| /* |
| * 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(ImageFilterHue, nativeApplyFilter, jobject bitmap, jint width, jint height, jfloatArray matrix) |
| { |
| char* destination = 0; |
| AndroidBitmap_lockPixels(env, bitmap, (void**) &destination); |
| unsigned char * rgb = (unsigned char * )destination; |
| int i; |
| int len = width * height * 4; |
| jfloat* mat = (*env)->GetFloatArrayElements(env, matrix,0); |
| |
| for (i = 0; i < len; i+=4) |
| { |
| int r = rgb[RED]; |
| int g = rgb[GREEN]; |
| int b = rgb[BLUE]; |
| |
| float rf = r*mat[0] + g*mat[4] + b*mat[8] + mat[12]; |
| float gf = r*mat[1] + g*mat[5] + b*mat[9] + mat[13]; |
| float bf = r*mat[2] + g*mat[6] + b*mat[10] + mat[14]; |
| |
| rgb[RED] = clamp((int)rf); |
| rgb[GREEN] = clamp((int)gf); |
| rgb[BLUE] = clamp((int)bf); |
| } |
| |
| (*env)->ReleaseFloatArrayElements(env, matrix, mat, 0); |
| AndroidBitmap_unlockPixels(env, bitmap); |
| } |
| |