Method renderTiledImage

source/windowing/StarCanvasWidget.cpp:195–225

}

void CanvasWidget::renderTiledImage(Vec2F const& renderingOffset, String const& texName, float textureScale, Vec2D const& offset, RectF const& screenCoords, Vec4B const& color) {
  auto& context = GuiContext::singleton();

  Vec2F texSize = Vec2F(context.textureSize(texName));
  Vec2F texScaledSize = texSize * textureScale;
  Vec2I textureCount = Vec2I::ceil(screenCoords.size().piecewiseDivide(texScaledSize)) + Vec2I(2, 2);
  Vec2F screenLowerLeft = screenCoords.min() - Vec2F(pfmod<double>(texScaledSize[0] - offset[0], texScaledSize[0]), pfmod<double>(texScaledSize[1] - offset[1], texScaledSize[1]));

  for (int x = 0; x < textureCount[0]; ++x) {
    for (int y = 0; y < textureCount[1]; ++y) {
      Vec2F screenPos = screenLowerLeft + texScaledSize.piecewiseMultiply({(float)x, (float)y});
      RectF screenRect = RectF::withSize(screenPos, texScaledSize);

      RectF limitedScreenRect;
      limitedScreenRect.setXMin(max(screenRect.xMin(), screenCoords.xMin()));
      limitedScreenRect.setYMin(max(screenRect.yMin(), screenCoords.yMin()));
      limitedScreenRect.setXMax(min(screenRect.xMax(), screenCoords.xMax()));
      limitedScreenRect.setYMax(min(screenRect.yMax(), screenCoords.yMax()));

      RectF limitedTexRect = limitedScreenRect.translated(-screenPos).scaled(1 / textureScale);

      if (limitedScreenRect.isEmpty())
        continue;

      if (m_ignoreInterfaceScale)
        context.drawQuad(texName, limitedTexRect, limitedScreenRect.translated(renderingOffset), color);
      else
        context.drawQuad(texName, limitedTexRect, limitedScreenRect.translated(renderingOffset).scaled(context.interfaceScale()), color);
    }
  }
}

void CanvasWidget::renderLine(Vec2F const& renderingOffset, Vec2F const& begin, Vec2F const end, Vec4B const& color, float lineWidth) {
  auto& context = GuiContext::singleton();