mirror of
https://github.com/nothings/stb
synced 2024-12-16 04:42:42 +03:00
69 lines
1.5 KiB
C++
69 lines
1.5 KiB
C++
#ifdef _WIN32
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#define STBR_ASSERT(x) \
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if (!(x)) \
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__debugbreak();
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#endif
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#define STB_RESAMPLE_IMPLEMENTATION
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#define STB_RESAMPLE_STATIC
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#include "stb_resample.h"
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#define STB_IMAGE_WRITE_IMPLEMENTATION
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#include "stb_image_write.h"
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#define STB_IMAGE_IMPLEMENTATION
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#include "stb_image.h"
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#ifdef _WIN32
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#include <sys/timeb.h>
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#endif
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int main(int argc, char** argv)
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{
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unsigned char* input_data;
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unsigned char* output_data;
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int w, h;
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int n;
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int out_w, out_h, out_stride;
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if (argc <= 1)
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{
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printf("No input image\n");
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return 1;
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}
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input_data = stbi_load(argv[1], &w, &h, &n, 0);
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if (!input_data)
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{
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printf("Input image could not be loaded");
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return 1;
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}
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out_w = 256;
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out_h = 256;
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out_stride = (out_w + 10) * n;
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output_data = (unsigned char*)malloc(out_stride * out_h);
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int in_w = 512;
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int in_h = 512;
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size_t memory_required = stbr_calculate_memory(in_w, in_h, w*n, out_w, out_h, out_stride, n, STBR_FILTER_CATMULLROM);
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void* extra_memory = malloc(memory_required);
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// Cut out the outside 64 pixels all around to test the stride.
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int border = 64;
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STBR_ASSERT(in_w + border <= w);
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STBR_ASSERT(in_h + border <= h);
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stbr_resize_arbitrary(input_data + w * border * n + border * n, in_w, in_h, w*n, output_data, out_w, out_h, out_stride, n, STBR_TYPE_UINT8, STBR_FILTER_CATMULLROM, STBR_EDGE_CLAMP, STBR_COLORSPACE_SRGB, extra_memory, memory_required);
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free(extra_memory);
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stbi_write_png("output.png", out_w, out_h, n, output_data, out_stride);
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free(output_data);
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return 0;
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}
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