mtmd : Fix/Add non-ASCII file path support on Windows

tools/mtmd/clip.cpp

@@ -28,6 +28,13 @@
 #include <numeric>
 #include <functional>
 
+#ifdef _WIN32
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+#include <windows.h>
+#endif
+
 struct clip_logger_state g_logger_state = {GGML_LOG_LEVEL_CONT, clip_log_callback_default, NULL};
 
 enum ffn_op_type {
@@ -2762,7 +2769,21 @@ struct clip_model_loader {
         {
             std::vector<uint8_t> read_buf;
 
+#ifdef _WIN32
+            // Convert UTF-8 to UTF-16 for Windows
+            int wlen = MultiByteToWideChar(CP_UTF8, 0, fname.c_str(), -1, NULL, 0);
+            if (!wlen) {
+                throw std::runtime_error(string_format("%s: failed to convert filename to UTF-16: %s\n", __func__, fname.c_str()));
+            }
+            std::vector<wchar_t> wfname(wlen);
+            wlen = MultiByteToWideChar(CP_UTF8, 0, fname.c_str(), -1, wfname.data(), wlen);
+            if (!wlen) {
+                throw std::runtime_error(string_format("%s: failed to convert filename to UTF-16: %s\n", __func__, fname.c_str()));
+            }
+            auto fin = std::ifstream(wfname.data(), std::ios::binary);
+#else
             auto fin = std::ifstream(fname, std::ios::binary);
+#endif
             if (!fin) {
                 throw std::runtime_error(string_format("%s: failed to open %s\n", __func__, fname.c_str()));
             }

tools/mtmd/mtmd-cli.cpp

@@ -270,6 +270,9 @@ int main(int argc, char ** argv) {
 
     int n_predict = params.n_predict < 0 ? INT_MAX : params.n_predict;
 
+    console::init(params.simple_io, params.use_color);
+    atexit([]() { console::cleanup(); });
+
     // Ctrl+C handling
     {
 #if defined (__unix__) || (defined (__APPLE__) && defined (__MACH__))

tools/mtmd/mtmd-helper.cpp

@@ -437,22 +437,48 @@ mtmd_bitmap * mtmd_helper_bitmap_init_from_buf(mtmd_context * ctx, const unsigne
 }
 
 mtmd_bitmap * mtmd_helper_bitmap_init_from_file(mtmd_context * ctx, const char * fname) {
-    std::vector<unsigned char> buf;
+#ifdef _WIN32
+    // Convert UTF-8 to UTF-16 for Windows
+    int wlen = MultiByteToWideChar(CP_UTF8, 0, fname, -1, NULL, 0);
+    if (!wlen) {
+        LOG_ERR("Unable to convert filename to UTF-16: %s\n", fname);
+        return nullptr;
+    }
+
+    std::vector<wchar_t> wfname(wlen);
+    wlen = MultiByteToWideChar(CP_UTF8, 0, fname, -1, wfname.data(), wlen);
+    if (!wlen) {
+        LOG_ERR("Unable to convert filename to UTF-16: %s\n", fname);
+        return nullptr;
+    }
+
+    // Open file with UTF-16 filename
+    FILE * f = _wfopen(wfname.data(), L"rb");
+    if (!f) {
+        LOG_ERR("Unable to open file %s: %s\n", fname, strerror(errno));
+        return nullptr;
+    }
+#else
+    // On non-Windows platforms, use fopen directly
     FILE * f = fopen(fname, "rb");
     if (!f) {
         LOG_ERR("Unable to open file %s: %s\n", fname, strerror(errno));
         return nullptr;
     }
+#endif
 
+    // Read file content
+    std::vector<unsigned char> buf;
     fseek(f, 0, SEEK_END);
     long file_size = ftell(f);
     fseek(f, 0, SEEK_SET);
     buf.resize(file_size);
 
     size_t n_read = fread(buf.data(), 1, file_size, f);
     fclose(f);
+
     if (n_read != (size_t)file_size) {
-        LOG_ERR("Failed to read entire file %s", fname);
+        LOG_ERR("Failed to read entire file %s\n", fname);
         return nullptr;
     }