diff options
Diffstat (limited to 'src/mbgl/renderer/layers/render_symbol_layer.cpp')
| -rw-r--r-- | src/mbgl/renderer/layers/render_symbol_layer.cpp | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/src/mbgl/renderer/layers/render_symbol_layer.cpp b/src/mbgl/renderer/layers/render_symbol_layer.cpp new file mode 100644 index 0000000000..1376e8a3d8 --- /dev/null +++ b/src/mbgl/renderer/layers/render_symbol_layer.cpp @@ -0,0 +1,325 @@ +#include <mbgl/renderer/layers/render_symbol_layer.hpp> +#include <mbgl/renderer/buckets/symbol_bucket.hpp> +#include <mbgl/renderer/bucket_parameters.hpp> +#include <mbgl/renderer/property_evaluation_parameters.hpp> +#include <mbgl/renderer/render_tile.hpp> +#include <mbgl/renderer/paint_parameters.hpp> +#include <mbgl/renderer/frame_history.hpp> +#include <mbgl/text/glyph_atlas.hpp> +#include <mbgl/programs/programs.hpp> +#include <mbgl/programs/symbol_program.hpp> +#include <mbgl/programs/collision_box_program.hpp> +#include <mbgl/tile/tile.hpp> +#include <mbgl/tile/geometry_tile.hpp> +#include <mbgl/tile/geometry_tile_data.hpp> +#include <mbgl/style/layers/symbol_layer_impl.hpp> +#include <mbgl/layout/symbol_layout.hpp> +#include <mbgl/layout/symbol_projection.hpp> +#include <mbgl/util/math.hpp> + +#include <cmath> + +namespace mbgl { + +using namespace style; + +RenderSymbolLayer::RenderSymbolLayer(Immutable<style::SymbolLayer::Impl> _impl) + : RenderLayer(style::LayerType::Symbol, _impl), + unevaluated(impl().paint.untransitioned()) { +} + +const style::SymbolLayer::Impl& RenderSymbolLayer::impl() const { + return static_cast<const style::SymbolLayer::Impl&>(*baseImpl); +} + +std::unique_ptr<Bucket> RenderSymbolLayer::createBucket(const BucketParameters&, const std::vector<const RenderLayer*>&) const { + assert(false); // Should be calling createLayout() instead. + return nullptr; +} + +std::unique_ptr<SymbolLayout> RenderSymbolLayer::createLayout(const BucketParameters& parameters, + const std::vector<const RenderLayer*>& group, + std::unique_ptr<GeometryTileLayer> layer, + GlyphDependencies& glyphDependencies, + ImageDependencies& imageDependencies) const { + return std::make_unique<SymbolLayout>(parameters, + group, + std::move(layer), + imageDependencies, + glyphDependencies); +} + +void RenderSymbolLayer::transition(const TransitionParameters& parameters) { + unevaluated = impl().paint.transitioned(parameters, std::move(unevaluated)); +} + +void RenderSymbolLayer::evaluate(const PropertyEvaluationParameters& parameters) { + evaluated = unevaluated.evaluate(parameters); + + auto hasIconOpacity = evaluated.get<style::IconColor>().constantOr(Color::black()).a > 0 || + evaluated.get<style::IconHaloColor>().constantOr(Color::black()).a > 0; + auto hasTextOpacity = evaluated.get<style::TextColor>().constantOr(Color::black()).a > 0 || + evaluated.get<style::TextHaloColor>().constantOr(Color::black()).a > 0; + + passes = ((evaluated.get<style::IconOpacity>().constantOr(1) > 0 && hasIconOpacity && iconSize > 0) + || (evaluated.get<style::TextOpacity>().constantOr(1) > 0 && hasTextOpacity && textSize > 0)) + ? RenderPass::Translucent : RenderPass::None; +} + +bool RenderSymbolLayer::hasTransition() const { + return unevaluated.hasTransition(); +} + +void RenderSymbolLayer::render(PaintParameters& parameters, RenderSource*) { + if (parameters.pass == RenderPass::Opaque) { + return; + } + + for (const RenderTile& tile : renderTiles) { + assert(dynamic_cast<SymbolBucket*>(tile.tile.getBucket(*baseImpl))); + SymbolBucket& bucket = *reinterpret_cast<SymbolBucket*>(tile.tile.getBucket(*baseImpl)); + + const auto& layout = bucket.layout; + + parameters.frameHistory.bind(parameters.context, 1); + + auto draw = [&] (auto& program, + auto&& uniformValues, + const auto& buffers, + const auto& symbolSizeBinder, + const SymbolPropertyValues& values_, + const auto& binders, + const auto& paintProperties) + { + // We clip symbols to their tile extent in still mode. + const bool needsClipping = parameters.mapMode == MapMode::Still; + + program.get(paintProperties).draw( + parameters.context, + gl::Triangles(), + values_.pitchAlignment == AlignmentType::Map + ? parameters.depthModeForSublayer(0, gl::DepthMode::ReadOnly) + : gl::DepthMode::disabled(), + needsClipping + ? parameters.stencilModeForClipping(tile.clip) + : gl::StencilMode::disabled(), + parameters.colorModeForRenderPass(), + std::move(uniformValues), + *buffers.vertexBuffer, + *buffers.dynamicVertexBuffer, + *symbolSizeBinder, + *buffers.indexBuffer, + buffers.segments, + binders, + paintProperties, + parameters.state.getZoom(), + getID() + ); + }; + + assert(dynamic_cast<GeometryTile*>(&tile.tile)); + GeometryTile& geometryTile = static_cast<GeometryTile&>(tile.tile); + + if (bucket.hasIconData()) { + auto values = iconPropertyValues(layout); + auto paintPropertyValues = iconPaintProperties(); + + const bool alongLine = layout.get<SymbolPlacement>() == SymbolPlacementType::Line && + layout.get<IconRotationAlignment>() == AlignmentType::Map; + + if (alongLine) { + reprojectLineLabels(bucket.icon.dynamicVertices, + bucket.icon.placedSymbols, + tile.matrix, + values, + tile, + *bucket.iconSizeBinder, + parameters.state, + parameters.frameHistory); + + parameters.context.updateVertexBuffer(*bucket.icon.dynamicVertexBuffer, std::move(bucket.icon.dynamicVertices)); + } + + const bool iconScaled = layout.get<IconSize>().constantOr(1.0) != 1.0 || bucket.iconsNeedLinear; + const bool iconTransformed = values.rotationAlignment == AlignmentType::Map || parameters.state.getPitch() != 0; + + parameters.context.bindTexture(*geometryTile.iconAtlasTexture, 0, + bucket.sdfIcons || parameters.state.isChanging() || iconScaled || iconTransformed + ? gl::TextureFilter::Linear : gl::TextureFilter::Nearest); + + const Size texsize = geometryTile.iconAtlasTexture->size; + + if (bucket.sdfIcons) { + if (values.hasHalo) { + draw(parameters.programs.symbolIconSDF, + SymbolSDFIconProgram::uniformValues(false, values, texsize, parameters.pixelsToGLUnits, alongLine, tile, parameters.state, SymbolSDFPart::Halo), + bucket.icon, + bucket.iconSizeBinder, + values, + bucket.paintPropertyBinders.at(getID()).first, + paintPropertyValues); + } + + if (values.hasFill) { + draw(parameters.programs.symbolIconSDF, + SymbolSDFIconProgram::uniformValues(false, values, texsize, parameters.pixelsToGLUnits, alongLine, tile, parameters.state, SymbolSDFPart::Fill), + bucket.icon, + bucket.iconSizeBinder, + values, + bucket.paintPropertyBinders.at(getID()).first, + paintPropertyValues); + } + } else { + draw(parameters.programs.symbolIcon, + SymbolIconProgram::uniformValues(false, values, texsize, parameters.pixelsToGLUnits, alongLine, tile, parameters.state), + bucket.icon, + bucket.iconSizeBinder, + values, + bucket.paintPropertyBinders.at(getID()).first, + paintPropertyValues); + } + } + + if (bucket.hasTextData()) { + parameters.context.bindTexture(*geometryTile.glyphAtlasTexture, 0, gl::TextureFilter::Linear); + + auto values = textPropertyValues(layout); + auto paintPropertyValues = textPaintProperties(); + + const bool alongLine = layout.get<SymbolPlacement>() == SymbolPlacementType::Line && + layout.get<TextRotationAlignment>() == AlignmentType::Map; + + if (alongLine) { + reprojectLineLabels(bucket.text.dynamicVertices, + bucket.text.placedSymbols, + tile.matrix, + values, + tile, + *bucket.textSizeBinder, + parameters.state, + parameters.frameHistory); + + parameters.context.updateVertexBuffer(*bucket.text.dynamicVertexBuffer, std::move(bucket.text.dynamicVertices)); + } + + const Size texsize = geometryTile.glyphAtlasTexture->size; + + if (values.hasHalo) { + draw(parameters.programs.symbolGlyph, + SymbolSDFTextProgram::uniformValues(true, values, texsize, parameters.pixelsToGLUnits, alongLine, tile, parameters.state, SymbolSDFPart::Halo), + bucket.text, + bucket.textSizeBinder, + values, + bucket.paintPropertyBinders.at(getID()).second, + paintPropertyValues); + } + + if (values.hasFill) { + draw(parameters.programs.symbolGlyph, + SymbolSDFTextProgram::uniformValues(true, values, texsize, parameters.pixelsToGLUnits, alongLine, tile, parameters.state, SymbolSDFPart::Fill), + bucket.text, + bucket.textSizeBinder, + values, + bucket.paintPropertyBinders.at(getID()).second, + paintPropertyValues); + } + } + + if (bucket.hasCollisionBoxData()) { + static const style::Properties<>::PossiblyEvaluated properties {}; + static const CollisionBoxProgram::PaintPropertyBinders paintAttributeData(properties, 0); + + parameters.programs.collisionBox.draw( + parameters.context, + gl::Lines { 1.0f }, + gl::DepthMode::disabled(), + parameters.stencilModeForClipping(tile.clip), + parameters.colorModeForRenderPass(), + CollisionBoxProgram::UniformValues { + uniforms::u_matrix::Value{ tile.matrix }, + uniforms::u_scale::Value{ std::pow(2.0f, float(parameters.state.getZoom() - tile.tile.id.overscaledZ)) }, + uniforms::u_zoom::Value{ float(parameters.state.getZoom() * 10) }, + uniforms::u_maxzoom::Value{ float((tile.id.canonical.z + 1) * 10) }, + uniforms::u_collision_y_stretch::Value{ tile.tile.yStretch() }, + uniforms::u_camera_to_center_distance::Value{ parameters.state.getCameraToCenterDistance() }, + uniforms::u_pitch::Value{ parameters.state.getPitch() }, + uniforms::u_fadetexture::Value{ 1 } + }, + *bucket.collisionBox.vertexBuffer, + *bucket.collisionBox.indexBuffer, + bucket.collisionBox.segments, + paintAttributeData, + properties, + parameters.state.getZoom(), + getID() + ); + } + } +} + +style::IconPaintProperties::PossiblyEvaluated RenderSymbolLayer::iconPaintProperties() const { + return style::IconPaintProperties::PossiblyEvaluated { + evaluated.get<style::IconOpacity>(), + evaluated.get<style::IconColor>(), + evaluated.get<style::IconHaloColor>(), + evaluated.get<style::IconHaloWidth>(), + evaluated.get<style::IconHaloBlur>(), + evaluated.get<style::IconTranslate>(), + evaluated.get<style::IconTranslateAnchor>() + }; +} + +style::TextPaintProperties::PossiblyEvaluated RenderSymbolLayer::textPaintProperties() const { + return style::TextPaintProperties::PossiblyEvaluated { + evaluated.get<style::TextOpacity>(), + evaluated.get<style::TextColor>(), + evaluated.get<style::TextHaloColor>(), + evaluated.get<style::TextHaloWidth>(), + evaluated.get<style::TextHaloBlur>(), + evaluated.get<style::TextTranslate>(), + evaluated.get<style::TextTranslateAnchor>() + }; +} + + +style::SymbolPropertyValues RenderSymbolLayer::iconPropertyValues(const style::SymbolLayoutProperties::PossiblyEvaluated& layout_) const { + return style::SymbolPropertyValues { + layout_.get<style::IconPitchAlignment>(), + layout_.get<style::IconRotationAlignment>(), + layout_.get<style::IconKeepUpright>(), + evaluated.get<style::IconTranslate>(), + evaluated.get<style::IconTranslateAnchor>(), + evaluated.get<style::IconHaloColor>().constantOr(Color::black()).a > 0 && + evaluated.get<style::IconHaloWidth>().constantOr(1), + evaluated.get<style::IconColor>().constantOr(Color::black()).a > 0, + 10.0f + }; +} + +style::SymbolPropertyValues RenderSymbolLayer::textPropertyValues(const style::SymbolLayoutProperties::PossiblyEvaluated& layout_) const { + // We hide line labels with viewport alignment as they move into the distance + // because the approximations we use for drawing their glyphs get progressively worse + // The "1.5" here means we start hiding them when the distance from the label + // to the camera is 50% greater than the distance from the center of the map + // to the camera. Depending on viewport properties, you might expect this to filter + // the top third of the screen at pitch 60, and do almost nothing at pitch 45 + // "10" is effectively infinite at any pitch we support + const bool limitMaxDistance = + layout_.get<style::SymbolPlacement>() == style::SymbolPlacementType::Line + && layout_.get<style::TextRotationAlignment>() == style::AlignmentType::Map + && layout_.get<style::TextPitchAlignment>() == style::AlignmentType::Viewport; + + return style::SymbolPropertyValues { + layout_.get<style::TextPitchAlignment>(), + layout_.get<style::TextRotationAlignment>(), + layout_.get<style::TextKeepUpright>(), + evaluated.get<style::TextTranslate>(), + evaluated.get<style::TextTranslateAnchor>(), + evaluated.get<style::TextHaloColor>().constantOr(Color::black()).a > 0 && + evaluated.get<style::TextHaloWidth>().constantOr(1), + evaluated.get<style::TextColor>().constantOr(Color::black()).a > 0, + limitMaxDistance ? 1.5f : 10.0f + }; +} + +} // namespace mbgl |