correctly update the map dimensions on rotate

refs #37

include/llmr/renderer/painter.hpp

@@ -43,7 +43,7 @@ public:
     void renderPoint(PointBucket& bucket, const std::string& layer_name, const Tile::ID& id);
     void renderText(TextBucket& bucket, const std::string& layer_name, const Tile::ID& id);
 
-    void resize(int width, int height);
+    void resize();
 
     void prepareClippingMask();
     void drawClippingMask(const mat4& matrix, uint8_t clip_id, bool opaque = true);

ios/MBXViewController.mm

@@ -162,6 +162,22 @@ class MBXMapView
     }
 }
 
+- (BOOL)shouldAutorotate {
+    return YES;
+}
+
+- (NSUInteger)supportedInterfaceOrientations {
+    return UIInterfaceOrientationMaskAll;
+}
+
+-(void)viewWillLayoutSubviews {
+    [super viewWillLayoutSubviews];
+
+    GLKView *view = (GLKView *)self.view;
+    CGRect rect = [view bounds];
+    mapView->map.resize(rect.size.width, rect.size.height, [view drawableWidth], [view drawableHeight]);
+}
+
 - (void)togglePalette
 {
     if (self.palette.alpha < 1)

src/map/map.cpp

@@ -46,9 +46,9 @@ void Map::loadSettings() {
 
 void Map::resize(uint16_t width, uint16_t height, uint16_t fb_width, uint16_t fb_height) {
     transform.resize(width, height, fb_width, fb_height);
-    painter.resize(fb_width, fb_height);
+    painter.resize();
 
-    if (!style.sprite || style.sprite->pixelRatio) {
+    if (!style.sprite || style.sprite->pixelRatio != transform.getPixelRatio()) {
         style.sprite = std::make_shared<Sprite>(transform.getPixelRatio());
         style.sprite->load(kSpriteURL);
     }

src/renderer/painter.cpp

@@ -74,8 +74,8 @@ void Painter::setupShaders() {
     textShader = std::make_unique<TextShader>();
 }
 
-void Painter::resize(int width, int height) {
-    glViewport(0, 0, width, height);
+void Painter::resize() {
+    glViewport(0, 0, transform.getFramebufferWidth(), transform.getFramebufferHeight());
 }
 
 void Painter::useProgram(uint32_t program) {