diff --git a/src/backend/egl/display.rs b/src/backend/egl/display.rs index f8482c8..e0d591a 100644 --- a/src/backend/egl/display.rs +++ b/src/backend/egl/display.rs @@ -1,5 +1,6 @@ //! Type safe native types for safe egl initialisation +use std::collections::HashSet; use std::sync::Arc; use std::ffi::CStr; use std::mem::MaybeUninit; @@ -11,7 +12,7 @@ use wayland_server::{protocol::wl_buffer::WlBuffer, Display}; #[cfg(feature = "use_system_lib")] use wayland_sys::server::wl_display; -use crate::backend::allocator::{Buffer, dmabuf::Dmabuf}; +use crate::backend::allocator::{Buffer, dmabuf::Dmabuf, Fourcc, Modifier}; use crate::backend::egl::{ ffi::egl::types::EGLImage, ffi, wrap_egl_call, EGLError, Error, @@ -54,6 +55,8 @@ pub struct EGLDisplay { pub(crate) display: Arc, pub(crate) egl_version: (i32, i32), pub(crate) extensions: Vec, + pub(crate) dmabuf_import_formats: HashSet<(u32, u64)>, + pub(crate) dmabuf_render_formats: HashSet<(u32, u64)>, surface_type: ffi::EGLint, logger: slog::Logger, } @@ -137,6 +140,9 @@ impl EGLDisplay { }; info!(log, "Supported EGL display extensions: {:?}", extensions); + let (dmabuf_import_formats, dmabuf_render_formats) = + get_dmabuf_formats(&display, &extensions, &log).map_err(Error::DisplayCreationError)?; + // egl <= 1.2 does not support OpenGL ES (maybe we want to support OpenGL in the future?) if egl_version <= (1, 2) { return Err(Error::OpenGlesNotSupported(None)); @@ -149,6 +155,8 @@ impl EGLDisplay { surface_type: native.surface_type(), egl_version, extensions, + dmabuf_import_formats, + dmabuf_render_formats, logger: log, }) } @@ -456,6 +464,89 @@ impl EGLDisplay { } } +fn get_dmabuf_formats(display: &ffi::egl::types::EGLDisplay, extensions: &[String], log: &::slog::Logger) -> Result<(HashSet<(u32, u64)>, HashSet<(u32, u64)>), EGLError> +{ + use std::convert::TryFrom; + + if !extensions.iter().any(|s| s == "EGL_EXT_image_dma_buf_import") { + warn!(log, "Dmabuf import extension not available"); + return Ok((HashSet::new(), HashSet::new())); + } + + let formats = { + // when we only have the image_dmabuf_import extension we can't query + // which formats are supported. These two are on almost always + // supported; it's the intended way to just try to create buffers. + // Just a guess but better than not supporting dmabufs at all, + // given that the modifiers extension isn't supported everywhere. + if !extensions.iter().any(|s| s == "EGL_EXT_image_dma_buf_import_modifiers") { + vec![ + Fourcc::Argb8888 as u32, + Fourcc::Xrgb8888 as u32, + ] + } else { + let mut num = 0i32; + wrap_egl_call(|| unsafe { + ffi::egl::QueryDmaBufFormatsEXT(*display, 0, std::ptr::null_mut(), &mut num as *mut _) + })?; + if num == 0 { + return Ok((HashSet::new(), HashSet::new())); + } + let mut formats: Vec = Vec::with_capacity(num as usize); + wrap_egl_call(|| unsafe { + ffi::egl::QueryDmaBufFormatsEXT(*display, num, formats.as_mut_ptr() as *mut _, &mut num as *mut _) + })?; + unsafe { + formats.set_len(num as usize); + } + formats + } + }; + + let mut texture_formats = HashSet::new(); + let mut render_formats = HashSet::new(); + + for format in formats { + let mut num = 0i32; + wrap_egl_call(|| unsafe { + ffi::egl::QueryDmaBufModifiersEXT(*display, format as i32, 0, std::ptr::null_mut(), std::ptr::null_mut(), &mut num as *mut _) + })?; + + if num == 0 { + texture_formats.insert((format, Modifier::Invalid.into())); + render_formats.insert((format, Modifier::Invalid.into())); + } else { + let mut mods: Vec = Vec::with_capacity(num as usize); + let mut external: Vec = Vec::with_capacity(num as usize); + + wrap_egl_call(|| unsafe { + ffi::egl::QueryDmaBufModifiersEXT(*display, format as i32, num, mods.as_mut_ptr(), external.as_mut_ptr(), &mut num as *mut _) + })?; + + unsafe { + mods.set_len(num as usize); + external.set_len(num as usize); + } + + for (modifier, external_only) in mods.into_iter().zip(external.into_iter()) { + texture_formats.insert((format, modifier)); + if external_only == 0 { + render_formats.insert((format, modifier)); + } + } + } + } + + info!(log, "Supported dmabuf import formats: {:#?}", + texture_formats.clone().into_iter() + .map(|(fmt, modi)| (Fourcc::try_from(fmt), Modifier::from(modi))).collect::>()); + info!(log, "Supported dmabuf render formats: {:#?}", + render_formats.clone().into_iter() + .map(|(fmt, modi)| (Fourcc::try_from(fmt), Modifier::from(modi))).collect::>()); + + Ok((texture_formats, render_formats)) +} + /// Type to receive [`EGLImages`] for EGL-based [`WlBuffer`]s. /// /// Can be created by using [`EGLGraphicsBackend::bind_wl_display`].