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-rw-r--r--src/api/cocoa/mod.rs20
-rw-r--r--src/api/egl/mod.rs222
-rw-r--r--src/api/glx/mod.rs245
-rw-r--r--src/api/wgl/mod.rs408
4 files changed, 616 insertions, 279 deletions
diff --git a/src/api/cocoa/mod.rs b/src/api/cocoa/mod.rs
index c9e35a8..eae344c 100644
--- a/src/api/cocoa/mod.rs
+++ b/src/api/cocoa/mod.rs
@@ -13,6 +13,7 @@ use GlProfile;
use GlRequest;
use PixelFormat;
use PixelFormatRequirements;
+use ReleaseBehavior;
use Robustness;
use WindowAttributes;
use native_monitor::NativeMonitorId;
@@ -491,6 +492,8 @@ impl Window {
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,
@@ -501,10 +504,19 @@ impl Window {
NSOpenGLPFAOpenGLProfile as u32, profile,
];
- // A color depth higher than 64 implies we're using either 16-bit
- // floats or 32-bit floats and OS X requires a flag to be set
- // accordingly.
- if color_depth >= 64 {
+ 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);
}
diff --git a/src/api/egl/mod.rs b/src/api/egl/mod.rs
index 5e80068..582e376 100644
--- a/src/api/egl/mod.rs
+++ b/src/api/egl/mod.rs
@@ -9,6 +9,7 @@ use GlContext;
use GlRequest;
use PixelFormat;
use PixelFormatRequirements;
+use ReleaseBehavior;
use Robustness;
use Api;
@@ -247,8 +248,9 @@ impl Context {
}
};
- let configs = unsafe { try!(enumerate_configs(&egl, display, &egl_version, api, version)) };
- let (config_id, pixel_format) = try!(pf_reqs.choose_pixel_format(configs.into_iter()));
+ let (config_id, pixel_format) = unsafe {
+ try!(choose_fbconfig(&egl, display, &egl_version, api, version, pf_reqs))
+ };
Ok(ContextPrototype {
opengl: opengl,
@@ -451,108 +453,162 @@ impl<'a> ContextPrototype<'a> {
}
}
-unsafe fn enumerate_configs(egl: &ffi::egl::Egl, display: ffi::egl::types::EGLDisplay,
- egl_version: &(ffi::egl::types::EGLint, ffi::egl::types::EGLint),
- api: Api, version: Option<(u8, u8)>)
- -> Result<Vec<(ffi::egl::types::EGLConfig, PixelFormat)>, CreationError>
+unsafe fn choose_fbconfig(egl: &ffi::egl::Egl, display: ffi::egl::types::EGLDisplay,
+ egl_version: &(ffi::egl::types::EGLint, ffi::egl::types::EGLint),
+ api: Api, version: Option<(u8, u8)>, reqs: &PixelFormatRequirements)
+ -> Result<(ffi::egl::types::EGLConfig, PixelFormat), CreationError>
{
- let mut num_configs = mem::uninitialized();
- if egl.GetConfigs(display, ptr::null_mut(), 0, &mut num_configs) == 0 {
- return Err(CreationError::OsError(format!("eglGetConfigs failed")));
- }
+ let descriptor = {
+ let mut out: Vec<c_int> = Vec::with_capacity(37);
- let mut configs_ids = Vec::with_capacity(num_configs as usize);
- if egl.GetConfigs(display, configs_ids.as_mut_ptr(),
- configs_ids.capacity() as ffi::egl::types::EGLint,
- &mut num_configs) == 0
- {
- return Err(CreationError::OsError(format!("eglGetConfigs failed")));
- }
- configs_ids.set_len(num_configs as usize);
+ if egl_version >= &(1, 2) {
+ out.push(ffi::egl::COLOR_BUFFER_TYPE as c_int);
+ out.push(ffi::egl::RGB_BUFFER as c_int);
+ }
- // analyzing each config
- let mut result = Vec::with_capacity(num_configs as usize);
- for config_id in configs_ids {
- macro_rules! attrib {
- ($egl:expr, $display:expr, $config:expr, $attr:expr) => (
- {
- let mut value = mem::uninitialized();
- let res = $egl.GetConfigAttrib($display, $config,
- $attr as ffi::egl::types::EGLint, &mut value);
- if res == 0 {
- return Err(CreationError::OsError(format!("eglGetConfigAttrib failed")));
- }
- value
+ if egl_version >= &(1, 3) {
+ out.push(ffi::egl::SURFACE_TYPE as c_int);
+ out.push((ffi::egl::WINDOW_BIT | ffi::egl::PBUFFER_BIT) as c_int);
+ }
+
+ match (api, version) {
+ (Api::OpenGlEs, Some((3, _))) => {
+ if egl_version < &(1, 3) { return Err(CreationError::NoAvailablePixelFormat); }
+ out.push(ffi::egl::RENDERABLE_TYPE as c_int);
+ out.push(ffi::egl::OPENGL_ES3_BIT as c_int);
+ out.push(ffi::egl::CONFORMANT as c_int);
+ out.push(ffi::egl::OPENGL_ES3_BIT as c_int);
+ },
+ (Api::OpenGlEs, Some((2, _))) => {
+ if egl_version < &(1, 3) { return Err(CreationError::NoAvailablePixelFormat); }
+ out.push(ffi::egl::RENDERABLE_TYPE as c_int);
+ out.push(ffi::egl::OPENGL_ES2_BIT as c_int);
+ out.push(ffi::egl::CONFORMANT as c_int);
+ out.push(ffi::egl::OPENGL_ES2_BIT as c_int);
+ },
+ (Api::OpenGlEs, Some((1, _))) => {
+ if egl_version >= &(1, 3) {
+ out.push(ffi::egl::RENDERABLE_TYPE as c_int);
+ out.push(ffi::egl::OPENGL_ES_BIT as c_int);
+ out.push(ffi::egl::CONFORMANT as c_int);
+ out.push(ffi::egl::OPENGL_ES_BIT as c_int);
}
- )
+ },
+ (Api::OpenGlEs, _) => unimplemented!(),
+ (Api::OpenGl, Some((1, _))) => {
+ if egl_version < &(1, 3) { return Err(CreationError::NoAvailablePixelFormat); }
+ out.push(ffi::egl::RENDERABLE_TYPE as c_int);
+ out.push(ffi::egl::OPENGL_BIT as c_int);
+ out.push(ffi::egl::CONFORMANT as c_int);
+ out.push(ffi::egl::OPENGL_BIT as c_int);
+ },
+ (_, _) => unimplemented!(),
};
- let renderable = attrib!(egl, display, config_id, ffi::egl::RENDERABLE_TYPE) as u32;
- let conformant = attrib!(egl, display, config_id, ffi::egl::CONFORMANT) as u32;
+ if let Some(hardware_accelerated) = reqs.hardware_accelerated {
+ out.push(ffi::egl::CONFIG_CAVEAT as c_int);
+ out.push(if hardware_accelerated {
+ ffi::egl::NONE as c_int
+ } else {
+ ffi::egl::SLOW_CONFIG as c_int
+ });
+ }
- if api == Api::OpenGlEs {
- if let Some(version) = version {
- if version.0 == 3 && (renderable & ffi::egl::OPENGL_ES3_BIT == 0 ||
- conformant & ffi::egl::OPENGL_ES3_BIT == 0)
- {
- continue;
- }
+ if let Some(color) = reqs.color_bits {
+ out.push(ffi::egl::RED_SIZE as c_int);
+ out.push((color / 3) as c_int);
+ out.push(ffi::egl::GREEN_SIZE as c_int);
+ out.push((color / 3 + if color % 3 != 0 { 1 } else { 0 }) as c_int);
+ out.push(ffi::egl::BLUE_SIZE as c_int);
+ out.push((color / 3 + if color % 3 == 2 { 1 } else { 0 }) as c_int);
+ }
- if version.0 == 2 && (renderable & ffi::egl::OPENGL_ES2_BIT == 0 ||
- conformant & ffi::egl::OPENGL_ES2_BIT == 0)
- {
- continue;
- }
+ if let Some(alpha) = reqs.alpha_bits {
+ out.push(ffi::egl::ALPHA_SIZE as c_int);
+ out.push(alpha as c_int);
+ }
- if version.0 == 1 && (renderable & ffi::egl::OPENGL_ES_BIT == 0 ||
- conformant & ffi::egl::OPENGL_ES_BIT == 0)
- {
- continue;
- }
- }
+ if let Some(depth) = reqs.depth_bits {
+ out.push(ffi::egl::DEPTH_SIZE as c_int);
+ out.push(depth as c_int);
+ }
- } else if api == Api::OpenGl {
- if renderable & ffi::egl::OPENGL_BIT == 0 ||
- conformant & ffi::egl::OPENGL_BIT == 0
- {
- continue;
- }
+ if let Some(stencil) = reqs.stencil_bits {
+ out.push(ffi::egl::STENCIL_SIZE as c_int);
+ out.push(stencil as c_int);
}
- if attrib!(egl, display, config_id, ffi::egl::SURFACE_TYPE) &
- (ffi::egl::WINDOW_BIT | ffi::egl::PBUFFER_BIT) as i32 == 0
- {
- continue;
+ if let Some(true) = reqs.double_buffer {
+ return Err(CreationError::NoAvailablePixelFormat);
}
- if attrib!(egl, display, config_id, ffi::egl::TRANSPARENT_TYPE) != ffi::egl::NONE as i32 {
- continue;
+ if let Some(multisampling) = reqs.multisampling {
+ out.push(ffi::egl::SAMPLES as c_int);
+ out.push(multisampling as c_int);
}
- if attrib!(egl, display, config_id, ffi::egl::COLOR_BUFFER_TYPE) != ffi::egl::RGB_BUFFER as i32 {
- continue;
+ if reqs.stereoscopy {
+ return Err(CreationError::NoAvailablePixelFormat);
}
- result.push((config_id, PixelFormat {
- hardware_accelerated: attrib!(egl, display, config_id, ffi::egl::CONFIG_CAVEAT)
- != ffi::egl::SLOW_CONFIG as i32,
- color_bits: attrib!(egl, display, config_id, ffi::egl::RED_SIZE) as u8 +
- attrib!(egl, display, config_id, ffi::egl::BLUE_SIZE) as u8 +
- attrib!(egl, display, config_id, ffi::egl::GREEN_SIZE) as u8,
- alpha_bits: attrib!(egl, display, config_id, ffi::egl::ALPHA_SIZE) as u8,
- depth_bits: attrib!(egl, display, config_id, ffi::egl::DEPTH_SIZE) as u8,
- stencil_bits: attrib!(egl, display, config_id, ffi::egl::STENCIL_SIZE) as u8,
- stereoscopy: false,
- double_buffer: true,
- multisampling: match attrib!(egl, display, config_id, ffi::egl::SAMPLES) {
- 0 | 1 => None,
- a => Some(a as u16),
+ // FIXME: srgb is not taken into account
+
+ match reqs.release_behavior {
+ ReleaseBehavior::Flush => (),
+ ReleaseBehavior::None => {
+ // TODO: with EGL you need to manually set the behavior
+ unimplemented!()
},
- srgb: false, // TODO: use EGL_KHR_gl_colorspace to know that
- }));
+ }
+
+ out.push(0);
+ out
+ };
+
+ // calling `eglChooseConfig`
+ let mut config_id = mem::uninitialized();
+ let mut num_configs = mem::uninitialized();
+ if egl.ChooseConfig(display, descriptor.as_ptr(), &mut config_id, 1, &mut num_configs) == 0 {
+ return Err(CreationError::OsError(format!("eglChooseConfig failed")));
+ }
+ if num_configs == 0 {
+ return Err(CreationError::NoAvailablePixelFormat);
}
- Ok(result)
+ // analyzing each config
+ macro_rules! attrib {
+ ($egl:expr, $display:expr, $config:expr, $attr:expr) => (
+ {
+ let mut value = mem::uninitialized();
+ let res = $egl.GetConfigAttrib($display, $config,
+ $attr as ffi::egl::types::EGLint, &mut value);
+ if res == 0 {
+ return Err(CreationError::OsError(format!("eglGetConfigAttrib failed")));
+ }
+ value
+ }
+ )
+ };
+
+ let desc = PixelFormat {
+ hardware_accelerated: attrib!(egl, display, config_id, ffi::egl::CONFIG_CAVEAT)
+ != ffi::egl::SLOW_CONFIG as i32,
+ color_bits: attrib!(egl, display, config_id, ffi::egl::RED_SIZE) as u8 +
+ attrib!(egl, display, config_id, ffi::egl::BLUE_SIZE) as u8 +
+ attrib!(egl, display, config_id, ffi::egl::GREEN_SIZE) as u8,
+ alpha_bits: attrib!(egl, display, config_id, ffi::egl::ALPHA_SIZE) as u8,
+ depth_bits: attrib!(egl, display, config_id, ffi::egl::DEPTH_SIZE) as u8,
+ stencil_bits: attrib!(egl, display, config_id, ffi::egl::STENCIL_SIZE) as u8,
+ stereoscopy: false,
+ double_buffer: true,
+ multisampling: match attrib!(egl, display, config_id, ffi::egl::SAMPLES) {
+ 0 | 1 => None,
+ a => Some(a as u16),
+ },
+ srgb: false, // TODO: use EGL_KHR_gl_colorspace to know that
+ };
+
+ Ok((config_id, desc))
}
unsafe fn create_context(egl: &ffi::egl::Egl, display: ffi::egl::types::EGLDisplay,
diff --git a/src/api/glx/mod.rs b/src/api/glx/mod.rs
index 61a7d2f..9f3e084 100644
--- a/src/api/glx/mod.rs
+++ b/src/api/glx/mod.rs
@@ -9,9 +9,11 @@ use GlRequest;
use Api;
use PixelFormat;
use PixelFormatRequirements;
+use ReleaseBehavior;
use Robustness;
use libc;
+use libc::c_int;
use std::ffi::{CStr, CString};
use std::{mem, ptr, slice};
@@ -39,10 +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
@@ -58,6 +67,7 @@ impl Context {
Ok(ContextPrototype {
glx: glx,
+ extensions: extensions,
opengl: opengl,
display: display,
fb_config: fb_config,
@@ -125,6 +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,
@@ -144,13 +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| {
@@ -161,13 +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,
@@ -176,21 +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))
@@ -263,10 +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 {
@@ -276,8 +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 = {
@@ -287,14 +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 => (),
@@ -309,13 +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);
@@ -338,78 +342,145 @@ 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 configs: Vec<ffi::glx::types::GLXFBConfig> = {
- let mut num_configs = 0;
- let vals = glx.GetFBConfigs(display as *mut _, 0, &mut num_configs); // TODO: screen number
- assert!(!vals.is_null());
- let configs = slice::from_raw_parts(vals, num_configs as usize);
- let ret = configs.to_vec();
- (xlib.XFree)(vals as *mut _);
- ret
- };
+ let descriptor = {
+ let mut out: Vec<c_int> = Vec::with_capacity(37);
- let get_attrib = |attrib: libc::c_int, fb_config: ffi::glx::types::GLXFBConfig| -> i32 {
- let mut value = 0;
- glx.GetFBConfigAttrib(display as *mut _, fb_config, attrib, &mut value);
- // TODO: check return value
- value
- };
+ out.push(ffi::glx::X_RENDERABLE as c_int);
+ out.push(1);
+
+ out.push(ffi::glx::X_VISUAL_TYPE as c_int);
+ out.push(ffi::glx::TRUE_COLOR as c_int);
+
+ out.push(ffi::glx::DRAWABLE_TYPE as c_int);
+ out.push(ffi::glx::WINDOW_BIT as c_int);
+
+ 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_extra::RGBA_FLOAT_BIT_ARB as c_int);
+ } else {
+ return Err(());
+ }
+ } else {
+ out.push(ffi::glx::RGBA_BIT as c_int);
+ }
+
+ if let Some(hardware_accelerated) = reqs.hardware_accelerated {
+ out.push(ffi::glx::CONFIG_CAVEAT as c_int);
+ out.push(if hardware_accelerated {
+ ffi::glx::NONE as c_int
+ } else {
+ ffi::glx::SLOW_CONFIG as c_int
+ });
+ }
- Ok(configs.into_iter().filter_map(|config| {
- if get_attrib(ffi::glx::X_RENDERABLE as libc::c_int, config) == 0 {
- return None;
+ if let Some(color) = reqs.color_bits {
+ out.push(ffi::glx::RED_SIZE as c_int);
+ out.push((color / 3) as c_int);
+ out.push(ffi::glx::GREEN_SIZE as c_int);
+ out.push((color / 3 + if color % 3 != 0 { 1 } else { 0 }) as c_int);
+ out.push(ffi::glx::BLUE_SIZE as c_int);
+ out.push((color / 3 + if color % 3 == 2 { 1 } else { 0 }) as c_int);
}
- if get_attrib(ffi::glx::X_VISUAL_TYPE as libc::c_int, config) !=
- ffi::glx::TRUE_COLOR as libc::c_int
- {
- return None;
+ if let Some(alpha) = reqs.alpha_bits {
+ out.push(ffi::glx::ALPHA_SIZE as c_int);
+ out.push(alpha as c_int);
}
- if get_attrib(ffi::glx::DRAWABLE_TYPE as libc::c_int, config) &
- ffi::glx::WINDOW_BIT as libc::c_int == 0
- {
- return None;
+ if let Some(depth) = reqs.depth_bits {
+ out.push(ffi::glx::DEPTH_SIZE as c_int);
+ out.push(depth as c_int);
}
- if get_attrib(ffi::glx::VISUAL_ID as libc::c_int, config) == 0 {
- return None;
+ if let Some(stencil) = reqs.stencil_bits {
+ out.push(ffi::glx::STENCIL_SIZE as c_int);
+ out.push(stencil as c_int);
}
- if get_attrib(ffi::glx::RENDER_TYPE as libc::c_int, config) &
- ffi::glx::RGBA_BIT as libc::c_int == 0
- {
- return None;
+ if let Some(double_buffer) = reqs.double_buffer {
+ out.push(ffi::glx::DOUBLEBUFFER as c_int);
+ out.push(if double_buffer { 1 } else { 0 });
}
- // TODO: add a flag to PixelFormat for non-conformant configs
- let caveat = get_attrib(ffi::glx::CONFIG_CAVEAT as libc::c_int, config);
- /*if caveat == ffi::glx::NON_CONFORMANT_CONFIG as libc::c_int {
- return None;
- }*/
-
- // TODO: make sure everything is supported
- let pf = PixelFormat {
- hardware_accelerated: caveat != 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)
+ if let Some(multisampling) = reqs.multisampling {
+ if extensions.split(' ').find(|&i| i == "GLX_ARB_multisample").is_some() {
+ out.push(ffi::glx_extra::SAMPLE_BUFFERS_ARB as c_int);
+ out.push(if multisampling == 0 { 0 } else { 1 });
+ out.push(ffi::glx_extra::SAMPLES_ARB as c_int);
+ out.push(multisampling as c_int);
+ } else {
+ return Err(());
+ }
+ }
+
+ out.push(ffi::glx::STEREO as c_int);
+ out.push(if reqs.stereoscopy { 1 } else { 0 });
+
+ if reqs.srgb {
+ if extensions.split(' ').find(|&i| i == "GLX_ARB_framebuffer_sRGB").is_some() {
+ out.push(ffi::glx_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB as c_int);
+ out.push(1);
} else {
- None
+ return Err(());
+ }
+ }
+
+ match reqs.release_behavior {
+ ReleaseBehavior::Flush => (),
+ ReleaseBehavior::None => {
+ if extensions.split(' ').find(|&i| i == "GLX_ARB_context_flush_control").is_some() {
+ 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);
+ }
},
- srgb: get_attrib(ffi::glx_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB as libc::c_int, config) != 0,
- };
+ }
+
+ out.push(0);
+ out
+ };
+
+ // calling glXChooseFBConfig
+ let fb_config = {
+ 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: c_int| -> i32 {
+ let mut value = 0;
+ glx.GetFBConfigAttrib(display as *mut _, fb_config, attrib, &mut value);
+ // TODO: check return value
+ value
+ };
+
+ let pf_desc = PixelFormat {
+ 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 c_int) != 0,
+ };
- Some((config, pf))
- }).collect())
+ Ok((fb_config, pf_desc))
}
diff --git a/src/api/wgl/mod.rs b/src/api/wgl/mod.rs
index 77e3f83..dcd16b6 100644
--- a/src/api/wgl/mod.rs
+++ b/src/api/wgl/mod.rs
@@ -8,6 +8,7 @@ use GlRequest;
use GlProfile;
use PixelFormat;
use PixelFormatRequirements;
+use ReleaseBehavior;
use Robustness;
use Api;
@@ -107,20 +108,16 @@ impl Context {
// calling SetPixelFormat
let pixel_format = {
- let formats = if extensions.split(' ').find(|&i| i == "WGL_ARB_pixel_format")
+ let (id, f) = if extensions.split(' ').find(|&i| i == "WGL_ARB_pixel_format")
.is_some()
{
- let f = enumerate_arb_pixel_formats(&extra_functions, &extensions, hdc);
- if f.is_empty() {
- enumerate_native_pixel_formats(hdc)
- } else {
- f
- }
+ try!(choose_arb_pixel_format(&extra_functions, &extensions, hdc, pf_reqs)
+ .map_err(|_| CreationError::NoAvailablePixelFormat))
} else {
- enumerate_native_pixel_formats(hdc)
+ try!(choose_native_pixel_format(hdc, pf_reqs)
+ .map_err(|_| CreationError::NoAvailablePixelFormat))
};
- let (id, f) = try!(pf_reqs.choose_pixel_format(formats));
try!(set_pixel_format(hdc, id));
f
};
@@ -349,117 +346,297 @@ unsafe fn create_context(extra: Option<(&gl::wgl_extra::Wgl, &PixelFormatRequire
Ok(ContextWrapper(ctxt as winapi::HGLRC))
}
-/// Enumerates the list of pixel formats without using WGL.
+/// Chooses a pixel formats without using WGL.
///
/// Gives less precise results than `enumerate_arb_pixel_formats`.
-unsafe fn enumerate_native_pixel_formats(hdc: winapi::HDC) -> Vec<(c_int, PixelFormat)> {
- let size_of_pxfmtdescr = mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as u32;
- let num = gdi32::DescribePixelFormat(hdc, 1, size_of_pxfmtdescr, ptr::null_mut());
+unsafe fn choose_native_pixel_format(hdc: winapi::HDC, reqs: &PixelFormatRequirements)
+ -> Result<(c_int, PixelFormat), ()>
+{
+ // TODO: hardware acceleration is not handled
- let mut result = Vec::new();
+ // handling non-supported stuff
+ if reqs.float_color_buffer {
+ return Err(());
+ }
- for index in (0 .. num) {
- let mut output: winapi::PIXELFORMATDESCRIPTOR = mem::zeroed();
-
- if gdi32::DescribePixelFormat(hdc, index, size_of_pxfmtdescr, &mut output) == 0 {
- continue;
- }
+ match reqs.multisampling {
+ Some(0) => (),
+ None => (),
+ Some(_) => return Err(())
+ };
- if (output.dwFlags & winapi::PFD_DRAW_TO_WINDOW) == 0 {
- continue;
- }
+ if reqs.stereoscopy {
+ return Err(());
+ }
- if (output.dwFlags & winapi::PFD_SUPPORT_OPENGL) == 0 {
- continue;
- }
+ if reqs.srgb {
+ return Err(());
+ }
- if output.iPixelType != winapi::PFD_TYPE_RGBA {
- continue;
- }
+ if reqs.release_behavior != ReleaseBehavior::Flush {
+ return Err(());
+ }
+
+ // building the descriptor to pass to ChoosePixelFormat
+ let descriptor = winapi::PIXELFORMATDESCRIPTOR {
+ nSize: mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as u16,
+ nVersion: 1,
+ dwFlags: {
+ let f1 = match reqs.double_buffer {
+ None => winapi::PFD_DOUBLEBUFFER_DONTCARE,
+ Some(true) => winapi::PFD_DOUBLEBUFFER,
+ Some(false) => 0,
+ };
+
+ let f2 = if reqs.stereoscopy {
+ winapi::PFD_STEREO
+ } else {
+ 0
+ };
+
+ winapi::PFD_DRAW_TO_WINDOW | winapi::PFD_SUPPORT_OPENGL | f1 | f2
+ },
+ iPixelType: winapi::PFD_TYPE_RGBA,
+ cColorBits: reqs.color_bits.unwrap_or(0),
+ cRedBits: 0,
+ cRedShift: 0,
+ cGreenBits: 0,
+ cGreenShift: 0,
+ cBlueBits: 0,
+ cBlueShift: 0,
+ cAlphaBits: reqs.alpha_bits.unwrap_or(0),
+ cAlphaShift: 0,
+ cAccumBits: 0,
+ cAccumRedBits: 0,
+ cAccumGreenBits: 0,
+ cAccumBlueBits: 0,
+ cAccumAlphaBits: 0,
+ cDepthBits: reqs.depth_bits.unwrap_or(0),
+ cStencilBits: reqs.stencil_bits.unwrap_or(0),
+ cAuxBuffers: 0,
+ iLayerType: winapi::PFD_MAIN_PLANE,
+ bReserved: 0,
+ dwLayerMask: 0,
+ dwVisibleMask: 0,
+ dwDamageMask: 0,
+ };
+
+ // now querying
+ let pf_id = gdi32::ChoosePixelFormat(hdc, &descriptor);
+ if pf_id == 0 {
+ return Err(());
+ }
+
+ // querying back the capabilities of what windows told us
+ let mut output: winapi::PIXELFORMATDESCRIPTOR = mem::zeroed();
+ if gdi32::DescribePixelFormat(hdc, pf_id, mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as u32,
+ &mut output) == 0
+ {
+ return Err(());
+ }
- result.push((index, PixelFormat {
- hardware_accelerated: (output.dwFlags & winapi::PFD_GENERIC_FORMAT) == 0,
- color_bits: output.cRedBits + output.cGreenBits + output.cBlueBits,
- alpha_bits: output.cAlphaBits,
- depth_bits: output.cDepthBits,
- stencil_bits: output.cStencilBits,
- stereoscopy: (output.dwFlags & winapi::PFD_STEREO) != 0,
- double_buffer: (output.dwFlags & winapi::PFD_DOUBLEBUFFER) != 0,
- multisampling: None,
- srgb: false,
- }));
+ // windows may return us a non-conforming pixel format if none are supported, so we have to
+ // check this
+ if (output.dwFlags & winapi::PFD_DRAW_TO_WINDOW) == 0 {
+ return Err(());
+ }
+ if (output.dwFlags & winapi::PFD_SUPPORT_OPENGL) == 0 {
+ return Err(());
}
+ if output.iPixelType != winapi::PFD_TYPE_RGBA {
+ return Err(());
+ }
+
+ let pf_desc = PixelFormat {
+ hardware_accelerated: (output.dwFlags & winapi::PFD_GENERIC_FORMAT) == 0,
+ color_bits: output.cRedBits + output.cGreenBits + output.cBlueBits,
+ alpha_bits: output.cAlphaBits,
+ depth_bits: output.cDepthBits,
+ stencil_bits: output.cStencilBits,
+ stereoscopy: (output.dwFlags & winapi::PFD_STEREO) != 0,
+ double_buffer: (output.dwFlags & winapi::PFD_DOUBLEBUFFER) != 0,
+ multisampling: None,
+ srgb: false,
+ };
- result
+ if pf_desc.alpha_bits < reqs.alpha_bits.unwrap_or(0) {
+ return Err(());
+ }
+ if pf_desc.depth_bits < reqs.depth_bits.unwrap_or(0) {
+ return Err(());
+ }
+ if pf_desc.stencil_bits < reqs.stencil_bits.unwrap_or(0) {
+ return Err(());
+ }
+ if pf_desc.color_bits < reqs.color_bits.unwrap_or(0) {
+ return Err(());
+ }
+ if let Some(req) = reqs.hardware_accelerated {
+ if pf_desc.hardware_accelerated != req {
+ return Err(());
+ }
+ }
+ if let Some(req) = reqs.double_buffer {
+ if pf_desc.double_buffer != req {
+ return Err(());
+ }
+ }
+
+ Ok((pf_id, pf_desc))
}
/// Enumerates the list of pixel formats by using extra WGL functions.
///
/// Gives more precise results than `enumerate_native_pixel_formats`.
-unsafe fn enumerate_arb_pixel_formats(extra: &gl::wgl_extra::Wgl, extensions: &str,
- hdc: winapi::HDC) -> Vec<(c_int, PixelFormat)>
+unsafe fn choose_arb_pixel_format(extra: &gl::wgl_extra::Wgl, extensions: &str,
+ hdc: winapi::HDC, reqs: &PixelFormatRequirements)
+ -> Result<(c_int, PixelFormat), ()>
{
- let get_info = |index: u32, attrib: u32| {
- let mut value = mem::uninitialized();
- extra.GetPixelFormatAttribivARB(hdc as *const _, index as c_int,
- 0, 1, [attrib as c_int].as_ptr(),
- &mut value);
- value as u32
- };
+ let descriptor = {
+ let mut out: Vec<c_int> = Vec::with_capacity(37);
- // getting the number of formats
- // the `1` is ignored
- let num = get_info(1, gl::wgl_extra::NUMBER_PIXEL_FORMATS_ARB);
+ out.push(gl::wgl_extra::DRAW_TO_WINDOW_ARB as c_int);
+ out.push(1);
- let mut result = Vec::new();
+ out.push(gl::wgl_extra::SUPPORT_OPENGL_ARB as c_int);
+ out.push(1);
- for index in (0 .. num) {
- if get_info(index, gl::wgl_extra::DRAW_TO_WINDOW_ARB) == 0 {
- continue;
+ out.push(gl::wgl_extra::PIXEL_TYPE_ARB as c_int);
+ if reqs.float_color_buffer {
+ if extensions.split(' ').find(|&i| i == "WGL_ARB_pixel_format_float").is_some() {
+ out.push(gl::wgl_extra::TYPE_RGBA_FLOAT_ARB as c_int);
+ } else {
+ return Err(());
+ }
+ } else {
+ out.push(gl::wgl_extra::TYPE_RGBA_ARB as c_int);
}
- if get_info(index, gl::wgl_extra::SUPPORT_OPENGL_ARB) == 0 {
- continue;
+
+ if let Some(hardware_accelerated) = reqs.hardware_accelerated {
+ out.push(gl::wgl_extra::ACCELERATION_ARB as c_int);
+ out.push(if hardware_accelerated {
+ gl::wgl_extra::FULL_ACCELERATION_ARB as c_int
+ } else {
+ gl::wgl_extra::NO_ACCELERATION_ARB as c_int
+ });
}
- if get_info(index, gl::wgl_extra::ACCELERATION_ARB) == gl::wgl_extra::NO_ACCELERATION_ARB {
- continue;
+ if let Some(color) = reqs.color_bits {
+ out.push(gl::wgl_extra::COLOR_BITS_ARB as c_int);
+ out.push(color as c_int);
}
- if get_info(index, gl::wgl_extra::PIXEL_TYPE_ARB) != gl::wgl_extra::TYPE_RGBA_ARB {
- continue;
+ if let Some(alpha) = reqs.alpha_bits {
+ out.push(gl::wgl_extra::ALPHA_BITS_ARB as c_int);
+ out.push(alpha as c_int);
}
- result.push((index as c_int, PixelFormat {
- hardware_accelerated: true,
- color_bits: get_info(index, gl::wgl_extra::RED_BITS_ARB) as u8 +
- get_info(index, gl::wgl_extra::GREEN_BITS_ARB) as u8 +
- get_info(index, gl::wgl_extra::BLUE_BITS_ARB) as u8,
- alpha_bits: get_info(index, gl::wgl_extra::ALPHA_BITS_ARB) as u8,
- depth_bits: get_info(index, gl::wgl_extra::DEPTH_BITS_ARB) as u8,
- stencil_bits: get_info(index, gl::wgl_extra::STENCIL_BITS_ARB) as u8,
- stereoscopy: get_info(index, gl::wgl_extra::STEREO_ARB) != 0,
- double_buffer: get_info(index, gl::wgl_extra::DOUBLE_BUFFER_ARB) != 0,
- multisampling: {
- if extensions.split(' ').find(|&i| i == "WGL_ARB_multisample").is_some() {
- match get_info(index, gl::wgl_extra::SAMPLES_ARB) {
- 0 => None,
- a => Some(a as u16),
- }
- } else {
- None
- }
- },
- srgb: if extensions.split(' ').find(|&i| i == "WGL_ARB_framebuffer_sRGB").is_some() {
- get_info(index, gl::wgl_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB) != 0
+ if let Some(depth) = reqs.depth_bits {
+ out.push(gl::wgl_extra::DEPTH_BITS_ARB as c_int);
+ out.push(depth as c_int);
+ }
+
+ if let Some(stencil) = reqs.stencil_bits {
+ out.push(gl::wgl_extra::STENCIL_BITS_ARB as c_int);
+ out.push(stencil as c_int);
+ }
+
+ if let Some(double_buffer) = reqs.double_buffer {
+ out.push(gl::wgl_extra::DOUBLE_BUFFER_ARB as c_int);
+ out.push(if double_buffer { 1 } else { 0 });
+ }
+
+ if let Some(multisampling) = reqs.multisampling {
+ if extensions.split(' ').find(|&i| i == "WGL_ARB_multisample").is_some() {
+ out.push(gl::wgl_extra::SAMPLE_BUFFERS_ARB as c_int);
+ out.push(if multisampling == 0 { 0 } else { 1 });
+ out.push(gl::wgl_extra::SAMPLES_ARB as c_int);
+ out.push(multisampling as c_int);
+ } else {
+ return Err(());
+ }
+ }
+
+ out.push(gl::wgl_extra::STEREO_ARB as c_int);
+ out.push(if reqs.stereoscopy { 1 } else { 0 });
+
+ if reqs.srgb {
+ if extensions.split(' ').find(|&i| i == "WGL_ARB_framebuffer_sRGB").is_some() {
+ out.push(gl::wgl_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB as c_int);
+ out.push(1);
} else if extensions.split(' ').find(|&i| i == "WGL_EXT_framebuffer_sRGB").is_some() {
- get_info(index, gl::wgl_extra::FRAMEBUFFER_SRGB_CAPABLE_EXT) != 0
+ out.push(gl::wgl_extra::FRAMEBUFFER_SRGB_CAPABLE_EXT as c_int);
+ out.push(1);
} else {
- false
+ return Err(());
+ }
+ }
+
+ match reqs.release_behavior {
+ ReleaseBehavior::Flush => (),
+ ReleaseBehavior::None => {
+ if extensions.split(' ').find(|&i| i == "WGL_ARB_context_flush_control").is_some() {
+ out.push(gl::wgl_extra::CONTEXT_RELEASE_BEHAVIOR_ARB as c_int);
+ out.push(gl::wgl_extra::CONTEXT_RELEASE_BEHAVIOR_NONE_ARB as c_int);
+ }
},
- }));
+ }
+
+ out.push(0);
+ out
+ };
+
+ let mut format_id = mem::uninitialized();
+ let mut num_formats = mem::uninitialized();
+ if extra.ChoosePixelFormatARB(hdc as *const _, descriptor.as_ptr(), ptr::null(), 1,
+ &mut format_id, &mut num_formats) == 0
+ {
+ return Err(());
}
- result
+ if num_formats == 0 {
+ return Err(());
+ }
+
+ let get_info = |attrib: u32| {
+ let mut value = mem::uninitialized();
+ extra.GetPixelFormatAttribivARB(hdc as *const _, format_id as c_int,
+ 0, 1, [attrib as c_int].as_ptr(),
+ &mut value);
+ value as u32
+ };
+
+ let pf_desc = PixelFormat {
+ hardware_accelerated: get_info(gl::wgl_extra::ACCELERATION_ARB) !=
+ gl::wgl_extra::NO_ACCELERATION_ARB,
+ color_bits: get_info(gl::wgl_extra::RED_BITS_ARB) as u8 +
+ get_info(gl::wgl_extra::GREEN_BITS_ARB) as u8 +
+ get_info(gl::wgl_extra::BLUE_BITS_ARB) as u8,
+ alpha_bits: get_info(gl::wgl_extra::ALPHA_BITS_ARB) as u8,
+ depth_bits: get_info(gl::wgl_extra::DEPTH_BITS_ARB) as u8,
+ stencil_bits: get_info(gl::wgl_extra::STENCIL_BITS_ARB) as u8,
+ stereoscopy: get_info(gl::wgl_extra::STEREO_ARB) != 0,
+ double_buffer: get_info(gl::wgl_extra::DOUBLE_BUFFER_ARB) != 0,
+ multisampling: {
+ if extensions.split(' ').find(|&i| i == "WGL_ARB_multisample").is_some() {
+ match get_info(gl::wgl_extra::SAMPLES_ARB) {
+ 0 => None,
+ a => Some(a as u16),
+ }
+ } else {
+ None
+ }
+ },
+ srgb: if extensions.split(' ').find(|&i| i == "WGL_ARB_framebuffer_sRGB").is_some() {
+ get_info(gl::wgl_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB) != 0
+ } else if extensions.split(' ').find(|&i| i == "WGL_EXT_framebuffer_sRGB").is_some() {
+ get_info(gl::wgl_extra::FRAMEBUFFER_SRGB_CAPABLE_EXT) != 0
+ } else {
+ false
+ },
+ };
+
+ Ok((format_id, pf_desc))
}
/// Calls `SetPixelFormat` on a window.
@@ -550,8 +727,7 @@ unsafe fn load_extra_functions(window: winapi::HWND) -> Result<gl::wgl_extra::Wg
// getting the pixel format that we will use and setting it
{
- let formats = enumerate_native_pixel_formats(dummy_window.1);
- let id = try!(choose_dummy_pixel_format(formats.into_iter()));
+ let id = try!(choose_dummy_pixel_format(dummy_window.1));
try!(set_pixel_format(dummy_window.1, id));
}
@@ -568,22 +744,44 @@ unsafe fn load_extra_functions(window: winapi::HWND) -> Result<gl::wgl_extra::Wg
}))
}
-/// Given a list of pixel formats, this function chooses one that is likely to be provided by
+/// This function chooses a pixel format that is likely to be provided by
/// the main video driver of the system.
-fn choose_dummy_pixel_format<I>(iter: I) -> Result<c_int, CreationError>
- where I: Iterator<Item=(c_int, PixelFormat)>
-{
- let mut backup_id = None;
-
- for (id, format) in iter {
- if backup_id.is_none() {
- backup_id = Some(id);
- }
+fn choose_dummy_pixel_format(hdc: winapi::HDC) -> Result<c_int, CreationError> {
+ // building the descriptor to pass to ChoosePixelFormat
+ let descriptor = winapi::PIXELFORMATDESCRIPTOR {
+ nSize: mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as u16,
+ nVersion: 1,
+ dwFlags: winapi::PFD_DRAW_TO_WINDOW | winapi::PFD_SUPPORT_OPENGL | winapi::PFD_DOUBLEBUFFER,
+ iPixelType: winapi::PFD_TYPE_RGBA,
+ cColorBits: 24,
+ cRedBits: 0,
+ cRedShift: 0,
+ cGreenBits: 0,
+ cGreenShift: 0,
+ cBlueBits: 0,
+ cBlueShift: 0,
+ cAlphaBits: 8,
+ cAlphaShift: 0,
+ cAccumBits: 0,
+ cAccumRedBits: 0,
+ cAccumGreenBits: 0,
+ cAccumBlueBits: 0,
+ cAccumAlphaBits: 0,
+ cDepthBits: 24,
+ cStencilBits: 8,
+ cAuxBuffers: 0,
+ iLayerType: winapi::PFD_MAIN_PLANE,
+ bReserved: 0,
+ dwLayerMask: 0,
+ dwVisibleMask: 0,
+ dwDamageMask: 0,
+ };
- if format.hardware_accelerated {
- return Ok(id);
- }
+ // now querying
+ let pf_id = unsafe { gdi32::ChoosePixelFormat(hdc, &descriptor) };
+ if pf_id == 0 {
+ return Err(CreationError::OsError("No available pixel format".to_owned()));
}
- backup_id.ok_or(CreationError::OsError("No available pixel format".to_string()))
+ Ok(pf_id)
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 00:40:30 +0000