Loader: Split SMDH into its own header and import helpers from QGameList

Also rewrite Qt wrappers to use those.

src/core/loader/smdh.cpp

@@ -0,0 +1,54 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstring>
+#include <vector>
+
+#include "common/common_types.h"
+
+#include "core/loader/loader.h"
+#include "core/loader/smdh.h"
+
+#include "video_core/utils.h"
+
+namespace Loader {
+
+bool IsValidSMDH(const std::vector<u8>& smdh_data) {
+    if (smdh_data.size() < sizeof(Loader::SMDH))
+        return false;
+
+    u32 magic;
+    memcpy(&magic, smdh_data.data(), sizeof(u32));
+
+    return Loader::MakeMagic('S', 'M', 'D', 'H') == magic;
+}
+
+std::vector<u16> SMDH::GetIcon(bool large) const {
+    u32 size;
+    const u8* icon_data;
+
+    if (large) {
+        size = 48;
+        icon_data = large_icon.data();
+    } else {
+        size = 24;
+        icon_data = small_icon.data();
+    }
+
+    std::vector<u16> icon(size * size);
+    for (u32 x = 0; x < size; ++x) {
+        for (u32 y = 0; y < size; ++y) {
+            u32 coarse_y = y & ~7;
+            const u8* pixel = icon_data + VideoCore::GetMortonOffset(x, y, 2) + coarse_y * size * 2;
+            icon[x + size * y] = (pixel[1] << 8) + pixel[0];
+        }
+    }
+    return icon;
+}
+
+std::array<u16, 0x40> SMDH::GetShortTitle(Loader::SMDH::TitleLanguage language) const {
+    return titles[static_cast<int>(language)].short_title;
+}
+
+} // namespace