diff options
author | Tobrun <tobrun.van.nuland@gmail.com> | 2017-11-01 16:46:09 -0700 |
---|---|---|
committer | Tobrun <tobrun@mapbox.com> | 2017-11-02 07:41:53 -0700 |
commit | 5dbd94016b9784f865e46d2bf46df240fc96fe7e (patch) | |
tree | 76025104d095209ecff9d18b348db7d4c0d4d3b1 | |
parent | 29a94ae939cf1d81017251ec374e3fff703dc4a6 (diff) | |
download | qtlocation-mapboxgl-5dbd94016b9784f865e46d2bf46df240fc96fe7e.tar.gz |
[android] - fix logo scale for MapSnapshot
-rw-r--r-- | platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/snapshotter/MapSnapshotter.java | 79 |
1 files changed, 52 insertions, 27 deletions
diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/snapshotter/MapSnapshotter.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/snapshotter/MapSnapshotter.java index 5206606c83..5deedc3e63 100644 --- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/snapshotter/MapSnapshotter.java +++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/snapshotter/MapSnapshotter.java @@ -4,6 +4,7 @@ import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; +import android.graphics.Matrix; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import android.support.annotation.UiThread; @@ -262,35 +263,59 @@ public class MapSnapshotter { nativeCancel(); } - protected void addOverlay(Bitmap original) { + /** + * Draw an overlay on the map snapshot. + * + * @param mapSnapshot the map snapshot to draw the overlay on + */ + protected void addOverlay(MapSnapshot mapSnapshot) { + Bitmap original = mapSnapshot.getBitmap(); + Canvas canvas = new Canvas(original); + addLogo(canvas, original); + } + + /** + * Draw a logo on the canvas created from the map snapshot. + * + * @param canvas the canvas to draw the bitmap on + * @param original the map snapshot image + */ + private void addLogo(Canvas canvas, Bitmap original) { DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics(); float margin = displayMetrics.density * LOGO_MARGIN_DP; - Canvas canvas = new Canvas(original); + Bitmap logo = createScaledLogo(original); + canvas.drawBitmap(logo, margin, original.getHeight() - logo.getHeight() - margin, null); + } + + /** + * Create a scaled logo for a map snapshot. + * + * @param snapshot the map snapshot where the logo should be placed on + * @return the scaled bitmap logo + */ + private Bitmap createScaledLogo(Bitmap snapshot) { + Bitmap logo = BitmapFactory.decodeResource(context.getResources(), R.drawable.mapbox_logo_icon, null); + float scale = calculateLogoScale(snapshot, logo); + Matrix matrix = new Matrix(); + matrix.postScale(scale, scale); + return Bitmap.createBitmap(logo, 0, 0, logo.getWidth(), logo.getHeight(), matrix, true); + } - // Decode just the boundaries - BitmapFactory.Options bitmapOptions = new BitmapFactory.Options(); - bitmapOptions.inJustDecodeBounds = true; - BitmapFactory.decodeResource(context.getResources(), R.drawable.mapbox_logo_icon, bitmapOptions); - int srcWidth = bitmapOptions.outWidth; - int srcHeight = bitmapOptions.outHeight; - - // Ratio, preferred dimensions and resulting sample size - float widthRatio = displayMetrics.widthPixels / original.getWidth(); - float heightRatio = displayMetrics.heightPixels / original.getHeight(); - float prefWidth = srcWidth / widthRatio; - float prefHeight = srcHeight / heightRatio; - int sampleSize = MapSnaphotUtil.calculateInSampleSize(bitmapOptions, (int) prefWidth, (int) prefHeight); - - // Scale bitmap - bitmapOptions.inJustDecodeBounds = false; - bitmapOptions.inScaled = true; - bitmapOptions.inSampleSize = sampleSize; - bitmapOptions.inDensity = srcWidth; - bitmapOptions.inTargetDensity = (int) prefWidth * bitmapOptions.inSampleSize; - Bitmap logo = BitmapFactory.decodeResource(context.getResources(), R.drawable.mapbox_logo_icon, bitmapOptions); - - float scaledHeight = bitmapOptions.outHeight * heightRatio / bitmapOptions.inSampleSize; - canvas.drawBitmap(logo, margin, original.getHeight() - scaledHeight - margin, null); + /** + * Calculates the scale of the logo, only allow downscaling. + * + * @param snapshot the bitmap of the map snapshot + * @param logo the bitmap of the mapbox logo + * @return the scale value + */ + private float calculateLogoScale(Bitmap snapshot, Bitmap logo) { + DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics(); + float widthRatio = displayMetrics.widthPixels / snapshot.getWidth(); + float heightRatio = displayMetrics.heightPixels / snapshot.getHeight(); + float prefWidth = logo.getWidth() / widthRatio; + float prefHeight = logo.getHeight() / heightRatio; + float calculatedScale = Math.min(prefWidth / logo.getWidth(), prefHeight / logo.getHeight()) * 2; + return calculatedScale < 1 ? calculatedScale : 1.0f; } /** @@ -302,7 +327,7 @@ public class MapSnapshotter { protected void onSnapshotReady(MapSnapshot snapshot) { if (callback != null) { if (snapshot.isShowLogo()) { - addOverlay(snapshot.getBitmap()); + addOverlay(snapshot); } callback.onSnapshotReady(snapshot); reset(); |