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use strings;
use types::c;
use trace;
use gl::*;
fn debug_callback(
source: gl_enum,
type_: gl_enum,
id: uint,
severity: gl_enum,
length: i32,
message: nullable *const c::char,
user_data: nullable *opaque,
) void = {
// (2024 note): I'm painfully aware of the data race present here:
// The GL driver can call this from another thread, and the stdlib has
// some non-thread-safe stuff in it that we use, in particular strconv.
// I've seen it happen at times, but it's pretty rare.
const message = (message: *const [*]u8)[..length];
const message = strings::fromutf8(message)!;
const message = strings::trimsuffix(message, "\n");
trace::debug(&trace::root, "gl: {}", message);
};
export fn init_debug_logging() void = {
let ctxflags = 0i32;
glGetIntegerv(GL_CONTEXT_FLAGS, &ctxflags);
if (ctxflags & GL_CONTEXT_FLAG_DEBUG_BIT: i32 != 0) {
trace::info(&trace::root, "opengl debugging is enabled");
glDebugMessageCallback(&debug_callback, null);
};
};
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