225 lines
11 KiB
C++
225 lines
11 KiB
C++
#include <mbgl/renderer/layers/render_circle_layer.hpp>
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#include <mbgl/renderer/buckets/circle_bucket.hpp>
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#include <mbgl/renderer/render_tile.hpp>
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#include <mbgl/renderer/paint_parameters.hpp>
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#include <mbgl/programs/programs.hpp>
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#include <mbgl/programs/circle_program.hpp>
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#include <mbgl/tile/tile.hpp>
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#include <mbgl/style/layers/circle_layer_impl.hpp>
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#include <mbgl/geometry/feature_index.hpp>
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#include <mbgl/gfx/cull_face_mode.hpp>
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#include <mbgl/gfx/shader_registry.hpp>
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#include <mbgl/util/math.hpp>
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#include <mbgl/util/intersection_tests.hpp>
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namespace mbgl {
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using namespace style;
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namespace {
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struct RenderableSegment {
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RenderableSegment(const Segment<CircleAttributes>& segment_,
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const RenderTile& tile_,
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const LayerRenderData* renderData_,
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float sortKey_)
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: segment(segment_), tile(tile_), renderData(renderData_), sortKey(sortKey_) {}
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const Segment<CircleAttributes>& segment;
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const RenderTile& tile;
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const LayerRenderData* renderData;
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const float sortKey;
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friend bool operator<(const RenderableSegment& lhs, const RenderableSegment& rhs) {
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if (lhs.sortKey == rhs.sortKey) return lhs.tile.id < rhs.tile.id;
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return lhs.sortKey < rhs.sortKey;
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}
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};
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inline const style::CircleLayer::Impl& impl_cast(const Immutable<style::Layer::Impl>& impl) {
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assert(impl->getTypeInfo() == CircleLayer::Impl::staticTypeInfo());
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return static_cast<const style::CircleLayer::Impl&>(*impl);
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}
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} // namespace
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RenderCircleLayer::RenderCircleLayer(Immutable<style::CircleLayer::Impl> _impl)
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: RenderLayer(makeMutable<CircleLayerProperties>(std::move(_impl))),
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unevaluated(impl_cast(baseImpl).paint.untransitioned()) {}
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void RenderCircleLayer::transition(const TransitionParameters& parameters) {
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unevaluated = impl_cast(baseImpl).paint.transitioned(parameters, std::move(unevaluated));
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}
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void RenderCircleLayer::evaluate(const PropertyEvaluationParameters& parameters) {
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auto properties = makeMutable<CircleLayerProperties>(
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staticImmutableCast<CircleLayer::Impl>(baseImpl),
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unevaluated.evaluate(parameters));
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const auto& evaluated = properties->evaluated;
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passes = ((evaluated.get<style::CircleRadius>().constantOr(1) > 0 ||
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evaluated.get<style::CircleStrokeWidth>().constantOr(1) > 0)
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&& (evaluated.get<style::CircleColor>().constantOr(Color::black()).a > 0 ||
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evaluated.get<style::CircleStrokeColor>().constantOr(Color::black()).a > 0)
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&& (evaluated.get<style::CircleOpacity>().constantOr(1) > 0 ||
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evaluated.get<style::CircleStrokeOpacity>().constantOr(1) > 0))
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? RenderPass::Translucent : RenderPass::None;
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properties->renderPasses = mbgl::underlying_type(passes);
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evaluatedProperties = std::move(properties);
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}
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bool RenderCircleLayer::hasTransition() const {
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return unevaluated.hasTransition();
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}
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bool RenderCircleLayer::hasCrossfade() const {
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return false;
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}
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void RenderCircleLayer::render(PaintParameters& parameters) {
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assert(renderTiles);
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if (parameters.pass == RenderPass::Opaque) {
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return;
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}
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if (!parameters.shaders.populate(circleProgram)) return;
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const auto drawTile = [&](const RenderTile& tile, const LayerRenderData* data, const auto& segments) {
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auto& circleBucket = static_cast<CircleBucket&>(*data->bucket);
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const auto& evaluated = getEvaluated<CircleLayerProperties>(data->layerProperties);
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const bool scaleWithMap = evaluated.template get<CirclePitchScale>() == CirclePitchScaleType::Map;
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const bool pitchWithMap = evaluated.template get<CirclePitchAlignment>() == AlignmentType::Map;
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const auto& paintPropertyBinders = circleBucket.paintPropertyBinders.at(getID());
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using LayoutUniformValues = CircleProgram::LayoutUniformValues;
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const auto& allUniformValues = CircleProgram::computeAllUniformValues(
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LayoutUniformValues(
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uniforms::matrix::Value(tile.translatedMatrix(evaluated.template get<CircleTranslate>(),
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evaluated.template get<CircleTranslateAnchor>(),
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parameters.state)),
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uniforms::scale_with_map::Value(scaleWithMap),
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uniforms::extrude_scale::Value(
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pitchWithMap ? std::array<float, 2>{{tile.id.pixelsToTileUnits(1.0f, static_cast<float>(parameters.state.getZoom())),
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tile.id.pixelsToTileUnits(1.0f, static_cast<float>(parameters.state.getZoom()))}}
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: parameters.pixelsToGLUnits),
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uniforms::device_pixel_ratio::Value(parameters.pixelRatio),
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uniforms::camera_to_center_distance::Value(parameters.state.getCameraToCenterDistance()),
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uniforms::pitch_with_map::Value(pitchWithMap)),
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paintPropertyBinders,
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evaluated,
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static_cast<float>(parameters.state.getZoom()));
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const auto& allAttributeBindings =
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CircleProgram::computeAllAttributeBindings(*circleBucket.vertexBuffer, paintPropertyBinders, evaluated);
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checkRenderability(parameters, CircleProgram::activeBindingCount(allAttributeBindings));
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circleProgram->draw(parameters.context,
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*parameters.renderPass,
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gfx::Triangles(),
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parameters.depthModeForSublayer(0, gfx::DepthMaskType::ReadOnly),
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gfx::StencilMode::disabled(),
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parameters.colorModeForRenderPass(),
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gfx::CullFaceMode::disabled(),
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*circleBucket.indexBuffer,
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segments,
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allUniformValues,
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allAttributeBindings,
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CircleProgram::TextureBindings{},
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getID());
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};
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const bool sortFeaturesByKey = !impl_cast(baseImpl).layout.get<CircleSortKey>().isUndefined();
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std::multiset<RenderableSegment> renderableSegments;
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for (const RenderTile& renderTile : *renderTiles) {
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const LayerRenderData* renderData = getRenderDataForPass(renderTile, parameters.pass);
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if (!renderData) {
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continue;
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}
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auto& bucket = static_cast<CircleBucket&>(*renderData->bucket);
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if (!sortFeaturesByKey) {
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drawTile(renderTile, renderData, bucket.segments);
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continue;
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}
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for (auto& segment : bucket.segments) {
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renderableSegments.emplace(segment, renderTile, renderData, segment.sortKey);
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}
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}
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if (sortFeaturesByKey) {
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for (const auto& renderable : renderableSegments) {
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drawTile(renderable.tile, renderable.renderData, renderable.segment);
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}
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}
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}
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GeometryCoordinate projectPoint(const GeometryCoordinate& p, const mat4& posMatrix, const Size& size) {
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vec4 pos = {{ static_cast<double>(p.x), static_cast<double>(p.y), 0, 1 }};
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matrix::transformMat4(pos, pos, posMatrix);
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return {
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static_cast<int16_t>((static_cast<float>(pos[0] / pos[3]) + 1) * size.width * 0.5),
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static_cast<int16_t>((static_cast<float>(pos[1] / pos[3]) + 1) * size.height * 0.5)
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};
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}
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GeometryCoordinates projectQueryGeometry(const GeometryCoordinates& queryGeometry, const mat4& posMatrix, const Size& size) {
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GeometryCoordinates projectedGeometry;
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for (auto& p : queryGeometry) {
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projectedGeometry.push_back(projectPoint(p, posMatrix, size));
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}
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return projectedGeometry;
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}
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bool RenderCircleLayer::queryIntersectsFeature(const GeometryCoordinates& queryGeometry,
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const GeometryTileFeature& feature, const float zoom,
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const TransformState& transformState, const float pixelsToTileUnits,
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const mat4& posMatrix, const FeatureState& featureState) const {
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const auto& evaluated = static_cast<const CircleLayerProperties&>(*evaluatedProperties).evaluated;
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// Translate query geometry
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const GeometryCoordinates& translatedQueryGeometry = FeatureIndex::translateQueryGeometry(
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queryGeometry,
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evaluated.get<style::CircleTranslate>(),
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evaluated.get<style::CircleTranslateAnchor>(),
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static_cast<float>(transformState.getBearing()),
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pixelsToTileUnits).value_or(queryGeometry);
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// Evaluate functions
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auto radius = evaluated.evaluate<style::CircleRadius>(zoom, feature, featureState);
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auto stroke = evaluated.evaluate<style::CircleStrokeWidth>(zoom, feature, featureState);
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auto size = radius + stroke;
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// For pitch-alignment: map, compare feature geometry to query geometry in the plane of the tile
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// Otherwise, compare geometry in the plane of the viewport
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// A circle with fixed scaling relative to the viewport gets larger in tile space as it moves into the distance
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// A circle with fixed scaling relative to the map gets smaller in viewport space as it moves into the distance
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bool alignWithMap = evaluated.evaluate<style::CirclePitchAlignment>(zoom, feature) == AlignmentType::Map;
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const GeometryCoordinates& transformedQueryGeometry = alignWithMap ?
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translatedQueryGeometry :
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projectQueryGeometry(translatedQueryGeometry, posMatrix, transformState.getSize());
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auto transformedSize = alignWithMap ? size * pixelsToTileUnits : size;
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const auto& geometry = feature.getGeometries();
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for (auto& ring : geometry) {
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for (auto& point : ring) {
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const GeometryCoordinate& transformedPoint = alignWithMap ? point : projectPoint(point, posMatrix, transformState.getSize());
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float adjustedSize = transformedSize;
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vec4 center = {{ static_cast<double>(point.x), static_cast<double>(point.y), 0, 1 }};
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matrix::transformMat4(center, center, posMatrix);
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auto pitchScale = evaluated.evaluate<style::CirclePitchScale>(zoom, feature);
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auto pitchAlignment = evaluated.evaluate<style::CirclePitchAlignment>(zoom, feature);
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if (pitchScale == CirclePitchScaleType::Viewport && pitchAlignment == AlignmentType::Map) {
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adjustedSize *= static_cast<float>(center[3] / transformState.getCameraToCenterDistance());
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} else if (pitchScale == CirclePitchScaleType::Map && pitchAlignment == AlignmentType::Viewport) {
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adjustedSize *= static_cast<float>(transformState.getCameraToCenterDistance() / center[3]);
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}
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if (util::polygonIntersectsBufferedPoint(transformedQueryGeometry, transformedPoint, adjustedSize)) return true;
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}
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}
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return false;
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}
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} // namespace mbgl
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