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virtualx-engine/drivers/gles3/shader_gles3.h
Rémi Verschelde 1426cd3b3a
One Copyright Update to rule them all 
As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.

It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).

We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).

Also fixed "cf." Frenchism - it's meant as "refer to / see".

Backported from #70885.
2023-01-10 15:26:54 +01:00

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/**************************************************************************/
/* shader_gles3.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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_GLES3_H
#define SHADER_GLES3_H
#include "core/hash_map.h"
#include "core/local_vector.h"
#include "core/map.h"
#include "core/math/camera_matrix.h"
#include "core/safe_refcount.h"
#include "core/self_list.h"
#include "core/variant.h"
#include "platform_config.h"
#ifndef GLES3_INCLUDE_H
#include <GLES3/gl3.h>
#else
#include GLES3_INCLUDE_H
#endif
#include <stdio.h>
template <class K>
class ThreadedCallableQueue;
class ShaderCacheGLES3;
class ShaderGLES3 {
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;
};
struct UBOPair {
const char *name;
int index;
};
struct Feedback {
const char *name;
int conditional;
};
virtual int get_ubershader_flags_uniform() const { return -1; }
private:
//@TODO Optimize to a fixed set of shader pools and use a LRU
int uniform_count;
int texunit_pair_count;
int conditional_count;
int ubo_count;
int feedback_count;
int vertex_code_start;
int fragment_code_start;
int attribute_pair_count;
public:
enum AsyncMode {
ASYNC_MODE_VISIBLE,
ASYNC_MODE_HIDDEN,
};
private:
struct CustomCode {
String vertex;
String vertex_globals;
String fragment;
String fragment_globals;
String light;
String uniforms;
AsyncMode async_mode;
uint32_t version;
Vector<StringName> texture_uniforms;
Vector<CharString> custom_defines;
Set<uint32_t> versions;
};
public:
static ShaderCacheGLES3 *shader_cache;
static ThreadedCallableQueue<GLuint> *cache_write_queue;
static ThreadedCallableQueue<GLuint> *compile_queue; // Non-null if using queued asynchronous compilation (via secondary context)
static bool parallel_compile_supported; // True if using natively supported asyncrhonous compilation
static bool async_hidden_forbidden;
static uint32_t *compiles_started_this_frame;
static uint32_t *max_frame_compiles_in_progress;
static uint32_t max_simultaneous_compiles;
static uint32_t active_compiles_count;
#ifdef DEBUG_ENABLED
static bool log_active_async_compiles_count;
#endif
static uint64_t current_frame;
static void advance_async_shaders_compilation();
private:
union VersionKey {
static const uint32_t UBERSHADER_FLAG = ((uint32_t)1) << 31;
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; }
VersionKey() {}
VersionKey(uint64_t p_key) :
key(p_key) {}
_FORCE_INLINE_ bool is_subject_to_caching() const { return (version & UBERSHADER_FLAG); }
};
struct Version {
VersionKey version_key;
// Set by the render thread upfront; the compile thread (for queued async.) reads them
struct Ids {
GLuint main;
GLuint vert;
GLuint frag;
} ids;
ShaderGLES3 *shader;
uint32_t code_version;
AsyncMode async_mode;
GLint *uniform_location;
Vector<GLint> texture_uniform_locations;
bool uniforms_ready;
uint64_t last_frame_processed;
enum CompileStatus {
COMPILE_STATUS_PENDING,
COMPILE_STATUS_SOURCE_PROVIDED,
COMPILE_STATUS_COMPILING_VERTEX,
COMPILE_STATUS_COMPILING_FRAGMENT,
COMPILE_STATUS_COMPILING_VERTEX_AND_FRAGMENT,
COMPILE_STATUS_PROCESSING_AT_QUEUE,
COMPILE_STATUS_BINARY_READY,
COMPILE_STATUS_BINARY_READY_FROM_CACHE,
COMPILE_STATUS_LINKING,
COMPILE_STATUS_ERROR,
COMPILE_STATUS_RESTART_NEEDED,
COMPILE_STATUS_OK,
};
CompileStatus compile_status;
SelfList<Version> compiling_list;
struct ProgramBinary {
String cache_hash;
enum Source {
SOURCE_NONE,
SOURCE_LOCAL, // Binary data will only be available if cache enabled
SOURCE_QUEUE,
SOURCE_CACHE,
} source;
// Shared with the compile thread (for queued async.); otherwise render thread only
GLenum format;
PoolByteArray data;
SafeNumeric<int> result_from_queue;
} program_binary;
Version() :
version_key(0),
ids(),
shader(nullptr),
code_version(0),
async_mode(ASYNC_MODE_VISIBLE),
uniform_location(nullptr),
uniforms_ready(false),
last_frame_processed(UINT64_MAX),
compile_status(COMPILE_STATUS_PENDING),
compiling_list(this),
program_binary() {}
};
static SelfList<Version>::List versions_compiling;
Version *version;
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 UBOPair *ubo_pairs;
const Feedback *feedbacks;
const char *vertex_code;
const char *fragment_code;
CharString fragment_code0;
CharString fragment_code1;
CharString fragment_code2;
CharString fragment_code3;
CharString fragment_code4;
CharString vertex_code0;
CharString vertex_code1;
CharString vertex_code2;
CharString vertex_code3;
Vector<CharString> custom_defines;
int base_material_tex_index;
Version *get_current_version(bool &r_async_forbidden);
// These will run on the shader compile thread if using que compile queue approach to async.
void _set_source(Version::Ids p_ids, const LocalVector<const char *> &p_vertex_strings, const LocalVector<const char *> &p_fragment_strings) const;
bool _complete_compile(Version::Ids p_ids, bool p_retrievable) const;
bool _complete_link(Version::Ids p_ids, GLenum *r_program_format = nullptr, PoolByteArray *r_program_binary = nullptr) const;
// ---
static void _log_active_compiles();
static bool _process_program_state(Version *p_version, bool p_async_forbidden);
void _setup_uniforms(CustomCode *p_cc) const;
void _dispose_program(Version *p_version);
static ShaderGLES3 *active;
int max_image_units;
_FORCE_INLINE_ void _set_uniform_variant(GLint p_uniform, const Variant &p_value) {
if (p_uniform < 0) {
return; // do none
}
switch (p_value.get_type()) {
case Variant::BOOL:
case Variant::INT: {
int val = p_value;
glUniform1i(p_uniform, val);
} break;
case Variant::REAL: {
real_t val = p_value;
glUniform1f(p_uniform, val);
} break;
case Variant::COLOR: {
Color val = p_value;
glUniform4f(p_uniform, val.r, val.g, val.b, val.a);
} break;
case Variant::VECTOR2: {
Vector2 val = p_value;
glUniform2f(p_uniform, val.x, val.y);
} break;
case Variant::VECTOR3: {
Vector3 val = p_value;
glUniform3f(p_uniform, val.x, val.y, val.z);
} break;
case Variant::PLANE: {
Plane val = p_value;
glUniform4f(p_uniform, val.normal.x, val.normal.y, val.normal.z, val.d);
} break;
case Variant::QUAT: {
Quat val = p_value;
glUniform4f(p_uniform, val.x, val.y, val.z, val.w);
} break;
case Variant::TRANSFORM2D: {
Transform2D tr = p_value;
GLfloat matrix[16] = { /* build a 16x16 matrix */
tr.elements[0][0],
tr.elements[0][1],
0,
0,
tr.elements[1][0],
tr.elements[1][1],
0,
0,
0,
0,
1,
0,
tr.elements[2][0],
tr.elements[2][1],
0,
1
};
glUniformMatrix4fv(p_uniform, 1, false, matrix);
} break;
case Variant::BASIS:
case Variant::TRANSFORM: {
Transform tr = p_value;
GLfloat matrix[16] = { /* build a 16x16 matrix */
tr.basis.elements[0][0],
tr.basis.elements[1][0],
tr.basis.elements[2][0],
0,
tr.basis.elements[0][1],
tr.basis.elements[1][1],
tr.basis.elements[2][1],
0,
tr.basis.elements[0][2],
tr.basis.elements[1][2],
tr.basis.elements[2][2],
0,
tr.origin.x,
tr.origin.y,
tr.origin.z,
1
};
glUniformMatrix4fv(p_uniform, 1, false, matrix);
} break;
default: {
ERR_FAIL();
} // do nothing
}
}
bool _bind(bool p_binding_fallback);
bool _bind_ubershader(bool p_for_warmrup = false);
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 UBOPair *p_ubo_pairs, int p_ubo_pair_count, const Feedback *p_feedback, int p_feedback_count, const char *p_vertex_code, const char *p_fragment_code, int p_vertex_code_start, int p_fragment_code_start);
ShaderGLES3();
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_ ShaderGLES3 *get_active() { return active; };
bool bind();
void unbind();
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 String &p_uniforms, const Vector<StringName> &p_texture_uniforms, const Vector<CharString> &p_custom_defines, AsyncMode p_async_mode);
void set_custom_shader(uint32_t p_code_id);
void free_custom_shader(uint32_t p_code_id);
bool is_custom_code_ready_for_render(uint32_t p_code_id);
uint32_t get_version() const { return new_conditional_version.version; }
_FORCE_INLINE_ bool is_version_valid() const { return version && version->compile_status == Version::COMPILE_STATUS_OK; }
virtual void init() = 0;
void init_async_compilation();
bool is_async_compilation_supported();
void finish();
void set_base_material_tex_index(int p_idx);
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 ~ShaderGLES3();
};
// called a lot, made inline
int ShaderGLES3::_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 ShaderGLES3::_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 // SHADER_GLES3_H
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