1 files changed, 48 insertions, 0 deletions
diff --git a/loader/texture.cpp b/loader/texture.cpp
new file mode 100644
index 00000000..c142cf69
--- /dev/null
+++ b/loader/texture.cpp
@@ -0,0 +1,48 @@
+#include "impl.hpp"
+#include "compat/assert.hpp"
+#include <cstring>
+#include <Corrade/Utility/Path.h>
+#include <Magnum/Trade/ImageData.h>
+
+namespace floormat::loader_detail {
+
+fm_noinline
+Trade::ImageData2D loader_impl::texture(StringView prefix, StringView filename_)
+{
+    ensure_plugins();
+
+    const auto N = prefix.size();
+    if (N > 0)
+        fm_assert(prefix[N-1] == '/');
+    fm_assert(filename_.size() < 4096);
+    fm_assert(filename_.find('\\') == filename_.end());
+    fm_assert(filename_.find('\0') == filename_.end());
+    fm_assert(tga_importer);
+    constexpr std::size_t max_extension_length = 16;
+
+    char* const filename = (char*)alloca(filename_.size() + N + 1 + max_extension_length);
+    if (N > 0)
+        std::memcpy(filename, prefix.data(), N);
+    std::memcpy(filename + N, filename_.cbegin(), filename_.size());
+    std::size_t len =  filename_.size() + N;
+
+    for (const auto& extension : std::initializer_list<StringView>{ ".tga", ".png", ".webp", })
+    {
+        std::memcpy(filename + len, extension.data(), extension.size());
+        filename[len + extension.size()] = '\0';
+        auto& importer = extension == StringView(".tga") ? tga_importer : image_importer;
+        if (Path::exists(filename) && importer->openFile(filename))
+        {
+            auto img = importer->image2D(0);
+            if (!img)
+                fm_abort("can't allocate image for '%s'", filename);
+            auto ret = std::move(*img);
+            return ret;
+        }
+    }
+    const auto path = Path::currentDirectory();
+    filename[len] = '\0';
+    fm_abort("can't open image '%s' (cwd '%s')", filename, path ? path->data() : "(null)");
+}
+
+} // namespace floormat::loader_detail