diff options
Diffstat (limited to 'jni/filters/bw.c')
-rw-r--r-- | jni/filters/bw.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/jni/filters/bw.c b/jni/filters/bw.c new file mode 100644 index 000000000..f075d307e --- /dev/null +++ b/jni/filters/bw.c @@ -0,0 +1,107 @@ +/* + * 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(ImageFilterBW, nativeApplyFilter, jobject bitmap, jint width, jint height) +{ + char* destination = 0; + AndroidBitmap_lockPixels(env, bitmap, (void**) &destination); + int i; + int len = width * height * 4; + float Rf = 0.2999f; + float Gf = 0.587f; + float Bf = 0.114f; + + for (i = 0; i < len; i+=4) + { + int r = destination[RED]; + int g = destination[GREEN]; + int b = destination[BLUE]; + int t = CLAMP(Rf * r + Gf * g + Bf *b); + + destination[RED] = t; + destination[GREEN] = t; + destination[BLUE] = t; + } + AndroidBitmap_unlockPixels(env, bitmap); +} + +void JNIFUNCF(ImageFilterBWRed, nativeApplyFilter, jobject bitmap, jint width, jint height) +{ + char* destination = 0; + AndroidBitmap_lockPixels(env, bitmap, (void**) &destination); + int i; + int len = width * height * 4; + for (i = 0; i < len; i+=4) + { + int r = destination[RED]; + int g = destination[GREEN]; + int b = destination[BLUE]; + int t = (g + b) / 2; + r = t; + g = t; + b = t; + destination[RED] = r; + destination[GREEN] = g; + destination[BLUE] = b; + } + AndroidBitmap_unlockPixels(env, bitmap); +} + +void JNIFUNCF(ImageFilterBWGreen, nativeApplyFilter, jobject bitmap, jint width, jint height) +{ + char* destination = 0; + AndroidBitmap_lockPixels(env, bitmap, (void**) &destination); + int i; + int len = width * height * 4; + for (i = 0; i < len; i+=4) + { + int r = destination[RED]; + int g = destination[GREEN]; + int b = destination[BLUE]; + int t = (r + b) / 2; + r = t; + g = t; + b = t; + destination[RED] = r; + destination[GREEN] = g; + destination[BLUE] = b; + } + AndroidBitmap_unlockPixels(env, bitmap); +} + +void JNIFUNCF(ImageFilterBWBlue, nativeApplyFilter, jobject bitmap, jint width, jint height) +{ + char* destination = 0; + AndroidBitmap_lockPixels(env, bitmap, (void**) &destination); + int i; + int len = width * height * 4; + for (i = 0; i < len; i+=4) + { + int r = destination[RED]; + int g = destination[GREEN]; + int b = destination[BLUE]; + int t = (r + g) / 2; + r = t; + g = t; + b = t; + destination[RED] = r; + destination[GREEN] = g; + destination[BLUE] = b; + } + AndroidBitmap_unlockPixels(env, bitmap); +} |