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