38 lines
637 B
C
38 lines
637 B
C
/**
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* Basic test for gdImageContrast()
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*/
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#include "gd.h"
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#include "gdtest.h"
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static void test_contrast(double contrast);
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int main()
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{
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test_contrast(+50.0);
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test_contrast(-50.0);
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return gdNumFailures();
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}
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static void test_contrast(double contrast)
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{
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gdImagePtr im;
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FILE *fp;
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char basename[256];
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char *path;
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fp = gdTestFileOpen2("gdimagecontrast", "basic.png");
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im = gdImageCreateFromPng(fp);
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fclose(fp);
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gdImageContrast(im, contrast);
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sprintf(basename, "basic%+03.0f.png", contrast);
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path = gdTestFilePath2("gdimagecontrast", basename);
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gdAssertImageEqualsToFile(path, im);
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gdFree(path);
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gdImageDestroy(im);
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}
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