mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 20:37:35 +00:00
Libraries: Move to Userland/Libraries/
This commit is contained in:
Andreas Kling
parent
dc28c07fa5
commit
13d7c09125
1857 changed files with 266 additions and 274 deletions
|
|
@ -1,519 +0,0 @@
|
|||
/*
|
||||
* Copyright (c) 2020, Srimanta Barua <srimanta.barua1@gmail.com>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright notice, this
|
||||
* list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <LibGfx/Path.h>
|
||||
#include <LibGfx/Point.h>
|
||||
#include <LibTTF/Glyf.h>
|
||||
|
||||
namespace TTF {
|
||||
|
||||
extern u16 be_u16(const u8* ptr);
|
||||
extern u32 be_u32(const u8* ptr);
|
||||
extern i16 be_i16(const u8* ptr);
|
||||
extern float be_fword(const u8* ptr);
|
||||
|
||||
enum class SimpleGlyfFlags {
|
||||
// From spec.
|
||||
OnCurve = 0x01,
|
||||
XShortVector = 0x02,
|
||||
YShortVector = 0x04,
|
||||
RepeatFlag = 0x08,
|
||||
XIsSameOrPositiveXShortVector = 0x10,
|
||||
YIsSameOrPositiveYShortVector = 0x20,
|
||||
// Combinations
|
||||
XMask = 0x12,
|
||||
YMask = 0x24,
|
||||
XLongVector = 0x00,
|
||||
YLongVector = 0x00,
|
||||
XNegativeShortVector = 0x02,
|
||||
YNegativeShortVector = 0x04,
|
||||
XPositiveShortVector = 0x12,
|
||||
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 {
|
||||
bool on_curve;
|
||||
Gfx::FloatPoint point;
|
||||
};
|
||||
|
||||
PointIterator(const ReadonlyBytes& slice, u16 num_points, u32 flags_offset, u32 x_offset, u32 y_offset, Gfx::AffineTransform affine)
|
||||
: m_slice(slice)
|
||||
, m_points_remaining(num_points)
|
||||
, m_flags_offset(flags_offset)
|
||||
, m_x_offset(x_offset)
|
||||
, m_y_offset(y_offset)
|
||||
, m_affine(affine)
|
||||
{
|
||||
}
|
||||
|
||||
Optional<Item> next()
|
||||
{
|
||||
if (m_points_remaining == 0) {
|
||||
return {};
|
||||
}
|
||||
if (m_flags_remaining > 0) {
|
||||
m_flags_remaining--;
|
||||
} else {
|
||||
m_flag = m_slice[m_flags_offset++];
|
||||
if (m_flag & (u8)SimpleGlyfFlags::RepeatFlag) {
|
||||
m_flags_remaining = m_slice[m_flags_offset++];
|
||||
}
|
||||
}
|
||||
switch (m_flag & (u8)SimpleGlyfFlags::XMask) {
|
||||
case (u8)SimpleGlyfFlags::XLongVector:
|
||||
m_last_point.set_x(m_last_point.x() + be_i16(m_slice.offset_pointer(m_x_offset)));
|
||||
m_x_offset += 2;
|
||||
break;
|
||||
case (u8)SimpleGlyfFlags::XNegativeShortVector:
|
||||
m_last_point.set_x(m_last_point.x() - m_slice[m_x_offset++]);
|
||||
break;
|
||||
case (u8)SimpleGlyfFlags::XPositiveShortVector:
|
||||
m_last_point.set_x(m_last_point.x() + m_slice[m_x_offset++]);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
switch (m_flag & (u8)SimpleGlyfFlags::YMask) {
|
||||
case (u8)SimpleGlyfFlags::YLongVector:
|
||||
m_last_point.set_y(m_last_point.y() + be_i16(m_slice.offset_pointer(m_y_offset)));
|
||||
m_y_offset += 2;
|
||||
break;
|
||||
case (u8)SimpleGlyfFlags::YNegativeShortVector:
|
||||
m_last_point.set_y(m_last_point.y() - m_slice[m_y_offset++]);
|
||||
break;
|
||||
case (u8)SimpleGlyfFlags::YPositiveShortVector:
|
||||
m_last_point.set_y(m_last_point.y() + m_slice[m_y_offset++]);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
m_points_remaining--;
|
||||
Item ret = {
|
||||
.on_curve = (m_flag & (u8)SimpleGlyfFlags::OnCurve) != 0,
|
||||
.point = m_affine.map(m_last_point),
|
||||
};
|
||||
return ret;
|
||||
}
|
||||
|
||||
private:
|
||||
ReadonlyBytes m_slice;
|
||||
u16 m_points_remaining;
|
||||
u8 m_flag { 0 };
|
||||
Gfx::FloatPoint m_last_point = { 0.0f, 0.0f };
|
||||
u32 m_flags_remaining = { 0 };
|
||||
u32 m_flags_offset;
|
||||
u32 m_x_offset;
|
||||
u32 m_y_offset;
|
||||
Gfx::AffineTransform m_affine;
|
||||
};
|
||||
|
||||
Optional<Glyf::Glyph::ComponentIterator::Item> Glyf::Glyph::ComponentIterator::next()
|
||||
{
|
||||
if (!m_has_more) {
|
||||
return {};
|
||||
}
|
||||
u16 flags = be_u16(m_slice.offset_pointer(m_offset));
|
||||
m_offset += 2;
|
||||
u16 glyph_id = be_u16(m_slice.offset_pointer(m_offset));
|
||||
m_offset += 2;
|
||||
i16 arg1 = 0, arg2 = 0;
|
||||
if (flags & (u16)CompositeGlyfFlags::Arg1AndArg2AreWords) {
|
||||
arg1 = be_i16(m_slice.offset_pointer(m_offset));
|
||||
m_offset += 2;
|
||||
arg2 = be_i16(m_slice.offset_pointer(m_offset));
|
||||
m_offset += 2;
|
||||
} else {
|
||||
arg1 = (i8)m_slice[m_offset++];
|
||||
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) {
|
||||
a = be_fword(m_slice.offset_pointer(m_offset));
|
||||
m_offset += 2;
|
||||
b = be_fword(m_slice.offset_pointer(m_offset));
|
||||
m_offset += 2;
|
||||
c = 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::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) {
|
||||
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) {
|
||||
e = arg1;
|
||||
f = arg2;
|
||||
} else {
|
||||
TODO();
|
||||
}
|
||||
if (flags & (u16)CompositeGlyfFlags::UseMyMetrics) {
|
||||
TODO();
|
||||
}
|
||||
if (flags & (u16)CompositeGlyfFlags::ScaledComponentOffset) {
|
||||
TODO();
|
||||
}
|
||||
if (flags & (u16)CompositeGlyfFlags::UnscaledComponentOffset) {
|
||||
TODO();
|
||||
}
|
||||
m_has_more = (flags & (u16)CompositeGlyfFlags::MoreComponents);
|
||||
return Item {
|
||||
.glyph_id = glyph_id,
|
||||
.affine = Gfx::AffineTransform(a, b, c, d, e, f),
|
||||
};
|
||||
}
|
||||
|
||||
Rasterizer::Rasterizer(Gfx::IntSize size)
|
||||
: m_size(size)
|
||||
{
|
||||
m_data.resize(m_size.width() * m_size.height());
|
||||
for (int i = 0; i < m_size.width() * m_size.height(); i++) {
|
||||
m_data[i] = 0.0;
|
||||
}
|
||||
}
|
||||
|
||||
void Rasterizer::draw_path(Gfx::Path& path)
|
||||
{
|
||||
for (auto& line : path.split_lines()) {
|
||||
draw_line(line.from, line.to);
|
||||
}
|
||||
}
|
||||
|
||||
RefPtr<Gfx::Bitmap> Rasterizer::accumulate()
|
||||
{
|
||||
auto bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::RGBA32, m_size);
|
||||
Color base_color = Color::from_rgb(0xffffff);
|
||||
for (int y = 0; y < m_size.height(); y++) {
|
||||
float accumulator = 0.0;
|
||||
for (int x = 0; x < m_size.width(); x++) {
|
||||
accumulator += m_data[y * m_size.width() + x];
|
||||
float value = accumulator;
|
||||
if (value < 0.0) {
|
||||
value = -value;
|
||||
}
|
||||
if (value > 1.0) {
|
||||
value = 1.0;
|
||||
}
|
||||
u8 alpha = value * 255.0;
|
||||
bitmap->set_pixel(x, y, base_color.with_alpha(alpha));
|
||||
}
|
||||
}
|
||||
return bitmap;
|
||||
}
|
||||
|
||||
void Rasterizer::draw_line(Gfx::FloatPoint p0, Gfx::FloatPoint p1)
|
||||
{
|
||||
// FIXME: Shift x and y according to dy/dx
|
||||
if (p0.x() < 0.0) {
|
||||
p0.set_x(roundf(p0.x()));
|
||||
}
|
||||
if (p0.y() < 0.0) {
|
||||
p0.set_y(roundf(p0.y()));
|
||||
}
|
||||
if (p1.x() < 0.0) {
|
||||
p1.set_x(roundf(p1.x()));
|
||||
}
|
||||
if (p1.y() < 0.0) {
|
||||
p1.set_y(roundf(p1.y()));
|
||||
}
|
||||
|
||||
if (!(p0.x() >= 0.0 && p0.y() >= 0.0 && p0.x() <= m_size.width() && p0.y() <= m_size.height())) {
|
||||
dbgln("!P0({},{})", p0.x(), p0.y());
|
||||
return;
|
||||
}
|
||||
|
||||
if (!(p1.x() >= 0.0 && p1.y() >= 0.0 && p1.x() <= m_size.width() && p1.y() <= m_size.height())) {
|
||||
dbgln("!P1({},{})", p1.x(), p1.y());
|
||||
return;
|
||||
}
|
||||
|
||||
ASSERT(p0.x() >= 0.0 && p0.y() >= 0.0 && p0.x() <= m_size.width() && p0.y() <= m_size.height());
|
||||
ASSERT(p1.x() >= 0.0 && p1.y() >= 0.0 && p1.x() <= m_size.width() && p1.y() <= m_size.height());
|
||||
|
||||
// If we're on the same Y, there's no need to draw
|
||||
if (p0.y() == p1.y()) {
|
||||
return;
|
||||
}
|
||||
|
||||
float direction = -1.0;
|
||||
if (p1.y() < p0.y()) {
|
||||
direction = 1.0;
|
||||
auto tmp = p0;
|
||||
p0 = p1;
|
||||
p1 = tmp;
|
||||
}
|
||||
|
||||
float dxdy = (p1.x() - p0.x()) / (p1.y() - p0.y());
|
||||
u32 y0 = floor(p0.y());
|
||||
u32 y1 = ceil(p1.y());
|
||||
float x_cur = p0.x();
|
||||
|
||||
for (u32 y = y0; y < y1; y++) {
|
||||
u32 line_offset = m_size.width() * y;
|
||||
|
||||
float dy = min(y + 1.0f, p1.y()) - max((float)y, p0.y());
|
||||
float directed_dy = dy * direction;
|
||||
float x_next = x_cur + dy * dxdy;
|
||||
if (x_next < 0.0) {
|
||||
x_next = 0.0;
|
||||
}
|
||||
float x0 = x_cur;
|
||||
float x1 = x_next;
|
||||
if (x1 < x0) {
|
||||
x1 = x_cur;
|
||||
x0 = x_next;
|
||||
}
|
||||
float x0_floor = floor(x0);
|
||||
float x1_ceil = ceil(x1);
|
||||
u32 x0i = x0_floor;
|
||||
|
||||
if (x1_ceil <= x0_floor + 1.0) {
|
||||
// If x0 and x1 are within the same pixel, then area to the right is (1 - (mid(x0, x1) - x0_floor)) * dy
|
||||
float area = ((x0 + x1) * 0.5) - x0_floor;
|
||||
m_data[line_offset + x0i] += directed_dy * (1.0 - area);
|
||||
m_data[line_offset + x0i + 1] += directed_dy * area;
|
||||
} else {
|
||||
float dydx = 1.0 / dxdy;
|
||||
float x0_right = 1.0 - (x0 - x0_floor);
|
||||
u32 x1_floor_i = floor(x1);
|
||||
float area_upto_here = 0.5 * x0_right * x0_right * dydx;
|
||||
m_data[line_offset + x0i] += direction * area_upto_here;
|
||||
for (u32 x = x0i + 1; x < x1_floor_i; x++) {
|
||||
x0_right += 1.0;
|
||||
float total_area_here = 0.5 * x0_right * x0_right * dydx;
|
||||
m_data[line_offset + x] += direction * (total_area_here - area_upto_here);
|
||||
area_upto_here = total_area_here;
|
||||
}
|
||||
m_data[line_offset + x1_floor_i] += direction * (dy - area_upto_here);
|
||||
}
|
||||
|
||||
x_cur = x_next;
|
||||
}
|
||||
}
|
||||
|
||||
Optional<Loca> Loca::from_slice(const ReadonlyBytes& slice, u32 num_glyphs, IndexToLocFormat index_to_loc_format)
|
||||
{
|
||||
switch (index_to_loc_format) {
|
||||
case IndexToLocFormat::Offset16:
|
||||
if (slice.size() < num_glyphs * 2) {
|
||||
return {};
|
||||
}
|
||||
break;
|
||||
case IndexToLocFormat::Offset32:
|
||||
if (slice.size() < num_glyphs * 4) {
|
||||
return {};
|
||||
}
|
||||
break;
|
||||
}
|
||||
return Loca(slice, num_glyphs, index_to_loc_format);
|
||||
}
|
||||
|
||||
u32 Loca::get_glyph_offset(u32 glyph_id) const
|
||||
{
|
||||
ASSERT(glyph_id < m_num_glyphs);
|
||||
switch (m_index_to_loc_format) {
|
||||
case IndexToLocFormat::Offset16:
|
||||
return ((u32)be_u16(m_slice.offset_pointer(glyph_id * 2))) * 2;
|
||||
case IndexToLocFormat::Offset32:
|
||||
return be_u32(m_slice.offset_pointer(glyph_id * 4));
|
||||
default:
|
||||
ASSERT_NOT_REACHED();
|
||||
}
|
||||
}
|
||||
|
||||
static void get_ttglyph_offsets(const ReadonlyBytes& slice, u32 num_points, u32 flags_offset, u32* x_offset, u32* y_offset)
|
||||
{
|
||||
u32 flags_size = 0;
|
||||
u32 x_size = 0;
|
||||
u32 repeat_count;
|
||||
while (num_points > 0) {
|
||||
u8 flag = slice[flags_offset + flags_size];
|
||||
if (flag & (u8)SimpleGlyfFlags::RepeatFlag) {
|
||||
flags_size++;
|
||||
repeat_count = slice[flags_offset + flags_size] + 1;
|
||||
} else {
|
||||
repeat_count = 1;
|
||||
}
|
||||
flags_size++;
|
||||
switch (flag & (u8)SimpleGlyfFlags::XMask) {
|
||||
case (u8)SimpleGlyfFlags::XLongVector:
|
||||
x_size += repeat_count * 2;
|
||||
break;
|
||||
case (u8)SimpleGlyfFlags::XNegativeShortVector:
|
||||
case (u8)SimpleGlyfFlags::XPositiveShortVector:
|
||||
x_size += repeat_count;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
num_points -= repeat_count;
|
||||
}
|
||||
*x_offset = flags_offset + flags_size;
|
||||
*y_offset = *x_offset + x_size;
|
||||
}
|
||||
|
||||
void Glyf::Glyph::raster_inner(Rasterizer& rasterizer, Gfx::AffineTransform& affine) const
|
||||
{
|
||||
// Get offset for flags, x, and y.
|
||||
u16 num_points = be_u16(m_slice.offset_pointer((m_num_contours - 1) * 2)) + 1;
|
||||
u16 num_instructions = be_u16(m_slice.offset_pointer(m_num_contours * 2));
|
||||
u32 flags_offset = m_num_contours * 2 + 2 + num_instructions;
|
||||
u32 x_offset = 0;
|
||||
u32 y_offset = 0;
|
||||
get_ttglyph_offsets(m_slice, num_points, flags_offset, &x_offset, &y_offset);
|
||||
|
||||
// Prepare to render glyph.
|
||||
Gfx::Path path;
|
||||
PointIterator point_iterator(m_slice, num_points, flags_offset, x_offset, y_offset, affine);
|
||||
|
||||
int last_contour_end = -1;
|
||||
i32 contour_index = 0;
|
||||
u32 contour_size = 0;
|
||||
Optional<Gfx::FloatPoint> contour_start = {};
|
||||
Optional<Gfx::FloatPoint> last_offcurve_point = {};
|
||||
|
||||
// Render glyph
|
||||
while (true) {
|
||||
if (!contour_start.has_value()) {
|
||||
if (contour_index >= m_num_contours) {
|
||||
break;
|
||||
}
|
||||
int current_contour_end = be_u16(m_slice.offset_pointer(contour_index++ * 2));
|
||||
contour_size = current_contour_end - last_contour_end;
|
||||
last_contour_end = current_contour_end;
|
||||
auto opt_item = point_iterator.next();
|
||||
ASSERT(opt_item.has_value());
|
||||
contour_start = opt_item.value().point;
|
||||
path.move_to(contour_start.value());
|
||||
contour_size--;
|
||||
} else if (!last_offcurve_point.has_value()) {
|
||||
if (contour_size > 0) {
|
||||
auto opt_item = point_iterator.next();
|
||||
// FIXME: Should we draw a line to the first point here?
|
||||
if (!opt_item.has_value()) {
|
||||
break;
|
||||
}
|
||||
auto item = opt_item.value();
|
||||
contour_size--;
|
||||
if (item.on_curve) {
|
||||
path.line_to(item.point);
|
||||
} else if (contour_size > 0) {
|
||||
auto opt_next_item = point_iterator.next();
|
||||
// FIXME: Should we draw a quadratic bezier to the first point here?
|
||||
if (!opt_next_item.has_value()) {
|
||||
break;
|
||||
}
|
||||
auto next_item = opt_next_item.value();
|
||||
contour_size--;
|
||||
if (next_item.on_curve) {
|
||||
path.quadratic_bezier_curve_to(item.point, next_item.point);
|
||||
} else {
|
||||
auto mid_point = (item.point + next_item.point) * 0.5f;
|
||||
path.quadratic_bezier_curve_to(item.point, mid_point);
|
||||
last_offcurve_point = next_item.point;
|
||||
}
|
||||
} else {
|
||||
path.quadratic_bezier_curve_to(item.point, contour_start.value());
|
||||
contour_start = {};
|
||||
}
|
||||
} else {
|
||||
path.line_to(contour_start.value());
|
||||
contour_start = {};
|
||||
}
|
||||
} else {
|
||||
auto point0 = last_offcurve_point.value();
|
||||
last_offcurve_point = {};
|
||||
if (contour_size > 0) {
|
||||
auto opt_item = point_iterator.next();
|
||||
// FIXME: Should we draw a quadratic bezier to the first point here?
|
||||
if (!opt_item.has_value()) {
|
||||
break;
|
||||
}
|
||||
auto item = opt_item.value();
|
||||
contour_size--;
|
||||
if (item.on_curve) {
|
||||
path.quadratic_bezier_curve_to(point0, item.point);
|
||||
} else {
|
||||
auto mid_point = (point0 + item.point) * 0.5f;
|
||||
path.quadratic_bezier_curve_to(point0, mid_point);
|
||||
last_offcurve_point = item.point;
|
||||
}
|
||||
} else {
|
||||
path.quadratic_bezier_curve_to(point0, contour_start.value());
|
||||
contour_start = {};
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
rasterizer.draw_path(path);
|
||||
}
|
||||
|
||||
RefPtr<Gfx::Bitmap> Glyf::Glyph::raster_simple(float x_scale, float y_scale) const
|
||||
{
|
||||
u32 width = (u32)(ceil((m_xmax - m_xmin) * x_scale)) + 2;
|
||||
u32 height = (u32)(ceil((m_ymax - m_ymin) * y_scale)) + 2;
|
||||
Rasterizer rasterizer(Gfx::IntSize(width, height));
|
||||
auto affine = Gfx::AffineTransform().scale(x_scale, -y_scale).translate(-m_xmin, -m_ymax);
|
||||
raster_inner(rasterizer, affine);
|
||||
return rasterizer.accumulate();
|
||||
}
|
||||
|
||||
Glyf::Glyph Glyf::glyph(u32 offset) const
|
||||
{
|
||||
ASSERT(m_slice.size() >= offset + (u32)Sizes::GlyphHeader);
|
||||
i16 num_contours = be_i16(m_slice.offset_pointer(offset));
|
||||
i16 xmin = be_i16(m_slice.offset_pointer(offset + (u32)Offsets::XMin));
|
||||
i16 ymin = be_i16(m_slice.offset_pointer(offset + (u32)Offsets::YMin));
|
||||
i16 xmax = be_i16(m_slice.offset_pointer(offset + (u32)Offsets::XMax));
|
||||
i16 ymax = be_i16(m_slice.offset_pointer(offset + (u32)Offsets::YMax));
|
||||
auto slice = ReadonlyBytes(m_slice.offset_pointer(offset + (u32)Sizes::GlyphHeader), m_slice.size() - offset - (u32)Sizes::GlyphHeader);
|
||||
return Glyph(slice, xmin, ymin, xmax, ymax, num_contours);
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue