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#include <mbgl/style/layers/symbol_layer_impl.hpp>
#include <mbgl/style/bucket_parameters.hpp>
#include <mbgl/layout/symbol_layout.hpp>
#include <mbgl/renderer/bucket.hpp>
namespace mbgl {
namespace style {
void SymbolLayer::Impl::cascade(const CascadeParameters& parameters) {
paint.cascade(parameters);
}
bool SymbolLayer::Impl::evaluate(const PropertyEvaluationParameters& parameters) {
paint.evaluate(parameters);
// text-size and icon-size are layout properties but they also need to be evaluated as paint properties:
iconSize = layout.evaluate<IconSize>(parameters);
textSize = layout.evaluate<TextSize>(parameters);
passes = ((paint.evaluated.get<IconOpacity>() > 0 && (paint.evaluated.get<IconColor>().a > 0 || paint.evaluated.get<IconHaloColor>().a > 0) && iconSize > 0)
|| (paint.evaluated.get<TextOpacity>() > 0 && (paint.evaluated.get<TextColor>().a > 0 || paint.evaluated.get<TextHaloColor>().a > 0) && textSize > 0))
? RenderPass::Translucent : RenderPass::None;
return paint.hasTransition();
}
std::unique_ptr<Bucket> SymbolLayer::Impl::createBucket(BucketParameters&, const GeometryTileLayer&) const {
assert(false); // Should be calling createLayout() instead.
return nullptr;
}
std::unique_ptr<SymbolLayout> SymbolLayer::Impl::createLayout(BucketParameters& parameters,
const GeometryTileLayer& layer,
std::vector<std::unique_ptr<Layer>> group) const {
PropertyEvaluationParameters p(parameters.tileID.overscaledZ);
SymbolLayoutProperties::Evaluated evaluated = layout.evaluate(p);
if (evaluated.get<IconRotationAlignment>() == AlignmentType::Auto) {
if (evaluated.get<SymbolPlacement>() == SymbolPlacementType::Line) {
evaluated.get<IconRotationAlignment>() = AlignmentType::Map;
} else {
evaluated.get<IconRotationAlignment>() = AlignmentType::Viewport;
}
}
if (evaluated.get<TextRotationAlignment>() == AlignmentType::Auto) {
if (evaluated.get<SymbolPlacement>() == SymbolPlacementType::Line) {
evaluated.get<TextRotationAlignment>() = AlignmentType::Map;
} else {
evaluated.get<TextRotationAlignment>() = AlignmentType::Viewport;
}
}
// If unspecified `text-pitch-alignment` inherits `text-rotation-alignment`
if (evaluated.get<TextPitchAlignment>() == AlignmentType::Auto) {
evaluated.get<TextPitchAlignment>() = evaluated.get<TextRotationAlignment>();
}
float textMaxSize = layout.evaluate<TextSize>(PropertyEvaluationParameters(18));
evaluated.get<IconSize>() = layout.evaluate<IconSize>(PropertyEvaluationParameters(p.z + 1));
evaluated.get<TextSize>() = layout.evaluate<TextSize>(PropertyEvaluationParameters(p.z + 1));
return std::make_unique<SymbolLayout>(std::move(group),
layer.getName(),
parameters.tileID.overscaleFactor(),
parameters.tileID.overscaledZ,
parameters.mode,
layer,
filter,
evaluated,
textMaxSize,
*spriteAtlas);
}
SymbolPropertyValues SymbolLayer::Impl::iconPropertyValues(const SymbolLayoutProperties::Evaluated& layout_) const {
return SymbolPropertyValues {
layout_.get<IconRotationAlignment>(), // icon-pitch-alignment is not yet implemented; inherit the rotation alignment
layout_.get<IconRotationAlignment>(),
layout_.get<IconSize>(),
paint.evaluated.get<IconOpacity>(),
paint.evaluated.get<IconColor>(),
paint.evaluated.get<IconHaloColor>(),
paint.evaluated.get<IconHaloWidth>(),
paint.evaluated.get<IconHaloBlur>(),
paint.evaluated.get<IconTranslate>(),
paint.evaluated.get<IconTranslateAnchor>(),
iconSize,
1.0f
};
}
SymbolPropertyValues SymbolLayer::Impl::textPropertyValues(const SymbolLayoutProperties::Evaluated& layout_) const {
return SymbolPropertyValues {
layout_.get<TextPitchAlignment>(),
layout_.get<TextRotationAlignment>(),
layout_.get<TextSize>(),
paint.evaluated.get<TextOpacity>(),
paint.evaluated.get<TextColor>(),
paint.evaluated.get<TextHaloColor>(),
paint.evaluated.get<TextHaloWidth>(),
paint.evaluated.get<TextHaloBlur>(),
paint.evaluated.get<TextTranslate>(),
paint.evaluated.get<TextTranslateAnchor>(),
textSize,
24.0f
};
}
} // namespace style
} // namespace mbgl
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