Function draw_window

examples/complextextlayout.cpp:63–127

}

void draw_window(Window* window,
                 const FontMgrRef& fontMgr,
                 const FontRef& font,
                 const gfx::Point& mousePos)
{
  Surface* surface = window->surface();
  SurfaceLock lock(surface);
  const gfx::Rect rc = surface->bounds();

  Paint p;
  p.color(gfx::rgba(0, 0, 0));
  p.style(Paint::Fill);
  surface->drawRect(rc, p);

  p.color(gfx::rgba(255, 255, 255));

  // Create the text blobs just one time, and we cache them in textBlobs array
  if (textBlobs.empty()) {
    textBlobs.resize(N);
    for (size_t i = 0; i < N; ++i) {
      textBlobs[i] = TextBlob::MakeWithShaper(fontMgr, font, kLines[i]);
    }
  }

  gfx::RectF focusedGlyph;
  base::codepoint_t focusedCodepoint = 0;

  gfx::PointF pos(rc.w / 2, 0);
  for (size_t i = 0; i < N; ++i) {
    auto& blob = textBlobs[i];
    gfx::PointF textPos(pos.x - blob->bounds().w / 2, pos.y);

    draw_text(surface, blob, textPos, &p);

    // Check if the mouse is over one glyph of this text blob.
    if (!focusedCodepoint) {
      focusedCodepoint =
        inside_glyph_bounds(blob.get(), kLines[i], mousePos - textPos, focusedGlyph);
      if (focusedCodepoint)
        focusedGlyph.offset(textPos);
    }

    pos.y += font->lineHeight() + 4;
  }

  // Show Unicode code point of the hover char in the title bar.
  if (focusedCodepoint) {
    char buf[256];
    snprintf(buf, sizeof(buf), "%s - U+%04X", kTitle, focusedCodepoint);
    window->setTitle(buf);

    focusedGlyph.enlarge(1.0f);
    p.style(Paint::Style::Stroke);
    surface->drawRect(focusedGlyph, p);
  }
  else {
    window->setTitle(kTitle);
  }