1 /*
2 * Copyright (C) 2021 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "host/libs/graphics_detector/gles.h"
18
19 #include <android-base/logging.h>
20 #include <android-base/strings.h>
21
22 namespace cuttlefish {
23 namespace {
24
25 constexpr const char kGles2Lib[] = "libGLESv2.so";
26
GlDebugCallback(GLenum,GLenum,GLuint,GLenum,GLsizei,const GLchar * message,const void *)27 static void GL_APIENTRY GlDebugCallback(GLenum, GLenum, GLuint, GLenum, GLsizei,
28 const GLchar* message, const void*) {
29 LOG(VERBOSE) << "GlDebugCallback message: " << message;
30 }
31
32 } // namespace
33
Load()34 /*static*/ std::optional<Gles> Gles::Load() {
35 auto lib_opt = Lib::Load(kGles2Lib);
36 if (!lib_opt) {
37 return std::nullopt;
38 }
39
40 Gles gles;
41 gles.lib_ = std::move(*lib_opt);
42
43 #define LOAD_GLES_FUNCTION_POINTER(return_type, function_name, signature, \
44 args) \
45 gles.function_name = reinterpret_cast<return_type(*) signature>( \
46 gles.lib_.GetSymbol(#function_name)); \
47 if (gles.function_name == nullptr) { \
48 gles.function_name = reinterpret_cast<return_type(*) signature>( \
49 gles.lib_.GetSymbol(#function_name)); \
50 } \
51 if (gles.function_name == nullptr) { \
52 gles.function_name = reinterpret_cast<return_type(*) signature>( \
53 gles.lib_.GetSymbol(#function_name "OES")); \
54 } \
55 if (gles.function_name == nullptr) { \
56 gles.function_name = reinterpret_cast<return_type(*) signature>( \
57 gles.lib_.GetSymbol(#function_name "EXT")); \
58 } \
59 if (gles.function_name == nullptr) { \
60 gles.function_name = reinterpret_cast<return_type(*) signature>( \
61 gles.lib_.GetSymbol(#function_name "ARB")); \
62 } \
63 if (gles.function_name == nullptr) { \
64 LOG(VERBOSE) << "Failed to load GLES function: " << #function_name; \
65 } else { \
66 LOG(VERBOSE) << "Loaded GLES function: " << #function_name; \
67 }
68
69 FOR_EACH_GLES_FUNCTION(LOAD_GLES_FUNCTION_POINTER);
70
71 gles.Init();
72
73 return std::move(gles);
74 }
75
LoadFromEgl(Egl * egl)76 /*static*/ std::optional<Gles> Gles::LoadFromEgl(Egl* egl) {
77 auto lib_opt = Lib::Load(kGles2Lib);
78 if (!lib_opt) {
79 return std::nullopt;
80 }
81
82 Gles gles;
83
84 #define LOAD_GLES_FUNCTION_POINTER_FROM_EGL(return_type, function_name, \
85 signature, args) \
86 gles.function_name = reinterpret_cast<return_type(*) signature>( \
87 egl->eglGetProcAddress(#function_name)); \
88 if (gles.function_name == nullptr) { \
89 LOG(VERBOSE) << "Failed to load GLES function: " << #function_name; \
90 } else { \
91 LOG(VERBOSE) << "Loaded GLES function: " << #function_name; \
92 }
93
94 FOR_EACH_GLES_FUNCTION(LOAD_GLES_FUNCTION_POINTER_FROM_EGL);
95
96 gles.Init();
97
98 return std::move(gles);
99 }
100
Init()101 void Gles::Init() {
102 const GLubyte* gles_vendor = glGetString(GL_VENDOR);
103 if (gles_vendor == nullptr) {
104 LOG(FATAL) << "Failed to get GLES vendor";
105 return;
106 }
107 LOG(VERBOSE) << "Found GLES vendor: " << gles_vendor;
108
109 const std::string gles_extensions_str =
110 reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
111 if (gles_extensions_str.empty()) {
112 LOG(FATAL) << "Failed to get GLES extensions";
113 return;
114 }
115 std::vector<std::string> gles_extensions =
116 android::base::Split(gles_extensions_str, " ");
117 std::sort(gles_extensions.begin(), gles_extensions.end());
118 LOG(VERBOSE) << "Found GLES extensions:";
119 for (const std::string& gles_extension : gles_extensions) {
120 LOG(VERBOSE) << gles_extension;
121 }
122 LOG(VERBOSE) << "";
123
124 glEnable(GL_DEBUG_OUTPUT);
125 glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS);
126 glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DEBUG_SEVERITY_HIGH, 0,
127 nullptr, GL_TRUE);
128 glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DEBUG_SEVERITY_MEDIUM, 0,
129 nullptr, GL_TRUE);
130 glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DEBUG_SEVERITY_LOW, 0,
131 nullptr, GL_TRUE);
132 glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE,
133 GL_DEBUG_SEVERITY_NOTIFICATION, 0, nullptr, GL_FALSE);
134 glDebugMessageCallback(&GlDebugCallback, nullptr);
135 }
136
CreateShader(GLenum shader_type,const std::string & shader_source)137 std::optional<GLuint> Gles::CreateShader(GLenum shader_type,
138 const std::string& shader_source) {
139 GLuint shader = glCreateShader(shader_type);
140
141 const char* const shader_source_cstr = shader_source.c_str();
142 glShaderSource(shader, 1, &shader_source_cstr, nullptr);
143 glCompileShader(shader);
144
145 GLint status;
146 glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
147
148 if (status != GL_TRUE) {
149 GLsizei log_length = 0;
150 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &log_length);
151
152 std::vector<char> log(log_length + 1, 0);
153 glGetShaderInfoLog(shader, log_length, nullptr, log.data());
154 LOG(ERROR) << "Failed to compile shader: " << log.data();
155
156 glDeleteShader(shader);
157 return std::nullopt;
158 }
159
160 return shader;
161 }
162
CreateProgram(const std::string & vert_shader_source,const std::string & frag_shader_source)163 std::optional<GLuint> Gles::CreateProgram(
164 const std::string& vert_shader_source,
165 const std::string& frag_shader_source) {
166 auto vert_shader_opt = CreateShader(GL_VERTEX_SHADER, vert_shader_source);
167 if (!vert_shader_opt) {
168 LOG(ERROR) << "Failed to create vert shader.";
169 return std::nullopt;
170 }
171 auto vert_shader = *vert_shader_opt;
172
173 auto frag_shader_opt = CreateShader(GL_FRAGMENT_SHADER, frag_shader_source);
174 if (!frag_shader_opt) {
175 LOG(ERROR) << "Failed to create frag shader.";
176 return std::nullopt;
177 }
178 auto frag_shader = *frag_shader_opt;
179
180 GLuint program = glCreateProgram();
181 glAttachShader(program, vert_shader);
182 glAttachShader(program, frag_shader);
183 glLinkProgram(program);
184
185 GLint status;
186 glGetProgramiv(program, GL_LINK_STATUS, &status);
187
188 if (status != GL_TRUE) {
189 GLsizei log_length = 0;
190 glGetProgramiv(program, GL_INFO_LOG_LENGTH, &log_length);
191
192 std::vector<char> log(log_length + 1, 0);
193 glGetProgramInfoLog(program, log_length, nullptr, log.data());
194 LOG(ERROR) << "Failed to link program: " << log.data();
195
196 glDeleteProgram(program);
197 return std::nullopt;
198 }
199
200 glDeleteShader(vert_shader);
201 glDeleteShader(frag_shader);
202
203 return program;
204 }
205
206 } // namespace cuttlefish
207