77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
/*
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* Test that reading and writing image resolution values to/from TIFF files
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* works correctly. Set the image resolution, write the file, read the file
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* back and test that the image resolution comes back correct.
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*/
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#include "gd.h"
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#include "gdtest.h"
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int main()
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{
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gdImagePtr src, dst;
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int r, res_x, res_y;
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void *p;
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int size = 0;
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int status = 0;
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src = gdImageCreate(100, 100);
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if (src == NULL) {
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gdTestErrorMsg("could not create src\n");
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return 1;
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}
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r = gdImageColorAllocate(src, 0xFF, 0, 0);
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gdImageFilledRectangle(src, 0, 0, 99, 99, r);
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// gd default DPI is 96; libtiff default is 72.
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// Use something else so we know the value has been
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// written / read correctly.
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res_x = 100;
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res_y = 200;
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src->res_x = res_x;
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src->res_y = res_y;
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#define OUTPUT_TIFF(name) do { \
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FILE *fp = gdTestTempFp(); \
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gdImageTiff(name, fp); \
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fclose(fp); \
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} while (0)
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OUTPUT_TIFF(src);
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p = gdImageTiffPtr(src, &size);
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if (p == NULL) {
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status = 1;
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gdTestErrorMsg("p is null\n");
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goto door0;
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}
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if (size <= 0) {
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status = 1;
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gdTestErrorMsg("size is non-positive\n");
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goto door1;
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}
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dst = gdImageCreateFromTiffPtr(size, p);
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if (dst == NULL) {
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status = 1;
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gdTestErrorMsg("could not create dst\n");
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goto door1;
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}
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if (dst->res_x != res_x) {
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status = 1;
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gdTestErrorMsg("mismatch in res_x (got %d, expected %d)\n", dst->res_x, res_x);
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}
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if (dst->res_y != res_y) {
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status = 1;
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gdTestErrorMsg("mismatch in res_y (got %d, expected %d)\n", dst->res_y, res_y);
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}
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gdImageDestroy(dst);
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door1:
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gdFree(p);
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door0:
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gdImageDestroy(src);
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return status;
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}
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