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(OES_gpu_shader5, 310, 320) \
41 OP(EXT_primitive_bounding_box, 310, 320) \
42 OP(OES_primitive_bounding_box, 310, 320) \
43 OP(EXT_separate_shader_objects, 100, 320) \
44 OP(EXT_shader_framebuffer_fetch, 100, 320) \
45 OP(EXT_shader_framebuffer_fetch_non_coherent, 100, 320) \
46 OP(EXT_shader_non_constant_global_initializers, 100, 320) \
47 OP(EXT_shader_texture_lod, 100, 100) \
48 OP(EXT_shadow_samplers, 100, 100) \
49 OP(EXT_tessellation_shader, 310, 320) \
50 OP(OES_tessellation_shader, 310, 320) \
51 OP(EXT_texture_buffer, 310, 320) \
52 OP(EXT_texture_cube_map_array, 310, 320) \
53 OP(EXT_YUV_target, 300, 320) \
54 OP(KHR_blend_equation_advanced, 100, 320) \
55 OP(NV_EGL_stream_consumer_external, 100, 320) \
56 OP(NV_shader_framebuffer_fetch, 100, 100) \
57 OP(NV_shader_noperspective_interpolation, 300, 320) \
58 OP(OES_EGL_image_external, 100, 310) \
59 OP(OES_EGL_image_external_essl3, 300, 320) \
60 OP(OES_sample_variables, 300, 320) \
61 OP(OES_shader_multisample_interpolation, 300, 320) \
62 OP(OES_shader_image_atomic, 310, 320) \
63 OP(OES_standard_derivatives, 100, 100) \
64 OP(OES_texture_3D, 100, 310) \
65 OP(OES_texture_buffer, 310, 320) \
66 OP(OES_texture_cube_map_array, 310, 320) \
67 OP(OES_texture_storage_multisample_2d_array, 310, 320) \
68 OP(OVR_multiview, 300, 320) \
69 OP(OVR_multiview2, 300, 320) \
70 OP(WEBGL_video_texture, 100, 320)
71 // clang-format on
72
73 namespace sh
74 {
75
76 #define RETURN_EXTENSION_NAME_CASE(ext, min_version, max_version) \
77 case TExtension::ext: \
78 return "GL_" #ext;
79
GetExtensionNameString(TExtension extension)80 const char *GetExtensionNameString(TExtension extension)
81 {
82 switch (extension)
83 {
84 LIST_EXTENSIONS(RETURN_EXTENSION_NAME_CASE)
85 default:
86 UNREACHABLE();
87 return "";
88 }
89 }
90
91 #define RETURN_EXTENSION_IF_NAME_MATCHES(ext, min_version, max_version) \
92 if (strcmp(extWithoutGLPrefix, #ext) == 0) \
93 { \
94 return TExtension::ext; \
95 }
96
GetExtensionByName(const char * extension)97 TExtension GetExtensionByName(const char *extension)
98 {
99 // If first characters of the extension don't equal "GL_", early out.
100 if (strncmp(extension, "GL_", 3) != 0)
101 {
102 return TExtension::UNDEFINED;
103 }
104 const char *extWithoutGLPrefix = extension + 3;
105
106 LIST_EXTENSIONS(RETURN_EXTENSION_IF_NAME_MATCHES)
107
108 return TExtension::UNDEFINED;
109 }
110
111 #define RETURN_VERSION_CHECK(ext, min_version, max_version) \
112 case TExtension::ext: \
113 return (version >= min_version) && (version <= max_version);
114
CheckExtensionVersion(TExtension extension,int version)115 bool CheckExtensionVersion(TExtension extension, int version)
116 {
117 switch (extension)
118 {
119 LIST_EXTENSIONS(RETURN_VERSION_CHECK)
120 default:
121 UNREACHABLE();
122 return false;
123 }
124 }
125
GetBehaviorString(TBehavior b)126 const char *GetBehaviorString(TBehavior b)
127 {
128 switch (b)
129 {
130 case EBhRequire:
131 return "require";
132 case EBhEnable:
133 return "enable";
134 case EBhWarn:
135 return "warn";
136 case EBhDisable:
137 return "disable";
138 default:
139 return nullptr;
140 }
141 }
142
IsExtensionEnabled(const TExtensionBehavior & extBehavior,TExtension extension)143 bool IsExtensionEnabled(const TExtensionBehavior &extBehavior, TExtension extension)
144 {
145 ASSERT(extension != TExtension::UNDEFINED);
146 auto iter = extBehavior.find(extension);
147 return iter != extBehavior.end() &&
148 (iter->second == EBhEnable || iter->second == EBhRequire || iter->second == EBhWarn);
149 }
150
151 } // namespace sh
152