diff options
Diffstat (limited to 'jni/filters/negative.c')
-rw-r--r-- | jni/filters/negative.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/jni/filters/negative.c b/jni/filters/negative.c new file mode 100644 index 000000000..735e583c9 --- /dev/null +++ b/jni/filters/negative.c @@ -0,0 +1,33 @@ +/* + * 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(ImageFilterNegative, nativeApplyFilter, jobject bitmap, jint width, jint height) +{ + char* destination = 0; + AndroidBitmap_lockPixels(env, bitmap, (void**) &destination); + + int tot_len = height * width * 4; + int i; + char * dst = destination; + for (i = 0; i < tot_len; i+=4) { + dst[RED] = 255 - dst[RED]; + dst[GREEN] = 255 - dst[GREEN]; + dst[BLUE] = 255 - dst[BLUE]; + } + AndroidBitmap_unlockPixels(env, bitmap); +} |