graphics_context::graphics_context(window & target_window)
{
// Set GL context attributes
auto LE_SDL_GL_SetAttribute = [](SDL_GLattr attrib, int val)->void
{
int set_attrib_res = SDL_GL_SetAttribute(attrib, val);
if(set_attrib_res != 0)
{
log_error(log_scope::ENGINE, "Unable to set attribute {:#x} to value {}: {}",
(int)attrib, val, SDL_GetError());
SDL_ClearError();
throw fatal_construction_exception{};
}
};
int const LE_GL_version_major = 3;
int const LE_GL_version_minor = 2;
LE_SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, LE_GL_version_major);
LE_SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, LE_GL_version_minor);
#ifdef LE_MODERN_OPENGL_ONLY
LE_SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
#else
LE_SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_COMPATIBILITY);
#endif
LE_SDL_GL_SetAttribute(SDL_GL_FRAMEBUFFER_SRGB_CAPABLE, 1);
LE_SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
// Create GL context
p_raw_context = SDL_GL_CreateContext(target_window.get_raw());
if(p_raw_context == nullptr)
{
log_error(log_scope::ENGINE, "Error creating OpenGL context: {}", SDL_GetError());
SDL_ClearError();
throw fatal_construction_exception{};
}
// 1 = v-sync, 0 = no v-sync, -1 = dynamic
SDL_GL_SetSwapInterval(0);
// Check GL context attributes
log_status(log_scope::ENGINE, log_line_seperator);
log_status(log_scope::ENGINE, "OpenGL Context Successfully Created");
log_status(log_scope::ENGINE, "Attributes");
log_status(log_scope::ENGINE, log_line_seperator_sub_1);
int context_attrib_val;
SDL_GL_GetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, &context_attrib_val);
log_status(log_scope::ENGINE, "Major Version: {}", context_attrib_val);
SDL_GL_GetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, &context_attrib_val);
log_status(log_scope::ENGINE, "Minor Version: {}", context_attrib_val);
SDL_GL_GetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, &context_attrib_val);
log_status(log_scope::ENGINE, "Context Profile: {}",
(context_attrib_val == SDL_GL_CONTEXT_PROFILE_CORE) ? "Core" :
(context_attrib_val == SDL_GL_CONTEXT_PROFILE_COMPATIBILITY) ? "Compatibility" :
"unknown");
SDL_GL_GetAttribute(SDL_GL_FRAMEBUFFER_SRGB_CAPABLE, &context_attrib_val);
log_status(log_scope::ENGINE, "Framebuffer sRGB: {}",
(context_attrib_val == 1) ? "Enabled" : "Disabled");
SDL_GL_GetAttribute(SDL_GL_DEPTH_SIZE, &context_attrib_val);
log_status(log_scope::ENGINE, "Framebuffer Depth: {}", context_attrib_val);
context_attrib_val = SDL_GL_GetSwapInterval();
log_status(log_scope::ENGINE, "Swap Interval: {}",
(context_attrib_val == 0) ? "Immediate" :
(context_attrib_val == 1) ? "Synchronized" :
(context_attrib_val == -1) ? "Dynamic" :
"Unknown");
log_status(log_scope::ENGINE, log_line_seperator);
}
