diff options
Diffstat (limited to 'src/api/glx')
| -rw-r--r-- | src/api/glx/mod.rs | 245 |
1 files changed, 158 insertions, 87 deletions
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)) } |