringName> &p_texture_uniforms, + const Vector<CharString> &p_custom_defines); + + void set_custom_shader(uint32_t p_code_id); + void free_custom_shader(uint32_t p_code_id); + + uint32_t get_version_key() const { return conditional_version.version; } + + // this void* is actually a RasterizerStorageOpenGL::Material, but C++ doesn't + // like forward declared nested classes. + void use_material(void *p_material); + + _FORCE_INLINE_ uint32_t get_version() const { return new_conditional_version.version; } + _FORCE_INLINE_ bool is_version_valid() const { return version && version->ok; } + + virtual void init() = 0; + void finish(); + + void add_custom_define(const String &p_define) { + custom_defines.push_back(p_define.utf8()); + } + + void get_custom_defines(Vector<String> *p_defines) { + for (int i = 0; i < custom_defines.size(); i++) { + p_defines->push_back(custom_defines[i].get_data()); + } + } + + void remove_custom_define(const String &p_define) { + custom_defines.erase(p_define.utf8()); + } + + virtual ~ShaderOpenGL(); +}; + +// called a lot, made inline + +int ShaderOpenGL::_get_uniform(int p_which) const { + ERR_FAIL_INDEX_V(p_which, uniform_count, -1); + ERR_FAIL_COND_V(!version, -1); + return version->uniform_location[p_which]; +} + +void ShaderOpenGL::_set_conditional(int p_which, bool p_value) { + ERR_FAIL_INDEX(p_which, conditional_count); + if (p_value) + new_conditional_version.version |= (1 << p_which); + else + new_conditional_version.version &= ~(1 << p_which); +} + +#endif // OPENGL_BACKEND_ENABLED + +#endif // SHADER_OPENGL_H |