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Fix: FallbackParagraphLayouter wasn't reverse-mapping glyphs to character indexes right

This commit is contained in:
Niels Martin Hansen 2021-04-03 17:33:42 +02:00
parent 5db4473ae8
commit b52e526017
1 changed files with 11 additions and 10 deletions
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21
src/gfx_layout_fallback.cpp
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@ -46,7 +46,7 @@ public:
int glyph_count; ///< The number of glyphs.
public:
FallbackVisualRun(Font *font, const WChar *chars, int glyph_count, int x);
FallbackVisualRun(Font *font, const WChar *chars, int glyph_count, int char_offset, int x);
FallbackVisualRun(FallbackVisualRun &&other) noexcept;
~FallbackVisualRun() override;
const Font *GetFont() const override;
@ -104,12 +104,13 @@ public:
/**
* Create the visual run.
* @param font The font to use for this run.
* @param chars The characters to use for this run.
* @param char_count The number of characters in this run.
* @param x The initial x position for this run.
* @param font The font to use for this run.
* @param chars The characters to use for this run.
* @param char_count The number of characters in this run.
* @param char_offset This run's offset from the start of the layout input string.
* @param x The initial x position for this run.
*/
FallbackParagraphLayout::FallbackVisualRun::FallbackVisualRun(Font *font, const WChar *chars, int char_count, int x) :
FallbackParagraphLayout::FallbackVisualRun::FallbackVisualRun(Font *font, const WChar *chars, int char_count, int char_offset, int x) :
font(font), glyph_count(char_count)
{
const bool isbuiltin = font->fc->IsBuiltInFont();
@ -131,7 +132,7 @@ FallbackParagraphLayout::FallbackVisualRun::FallbackVisualRun(Font *font, const
this->positions[2 * i + 1] = 0; // No ascender adjustment.
}
this->positions[2 * i + 2] = this->positions[2 * i] + font->fc->GetGlyphWidth(this->glyphs[i]);
this->glyph_to_char[i] = i;
this->glyph_to_char[i] = char_offset + i;
}
}
@ -295,7 +296,7 @@ std::unique_ptr<const ParagraphLayouter::Line> FallbackParagraphLayout::NextLine
if (*this->buffer == '\0') {
/* Only a newline. */
this->buffer = nullptr;
l->emplace_back(this->runs.begin()->second, this->buffer, 0, 0);
l->emplace_back(this->runs.begin()->second, this->buffer, 0, 0, 0);
return l;
}
@ -324,7 +325,7 @@ std::unique_ptr<const ParagraphLayouter::Line> FallbackParagraphLayout::NextLine
if (this->buffer == next_run) {
int w = l->GetWidth();
l->emplace_back(iter->second, begin, this->buffer - begin, w);
l->emplace_back(iter->second, begin, this->buffer - begin, begin - this->buffer_begin, w);
++iter;
assert(iter != this->runs.end());
@ -369,7 +370,7 @@ std::unique_ptr<const ParagraphLayouter::Line> FallbackParagraphLayout::NextLine
if (l->size() == 0 || last_char - begin > 0) {
int w = l->GetWidth();
l->emplace_back(iter->second, begin, last_char - begin, w);
l->emplace_back(iter->second, begin, last_char - begin, begin - this->buffer_begin, w);
}
return l;
}