Implement dock object load (#1829)

* Implement dock object load

* Add flags

src/OpenLoco/src/Objects/DockObject.cpp

@@ -2,7 +2,9 @@
 #include "Drawing/SoftwareDrawingEngine.h"
 #include "Graphics/Colour.h"
 #include "Graphics/Gfx.h"
+#include "ObjectImageTable.h"
 #include "ObjectManager.h"
+#include "ObjectStringTable.h"
 #include <OpenLoco/Interop/Interop.hpp>
 
 namespace OpenLoco
@@ -42,11 +44,39 @@ namespace OpenLoco
     // 0x00490E49
     void DockObject::load(const LoadedObjectHandle& handle, stdx::span<const std::byte> data, ObjectManager::DependentObjects*)
     {
-        Interop::registers regs;
-        regs.esi = Interop::X86Pointer(this);
-        regs.ebx = handle.id;
-        regs.ecx = enumValue(handle.type);
-        Interop::call(0x00490E49, regs);
+        auto remainingData = data.subspan(sizeof(DockObject));
+
+        auto strRes = ObjectManager::loadStringTable(remainingData, handle, 0);
+        name = strRes.str;
+        remainingData = remainingData.subspan(strRes.tableLength);
+
+        // Load unk?
+        var_14 = reinterpret_cast<const uint8_t*>(remainingData.data());
+        remainingData = remainingData.subspan(numAux01);
+
+        // Load unk2?
+        var_18 = reinterpret_cast<const uint16_t*>(remainingData.data());
+        remainingData = remainingData.subspan(numAux02Ent * sizeof(uint16_t));
+        for (auto i = 0U; i < numAux02Ent; ++i)
+        {
+            var_1C[0] = reinterpret_cast<const uint8_t*>(remainingData.data());
+            while (*remainingData.data() != static_cast<std::byte>(0xFF))
+            {
+                remainingData = remainingData.subspan(1);
+            }
+            remainingData = remainingData.subspan(1);
+        }
+
+        auto imgRes = ObjectManager::loadImageTable(remainingData);
+        image = imgRes.imageOffset;
+
+        // Related to unk2?
+        const auto offset = (flags & DockObjectFlags::unk01) != DockObjectFlags::none ? numAux02Ent * 4 : 1;
+        var_0C = imgRes.imageOffset + offset;
+
+        // Unused code numAux01 related
+
+        assert(remainingData.size() == imgRes.tableLength);
     }
 
     // 0x00490EC9
@@ -55,6 +85,8 @@ namespace OpenLoco
         name = 0;
         image = 0;
         var_0C = 0;
-        std::fill(std::begin(var_1C), std::end(var_1C), 0);
+        var_14 = nullptr;
+        var_18 = nullptr;
+        std::fill(std::begin(var_1C), std::end(var_1C), nullptr);
     }
 }

src/OpenLoco/src/Objects/DockObject.h

@@ -3,6 +3,7 @@
 #include "Map/Map.hpp"
 #include "Object.h"
 #include "Types.hpp"
+#include <OpenLoco/Core/EnumFlags.hpp>
 #include <OpenLoco/Core/Span.hpp>
 
 namespace OpenLoco
@@ -16,6 +17,13 @@ namespace OpenLoco
         struct RenderTarget;
     }
 
+    enum class DockObjectFlags : uint16_t
+    {
+        none = 0,
+        unk01 = 1U << 0,
+    };
+    OPENLOCO_ENABLE_ENUM_OPERATORS(DockObjectFlags);
+
 #pragma pack(push, 1)
     struct DockObject
     {
@@ -28,14 +36,15 @@ namespace OpenLoco
         uint8_t var_07;
         uint32_t image; // 0x08
         uint32_t var_0C;
-        uint8_t pad_10[0x12 - 0x10];
-        uint8_t numAux01;    // 0x12
-        uint8_t numAux02Ent; // 0x13
-        uint8_t pad_14[0x1C - 0x14];
-        uint32_t var_1C[1];     // odd that this is size 1 but that is how its used
-        uint16_t designedYear;  // 0x20
-        uint16_t obsoleteYear;  // 0x22
-        Map::Pos2 boatPosition; // 0x24
+        DockObjectFlags flags; // 0x10
+        uint8_t numAux01;      // 0x12
+        uint8_t numAux02Ent;   // 0x13 must be 1 or 0
+        const uint8_t* var_14;
+        const uint16_t* var_18;
+        const uint8_t* var_1C[1]; // odd that this is size 1 but that is how its used
+        uint16_t designedYear;    // 0x20
+        uint16_t obsoleteYear;    // 0x22
+        Map::Pos2 boatPosition;   // 0x24
 
         void drawPreviewImage(Gfx::RenderTarget& rt, const int16_t x, const int16_t y) const;
         void drawDescription(Gfx::RenderTarget& rt, const int16_t x, const int16_t y, [[maybe_unused]] const int16_t width) const;