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-rw-r--r--src/api/glx/mod.rs111
1 files changed, 59 insertions, 52 deletions
diff --git a/src/api/glx/mod.rs b/src/api/glx/mod.rs
index bd56d1b..9f3e084 100644
--- a/src/api/glx/mod.rs
+++ b/src/api/glx/mod.rs
@@ -13,6 +13,7 @@ use ReleaseBehavior;
use Robustness;
use libc;
+use libc::c_int;
use std::ffi::{CStr, CString};
use std::{mem, ptr, slice};
@@ -40,10 +41,17 @@ impl Context {
opengl: &'a GlAttributes<&'a Context>, display: *mut ffi::Display)
-> Result<ContextPrototype<'a>, CreationError>
{
+ // loading the list of extensions
+ let extensions = unsafe {
+ let extensions = glx.QueryExtensionsString(display as *mut _, 0); // FIXME: screen number
+ let extensions = CStr::from_ptr(extensions).to_bytes().to_vec();
+ String::from_utf8(extensions).unwrap()
+ };
+
// finding the pixel format we want
- let (fb_config, pixel_format) = {
- let configs = unsafe { try!(enumerate_configs(&glx, xlib, display)) };
- try!(pf_reqs.choose_pixel_format(configs.into_iter()))
+ let (fb_config, pixel_format) = unsafe {
+ try!(choose_fbconfig(&glx, &extensions, xlib, display, pf_reqs)
+ .map_err(|_| CreationError::NoAvailablePixelFormat))
};
// getting the visual infos
@@ -59,6 +67,7 @@ impl Context {
Ok(ContextPrototype {
glx: glx,
+ extensions: extensions,
opengl: opengl,
display: display,
fb_config: fb_config,
@@ -126,6 +135,7 @@ impl Drop for Context {
pub struct ContextPrototype<'a> {
glx: ffi::glx::Glx,
+ extensions: String,
opengl: &'a GlAttributes<&'a Context>,
display: *mut ffi::Display,
fb_config: ffi::glx::types::GLXFBConfig,
@@ -145,13 +155,6 @@ impl<'a> ContextPrototype<'a> {
None => ptr::null()
};
- // loading the list of extensions
- let extensions = unsafe {
- let extensions = self.glx.QueryExtensionsString(self.display as *mut _, 0); // FIXME: screen number
- let extensions = CStr::from_ptr(extensions).to_bytes().to_vec();
- String::from_utf8(extensions).unwrap()
- };
-
// loading the extra GLX functions
let extra_functions = ffi::glx_extra::Glx::load_with(|addr| {
with_c_str(addr, |s| {
@@ -162,13 +165,13 @@ impl<'a> ContextPrototype<'a> {
// creating GL context
let context = match self.opengl.version {
GlRequest::Latest => {
- if let Ok(ctxt) = create_context(&self.glx, &extra_functions, &extensions, (3, 2),
+ if let Ok(ctxt) = create_context(&self.glx, &extra_functions, &self.extensions, (3, 2),
self.opengl.profile, self.opengl.debug,
self.opengl.robustness, share,
self.display, self.fb_config, &self.visual_infos)
{
ctxt
- } else if let Ok(ctxt) = create_context(&self.glx, &extra_functions, &extensions,
+ } else if let Ok(ctxt) = create_context(&self.glx, &extra_functions, &self.extensions,
(3, 1), self.opengl.profile,
self.opengl.debug,
self.opengl.robustness, share, self.display,
@@ -177,21 +180,21 @@ impl<'a> ContextPrototype<'a> {
ctxt
} else {
- try!(create_context(&self.glx, &extra_functions, &extensions, (1, 0),
+ try!(create_context(&self.glx, &extra_functions, &self.extensions, (1, 0),
self.opengl.profile, self.opengl.debug,
self.opengl.robustness,
share, self.display, self.fb_config, &self.visual_infos))
}
},
GlRequest::Specific(Api::OpenGl, (major, minor)) => {
- try!(create_context(&self.glx, &extra_functions, &extensions, (major, minor),
+ try!(create_context(&self.glx, &extra_functions, &self.extensions, (major, minor),
self.opengl.profile, self.opengl.debug,
self.opengl.robustness, share, self.display, self.fb_config,
&self.visual_infos))
},
GlRequest::Specific(_, _) => panic!("Only OpenGL is supported"),
GlRequest::GlThenGles { opengl_version: (major, minor), .. } => {
- try!(create_context(&self.glx, &extra_functions, &extensions, (major, minor),
+ try!(create_context(&self.glx, &extra_functions, &self.extensions, (major, minor),
self.opengl.profile, self.opengl.debug,
self.opengl.robustness, share, self.display, self.fb_config,
&self.visual_infos))
@@ -264,10 +267,10 @@ fn create_context(glx: &ffi::glx::Glx, extra_functions: &ffi::glx_extra::Glx, ex
let context = if extensions.split(' ').find(|&i| i == "GLX_ARB_create_context").is_some() {
let mut attributes = Vec::with_capacity(9);
- attributes.push(ffi::glx_extra::CONTEXT_MAJOR_VERSION_ARB as libc::c_int);
- attributes.push(version.0 as libc::c_int);
- attributes.push(ffi::glx_extra::CONTEXT_MINOR_VERSION_ARB as libc::c_int);
- attributes.push(version.1 as libc::c_int);
+ attributes.push(ffi::glx_extra::CONTEXT_MAJOR_VERSION_ARB as c_int);
+ attributes.push(version.0 as c_int);
+ attributes.push(ffi::glx_extra::CONTEXT_MINOR_VERSION_ARB as c_int);
+ attributes.push(version.1 as c_int);
if let Some(profile) = profile {
let flag = match profile {
@@ -277,8 +280,8 @@ fn create_context(glx: &ffi::glx::Glx, extra_functions: &ffi::glx_extra::Glx, ex
ffi::glx_extra::CONTEXT_CORE_PROFILE_BIT_ARB,
};
- attributes.push(ffi::glx_extra::CONTEXT_PROFILE_MASK_ARB as libc::c_int);
- attributes.push(flag as libc::c_int);
+ attributes.push(ffi::glx_extra::CONTEXT_PROFILE_MASK_ARB as c_int);
+ attributes.push(flag as c_int);
}
let flags = {
@@ -288,14 +291,14 @@ fn create_context(glx: &ffi::glx::Glx, extra_functions: &ffi::glx_extra::Glx, ex
if extensions.split(' ').find(|&i| i == "GLX_ARB_create_context_robustness").is_some() {
match robustness {
Robustness::RobustNoResetNotification | Robustness::TryRobustNoResetNotification => {
- attributes.push(ffi::glx_extra::CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB as libc::c_int);
- attributes.push(ffi::glx_extra::NO_RESET_NOTIFICATION_ARB as libc::c_int);
- flags = flags | ffi::glx_extra::CONTEXT_ROBUST_ACCESS_BIT_ARB as libc::c_int;
+ attributes.push(ffi::glx_extra::CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB as c_int);
+ attributes.push(ffi::glx_extra::NO_RESET_NOTIFICATION_ARB as c_int);
+ flags = flags | ffi::glx_extra::CONTEXT_ROBUST_ACCESS_BIT_ARB as c_int;
},
Robustness::RobustLoseContextOnReset | Robustness::TryRobustLoseContextOnReset => {
- attributes.push(ffi::glx_extra::CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB as libc::c_int);
- 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;
+ attributes.push(ffi::glx_extra::CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB as c_int);
+ attributes.push(ffi::glx_extra::LOSE_CONTEXT_ON_RESET_ARB as c_int);
+ flags = flags | ffi::glx_extra::CONTEXT_ROBUST_ACCESS_BIT_ARB as c_int;
},
Robustness::NotRobust => (),
Robustness::NoError => (),
@@ -310,13 +313,13 @@ fn create_context(glx: &ffi::glx::Glx, extra_functions: &ffi::glx_extra::Glx, ex
}
if debug {
- flags = flags | ffi::glx_extra::CONTEXT_DEBUG_BIT_ARB as libc::c_int;
+ flags = flags | ffi::glx_extra::CONTEXT_DEBUG_BIT_ARB as c_int;
}
flags
};
- attributes.push(ffi::glx_extra::CONTEXT_FLAGS_ARB as libc::c_int);
+ attributes.push(ffi::glx_extra::CONTEXT_FLAGS_ARB as c_int);
attributes.push(flags);
attributes.push(0);
@@ -339,8 +342,9 @@ fn create_context(glx: &ffi::glx::Glx, extra_functions: &ffi::glx_extra::Glx, ex
}
/// Enumerates all available FBConfigs
-unsafe fn enumerate_configs(glx: &ffi::glx::Glx, xlib: &ffi::Xlib, display: *mut ffi::Display)
- -> Result<Vec<(ffi::glx::types::GLXFBConfig, PixelFormat)>, CreationError>
+unsafe fn choose_fbconfig(glx: &ffi::glx::Glx, extensions: &str, xlib: &ffi::Xlib,
+ display: *mut ffi::Display, reqs: &PixelFormatRequirements)
+ -> Result<(ffi::glx::types::GLXFBConfig, PixelFormat), ()>
{
let descriptor = {
let mut out: Vec<c_int> = Vec::with_capacity(37);
@@ -357,7 +361,7 @@ unsafe fn enumerate_configs(glx: &ffi::glx::Glx, xlib: &ffi::Xlib, display: *mut
out.push(ffi::glx::RENDER_TYPE as c_int);
if reqs.float_color_buffer {
if extensions.split(' ').find(|&i| i == "GLX_ARB_fbconfig_float").is_some() {
- out.push(ffi::glx::RGBA_FLOAT_BIT_ARB as c_int);
+ out.push(ffi::glx_extra::RGBA_FLOAT_BIT_ARB as c_int);
} else {
return Err(());
}
@@ -405,9 +409,9 @@ unsafe fn enumerate_configs(glx: &ffi::glx::Glx, xlib: &ffi::Xlib, display: *mut
if let Some(multisampling) = reqs.multisampling {
if extensions.split(' ').find(|&i| i == "GLX_ARB_multisample").is_some() {
- out.push(ffi::glx::SAMPLE_BUFFERS_ARB as c_int);
+ out.push(ffi::glx_extra::SAMPLE_BUFFERS_ARB as c_int);
out.push(if multisampling == 0 { 0 } else { 1 });
- out.push(ffi::glx::SAMPLES_ARB as c_int);
+ out.push(ffi::glx_extra::SAMPLES_ARB as c_int);
out.push(multisampling as c_int);
} else {
return Err(());
@@ -419,7 +423,7 @@ unsafe fn enumerate_configs(glx: &ffi::glx::Glx, xlib: &ffi::Xlib, display: *mut
if reqs.srgb {
if extensions.split(' ').find(|&i| i == "GLX_ARB_framebuffer_sRGB").is_some() {
- out.push(ffi::glx::FRAMEBUFFER_SRGB_CAPABLE_ARB as c_int);
+ out.push(ffi::glx_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB as c_int);
out.push(1);
} else {
return Err(());
@@ -430,8 +434,8 @@ unsafe fn enumerate_configs(glx: &ffi::glx::Glx, xlib: &ffi::Xlib, display: *mut
ReleaseBehavior::Flush => (),
ReleaseBehavior::None => {
if extensions.split(' ').find(|&i| i == "GLX_ARB_context_flush_control").is_some() {
- out.push(ffi::glx::CONTEXT_RELEASE_BEHAVIOR_ARB as c_int);
- out.push(ffi::glx::CONTEXT_RELEASE_BEHAVIOR_NONE_ARB as c_int);
+ out.push(ffi::glx_extra::CONTEXT_RELEASE_BEHAVIOR_ARB as c_int);
+ out.push(ffi::glx_extra::CONTEXT_RELEASE_BEHAVIOR_NONE_ARB as c_int);
}
},
}
@@ -442,14 +446,17 @@ unsafe fn enumerate_configs(glx: &ffi::glx::Glx, xlib: &ffi::Xlib, display: *mut
// calling glXChooseFBConfig
let fb_config = {
- let result = glx.ChooseFBConfig(display as *mut _, 0, descriptor.as_ptr(), &1);
+ let mut num_configs = 1;
+ let result = glx.ChooseFBConfig(display as *mut _, 0, descriptor.as_ptr(),
+ &mut num_configs);
if result.is_null() { return Err(()); }
+ if num_configs == 0 { return Err(()); }
let val = *result;
(xlib.XFree)(result as *mut _);
val
};
- let get_attrib = |attrib: libc::c_int| -> i32 {
+ let get_attrib = |attrib: c_int| -> i32 {
let mut value = 0;
glx.GetFBConfigAttrib(display as *mut _, fb_config, attrib, &mut value);
// TODO: check return value
@@ -457,22 +464,22 @@ unsafe fn enumerate_configs(glx: &ffi::glx::Glx, xlib: &ffi::Xlib, display: *mut
};
let pf_desc = PixelFormat {
- hardware_accelerated: get_attrib(ffi::glx::CONFIG_CAVEAT as libc::c_int, config) !=
- ffi::glx::SLOW_CONFIG as libc::c_int,
- color_bits: get_attrib(ffi::glx::RED_SIZE as libc::c_int, config) as u8 +
- get_attrib(ffi::glx::GREEN_SIZE as libc::c_int, config) as u8 +
- get_attrib(ffi::glx::BLUE_SIZE as libc::c_int, config) as u8,
- alpha_bits: get_attrib(ffi::glx::ALPHA_SIZE as libc::c_int, config) as u8,
- depth_bits: get_attrib(ffi::glx::DEPTH_SIZE as libc::c_int, config) as u8,
- stencil_bits: get_attrib(ffi::glx::STENCIL_SIZE as libc::c_int, config) as u8,
- stereoscopy: get_attrib(ffi::glx::STEREO as libc::c_int, config) != 0,
- double_buffer: get_attrib(ffi::glx::DOUBLEBUFFER as libc::c_int, config) != 0,
- multisampling: if get_attrib(ffi::glx::SAMPLE_BUFFERS as libc::c_int, config) != 0 {
- Some(get_attrib(ffi::glx::SAMPLES as libc::c_int, config) as u16)
+ hardware_accelerated: get_attrib(ffi::glx::CONFIG_CAVEAT as c_int) !=
+ ffi::glx::SLOW_CONFIG as c_int,
+ color_bits: get_attrib(ffi::glx::RED_SIZE as c_int) as u8 +
+ get_attrib(ffi::glx::GREEN_SIZE as c_int) as u8 +
+ get_attrib(ffi::glx::BLUE_SIZE as c_int) as u8,
+ alpha_bits: get_attrib(ffi::glx::ALPHA_SIZE as c_int) as u8,
+ depth_bits: get_attrib(ffi::glx::DEPTH_SIZE as c_int) as u8,
+ stencil_bits: get_attrib(ffi::glx::STENCIL_SIZE as c_int) as u8,
+ stereoscopy: get_attrib(ffi::glx::STEREO as c_int) != 0,
+ double_buffer: get_attrib(ffi::glx::DOUBLEBUFFER as c_int) != 0,
+ multisampling: if get_attrib(ffi::glx::SAMPLE_BUFFERS as c_int) != 0 {
+ Some(get_attrib(ffi::glx::SAMPLES as c_int) as u16)
} else {
None
},
- srgb: get_attrib(ffi::glx_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB as libc::c_int, config) != 0,
+ srgb: get_attrib(ffi::glx_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB as c_int) != 0,
};
Ok((fb_config, pf_desc))
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 15:15:50 +0000