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