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#include <mbgl/renderer/buckets/symbol_bucket.hpp>
#include <mbgl/renderer/layers/render_symbol_layer.hpp>
#include <mbgl/renderer/bucket_parameters.hpp>
#include <mbgl/style/layers/symbol_layer_impl.hpp>
#include <mbgl/text/glyph_atlas.hpp>
namespace mbgl {
using namespace style;
SymbolBucket::SymbolBucket(style::SymbolLayoutProperties::PossiblyEvaluated layout_,
const std::map<std::string, std::pair<
style::IconPaintProperties::PossiblyEvaluated,
style::TextPaintProperties::PossiblyEvaluated>>& layerPaintProperties,
const style::DataDrivenPropertyValue<float>& textSize,
const style::DataDrivenPropertyValue<float>& iconSize,
float zoom,
bool sdfIcons_,
bool iconsNeedLinear_,
bool sortFeaturesByY_,
const std::vector<SymbolInstance>&& symbolInstances_)
: layout(std::move(layout_)),
sdfIcons(sdfIcons_),
iconsNeedLinear(iconsNeedLinear_ || iconSize.isDataDriven() || !iconSize.isZoomConstant()),
sortFeaturesByY(sortFeaturesByY_),
symbolInstances(std::move(symbolInstances_)),
textSizeBinder(SymbolSizeBinder::create(zoom, textSize, TextSize::defaultValue())),
iconSizeBinder(SymbolSizeBinder::create(zoom, iconSize, IconSize::defaultValue())) {
for (const auto& pair : layerPaintProperties) {
paintPropertyBinders.emplace(
std::piecewise_construct,
std::forward_as_tuple(pair.first),
std::forward_as_tuple(
std::piecewise_construct,
std::forward_as_tuple(pair.second.first, zoom),
std::forward_as_tuple(pair.second.second, zoom)));
}
}
void SymbolBucket::upload(gl::Context& context) {
if (hasTextData()) {
if (!staticUploaded) {
text.indexBuffer = context.createIndexBuffer(std::move(text.triangles), sortFeaturesByY ? gl::BufferUsage::StreamDraw : gl::BufferUsage::StaticDraw);
text.vertexBuffer = context.createVertexBuffer(std::move(text.vertices));
} else if (!sortUploaded) {
context.updateIndexBuffer(*text.indexBuffer, std::move(text.triangles));
}
if (!dynamicUploaded) {
text.dynamicVertexBuffer = context.createVertexBuffer(std::move(text.dynamicVertices), gl::BufferUsage::StreamDraw);
}
if (!placementChangesUploaded) {
if (!text.opacityVertexBuffer) {
text.opacityVertexBuffer = context.createVertexBuffer(std::move(text.opacityVertices), gl::BufferUsage::StreamDraw);
} else {
context.updateVertexBuffer(*text.opacityVertexBuffer, std::move(text.opacityVertices));
}
}
}
if (hasIconData()) {
if (!staticUploaded) {
icon.indexBuffer = context.createIndexBuffer(std::move(icon.triangles), sortFeaturesByY ? gl::BufferUsage::StreamDraw : gl::BufferUsage::StaticDraw);
icon.vertexBuffer = context.createVertexBuffer(std::move(icon.vertices));
} else if (!sortUploaded) {
context.updateIndexBuffer(*icon.indexBuffer, std::move(icon.triangles));
}
if (!dynamicUploaded) {
icon.dynamicVertexBuffer = context.createVertexBuffer(std::move(icon.dynamicVertices), gl::BufferUsage::StreamDraw);
}
if (!placementChangesUploaded) {
if (!icon.opacityVertexBuffer) {
icon.opacityVertexBuffer = context.createVertexBuffer(std::move(icon.opacityVertices), gl::BufferUsage::StreamDraw);
} else {
context.updateVertexBuffer(*icon.opacityVertexBuffer, std::move(icon.opacityVertices));
}
}
}
if (hasCollisionBoxData()) {
if (!staticUploaded) {
collisionBox.indexBuffer = context.createIndexBuffer(std::move(collisionBox.lines));
collisionBox.vertexBuffer = context.createVertexBuffer(std::move(collisionBox.vertices));
}
if (!placementChangesUploaded) {
if (!collisionBox.dynamicVertexBuffer) {
collisionBox.dynamicVertexBuffer = context.createVertexBuffer(std::move(collisionBox.dynamicVertices), gl::BufferUsage::StreamDraw);
} else {
context.updateVertexBuffer(*collisionBox.dynamicVertexBuffer, std::move(collisionBox.dynamicVertices));
}
}
}
if (hasCollisionCircleData()) {
if (!staticUploaded) {
collisionCircle.indexBuffer = context.createIndexBuffer(std::move(collisionCircle.triangles));
collisionCircle.vertexBuffer = context.createVertexBuffer(std::move(collisionCircle.vertices));
}
if (!placementChangesUploaded) {
if (!collisionCircle.dynamicVertexBuffer) {
collisionCircle.dynamicVertexBuffer = context.createVertexBuffer(std::move(collisionCircle.dynamicVertices), gl::BufferUsage::StreamDraw);
} else {
context.updateVertexBuffer(*collisionCircle.dynamicVertexBuffer, std::move(collisionCircle.dynamicVertices));
}
}
}
if (!staticUploaded) {
for (auto& pair : paintPropertyBinders) {
pair.second.first.upload(context);
pair.second.second.upload(context);
}
}
uploaded = true;
staticUploaded = true;
placementChangesUploaded = true;
dynamicUploaded = true;
sortUploaded = true;
}
bool SymbolBucket::hasData() const {
return hasTextData() || hasIconData() || hasCollisionBoxData();
}
bool SymbolBucket::hasTextData() const {
return !text.segments.empty();
}
bool SymbolBucket::hasIconData() const {
return !icon.segments.empty();
}
bool SymbolBucket::hasCollisionBoxData() const {
return !collisionBox.segments.empty();
}
bool SymbolBucket::hasCollisionCircleData() const {
return !collisionCircle.segments.empty();
}
void SymbolBucket::updateOpacity() {
placementChangesUploaded = false;
uploaded = false;
}
void addPlacedSymbol(gl::IndexVector<gl::Triangles>& triangles, const PlacedSymbol& placedSymbol) {
auto endIndex = placedSymbol.vertexStartIndex + placedSymbol.glyphOffsets.size() * 4;
for (auto vertexIndex = placedSymbol.vertexStartIndex; vertexIndex < endIndex; vertexIndex += 4) {
triangles.emplace_back(vertexIndex + 0, vertexIndex + 1, vertexIndex + 2);
triangles.emplace_back(vertexIndex + 1, vertexIndex + 2, vertexIndex + 3);
}
}
void SymbolBucket::sortFeatures(const float angle) {
if (!sortFeaturesByY) {
return;
}
if (sortedAngle && *sortedAngle == angle) {
return;
}
sortedAngle = angle;
// The current approach to sorting doesn't sort across segments so don't try.
// Sorting within segments separately seemed not to be worth the complexity.
if (text.segments.size() > 1 || icon.segments.size() > 1) {
return;
}
sortUploaded = false;
uploaded = false;
// If the symbols are allowed to overlap sort them by their vertical screen position.
// The index array buffer is rewritten to reference the (unchanged) vertices in the
// sorted order.
// To avoid sorting the actual symbolInstance array we sort an array of indexes.
std::vector<size_t> symbolInstanceIndexes;
symbolInstanceIndexes.reserve(symbolInstances.size());
for (size_t i = 0; i < symbolInstances.size(); i++) {
symbolInstanceIndexes.push_back(i);
}
const float sin = std::sin(angle);
const float cos = std::cos(angle);
std::sort(symbolInstanceIndexes.begin(), symbolInstanceIndexes.end(), [sin, cos, this](size_t &aIndex, size_t &bIndex) {
const SymbolInstance& a = symbolInstances[aIndex];
const SymbolInstance& b = symbolInstances[bIndex];
const int32_t aRotated = sin * a.anchor.point.x + cos * a.anchor.point.y;
const int32_t bRotated = sin * b.anchor.point.x + cos * b.anchor.point.y;
return aRotated != bRotated ?
aRotated < bRotated :
a.index > b.index;
});
text.triangles.clear();
icon.triangles.clear();
for (auto i : symbolInstanceIndexes) {
const SymbolInstance& symbolInstance = symbolInstances[i];
if (symbolInstance.placedTextIndex) {
addPlacedSymbol(text.triangles, text.placedSymbols[*symbolInstance.placedTextIndex]);
}
if (symbolInstance.placedVerticalTextIndex) {
addPlacedSymbol(text.triangles, text.placedSymbols[*symbolInstance.placedVerticalTextIndex]);
}
if (symbolInstance.placedIconIndex) {
addPlacedSymbol(icon.triangles, icon.placedSymbols[*symbolInstance.placedIconIndex]);
}
}
}
} // namespace mbgl
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