small sample for Levels Filter

vashisthg · vashisthg · commit e5e0785d1443 · 2014-12-08T14:21:57.000+05:30
diff --git a/sample/src/jp/co/cyberagent/android/gpuimage/sample/GPUImageFilterTools.java b/sample/src/jp/co/cyberagent/android/gpuimage/sample/GPUImageFilterTools.java
@@ -104,6 +104,8 @@ public static void showDialog(final Context context,
 
         filters.addFilter("Color Balance", FilterType.COLOR_BALANCE);
 
+        filters.addFilter("Levels Min (Mid Adjust)", FilterType.LEVELS_FILTER_MIN);
+
         AlertDialog.Builder builder = new AlertDialog.Builder(context);
         builder.setTitle("Choose a filter");
         builder.setItems(filters.names.toArray(new String[filters.names.size()]),
@@ -280,6 +282,10 @@ private static GPUImageFilter createFilterForType(final Context context, final F
                 return new GPUImageFalseColorFilter();
             case COLOR_BALANCE:
                 return new GPUImageColorBalanceFilter();
+            case LEVELS_FILTER_MIN:
+                GPUImageLevelsFilter levelsFilter = new GPUImageLevelsFilter();
+                levelsFilter.setMin(0.0f, 3.0f, 1.0f);
+                return levelsFilter;
 
             default:
                 throw new IllegalStateException("No filter of that type!");
@@ -308,7 +314,7 @@ private enum FilterType {
         BLEND_DISSOLVE, BLEND_EXCLUSION, BLEND_SOURCE_OVER, BLEND_HARD_LIGHT, BLEND_LIGHTEN, BLEND_ADD, BLEND_DIVIDE, BLEND_MULTIPLY, BLEND_OVERLAY, BLEND_SCREEN, BLEND_ALPHA,
         BLEND_COLOR, BLEND_HUE, BLEND_SATURATION, BLEND_LUMINOSITY, BLEND_LINEAR_BURN, BLEND_SOFT_LIGHT, BLEND_SUBTRACT, BLEND_CHROMA_KEY, BLEND_NORMAL, LOOKUP_AMATORKA,
         GAUSSIAN_BLUR, CROSSHATCH, BOX_BLUR, CGA_COLORSPACE, DILATION, KUWAHARA, RGB_DILATION, SKETCH, TOON, SMOOTH_TOON, BULGE_DISTORTION, GLASS_SPHERE, HAZE, LAPLACIAN, NON_MAXIMUM_SUPPRESSION,
-        SPHERE_REFRACTION, SWIRL, WEAK_PIXEL_INCLUSION, FALSE_COLOR, COLOR_BALANCE
+        SPHERE_REFRACTION, SWIRL, WEAK_PIXEL_INCLUSION, FALSE_COLOR, COLOR_BALANCE, LEVELS_FILTER_MIN
     }
 
     private static class FilterList {
@@ -381,6 +387,8 @@ public FilterAdjuster(final GPUImageFilter filter) {
                 adjuster = new SwirlAdjuster().filter(filter);
             } else if (filter instanceof GPUImageColorBalanceFilter) {
                 adjuster = new ColorBalanceAdjuster().filter(filter);
+            } else if (filter instanceof GPUImageLevelsFilter) {
+                adjuster = new LevelsMinMidAdjuster().filter(filter);
             } else {
                 adjuster = null;
             }
@@ -628,5 +636,12 @@ public void adjust(int percentage) {
                         range(percentage / 3, 0.0f, 1.0f)});
             }
         }
+
+        private class LevelsMinMidAdjuster extends Adjuster<GPUImageLevelsFilter> {
+            @Override
+            public void adjust(int percentage) {
+                getFilter().setMin(0.0f, range(percentage, 0.0f, 1.0f) , 1.0f);
+            }
+        }
     }
 }
