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LibGfx/OpenType: Move Glyf composite flag enum to header file

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This will allow us to use it for WOFF2 decompression.
This commit is contained in:
Andreas Kling 2023-08-12 11:58:46 +02:00
parent bb52d76be3
commit 8ac30aa318
2 changed files with 24 additions and 24 deletions
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33
Userland/Libraries/LibGfx/Font/OpenType/Glyf.cpp
View file

@ -36,21 +36,6 @@ enum class SimpleGlyfFlags {
YPositiveShortVector = 0x24,
};
enum class CompositeGlyfFlags {
Arg1AndArg2AreWords = 0x0001,
ArgsAreXYValues = 0x0002,
RoundXYToGrid = 0x0004,
WeHaveAScale = 0x0008,
MoreComponents = 0x0020,
WeHaveAnXAndYScale = 0x0040,
WeHaveATwoByTwo = 0x0080,
WeHaveInstructions = 0x0100,
UseMyMetrics = 0x0200,
OverlapCompound = 0x0400, // Not relevant - can overlap without this set
ScaledComponentOffset = 0x0800,
UnscaledComponentOffset = 0x1000,
};
class PointIterator {
public:
struct Item {
@ -139,7 +124,7 @@ Optional<Glyf::Glyph::ComponentIterator::Item> Glyf::Glyph::ComponentIterator::n
u16 glyph_id = be_u16(m_slice.offset_pointer(m_offset));
m_offset += 2;
i16 arg1 = 0, arg2 = 0;
if (flags & (u16)CompositeGlyfFlags::Arg1AndArg2AreWords) {
if (flags & (u16)CompositeFlags::Arg1AndArg2AreWords) {
arg1 = be_i16(m_slice.offset_pointer(m_offset));
m_offset += 2;
arg2 = be_i16(m_slice.offset_pointer(m_offset));
@ -149,7 +134,7 @@ Optional<Glyf::Glyph::ComponentIterator::Item> Glyf::Glyph::ComponentIterator::n
arg2 = (i8)m_slice[m_offset++];
}
float a = 1.0, b = 0.0, c = 0.0, d = 1.0, e = 0.0, f = 0.0;
if (flags & (u16)CompositeGlyfFlags::WeHaveATwoByTwo) {
if (flags & (u16)CompositeFlags::WeHaveATwoByTwo) {
a = be_fword(m_slice.offset_pointer(m_offset));
m_offset += 2;
b = be_fword(m_slice.offset_pointer(m_offset));
@ -158,33 +143,33 @@ Optional<Glyf::Glyph::ComponentIterator::Item> Glyf::Glyph::ComponentIterator::n
m_offset += 2;
d = be_fword(m_slice.offset_pointer(m_offset));
m_offset += 2;
} else if (flags & (u16)CompositeGlyfFlags::WeHaveAnXAndYScale) {
} else if (flags & (u16)CompositeFlags::WeHaveAnXAndYScale) {
a = be_fword(m_slice.offset_pointer(m_offset));
m_offset += 2;
d = be_fword(m_slice.offset_pointer(m_offset));
m_offset += 2;
} else if (flags & (u16)CompositeGlyfFlags::WeHaveAScale) {
} else if (flags & (u16)CompositeFlags::WeHaveAScale) {
a = be_fword(m_slice.offset_pointer(m_offset));
m_offset += 2;
d = a;
}
// FIXME: Handle UseMyMetrics, ScaledComponentOffset, UnscaledComponentOffset, non-ArgsAreXYValues
if (flags & (u16)CompositeGlyfFlags::ArgsAreXYValues) {
if (flags & (u16)CompositeFlags::ArgsAreXYValues) {
e = arg1;
f = arg2;
} else {
// FIXME: Implement this. There's no TODO() here since many fonts work just fine without this.
}
if (flags & (u16)CompositeGlyfFlags::UseMyMetrics) {
if (flags & (u16)CompositeFlags::UseMyMetrics) {
// FIXME: Implement this. There's no TODO() here since many fonts work just fine without this.
}
if (flags & (u16)CompositeGlyfFlags::ScaledComponentOffset) {
if (flags & (u16)CompositeFlags::ScaledComponentOffset) {
// FIXME: Implement this. There's no TODO() here since many fonts work just fine without this.
}
if (flags & (u16)CompositeGlyfFlags::UnscaledComponentOffset) {
if (flags & (u16)CompositeFlags::UnscaledComponentOffset) {
// FIXME: Implement this. There's no TODO() here since many fonts work just fine without this.
}
m_has_more = (flags & (u16)CompositeGlyfFlags::MoreComponents);
m_has_more = (flags & (u16)CompositeFlags::MoreComponents);
return Item {
.glyph_id = glyph_id,
.affine = Gfx::AffineTransform(a, b, c, d, e, f),

15
Userland/Libraries/LibGfx/Font/OpenType/Glyf.h
View file

@ -42,6 +42,21 @@ private:
// glyf: Glyph Data
class Glyf {
public:
enum class CompositeFlags {
Arg1AndArg2AreWords = 0x0001,
ArgsAreXYValues = 0x0002,
RoundXYToGrid = 0x0004,
WeHaveAScale = 0x0008,
MoreComponents = 0x0020,
WeHaveAnXAndYScale = 0x0040,
WeHaveATwoByTwo = 0x0080,
WeHaveInstructions = 0x0100,
UseMyMetrics = 0x0200,
OverlapCompound = 0x0400, // Not relevant - can overlap without this set
ScaledComponentOffset = 0x0800,
UnscaledComponentOffset = 0x1000,
};
class Glyph {
public:
Glyph(ReadonlyBytes slice, i16 xmin, i16 ymin, i16 xmax, i16 ymax, i16 num_contours = -1)