1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/*************************************************************************/
/* shader_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 SHADER_OPENGL_H
#define SHADER_OPENGL_H
#include "core/os/mutex.h"
#include "core/string/string_builder.h"
#include "core/templates/hash_map.h"
#include "core/templates/local_vector.h"
#include "core/templates/map.h"
#include "core/templates/rid_owner.h"
#include "core/variant/variant.h"
#include "servers/rendering_server.h"
#ifdef GLES3_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 <stdio.h>
class ShaderGLES3 {
protected:
struct TexUnitPair {
const char *name;
int index;
};
struct UBOPair {
const char *name;
int index;
};
struct Specialization {
const char *name;
bool default_value = false;
};
private:
//versions
CharString general_defines;
// A version is a high-level construct which is a combination of built-in and user-defined shader code
// Variants use #idefs to toggle behaviour on and off to change behaviour of the shader
// Specializations use #ifdefs to toggle behaviour on and off for performance, on supporting hardware, they will compile a version with everything enabled, and then compile more copies to improve performance
// Use specializations to enable and disabled advanced features, use variants to toggle behaviour when different data may be used (e.g. using a samplerArray vs a sampler)
struct Version {
Vector<StringName> texture_uniforms;
CharString uniforms;
CharString vertex_globals;
CharString fragment_globals;
Map<StringName, CharString> code_sections;
Vector<CharString> custom_defines;
struct Specialization {
GLuint id;
GLuint vert_id;
GLuint frag_id;
LocalVector<GLint> uniform_location;
LocalVector<GLint> texture_uniform_locations;
Map<StringName, GLint> custom_uniform_locations;
bool build_queued = false;
bool ok = false;
Specialization() {
id = 0;
vert_id = 0;
frag_id = 0;
}
};
LocalVector<OAHashMap<uint64_t, Specialization>> variants;
};
Mutex variant_set_mutex;
void _compile_specialization(Version::Specialization &spec, uint32_t p_variant, Version *p_version, uint64_t p_specialization);
void _clear_version(Version *p_version);
void _initialize_version(Version *p_version);
RID_Owner<Version, true> version_owner;
struct StageTemplate {
struct Chunk {
enum Type {
TYPE_MATERIAL_UNIFORMS,
TYPE_VERTEX_GLOBALS,
TYPE_FRAGMENT_GLOBALS,
TYPE_CODE,
TYPE_TEXT
};
Type type;
StringName code;
CharString text;
};
LocalVector<Chunk> chunks;
};
String name;
String base_sha256;
static String shader_cache_dir;
static bool shader_cache_cleanup_on_start;
static bool shader_cache_save_compressed;
static bool shader_cache_save_compressed_zstd;
static bool shader_cache_save_debug;
bool shader_cache_dir_valid = false;
GLint max_image_units = 0;
enum StageType {
STAGE_TYPE_VERTEX,
STAGE_TYPE_FRAGMENT,
STAGE_TYPE_MAX,
};
StageTemplate stage_templates[STAGE_TYPE_MAX];
void _build_variant_code(StringBuilder &p_builder, uint32_t p_variant, const Version *p_version, const StageTemplate &p_template, uint64_t p_specialization);
void _add_stage(const char *p_code, StageType p_stage_type);
String _version_get_sha1(Version *p_version) const;
bool _load_from_cache(Version *p_version);
void _save_to_cache(Version *p_version);
const char **uniform_names = nullptr;
int uniform_count = 0;
const UBOPair *ubo_pairs = nullptr;
int ubo_count = 0;
const TexUnitPair *texunit_pairs = nullptr;
int texunit_pair_count = 0;
int specialization_count = 0;
const Specialization *specializations = nullptr;
uint64_t specialization_default_mask = 0;
const char **variant_defines = nullptr;
int variant_count = 0;
int base_texture_index = 0;
Version::Specialization *current_shader = nullptr;
protected:
ShaderGLES3();
void _setup(const char *p_vertex_code, const char *p_fragment_code, const char *p_name, int p_uniform_count, const char **p_uniform_names, int p_ubo_count, const UBOPair *p_ubos, int p_texture_count, const TexUnitPair *p_tex_units, int p_specialization_count, const Specialization *p_specializations, int p_variant_count, const char **p_variants);
_FORCE_INLINE_ void _version_bind_shader(RID p_version, int p_variant, uint64_t p_specialization) {
ERR_FAIL_INDEX(p_variant, variant_count);
Version *version = version_owner.get_or_null(p_version);
ERR_FAIL_COND(!version);
if (version->variants.size() == 0) {
_initialize_version(version); //may lack initialization
}
Version::Specialization *spec = version->variants[p_variant].lookup_ptr(p_specialization);
if (!spec) {
if (false) {
// Queue load this specialization and use defaults in the meantime (TODO)
spec = version->variants[p_variant].lookup_ptr(specialization_default_mask);
} else {
// Compile on the spot
Version::Specialization s;
_compile_specialization(s, p_variant, version, p_specialization);
version->variants[p_variant].insert(p_specialization, s);
spec = version->variants[p_variant].lookup_ptr(p_specialization);
}
} else if (spec->build_queued) {
// Still queued, wait
spec = version->variants[p_variant].lookup_ptr(specialization_default_mask);
}
ERR_FAIL_COND(!spec); // Should never happen
ERR_FAIL_COND(!spec->ok); // Should never happen
glUseProgram(spec->id);
current_shader = spec;
}
_FORCE_INLINE_ int _version_get_uniform(int p_which, RID p_version, int p_variant, uint64_t p_specialization) {
ERR_FAIL_INDEX_V(p_which, uniform_count, -1);
Version *version = version_owner.get_or_null(p_version);
ERR_FAIL_COND_V(!version, -1);
return version->variants[p_variant].lookup_ptr(p_specialization)->uniform_location[p_which];
}
virtual void _init() = 0;
public:
RID version_create();
void version_set_code(RID p_version, const Map<String, String> &p_code, const String &p_uniforms, const String &p_vertex_globals, const String &p_fragment_globals, const Vector<String> &p_custom_defines, const Vector<StringName> &p_texture_uniforms, bool p_initialize = false);
bool version_is_valid(RID p_version);
bool version_free(RID p_version);
static void set_shader_cache_dir(const String &p_dir);
static void set_shader_cache_save_compressed(bool p_enable);
static void set_shader_cache_save_compressed_zstd(bool p_enable);
static void set_shader_cache_save_debug(bool p_enable);
RS::ShaderNativeSourceCode version_get_native_source_code(RID p_version);
void initialize(const String &p_general_defines = "", int p_base_texture_index = 0);
virtual ~ShaderGLES3();
};
#endif // SHADER_OPENGL_H
#endif
|