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Diffstat (limited to 'jni/filters/exposure.c')
-rw-r--r-- | jni/filters/exposure.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/jni/filters/exposure.c b/jni/filters/exposure.c new file mode 100644 index 000000000..6b32798c8 --- /dev/null +++ b/jni/filters/exposure.c @@ -0,0 +1,37 @@ +/* + * 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 "filters.h" + +void JNIFUNCF(ImageFilterExposure, 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; + + int m = (255-bright); + + for (i = 0; i < len; i+=4) + { + rgb[RED] = clamp((255*(rgb[RED]))/m); + rgb[GREEN] = clamp((255*(rgb[GREEN]))/m); + rgb[BLUE] = clamp((255*(rgb[BLUE]))/m); + } + AndroidBitmap_unlockPixels(env, bitmap); +} + |