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use CreationError;
use GlAttributes;
use GlProfile;
use GlRequest;
use PixelFormatRequirements;
use ReleaseBehavior;
use cocoa::foundation::NSAutoreleasePool;
use cocoa::appkit::*;
pub fn build_nsattributes<T>(pf_reqs: &PixelFormatRequirements, opengl: &GlAttributes<&T>)
-> Result<Vec<u32>, CreationError> {
let profile = match (opengl.version, opengl.version.to_gl_version(), opengl.profile) {
// Note: we are not using ranges because of a rust bug that should be fixed here:
// https://github.com/rust-lang/rust/pull/27050
(GlRequest::Latest, _, Some(GlProfile::Compatibility)) => NSOpenGLProfileVersionLegacy as u32,
(GlRequest::Latest, _, _) => {
if NSAppKitVersionNumber.floor() >= NSAppKitVersionNumber10_9 {
NSOpenGLProfileVersion4_1Core as u32
} else if NSAppKitVersionNumber.floor() >= NSAppKitVersionNumber10_7 {
NSOpenGLProfileVersion3_2Core as u32
} else {
NSOpenGLProfileVersionLegacy as u32
}
},
(_, Some((1, _)), _) => NSOpenGLProfileVersionLegacy as u32,
(_, Some((2, _)), _) => NSOpenGLProfileVersionLegacy as u32,
(_, Some((3, 0)), _) => NSOpenGLProfileVersionLegacy as u32,
(_, Some((3, 1)), _) => NSOpenGLProfileVersionLegacy as u32,
(_, Some((3, 2)), _) => NSOpenGLProfileVersion3_2Core as u32,
(_, Some((3, _)), Some(GlProfile::Compatibility)) => return Err(CreationError::OpenGlVersionNotSupported),
(_, Some((3, _)), _) => NSOpenGLProfileVersion4_1Core as u32,
(_, Some((4, _)), Some(GlProfile::Compatibility)) => return Err(CreationError::OpenGlVersionNotSupported),
(_, Some((4, _)), _) => NSOpenGLProfileVersion4_1Core as u32,
_ => return Err(CreationError::OpenGlVersionNotSupported),
};
// NOTE: OS X no longer has the concept of setting individual
// color component's bit size. Instead we can only specify the
// full color size and hope for the best. Another hiccup is that
// `NSOpenGLPFAColorSize` also includes `NSOpenGLPFAAlphaSize`,
// so we have to account for that as well.
let alpha_depth = pf_reqs.alpha_bits.unwrap_or(8);
let color_depth = pf_reqs.color_bits.unwrap_or(24) + alpha_depth;
// TODO: handle hardware_accelerated parameter of pf_reqs
let mut attributes = vec![
NSOpenGLPFADoubleBuffer as u32,
NSOpenGLPFAClosestPolicy as u32,
NSOpenGLPFAColorSize as u32, color_depth as u32,
NSOpenGLPFAAlphaSize as u32, alpha_depth as u32,
NSOpenGLPFADepthSize as u32, pf_reqs.depth_bits.unwrap_or(24) as u32,
NSOpenGLPFAStencilSize as u32, pf_reqs.stencil_bits.unwrap_or(8) as u32,
NSOpenGLPFAOpenGLProfile as u32, profile,
];
if pf_reqs.release_behavior != ReleaseBehavior::Flush {
return Err(CreationError::NoAvailablePixelFormat);
}
if pf_reqs.stereoscopy {
unimplemented!(); // TODO:
}
if pf_reqs.double_buffer == Some(false) {
unimplemented!(); // TODO:
}
if pf_reqs.float_color_buffer {
attributes.push(NSOpenGLPFAColorFloat as u32);
}
pf_reqs.multisampling.map(|samples| {
attributes.push(NSOpenGLPFAMultisample as u32);
attributes.push(NSOpenGLPFASampleBuffers as u32); attributes.push(1);
attributes.push(NSOpenGLPFASamples as u32); attributes.push(samples as u32);
});
// attribute list must be null terminated.
attributes.push(0);
Ok(attributes)
}
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