diff options
Diffstat (limited to 'jni/filters/hue.c')
-rw-r--r-- | jni/filters/hue.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/jni/filters/hue.c b/jni/filters/hue.c new file mode 100644 index 000000000..a4aef936d --- /dev/null +++ b/jni/filters/hue.c @@ -0,0 +1,46 @@ +/* + * 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); +} + |