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Rearrange remaining bits of GlyphEntry

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This commit is contained in:
Matt Brubeck 2015-08-28 11:09:18 -07:00
parent 9d4f5880d3
commit 4d32e8b20e
1 changed files with 9 additions and 11 deletions
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20
components/gfx/text/glyph.rs
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@ -58,7 +58,7 @@ impl GlyphEntry {
starts_ligature, starts_ligature,
glyph_count); glyph_count);
GlyphEntry::new((glyph_count as u32) << GLYPH_COUNT_SHIFT) GlyphEntry::new(glyph_count as u32)
} }
/// Create a GlyphEntry for the case where glyphs couldn't be found for the specified /// Create a GlyphEntry for the case where glyphs couldn't be found for the specified
@ -66,7 +66,7 @@ impl GlyphEntry {
fn missing(glyph_count: usize) -> GlyphEntry { fn missing(glyph_count: usize) -> GlyphEntry {
assert!(glyph_count <= u16::MAX as usize); assert!(glyph_count <= u16::MAX as usize);
GlyphEntry::new((glyph_count as u32) << GLYPH_COUNT_SHIFT) GlyphEntry::new(glyph_count as u32)
} }
} }
@ -75,14 +75,13 @@ pub type GlyphId = u32;
// TODO: make this more type-safe. // TODO: make this more type-safe.
static FLAG_CHAR_IS_SPACE: u32 = 0x10000000; const FLAG_CHAR_IS_SPACE: u32 = 0x40000000;
// These two bits store some BREAK_TYPE_* flags const FLAG_IS_SIMPLE_GLYPH: u32 = 0x80000000;
static FLAG_IS_SIMPLE_GLYPH: u32 = 0x80000000;
// glyph advance; in Au's. // glyph advance; in Au's.
static GLYPH_ADVANCE_MASK: u32 = 0x0FFF0000; const GLYPH_ADVANCE_MASK: u32 = 0x3FFF0000;
static GLYPH_ADVANCE_SHIFT: u32 = 16; const GLYPH_ADVANCE_SHIFT: u32 = 16;
static GLYPH_ID_MASK: u32 = 0x0000FFFF; const GLYPH_ID_MASK: u32 = 0x0000FFFF;
// Non-simple glyphs (more than one glyph per char; missing glyph, // Non-simple glyphs (more than one glyph per char; missing glyph,
// newline, tab, large advance, or nonzero x/y offsets) may have one // newline, tab, large advance, or nonzero x/y offsets) may have one
@ -91,8 +90,7 @@ static GLYPH_ID_MASK: u32 = 0x0000FFFF;
// unicode char. // unicode char.
// The number of detailed glyphs for this char. // The number of detailed glyphs for this char.
static GLYPH_COUNT_MASK: u32 = 0x00FFFF00; const GLYPH_COUNT_MASK: u32 = 0x0000FFFF;
static GLYPH_COUNT_SHIFT: u32 = 8;
fn is_simple_glyph_id(id: GlyphId) -> bool { fn is_simple_glyph_id(id: GlyphId) -> bool {
((id as u32) & GLYPH_ID_MASK) == id ((id as u32) & GLYPH_ID_MASK) == id
@ -132,7 +130,7 @@ impl GlyphEntry {
fn glyph_count(&self) -> u16 { fn glyph_count(&self) -> u16 {
assert!(!self.is_simple()); assert!(!self.is_simple());
((self.value & GLYPH_COUNT_MASK) >> GLYPH_COUNT_SHIFT) as u16 (self.value & GLYPH_COUNT_MASK) as u16
} }
#[inline(always)] #[inline(always)]