102 lines
3.3 KiB
Zig
102 lines
3.3 KiB
Zig
const std = @import("std");
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const options = @import("main.zig").options;
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const run = @import("shaper/run.zig");
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const feature = @import("shaper/feature.zig");
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const configpkg = @import("../config.zig");
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const terminal = @import("../terminal/main.zig");
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const SharedGrid = @import("main.zig").SharedGrid;
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pub const noop = @import("shaper/noop.zig");
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pub const harfbuzz = @import("shaper/harfbuzz.zig");
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pub const coretext = @import("shaper/coretext.zig");
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pub const web_canvas = @import("shaper/web_canvas.zig");
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pub const Cache = @import("shaper/Cache.zig");
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pub const TextRun = run.TextRun;
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pub const RunIterator = run.RunIterator;
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pub const Feature = feature.Feature;
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pub const FeatureList = feature.FeatureList;
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pub const default_features = feature.default_features;
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/// Shaper implementation for our compile options.
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pub const Shaper = switch (options.backend) {
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.freetype,
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.fontconfig_freetype,
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.coretext_freetype,
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.coretext_harfbuzz,
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=> harfbuzz.Shaper,
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// Note that coretext_freetype cannot use the coretext
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// shaper because the coretext shaper requests CoreText
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// font faces.
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.coretext => coretext.Shaper,
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.coretext_noshape => noop.Shaper,
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.web_canvas => web_canvas.Shaper,
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};
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/// A cell is a single single within a terminal that should be rendered
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/// for a shaping call. Note all terminal cells may be present; only
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/// cells that have a glyph that needs to be rendered.
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pub const Cell = struct {
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/// The X position of this shaper cell relative to the offset of the
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/// run. Because runs are always within a single row, it is expected
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/// that the caller can reconstruct the full position of the cell by
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/// using the known Y position of the cell and adding the X position
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/// to the run offset.
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x: u16,
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/// An additional offset to apply to the rendering.
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x_offset: i16 = 0,
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y_offset: i16 = 0,
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/// The glyph index for this cell. The font index to use alongside
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/// this cell is available in the text run. This glyph index is only
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/// valid for a given GroupCache and FontIndex that was used to create
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/// the runs.
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glyph_index: u32,
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};
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/// Options for shapers.
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pub const Options = struct {
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/// Font features to use when shaping.
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///
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/// Note: eventually, this will move to font.Face probably as we may
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/// want to support per-face feature configuration. For now, we only
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/// support applying features globally.
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features: []const []const u8 = &.{},
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};
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/// Options for runIterator.
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pub const RunOptions = struct {
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/// The font state for the terminal screen. This is mutable because
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/// cached values may be updated during shaping.
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grid: *SharedGrid,
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/// The cells for the row to shape.
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cells: std.MultiArrayList(terminal.RenderState.Cell).Slice = .empty,
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/// The x boundaries of the selection in this row.
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selection: ?[2]u16 = null,
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/// The cursor position within this row. This is used to break shaping
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/// on cursor boundaries. This can be disabled by setting this to
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/// null.
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cursor_x: ?usize = null,
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/// Apply the font break configuration to the run.
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pub fn applyBreakConfig(
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self: *RunOptions,
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config: configpkg.FontShapingBreak,
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) void {
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if (!config.cursor) self.cursor_x = null;
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}
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};
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test {
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_ = Cache;
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_ = Shaper;
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// Always test noop
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_ = noop;
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}
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