diff options
Diffstat (limited to 'jni/filters/contrast.c')
-rw-r--r-- | jni/filters/contrast.c | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/jni/filters/contrast.c b/jni/filters/contrast.c deleted file mode 100644 index b04e9364e..000000000 --- a/jni/filters/contrast.c +++ /dev/null @@ -1,56 +0,0 @@ -/* - * Copyright (C) 2012 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include <math.h> -#include "filters.h" - -unsigned char clamp(int c) -{ - int N = 255; - c &= ~(c >> 31); - c -= N; - c &= (c >> 31); - c += N; - return (unsigned char) c; -} - -int clampMax(int c,int max) -{ - c &= ~(c >> 31); - c -= max; - c &= (c >> 31); - c += max; - return c; -} - -void JNIFUNCF(ImageFilterContrast, nativeApplyFilter, jobject bitmap, jint width, jint height, jfloat bright) -{ - char* destination = 0; - AndroidBitmap_lockPixels(env, bitmap, (void**) &destination); - unsigned char * rgb = (unsigned char * )destination; - int i; - int len = width * height * 4; - float m = (float)pow(2, bright/100.); - float c = 127-m*127; - - for (i = 0; i < len; i+=4) { - rgb[RED] = clamp((int)(m*rgb[RED]+c)); - rgb[GREEN] = clamp((int)(m*rgb[GREEN]+c)); - rgb[BLUE] = clamp((int)(m*rgb[BLUE]+c)); - } - AndroidBitmap_unlockPixels(env, bitmap); -} - |