SymbolQuads getIconQuads(Anchor& anchor, const PositionedIcon& shapedIcon,
const GeometryCoordinates& line, const SymbolLayoutProperties& layout,
const bool alongLine) {
auto image = *(shapedIcon.image);
const float border = 1.0;
auto left = shapedIcon.left - border;
auto right = left + image.pos.w / image.relativePixelRatio;
auto top = shapedIcon.top - border;
auto bottom = top + image.pos.h / image.relativePixelRatio;
vec2<float> tl{left, top};
vec2<float> tr{right, top};
vec2<float> br{right, bottom};
vec2<float> bl{left, bottom};
float angle = layout.icon.rotate * util::DEG2RAD;
if (alongLine) {
assert(static_cast<unsigned int>(anchor.segment) < line.size());
const GeometryCoordinate &prev= line[anchor.segment];
if (anchor.y == prev.y && anchor.x == prev.x &&
static_cast<unsigned int>(anchor.segment + 1) < line.size()) {
const GeometryCoordinate &next= line[anchor.segment + 1];
angle += std::atan2(anchor.y - next.y, anchor.x - next.x) + M_PI;
} else {
angle += std::atan2(anchor.y - prev.y, anchor.x - prev.x);
}
}
if (angle) {
// Compute the transformation matrix.
float angle_sin = std::sin(angle);
float angle_cos = std::cos(angle);
std::array<float, 4> matrix = {{angle_cos, -angle_sin, angle_sin, angle_cos}};
tl = tl.matMul(matrix);
tr = tr.matMul(matrix);
bl = bl.matMul(matrix);
br = br.matMul(matrix);
}
SymbolQuads quads;
quads.emplace_back(tl, tr, bl, br, image.pos, 0, anchor, globalMinScale, std::numeric_limits<float>::infinity());
return quads;
}
SymbolQuads getIconQuads(Anchor &anchor, const PositionedIcon &shapedIcon,
const std::vector<Coordinate> &line, const StyleLayoutSymbol &layout,
const bool alongLine) {
const float border = 1.0;
auto left = shapedIcon.left - border;
auto right = left + shapedIcon.image.w;
auto top = shapedIcon.top - border;
auto bottom = top + shapedIcon.image.h;
vec2<float> tl{left, top};
vec2<float> tr{right, top};
vec2<float> br{right, bottom};
vec2<float> bl{left, bottom};
float angle = layout.icon.rotate * M_PI / 180.0f;
if (alongLine) {
assert(static_cast<unsigned int>(anchor.segment) < line.size());
const Coordinate &prev= line[anchor.segment];
angle += std::atan2(anchor.y - prev.y, anchor.x - prev.x);
}
if (angle) {
// Compute the transformation matrix.
float angle_sin = std::sin(angle);
float angle_cos = std::cos(angle);
std::array<float, 4> matrix = {{angle_cos, -angle_sin, angle_sin, angle_cos}};
tl = tl.matMul(matrix);
tr = tr.matMul(matrix);
bl = bl.matMul(matrix);
br = br.matMul(matrix);
}
SymbolQuads quads;
quads.emplace_back(tl, tr, bl, br, shapedIcon.image, 0, anchor, globalMinScale, std::numeric_limits<float>::infinity());
return quads;
}
SymbolQuads getGlyphQuads(Anchor& anchor, const Shaping& shapedText,
const float boxScale, const GeometryCoordinates& line, const SymbolLayoutProperties& layout,
const bool alongLine, const GlyphPositions& face) {
const float textRotate = layout.text.rotate * util::DEG2RAD;
const bool keepUpright = layout.text.keepUpright;
SymbolQuads quads;
for (const PositionedGlyph &positionedGlyph: shapedText.positionedGlyphs) {
auto face_it = face.find(positionedGlyph.glyph);
if (face_it == face.end())
continue;
const Glyph &glyph = face_it->second;
const Rect<uint16_t> &rect = glyph.rect;
if (!glyph)
continue;
if (!rect.hasArea())
continue;
const float centerX = (positionedGlyph.x + glyph.metrics.advance / 2.0f) * boxScale;
GlyphInstances glyphInstances;
if (alongLine) {
getSegmentGlyphs(std::back_inserter(glyphInstances), anchor, centerX, line, anchor.segment, true);
if (keepUpright)
getSegmentGlyphs(std::back_inserter(glyphInstances), anchor, centerX, line, anchor.segment, false);
} else {
glyphInstances.emplace_back(GlyphInstance{anchor});
}
// The rects have an addditional buffer that is not included in their size;
const float glyphPadding = 1.0f;
const float rectBuffer = 3.0f + glyphPadding;
const float x1 = positionedGlyph.x + glyph.metrics.left - rectBuffer;
const float y1 = positionedGlyph.y - glyph.metrics.top - rectBuffer;
const float x2 = x1 + rect.w;
const float y2 = y1 + rect.h;
const vec2<float> otl{x1, y1};
const vec2<float> otr{x2, y1};
const vec2<float> obl{x1, y2};
const vec2<float> obr{x2, y2};
for (const GlyphInstance &instance : glyphInstances) {
vec2<float> tl = otl;
vec2<float> tr = otr;
vec2<float> bl = obl;
vec2<float> br = obr;
const float angle = instance.angle + textRotate;
if (angle) {
// Compute the transformation matrix.
float angle_sin = std::sin(angle);
float angle_cos = std::cos(angle);
std::array<float, 4> matrix = {{angle_cos, -angle_sin, angle_sin, angle_cos}};
tl = tl.matMul(matrix);
tr = tr.matMul(matrix);
bl = bl.matMul(matrix);
br = br.matMul(matrix);
}
// Prevent label from extending past the end of the line
const float glyphMinScale = std::max(instance.minScale, anchor.scale);
const float glyphAngle = std::fmod((anchor.angle + textRotate + instance.offset + 2 * M_PI), (2 * M_PI));
quads.emplace_back(tl, tr, bl, br, rect, glyphAngle, instance.anchorPoint, glyphMinScale, instance.maxScale);
}
}
return quads;
}
SymbolQuads getGlyphQuads(Anchor& anchor,
const Shaping& shapedText,
const float boxScale,
const GeometryCoordinates& line,
const SymbolLayoutProperties::Evaluated& layout,
const style::SymbolPlacementType placement,
const GlyphPositionMap& positions) {
const float textRotate = layout.get<TextRotate>() * util::DEG2RAD;
const bool keepUpright = layout.get<TextKeepUpright>();
SymbolQuads quads;
for (const PositionedGlyph &positionedGlyph: shapedText.positionedGlyphs) {
auto positionsIt = positions.find(positionedGlyph.glyph);
if (positionsIt == positions.end())
continue;
const GlyphPosition& glyph = positionsIt->second;
const Rect<uint16_t>& rect = glyph.rect;
const float centerX = (positionedGlyph.x + glyph.metrics.advance / 2.0f) * boxScale;
GlyphInstances glyphInstances;
if (placement == style::SymbolPlacementType::Line) {
getLineGlyphs(std::back_inserter(glyphInstances), anchor, centerX, line, anchor.segment, false);
if (keepUpright)
getLineGlyphs(std::back_inserter(glyphInstances), anchor, centerX, line, anchor.segment, true);
} else {
glyphInstances.emplace_back(GlyphInstance{anchor.point});
}
// The rects have an addditional buffer that is not included in their size;
const float glyphPadding = 1.0f;
const float rectBuffer = 3.0f + glyphPadding;
const float x1 = positionedGlyph.x + glyph.metrics.left - rectBuffer;
const float y1 = positionedGlyph.y - glyph.metrics.top - rectBuffer;
const float x2 = x1 + rect.w;
const float y2 = y1 + rect.h;
const Point<float> center{positionedGlyph.x, static_cast<float>(static_cast<float>(glyph.metrics.advance) / 2.0)};
Point<float> otl{x1, y1};
Point<float> otr{x2, y1};
Point<float> obl{x1, y2};
Point<float> obr{x2, y2};
if (positionedGlyph.angle != 0) {
otl = util::rotate(otl - center, positionedGlyph.angle) + center;
otr = util::rotate(otr - center, positionedGlyph.angle) + center;
obl = util::rotate(obl - center, positionedGlyph.angle) + center;
obr = util::rotate(obr - center, positionedGlyph.angle) + center;
}
for (const GlyphInstance &instance : glyphInstances) {
Point<float> tl = otl;
Point<float> tr = otr;
Point<float> bl = obl;
Point<float> br = obr;
if (textRotate) {
// Compute the transformation matrix.
float angle_sin = std::sin(textRotate);
float angle_cos = std::cos(textRotate);
std::array<float, 4> matrix = {{angle_cos, -angle_sin, angle_sin, angle_cos}};
tl = util::matrixMultiply(matrix, tl);
tr = util::matrixMultiply(matrix, tr);
bl = util::matrixMultiply(matrix, bl);
br = util::matrixMultiply(matrix, br);
}
// Prevent label from extending past the end of the line
const float glyphMinScale = std::max(instance.minScale, anchor.scale);
// All the glyphs for a label are tagged with either the "right side up" or "upside down" anchor angle,
// which is used at placement time to determine which set to show
const float anchorAngle = std::fmod((anchor.angle + (instance.upsideDown ? M_PI : 0.0) + 2 * M_PI), (2 * M_PI));
const float glyphAngle = std::fmod((instance.angle + (instance.upsideDown ? M_PI : 0.0) + 2 * M_PI), (2 * M_PI));
quads.emplace_back(tl, tr, bl, br, rect, anchorAngle, glyphAngle, instance.anchorPoint, glyphMinScale, instance.maxScale, shapedText.writingMode);
}
}
return quads;
}