1//
2// Copyright 2017 The ANGLE Project Authors. All rights reserved.
3// Use of this source code is governed by a BSD-style license that can be
4// found in the LICENSE file.
5//
6// ExtensionBehavior.cpp: Extension name enumeration and data structures for storing extension
7// behavior.
8
9#include "compiler/translator/ExtensionBehavior.h"
10
11#include "common/debug.h"
12
13#include <string.h>
14
15// clang-format off
16// Extension Name, Min ESSL Version, Max ESSL Version
17//
18// Note that OES_EGL_image_external and OES_texture_3D are ESSL 100 only extensions, but one app has
19// been found that uses them on GLSL 310. http://issuetracker.google.com/285871779
20#define LIST_EXTENSIONS(OP) \
21 OP(ANDROID_extension_pack_es31a, 310, 320) \
22 OP(ANGLE_base_vertex_base_instance_shader_builtin, 300, 320) \
23 OP(ANGLE_clip_cull_distance, 300, 320) \
24 OP(ANGLE_multi_draw, 100, 320) \
25 OP(ANGLE_shader_pixel_local_storage, 300, 320) \
26 OP(ANGLE_texture_multisample, 300, 320) \
27 OP(APPLE_clip_distance, 100, 320) \
28 OP(ARB_texture_rectangle, 100, 320) \
29 OP(ARM_shader_framebuffer_fetch, 100, 320) \
30 OP(EXT_blend_func_extended, 100, 320) \
31 OP(EXT_clip_cull_distance, 300, 320) \
32 OP(EXT_conservative_depth, 300, 320) \
33 OP(EXT_draw_buffers, 100, 100) \
34 OP(EXT_frag_depth, 100, 100) \
35 OP(EXT_geometry_shader, 310, 320) \
36 OP(OES_geometry_shader, 310, 320) \
37 OP(OES_shader_io_blocks, 310, 320) \
38 OP(EXT_shader_io_blocks, 310, 320) \
39 OP(EXT_gpu_shader5, 310, 320) \
40 OP(EXT_primitive_bounding_box, 310, 320) \
41 OP(OES_primitive_bounding_box, 310, 320) \
42 OP(EXT_separate_shader_objects, 100, 320) \
43 OP(EXT_shader_framebuffer_fetch, 100, 320) \
44 OP(EXT_shader_framebuffer_fetch_non_coherent, 100, 320) \
45 OP(EXT_shader_non_constant_global_initializers, 100, 320) \
46 OP(EXT_shader_texture_lod, 100, 100) \
47 OP(EXT_shadow_samplers, 100, 100) \
48 OP(EXT_tessellation_shader, 310, 320) \
49 OP(EXT_texture_buffer, 310, 320) \
50 OP(EXT_texture_cube_map_array, 310, 320) \
51 OP(EXT_YUV_target, 300, 320) \
52 OP(KHR_blend_equation_advanced, 100, 320) \
53 OP(NV_EGL_stream_consumer_external, 100, 320) \
54 OP(NV_shader_framebuffer_fetch, 100, 100) \
55 OP(NV_shader_noperspective_interpolation, 300, 320) \
56 OP(OES_EGL_image_external, 100, 310) \
57 OP(OES_EGL_image_external_essl3, 300, 320) \
58 OP(OES_sample_variables, 300, 320) \
59 OP(OES_shader_multisample_interpolation, 300, 320) \
60 OP(OES_shader_image_atomic, 310, 320) \
61 OP(OES_standard_derivatives, 100, 100) \
62 OP(OES_texture_3D, 100, 310) \
63 OP(OES_texture_buffer, 310, 320) \
64 OP(OES_texture_cube_map_array, 310, 320) \
65 OP(OES_texture_storage_multisample_2d_array, 310, 320) \
66 OP(OVR_multiview, 300, 320) \
67 OP(OVR_multiview2, 300, 320) \
68 OP(WEBGL_video_texture, 100, 320)
69// clang-format on
70
71namespace sh
72{
73
74#define RETURN_EXTENSION_NAME_CASE(ext, min_version, max_version) \
75 case TExtension::ext: \
76 return "GL_" #ext;
77
78const char *GetExtensionNameString(TExtension extension)
79{
80 switch (extension)
81 {
82 LIST_EXTENSIONS(RETURN_EXTENSION_NAME_CASE)
83 default:
84 UNREACHABLE();
85 return "";
86 }
87}
88
89#define RETURN_EXTENSION_IF_NAME_MATCHES(ext, min_version, max_version) \
90 if (strcmp(extWithoutGLPrefix, #ext) == 0) \
91 { \
92 return TExtension::ext; \
93 }
94
95TExtension GetExtensionByName(const char *extension)
96{
97 // If first characters of the extension don't equal "GL_", early out.
98 if (strncmp(s1: extension, s2: "GL_", n: 3) != 0)
99 {
100 return TExtension::UNDEFINED;
101 }
102 const char *extWithoutGLPrefix = extension + 3;
103
104 LIST_EXTENSIONS(RETURN_EXTENSION_IF_NAME_MATCHES)
105
106 return TExtension::UNDEFINED;
107}
108
109#define RETURN_VERSION_CHECK(ext, min_version, max_version) \
110 case TExtension::ext: \
111 return (version >= min_version) && (version <= max_version);
112
113bool CheckExtensionVersion(TExtension extension, int version)
114{
115 switch (extension)
116 {
117 LIST_EXTENSIONS(RETURN_VERSION_CHECK)
118 default:
119 UNREACHABLE();
120 return false;
121 }
122}
123
124const char *GetBehaviorString(TBehavior b)
125{
126 switch (b)
127 {
128 case EBhRequire:
129 return "require";
130 case EBhEnable:
131 return "enable";
132 case EBhWarn:
133 return "warn";
134 case EBhDisable:
135 return "disable";
136 default:
137 return nullptr;
138 }
139}
140
141bool IsExtensionEnabled(const TExtensionBehavior &extBehavior, TExtension extension)
142{
143 ASSERT(extension != TExtension::UNDEFINED);
144 auto iter = extBehavior.find(k: extension);
145 return iter != extBehavior.end() &&
146 (iter->second == EBhEnable || iter->second == EBhRequire || iter->second == EBhWarn);
147}
148
149} // namespace sh
150

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source code of flutter_engine/third_party/angle/src/compiler/translator/ExtensionBehavior.cpp