Update the nuber of cores acording to the latest GitHub runners state

Qt 5.15 is now the minimal required Qt version.

.appveyor.yml

@@ -1,4 +1,4 @@
-version: 2.5.{build}
+version: 4.2.{build}
 
 configuration:
   - Release
@@ -7,26 +7,25 @@ image:
   - Visual Studio 2022
 
 environment:
-  VCPKGDIR: C:\tools\vcpkg\installed\x64-windows-static-md
+  VCPKGDIR: C:\tools\vcpkg\installed\x64-windows-static-md-release
   matrix:
   - QTDIR: C:\Qt\5.15\msvc2019_64
-  - QTDIR: C:\Qt\6.5\msvc2019_64
+  - QTDIR: C:\Qt\6.8\msvc2022_64
 
 install:
 - cmd: |-
-    set PATH=%QTDIR%\bin;%VCPKGDIR%\tools\protobuf;%PATH%
+    set PATH=%QTDIR%\bin;%PATH%
     call "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvars64.bat
-    vcpkg install protobuf:x64-windows-static-md
-    vcpkg install zlib:x64-windows-static-md
+    vcpkg install zlib:x64-windows-static-md-release
     copy /y %VCPKGDIR%\lib\zlib.lib %VCPKGDIR%\lib\zlibstatic.lib
 
 build_script:
 - cmd: |-
-    qmake PROTOBUF=%VCPKGDIR% ZLIB=%VCPKGDIR% pbfplugin.pro
+    qmake ZLIB=%VCPKGDIR% pbfplugin.pro
     nmake release
 
 artifacts:
-- path: release\pbf2.dll
+- path: release\pbf4.dll
 
 cache:
 - C:\tools\vcpkg\installed\

.github/workflows/android.yml

@@ -0,0 +1,48 @@
+name: Android
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: QtPBFImagePlugin
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: set up JDK 11
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '11'
+      - name: Setup Android SDK
+        uses: android-actions/setup-android@v3
+        with:
+          cmdline-tools-version: 9862592
+      - name: Install android platform, build-tools and ndk
+        run:  ${ANDROID_HOME}/cmdline-tools/latest/bin/sdkmanager --install "platforms;android-33" "build-tools;33.0.0" "ndk;23.1.7779620"
+      - name: Setup NDK path
+        run: echo "ANDROID_NDK_ROOT=${ANDROID_HOME}/ndk/23.1.7779620/" >> $GITHUB_ENV
+      - name: Install Qt (Desktop)
+        uses: jurplel/install-qt-action@v3
+        with:
+          aqtversion: '==3.1.*'
+          version: '6.4.0'
+      - name: Install Qt (Android)
+        uses: jurplel/install-qt-action@v3
+        with:
+          aqtversion: '==3.1.*'
+          version: '6.4.0'
+          target: 'android'
+          arch: 'android_arm64_v8a'
+      - name: Configure build
+        run:  qmake pbfplugin.pro
+      - name: Build project
+        run:  make -j4
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: libplugins_imageformats_libpbf_arm64-v8a.so
+          path: plugins/libplugins_imageformats_libpbf_arm64-v8a.so

.github/workflows/linux.yml

@@ -8,15 +8,18 @@ on:
 jobs:
   build:
     name: QtPBFImagePlugin
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        config: ['release', 'debug']
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install qtbase5-dev qtbase5-dev-tools qt5-qmake libprotobuf-dev protobuf-compiler zlib1g-dev
+          sudo apt-get install qtbase5-dev qtbase5-dev-tools qt5-qmake zlib1g-dev
       - name: Configure build
-        run: qmake pbfplugin.pro
+        run: qmake CONFIG+=${{ matrix.config }} pbfplugin.pro
       - name: Build project
-        run: make -j2
+        run: make -j4

.github/workflows/osx.yml

@@ -6,32 +6,22 @@ on:
       - master
 
 jobs:
-  qt5:
-    name: QtPBFImagePlugin Qt5 build
+  build:
+    name: QtPBFImagePlugin
     runs-on: macos-latest
     steps:
-      - name: Set environment variables
-        run: echo "PATH=/usr/local/opt/qt@5/bin:/usr/local/opt/protobuf@21/bin:$PATH" >> $GITHUB_ENV
       - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install dependencies
-        run: brew install qt@5 protobuf@21
+        uses: actions/checkout@v4
+      - name: Install Qt
+        uses: jurplel/install-qt-action@v4
+        with:
+          version: '6.8.2'
       - name: Configure build
-        run: qmake PROTOBUF=/usr/local/opt/protobuf@21 pbfplugin.pro
-      - name: Build project
-        run: make -j3
-
-  qt6:
-    name: QtPBFImagePlugin Qt6 build
-    runs-on: macos-latest
-    steps:
-      - name: Set environment variables
-        run: echo "PATH=/usr/local/opt/qt@6/bin:/usr/local/opt/protobuf@21/bin:$PATH" >> $GITHUB_ENV
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install dependencies
-        run: brew install qt@6 protobuf@21
-      - name: Configure build
-        run: qmake PROTOBUF=/usr/local/opt/protobuf@21 pbfplugin.pro
+        run: qmake pbfplugin.pro QMAKE_APPLE_DEVICE_ARCHS="x86_64h arm64"
       - name: Build project
         run: make -j3
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          path: libpbf.dylib
+          name: libpbf.dylib

.gitignore

@@ -1,17 +1,9 @@
 # Object files
 *.o
 
-# Protobuf stuff
-protobuf/vector_tile.pb.cc
-protobuf/vector_tile.pb.h
-
 # Qt stuff
 /.qmake.stash
 moc_*.cpp
 moc_*.h
 qrc_*.cpp
 Makefile*
-
-# lib
-libpbf.so
-pbf.dylib

README.md

@@ -18,24 +18,39 @@ to fit the styles and available data (OpenMapTiles, Mapbox tiles).
 Due to a major design flaw in the Mapbox vector tiles specification - the zoom
 is not part of the PBF data - the plugin can not be used "as is", but passing
 the zoom level is necessary. This is done by exploiting the optional *format*
-parameter of the QImage constructor or the QImage::fromData() or
-QPixmap::loadFromData() functions. The zoom number is passed as ASCII string
+parameter of the QImage constructor or the *QImage::loadFromData()* or
+*QPixmap::loadFromData()* functions. The zoom number is passed as ASCII string
 to the functions:
 ```cpp
-QPixmap pm;
-pm.loadFromData(tileData, QString::number(zoom).toLatin1());
+QImage img;
+img.loadFromData(data, QByteArray::number(zoom));
 ```
-The plugin supports vector scaling using QImageReader's setScaledSize() method,
+
+For a complete code sample see the [pbf2png](https://github.com/tumic0/pbf2png)
+conversion utility.
+
+### HiDPI
+The plugin supports vector scaling using QImageReader's *setScaledSize()* method,
 so when used like in the following example:
 ```cpp
-QImageReader reader(file, QString::number(zoom).toLatin1());
+QImage img;
+QImageReader reader(file, QByteArray::number(zoom));
 reader.setScaledSize(QSize(1024, 1024));
-reader.read(&image);
+reader.read(&img);
 ```
 you will get 1024x1024px tiles with a pixel ratio of 2 (= HiDPI tiles).
 
-For a sample code see the [pbf2png](https://github.com/tumic0/pbf2png)
-conversion utility.
+### Overzoom
+Since version 3 of the plugin tile overzoom is supported. If you set *format*
+to `$zoom;$overzoom`:
+```cpp
+QImage img;
+QByteArray fmt(QByteArray::number(zoom) + ';' + QByteArray::number(overzoom));
+img.loadFromData(data, fmt);
+```
+you will get (512<<overzoom)x(512<<overzoom)px tiles with a pixel ratio of 1.
+When overzoom is combined with setScaledSize(), the base size is the overzoomed
+tile size.
 
 ## Styles
 The map style is loaded from the
@@ -52,48 +67,45 @@ repository.
 
 ## Build
 ### Requirements
-* Qt5 >= 5.11 or Qt6
-* Google Protocol Buffers (protobuf-lite)
+* Qt5 >= 5.15 or Qt6
 * Zlib
 
 ### Build steps
-#### Linux
+#### Linux, OS X and Android
 ```shell
 qmake pbfplugin.pro
 make
 ```
 #### Windows
 ```shell
-qmake PROTOBUF=path/to/protobuf ZLIB=path/to/zlib pbfplugin.pro
+qmake ZLIB=path/to/zlib pbfplugin.pro
 nmake
 ```
-#### OS X
-```shell
-qmake PROTOBUF=path/to/protobuf pbfplugin.pro
-make
-```
 
 ## Install
 Copy the plugin to the system Qt image plugins path to make it work. You may
-also set the QT_PLUGIN_PATH system variable before starting the application. For
-Linux, there are RPM and DEB [packages](https://build.opensuse.org/project/show/home:tumic:QtPBFImagePlugin)
+also set the QT_PLUGIN_PATH system variable before starting the application.
+For Linux, there are RPM and DEB [packages](https://build.opensuse.org/project/show/home:tumic:QtPBFImagePlugin)
 for most common distros available on OBS.
 
 ## Limitations
-* Only data that is part of the PBF file is displayed. External layers defined in the
-style are ignored.
-* Text PBF features must have a unique id (OpenMapTiles >= v3.7) for the text layout
-algorithm to work properly.
-* Expressions are not supported in the styles, only property functions are implemented.
+* Only data that is part of the PBF file is displayed. External layers defined
+in the style are ignored.
+* Text PBF features must have a unique id (OpenMapTiles >= v3.7) for the text
+layout algorithm to work properly. Additionally, the tile buffer must be large
+enough to contain all neighboring text features overlapping to the tile bounds
+(only data from the tile itself can be drawn to the resulting image).
+* Expressions are not supported in the styles, only property functions are
+implemented.
 
 ## Changelog
-[Changelog](https://build.opensuse.org/package/view_file/home:tumic:QtPBFImagePlugin/QtPBFImagePlugin/libqt5-qtpbfimageformat.changes)
+[Changelog](https://build.opensuse.org/projects/home:tumic:QtPBFImagePlugin/packages/QtPBFImagePlugin/files/qt6-qtpbfimageformat.changes)
 
 ## Status
 A picture is worth a thousand words.
 #### OpenMapTiles
 
-* Data: [MapTiler](https://github.com/tumic0/GPXSee-maps/blob/master/World/MapTiler.tpl)
+* Data: [MapTiler](https://github.com/tumic0/GPXSee-maps/blob/master/World/MapTiler-OpenMapTiles.tpl)
 * Style: [OSM-liberty](https://github.com/tumic0/QtPBFImagePlugin-styles/blob/master/OpenMapTiles/osm-liberty/style.json)
 
 ![osm-liberty 5](https://tumic0.github.io/QtPBFImagePlugin/images/osm-liberty-5.png)

pbfplugin.pro

@@ -2,13 +2,10 @@ TARGET  = pbf
 TEMPLATE = lib
 CONFIG += plugin
 QT += gui
-VERSION = 2.5
+VERSION = 4.2
 
-PROTOS = protobuf/vector_tile.proto
-include(protobuf/vector_tile.pri)
-
-INCLUDEPATH += ./protobuf
 HEADERS += src/pbfhandler.h \
+    src/data.h \
     src/pbfplugin.h \
     src/gzip.h \
     src/pbf.h \
@@ -23,6 +20,7 @@ HEADERS += src/pbfhandler.h \
     src/textitem.h \
     src/sprites.h
 SOURCES += src/pbfplugin.cpp \
+    src/data.cpp \
     src/pbfhandler.cpp \
     src/gzip.cpp \
     src/pbf.cpp \
@@ -39,25 +37,27 @@ RESOURCES += pbfplugin.qrc
 
 DEFINES += QT_NO_DEPRECATED_WARNINGS
 
-unix:!macx{
-    LIBS += -lprotobuf-lite \
-        -lz
+unix:!macx:!android {
+    LIBS += -lz
+
+    target.path += $$[QT_INSTALL_PLUGINS]/imageformats
+    INSTALLS += target
 }
 win32 {
-    INCLUDEPATH += $$PROTOBUF/include \
-        $$ZLIB/include
-    LIBS += $$PROTOBUF/lib/libprotobuf-lite.lib \
-        $$ZLIB/lib/zlibstatic.lib
+    INCLUDEPATH += $$ZLIB/include
+    LIBS += $$ZLIB/lib/zlibstatic.lib
 
     QMAKE_TARGET_PRODUCT = QtPBFImagePlugin
     QMAKE_TARGET_DESCRIPTION = Qt $$QT_VERSION MVT/PBF image plugin
-    QMAKE_TARGET_COPYRIGHT = Copyright (c) 2023 Martin Tuma
+    QMAKE_TARGET_COPYRIGHT = Copyright (c) 2018-2025 Martin Tuma
 }
 macx {
-    INCLUDEPATH += $$PROTOBUF/include
-    LIBS += $$PROTOBUF/lib/libprotobuf-lite.a \
-        -lz
+    LIBS += -lz
 }
+android {
+    LIBS += -lz
 
-target.path += $$[QT_INSTALL_PLUGINS]/imageformats
-INSTALLS += target
+    top_builddir=$$shadowed($$PWD)
+    DESTDIR = $$top_builddir/plugins
+    TARGET = $$qt5LibraryTarget(libpbf, "plugins/imageformats/")
+}

protobuf/vector_tile.pri

@@ -1,17 +0,0 @@
-INCLUDEPATH += $$PWD
-DEPENDPATH  += $$PWD
-
-protobuf_decl.name = protobuf headers
-protobuf_decl.input = PROTOS
-protobuf_decl.output = ${QMAKE_FILE_IN_PATH}/${QMAKE_FILE_BASE}.pb.h
-protobuf_decl.commands = protoc --cpp_out=${QMAKE_FILE_IN_PATH} --proto_path=${QMAKE_FILE_IN_PATH} ${QMAKE_FILE_NAME}
-protobuf_decl.variable_out = HEADERS
-QMAKE_EXTRA_COMPILERS += protobuf_decl
-
-protobuf_impl.name = protobuf sources
-protobuf_impl.input = PROTOS
-protobuf_impl.output = ${QMAKE_FILE_IN_PATH}/${QMAKE_FILE_BASE}.pb.cc
-protobuf_impl.depends = ${QMAKE_FILE_IN_PATH}/${QMAKE_FILE_BASE}.pb.h
-protobuf_impl.commands = $$escape_expand(\n)
-protobuf_impl.variable_out = SOURCES
-QMAKE_EXTRA_COMPILERS += protobuf_impl

protobuf/vector_tile.proto

@@ -1,78 +0,0 @@
-package vector_tile;
-
-option optimize_for = LITE_RUNTIME;
-
-message Tile {
-
-        // GeomType is described in section 4.3.4 of the specification
-        enum GeomType {
-             UNKNOWN = 0;
-             POINT = 1;
-             LINESTRING = 2;
-             POLYGON = 3;
-        }
-
-        // Variant type encoding
-        // The use of values is described in section 4.1 of the specification
-        message Value {
-                // Exactly one of these values must be present in a valid message
-                optional string string_value = 1;
-                optional float float_value = 2;
-                optional double double_value = 3;
-                optional int64 int_value = 4;
-                optional uint64 uint_value = 5;
-                optional sint64 sint_value = 6;
-                optional bool bool_value = 7;
-
-                extensions 8 to max;
-        }
-
-        // Features are described in section 4.2 of the specification
-        message Feature {
-                optional uint64 id = 1 [ default = 0 ];
-
-                // Tags of this feature are encoded as repeated pairs of
-                // integers.
-                // A detailed description of tags is located in sections
-                // 4.2 and 4.4 of the specification
-                repeated uint32 tags = 2 [ packed = true ];
-
-                // The type of geometry stored in this feature.
-                optional GeomType type = 3 [ default = UNKNOWN ];
-
-                // Contains a stream of commands and parameters (vertices).
-                // A detailed description on geometry encoding is located in 
-                // section 4.3 of the specification.
-                repeated uint32 geometry = 4 [ packed = true ];
-        }
-
-        // Layers are described in section 4.1 of the specification
-        message Layer {
-                // Any compliant implementation must first read the version
-                // number encoded in this message and choose the correct
-                // implementation for this version number before proceeding to
-                // decode other parts of this message.
-                required uint32 version = 15 [ default = 1 ];
-
-                required string name = 1;
-
-                // The actual features in this tile.
-                repeated Feature features = 2;
-
-                // Dictionary encoding for keys
-                repeated string keys = 3;
-
-                // Dictionary encoding for values
-                repeated Value values = 4;
-
-                // Although this is an "optional" field it is required by the specification.
-                // See https://github.com/mapbox/vector-tile-spec/issues/47
-                optional uint32 extent = 5 [ default = 4096 ];
-
-                extensions 16 to max;
-        }
-
-        repeated Layer layers = 3;
-
-        extensions 16 to 8191;
-}

src/data.cpp

@@ -0,0 +1,354 @@
+#include "data.h"
+
+#define TYPE(tag) (tag & 0x07)
+#define FIELD(tag) (tag >> 3)
+
+#define VARINT 0
+#define I64    1
+#define LEN    2
+#define I32    5
+
+struct CTX
+{
+	CTX(const QByteArray &ba)
+	  : bp(ba.constData()), be(bp + ba.size()), tag(0) {}
+
+	const char *bp;
+	const char *be;
+	quint32 tag;
+};
+
+static inline qint64 zigzag64decode(quint64 value)
+{
+	return static_cast<qint64>((value >> 1u) ^ static_cast<quint64>(
+	  -static_cast<qint64>(value & 1u)));
+}
+
+template<typename T>
+static bool varint(CTX &ctx, T &val)
+{
+	unsigned int shift = 0;
+	val = 0;
+
+	while (ctx.bp < ctx.be) {
+		val |= ((quint8)*ctx.bp & 0x7F) << shift;
+		shift += 7;
+		if (!((quint8)*ctx.bp++ & 0x80))
+			return true;
+	}
+
+	return false;
+}
+
+static bool length(CTX &ctx, qint32 &val)
+{
+	if (TYPE(ctx.tag) != LEN)
+		return false;
+
+	if (!varint(ctx, val))
+		return false;
+
+	return (val >= 0);
+}
+
+static bool str(CTX &ctx, QByteArray &val)
+{
+	qint32 len;
+
+	if (!length(ctx, len))
+		return false;
+	if (ctx.bp + len > ctx.be)
+		return false;
+
+/* In Qt5 the (later) conversion to QString is broken when the QByteArray is
+   not nul terminated so we have to use the "deep copy" constructor that
+   nul-terminates the byte array when it is created. */
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+	val = QByteArray(ctx.bp, len);
+#else
+	val = QByteArray::fromRawData(ctx.bp, len);
+#endif
+	ctx.bp += len;
+
+	return true;
+}
+
+static bool dbl(CTX &ctx, double &val)
+{
+	if (TYPE(ctx.tag) != I64)
+		return false;
+	if (ctx.bp + sizeof(val) > ctx.be)
+		return false;
+
+	memcpy(&val, ctx.bp, sizeof(val));
+	ctx.bp += sizeof(val);
+
+	return true;
+}
+
+static bool flt(CTX &ctx, float &val)
+{
+	if (TYPE(ctx.tag) != I32)
+		return false;
+	if (ctx.bp + sizeof(val) > ctx.be)
+		return false;
+
+	memcpy(&val, ctx.bp, sizeof(val));
+	ctx.bp += sizeof(val);
+
+	return true;
+}
+
+static bool packed(CTX &ctx, QVector<quint32> &vals)
+{
+	quint32 v;
+
+	if (TYPE(ctx.tag) == LEN) {
+		qint32 len;
+		if (!varint(ctx, len) || len < 0)
+			return false;
+		const char *ee = ctx.bp + len;
+		if (ee > ctx.be)
+			return false;
+		while (ctx.bp < ee) {
+			if (!varint(ctx, v))
+				return false;
+			vals.append(v);
+		}
+		return (ctx.bp == ee);
+	} else if (TYPE(ctx.tag) == VARINT) {
+		if (!varint(ctx, v))
+			return false;
+		vals.append(v);
+		return true;
+	} else
+		return false;
+}
+
+static bool skip(CTX &ctx)
+{
+	qint32 len = 0;
+
+	switch (TYPE(ctx.tag)) {
+		case VARINT:
+			return varint(ctx, len);
+		case I64:
+			len = 8;
+			break;
+		case LEN:
+			if (!varint(ctx, len) || len < 0)
+				return false;
+			break;
+		case I32:
+			len = 4;
+			break;
+		default:
+			return false;
+	}
+
+	if (ctx.bp + len > ctx.be)
+		return false;
+	ctx.bp += len;
+
+	return true;
+}
+
+static bool value(CTX &ctx, QVariant &val)
+{
+	QByteArray ba;
+	quint64 num;
+	double dnum;
+	float fnum;
+	qint32 len;
+
+	if (!length(ctx, len))
+		return false;
+
+	const char *ee = ctx.bp + len;
+	if (ee > ctx.be)
+		return false;
+
+	while (ctx.bp < ee) {
+		if (!varint(ctx, ctx.tag))
+			return false;
+
+		switch (FIELD(ctx.tag)) {
+			case 1:
+				if (!str(ctx, ba))
+					return false;
+				val = QVariant(ba);
+				break;
+			case 2:
+				if (!flt(ctx, fnum))
+					return false;
+				val = QVariant(fnum);
+				break;
+			case 3:
+				if (!dbl(ctx, dnum))
+					return false;
+				val = QVariant(dnum);
+				break;
+			case 4:
+				if (TYPE(ctx.tag) != VARINT)
+					return false;
+				if (!varint(ctx, num))
+					return false;
+				val = QVariant(static_cast<qint64>(num));
+				break;
+			case 5:
+				if (TYPE(ctx.tag) != VARINT)
+					return false;
+				if (!varint(ctx, num))
+					return false;
+				val = QVariant(num);
+				break;
+			case 6:
+				if (TYPE(ctx.tag) != VARINT)
+					return false;
+				if (!varint(ctx, num))
+					return false;
+				val = QVariant(zigzag64decode(num));
+				break;
+			case 7:
+				if (TYPE(ctx.tag) != VARINT)
+					return false;
+				if (!varint(ctx, num))
+					return false;
+				val = QVariant(num ? true : false);
+				break;
+			default:
+				if (!skip(ctx))
+					return false;
+		}
+	}
+
+	return (ctx.bp == ee);
+}
+
+static bool feature(CTX &ctx, Data::Feature &f)
+{
+	qint32 len;
+	quint32 e;
+
+	if (!length(ctx, len))
+		return false;
+
+	const char *ee = ctx.bp + len;
+	if (ee > ctx.be)
+		return false;
+
+	while (ctx.bp < ee) {
+		if (!varint(ctx, ctx.tag))
+			return false;
+
+		switch (FIELD(ctx.tag)) {
+			case 1:
+				if (TYPE(ctx.tag) != VARINT)
+					return false;
+				if (!varint(ctx, f.id))
+					return false;
+				break;
+			case 2:
+				if (!packed(ctx, f.tags))
+					return false;
+				break;
+			case 3:
+				if (TYPE(ctx.tag) != VARINT)
+					return false;
+				if (!varint(ctx, e))
+					return false;
+				if (e > Data::GeomType::POLYGON)
+					return false;
+				f.type = static_cast<Data::GeomType>(e);
+				break;
+			case 4:
+				if (!packed(ctx, f.geometry))
+					return false;
+				break;
+			default:
+				if (!skip(ctx))
+					return false;
+		}
+	}
+
+	return (ctx.bp == ee);
+}
+
+static bool layer(CTX &ctx, Data::Layer &l)
+{
+	qint32 len;
+
+	if (!length(ctx, len))
+		return false;
+
+	const char *ee = ctx.bp + len;
+	if (ee > ctx.be)
+		return false;
+
+	while (ctx.bp < ee) {
+		if (!varint(ctx, ctx.tag))
+			return false;
+
+		switch (FIELD(ctx.tag)) {
+			case 1:
+				if (!str(ctx, l.name))
+					return false;
+				break;
+			case 2:
+				l.features.append(Data::Feature());
+				if (!feature(ctx, l.features.last()))
+					return false;
+				break;
+			case 3:
+				l.keys.append(QByteArray());
+				if (!str(ctx, l.keys.last()))
+					return false;
+				break;
+			case 4:
+				l.values.append(QVariant());
+				if (!value(ctx, l.values.last()))
+					return false;
+				break;
+			case 5:
+				if (TYPE(ctx.tag) != VARINT)
+					return false;
+				if (!varint(ctx, l.extent))
+					return false;
+				break;
+			case 15:
+				if (TYPE(ctx.tag) != VARINT)
+					return false;
+				if (!varint(ctx, l.version))
+					return false;
+				break;
+			default:
+				if (!skip(ctx))
+					return false;
+		}
+	}
+
+	return (ctx.bp == ee);
+}
+
+bool Data::load(const QByteArray &ba)
+{
+	CTX ctx(ba);
+
+	while (ctx.bp < ctx.be) {
+		if (!varint(ctx, ctx.tag))
+			return false;
+
+		switch (FIELD(ctx.tag)) {
+			case 3:
+				_layers.append(Layer());
+				if (!layer(ctx, _layers.last()))
+					return false;
+				break;
+			default:
+				if (!skip(ctx))
+					return false;
+		}
+	}
+
+	return (ctx.bp == ctx.be);
+}

src/data.h

@@ -0,0 +1,47 @@
+#ifndef DATA_H
+#define DATA_H
+
+#include <QByteArray>
+#include <QVector>
+#include <QVariant>
+
+class Data
+{
+public:
+	enum GeomType {
+		UNKNOWN = 0,
+		POINT = 1,
+		LINESTRING = 2,
+		POLYGON = 3
+	};
+
+	struct Feature
+	{
+		Feature() : id(0), type(UNKNOWN) {}
+
+		quint64 id;
+		QVector<quint32> tags;
+		GeomType type;
+		QVector<quint32> geometry;
+	};
+
+	struct Layer
+	{
+		Layer() : version(1), extent(4096) {}
+
+		quint32 version;
+		QByteArray name;
+		QVector<Feature> features;
+		QVector<QByteArray> keys;
+		QVector<QVariant> values;
+		quint32 extent;
+	};
+
+	bool load(const QByteArray &ba);
+	const QVector<Layer> &layers() const {return _layers;}
+
+private:
+	QVector<Layer> _layers;
+};
+
+#endif // DATA_H

src/function.h

@@ -6,6 +6,7 @@
 #include <QColor>
 #include <QPair>
 #include <QString>
+#include <QJsonValue>
 
 class QJsonObject;
 

src/pbf.cpp

@@ -4,7 +4,6 @@
 #define LINE_TO    2
 #define CLOSE_PATH 7
 
-
 static inline qint32 zigzag32decode(quint32 value)
 {
 	return static_cast<qint32>((value >> 1u) ^ static_cast<quint32>(
@@ -16,37 +15,17 @@ static inline QPoint parameters(quint32 v1, quint32 v2)
 	return QPoint(zigzag32decode(v1), zigzag32decode(v2));
 }
 
-static QVariant value(const vector_tile::Tile_Value &val)
-{
-	if (val.has_bool_value())
-		return QVariant(val.bool_value());
-	else if (val.has_int_value())
-		return QVariant((qlonglong)val.int_value());
-	else if (val.has_sint_value())
-		return QVariant((qlonglong)val.sint_value());
-	else if (val.has_uint_value())
-		return QVariant((qulonglong)val.uint_value());
-	else if (val.has_float_value())
-		return QVariant(val.float_value());
-	else if (val.has_double_value())
-		return QVariant(val.double_value());
-	else if (val.has_string_value())
-		return QVariant(QString::fromStdString(val.string_value()));
-	else
-		return QVariant();
-}
-
-const QVariant *PBF::Feature::value(const QString &key) const
+const QVariant *PBF::Feature::value(const QByteArray &key) const
 {
 	const KeyHash &keys(_layer->keys());
 	KeyHash::const_iterator it(keys.find(key));
 	if (it == keys.constEnd())
 		return 0;
 
-	google::protobuf::uint32 index = *it;
-	for (int i = 0; i < _data->tags_size(); i = i + 2)
-		if (_data->tags(i) == index)
-			return &(_layer->values().at(_data->tags(i+1)));
+	quint32 index = *it;
+	for (int i = 0; i < _data->tags.size(); i = i + 2)
+		if (_data->tags.at(i) == index)
+			return &(_layer->values().at(_data->tags.at(i+1)));
 
 	return 0;
 }
@@ -56,15 +35,15 @@ QPainterPath PBF::Feature::path(const QSizeF &factor) const
 	QPoint cursor;
 	QPainterPath path;
 
-	for (int i = 0; i < _data->geometry_size(); i++) {
-		quint32 g = _data->geometry(i);
+	for (int i = 0; i < _data->geometry.size(); i++) {
+		quint32 g = _data->geometry.at(i);
 		unsigned cmdId = g & 0x7;
 		unsigned cmdCount = g >> 3;
 
 		if (cmdId == MOVE_TO) {
 			for (unsigned j = 0; j < cmdCount; j++) {
-				QPoint offset = parameters(_data->geometry(i+1),
-				  _data->geometry(i+2));
+				QPoint offset = parameters(_data->geometry.at(i+1),
+				  _data->geometry.at(i+2));
 				i += 2;
 				cursor += offset;
 				path.moveTo(QPointF(cursor.x() * factor.width(),
@@ -72,8 +51,8 @@ QPainterPath PBF::Feature::path(const QSizeF &factor) const
 			}
 		} else if (cmdId == LINE_TO) {
 			for (unsigned j = 0; j < cmdCount; j++) {
-				QPoint offset = parameters(_data->geometry(i+1),
-				  _data->geometry(i+2));
+				QPoint offset = parameters(_data->geometry.at(i+1),
+				  _data->geometry.at(i+2));
 				i += 2;
 				cursor += offset;
 				path.lineTo(QPointF(cursor.x() * factor.width(),
@@ -88,26 +67,23 @@ QPainterPath PBF::Feature::path(const QSizeF &factor) const
 	return path;
 }
 
-PBF::Layer::Layer(const vector_tile::Tile_Layer *data) : _data(data)
+PBF::Layer::Layer(const Data::Layer *layer) : _data(layer)
 {
-	_keys.reserve(data->keys_size());
-	for (int i = 0; i < data->keys_size(); i++)
-		_keys.insert(QString::fromStdString(data->keys(i)), i);
-	_values.reserve(data->values_size());
-	for (int i = 0; i < data->values_size(); i++)
-		_values.append(value(data->values(i)));
+	_keys.reserve(layer->keys.size());
+	for (int i = 0; i < layer->keys.size(); i++)
+		_keys.insert(layer->keys.at(i), i);
 
-	_features.reserve(data->features_size());
-	for (int i = 0; i < data->features_size(); i++)
-		_features.append(Feature(&(data->features(i)), this));
+	_features.reserve(layer->features.size());
+	for (int i = 0; i < layer->features.size(); i++)
+		_features.append(Feature(&(layer->features.at(i)), this));
 	std::sort(_features.begin(), _features.end());
 }
 
-PBF::PBF(const vector_tile::Tile &tile)
+PBF::PBF(const Data &data)
 {
-	for (int i = 0; i <  tile.layers_size(); i++) {
-		const vector_tile::Tile_Layer &layer = tile.layers(i);
-		_layers.insert(QString::fromStdString(layer.name()), new Layer(&layer));
+	for (int i = 0; i <  data.layers().size(); i++) {
+		const Data::Layer &layer = data.layers().at(i);
+		_layers.insert(layer.name, new Layer(&layer));
 	}
 }
 

src/pbf.h

@@ -5,10 +5,10 @@
 #include <QVector>
 #include <QHash>
 #include <QPainterPath>
-#include "vector_tile.pb.h"
+#include "data.h"
 
 
-typedef QHash<QString, google::protobuf::uint32> KeyHash;
+typedef QHash<QByteArray, quint32> KeyHash;
 
 class PBF
 {
@@ -19,17 +19,17 @@ public:
 	{
 	public:
 		Feature() : _data(0), _layer(0) {}
-		Feature(const vector_tile::Tile_Feature *data, const Layer *layer)
+		Feature(const Data::Feature *data, const Layer *layer)
 		  : _data(data), _layer(layer) {}
 
-		const QVariant *value(const QString &key) const;
-		vector_tile::Tile_GeomType type() const {return _data->type();}
+		const QVariant *value(const QByteArray &key) const;
+		Data::GeomType type() const {return _data->type;}
 		QPainterPath path(const QSizeF &factor) const;
 
 		friend bool operator<(const Feature &f1, const Feature &f2);
 
 	private:
-		const vector_tile::Tile_Feature *_data;
+		const Data::Feature *_data;
 		const Layer *_layer;
 	};
 
@@ -37,31 +37,30 @@ public:
 	{
 	public:
 
-		Layer(const vector_tile::Tile_Layer *data);
+		Layer(const Data::Layer *layer);
 
 		const QVector<Feature> &features() const {return _features;}
-		const QVector<QVariant> &values() const {return _values;}
+		const QVector<QVariant> &values() const {return _data->values;}
 		const KeyHash &keys() const {return _keys;}
-		const vector_tile::Tile_Layer *data() const {return _data;}
+		const Data::Layer *data() const {return _data;}
 
 	private:
-		const vector_tile::Tile_Layer *_data;
+		const Data::Layer *_data;
 		QVector<Feature> _features;
-		QVector<QVariant> _values;
 		KeyHash _keys;
 	};
 
 
-	PBF(const vector_tile::Tile &tile);
+	PBF(const Data &data);
 	~PBF();
 
-	const QHash<QString, Layer*> &layers() const {return _layers;}
+	const QHash<QByteArray, Layer*> &layers() const {return _layers;}
 
 private:
-	QHash<QString, Layer*> _layers;
+	QHash<QByteArray, Layer*> _layers;
 };
 
 inline bool operator<(const PBF::Feature &f1, const PBF::Feature &f2)
-  {return f1._data->id() < f2._data->id();}
+  {return f1._data->id < f2._data->id;}
 
 #endif // PBF_H

src/pbfhandler.cpp

@@ -3,6 +3,7 @@
 #include <QtEndian>
 #include <QDebug>
 #include "gzip.h"
+#include "data.h"
 #include "tile.h"
 #include "style.h"
 #include "pbfhandler.h"
@@ -73,22 +74,25 @@ bool PBFHandler::read(QImage *image)
 		}
 	} else if (isPlainPBF(magic))
 		ba = device()->readAll();
-	vector_tile::Tile data;
-	if (!data.ParseFromArray(ba.constData(), ba.size())) {
+	Data data;
+	if (!data.load(ba)) {
 		qCritical() << "Invalid PBF data";
 		return false;
 	}
 
-	bool ok;
-	int zoom = format().toInt(&ok);
+	QList<QByteArray> list(format().split(';'));
+	int zoom = list.size() ? list.first().toInt() : 0;
+	int overzoom = (list.size() > 1) ? list.at(1).toInt() : 0;
+
+	QSize scaledSize(_scaledSize.isValid()
+	  ? _scaledSize : QSize(TILE_SIZE, TILE_SIZE));
+	QSize size(scaledSize.width()<<overzoom,
+	  scaledSize.height()<<overzoom);
+	QPointF scale((qreal)scaledSize.width() / TILE_SIZE,
+	  (qreal)scaledSize.height() / TILE_SIZE);
 
-	QSize size = _scaledSize.isValid()
-	  ? _scaledSize : QSize(TILE_SIZE, TILE_SIZE);
-	QPointF scale = _scaledSize.isValid()
-	  ? QPointF((qreal)_scaledSize.width() / TILE_SIZE,
-		(qreal)_scaledSize.height() / TILE_SIZE) : QPointF(1.0, 1.0);
 	*image = QImage(size, QImage::Format_ARGB32_Premultiplied);
-	Tile tile(image, ok ? zoom : -1, scale);
+	Tile tile(image, zoom, scale);
 
 	_style->render(data, tile);
 

src/pbfhandler.h

@@ -11,7 +11,7 @@ class Style;
 class PBFHandler : public QImageIOHandler
 {
 public:
-	PBFHandler(const Style *style) : _style(style) {}
+	PBFHandler(Style *style) : _style(style) {}
 	~PBFHandler() {}
 
 	bool canRead() const;
@@ -24,7 +24,7 @@ public:
 	static bool canRead(QIODevice *device);
 
 private:
-	const Style *_style;
+	Style *_style;
 	QSize _scaledSize;
 };
 

src/sprites.cpp

@@ -4,22 +4,28 @@
 #include <QDebug>
 #include "sprites.h"
 
-
-/*
-	Loading the sprites atlas image must be deferred until all image plugins
-	are loaded, otherwise reading the image will cause a deadlock!
-*/
-static const QImage &atlas(const QString &fileName)
+static QImage sdf2img(const QImage &sdf, const QColor &color)
 {
-	static QImage img(fileName);
+	QImage img(sdf.convertToFormat(QImage::Format_ARGB32));
+	quint32 argb = color.rgba();
+	uchar *bits = img.bits();
+	int bpl = img.bytesPerLine();
+
+	for (int y = 0; y < img.height(); y++) {
+		for (int x = 0; x < img.width(); x++) {
+			quint32 *pixel =  (quint32*)(bits + y * bpl + x * 4);
+			*pixel = ((*pixel >> 24) < 192) ? 0 : argb;
+		}
+	}
+
 	return img;
 }
 
 Sprites::Sprite::Sprite(const QJsonObject &json)
+  : _pixelRatio(1.0), _sdf(false)
 {
 	int x, y, width, height;
 
-
 	if (json.contains("x") && json["x"].isDouble())
 		x = json["x"].toInt();
 	else
@@ -39,17 +45,14 @@ Sprites::Sprite::Sprite(const QJsonObject &json)
 
 	_rect = QRect(x, y, width, height);
 
-
 	if (json.contains("pixelRatio") && json["pixelRatio"].isDouble())
 		_pixelRatio = json["pixelRatio"].toDouble();
-	else
-		_pixelRatio = 1.0;
+	if (json.contains("sdf") && json["sdf"].isBool())
+		_sdf = json["sdf"].toBool();
 }
 
 bool Sprites::load(const QString &jsonFile, const QString &imageFile)
 {
-	_imageFile = imageFile;
-
 	QFile file(jsonFile);
 	if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
 		qCritical() << jsonFile << ": error opening file";
@@ -78,27 +81,60 @@ bool Sprites::load(const QString &jsonFile, const QString &imageFile)
 			qWarning() << it.key() << ": invalid sprite definition";
 	}
 
+	// Loading the sprites atlas image must be deferred until all image plugins
+	// are loaded, otherwise reading the image will cause a deadlock in Qt!
+	_imageFile = imageFile;
+
 	return true;
 }
 
-QImage Sprites::icon(const QString &name) const
+QImage Sprites::sprite(const Sprite &sprite, const QColor &color, qreal scale)
 {
-	if (_imageFile.isEmpty())
+	_lock.lock();
+	if (_init <= 0) {
+		if (_init < 0) {
+			_lock.unlock();
+			return QImage();
+		}
+
+		_img = QImage(_imageFile);
+		if (_img.isNull()) {
+			qWarning() << _imageFile << ": invalid sprite atlas image";
+			_init = -1;
+			_lock.unlock();
+			return QImage();
+		}
+
+		_init = 1;
+	}
+	_lock.unlock();
+
+	if (!_img.rect().contains(sprite.rect()))
 		return QImage();
 
-	const QImage &img = atlas(_imageFile);
-	if (img.isNull())
+	QImage img(_img.copy(sprite.rect()));
+	img.setDevicePixelRatio(sprite.pixelRatio());
+
+	if (sprite.sdf()) {
+		if (scale != 1.0) {
+			QSize size(img.size().width() * scale, img.size().height() * scale);
+			QImage simg(img.scaled(size, Qt::IgnoreAspectRatio,
+			  Qt::SmoothTransformation));
+			return sdf2img(simg, color);
+		} else
+			return sdf2img(img, color);
+	} else
+		return img;
+}
+
+QImage Sprites::icon(const QString &name, const QColor &color, qreal size)
+{
+	if (name.isNull())
 		return QImage();
 
-	QMap<QString, Sprite>::const_iterator it = _sprites.find(name);
+	QMap<QString, Sprite>::const_iterator it = _sprites.constFind(name);
 	if (it == _sprites.constEnd())
 		return QImage();
 
-	if (!img.rect().contains(it->rect()))
-		return QImage();
-
-	QImage ret(img.copy(it->rect()));
-	ret.setDevicePixelRatio(it->pixelRatio());
-
-	return ret;
+	return sprite(*it, color, size);
 }

src/sprites.h

@@ -5,16 +5,19 @@
 #include <QMap>
 #include <QImage>
 #include <QString>
+#include <QMutex>
 
 class QJsonObject;
 
 class Sprites
 {
 public:
+	Sprites() : _init(0) {}
 	bool load(const QString &jsonFile, const QString &imageFile);
 
 	bool isNull() const {return _imageFile.isNull();}
-	QImage icon(const QString &name) const;
+	QImage icon(const QString &name, const QColor &color = Qt::black,
+	  qreal size = 1.0);
 
 private:
 	class Sprite {
@@ -23,14 +26,21 @@ private:
 
 		const QRect &rect() const {return _rect;}
 		qreal pixelRatio() const {return _pixelRatio;}
+		bool sdf() const {return _sdf;}
 
 	private:
 		QRect _rect;
 		qreal _pixelRatio;
+		bool _sdf;
 	};
 
+	QImage sprite(const Sprite &sprite, const QColor &color, qreal scale);
+
 	QMap<QString, Sprite> _sprites;
+	QImage _img;
+	QMutex _lock;
 	QString _imageFile;
+	int _init;
 };
 
 #endif // SPRITES_H

src/style.cpp

@@ -8,23 +8,36 @@
 #include <QRegularExpression>
 #include <QDebug>
 #include "text.h"
-#include "color.h"
 #include "font.h"
 #include "tile.h"
 #include "pbf.h"
 #include "style.h"
 
 
-static vector_tile::Tile_GeomType geometryType(const QString &str)
+static Data::GeomType geometryType(const QString &str)
 {
 	if (str == "Point")
-		return vector_tile::Tile_GeomType_POINT;
+		return Data::GeomType::POINT;
 	else if (str == "LineString")
-		return vector_tile::Tile_GeomType_LINESTRING;
+		return Data::GeomType::LINESTRING;
 	else if (str == "Polygon")
-		return vector_tile::Tile_GeomType_POLYGON;
+		return Data::GeomType::POLYGON;
 	else
-		return vector_tile::Tile_GeomType_UNKNOWN;
+		return Data::GeomType::UNKNOWN;
+}
+
+static QVariant variant(const QJsonValue &val)
+{
+	switch (val.type()) {
+		case QJsonValue::String:
+			return QVariant(val.toString().toUtf8());
+		case QJsonValue::Double:
+		case QJsonValue::Bool:
+			return val.toVariant();
+		default:
+			qWarning() << val << ": invalid filter value";
+			return QVariant();
+	}
 }
 
 Style::Layer::Filter::Filter(const QJsonArray &json)
@@ -36,50 +49,50 @@ Style::Layer::Filter::Filter(const QJsonArray &json)
 	if (json.isEmpty())
 		INVALID_FILTER(json);
 
-	QString type = json.at(0).toString();
+	QString type(json.at(0).toString());
 
 	if (type == "==") {
 		if (json.size() != 3)
 			INVALID_FILTER(json);
 		if (json.at(1).toString() == "$type") {
 			_type = GeometryType;
-			_kv = QPair<QString, QVariant>(QString(),
+			_kv = QPair<QByteArray, QVariant>(QByteArray(),
 			  QVariant(geometryType(json.at(2).toString())));
 		} else {
 			_type = EQ;
-			_kv = QPair<QString, QVariant>(json.at(1).toString(),
-			  json.at(2).toVariant());
+			_kv = QPair<QByteArray, QVariant>(json.at(1).toString().toUtf8(),
+			  variant(json.at(2)));
 		}
 	} else if (type == "!=") {
 		if (json.size() != 3)
 			INVALID_FILTER(json);
 		_type = NE;
-		_kv = QPair<QString, QVariant>(json.at(1).toString(),
-		  json.at(2).toVariant());
+		_kv = QPair<QByteArray, QVariant>(json.at(1).toString().toUtf8(),
+		  variant(json.at(2)));
 	} else if (type == "<") {
 		if (json.size() != 3)
 			INVALID_FILTER(json);
 		_type = LT;
-		_kv = QPair<QString, QVariant>(json.at(1).toString(),
-		  json.at(2).toVariant());
+		_kv = QPair<QByteArray, QVariant>(json.at(1).toString().toUtf8(),
+		  variant(json.at(2)));
 	} else if (type == "<=") {
 		if (json.size() != 3)
 			INVALID_FILTER(json);
 		_type = LE;
-		_kv = QPair<QString, QVariant>(json.at(1).toString(),
-		  json.at(2).toVariant());
+		_kv = QPair<QByteArray, QVariant>(json.at(1).toString().toUtf8(),
+		  variant(json.at(2)));
 	} else if (type == ">") {
 		if (json.size() != 3)
 			INVALID_FILTER(json);
 		_type = GT;
-		_kv = QPair<QString, QVariant>(json.at(1).toString(),
-		  json.at(2).toVariant());
+		_kv = QPair<QByteArray, QVariant>(json.at(1).toString().toUtf8(),
+		  variant(json.at(2)));
 	} else if (type == ">=") {
 		if (json.size() != 3)
 			INVALID_FILTER(json);
 		_type = GE;
-		_kv = QPair<QString, QVariant>(json.at(1).toString(),
-		  json.at(2).toVariant());
+		_kv = QPair<QByteArray, QVariant>(json.at(1).toString().toUtf8(),
+		  variant(json.at(2)));
 	} else if (type == "all") {
 		_type = All;
 		for (int i = 1; i < json.size(); i++)
@@ -92,28 +105,32 @@ Style::Layer::Filter::Filter(const QJsonArray &json)
 		if (json.size() < 3)
 			INVALID_FILTER(json);
 		_type = In;
-		_kv = QPair<QString, QVariant>(json.at(1).toString(), QVariant());
+		_kv = QPair<QByteArray, QVariant>(json.at(1).toString().toUtf8(),
+		  QVariant());
 		for (int i = 2; i < json.size(); i++)
-			_set.insert(json.at(i).toString());
+			_set.insert(json.at(i).toString().toUtf8());
 	}  else if (type == "!in") {
 		if (json.size() < 3)
 			INVALID_FILTER(json);
 		_type = In;
 		_not = true;
-		_kv = QPair<QString, QVariant>(json.at(1).toString(), QVariant());
+		_kv = QPair<QByteArray, QVariant>(json.at(1).toString().toUtf8(),
+		  QVariant());
 		for (int i = 2; i < json.size(); i++)
-			_set.insert(json.at(i).toString());
+			_set.insert(json.at(i).toString().toUtf8());
 	} else if (type == "has") {
 		if (json.size() < 2)
 			INVALID_FILTER(json);
 		_type = Has;
-		_kv = QPair<QString, QVariant>(json.at(1).toString(), QVariant());
+		_kv = QPair<QByteArray, QVariant>(json.at(1).toString().toUtf8(),
+		  QVariant());
 	} else if (type == "!has") {
 		if (json.size() < 2)
 			INVALID_FILTER(json);
 		_type = Has;
 		_not = true;
-		_kv = QPair<QString, QVariant>(json.at(1).toString(), QVariant());
+		_kv = QPair<QByteArray, QVariant>(json.at(1).toString().toUtf8(),
+		  QVariant());
 	} else
 		INVALID_FILTER(json);
 }
@@ -183,7 +200,7 @@ bool Style::Layer::Filter::match(const PBF::Feature &feature) const
 			if (!(v = feature.value(_kv.first)))
 				return _not;
 			else
-				return _set.contains((*v).toString()) ^ _not;
+				return _set.contains((*v).toByteArray()) ^ _not;
 		case Has:
 			return (feature.value(_kv.first) ? true : false) ^ _not;
 		case All:
@@ -205,7 +222,7 @@ bool Style::Layer::Filter::match(const PBF::Feature &feature) const
 
 QString Style::Layer::Template::value(int zoom, const PBF::Feature &feature) const
 {
-	QRegularExpression rx("\\{[^\\}]*\\}");
+	static QRegularExpression rx("\\{[^\\}]*\\}");
 	QString text(_field.value(zoom));
 	QRegularExpressionMatchIterator it = rx.globalMatch(text);
 	QStringList keys;
@@ -217,7 +234,7 @@ QString Style::Layer::Template::value(int zoom, const PBF::Feature &feature) con
 	}
 	for (int i = 0; i < keys.size(); i++) {
 		const QString &key = keys.at(i);
-		const QVariant *val = feature.value(key);
+		const QVariant *val = feature.value(key.toUtf8());
 		text.replace(QString("{%1}").arg(key), val ? val->toString() : "");
 	}
 
@@ -258,6 +275,9 @@ Style::Layer::Paint::Paint(const QJsonObject &json)
 	_textHaloColor = FunctionC(json["text-halo-color"], QColor());
 	_textHaloWidth = FunctionF(json["text-halo-width"]);
 	_textHaloBlur = FunctionF(json["text-halo-blur"]);
+
+	// icon
+	_iconColor = FunctionC(json["icon-color"]);
 }
 
 QPen Style::Layer::Paint::pen(Type type, int zoom) const
@@ -293,7 +313,7 @@ QPen Style::Layer::Paint::pen(Type type, int zoom) const
 	return pen;
 }
 
-QBrush Style::Layer::Paint::brush(Type type, int zoom, const Sprites &sprites)
+QBrush Style::Layer::Paint::brush(Type type, int zoom, Sprites &sprites)
   const
 {
 	QColor color;
@@ -370,6 +390,7 @@ Style::Layer::Layout::Layout(const QJsonObject &json)
 
 	// icon
 	_icon = Template(FunctionS(json["icon-image"]));
+	_iconSize = FunctionF(json["icon-size"]);
 
 	// symbol
 	_symbolPlacement = FunctionS(json["symbol-placement"]);
@@ -483,7 +504,7 @@ Style::Layer::Layer(const QJsonObject &json)
 		_type = Symbol;
 
 	// source-layer
-	_sourceLayer = json["source-layer"].toString();
+	_sourceLayer = json["source-layer"].toString().toUtf8();
 
 	// zooms
 	if (json.contains("minzoom") && json["minzoom"].isDouble())
@@ -512,7 +533,7 @@ bool Style::Layer::match(int zoom, const PBF::Feature &feature) const
 	return _filter.match(feature);
 }
 
-void Style::Layer::setPathPainter(Tile &tile, const Sprites &sprites) const
+void Style::Layer::setPathPainter(Tile &tile, Sprites &sprites) const
 {
 	QPainter &p = tile.painter();
 	int zoom = tile.zoom();
@@ -545,14 +566,18 @@ void Style::Layer::setTextProperties(Tile &tile) const
 }
 
 void Style::Layer::addSymbol(Tile &tile, const QPainterPath &path,
-  const PBF::Feature &feature, const Sprites &sprites) const
+  const PBF::Feature &feature, Sprites &sprites) const
 {
-	QString text = _layout.text(tile.zoom(), feature);
-	if (text.isEmpty())
+	QString text(_layout.text(tile.zoom(), feature));
+	QString icon(_layout.icon(tile.zoom(), feature));
+	QColor color(_paint.iconColor(tile.zoom()));
+	qreal size(_layout.iconSize(tile.zoom()));
+	QImage img(sprites.icon(icon, color, size));
+
+	if (text.isEmpty() && img.isNull())
 		return;
 
-	QString icon = _layout.icon(tile.zoom(), feature);
-	tile.text().addLabel(text, sprites.icon(icon), path);
+	tile.text().addLabel(text, img, path);
 }
 
 static bool loadSprites(const QDir &styleDir, const QString &json,
@@ -565,7 +590,7 @@ static bool loadSprites(const QDir &styleDir, const QString &json,
 		if (QFileInfo::exists(spritesImg))
 			return sprites.load(spritesJSON, spritesImg);
 		else {
-			qCritical() << spritesImg << ": no such file";
+			qWarning() << spritesImg << ": no such file";
 			return false;
 		}
 	}
@@ -598,20 +623,20 @@ bool Style::load(const QString &fileName)
 				_layers.append(Layer(layers[i].toObject()));
 	}
 
-	QDir styleDir = QFileInfo(fileName).absoluteDir();
+	QDir styleDir(QFileInfo(fileName).absoluteDir());
 	loadSprites(styleDir, "sprite.json", "sprite.png", _sprites);
 	loadSprites(styleDir, "sprite@2x.json", "sprite@2x.png", _sprites2x);
 
 	return true;
 }
 
-const Sprites &Style::sprites(const QPointF &scale) const
+Sprites &Style::sprites(const QPointF &scale)
 {
 	return (scale.x() > 1.0 || scale.y() > 1.0)
 	  && !_sprites2x.isNull() ? _sprites2x : _sprites;
 }
 
-void Style::setupLayer(Tile &tile, const Layer &layer) const
+void Style::setupLayer(Tile &tile, const Layer &layer)
 {
 	if (layer.isSymbol())
 		layer.setTextProperties(tile);
@@ -619,7 +644,7 @@ void Style::setupLayer(Tile &tile, const Layer &layer) const
 		layer.setPathPainter(tile, sprites(tile.scale()));
 }
 
-void Style::drawBackground(Tile &tile) const
+void Style::drawBackground(Tile &tile)
 {
 	QRectF rect(QPointF(0, 0), QSizeF(tile.size().width() / tile.scale().x(),
 	  tile.size().height() / tile.scale().y()));
@@ -634,13 +659,10 @@ void Style::drawBackground(Tile &tile) const
 		_layers.first().setPathPainter(tile, _sprites);
 		tile.painter().drawPath(path);
 	}
-
-	//tile.painter().setPen(Qt::red);
-	//tile.painter().drawRect(rect);
 }
 
 void Style::drawFeature(const PBF::Feature &feature, const Layer &layer,
-  Tile &tile, const QSizeF &factor) const
+  Tile &tile, const QSizeF &factor)
 {
 	if (!layer.match(tile.zoom(), feature))
 		return;
@@ -656,17 +678,17 @@ void Style::drawFeature(const PBF::Feature &feature, const Layer &layer,
 }
 
 void Style::drawLayer(const PBF::Layer &pbfLayer, const Layer &styleLayer,
-  Tile &tile) const
+  Tile &tile)
 {
-	if (pbfLayer.data()->version() > 2)
+	if (pbfLayer.data()->version > 2)
 		return;
 
 	if (!styleLayer.isVisible())
 		return;
 
 	QSizeF factor(tile.size().width() / tile.scale().x() /
-	  (qreal)pbfLayer.data()->extent(), tile.size().height() / tile.scale().y()
-	  / (qreal)pbfLayer.data()->extent());
+	  (qreal)pbfLayer.data()->extent, tile.size().height() / tile.scale().y()
+	  / (qreal)pbfLayer.data()->extent);
 
 	tile.painter().save();
 	setupLayer(tile, styleLayer);
@@ -675,12 +697,12 @@ void Style::drawLayer(const PBF::Layer &pbfLayer, const Layer &styleLayer,
 	tile.painter().restore();
 }
 
-void Style::render(const PBF &data, Tile &tile) const
+void Style::render(const PBF &data, Tile &tile)
 {
 	drawBackground(tile);
 
 	for (int i = 0; i < _layers.size(); i++) {
-		QHash<QString, PBF::Layer*>::const_iterator it = data.layers().find(
+		QHash<QByteArray, PBF::Layer*>::const_iterator it = data.layers().find(
 		  _layers.at(i).sourceLayer());
 		if (it == data.layers().constEnd())
 			continue;
@@ -689,4 +711,11 @@ void Style::render(const PBF &data, Tile &tile) const
 	}
 
 	tile.text().render(&tile.painter());
+
+	//QRectF rect(QPointF(0, 0), QSizeF(tile.size().width() / tile.scale().x(),
+	//  tile.size().height() / tile.scale().y()));
+	//tile.painter().setPen(Qt::red);
+	//tile.painter().setBrush(Qt::NoBrush);
+	//tile.painter().setRenderHint(QPainter::Antialiasing, false);
+	//tile.painter().drawRect(rect);
 }

src/style.h

@@ -29,7 +29,7 @@ public:
 	Style(QObject *parent = 0) : QObject(parent) {}
 
 	bool load(const QString &fileName);
-	void render(const PBF &data, Tile &tile) const;
+	void render(const PBF &data, Tile &tile);
 
 private:
 	class Layer {
@@ -37,17 +37,17 @@ private:
 		Layer() : _type(Unknown), _minZoom(0), _maxZoom(24) {}
 		Layer(const QJsonObject &json);
 
-		const QString &sourceLayer() const {return _sourceLayer;}
+		const QByteArray &sourceLayer() const {return _sourceLayer;}
 		bool isPath() const {return (_type == Line || _type == Fill);}
 		bool isBackground() const {return (_type == Background);}
 		bool isSymbol() const {return (_type == Symbol);}
 		bool isVisible() const {return (_layout.visible());}
 
 		bool match(int zoom, const PBF::Feature &feature) const;
-		void setPathPainter(Tile &tile, const Sprites &sprites) const;
+		void setPathPainter(Tile &tile, Sprites &sprites) const;
 		void setTextProperties(Tile &tile) const;
 		void addSymbol(Tile &tile, const QPainterPath &path,
-		  const PBF::Feature &feature, const Sprites &sprites) const;
+		  const PBF::Feature &feature, Sprites &sprites) const;
 
 	private:
 		enum Type {
@@ -74,8 +74,8 @@ private:
 
 			Type _type;
 			bool _not;
-			QSet<QString> _set;
-			QPair<QString, QVariant> _kv;
+			QSet<QByteArray> _set;
+			QPair<QByteArray, QVariant> _kv;
 			QVector<Filter> _filters;
 		};
 
@@ -103,6 +103,8 @@ private:
 			  {return _text.value(zoom, feature).trimmed();}
 			QString icon(int zoom, const PBF::Feature &feature) const
 			  {return _icon.value(zoom, feature);}
+			qreal iconSize(int zoom) const
+			  {return _iconSize.value(zoom);}
 			QFont font(int zoom) const;
 			Qt::PenCapStyle lineCap(int zoom) const;
 			Qt::PenJoinStyle lineJoin(int zoom) const;
@@ -116,6 +118,7 @@ private:
 
 			Template _text;
 			Template _icon;
+			FunctionF _iconSize;
 			FunctionF _textSize;
 			FunctionF _textMaxWidth;
 			FunctionF _textMaxAngle;
@@ -135,13 +138,15 @@ private:
 			Paint(const QJsonObject &json);
 
 			QPen pen(Layer::Type type, int zoom) const;
-			QBrush brush(Layer::Type type, int zoom, const Sprites &sprites)
+			QBrush brush(Layer::Type type, int zoom, Sprites &sprites)
 			  const;
 			qreal opacity(Layer::Type type, int zoom) const;
 			bool antialias(Layer::Type type, int zoom) const;
 			Text::Halo halo(int zoom) const
 			  {return Text::Halo(_textHaloColor.value(zoom),
 			  _textHaloWidth.value(zoom), _textHaloBlur.value(zoom));}
+			QColor iconColor(int zoom) const
+			  {return _iconColor.value(zoom);}
 
 		private:
 			FunctionC _textColor;
@@ -150,6 +155,7 @@ private:
 			FunctionC _fillColor;
 			FunctionC _fillOutlineColor;
 			FunctionC _backgroundColor;
+			FunctionC _iconColor;
 			FunctionF _fillOpacity;
 			FunctionF _lineOpacity;
 			FunctionF _lineWidth;
@@ -161,21 +167,21 @@ private:
 		};
 
 		Type _type;
-		QString _sourceLayer;
+		QByteArray _sourceLayer;
 		int _minZoom, _maxZoom;
 		Filter _filter;
 		Layout _layout;
 		Paint _paint;
 	};
 
-	const Sprites &sprites(const QPointF &scale) const;
+	Sprites &sprites(const QPointF &scale);
 
-	void drawBackground(Tile &tile) const;
-	void setupLayer(Tile &tile, const Layer &layer) const;
+	void drawBackground(Tile &tile);
+	void setupLayer(Tile &tile, const Layer &layer);
 	void drawFeature(const PBF::Feature &feature, const Layer &layer,
-	  Tile &tile, const QSizeF &factor) const;
+	  Tile &tile, const QSizeF &factor);
 	void drawLayer(const PBF::Layer &pbfLayer, const Layer &styleLayer,
-	  Tile &tile) const;
+	  Tile &tile);
 
 	QVector<Layer> _layers;
 	Sprites _sprites, _sprites2x;

src/text.cpp

@@ -14,15 +14,10 @@ Text::~Text()
 
 void Text::render(QPainter *painter) const
 {
-	QSet<QString> set;
-
 	for (int i = 0; i < _items.size(); i++) {
 		const TextItem *ti = _items.at(i);
-		if (ti->isVisible() && _sceneRect.intersects(ti->boundingRect())
-		  && !set.contains(ti->text())) {
+		if (ti->isVisible() && _sceneRect.intersects(ti->boundingRect()))
 			ti->paint(painter);
-			set.insert(ti->text());
-		}
 	}
 }
 
@@ -51,6 +46,8 @@ void Text::addLabel(const QString &text, const QImage &icon,
 	} else {
 		switch (_placement) {
 			case Line:
+				if (text.isEmpty())
+					return;
 				ti = new TextPathItem(text, path, _font, _maxAngle, _sceneRect);
 				break;
 			case LineCenter:
@@ -73,7 +70,7 @@ void Text::addLabel(const QString &text, const QImage &icon,
 	ti->setHalo(_halo);
 	addItem(ti);
 
-	QList<TextItem*> ci = collidingItems(ti);
+	QList<TextItem*> ci(collidingItems(ti));
 	for (int i = 0; i < ci.size(); i++)
 		ci[i]->setVisible(false);
 }

src/textpathitem.cpp

@@ -2,13 +2,6 @@
 #include <QPainter>
 #include "textpathitem.h"
 
-
-#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
-#define INTERSECTS intersect
-#else // QT 5.15
-#define INTERSECTS intersects
-#endif // QT 5.15
-
 static void swap(const QLineF &line, QPointF *p1, QPointF *p2)
 {
 
@@ -30,10 +23,10 @@ static bool intersection(const QLineF &line, const QRectF &rect, QPointF *p1,
 {
 	QPointF *p = p1;
 
-	if (line.INTERSECTS(QLineF(rect.topLeft(), rect.topRight()), p)
+	if (line.intersects(QLineF(rect.topLeft(), rect.topRight()), p)
 	  == QLineF::BoundedIntersection)
 		p = p2;
-	if (line.INTERSECTS(QLineF(rect.topLeft(), rect.bottomLeft()), p)
+	if (line.intersects(QLineF(rect.topLeft(), rect.bottomLeft()), p)
 	  == QLineF::BoundedIntersection) {
 		if (p == p2) {
 			swap(line, p1, p2);
@@ -41,7 +34,7 @@ static bool intersection(const QLineF &line, const QRectF &rect, QPointF *p1,
 		}
 		p = p2;
 	}
-	if (line.INTERSECTS(QLineF(rect.bottomRight(), rect.bottomLeft()), p)
+	if (line.intersects(QLineF(rect.bottomRight(), rect.bottomLeft()), p)
 	  == QLineF::BoundedIntersection) {
 		if (p == p2) {
 			swap(line, p1, p2);
@@ -49,7 +42,7 @@ static bool intersection(const QLineF &line, const QRectF &rect, QPointF *p1,
 		}
 		p = p2;
 	}
-	if (line.INTERSECTS(QLineF(rect.bottomRight(), rect.topRight()), p)
+	if (line.intersects(QLineF(rect.bottomRight(), rect.topRight()), p)
 	  == QLineF::BoundedIntersection) {
 		if (p == p2) {
 			swap(line, p1, p2);
@@ -64,16 +57,16 @@ static bool intersection(const QLineF &line, const QRectF &rect, QPointF *p1,
 
 static bool intersection(const QLineF &line, const QRectF &rect, QPointF *p)
 {
-	if (line.INTERSECTS(QLineF(rect.topLeft(), rect.topRight()), p)
+	if (line.intersects(QLineF(rect.topLeft(), rect.topRight()), p)
 	  == QLineF::BoundedIntersection)
 		return true;
-	if (line.INTERSECTS(QLineF(rect.topLeft(), rect.bottomLeft()), p)
+	if (line.intersects(QLineF(rect.topLeft(), rect.bottomLeft()), p)
 	  == QLineF::BoundedIntersection)
 		return true;
-	if (line.INTERSECTS(QLineF(rect.bottomRight(), rect.bottomLeft()), p)
+	if (line.intersects(QLineF(rect.bottomRight(), rect.bottomLeft()), p)
 	  == QLineF::BoundedIntersection)
 		return true;
-	if (line.INTERSECTS(QLineF(rect.bottomRight(), rect.topRight()), p)
+	if (line.intersects(QLineF(rect.bottomRight(), rect.topRight()), p)
 	  == QLineF::BoundedIntersection)
 		return true;
 
@@ -171,6 +164,12 @@ static QList<QPolygonF> polyLines(const QPainterPath &path, const QRectF &rect)
 	return lines;
 }
 
+static qreal diff(qreal a1, qreal a2)
+{
+	qreal d = qAbs(a1 - a2);
+	return (d > 180) ? 360 - d : d;
+}
+
 static QPainterPath textPath(const QPainterPath &path, qreal textWidth,
   qreal maxAngle, qreal charWidth, const QRectF &tileRect)
 {
@@ -189,11 +188,16 @@ static QPainterPath textPath(const QPainterPath &path, qreal textWidth,
 			qreal sl = l.length();
 			qreal a = l.angle();
 
-			if ((sl < charWidth) || (j > 1 && qAbs(angle - a) > maxAngle)) {
+			if (sl < charWidth) {
 				if (length > textWidth)
 					return subpath(pl, last, j - 1, length - textWidth);
 				last = j;
 				length = 0;
+			} else if (j > 1 && diff(angle, a) > maxAngle) {
+				if (length > textWidth)
+					return subpath(pl, last, j - 1, length - textWidth);
+				last = j - 1;
+				length = sl;
 			} else
 				length += sl;
 

src/textpointitem.cpp

@@ -85,7 +85,7 @@ TextPointItem::TextPointItem(const QString &text, const QPointF &pos,
   : TextItem(text, font), _pos(pos), _icon(icon), _maxWidth(maxWidth),
   _anchor(anchor)
 {
-	_textRect = fuzzyBoundingRect();
+	_textRect = text.isEmpty() ? QRectF() : fuzzyBoundingRect();
 	_boundingRect = moveTextRect(_textRect);
 
 	if (!_icon.isNull()) {

style/style.json

@@ -2265,7 +2265,6 @@
       "source": "openmaptiles",
       "source-layer": "building",
       "minzoom": 13,
-      "maxzoom": 14,
       "layout": {
         "visibility": "visible"
       },
@@ -4059,4 +4058,4 @@
     }
   ],
   "id": "osm-liberty"
-}
+}