Merge branch 'master' into linux-wrapper

Conflicts: include/llmr/style/sprite.hpp
2014-02-21 12:26:16 +01:00
parent baa4981c3b 0306e77ff0
commit 5f64ecc3cc
33 changed files with 700 additions and 103 deletions
--- a/bin/convert-style.js
+++ b/bin/convert-style.js
@@ -6,8 +6,6 @@ var style = require('./style.js');
 var Protobuf = require('./protobuf.js');
 var fs = require('fs');

-// var fs = require('fs');
-
 var pbf = new Protobuf();

 // enum
@@ -181,23 +179,47 @@ function createLineClass(layer, name) {
    return pbf;
 }

+function createMarkerClass(layer, name) {
+    var pbf = new Protobuf();
+    pbf.writeTaggedString(1 /* layer_name */, name);
+
+    if ('color' in layer) {
+        var color = layer.color.match(/^#([0-9a-f]{6})$/i);
+        if (!color) {
+            console.warn('invalid color');
+        } else {
+            pbf.writeTaggedUInt32(3 /* color */, parseInt(color[1] + 'ff', 16));
+        }
+    }
+
+    if ('size' in layer) {
+        pbf.writeMessage(4 /* size */, convertProperty(layer.size));
+    }
+
+    if ('opacity' in layer) {
+        pbf.writeMessage(6 /* opacity */, convertProperty(layer.opacity));
+    }
+
+    if ('image' in layer) {
+        pbf.writeTaggedString(8 /* image */, layer.image);
+    }
+
+    return pbf;
+}

 function createClass(klass) {
    var pbf = new Protobuf();
    pbf.writeTaggedString(1 /* name */, klass.name);
    for (var name in klass.layers) {
        switch (klass.layers[name].type) {
-            case 'fill': pbf.writeMessage(2 /* fill */, createFillClass(klass.layers[name], name)); break;
-            case 'line': pbf.writeMessage(3 /* line */, createLineClass(klass.layers[name], name)); break;
+            case 'fill':   pbf.writeMessage(2 /* fill */,   createFillClass(klass.layers[name], name)); break;
+            case 'line':   pbf.writeMessage(3 /* line */,   createLineClass(klass.layers[name], name)); break;
+            case 'marker': pbf.writeMessage(4 /* marker */, createMarkerClass(klass.layers[name], name)); break;
        }
    }
    return pbf;
 }

-
-
-
-
 for (var name in style.buckets) {
    var bucket = style.buckets[name];
    pbf.writeMessage(1 /* bucket */, createBucket(bucket, name));
--- a/bin/style.js
+++ b/bin/style.js
@@ -140,6 +140,8 @@ module.exports = {
                },
                "alcohol": {
                    "type": "marker",
+                    "color": "#999999",
+                    "size": 24,
                    "image": "alcohol-shop"
                }
            }
--- a/include/llmr/geometry/point_buffer.hpp
+++ b/include/llmr/geometry/point_buffer.hpp
@@ -0,0 +1,19 @@
+#ifndef LLMR_GEOMETRY_POINT_BUFFER
+#define LLMR_GEOMETRY_POINT_BUFFER
+
+#include "buffer.hpp"
+
+namespace llmr {
+
+    class PointVertexBuffer : public Buffer<
+    4 // 2 coordinates per vertex (== 4 bytes)
+    > {
+    public:
+        typedef int16_t vertex_type;
+
+        void add(vertex_type x, vertex_type y);
+    };
+
+}
+
+#endif
--- a/include/llmr/map/map.hpp
+++ b/include/llmr/map/map.hpp
@@ -20,7 +20,7 @@ public:
    ~Map();

    /* setup */
-    void setup();
+    void setup(float pixelRatio = 1);
    void loadStyle(const uint8_t *const data, uint32_t bytes);
    void loadSprite(const std::string& url);
    void loadSettings();
@@ -29,13 +29,13 @@ public:
    /* callback */
    bool render();
    void cancelAnimations();
-    void tileLoaded(std::shared_ptr<Tile> tile);
-    void tileFailed(std::shared_ptr<Tile> tile);

    /* position */
    void moveBy(double dx, double dy, double duration = 0);
    void setLonLat(double lon, double lat, double duration = 0);
    void getLonLat(double &lon, double &lat) const;
+    void startPanning();
+    void stopPanning();
    void resetPosition();

    /* scale */
@@ -47,12 +47,16 @@ public:
    void setLonLatZoom(double lon, double lat, double zoom, double duration = 0);
    void getLonLatZoom(double &lon, double &lat, double &zoom) const;
    void resetZoom();
+    void startScaling();
+    void stopScaling();

    /* rotation */
    void rotateBy(double cx, double cy, double sx, double sy, double ex, double ey, double duration = 0);
    void setAngle(double angle, double cx = -1, double cy = -1, double duration = 0);
    double getAngle() const;
    void resetNorth();
+    void startRotating();
+    void stopRotating();

    void toggleDebug();

@@ -75,6 +79,8 @@ private:
    int32_t min_zoom;
    int32_t max_zoom;

+    float pixel_ratio;
+
    std::forward_list<std::shared_ptr<Tile>> tiles;
    std::forward_list<std::shared_ptr<Tile>> historic_tiles;
 };
--- a/include/llmr/map/tile.hpp
+++ b/include/llmr/map/tile.hpp
@@ -23,6 +23,7 @@ class VectorTile;
 class VectorTileLayer;
 class FillVertexBuffer;
 class LineVertexBuffer;
+class PointVertexBuffer;
 class TriangleElementsBuffer;
 class LineElementsBuffer;
 class PointElementsBuffer;
@@ -59,6 +60,7 @@ public:
    std::shared_ptr<Bucket> createBucket(const VectorTile& tile, const BucketDescription& bucket_desc);
    std::shared_ptr<Bucket> createFillBucket(const VectorTileLayer& layer, const BucketDescription& bucket_desc);
    std::shared_ptr<Bucket> createLineBucket(const VectorTileLayer& layer, const BucketDescription& bucket_desc);
+    std::shared_ptr<Bucket> createPointBucket(const VectorTileLayer& layer, const BucketDescription& bucket_desc);

    void cancel();

@@ -77,6 +79,7 @@ public:

    std::shared_ptr<FillVertexBuffer> fillVertexBuffer;
    std::shared_ptr<LineVertexBuffer> lineVertexBuffer;
+    std::shared_ptr<PointVertexBuffer> pointVertexBuffer;

    std::shared_ptr<TriangleElementsBuffer> triangleElementsBuffer;
    std::shared_ptr<LineElementsBuffer> lineElementsBuffer;
--- a/include/llmr/map/transform.hpp
+++ b/include/llmr/map/transform.hpp
@@ -42,6 +42,14 @@ public:
    void getLonLat(double& lon, double& lat) const;
    void getLonLatZoom(double& lon, double& lat, double& zoom) const;

+    // Animations
+    void startPanning();
+    void stopPanning();
+    void startRotating();
+    void stopRotating();
+    void startScaling();
+    void stopScaling();
+
    // Temporary
    void mapCornersToBox(uint32_t z, box& b) const;

@@ -61,6 +69,10 @@ public:

    float pixelRatio = 1;

+    bool rotating = false;
+    bool scaling = false;
+    bool panning = false;
+
 private:
    double x = 0, y = 0; // pixel values of the map center in the current scale
    double angle = 0;
@@ -72,7 +84,10 @@ private:
    // cache values for spherical mercator math
    double zc, Bc, Cc;

-    std::forward_list<util::animation> animations;
+    std::forward_list<std::shared_ptr<util::animation>> animations;
+    std::shared_ptr<util::animation> scale_timeout;
+    std::shared_ptr<util::animation> rotate_timeout;
+    std::shared_ptr<util::animation> pan_timeout;
 };

 }
--- a/include/llmr/platform/platform.hpp
+++ b/include/llmr/platform/platform.hpp
@@ -6,7 +6,7 @@
 #include <string>

 #define kTileURL "http://a.gl-api-us-east-1.tilestream.net/v3/mapbox.mapbox-streets-v4/%d/%d/%d.gl.pbf"
-#define kSpriteURL "http://mapbox-kkaefer.s3.amazonaws.com/static/sprite"
+#define kSpriteURL "https://dl.dropboxusercontent.com/u/575564/sprite"

 namespace llmr {

@@ -14,16 +14,16 @@ class Tile;

 namespace platform {

-// Restarts painting. This could for example trigger the event loop of the
-// controlling application.
-void restart(void *obj);
+// Restarts painting. This could for example trigger the event loop of the controlling application.
+void restart();

 struct Response {
    int16_t code = -1;
    std::string body;
 };

-void request_http(std::string url, std::function<void(Response&)> func, std::function<void()> cb);
+// Makes an HTTP request of a URL on a background thread, calls a function with the results on the same thread, and finally calls a callback function on the main thread.
+void request_http(std::string url, std::function<void(Response&)> background_function, std::function<void()> foreground_callback);

 // Returns a relative timestamp in seconds. This value must be monotonic.
 double time();
--- a/include/llmr/renderer/painter.hpp
+++ b/include/llmr/renderer/painter.hpp
@@ -12,6 +12,7 @@
 #include <llmr/renderer/shader-pattern.hpp>
 #include <llmr/renderer/shader-line.hpp>
 #include <llmr/renderer/shader-linejoin.hpp>
+#include <llmr/renderer/shader-point.hpp>


 namespace llmr {
@@ -23,6 +24,7 @@ class Tile;

 class FillBucket;
 class LineBucket;
+class PointBucket;

 class Painter : private util::noncopyable {
 public:
@@ -36,6 +38,7 @@ public:
    void renderBackground();
    void renderFill(FillBucket& bucket, const std::string& layer_name, const Tile::ID& id);
    void renderLine(LineBucket& bucket, const std::string& layer_name, const Tile::ID& id);
+    void renderPoint(PointBucket& bucket, const std::string& layer_name, const Tile::ID& id);

 private:
    void setupShaders();
@@ -63,6 +66,7 @@ private:
    std::unique_ptr<LineShader> lineShader;
    std::unique_ptr<LinejoinShader> linejoinShader;
    std::unique_ptr<PatternShader> patternShader;
+    std::unique_ptr<PointShader> pointShader;

    // Set up the stencil quad we're using to generate the stencil mask.
    VertexBuffer tileStencilBuffer = {
--- a/include/llmr/renderer/point_bucket.hpp
+++ b/include/llmr/renderer/point_bucket.hpp
@@ -0,0 +1,51 @@
+#ifndef LLMR_RENDERER_POINTBUCKET
+#define LLMR_RENDERER_POINTBUCKET
+
+#include <llmr/renderer/bucket.hpp>
+#include <llmr/style/bucket_description.hpp>
+#include <llmr/geometry/elements_buffer.hpp>
+#include <llmr/geometry/point_buffer.hpp>
+
+#include <vector>
+#include <memory>
+
+#ifndef BUFFER_OFFSET
+#define BUFFER_OFFSET(i) ((char *)nullptr + (i))
+#endif
+
+namespace llmr {
+
+class Style;
+class PointVertexBuffer;
+class BucketDescription;
+class PointShader;
+struct Coordinate;
+struct pbf;
+
+class PointBucket : public Bucket {
+public:
+    PointBucket(const std::shared_ptr<PointVertexBuffer>& vertexBuffer,
+                const BucketDescription& bucket_desc);
+
+    virtual void render(Painter& painter, const std::string& layer_name, const Tile::ID& id);
+
+    void addGeometry(pbf& data);
+
+    bool hasPoints() const;
+
+    void drawPoints(PointShader& shader);
+
+public:
+    const BucketGeometryDescription geometry;
+
+private:
+    std::shared_ptr<PointVertexBuffer> vertexBuffer;
+    VertexArrayObject<PointShader> array;
+
+    const uint32_t vertex_start;
+    uint32_t vertex_end = 0;
+};
+
+}
+
+#endif
--- a/include/llmr/renderer/shader-point.hpp
+++ b/include/llmr/renderer/shader-point.hpp
@@ -0,0 +1,41 @@
+#ifndef LLMR_RENDERER_SHADER_POINT
+#define LLMR_RENDERER_SHADER_POINT
+
+#include "shader.hpp"
+
+namespace llmr {
+
+class PointShader : public Shader {
+public:
+    PointShader();
+
+    void bind(char *offset);
+
+    void setImage(int32_t image);
+    void setColor(const std::array<float, 4>& color);
+    void setPointTopLeft(const std::array<float, 2>& point_tl);
+    void setPointBottomRight(const std::array<float, 2>& point_br);
+    void setSize(float size);
+
+private:
+    int32_t a_pos = -1;
+
+    int32_t image = -1;
+    int32_t u_image = -1;
+
+    std::array<float, 4> color = {};
+    int32_t u_color = -1;
+
+    std::array<float, 2> point_tl = {};
+    int32_t u_point_tl = -1;
+
+    std::array<float, 2> point_br = {};
+    int32_t u_point_br = -1;
+
+    float size = 0;
+    int32_t u_size = -1;
+};
+
+}
+
+#endif
--- a/include/llmr/shader/shaders.hpp
+++ b/include/llmr/shader/shaders.hpp
@@ -16,6 +16,7 @@ enum {
    OUTLINE_SHADER,
    PATTERN_SHADER,
    PLAIN_SHADER,
+    POINT_SHADER,
    SHADER_COUNT
 };

--- a/include/llmr/style/class_description.hpp
+++ b/include/llmr/style/class_description.hpp
@@ -12,6 +12,7 @@ class ClassDescription {
 public:
    std::map<std::string, FillClass> fill;
    std::map<std::string, LineClass> line;
+    std::map<std::string, PointClass> point;
 };


--- a/include/llmr/style/properties.hpp
+++ b/include/llmr/style/properties.hpp
@@ -60,8 +60,22 @@ struct FunctionProperty {
    inline T operator()(float z) const { return function(z, values); }
 };

+struct PointClass {
+    FunctionProperty<bool> hidden;
+    FunctionProperty<float> size;
+    Color color = {{ 0, 0, 0, 1 }};
+    FunctionProperty<float> opacity = 1;
+    std::string image;
+};
+
+struct PointProperties {
+    bool hidden = false;
+    float size = 0;
+    Color color = {{ 0, 0, 0, 1 }};
+    float opacity = 1.0;
+    std::string image;
+};

-// LineClass is the information we parse from the stylesheet
 struct LineClass {
    FunctionProperty<bool> hidden;
    FunctionProperty<float> width;
@@ -70,7 +84,6 @@ struct LineClass {
    FunctionProperty<float> opacity = 1;
 };

-// LineProperties is the one we resolve this to.
 struct LineProperties {
    bool hidden = false;
    float width = 0;
@@ -79,9 +92,6 @@ struct LineProperties {
    float opacity = 1.0;
 };

-
-
-
 struct FillClass {
    FunctionProperty<bool> hidden;
    Winding winding = Winding::NonZero;
--- a/include/llmr/style/sprite.hpp
+++ b/include/llmr/style/sprite.hpp
@@ -36,7 +36,7 @@ class Sprite : public std::enable_shared_from_this<Sprite> {
 public:
    ~Sprite();

-    void load(const std::string& base_url);
+    void load(const std::string& base_url, float pixelRatio = 1);
    void bind(bool linear = false);

    ImagePosition getPosition(const std::string& name, bool repeating = false);
--- a/include/llmr/style/style.hpp
+++ b/include/llmr/style/style.hpp
@@ -36,6 +36,7 @@ private:
    static std::pair<std::string, ClassDescription> parseClass(pbf data);
    static std::pair<std::string, FillClass> parseFillClass(pbf data);
    static std::pair<std::string, LineClass> parseLineClass(pbf data);
+    static std::pair<std::string, PointClass> parsePointClass(pbf data);
    template <typename T> static FunctionProperty<T> parseProperty(pbf data);
    static Color parseColor(pbf& data);

@@ -53,6 +54,7 @@ public:
    struct {
        std::map<std::string, FillProperties> fills;
        std::map<std::string, LineProperties> lines;
+        std::map<std::string, PointProperties> points;
    } computed;
 };

--- a/include/llmr/util/animation.hpp
+++ b/include/llmr/util/animation.hpp
@@ -2,6 +2,7 @@
 #define LLMR_UTIL_ANIMATION

 #include <llmr/util/noncopyable.hpp>
+#include <llmr/platform/platform.hpp>

 namespace llmr {
 namespace util {
@@ -12,14 +13,51 @@ public:
        running,
        complete
    };
+    animation(double duration)
+        : start(platform::time()),
+          duration(duration) {}

-    animation(double from, double to, double &value, double duration);
+    double progress() const {
+        return (platform::time() - start) / duration;
+    }
+
+    virtual state update() const = 0;
+    virtual ~animation();
+
+protected:
+    const double start, duration;
+};
+
+class ease_animation : public animation {
+public:
+    ease_animation(double from, double to, double& value, double duration);
    state update() const;

 private:
-    const double start, duration;
    const double from, to;
-    double &value;
+    double& value;
+};
+
+template <typename T>
+class timeout : public animation {
+public:
+    timeout(T final_value, T& value, double duration)
+        : animation(duration),
+          final_value(final_value),
+          value(value) {}
+
+    state update() const {
+        if (progress() >= 1) {
+            value = final_value;
+            return complete;
+        } else {
+            return running;
+        }
+    }
+
+private:
+    const T final_value;
+    T& value;
 };

 }
--- a/ios/MBXViewController.mm
+++ b/ios/MBXViewController.mm
@@ -49,7 +49,7 @@ class MBXMapView
        {
            settings.load();

-            map.setup();
+            map.setup([[UIScreen mainScreen] scale]);

            CGRect frame = [[UIScreen mainScreen] bounds];
            map.resize(frame.size.width, frame.size.height, frame.size.width, frame.size.height);
@@ -141,6 +141,8 @@ class MBXMapView

 - (void)dealloc
 {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+
    mapView->settings.sync();
 }

@@ -236,6 +238,8 @@ class MBXMapView

    if (pinch.state == UIGestureRecognizerStateBegan)
    {
+        mapView->map.startScaling();
+
        self.scale = mapView->map.getScale();
    }
    else if (pinch.state == UIGestureRecognizerStateChanged)
@@ -258,6 +262,8 @@ class MBXMapView
    }
    else if (pinch.state == UIGestureRecognizerStateEnded)
    {
+        mapView->map.stopScaling();
+
        if (fabsf(pinch.velocity) < 20)
            return;

@@ -270,6 +276,10 @@ class MBXMapView

        mapView->map.scaleBy(new_scale / scale, [pinch locationInView:pinch.view].x, [pinch locationInView:pinch.view].y, duration);
    }
+    else if (pinch.state == UIGestureRecognizerStateCancelled)
+    {
+        mapView->map.stopScaling();
+    }

    [self updateRender];
 }
@@ -280,12 +290,18 @@ class MBXMapView

    if (rotate.state == UIGestureRecognizerStateBegan)
    {
+        mapView->map.startRotating();
+
        self.angle = mapView->map.getAngle();
    }
    else if (rotate.state == UIGestureRecognizerStateChanged)
    {
        mapView->map.setAngle(self.angle + rotate.rotation, [rotate locationInView:rotate.view].x, [rotate locationInView:rotate.view].y);
    }
+    else if (rotate.state == UIGestureRecognizerStateEnded || rotate.state == UIGestureRecognizerStateCancelled)
+    {
+        mapView->map.stopRotating();
+    }

    [self updateRender];
 }
@@ -373,27 +389,27 @@ class MBXMapView
    return ([validSimultaneousGestures containsObject:[gestureRecognizer class]] && [validSimultaneousGestures containsObject:[otherGestureRecognizer class]]);
 }

-CADisplayLink *displayLink;
 MBXMapView *mapView;
-NSOperationQueue *queue = NULL;
+CADisplayLink *displayLink;
+NSOperationQueue *queue;

 namespace llmr
 {
    namespace platform
    {
-        void restart(void *)
+        void restart()
        {
+            [[NSNotificationCenter defaultCenter] postNotificationName:MBXNeedsRenderNotification object:nil];
        }

-        void request_http(std::string url, std::function<void(Response&)> func, std::function<void()> cb)
+        void request_http(std::string url, std::function<void(Response&)> background_function, std::function<void()> foreground_callback)
        {
            [[NSNotificationCenter defaultCenter] postNotificationName:MBXUpdateActivityNotification object:nil userInfo:[NSDictionary dictionaryWithObject:@1 forKey:@"count"]];

-            if (!queue) {
-                queue = [[NSOperationQueue alloc] init];
-            }
+            if (!queue)
+                queue = [NSOperationQueue new];

-            NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithUTF8String:url.c_str()]]];
+            NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@(url.c_str())]];

            [NSURLConnection sendAsynchronousRequest:urlRequest
                                               queue:queue
@@ -407,10 +423,11 @@ namespace llmr
                    res.body = { (const char *)[data bytes], [data length] };
                }

-                func(res);
+                background_function(res);

-                dispatch_async(dispatch_get_main_queue(), ^(void) {
-                   cb();
+                dispatch_async(dispatch_get_main_queue(), ^(void)
+                {
+                   foreground_callback();
                });

                [[NSNotificationCenter defaultCenter] postNotificationName:MBXUpdateActivityNotification object:nil userInfo:[NSDictionary dictionaryWithObject:@(-1) forKey:@"count"]];
--- a/macosx/main.mm
+++ b/macosx/main.mm
@@ -5,9 +5,9 @@
 #include <llmr/platform/platform.hpp>
 #include "settings.hpp"

-#include <thread>
+#include <cstdio>

-NSString *const MBXNeedsRenderNotification = @"MBXNeedsRenderNotification";
+#include <thread>

 class MapView {
 public:
@@ -39,8 +39,14 @@ public:
        glfwSetWindowUserPointer(window, this);
        glfwMakeContextCurrent(window);

+
+        int width, height;
+        glfwGetWindowSize(window, &width, &height);
+        int fb_width, fb_height;
+        glfwGetFramebufferSize(window, &fb_width, &fb_height);
+
        settings.load();
-        map.setup();
+        map.setup((double)fb_width / width);

        resize(window, 0, 0);

@@ -55,15 +61,9 @@ public:
        glfwSetScrollCallback(window, scroll);
        glfwSetCharCallback(window, character);
        glfwSetKeyCallback(window, key);
-
-        [[NSNotificationCenter defaultCenter] addObserverForName:MBXNeedsRenderNotification
-         object:nil
-         queue:[NSOperationQueue mainQueue]
-        usingBlock: ^ (NSNotification * notification) {
-            dirty = true;
-        }];
    }

+
    static void character(GLFWwindow *window, unsigned int codepoint) {

    }
@@ -110,6 +110,7 @@ public:
            scale = 1.0 / scale;
        }

+        mapView->map.startScaling();
        mapView->map.scaleBy(scale, mapView->last_x, mapView->last_y);
    }

@@ -132,11 +133,14 @@ public:
            if (mapView->rotating) {
                mapView->start_x = mapView->last_x;
                mapView->start_y = mapView->last_y;
+            } else {
+                mapView->map.stopRotating();
            }
        } else if (button == GLFW_MOUSE_BUTTON_LEFT) {
            mapView->tracking = action == GLFW_PRESS;

            if (action == GLFW_RELEASE) {
+                mapView->map.stopPanning();
                double now = glfwGetTime();
                if (now - mapView->last_click < 0.4) {
                    mapView->map.scaleBy(2.0, mapView->last_x, mapView->last_y);
@@ -149,8 +153,14 @@ public:
    static void mousemove(GLFWwindow *window, double x, double y) {
        MapView *mapView = (MapView *)glfwGetWindowUserPointer(window);
        if (mapView->tracking) {
-            mapView->map.moveBy(x - mapView->last_x, y - mapView->last_y);
+            double dx = x - mapView->last_x;
+            double dy = y - mapView->last_y;
+            if (dx || dy) {
+                mapView->map.startPanning();
+                mapView->map.moveBy(dx, dy);
+            }
        } else if (mapView->rotating) {
+            mapView->map.startRotating();
            mapView->map.rotateBy(mapView->start_x, mapView->start_y, mapView->last_x, mapView->last_y, x, y);
        }
        mapView->last_x = x;
@@ -217,24 +227,26 @@ public:
 };

 MapView *mapView;
-NSOperationQueue *queue = NULL;
+NSOperationQueue *queue;

 namespace llmr {
 namespace platform {

-void restart(void *) {
+void restart() {
    mapView->dirty = true;
+    CGEventRef event = CGEventCreate(NULL);
+    CGEventSetType(event, kCGEventMouseMoved);
+    [[NSApplication sharedApplication] postEvent: [NSEvent eventWithCGEvent:event] atStart:NO];
 }

-void request_http(std::string url, std::function<void(Response&)> func, std::function<void()> cb) {
+void request_http(std::string url, std::function<void(Response&)> background_function, std::function<void()> foreground_callback) {
    if (!queue) {
-        queue = [[NSOperationQueue alloc] init];
+        queue = [NSOperationQueue new];
    }

    NSMutableURLRequest *urlRequest = [NSMutableURLRequest
                                       requestWithURL:[NSURL
-                                               URLWithString:[NSString
-                                                       stringWithUTF8String:url.c_str()]]];
+                                               URLWithString:@(url.c_str())]];

    [NSURLConnection
     sendAsynchronousRequest:urlRequest
@@ -247,11 +259,10 @@ void request_http(std::string url, std::function<void(Response&)> func, std::fun
            res.body = { (const char *)[data bytes], [data length] };
        }

-        func(res);
+        background_function(res);
        dispatch_async(dispatch_get_main_queue(), ^(void) {
-            cb();
+            foreground_callback();
        });
-        [[NSNotificationCenter defaultCenter] postNotificationName:MBXNeedsRenderNotification object:nil];
    }];
 }

--- a/resources/style.pbf
+++ b/resources/style.pbf
--- a/src/geometry/point_buffer.cpp
+++ b/src/geometry/point_buffer.cpp
@@ -0,0 +1,12 @@
+#include <llmr/geometry/point_buffer.hpp>
+#include <llmr/platform/gl.hpp>
+
+#include <cmath>
+
+using namespace llmr;
+
+void PointVertexBuffer::add(vertex_type x, vertex_type y) {
+    vertex_type *vertices = static_cast<vertex_type *>(addElement());
+    vertices[0] = x;
+    vertices[1] = y;
+}
--- a/src/map/map.cpp
+++ b/src/map/map.cpp
@@ -15,19 +15,20 @@ Map::Map(Settings& settings)
      painter(transform, settings, style),
      min_zoom(0),
      max_zoom(14) {
-
-    // TODO: Extract that information from the stylesheet instead of hard coding
-    style.sprite = std::make_shared<Sprite>();
-    style.sprite->load(kSpriteURL);
 }

 Map::~Map() {
    settings.sync();
 }

-void Map::setup() {
+void Map::setup(float pixelRatio) {
    painter.setup();

+    pixel_ratio = pixelRatio;
+
+    style.sprite = std::make_shared<Sprite>();
+    style.sprite->load(kSpriteURL, pixel_ratio);
+
    style.load(resources::style, resources::style_size);
    // style.loadJSON((const char *)resources::style, resources::style_size);
 }
@@ -54,7 +55,7 @@ void Map::resize(uint32_t width, uint32_t height, uint32_t fb_width, uint32_t fb
    transform.height = height;
    transform.fb_width = fb_width;
    transform.fb_height = fb_height;
-    transform.pixelRatio = (double)fb_width / (double)width;
+    transform.pixelRatio = pixel_ratio;
    update();
 }

@@ -66,6 +67,16 @@ void Map::moveBy(double dx, double dy, double duration) {
    settings.persist();
 }

+void Map::startPanning() {
+    transform.startPanning();
+    platform::restart();
+}
+
+void Map::stopPanning() {
+    transform.stopPanning();
+    platform::restart();
+}
+
 void Map::scaleBy(double ds, double cx, double cy, double duration) {
    transform.scaleBy(ds, cx, cy, duration);
    style.cascade(transform.getZoom());
@@ -76,6 +87,16 @@ void Map::scaleBy(double ds, double cx, double cy, double duration) {
    settings.persist();
 }

+void Map::startScaling() {
+    transform.startScaling();
+    platform::restart();
+}
+
+void Map::stopScaling() {
+    transform.stopScaling();
+    platform::restart();
+}
+
 void Map::rotateBy(double cx, double cy, double sx, double sy, double ex, double ey, double duration) {
    transform.rotateBy(cx, cy, sx, sy, ex, ey, duration);
    update();
@@ -84,6 +105,16 @@ void Map::rotateBy(double cx, double cy, double sx, double sy, double ex, double
    settings.persist();
 }

+void Map::startRotating() {
+    transform.startRotating();
+    platform::restart();
+}
+
+void Map::stopRotating() {
+    transform.stopRotating();
+    platform::restart();
+}
+
 void Map::setLonLat(double lon, double lat, double duration) {
    transform.setLonLat(lon, lat, duration);
    update();
@@ -92,7 +123,7 @@ void Map::setLonLat(double lon, double lat, double duration) {
    settings.persist();
 }

-void Map::getLonLat(double &lon, double &lat) const {
+void Map::getLonLat(double& lon, double& lat) const {
    transform.getLonLat(lon, lat);
 }

@@ -106,7 +137,7 @@ void Map::setLonLatZoom(double lon, double lat, double zoom, double duration) {
    settings.persist();
 }

-void Map::getLonLatZoom(double &lon, double &lat, double &zoom) const {
+void Map::getLonLatZoom(double& lon, double& lat, double& zoom) const {
    transform.getLonLatZoom(lon, lat, zoom);
 }

@@ -202,7 +233,7 @@ void Map::cancelAnimations() {

 void Map::update() {
    updateTiles();
-    platform::restart(this);
+    platform::restart();
 }


@@ -375,12 +406,12 @@ bool Map::updateTiles() {
 }

 bool Map::render() {
-    bool changed = false;
    if (transform.needsAnimation()) {
        transform.updateAnimations();
-        changed = updateTiles();
    }

+    bool changed = updateTiles();
+
    painter.clear();

    for (Tile::Ptr& tile : tiles) {
@@ -395,14 +426,3 @@ bool Map::render() {

    return changed || transform.needsAnimation();
 }
-
-void Map::tileLoaded(Tile::Ptr tile) {
-    // std::cerr << "loaded " << tile->toString() << std::endl;
-    update();
-}
-
-void Map::tileFailed(Tile::Ptr tile) {
-    // fprintf(stderr, "[%8zx] tile failed to load %d/%d/%d\n",
-    //         std::hash<std::thread::id>()(std::this_thread::get_id()),
-    //         tile->z, tile->x, tile->y);
-}
--- a/src/map/tile.cpp
+++ b/src/map/tile.cpp
@@ -4,9 +4,11 @@
 #include <llmr/map/vector_tile.hpp>
 #include <llmr/geometry/fill_buffer.hpp>
 #include <llmr/geometry/line_buffer.hpp>
+#include <llmr/geometry/point_buffer.hpp>
 #include <llmr/geometry/elements_buffer.hpp>
 #include <llmr/renderer/fill_bucket.hpp>
 #include <llmr/renderer/line_bucket.hpp>
+#include <llmr/renderer/point_bucket.hpp>
 #include <llmr/platform/platform.hpp>
 #include <llmr/util/pbf.hpp>
 #include <llmr/util/string.hpp>
@@ -45,6 +47,7 @@ Tile::Tile(ID id, const Style& style)
      state(initial),
      fillVertexBuffer(std::make_shared<FillVertexBuffer>()),
      lineVertexBuffer(std::make_shared<LineVertexBuffer>()),
+      pointVertexBuffer(std::make_shared<PointVertexBuffer>()),
      triangleElementsBuffer(std::make_shared<TriangleElementsBuffer>()),
      lineElementsBuffer(std::make_shared<LineElementsBuffer>()),
      pointElementsBuffer(std::make_shared<PointElementsBuffer>()),
@@ -80,8 +83,7 @@ void Tile::request() {
            fprintf(stderr, "tile loading failed\n");
        }
    }, []() {
-        // TODO: Make sure this gets passed the correct map ID/pointer.
-        platform::restart(nullptr);
+        platform::restart();
    });
 }

@@ -159,6 +161,8 @@ std::shared_ptr<Bucket> Tile::createBucket(const VectorTile& tile, const BucketD
            return createFillBucket(layer, bucket_desc);
        } else if (bucket_desc.type == BucketType::Line) {
            return createLineBucket(layer, bucket_desc);
+        } else if (bucket_desc.type == BucketType::Point) {
+            return createPointBucket(layer, bucket_desc);
        } else {
            // TODO: create other bucket types.
        }
@@ -200,3 +204,19 @@ std::shared_ptr<Bucket> Tile::createLineBucket(const VectorTileLayer& layer, con

    return bucket;
 }
+
+std::shared_ptr<Bucket> Tile::createPointBucket(const VectorTileLayer& layer, const BucketDescription& bucket_desc) {
+    std::shared_ptr<PointBucket> bucket = std::make_shared<PointBucket>(pointVertexBuffer, bucket_desc);
+
+    FilteredVectorTileLayer filtered_layer(layer, bucket_desc);
+    for (pbf feature : filtered_layer) {
+        while (feature.next(4)) { // geometry
+            pbf geometry_pbf = feature.message();
+            if (geometry_pbf) {
+                bucket->addGeometry(geometry_pbf);
+            }
+        }
+    }
+
+    return bucket;
+}
--- a/src/map/transform.cpp
+++ b/src/map/transform.cpp
@@ -1,6 +1,7 @@
 #include <llmr/map/transform.hpp>
 #include <llmr/util/constants.hpp>
 #include <llmr/util/mat4.hpp>
+#include <llmr/util/std.hpp>
 #include <llmr/util/math.hpp>
 #include <cstdio>

@@ -24,8 +25,8 @@ bool Transform::needsAnimation() const {
 }

 void Transform::updateAnimations() {
-    animations.remove_if([](const util::animation& animation) {
-        return animation.update() == util::animation::complete;
+    animations.remove_if([](const std::shared_ptr<util::animation>& animation) {
+        return animation->update() == util::animation::complete;
    });
 }

@@ -40,8 +41,25 @@ void Transform::moveBy(double dx, double dy, double duration) {
        x = xn;
        y = yn;
    } else {
-        animations.emplace_front(x, xn, x, duration);
-        animations.emplace_front(y, yn, y, duration);
+        animations.emplace_front(std::make_shared<util::ease_animation>(x, xn, x, duration));
+        animations.emplace_front(std::make_shared<util::ease_animation>(y, yn, y, duration));
+    }
+}
+
+void Transform::startPanning() {
+    stopPanning();
+
+    // Add a 200ms timeout for resetting this to false
+    panning = true;
+    pan_timeout = std::make_shared<util::timeout<bool>>(false, panning, 0.2);
+    animations.emplace_front(pan_timeout);
+}
+
+void Transform::stopPanning() {
+    panning = false;
+    if (pan_timeout) {
+        animations.remove(pan_timeout);
+        pan_timeout.reset();
    }
 }

@@ -59,6 +77,22 @@ void Transform::scaleBy(double ds, double cx, double cy, double duration) {
    setScale(new_scale, cx, cy, duration);
 }

+void Transform::startScaling() {
+    stopScaling();
+
+    // Add a 200ms timeout for resetting this to false
+    scaling = true;
+    scale_timeout = std::make_shared<util::timeout<bool>>(false, scaling, 0.2);
+    animations.emplace_front(scale_timeout);
+}
+
+void Transform::stopScaling() {
+    scaling = false;
+    if (scale_timeout) {
+        animations.remove(scale_timeout);
+        scale_timeout.reset();
+    }
+}

 void Transform::rotateBy(double anchor_x, double anchor_y, double start_x, double start_y, double end_x, double end_y, double duration) {
    double center_x = width / 2, center_y = height / 2;
@@ -94,7 +128,24 @@ void Transform::setAngle(double new_angle, double duration) {
    if (duration == 0) {
        angle = new_angle;
    } else {
-        animations.emplace_front(angle, new_angle, angle, duration);
+        animations.emplace_front(std::make_shared<util::ease_animation>(angle, new_angle, angle, duration));
+    }
+}
+
+void Transform::startRotating() {
+    stopRotating();
+
+    // Add a 200ms timeout for resetting this to false
+    rotating = true;
+    rotate_timeout = std::make_shared<util::timeout<bool>>(false, rotating, 0.2);
+    animations.emplace_front(rotate_timeout);
+}
+
+void Transform::stopRotating() {
+    rotating = false;
+    if (rotate_timeout) {
+        animations.remove(rotate_timeout);
+        rotate_timeout.reset();
    }
 }

@@ -104,9 +155,9 @@ void Transform::setScaleXY(double new_scale, double xn, double yn, double durati
        x = xn;
        y = yn;
    } else {
-        animations.emplace_front(scale, new_scale, scale, duration);
-        animations.emplace_front(x, xn, x, duration);
-        animations.emplace_front(y, yn, y, duration);
+        animations.emplace_front(std::make_shared<util::ease_animation>(scale, new_scale, scale, duration));
+        animations.emplace_front(std::make_shared<util::ease_animation>(x, xn, x, duration));
+        animations.emplace_front(std::make_shared<util::ease_animation>(y, yn, y, duration));
    }

    const double s = scale * util::tileSize;
--- a/src/renderer/painter.cpp
+++ b/src/renderer/painter.cpp
@@ -7,6 +7,7 @@

 #include <llmr/renderer/fill_bucket.hpp>
 #include <llmr/renderer/line_bucket.hpp>
+#include <llmr/renderer/point_bucket.hpp>

 #include <llmr/map/transform.hpp>
 #include <llmr/map/settings.hpp>
@@ -29,6 +30,7 @@ Painter::Painter(Transform& transform, Settings& settings, Style& style)
 void Painter::setup() {
    setupShaders();

+    assert(pointShader);
    assert(plainShader);
    assert(outlineShader);
    assert(lineShader);
@@ -52,6 +54,7 @@ void Painter::setupShaders() {
    lineShader = std::make_unique<LineShader>();
    linejoinShader = std::make_unique<LinejoinShader>();
    patternShader = std::make_unique<PatternShader>();
+    pointShader = std::make_unique<PointShader>();
 }

 void Painter::useProgram(uint32_t program) {
@@ -377,6 +380,44 @@ void Painter::renderLine(LineBucket& bucket, const std::string& layer_name, cons
    }
 }

+void Painter::renderPoint(PointBucket& bucket, const std::string& layer_name, const Tile::ID& id) {
+    const PointProperties& properties = style.computed.points[layer_name];
+
+    // Abort early.
+    if (!bucket.hasPoints()) return;
+    if (properties.hidden) return;
+
+    Color color = properties.color;
+    color[0] *= properties.opacity;
+    color[1] *= properties.opacity;
+    color[2] *= properties.opacity;
+    color[3] *= properties.opacity;
+
+    std::string sized_image = properties.image;
+    sized_image.append("-");
+    sized_image.append(std::to_string(static_cast<int>(std::round(properties.size))));
+
+    ImagePosition imagePos = style.sprite->getPosition(sized_image, false);
+
+    // fprintf(stderr, "%f/%f => %f/%f\n", imagePos.tl.x, imagePos.tl.y, imagePos.br.x, imagePos.br.y);
+
+    useProgram(pointShader->program);
+    pointShader->setMatrix(matrix);
+    pointShader->setImage(0);
+    pointShader->setColor(color);
+    const float pointSize = properties.size * 1.4142135623730951;
+    #if defined(GL_ES_VERSION_2_0)
+        pointShader->setSize(pointSize);
+    #else
+        glPointSize(pointSize);
+        glEnable(GL_POINT_SPRITE);
+    #endif
+    pointShader->setPointTopLeft({{ imagePos.tl.x, imagePos.tl.y }});
+    pointShader->setPointBottomRight({{ imagePos.br.x, imagePos.br.y }});
+    style.sprite->bind(transform.rotating || transform.scaling || transform.panning);
+    bucket.drawPoints(*pointShader);
+}
+
 void Painter::renderDebug(const Tile::Ptr& tile) {
    // Blend to the front, not the back.
    glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
--- a/src/renderer/point_bucket.cpp
+++ b/src/renderer/point_bucket.cpp
@@ -0,0 +1,52 @@
+#include <llmr/renderer/point_bucket.hpp>
+#include <llmr/geometry/point_buffer.hpp>
+#include <llmr/geometry/elements_buffer.hpp>
+#include <llmr/geometry/geometry.hpp>
+
+#include <llmr/renderer/painter.hpp>
+#include <llmr/style/style.hpp>
+#include <llmr/map/vector_tile.hpp>
+
+#include <llmr/platform/gl.hpp>
+
+#include <cassert>
+
+struct geometry_too_long_exception : std::exception {};
+
+using namespace llmr;
+
+PointBucket::PointBucket(const std::shared_ptr<PointVertexBuffer>& vertexBuffer,
+                         const BucketDescription& bucket_desc)
+    : geometry(bucket_desc.geometry),
+      vertexBuffer(vertexBuffer),
+      vertex_start(vertexBuffer->index()) {
+}
+
+void PointBucket::addGeometry(pbf& geom) {
+    Geometry::command cmd;
+    Geometry geometry(geom);
+    int32_t x, y;
+    while ((cmd = geometry.next(x, y)) != Geometry::end) {
+        if (cmd == Geometry::move_to) {
+            vertexBuffer->add(x, y);
+        } else {
+            fprintf(stderr, "other command than move_to in point geometry\n");
+        }
+    }
+
+    vertex_end = vertexBuffer->index();
+}
+
+void PointBucket::render(Painter& painter, const std::string& layer_name, const Tile::ID& id) {
+    painter.renderPoint(*this, layer_name, id);
+}
+
+bool PointBucket::hasPoints() const {
+    return vertex_end > 0;
+}
+
+void PointBucket::drawPoints(PointShader& shader) {
+    char *vertex_index = BUFFER_OFFSET(vertex_start * vertexBuffer->itemSize);
+    array.bind(shader, *vertexBuffer, vertex_index);
+    glDrawArrays(GL_POINTS, 0, vertex_end - vertex_start);
+}
--- a/src/renderer/shader-point.cpp
+++ b/src/renderer/shader-point.cpp
@@ -0,0 +1,74 @@
+#include <llmr/renderer/shader-point.hpp>
+#include <llmr/shader/shaders.hpp>
+#include <llmr/platform/gl.hpp>
+
+#include <cstdio>
+
+using namespace llmr;
+
+PointShader::PointShader()
+    : Shader(
+         shaders[POINT_SHADER].vertex,
+         shaders[POINT_SHADER].fragment
+         ) {
+    if (!valid) {
+        fprintf(stderr, "invalid point shader\n");
+        return;
+    }
+
+    a_pos = glGetAttribLocation(program, "a_pos");
+
+    u_matrix = glGetUniformLocation(program, "u_matrix");
+    u_color = glGetUniformLocation(program, "u_color");
+    u_size = glGetUniformLocation(program, "u_size");
+    u_point_tl = glGetUniformLocation(program, "u_tl");
+    u_point_br = glGetUniformLocation(program, "u_br");
+
+    // fprintf(stderr, "PointShader:\n");
+    // fprintf(stderr, "    - u_matrix: %d\n", u_matrix);
+    // fprintf(stderr, "    - u_color: %d\n", u_color);
+    // fprintf(stderr, "    - u_size: %d\n", u_size);
+    // fprintf(stderr, "    - u_point_tl: %d\n", u_point_tl);
+    // fprintf(stderr, "    - u_point_br: %d\n", u_point_br);
+    // fprintf(stderr, "    - u_image: %d\n", u_image);
+}
+
+void PointShader::bind(char *offset) {
+    glEnableVertexAttribArray(a_pos);
+    glVertexAttribPointer(a_pos, 2, GL_SHORT, false, 0, offset);
+}
+
+void PointShader::setImage(int32_t new_image) {
+    if (image != new_image) {
+        glUniform1i(u_image, new_image);
+        image = new_image;
+    }
+}
+
+void PointShader::setColor(const std::array<float, 4>& new_color) {
+    if (color != new_color) {
+        glUniform4fv(u_color, 1, new_color.data());
+        color = new_color;
+    }
+}
+
+void PointShader::setSize(float new_size) {
+    if (size != new_size) {
+        glUniform1f(u_size, new_size);
+        size = new_size;
+    }
+}
+
+void PointShader::setPointTopLeft(const std::array<float, 2>& new_point_tl) {
+    if (point_tl != new_point_tl) {
+        glUniform2fv(u_point_tl, 1, new_point_tl.data());
+        point_tl = new_point_tl;
+    }
+}
+
+void PointShader::setPointBottomRight(const std::array<float, 2>& new_point_br) {
+    if (point_br != new_point_br) {
+        glUniform2fv(u_point_br, 1, new_point_br.data());
+        point_br = new_point_br;
+    }
+}
--- a/src/shader/point.fragment.glsl
+++ b/src/shader/point.fragment.glsl
@@ -0,0 +1,21 @@
+#define root2 1.4142135623730951
+
+uniform sampler2D u_image;
+uniform vec2 u_tl;
+uniform vec2 u_br;
+uniform vec4 u_color;
+
+uniform vec2 pos;
+uniform float inbounds;
+uniform vec4 color;
+
+void main() {
+    vec2 pos = (gl_PointCoord * 2.0 - 1.0) * root2 / 2.0 + 0.5;
+
+    float inbounds = step(0.0, pos.x) * step(0.0, pos.y) *
+        (1.0 - step(1.0, pos.x)) * (1.0 - step(1.0, pos.y));
+
+    vec4 color = texture2D(u_image, mix(u_tl, u_br, pos)) * inbounds;
+
+    gl_FragColor = color;
+}
--- a/src/shader/point.vertex.glsl
+++ b/src/shader/point.vertex.glsl
@@ -0,0 +1,9 @@
+attribute vec2 a_pos;
+
+uniform mat4 u_matrix;
+uniform float u_size;
+
+void main() {
+    gl_Position = u_matrix * vec4(a_pos, 0, 1);
+    gl_PointSize = u_size;
+}
--- a/src/shader/shaders.cpp
+++ b/src/shader/shaders.cpp
@@ -23,5 +23,9 @@ const shader_source llmr::shaders[SHADER_COUNT] = {
   {
       "attribute vec2 a_pos;\n\nuniform mat4 u_matrix;\n\nvoid main() {\n    gl_Position = u_matrix * vec4(a_pos, 0, 1);\n}\n",
       "uniform vec4 u_color;\n\nvoid main() {\n    gl_FragColor = u_color;\n}\n",
+   },
+   {
+       "attribute vec2 a_pos;\n\nuniform mat4 u_matrix;\nuniform float u_size;\n\nvoid main() {\n    gl_Position = u_matrix * vec4(a_pos, 0, 1);\n    gl_PointSize = u_size;\n}\n",
+       "#define root2 1.4142135623730951\n\nuniform sampler2D u_image;\nuniform vec2 u_tl;\nuniform vec2 u_br;\nuniform vec4 u_color;\n\nuniform vec2 pos;\nuniform float inbounds;\nuniform vec4 color;\n\nvoid main() {\n    vec2 pos = (gl_PointCoord * 2.0 - 1.0) * root2 / 2.0 + 0.5;\n\n    float inbounds = step(0.0, pos.x) * step(0.0, pos.y) *\n        (1.0 - step(1.0, pos.x)) * (1.0 - step(1.0, pos.y));\n\n    vec4 color = texture2D(u_image, mix(u_tl, u_br, pos)) * inbounds;\n\n    gl_FragColor = color;\n}\n",
   }
 };
--- a/src/style/resources.cpp
+++ b/src/style/resources.cpp
@@ -47,7 +47,7 @@ const unsigned char resources::style[] = {
    12, 114, 111, 97, 100, 95, 114, 101, 103, 117, 108, 97, 114, 18, 24, 10,
    10, 114, 111, 97, 100, 95, 108, 97, 114, 103, 101, 18, 10, 114, 111, 97,
    100, 95, 108, 97, 114, 103, 101, 18, 18, 10, 7, 97, 108, 99, 111, 104,
-    111, 108, 18, 7, 97, 108, 99, 111, 104, 111, 108, 26, 220, 2, 10, 7,
+    111, 108, 18, 7, 97, 108, 99, 111, 104, 111, 108, 26, 132, 3, 10, 7,
    100, 101, 102, 97, 117, 108, 116, 18, 27, 10, 4, 112, 97, 114, 107, 34,
    8, 8, 2, 18, 4, 0, 0, 128, 63, 45, 255, 159, 223, 200, 66, 4,
    112, 97, 114, 107, 18, 31, 10, 4, 119, 111, 111, 100, 34, 8, 8, 2,
@@ -69,6 +69,9 @@ const unsigned char resources::style[] = {
    255, 102, 102, 102, 34, 52, 8, 3, 18, 48, 0, 0, 0, 0, 0, 0,
    0, 63, 0, 0, 48, 65, 0, 0, 0, 63, 0, 0, 80, 65, 0, 0,
    128, 63, 0, 0, 128, 65, 0, 0, 128, 64, 0, 0, 160, 65, 0, 0,
-    128, 66, 0, 0, 240, 65, 0, 0, 128, 66
+    128, 66, 0, 0, 240, 65, 0, 0, 128, 66, 34, 38, 10, 7, 97, 108,
+    99, 111, 104, 111, 108, 29, 255, 153, 153, 153, 34, 8, 8, 2, 18, 4,
+    0, 0, 192, 65, 66, 12, 97, 108, 99, 111, 104, 111, 108, 45, 115, 104,
+    111, 112
 };
 const unsigned long resources::style_size = sizeof(resources::style);
--- a/src/style/sprite.cpp
+++ b/src/style/sprite.cpp
@@ -34,19 +34,21 @@ Sprite::operator bool() const {
    return loaded;
 }

-void Sprite::load(const std::string& base_url) {
+void Sprite::load(const std::string& base_url, float pixelRatio) {
    std::shared_ptr<Sprite> sprite = shared_from_this();

    auto complete = [sprite]() {
        std::lock_guard<std::mutex> lock(sprite->mtx);
        if (sprite->img && sprite->pos.size()) {
            sprite->loaded = true;
-            platform::restart(NULL);
+            platform::restart();
            fprintf(stderr, "sprite loaded\n");
        }
    };

-    platform::request_http(base_url + ".json", [sprite](const platform::Response & res) {
+    std::string suffix = (pixelRatio > 1 ? "@2x" : "");
+
+    platform::request_http(base_url + suffix + ".json", [sprite](const platform::Response & res) {
        if (res.code == 200) {
            sprite->parseJSON(res.body);
        } else {
@@ -54,7 +56,7 @@ void Sprite::load(const std::string& base_url) {
        }
    }, complete);

-    platform::request_http(base_url + ".png", [sprite](const platform::Response & res) {
+    platform::request_http(base_url + suffix + ".png", [sprite](const platform::Response & res) {
        if (res.code == 200) {
            sprite->loadImage(res.body);
        } else {
@@ -242,11 +244,13 @@ void Sprite::bind(bool linear) {

    if (!texture) {
        glGenTextures(1, &texture);
+        glActiveTexture(GL_TEXTURE0);
        glBindTexture(GL_TEXTURE_2D, texture);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, img);
    } else {
+        glActiveTexture(GL_TEXTURE0);
        glBindTexture(GL_TEXTURE_2D, texture);
    }

--- a/src/style/style.cpp
+++ b/src/style/style.cpp
@@ -12,6 +12,7 @@ Style::Style() {
 void Style::reset() {
    computed.fills.clear();
    computed.lines.clear();
+    computed.points.clear();
 }

 void Style::load(const uint8_t *const data, uint32_t bytes) {
@@ -89,10 +90,12 @@ std::pair<std::string, ClassDescription> Style::parseClass(pbf data) {
    while (data.next()) {
        if (data.tag == 1) { // name
            name = data.string();
-        } else if (data.tag == 2) { // fill_style
+        } else if (data.tag == 2) { // fill style
            klass.fill.insert(parseFillClass(data.message()));
-        } else if (data.tag == 3) { // stroke_style
+        } else if (data.tag == 3) { // line style
            klass.line.insert(parseLineClass(data.message()));
+        } else if (data.tag == 4) { // point style
+            klass.point.insert(parsePointClass(data.message()));
        } else {
            data.skip();
        }
@@ -159,6 +162,30 @@ std::pair<std::string, LineClass> Style::parseLineClass(pbf data) {
    return { name, stroke };
 }

+std::pair<std::string, PointClass> Style::parsePointClass(pbf data) {
+    PointClass point;
+    std::string name;
+
+    while (data.next()) {
+        if (data.tag == 1) { // name
+            name = data.string();
+        } else if (data.tag == 2) { // hidden
+            point.hidden = parseProperty<bool>(data.message());
+        } else if (data.tag == 3) { // color
+            point.color = parseColor(data);
+        } else if (data.tag == 4) { // size
+            point.size = parseProperty<float>(data.message());
+        } else if (data.tag == 6) { // opacity
+            point.opacity = parseProperty<float>(data.message());
+        } else if (data.tag == 8) { // image
+            point.image = data.string();
+        } else {
+            data.skip();
+        }
+    }
+
+    return { name, point };
+}

 Color Style::parseColor(pbf& data) {
    uint32_t rgba = data.fixed<uint32_t, 4>();
@@ -240,6 +267,21 @@ void Style::cascade(float z) {
            stroke.color = layer.color;
            stroke.opacity = layer.opacity(z);
        }
+
+        // Cascade point classes
+        for (const auto& point_pair : sheetClass.point) {
+            const std::string& layer_name = point_pair.first;
+            const llmr::PointClass& layer = point_pair.second;
+
+            // TODO: This should be restricted to point styles that have actual
+            // values so as to not override with default values.
+            llmr::PointProperties& point = computed.points[layer_name];
+            point.hidden = layer.hidden(z);
+            point.color = layer.color;
+            point.size = layer.size(z);
+            point.opacity = layer.opacity(z);
+            point.image = layer.image;
+        }
    }
 }

--- a/src/util/animation.cpp
+++ b/src/util/animation.cpp
@@ -6,16 +6,17 @@ using namespace llmr::util;

 UnitBezier ease(0.25, 0.1, 0.25, 1);

-animation::animation(double from, double to, double &value, double duration)
-    : start(platform::time()),
-      duration(duration),
+animation::~animation() {}
+
+ease_animation::ease_animation(double from, double to, double &value, double duration)
+    : animation(duration),
      from(from),
      to(to),
      value(value) {
 }

-animation::state animation::update() const {
-    double t = (platform::time() - start) / duration;
+animation::state ease_animation::update() const {
+    double t = progress();
    if (t >= 1) {
        value = to;
        return complete;