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gfx: Make display lists serializable using serde.

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This commit introduces the `serde` dependency, which we will use to
serialize messages going between processes in multiprocess Servo.

This also adds a new debugging flag, `-Z print-display-list-json`,
allowing the output of display list serialization to be visualized.
This will be useful for our experiments with alternate rasterizers.
This commit is contained in:
Patrick Walton 2015-07-08 16:15:23 -07:00
parent b6b95085fb
commit 6eacb0c995
30 changed files with 320 additions and 124 deletions
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12
components/gfx/text/glyph.rs
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@ -19,7 +19,7 @@ use util::vec::*;
/// In the uncommon case (multiple glyphs per unicode character, large glyph index/advance, or
/// glyph offsets), we pack the glyph count into GlyphEntry, and store the other glyph information
/// in DetailedGlyphStore.
#[derive(Clone, Debug, Copy)]
#[derive(Clone, Debug, Copy, Deserialize, Serialize)]
struct GlyphEntry {
value: u32,
}
@ -250,7 +250,7 @@ impl GlyphEntry {
// Stores data for a detailed glyph, in the case that several glyphs
// correspond to one character, or the glyph's data couldn't be packed.
#[derive(Clone, Debug, Copy)]
#[derive(Clone, Debug, Copy, Deserialize, Serialize)]
struct DetailedGlyph {
id: GlyphId,
// glyph's advance, in the text's direction (LTR or RTL)
@ -269,7 +269,7 @@ impl DetailedGlyph {
}
}
#[derive(PartialEq, Clone, Eq, Debug, Copy)]
#[derive(PartialEq, Clone, Eq, Debug, Copy, Deserialize, Serialize)]
struct DetailedGlyphRecord {
// source string offset/GlyphEntry offset in the TextRun
entry_offset: CharIndex,
@ -293,7 +293,7 @@ impl Ord for DetailedGlyphRecord {
// until a lookup is actually performed; this matches the expected
// usage pattern of setting/appending all the detailed glyphs, and
// then querying without setting.
#[derive(Clone)]
#[derive(Clone, Deserialize, Serialize)]
struct DetailedGlyphStore {
// TODO(pcwalton): Allocation of this buffer is expensive. Consider a small-vector
// optimization.
@ -500,7 +500,7 @@ impl<'a> GlyphInfo<'a> {
/// | +---+---+ |
/// +---------------------------------------------+
/// ~~~
#[derive(Clone)]
#[derive(Clone, Deserialize, Serialize)]
pub struct GlyphStore {
// TODO(pcwalton): Allocation of this buffer is expensive. Consider a small-vector
// optimization.
@ -515,7 +515,7 @@ pub struct GlyphStore {
}
int_range_index! {
#[derive(RustcEncodable)]
#[derive(Deserialize, Serialize, RustcEncodable)]
#[doc = "An index that refers to a character in a text run. This could \
point to the middle of a glyph."]
#[derive(HeapSizeOf)]