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const std = @import("std");
const c = @import("c.zig").c;
const errors = @import("errors.zig");
const glad = @import("glad.zig");
/// Returns the number of extensions.
pub fn len() !u32 {
var n: c.GLint = undefined;
glad.context.GetIntegerv.?(c.GL_NUM_EXTENSIONS, &n);
try errors.getError();
return @intCast(n);
}
/// Returns an iterator for the extensions.
pub fn iterator() !Iterator {
return Iterator{ .len = try len() };
}
/// Iterator for the available extensions.
pub const Iterator = struct {
/// The total number of extensions.
len: c.GLuint = 0,
i: c.GLuint = 0,
pub fn next(self: *Iterator) !?[]const u8 {
if (self.i >= self.len) return null;
const res = glad.context.GetStringi.?(c.GL_EXTENSIONS, self.i);
try errors.getError();
self.i += 1;
return std.mem.sliceTo(res, 0);
}
};
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