File	Doc	Category	Size	Date	Package
ColorFilterCache.java	API Doc	Android 5.1 API	2831	Thu Mar 12 22:22:56 GMT 2015	android.support.v17.leanback.graphics

ColorFilterCache

• java.lang.Object

Fields Summary
private static final android.util.SparseArray	sColorToFiltersMap
private final android.graphics.PorterDuffColorFilter[]	mFilters

Constructors Summary
private ColorFilterCache(int r, int g, int b) // Pre cache all 256 filter levels for (int i = 0x00; i <= 0xFF; i++) { int color = Color.argb(i, r, g, b); mFilters[i] = new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_ATOP); }

Methods Summary
public static android.support.v17.leanback.graphics.ColorFilterCache	getColorFilterCache(int color) Get a ColorDimmer for a given color. Only the RGB values are used; the alpha channel is ignored in color. Subsequent calls to this method with the same color value will return the same cache. param color The color to use for the color filters. return A cache of ColorFilters at different alpha levels for the color. final int r = Color.red(color); final int g = Color.green(color); final int b = Color.blue(color); color = Color.rgb(r, g, b); ColorFilterCache filters = sColorToFiltersMap.get(color); if (filters == null) { filters = new ColorFilterCache(r, g, b); sColorToFiltersMap.put(color, filters); } return filters;
public android.graphics.ColorFilter	getFilterForLevel(float level) Returns a ColorFilter for a given alpha level between 0 and 1.0. param level The alpha level the filter should apply. return A ColorFilter at the alpha level for the color represented by the cache. if (level >= 0 && level <= 1.0) { int filterIndex = (int) (0xFF * level); return mFilters[filterIndex]; } else { return null; }