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vo_opengl: gl_lcms: use mp_path_join()
Maybe this fixes the win32 problems a user had, or maybe not. Also, check if cache_dir is set at all. An empty string should be equivalent to "unset".
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@ -206,7 +206,7 @@ bool gl_lcms_get_lut3d(struct gl_lcms *p, struct lut3d **result_lut3d)
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cmsContext cms = NULL;
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char *cache_file = NULL;
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if (p->opts.cache_dir) {
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if (p->opts.cache_dir && p->opts.cache_dir[0]) {
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// Gamma is included in the header to help uniquely identify it,
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// because we may change the parameter in the future or make it
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// customizable, same for the primaries.
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@ -224,10 +224,10 @@ bool gl_lcms_get_lut3d(struct gl_lcms *p, struct lut3d **result_lut3d)
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av_sha_final(sha, hash);
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av_free(sha);
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cache_file = talloc_strdup(tmp, p->opts.cache_dir);
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cache_file = talloc_asprintf_append(cache_file, "/");
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cache_file = talloc_strdup(tmp, "");
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for (int i = 0; i < sizeof(hash); i++)
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cache_file = talloc_asprintf_append(cache_file, "%02X", hash[i]);
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cache_file = mp_path_join(tmp, bstr0(p->opts.cache_dir), bstr0(cache_file));
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}
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// check cache
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