50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
#include <gint/image.h>
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#include <gint/defs/util.h>
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void image_copy(image_t const *src, image_t *dst, bool copy_alpha)
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{
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if(!image_target(src, dst, NOT_P4, DATA_RW, SAME_DEPTH))
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return;
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if(!IMAGE_IS_ALPHA(src->format))
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copy_alpha = true;
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/* Clip the input to match the size of the output */
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int w = min(src->width, dst->width);
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int h = min(src->height, dst->height);
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if(w <= 0 || h <= 0)
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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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if(IMAGE_IS_RGB16(src->format)) {
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int src_alpha = copy_alpha ? -1 : src->alpha;
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int dst_alpha = IMAGE_IS_ALPHA(dst->format) ? -1 : dst->alpha;
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do {
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for(int x = 0; x < w; x++) {
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int px = ((uint16_t *)src_px)[x];
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if(px != src_alpha) {
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px ^= (px == dst_alpha);
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((uint16_t *)dst_px)[x] = px;
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}
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}
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src_px += src->stride;
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dst_px += dst->stride;
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} while(--h > 0);
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}
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else if(IMAGE_IS_P8(src->format)) {
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int src_alpha = copy_alpha ? 256 : src->alpha;
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do {
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for(int x = 0; x < w; x++) {
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int px = ((int8_t *)src_px)[x];
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if(px != src_alpha)
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((int8_t *)dst_px)[x] = px;
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}
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src_px += src->stride;
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dst_px += dst->stride;
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} while(--h > 0);
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}
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}
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