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/*
* 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);
}
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