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Add support for the EGL_KHR_create_context_no_error extension

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This commit is contained in:
Pierre Krieger 2015-06-25 09:34:33 +02:00
parent 1c6fb9daae
commit bff79c02ce
6 changed files with 70 additions and 24 deletions
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2
Cargo.toml
View file

@ -22,7 +22,7 @@ shared_library = "0.1.0"
[build-dependencies]
gl_generator = "0.0.26"
khronos_api = "0.0.5"
khronos_api = "0.0.6"
[dev-dependencies]
clock_ticks = "0.0.5"

6
build.rs
View file

@ -45,6 +45,7 @@ fn main() {
vec![
"EGL_KHR_create_context".to_string(),
"EGL_EXT_create_context_robustness".to_string(),
"EGL_KHR_create_context_no_error".to_string(),
],
"1.5", "core", &mut file).unwrap();
}
@ -81,6 +82,7 @@ fn main() {
vec![
"EGL_KHR_create_context".to_string(),
"EGL_EXT_create_context_robustness".to_string(),
"EGL_KHR_create_context_no_error".to_string(),
],
"1.5", "core", &mut file).unwrap();
}
@ -92,7 +94,9 @@ fn main() {
gl_generator::Fallbacks::All,
khronos_api::EGL_XML,
vec![
"EGL_KHR_create_context".to_string()
"EGL_KHR_create_context".to_string(),
"EGL_EXT_create_context_robustness".to_string(),
"EGL_KHR_create_context_no_error".to_string(),
],
"1.5", "core", &mut file).unwrap();
}

63
src/api/egl/mod.rs
View file

@ -349,7 +349,7 @@ unsafe fn create_context(egl: &ffi::egl::Egl, display: ffi::egl::types::EGLDispl
format!("")
};
let mut context_attributes = vec![];
let mut context_attributes = Vec::with_capacity(10);
let mut flags = 0;
if egl_version >= &(1, 5) ||
@ -361,30 +361,62 @@ unsafe fn create_context(egl: &ffi::egl::Egl, display: ffi::egl::types::EGLDispl
context_attributes.push(ffi::egl::CONTEXT_MINOR_VERSION as i32);
context_attributes.push(version.1 as i32);
if egl_version >= &(1, 5) ||
// handling robustness
let supports_robustness = egl_version >= &(1, 5) ||
extensions.contains("EGL_EXT_create_context_robustness ") ||
extensions.ends_with("EGL_EXT_create_context_robustness")
{
extensions.ends_with("EGL_EXT_create_context_robustness");
match gl_robustness {
Robustness::RobustNoResetNotification | Robustness::TryRobustNoResetNotification => {
context_attributes.push(ffi::egl::CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY as libc::c_int);
Robustness::NotRobust => (),
Robustness::NoError => {
if extensions.contains("EGL_KHR_create_context_no_error ") ||
extensions.ends_with("EGL_KHR_create_context_no_error")
{
context_attributes.push(ffi::egl::CONTEXT_OPENGL_NO_ERROR_KHR as libc::c_int);
context_attributes.push(1);
}
},
Robustness::RobustNoResetNotification => {
if supports_robustness {
context_attributes.push(ffi::egl::CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY
as libc::c_int);
context_attributes.push(ffi::egl::NO_RESET_NOTIFICATION as libc::c_int);
flags = flags | ffi::egl::CONTEXT_OPENGL_ROBUST_ACCESS as libc::c_int;
} else {
return Err(CreationError::NotSupported);
}
},
Robustness::RobustLoseContextOnReset | Robustness::TryRobustLoseContextOnReset => {
context_attributes.push(ffi::egl::CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY as libc::c_int);
Robustness::TryRobustNoResetNotification => {
if supports_robustness {
context_attributes.push(ffi::egl::CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY
as libc::c_int);
context_attributes.push(ffi::egl::NO_RESET_NOTIFICATION as libc::c_int);
flags = flags | ffi::egl::CONTEXT_OPENGL_ROBUST_ACCESS as libc::c_int;
}
},
Robustness::RobustLoseContextOnReset => {
if supports_robustness {
context_attributes.push(ffi::egl::CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY
as libc::c_int);
context_attributes.push(ffi::egl::LOSE_CONTEXT_ON_RESET as libc::c_int);
flags = flags | ffi::egl::CONTEXT_OPENGL_ROBUST_ACCESS as libc::c_int;
},
Robustness::NotRobust => ()
}
} else {
match gl_robustness {
Robustness::RobustNoResetNotification | Robustness::RobustLoseContextOnReset => {
return Err(CreationError::NotSupported);
},
_ => ()
}
},
Robustness::TryRobustLoseContextOnReset => {
if supports_robustness {
context_attributes.push(ffi::egl::CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY
as libc::c_int);
context_attributes.push(ffi::egl::LOSE_CONTEXT_ON_RESET as libc::c_int);
flags = flags | ffi::egl::CONTEXT_OPENGL_ROBUST_ACCESS as libc::c_int;
}
},
}
if gl_debug {
@ -400,6 +432,7 @@ unsafe fn create_context(egl: &ffi::egl::Egl, display: ffi::egl::types::EGLDispl
context_attributes.push(flags);
} else if egl_version >= &(1, 3) && api == Api::OpenGlEs {
// robustness is not supported
match gl_robustness {
Robustness::RobustNoResetNotification | Robustness::RobustLoseContextOnReset => {
return Err(CreationError::NotSupported);

3
src/api/glx/mod.rs
View file

@ -246,7 +246,8 @@ fn create_context(glx: &ffi::glx::Glx, extra_functions: &ffi::glx_extra::Glx, ex
attributes.push(ffi::glx_extra::LOSE_CONTEXT_ON_RESET_ARB as libc::c_int);
flags = flags | ffi::glx_extra::CONTEXT_ROBUST_ACCESS_BIT_ARB as libc::c_int;
},
Robustness::NotRobust => ()
Robustness::NotRobust => (),
Robustness::NoError => (),
}
} else {
match robustness {

3
src/api/wgl/mod.rs
View file

@ -283,7 +283,8 @@ unsafe fn create_context(extra: Option<(&gl::wgl_extra::Wgl, &BuilderAttribs<'st
attributes.push(gl::wgl_extra::LOSE_CONTEXT_ON_RESET_ARB as libc::c_int);
flags = flags | gl::wgl_extra::CONTEXT_ROBUST_ACCESS_BIT_ARB as libc::c_int;
},
Robustness::NotRobust => ()
Robustness::NotRobust => (),
Robustness::NoError => (),
}
} else {
match builder.gl_robustness {

7
src/lib.rs
View file

@ -205,6 +205,13 @@ pub enum Robustness {
/// shaders.
NotRobust,
/// The driver doesn't check anything. This option is very dangerous. Please know what you're
/// doing before using it. See the `GL_KHR_no_error` extension.
///
/// Since this option is purely an optimisation, no error will be returned if the backend
/// doesn't support it. Instead it will automatically fall back to `NotRobust`.
NoError,
/// Everything is checked to avoid any crash. The driver will attempt to avoid any problem,
/// but if a problem occurs the behavior is implementation-defined. You are just guaranteed not
/// to get a crash.