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#include <mbgl/layout/symbol_instance.hpp>
#include <mbgl/style/layers/symbol_layer_properties.hpp>
namespace mbgl {
using namespace style;
namespace {
const Shaping& getAnyShaping(const ShapedTextOrientations& shapedTextOrientations) {
if (shapedTextOrientations.right) return shapedTextOrientations.right;
if (shapedTextOrientations.center) return shapedTextOrientations.center;
if (shapedTextOrientations.left) return shapedTextOrientations.left;
if (shapedTextOrientations.vertical) return shapedTextOrientations.vertical;
return shapedTextOrientations.horizontal;
}
} // namespace
SymbolInstance::SymbolInstance(Anchor& anchor_,
GeometryCoordinates line_,
const ShapedTextOrientations& shapedTextOrientations,
optional<PositionedIcon> shapedIcon,
const SymbolLayoutProperties::Evaluated& layout,
const float layoutTextSize,
const float textBoxScale_,
const float textPadding,
const SymbolPlacementType textPlacement,
const std::array<float, 2> textOffset_,
const float iconBoxScale,
const float iconPadding,
const std::array<float, 2> iconOffset_,
const GlyphPositions& positions,
const IndexedSubfeature& indexedFeature,
const std::size_t layoutFeatureIndex_,
const std::size_t dataFeatureIndex_,
const std::u16string& key_,
const float overscaling,
const float rotate,
float radialTextOffset_) :
anchor(anchor_),
line(line_),
hasText(false),
hasIcon(shapedIcon),
// Create the collision features that will be used to check whether this symbol instance can be placed
// As a collision approximation, we can use either the vertical or any of the horizontal versions of the feature
textCollisionFeature(line_, anchor, getAnyShaping(shapedTextOrientations), textBoxScale_, textPadding, textPlacement, indexedFeature, overscaling, rotate),
iconCollisionFeature(line_, anchor, shapedIcon, iconBoxScale, iconPadding, indexedFeature, rotate),
writingModes(WritingModeType::None),
layoutFeatureIndex(layoutFeatureIndex_),
dataFeatureIndex(dataFeatureIndex_),
textOffset(textOffset_),
iconOffset(iconOffset_),
key(key_),
textBoxScale(textBoxScale_),
radialTextOffset(radialTextOffset_),
singleLine(shapedTextOrientations.singleLine) {
// Create the quads used for rendering the icon and glyphs.
if (shapedIcon) {
iconQuad = getIconQuad(*shapedIcon, layout, layoutTextSize, shapedTextOrientations.horizontal);
}
bool singleLineInitialized = false;
const auto initHorizontalGlyphQuads = [&] (SymbolQuads& quads, const Shaping& shaping) {
writingModes |= WritingModeType::Horizontal;
if (!singleLine) {
quads = getGlyphQuads(shaping, textOffset, layout, textPlacement, positions);
return;
}
if (!singleLineInitialized) {
rightJustifiedGlyphQuads = getGlyphQuads(shaping, textOffset, layout, textPlacement, positions);
singleLineInitialized = true;
}
};
if (shapedTextOrientations.right) {
initHorizontalGlyphQuads(rightJustifiedGlyphQuads, shapedTextOrientations.right);
}
if (shapedTextOrientations.center) {
initHorizontalGlyphQuads(centerJustifiedGlyphQuads, shapedTextOrientations.center);
}
if (shapedTextOrientations.left) {
initHorizontalGlyphQuads(leftJustifiedGlyphQuads, shapedTextOrientations.left);
}
if (shapedTextOrientations.vertical) {
writingModes |= WritingModeType::Vertical;
verticalGlyphQuads = getGlyphQuads(shapedTextOrientations.vertical, textOffset, layout, textPlacement, positions);
}
// 'hasText' depends on finding at least one glyph in the shaping that's also in the GlyphPositionMap
hasText = !rightJustifiedGlyphQuads.empty() || !centerJustifiedGlyphQuads.empty() || !leftJustifiedGlyphQuads.empty() || !verticalGlyphQuads.empty();
}
optional<size_t> SymbolInstance::getDefaultHorizontalPlacedTextIndex() const {
if (placedRightTextIndex) return placedRightTextIndex;
if (placedCenterTextIndex) return placedCenterTextIndex;
if (placedLeftTextIndex) return placedLeftTextIndex;
return nullopt;
}
} // namespace mbgl
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