Break out mod paint into new crate epaint

epaint/src/lib.rs

@@ -0,0 +1,103 @@
+//! 2D graphics/rendering. Fonts, textures, color, geometry, tessellation etc.
+
+#![cfg_attr(not(debug_assertions), deny(warnings))] // Forbid warnings in release builds
+#![forbid(unsafe_code)]
+#![warn(
+    clippy::all,
+    clippy::await_holding_lock,
+    clippy::dbg_macro,
+    clippy::doc_markdown,
+    clippy::empty_enum,
+    clippy::enum_glob_use,
+    clippy::exit,
+    clippy::filter_map_next,
+    clippy::fn_params_excessive_bools,
+    clippy::if_let_mutex,
+    clippy::imprecise_flops,
+    clippy::inefficient_to_string,
+    clippy::linkedlist,
+    clippy::lossy_float_literal,
+    clippy::macro_use_imports,
+    clippy::match_on_vec_items,
+    clippy::match_wildcard_for_single_variants,
+    clippy::mem_forget,
+    clippy::mismatched_target_os,
+    clippy::missing_errors_doc,
+    clippy::missing_safety_doc,
+    clippy::needless_borrow,
+    clippy::needless_continue,
+    clippy::needless_pass_by_value,
+    clippy::option_option,
+    clippy::pub_enum_variant_names,
+    clippy::rest_pat_in_fully_bound_structs,
+    clippy::todo,
+    clippy::unimplemented,
+    clippy::unnested_or_patterns,
+    clippy::verbose_file_reads,
+    future_incompatible,
+    missing_crate_level_docs,
+    missing_doc_code_examples,
+    // missing_docs,
+    nonstandard_style,
+    rust_2018_idioms,
+    unused_doc_comments,
+)]
+#![allow(clippy::manual_range_contains)]
+
+pub mod color;
+pub mod mutex;
+mod shadow;
+pub mod shape;
+pub mod stats;
+mod stroke;
+pub mod tessellator;
+pub mod text;
+mod texture_atlas;
+mod triangles;
+
+pub use {
+    color::{Color32, Rgba},
+    shadow::Shadow,
+    shape::Shape,
+    stats::PaintStats,
+    stroke::Stroke,
+    tessellator::{PaintJob, PaintJobs, TessellationOptions},
+    text::{Galley, TextStyle},
+    texture_atlas::{Texture, TextureAtlas},
+    triangles::{Triangles, Vertex},
+};
+
+pub use ahash;
+pub use emath;
+
+/// The UV coordinate of a white region of the texture mesh.
+/// The default Egui texture has the top-left corner pixel fully white.
+/// You need need use a clamping texture sampler for this to work
+/// (so it doesn't do bilinear blending with bottom right corner).
+pub const WHITE_UV: emath::Pos2 = emath::pos2(0.0, 0.0);
+
+/// What texture to use in a [`Triangles`] mesh.
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum TextureId {
+    /// The Egui font texture.
+    /// If you don't want to use a texture, pick this and the [`WHITE_UV`] for uv-coord.
+    Egui,
+
+    /// Your own texture, defined in any which way you want.
+    /// Egui won't care. The backend renderer will presumably use this to look up what texture to use.
+    User(u64),
+}
+
+impl Default for TextureId {
+    fn default() -> Self {
+        Self::Egui
+    }
+}
+
+pub(crate) struct PaintRect {
+    pub rect: emath::Rect,
+    /// How rounded the corners are. Use `0.0` for no rounding.
+    pub corner_radius: f32,
+    pub fill: Color32,
+    pub stroke: Stroke,
+}