48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
#include <gint/image.h>
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void image_hflip(image_t const *src, image_t *dst)
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{
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if(!image_target(src, dst, DATA_RW, SAME_DEPTH, SAME_SIZE))
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return;
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void *src_px = src->data;
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void *dst_px = dst->data;
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int src_alpha = image_alpha(src->format);
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int dst_alpha = image_alpha(dst->format);
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int h = src->height;
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if(IMAGE_IS_RGB16(src->format)) {
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while(h-- > 0) {
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for(int x1 = 0; x1 < (src->width + 1) >> 1; x1++) {
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int x2 = src->width - 1 - x1;
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int px1 = ((uint16_t *)src_px)[x1];
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int px2 = ((uint16_t *)src_px)[x2];
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if(px1 != src_alpha)
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((uint16_t *)dst_px)[x2] = px1 - (px1 == dst_alpha);
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if(px2 != src_alpha)
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((uint16_t *)dst_px)[x1] = px2 - (px2 == dst_alpha);
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}
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src_px += src->stride;
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dst_px += dst->stride;
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}
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}
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else if(IMAGE_IS_P8(src->format)) {
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while(h-- > 0) {
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for(int x1 = 0; x1 < (src->width + 1) >> 1; x1++) {
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int x2 = src->width - 1 - x1;
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int px1 = ((int8_t *)src_px)[x1];
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int px2 = ((int8_t *)src_px)[x2];
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if(px1 != src_alpha)
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((int8_t *)dst_px)[x2] = px1;
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if(px2 != src_alpha)
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((int8_t *)dst_px)[x1] = px2;
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}
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src_px += src->stride;
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dst_px += dst->stride;
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}
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}
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}
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