diff options
Diffstat (limited to 'jni/filters/geometry.c')
-rw-r--r-- | jni/filters/geometry.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/jni/filters/geometry.c b/jni/filters/geometry.c new file mode 100644 index 000000000..a0b5aaacf --- /dev/null +++ b/jni/filters/geometry.c @@ -0,0 +1,184 @@ +/* + * 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" +#include <stdio.h> + +__inline__ void flipVertical(char * source, int srcWidth, int srcHeight, char * destination, int dstWidth, int dstHeight){ + //Vertical + size_t cpy_bytes = sizeof(char) * 4; + int width = cpy_bytes * srcWidth; + int length = srcHeight; + int total = length * width; + size_t bytes_to_copy = sizeof(char) * width; + int i = 0; + int temp = total - width; + for (i = 0; i < total; i += width) { + memcpy(destination + temp - i, source + i, bytes_to_copy); + } +} + +__inline__ void flipHorizontal(char * source, int srcWidth, int srcHeight, char * destination, int dstWidth, int dstHeight){ + //Horizontal + size_t cpy_bytes = sizeof(char) * 4; + int width = cpy_bytes * srcWidth; + int length = srcHeight; + int total = length * width; + int i = 0; + int j = 0; + int temp = 0; + for (i = 0; i < total; i+= width) { + temp = width + i - cpy_bytes; + for (j = 0; j < width; j+=cpy_bytes) { + memcpy(destination + temp - j, source + i + j, cpy_bytes); + } + } +} + +__inline__ void flip_fun(int flip, char * source, int srcWidth, int srcHeight, char * destination, int dstWidth, int dstHeight){ + int horiz = (flip & 1) != 0; + int vert = (flip & 2) != 0; + if (horiz && vert){ + int arr_len = dstWidth * dstHeight * sizeof(char) * 4; + char* temp = (char *) malloc(arr_len); + flipHorizontal(source, srcWidth, srcHeight, temp, dstWidth, dstHeight); + flipVertical(temp, dstWidth, dstHeight, destination, dstWidth, dstHeight); + free(temp); + return; + } + if (horiz){ + flipHorizontal(source, srcWidth, srcHeight, destination, dstWidth, dstHeight); + return; + } + if (vert){ + flipVertical(source, srcWidth, srcHeight, destination, dstWidth, dstHeight); + return; + } +} + +//90 CCW (opposite of what's used in UI?) +__inline__ void rotate90(char * source, int srcWidth, int srcHeight, char * destination, int dstWidth, int dstHeight){ + size_t cpy_bytes = sizeof(char) * 4; + int width = cpy_bytes * srcWidth; + int length = srcHeight; + int total = length * width; + int i = 0; + int j = 0; + for (j = 0; j < length * cpy_bytes; j+= cpy_bytes){ + for (i = 0; i < width; i+=cpy_bytes){ + int column_disp = (width - cpy_bytes - i) * length; + int row_disp = j; + memcpy(destination + column_disp + row_disp , source + j * srcWidth + i, cpy_bytes); + } + } +} + +__inline__ void rotate180(char * source, int srcWidth, int srcHeight, char * destination, int dstWidth, int dstHeight){ + flip_fun(3, source, srcWidth, srcHeight, destination, dstWidth, dstHeight); +} + +__inline__ void rotate270(char * source, int srcWidth, int srcHeight, char * destination, int dstWidth, int dstHeight){ + rotate90(source, srcWidth, srcHeight, destination, dstWidth, dstHeight); + flip_fun(3, destination, dstWidth, dstHeight, destination, dstWidth, dstHeight); +} + +// rotate == 1 is 90 degrees, 2 is 180, 3 is 270 (positive is CCW). +__inline__ void rotate_fun(int rotate, char * source, int srcWidth, int srcHeight, char * destination, int dstWidth, int dstHeight){ + switch( rotate ) + { + case 1: + rotate90(source, srcWidth, srcHeight, destination, dstWidth, dstHeight); + break; + case 2: + rotate180(source, srcWidth, srcHeight, destination, dstWidth, dstHeight); + break; + case 3: + rotate270(source, srcWidth, srcHeight, destination, dstWidth, dstHeight); + break; + default: + break; + } +} + +__inline__ void crop(char * source, int srcWidth, int srcHeight, char * destination, int dstWidth, int dstHeight, int offsetWidth, int offsetHeight){ + size_t cpy_bytes = sizeof(char) * 4; + int row_width = cpy_bytes * srcWidth; + int new_row_width = cpy_bytes * dstWidth; + if ((srcWidth > dstWidth + offsetWidth) || (srcHeight > dstHeight + offsetHeight)){ + return; + } + int i = 0; + int j = 0; + for (j = offsetHeight; j < offsetHeight + dstHeight; j++){ + memcpy(destination + (j - offsetHeight) * new_row_width, source + j * row_width + offsetWidth * cpy_bytes, cpy_bytes * dstWidth ); + } +} + +void JNIFUNCF(ImageFilterGeometry, nativeApplyFilterFlip, jobject src, jint srcWidth, jint srcHeight, jobject dst, jint dstWidth, jint dstHeight, jint flip) { + char* destination = 0; + char* source = 0; + if (srcWidth != dstWidth || srcHeight != dstHeight) { + return; + } + AndroidBitmap_lockPixels(env, src, (void**) &source); + AndroidBitmap_lockPixels(env, dst, (void**) &destination); + flip_fun(flip, source, srcWidth, srcHeight, destination, dstWidth, dstHeight); + AndroidBitmap_unlockPixels(env, dst); + AndroidBitmap_unlockPixels(env, src); +} + +void JNIFUNCF(ImageFilterGeometry, nativeApplyFilterRotate, jobject src, jint srcWidth, jint srcHeight, jobject dst, jint dstWidth, jint dstHeight, jint rotate) { + char* destination = 0; + char* source = 0; + int len = dstWidth * dstHeight * 4; + AndroidBitmap_lockPixels(env, src, (void**) &source); + AndroidBitmap_lockPixels(env, dst, (void**) &destination); + rotate_fun(rotate, source, srcWidth, srcHeight, destination, dstWidth, dstHeight); + AndroidBitmap_unlockPixels(env, dst); + AndroidBitmap_unlockPixels(env, src); +} + +void JNIFUNCF(ImageFilterGeometry, nativeApplyFilterCrop, jobject src, jint srcWidth, jint srcHeight, jobject dst, jint dstWidth, jint dstHeight, jint offsetWidth, jint offsetHeight) { + char* destination = 0; + char* source = 0; + int len = dstWidth * dstHeight * 4; + AndroidBitmap_lockPixels(env, src, (void**) &source); + AndroidBitmap_lockPixels(env, dst, (void**) &destination); + crop(source, srcWidth, srcHeight, destination, dstWidth, dstHeight, offsetWidth, offsetHeight); + AndroidBitmap_unlockPixels(env, dst); + AndroidBitmap_unlockPixels(env, src); +} + +void JNIFUNCF(ImageFilterGeometry, nativeApplyFilterStraighten, jobject src, jint srcWidth, jint srcHeight, jobject dst, jint dstWidth, jint dstHeight, jfloat straightenAngle) { + char* destination = 0; + char* source = 0; + int len = dstWidth * dstHeight * 4; + AndroidBitmap_lockPixels(env, src, (void**) &source); + AndroidBitmap_lockPixels(env, dst, (void**) &destination); + // TODO: implement straighten + int i = 0; + for (; i < len; i += 4) { + int r = source[RED]; + int g = source[GREEN]; + int b = source[BLUE]; + destination[RED] = 128; + destination[GREEN] = g; + destination[BLUE] = 128; + } + AndroidBitmap_unlockPixels(env, dst); + AndroidBitmap_unlockPixels(env, src); +} + |