77 std::vector<EGLint> attributes;
80 attributes.push_back(EGL_RENDERABLE_TYPE);
83 attributes.push_back(EGL_OPENGL_BIT);
86 attributes.push_back(EGL_OPENGL_ES2_BIT);
89 attributes.push_back(EGL_OPENGL_ES3_BIT);
95 attributes.push_back(EGL_SURFACE_TYPE);
96 switch (config.surface_type) {
98 attributes.push_back(EGL_WINDOW_BIT);
101 attributes.push_back(EGL_PBUFFER_BIT);
107 switch (config.color_format) {
109 attributes.push_back(EGL_RED_SIZE);
110 attributes.push_back(8);
111 attributes.push_back(EGL_GREEN_SIZE);
112 attributes.push_back(8);
113 attributes.push_back(EGL_BLUE_SIZE);
114 attributes.push_back(8);
115 attributes.push_back(EGL_ALPHA_SIZE);
116 attributes.push_back(8);
119 attributes.push_back(EGL_RED_SIZE);
120 attributes.push_back(5);
121 attributes.push_back(EGL_GREEN_SIZE);
122 attributes.push_back(6);
123 attributes.push_back(EGL_BLUE_SIZE);
124 attributes.push_back(5);
130 attributes.push_back(EGL_DEPTH_SIZE);
131 attributes.push_back(
static_cast<EGLint
>(config.depth_bits));
135 attributes.push_back(EGL_STENCIL_SIZE);
136 attributes.push_back(
static_cast<EGLint
>(config.stencil_bits));
140 const auto sample_count =
static_cast<EGLint
>(config.samples);
141 if (sample_count > 1) {
142 attributes.push_back(EGL_SAMPLE_BUFFERS);
143 attributes.push_back(1);
144 attributes.push_back(EGL_SAMPLES);
145 attributes.push_back(sample_count);
150 attributes.push_back(EGL_NONE);
152 EGLConfig config_out =
nullptr;
153 EGLint config_count_out = 0;
154 if (::eglChooseConfig(display_,
164 if (config_count_out != 1u) {
169 return std::make_unique<Config>(config, config_out);