diff options
Diffstat (limited to 'src/api/egl')
| -rw-r--r-- | src/api/egl/mod.rs | 301 |
1 files changed, 236 insertions, 65 deletions
diff --git a/src/api/egl/mod.rs b/src/api/egl/mod.rs index fdea2cd..18e731c 100644 --- a/src/api/egl/mod.rs +++ b/src/api/egl/mod.rs @@ -3,6 +3,7 @@ use BuilderAttribs; use CreationError; use GlRequest; +use PixelFormat; use Api; use libc; @@ -16,6 +17,8 @@ pub struct Context { display: ffi::egl::types::EGLDisplay, context: ffi::egl::types::EGLContext, surface: ffi::egl::types::EGLSurface, + api: Api, + pixel_format: PixelFormat, } impl Context { @@ -35,7 +38,7 @@ impl Context { display }; - let (_major, _minor) = unsafe { + let egl_version = unsafe { let mut major: ffi::egl::types::EGLint = mem::uninitialized(); let mut minor: ffi::egl::types::EGLint = mem::uninitialized(); @@ -46,62 +49,61 @@ impl Context { (major, minor) }; - let use_gles2 = match builder.gl_version { - GlRequest::Specific(Api::OpenGlEs, (2, _)) => true, - GlRequest::Specific(Api::OpenGlEs, _) => false, - GlRequest::Specific(_, _) => return Err(CreationError::NotSupported), - GlRequest::GlThenGles { opengles_version: (2, _), .. } => true, - _ => false, - }; - - let mut attribute_list = vec!(); - attribute_list.push(ffi::egl::RENDERABLE_TYPE as i32); - attribute_list.push(ffi::egl::OPENGL_ES2_BIT as i32); - - attribute_list.push(ffi::egl::CONFORMANT as i32); - attribute_list.push(ffi::egl::OPENGL_ES2_BIT as i32); - - attribute_list.push(ffi::egl::SURFACE_TYPE as i32); - attribute_list.push(ffi::egl::WINDOW_BIT as i32); - - { - let (red, green, blue) = match builder.color_bits.unwrap_or(24) { - 24 => (8, 8, 8), - 16 => (6, 5, 6), - _ => panic!("Bad color_bits"), - }; - - attribute_list.push(ffi::egl::RED_SIZE as i32); - attribute_list.push(red); - attribute_list.push(ffi::egl::GREEN_SIZE as i32); - attribute_list.push(green); - attribute_list.push(ffi::egl::BLUE_SIZE as i32); - attribute_list.push(blue); - } - - attribute_list.push(ffi::egl::DEPTH_SIZE as i32); - attribute_list.push(builder.depth_bits.unwrap_or(8) as i32); - - attribute_list.push(ffi::egl::NONE as i32); - - let config = unsafe { - let mut num_config: ffi::egl::types::EGLint = mem::uninitialized(); - let mut config: ffi::egl::types::EGLConfig = mem::uninitialized(); - if egl.ChooseConfig(display, attribute_list.as_ptr(), &mut config, 1, - &mut num_config) == 0 - { - return Err(CreationError::OsError(format!("eglChooseConfig failed"))) + // binding the right API and choosing the version + let (version, api) = unsafe { + match builder.gl_version { + GlRequest::Latest => { + if egl_version >= (1, 4) { + if egl.BindAPI(ffi::egl::OPENGL_API) != 0 { + (None, Api::OpenGl) + } else if egl.BindAPI(ffi::egl::OPENGL_ES_API) != 0 { + (None, Api::OpenGlEs) + } else { + return Err(CreationError::NotSupported); + } + } else { + (None, Api::OpenGlEs) + } + }, + GlRequest::Specific(Api::OpenGlEs, version) => { + if egl_version >= (1, 2) { + if egl.BindAPI(ffi::egl::OPENGL_ES_API) == 0 { + return Err(CreationError::NotSupported); + } + } + (Some(version), Api::OpenGlEs) + }, + GlRequest::Specific(Api::OpenGl, version) => { + if egl_version < (1, 4) { + return Err(CreationError::NotSupported); + } + if egl.BindAPI(ffi::egl::OPENGL_API) == 0 { + return Err(CreationError::NotSupported); + } + (Some(version), Api::OpenGl) + }, + GlRequest::Specific(_, _) => return Err(CreationError::NotSupported), + GlRequest::GlThenGles { opengles_version, opengl_version } => { + if egl_version >= (1, 4) { + if egl.BindAPI(ffi::egl::OPENGL_API) != 0 { + (Some(opengl_version), Api::OpenGl) + } else if egl.BindAPI(ffi::egl::OPENGL_ES_API) != 0 { + (Some(opengles_version), Api::OpenGlEs) + } else { + return Err(CreationError::NotSupported); + } + } else { + (Some(opengles_version), Api::OpenGlEs) + } + }, } - - if num_config <= 0 { - return Err(CreationError::OsError(format!("eglChooseConfig returned no available config"))) - } - - config }; + let configs = unsafe { try!(enumerate_configs(&egl, display, &egl_version, api, version)) }; + let (config_id, pixel_format) = try!(builder.choose_pixel_format(configs.into_iter())); + let surface = unsafe { - let surface = egl.CreateWindowSurface(display, config, native_window, ptr::null()); + let surface = egl.CreateWindowSurface(display, config_id, native_window, ptr::null()); if surface.is_null() { return Err(CreationError::OsError(format!("eglCreateWindowSurface failed"))) } @@ -109,17 +111,40 @@ impl Context { }; let context = unsafe { - let mut context_attributes = vec!(); - context_attributes.push(ffi::egl::CONTEXT_CLIENT_VERSION as i32); - context_attributes.push(2); - context_attributes.push(ffi::egl::NONE as i32); - - let context = egl.CreateContext(display, config, ptr::null(), - context_attributes.as_ptr()); - if context.is_null() { - return Err(CreationError::OsError(format!("eglCreateContext failed"))) + if let Some(version) = version { + try!(create_context(&egl, display, &egl_version, api, version, config_id, + builder.gl_debug).map_err(|_| CreationError::NotSupported)) + + } else if api == Api::OpenGlEs { + if let Ok(ctxt) = create_context(&egl, display, &egl_version, api, (2, 0), + config_id, builder.gl_debug) + { + ctxt + } else if let Ok(ctxt) = create_context(&egl, display, &egl_version, api, (1, 0), + config_id, builder.gl_debug) + { + ctxt + } else { + return Err(CreationError::NotSupported); + } + + } else { + if let Ok(ctxt) = create_context(&egl, display, &egl_version, api, (3, 2), + config_id, builder.gl_debug) + { + ctxt + } else if let Ok(ctxt) = create_context(&egl, display, &egl_version, api, (3, 1), + config_id, builder.gl_debug) + { + ctxt + } else if let Ok(ctxt) = create_context(&egl, display, &egl_version, api, (1, 0), + config_id, builder.gl_debug) + { + ctxt + } else { + return Err(CreationError::NotSupported); + } } - context }; Ok(Context { @@ -127,6 +152,8 @@ impl Context { display: display, context: context, surface: surface, + api: api, + pixel_format: pixel_format, }) } @@ -140,6 +167,10 @@ impl Context { } } + pub fn get_pixel_format(&self) -> &PixelFormat { + &self.pixel_format + } + pub fn is_current(&self) -> bool { unsafe { self.egl.GetCurrentContext() == self.context } } @@ -162,8 +193,8 @@ impl Context { } } - pub fn get_api(&self) -> ::Api { - ::Api::OpenGlEs + pub fn get_api(&self) -> Api { + self.api } } @@ -183,3 +214,143 @@ impl Drop for Context { } } } + +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> +{ + 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 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); + + // 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 + } + ) + }; + + 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 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 version.0 == 2 && (renderable & ffi::egl::OPENGL_ES2_BIT == 0 || + conformant & ffi::egl::OPENGL_ES2_BIT == 0) + { + continue; + } + + if version.0 == 1 && (renderable & ffi::egl::OPENGL_ES_BIT == 0 || + conformant & ffi::egl::OPENGL_ES_BIT == 0) + { + continue; + } + } + + } else if api == Api::OpenGl { + if renderable & ffi::egl::OPENGL_BIT == 0 || + conformant & ffi::egl::OPENGL_BIT == 0 + { + continue; + } + } + + if attrib!(egl, display, config_id, ffi::egl::SURFACE_TYPE) & ffi::egl::WINDOW_BIT as i32 == 0 { + continue; + } + + if attrib!(egl, display, config_id, ffi::egl::TRANSPARENT_TYPE) != ffi::egl::NONE as i32 { + continue; + } + + if attrib!(egl, display, config_id, ffi::egl::COLOR_BUFFER_TYPE) != ffi::egl::RGB_BUFFER as i32 { + continue; + } + + result.push((config_id, PixelFormat { + hardware_accelerated: attrib!(egl, display, config_id, ffi::egl::CONFIG_CAVEAT) + != ffi::egl::SLOW_CONFIG as i32, + red_bits: attrib!(egl, display, config_id, ffi::egl::RED_SIZE) as u8, + green_bits: attrib!(egl, display, config_id, ffi::egl::BLUE_SIZE) as u8, + blue_bits: 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(result) +} + +unsafe fn create_context(egl: &ffi::egl::Egl, display: ffi::egl::types::EGLDisplay, + egl_version: &(ffi::egl::types::EGLint, ffi::egl::types::EGLint), + api: Api, version: (u8, u8), config_id: ffi::egl::types::EGLConfig, + gl_debug: bool) + -> Result<ffi::egl::types::EGLContext, ()> +{ + let mut context_attributes = vec![]; + + if egl_version >= &(1, 5) { + context_attributes.push(ffi::egl::CONTEXT_MAJOR_VERSION as i32); + context_attributes.push(version.0 as i32); + context_attributes.push(ffi::egl::CONTEXT_MINOR_VERSION as i32); + context_attributes.push(version.1 as i32); + + if gl_debug { + context_attributes.push(ffi::egl::CONTEXT_OPENGL_DEBUG as i32); + context_attributes.push(ffi::egl::TRUE as i32); + } + + } else { + if api == Api::OpenGlEs { + context_attributes.push(ffi::egl::CONTEXT_CLIENT_VERSION as i32); + context_attributes.push(version.0 as i32); + } + } + + context_attributes.push(ffi::egl::NONE as i32); + + let context = egl.CreateContext(display, config_id, ptr::null(), + context_attributes.as_ptr()); + + if context.is_null() { + return Err(()); + } + + Ok(context) +} |