Placement Class Reference

Public Member Functions
	Placement (const Config *conf, SkDocument *doc)
void	WriteLine (const SkShaper &shaper, const char *text, size_t textBytes)

Detailed Description

Definition at line 148 of file using_skia_and_harfbuzz.cpp.

Constructor & Destructor Documentation

Placement()

Placement::Placement ( const Config *  conf, SkDocument *  doc  )

inline

Definition at line 150 of file using_skia_and_harfbuzz.cpp.

        : config(conf), document(doc), pageCanvas(nullptr) {
        white_paint.setColor(SK_ColorWHITE);
        glyph_paint.setColor(SK_ColorBLACK);
        glyph_paint.setAntiAlias(true);
        font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
        font.setSubpixel(true);
        font.setSize(SkDoubleToScalar(config->font_size.value));
    }

Member Function Documentation

WriteLine()

void Placement::WriteLine ( const SkShaper &  shaper, const char *  text, size_t  textBytes  )

inline

Definition at line 160 of file using_skia_and_harfbuzz.cpp.

                                                                               {
        SkTextBlobBuilderRunHandler textBlobBuilder(text, {0, 0});
 
        const SkBidiIterator::Level defaultLevel = SkBidiIterator::kLTR;
        std::unique_ptr<SkShaper::BiDiRunIterator> bidi =
                SkShapers::unicode::BidiRunIterator(get_unicode(), text, textBytes, defaultLevel);
        SkASSERT(bidi);
 
        std::unique_ptr<SkShaper::LanguageRunIterator> language =
                SkShaper::MakeStdLanguageRunIterator(text, textBytes);
        SkASSERT(language);
 
        std::unique_ptr<SkShaper::ScriptRunIterator> script =
                SkShapers::HB::ScriptRunIterator(text, textBytes);
        SkASSERT(script);
 
        std::unique_ptr<SkShaper::FontRunIterator> fontRuns =
                SkShaper::MakeFontMgrRunIterator(text, textBytes, font, SkFontMgr::RefEmpty());
        SkASSERT(fontRuns);
 
        const SkScalar width = config->page_width.value - 2 * config->left_margin.value;
        shaper.shape(text,
                     textBytes,
                     *fontRuns,
                     *bidi,
                     *script,
                     *language,
                     nullptr,
                     0,
                     width,
                     &textBlobBuilder);
        SkPoint endPoint = textBlobBuilder.endPoint();
        sk_sp<const SkTextBlob> blob = textBlobBuilder.makeBlob();
        // If we don't have a page, or if we're not at the start of the page and the blob won't fit
        if (!pageCanvas ||
              (current_y > config->line_spacing_ratio.value * config->font_size.value &&
               current_y + endPoint.y() > config->page_height.value)
        ) {
            if (pageCanvas) {
                document->endPage();
            }
            pageCanvas = document->beginPage(
                    SkDoubleToScalar(config->page_width.value),
                    SkDoubleToScalar(config->page_height.value));
            pageCanvas->drawPaint(white_paint);
            current_x = config->left_margin.value;
            current_y = config->line_spacing_ratio.value * config->font_size.value;
        }
        pageCanvas->drawTextBlob(
                blob.get(), SkDoubleToScalar(current_x),
                SkDoubleToScalar(current_y), glyph_paint);
        // Advance to the next line.
        current_y += endPoint.y() + config->line_spacing_ratio.value * config->font_size.value;
    }

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The documentation for this class was generated from the following file:

• third_party/skia/tools/using_skia_and_harfbuzz.cpp