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LibPDF: Don't ignore word_spacing

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This commit is contained in:
Nico Weber 2023-07-22 10:38:52 -04:00 • committed by Tim Flynn
parent 05fbd31727
commit e3cc05b935
6 changed files with 15 additions and 6 deletions
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2
Userland/Libraries/LibPDF/Fonts/PDFFont.h
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@ -27,7 +27,7 @@ public:
virtual ~PDFFont() = default;
virtual void set_font_size(float font_size) = 0;
virtual PDFErrorOr<Gfx::FloatPoint> draw_string(Gfx::Painter&, Gfx::FloatPoint, DeprecatedString const&, Color const&, float font_size, float character_spacing, float horizontal_scaling) = 0;
virtual PDFErrorOr<Gfx::FloatPoint> draw_string(Gfx::Painter&, Gfx::FloatPoint, DeprecatedString const&, Color const&, float font_size, float character_spacing, float word_spacing, float horizontal_scaling) = 0;
virtual Type type() const = 0;
DeprecatedFlyString base_font_name() const { return m_base_font_name; }

11
Userland/Libraries/LibPDF/Fonts/SimpleFont.cpp
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@ -45,7 +45,7 @@ PDFErrorOr<void> SimpleFont::initialize(Document* document, NonnullRefPtr<DictOb
return {};
}
PDFErrorOr<Gfx::FloatPoint> SimpleFont::draw_string(Gfx::Painter& painter, Gfx::FloatPoint glyph_position, DeprecatedString const& string, Color const& paint_color, float font_size, float character_spacing, float horizontal_scaling)
PDFErrorOr<Gfx::FloatPoint> SimpleFont::draw_string(Gfx::Painter& painter, Gfx::FloatPoint glyph_position, DeprecatedString const& string, Color const& paint_color, float font_size, float character_spacing, float word_spacing, float horizontal_scaling)
{
for (auto char_code : string.bytes()) {
// Use the width specified in the font's dictionary if available,
@ -57,8 +57,17 @@ PDFErrorOr<Gfx::FloatPoint> SimpleFont::draw_string(Gfx::Painter& painter, Gfx::
glyph_width = get_glyph_width(char_code);
draw_glyph(painter, glyph_position, glyph_width, char_code, paint_color);
auto tx = glyph_width;
tx += character_spacing;
// ISO 32000 (PDF 2.0), 9.3.3 Wordspacing
// "Word spacing shall be applied to every occurrence of the single-byte character code 32
// in a string when using a simple font (including Type 3) or a composite font that defines
// code 32 as a single-byte code."
if (char_code == ' ')
tx += word_spacing;
tx *= horizontal_scaling;
glyph_position += { tx, 0.0f };
}

2
Userland/Libraries/LibPDF/Fonts/SimpleFont.h
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@ -13,7 +13,7 @@ namespace PDF {
class SimpleFont : public PDFFont {
public:
PDFErrorOr<Gfx::FloatPoint> draw_string(Gfx::Painter&, Gfx::FloatPoint, DeprecatedString const&, Color const&, float font_size, float character_spacing, float horizontal_scaling) override;
PDFErrorOr<Gfx::FloatPoint> draw_string(Gfx::Painter&, Gfx::FloatPoint, DeprecatedString const&, Color const&, float font_size, float character_spacing, float word_spacing, float horizontal_scaling) override;
protected:
PDFErrorOr<void> initialize(Document* document, NonnullRefPtr<DictObject> const& dict, float font_size) override;

2
Userland/Libraries/LibPDF/Fonts/Type0Font.cpp
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@ -91,7 +91,7 @@ void Type0Font::set_font_size(float)
{
}
PDFErrorOr<Gfx::FloatPoint> Type0Font::draw_string(Gfx::Painter&, Gfx::FloatPoint, DeprecatedString const&, Color const&, float, float, float)
PDFErrorOr<Gfx::FloatPoint> Type0Font::draw_string(Gfx::Painter&, Gfx::FloatPoint, DeprecatedString const&, Color const&, float, float, float, float)
{
return Error::rendering_unsupported_error("Type0 font not implemented yet");
}

2
Userland/Libraries/LibPDF/Fonts/Type0Font.h
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@ -20,7 +20,7 @@ struct CIDSystemInfo {
class Type0Font : public PDFFont {
public:
void set_font_size(float font_size) override;
PDFErrorOr<Gfx::FloatPoint> draw_string(Gfx::Painter&, Gfx::FloatPoint pos, DeprecatedString const&, Color const&, float, float, float) override;
PDFErrorOr<Gfx::FloatPoint> draw_string(Gfx::Painter&, Gfx::FloatPoint pos, DeprecatedString const&, Color const&, float, float, float, float) override;
Type type() const override { return PDFFont::Type::Type0; }
protected:

2
Userland/Libraries/LibPDF/Renderer.cpp
View file

@ -754,7 +754,7 @@ PDFErrorOr<void> Renderer::show_text(DeprecatedString const& string)
auto font_size = text_rendering_matrix.x_scale() * text_state().font_size;
auto start_position = text_rendering_matrix.map(Gfx::FloatPoint { 0.0f, 0.0f });
auto end_position = TRY(text_state().font->draw_string(m_painter, start_position, string, state().paint_color, font_size, text_state().character_spacing, text_state().horizontal_scaling));
auto end_position = TRY(text_state().font->draw_string(m_painter, start_position, string, state().paint_color, font_size, text_state().character_spacing, text_state().word_spacing, text_state().horizontal_scaling));
// Update text matrix
auto delta_x = end_position.x() - start_position.x();