#include"img.h"

#include<mm_malloc.h>
#include<string.h>

CUTIVIS CHiImage* CHi_Image_New(uint8_t bpc, uint8_t channels, uint16_t stride, uint16_t width, uint16_t height, void *data) {
	CHiImage *img = malloc(sizeof(*img));
	img->bpc = bpc;
	img->channels = channels;
	img->stride = stride;
	img->width = width;
	img->height = height;
	if(data) img->data16 = data;
	else img->data16 = _mm_malloc(bpc * stride * height, 16);
	img->owned = !data;
	
	return img;
}

CUTIVIS void CHi_Image_Free(CHiImage *img) {
	if(img->owned) {
		_mm_free(img->data16);
	}
	free(img);
}

CUTIVIS void CHi_Restride(const void *oldbuf_, void *newbuf_, uint16_t oldStride, uint16_t newStride, uint16_t rows) {
	const uint8_t *oldbuf = oldbuf_;
	uint8_t *newbuf = newbuf_;
	
	if(oldStride == newStride && oldbuf == newbuf) {
		return;
	}
	
	while(rows) {
		uint16_t row = --rows;
		memmove(&newbuf[newStride * row], &oldbuf[oldStride * row], oldStride);
	}
}