55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/**
|
|
* Copyright (c) 2021 Dominic Masters
|
|
*
|
|
* This software is released under the MIT License.
|
|
* https://opensource.org/licenses/MIT
|
|
*/
|
|
|
|
#include "image.h"
|
|
|
|
#ifndef STB_IMAGE_IMPLEMENTATION
|
|
#define STB_IMAGE_IMPLEMENTATION
|
|
#include <stb_image.h>
|
|
#endif
|
|
|
|
#ifndef STB_IMAGE_RESIZE_IMPLEMENTATION
|
|
#define STB_IMAGE_RESIZE_IMPLEMENTATION
|
|
#include <stb_image_resize.h>
|
|
#endif
|
|
|
|
#ifndef STB_IMAGE_WRITE_IMPLEMENTATION
|
|
#define STB_IMAGE_WRITE_IMPLEMENTATION
|
|
#include <stb_image_write.h>
|
|
#endif
|
|
|
|
void imageCopy(
|
|
uint8_t *source, int32_t sourceWidth, int32_t sourceHeight,
|
|
uint8_t *dest, int32_t destWidth, int32_t destHeight,
|
|
int32_t cropX, int32_t cropY, int32_t cropWidth, int32_t cropHeight,
|
|
int32_t pasteX, int32_t pasteY,
|
|
int32_t channels
|
|
) {
|
|
int32_t x, y, c;
|
|
int32_t absX, absY;
|
|
int32_t sourceIndex, targetIndex;
|
|
|
|
if(cropX == -1) cropX = 0;
|
|
if(cropY == -1) cropY = 0;
|
|
if(cropWidth == -1) cropWidth = sourceWidth;
|
|
if(cropHeight == -1) cropHeight = sourceHeight;
|
|
if(pasteX == -1) pasteX = 0;
|
|
if(pasteY == -1) pasteY = 0;
|
|
|
|
for(x = cropX; x < cropX + cropWidth; x++) {
|
|
for(y = cropY; y < cropY + cropHeight; y++) {
|
|
absX = x - cropX + pasteX;
|
|
absY = y - cropY + pasteY;
|
|
if(absX >= destWidth || absY >= destHeight || absX < 0 || absY < 0)continue;
|
|
targetIndex = absY * destWidth + absX;
|
|
sourceIndex = y * sourceWidth + x;
|
|
for(c = 0; c < channels; c++) {
|
|
dest[(targetIndex*channels) + c] = source[(sourceIndex*channels) + c];
|
|
}
|
|
}
|
|
}
|
|
} |