Added Data Processor using Nodes (#152)

* Added imnodes

* Added basic data processor view. Still needs to be cleaned up

* Make sure all attached links get properly removed when a Node is deleted

* Cleanup and API exposing

* Added data provider overlays and integrate them with the data processor

* Optimized data processing

* Node UI enhancements

* Added support for all themes to the nodes editor

* Improved data processor context menus

* Fixed data processor context menu showing up everywhere

* Make hex editor context menu behave the same as data processor one

* Add different node pin types and prevent incompatible ones from being connected

* Don't require explicitly marking node as end node

* Fixed plugin copying

* Added some more nodes

CMakeLists.txt

@@ -61,6 +61,7 @@ add_executable(imhex ${application_type}
         source/views/view_patches.cpp
         source/views/view_command_palette.cpp
         source/views/view_settings.cpp
+        source/views/view_data_processor.cpp
 
         ${imhex_icon}
         )

cmake/build_helpers.cmake

@@ -139,13 +139,15 @@ endmacro()
 
 macro(createPackage)
     file(MAKE_DIRECTORY "plugins")
+
     foreach (plugin IN LISTS PLUGINS)
         add_subdirectory("plugins/${plugin}")
         add_custom_command(TARGET imhex POST_BUILD
-                COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                COMMAND ${CMAKE_COMMAND} -E copy
                 $<TARGET_FILE:${plugin}>
-                $<TARGET_FILE_DIR:imhex>/plugins)
+                $<TARGET_FILE_DIR:imhex>/plugins/$<TARGET_FILE_NAME:${plugin}>)
     endforeach()
+
     add_custom_command(TARGET imhex POST_BUILD
             COMMAND ${CMAKE_COMMAND} -E copy_if_different
             $<TARGET_FILE:libimhex>

external/ImGui/CMakeLists.txt

@@ -11,17 +11,18 @@ pkg_search_module(GLFW REQUIRED glfw3)
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
 
 add_library(imgui
-    source/imgui.cpp
+        source/imgui.cpp
-    source/imgui_demo.cpp
+        source/imgui_demo.cpp
-    source/imgui_draw.cpp
+        source/imgui_draw.cpp
-    source/imgui_freetype.cpp
+        source/imgui_freetype.cpp
-    source/imgui_impl_glfw.cpp
+        source/imgui_impl_glfw.cpp
-    source/imgui_impl_opengl3.cpp
+        source/imgui_impl_opengl3.cpp
-    source/imgui_tables.cpp
+        source/imgui_tables.cpp
-    source/imgui_widgets.cpp
+        source/imgui_widgets.cpp
-    source/ImGuiFileBrowser.cpp
+        source/ImGuiFileBrowser.cpp
-    source/TextEditor.cpp
+        source/TextEditor.cpp
-    source/imgui_imhex_extensions.cpp
+        source/imgui_imhex_extensions.cpp
+        source/imnodes.cpp
 )
 
 add_compile_definitions(IMGUI_IMPL_OPENGL_LOADER_GLAD)

external/ImGui/include/imnodes.h

@@ -0,0 +1,323 @@
+#pragma once
+
+#include <stddef.h>
+
+struct ImVec2;
+
+namespace imnodes
+{
+enum ColorStyle
+{
+    ColorStyle_NodeBackground = 0,
+    ColorStyle_NodeBackgroundHovered,
+    ColorStyle_NodeBackgroundSelected,
+    ColorStyle_NodeOutline,
+    ColorStyle_TitleBar,
+    ColorStyle_TitleBarHovered,
+    ColorStyle_TitleBarSelected,
+    ColorStyle_Link,
+    ColorStyle_LinkHovered,
+    ColorStyle_LinkSelected,
+    ColorStyle_Pin,
+    ColorStyle_PinHovered,
+    ColorStyle_BoxSelector,
+    ColorStyle_BoxSelectorOutline,
+    ColorStyle_GridBackground,
+    ColorStyle_GridLine,
+    ColorStyle_Count
+};
+
+enum StyleVar
+{
+    StyleVar_GridSpacing = 0,
+    StyleVar_NodeCornerRounding,
+    StyleVar_NodePaddingHorizontal,
+    StyleVar_NodePaddingVertical,
+    StyleVar_NodeBorderThickness,
+    StyleVar_LinkThickness,
+    StyleVar_LinkLineSegmentsPerLength,
+    StyleVar_LinkHoverDistance,
+    StyleVar_PinCircleRadius,
+    StyleVar_PinQuadSideLength,
+    StyleVar_PinTriangleSideLength,
+    StyleVar_PinLineThickness,
+    StyleVar_PinHoverRadius,
+    StyleVar_PinOffset
+};
+
+enum StyleFlags
+{
+    StyleFlags_None = 0,
+    StyleFlags_NodeOutline = 1 << 0,
+    StyleFlags_GridLines = 1 << 2
+};
+
+// This enum controls the way attribute pins look.
+enum PinShape
+{
+    PinShape_Circle,
+    PinShape_CircleFilled,
+    PinShape_Triangle,
+    PinShape_TriangleFilled,
+    PinShape_Quad,
+    PinShape_QuadFilled
+};
+
+// This enum controls the way the attribute pins behave.
+enum AttributeFlags
+{
+    AttributeFlags_None = 0,
+    // Allow detaching a link by left-clicking and dragging the link at a pin it is connected to.
+    // NOTE: the user has to actually delete the link for this to work. A deleted link can be
+    // detected by calling IsLinkDestroyed() after EndNodeEditor().
+    AttributeFlags_EnableLinkDetachWithDragClick = 1 << 0,
+    // Visual snapping of an in progress link will trigger IsLink Created/Destroyed events. Allows
+    // for previewing the creation of a link while dragging it across attributes. See here for demo:
+    // https://github.com/Nelarius/imnodes/issues/41#issuecomment-647132113 NOTE: the user has to
+    // actually delete the link for this to work. A deleted link can be detected by calling
+    // IsLinkDestroyed() after EndNodeEditor().
+    AttributeFlags_EnableLinkCreationOnSnap = 1 << 1
+};
+
+struct IO
+{
+    struct EmulateThreeButtonMouse
+    {
+        EmulateThreeButtonMouse();
+
+        // Controls whether this feature is enabled or not.
+        bool enabled;
+        const bool* modifier; // The keyboard modifier to use with the mouse left click. Set to
+                              // &ImGuiIO::KeyAlt by default.
+    } emulate_three_button_mouse;
+
+    struct LinkDetachWithModifierClick
+    {
+        LinkDetachWithModifierClick();
+
+        // Pointer to a boolean value indicating when the desired modifier is pressed. Set to NULL
+        // by default (i.e. this feature is disabled). To enable the feature, set the link to point
+        // to, for example, &ImGuiIO::KeyCtrl.
+        //
+        // Left-clicking a link with this modifier pressed will detach that link. NOTE: the user has
+        // to actually delete the link for this to work. A deleted link can be detected by calling
+        // IsLinkDestroyed() after EndNodeEditor().
+        const bool* modifier;
+    } link_detach_with_modifier_click;
+
+    IO();
+};
+
+struct Style
+{
+    float grid_spacing;
+
+    float node_corner_rounding;
+    float node_padding_horizontal;
+    float node_padding_vertical;
+    float node_border_thickness;
+
+    float link_thickness;
+    float link_line_segments_per_length;
+    float link_hover_distance;
+
+    // The following variables control the look and behavior of the pins. The default size of each
+    // pin shape is balanced to occupy approximately the same surface area on the screen.
+
+    // The circle radius used when the pin shape is either PinShape_Circle or PinShape_CircleFilled.
+    float pin_circle_radius;
+    // The quad side length used when the shape is either PinShape_Quad or PinShape_QuadFilled.
+    float pin_quad_side_length;
+    // The equilateral triangle side length used when the pin shape is either PinShape_Triangle or
+    // PinShape_TriangleFilled.
+    float pin_triangle_side_length;
+    // The thickness of the line used when the pin shape is not filled.
+    float pin_line_thickness;
+    // The radius from the pin's center position inside of which it is detected as being hovered
+    // over.
+    float pin_hover_radius;
+    // Offsets the pins' positions from the edge of the node to the outside of the node.
+    float pin_offset;
+
+    // By default, StyleFlags_NodeOutline and StyleFlags_Gridlines are enabled.
+    StyleFlags flags;
+    // Set these mid-frame using Push/PopColorStyle. You can index this color array with with a
+    // ColorStyle enum value.
+    unsigned int colors[ColorStyle_Count];
+
+    Style();
+};
+
+// An editor context corresponds to a set of nodes in a single workspace (created with a single
+// Begin/EndNodeEditor pair)
+//
+// By default, the library creates an editor context behind the scenes, so using any of the imnodes
+// functions doesn't require you to explicitly create a context.
+struct EditorContext;
+
+EditorContext* EditorContextCreate();
+void EditorContextFree(EditorContext*);
+void EditorContextSet(EditorContext*);
+ImVec2 EditorContextGetPanning();
+void EditorContextResetPanning(const ImVec2& pos);
+void EditorContextMoveToNode(const int node_id);
+
+// Initialize the node editor system.
+void Initialize();
+void Shutdown();
+
+IO& GetIO();
+
+// Returns the global style struct. See the struct declaration for default values.
+Style& GetStyle();
+// Style presets matching the dear imgui styles of the same name.
+void StyleColorsDark(); // on by default
+void StyleColorsClassic();
+void StyleColorsLight();
+
+// The top-level function call. Call this before calling BeginNode/EndNode. Calling this function
+// will result the node editor grid workspace being rendered.
+void BeginNodeEditor();
+void EndNodeEditor();
+
+// Use PushColorStyle and PopColorStyle to modify Style::colors mid-frame.
+void PushColorStyle(ColorStyle item, unsigned int color);
+void PopColorStyle();
+void PushStyleVar(StyleVar style_item, float value);
+void PopStyleVar();
+
+// id can be any positive or negative integer, but INT_MIN is currently reserved for internal use.
+void BeginNode(int id);
+void EndNode();
+
+ImVec2 GetNodeDimensions(int id);
+
+// Place your node title bar content (such as the node title, using ImGui::Text) between the
+// following function calls. These functions have to be called before adding any attributes, or the
+// layout of the node will be incorrect.
+void BeginNodeTitleBar();
+void EndNodeTitleBar();
+
+// Attributes are ImGui UI elements embedded within the node. Attributes can have pin shapes
+// rendered next to them. Links are created between pins.
+//
+// The activity status of an attribute can be checked via the IsAttributeActive() and
+// IsAnyAttributeActive() function calls. This is one easy way of checking for any changes made to
+// an attribute's drag float UI, for instance.
+//
+// Each attribute id must be unique.
+
+// Create an input attribute block. The pin is rendered on left side.
+void BeginInputAttribute(int id, PinShape shape = PinShape_CircleFilled);
+void EndInputAttribute();
+// Create an output attribute block. The pin is rendered on the right side.
+void BeginOutputAttribute(int id, PinShape shape = PinShape_CircleFilled);
+void EndOutputAttribute();
+// Create a static attribute block. A static attribute has no pin, and therefore can't be linked to
+// anything. However, you can still use IsAttributeActive() and IsAnyAttributeActive() to check for
+// attribute activity.
+void BeginStaticAttribute(int id);
+void EndStaticAttribute();
+
+// Push a single AttributeFlags value. By default, only AttributeFlags_None is set.
+void PushAttributeFlag(AttributeFlags flag);
+void PopAttributeFlag();
+
+// Render a link between attributes.
+// The attributes ids used here must match the ids used in Begin(Input|Output)Attribute function
+// calls. The order of start_attr and end_attr doesn't make a difference for rendering the link.
+void Link(int id, int start_attribute_id, int end_attribute_id);
+
+// Enable or disable the ability to click and drag a specific node.
+void SetNodeDraggable(int node_id, const bool draggable);
+
+// The node's position can be expressed in three coordinate systems:
+// * screen space coordinates, -- the origin is the upper left corner of the window.
+// * editor space coordinates -- the origin is the upper left corner of the node editor window
+// * grid space coordinates, -- the origin is the upper left corner of the node editor window,
+// translated by the current editor panning vector (see EditorContextGetPanning() and
+// EditorContextResetPanning())
+
+// Use the following functions to get and set the node's coordinates in these coordinate systems.
+
+void SetNodeScreenSpacePos(int node_id, const ImVec2& screen_space_pos);
+void SetNodeEditorSpacePos(int node_id, const ImVec2& editor_space_pos);
+void SetNodeGridSpacePos(int node_id, const ImVec2& grid_pos);
+
+ImVec2 GetNodeScreenSpacePos(const int node_id);
+ImVec2 GetNodeEditorSpacePos(const int node_id);
+ImVec2 GetNodeGridSpacePos(const int node_id);
+
+// Returns true if the current node editor canvas is being hovered over by the mouse, and is not
+// blocked by any other windows.
+bool IsEditorHovered();
+// The following functions return true if a UI element is being hovered over by the mouse cursor.
+// Assigns the id of the UI element being hovered over to the function argument. Use these functions
+// after EndNodeEditor() has been called.
+bool IsNodeHovered(int* node_id);
+bool IsLinkHovered(int* link_id);
+bool IsPinHovered(int* attribute_id);
+
+// Use The following two functions to query the number of selected nodes or links in the current
+// editor. Use after calling EndNodeEditor().
+int NumSelectedNodes();
+int NumSelectedLinks();
+// Get the selected node/link ids. The pointer argument should point to an integer array with at
+// least as many elements as the respective NumSelectedNodes/NumSelectedLinks function call
+// returned.
+void GetSelectedNodes(int* node_ids);
+void GetSelectedLinks(int* link_ids);
+
+// Clears the list of selected nodes/links. Useful if you want to delete a selected node or link.
+void ClearNodeSelection();
+void ClearLinkSelection();
+
+// Was the previous attribute active? This will continuously return true while the left mouse button
+// is being pressed over the UI content of the attribute.
+bool IsAttributeActive();
+// Was any attribute active? If so, sets the active attribute id to the output function argument.
+bool IsAnyAttributeActive(int* attribute_id = NULL);
+
+// Use the following functions to query a change of state for an existing link, or new link. Call
+// these after EndNodeEditor().
+
+// Did the user start dragging a new link from a pin?
+bool IsLinkStarted(int* started_at_attribute_id);
+// Did the user drop the dragged link before attaching it to a pin?
+// There are two different kinds of situations to consider when handling this event:
+// 1) a link which is created at a pin and then dropped
+// 2) an existing link which is detached from a pin and then dropped
+// Use the including_detached_links flag to control whether this function triggers when the user
+// detaches a link and drops it.
+bool IsLinkDropped(int* started_at_attribute_id = NULL, bool including_detached_links = true);
+// Did the user finish creating a new link?
+bool IsLinkCreated(
+    int* started_at_attribute_id,
+    int* ended_at_attribute_id,
+    bool* created_from_snap = NULL);
+bool IsLinkCreated(
+    int* started_at_node_id,
+    int* started_at_attribute_id,
+    int* ended_at_node_id,
+    int* ended_at_attribute_id,
+    bool* created_from_snap = NULL);
+
+// Was an existing link detached from a pin by the user? The detached link's id is assigned to the
+// output argument link_id.
+bool IsLinkDestroyed(int* link_id);
+
+// Use the following functions to write the editor context's state to a string, or directly to a
+// file. The editor context is serialized in the INI file format.
+
+const char* SaveCurrentEditorStateToIniString(size_t* data_size = NULL);
+const char* SaveEditorStateToIniString(const EditorContext* editor, size_t* data_size = NULL);
+
+void LoadCurrentEditorStateFromIniString(const char* data, size_t data_size);
+void LoadEditorStateFromIniString(EditorContext* editor, const char* data, size_t data_size);
+
+void SaveCurrentEditorStateToIniFile(const char* file_name);
+void SaveEditorStateToIniFile(const EditorContext* editor, const char* file_name);
+
+void LoadCurrentEditorStateFromIniFile(const char* file_name);
+void LoadEditorStateFromIniFile(EditorContext* editor, const char* file_name);
+} // namespace imnodes

include/views/view_data_processor.hpp

@@ -0,0 +1,40 @@
+#pragma once
+
+#include <hex.hpp>
+
+#include <imgui.h>
+#include <hex/views/view.hpp>
+#include <hex/data_processor/node.hpp>
+#include <hex/data_processor/link.hpp>
+
+#include <array>
+#include <string>
+
+namespace hex {
+
+    namespace prv { class Provider; }
+
+    class ViewDataProcessor : public View {
+    public:
+        ViewDataProcessor();
+        ~ViewDataProcessor() override;
+
+        void drawContent() override;
+        void drawMenu() override;
+
+    private:
+        std::list<dp::Node*> m_endNodes;
+        std::list<dp::Node*> m_nodes;
+        std::list<dp::Link>  m_links;
+
+        std::vector<prv::Overlay*> m_dataOverlays;
+
+        int m_rightClickedId = -1;
+        ImVec2 m_rightClickedCoords;
+
+        void eraseLink(u32 id);
+        void eraseNodes(const std::vector<int> &ids);
+        void processNodes();
+    };
+
+}

plugins/builtin/CMakeLists.txt

@@ -11,6 +11,7 @@ add_library(${PROJECT_NAME} SHARED
         source/content/lang_builtin_functions.cpp
         source/content/settings_entries.cpp
         source/content/tools_entries.cpp
+        source/content/data_processor_nodes.cpp
 
         source/math_evaluator.cpp
 )

plugins/builtin/source/content/data_processor_nodes.cpp

@@ -0,0 +1,297 @@
+#include <hex/plugin.hpp>
+
+#include "math_evaluator.hpp"
+
+namespace hex::plugin::builtin {
+
+    class NodeInteger : public dp::Node {
+    public:
+        NodeInteger() : Node("Integer", { dp::Attribute(dp::Attribute::IOType::Out, dp::Attribute::Type::Integer, "Value") }) {}
+
+        void drawNode() override {
+            ImGui::TextUnformatted("0x"); ImGui::SameLine(0, 0);
+            ImGui::PushItemWidth(100);
+            ImGui::InputScalar("##integerValue", ImGuiDataType_U64, &this->m_value, nullptr, nullptr, "%llx", ImGuiInputTextFlags_CharsHexadecimal);
+            ImGui::PopItemWidth();
+        }
+
+        void process(prv::Overlay *dataOverlay) override {
+            std::vector<u8> data;
+            data.resize(sizeof(this->m_value));
+
+            std::copy(&this->m_value, &this->m_value + 1, data.data());
+            this->getAttributes()[0].getOutputData() = data;
+        }
+
+    private:
+        u64 m_value = 0;
+    };
+
+    class NodeFloat : public dp::Node {
+    public:
+        NodeFloat() : Node("Float", { dp::Attribute(dp::Attribute::IOType::Out, dp::Attribute::Type::Float, "Value") }) {}
+
+        void drawNode() override {
+            ImGui::PushItemWidth(100);
+            ImGui::InputScalar("##floatValue", ImGuiDataType_Float, &this->m_value, nullptr, nullptr, "%f", ImGuiInputTextFlags_CharsDecimal);
+            ImGui::PopItemWidth();
+        }
+
+        void process(prv::Overlay *dataOverlay) override {
+            std::vector<u8> data;
+            data.resize(sizeof(this->m_value));
+
+            std::copy(&this->m_value, &this->m_value + 1, data.data());
+            this->getAttributes()[0].getOutputData() = data;
+        }
+
+    private:
+        float m_value = 0;
+    };
+
+    class NodeRGBA8 : public dp::Node {
+    public:
+        NodeRGBA8() : Node("RGBA8 Color", { dp::Attribute(dp::Attribute::IOType::Out, dp::Attribute::Type::Integer, "Red"),
+                                                         dp::Attribute(dp::Attribute::IOType::Out, dp::Attribute::Type::Integer, "Green"),
+                                                         dp::Attribute(dp::Attribute::IOType::Out, dp::Attribute::Type::Integer, "Blue"),
+                                                         dp::Attribute(dp::Attribute::IOType::Out, dp::Attribute::Type::Integer, "Alpha")}) {}
+
+        void drawNode() override {
+            ImGui::PushItemWidth(200);
+            ImGui::ColorPicker4("##colorPicker", &this->m_color.Value.x, ImGuiColorEditFlags_AlphaBar);
+            ImGui::PopItemWidth();
+        }
+
+        void process(prv::Overlay *dataOverlay) override {
+            std::vector<u8> output(sizeof(u64), 0x00);
+
+            output[0] = this->m_color.Value.x * 0xFF;
+            this->getAttributes()[0].getOutputData() = output;
+            output[0] = this->m_color.Value.y * 0xFF;
+            this->getAttributes()[1].getOutputData() = output;
+            output[0] = this->m_color.Value.z * 0xFF;
+            this->getAttributes()[2].getOutputData() = output;
+            output[0] = this->m_color.Value.w * 0xFF;
+            this->getAttributes()[3].getOutputData() = output;
+        }
+
+    private:
+        ImColor m_color;
+    };
+
+
+    class NodeDisplayInteger : public dp::Node {
+    public:
+        NodeDisplayInteger() : Node("Display Integer", { dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Integer, "Value") }) {}
+
+        void drawNode() override {
+            ImGui::PushItemWidth(150);
+            if (this->m_value.has_value())
+                ImGui::Text("0x%llx", this->m_value.value());
+            else
+                ImGui::TextUnformatted("???");
+            ImGui::PopItemWidth();
+        }
+
+        void process(prv::Overlay *dataOverlay) override {
+            auto connectedInput = this->getConnectedInputAttribute(0);
+            if (connectedInput == nullptr) {
+                this->m_value.reset();
+                return;
+            }
+
+            connectedInput->getParentNode()->process(dataOverlay);
+
+            this->m_value = *reinterpret_cast<u64*>(connectedInput->getOutputData().data());
+        }
+
+    private:
+        std::optional<u64> m_value = 0;
+    };
+
+    class NodeDisplayFloat : public dp::Node {
+    public:
+        NodeDisplayFloat() : Node("Display Float", { dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Float, "Value") }) {}
+
+        void drawNode() override {
+            ImGui::PushItemWidth(150);
+            if (this->m_value.has_value())
+                ImGui::Text("%f", this->m_value.value());
+            else
+                ImGui::TextUnformatted("???");
+            ImGui::PopItemWidth();
+        }
+
+        void process(prv::Overlay *dataOverlay) override {
+            auto connectedInput = this->getConnectedInputAttribute(0);
+            if (connectedInput == nullptr) {
+                this->m_value.reset();
+                return;
+            }
+
+            connectedInput->getParentNode()->process(dataOverlay);
+
+            this->m_value = *reinterpret_cast<float*>(connectedInput->getOutputData().data());
+        }
+
+    private:
+        std::optional<float> m_value = 0;
+    };
+
+
+    class NodeBitwiseNOT : public dp::Node {
+    public:
+        NodeBitwiseNOT() : Node("Bitwise NOT", { dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Buffer, "Input"), dp::Attribute(dp::Attribute::IOType::Out, dp::Attribute::Type::Buffer, "Output") }) {}
+
+        void process(prv::Overlay *dataOverlay) override {
+            auto connectedInput = this->getConnectedInputAttribute(0);
+            if (connectedInput == nullptr)
+                return;
+
+            connectedInput->getParentNode()->process(dataOverlay);
+
+            std::vector<u8> output = connectedInput->getOutputData();
+
+            for (auto &byte : output)
+                byte = ~byte;
+        }
+    };
+
+    class NodeBitwiseAND : public dp::Node {
+    public:
+        NodeBitwiseAND() : Node("Bitwise AND", { dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Buffer, "Input A"), dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Buffer, "Input B"), dp::Attribute(dp::Attribute::IOType::Out, dp::Attribute::Type::Buffer, "Output") }) {}
+
+        void process(prv::Overlay *dataOverlay) override {
+            auto connectedInputA = this->getConnectedInputAttribute(0);
+            auto connectedInputB = this->getConnectedInputAttribute(1);
+            if (connectedInputA == nullptr || connectedInputB == nullptr)
+                return;
+
+            connectedInputA->getParentNode()->process(dataOverlay);
+            connectedInputB->getParentNode()->process(dataOverlay);
+
+            std::vector<u8> inputA = connectedInputA->getOutputData();
+            std::vector<u8> inputB = connectedInputB->getOutputData();
+
+            std::vector<u8> output(std::min(inputA.size(), inputB.size()), 0x00);
+
+            for (u32 i = 0; i < output.size(); i++)
+                output[i] = inputA[i] & inputB[i];
+
+            this->getAttributes()[2].getOutputData() = output;
+        }
+    };
+
+    class NodeBitwiseOR : public dp::Node {
+    public:
+        NodeBitwiseOR() : Node("Bitwise OR", { dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Buffer, "Input A"), dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Buffer, "Input B"), dp::Attribute(dp::Attribute::IOType::Out, dp::Attribute::Type::Buffer, "Output") }) {}
+
+        void process(prv::Overlay *dataOverlay) override {
+            auto connectedInputA = this->getConnectedInputAttribute(0);
+            auto connectedInputB = this->getConnectedInputAttribute(1);
+            if (connectedInputA == nullptr || connectedInputB == nullptr)
+                return;
+
+            connectedInputA->getParentNode()->process(dataOverlay);
+            connectedInputB->getParentNode()->process(dataOverlay);
+
+            std::vector<u8> inputA = connectedInputA->getOutputData();
+            std::vector<u8> inputB = connectedInputB->getOutputData();
+
+            std::vector<u8> output(std::min(inputA.size(), inputB.size()), 0x00);
+
+            for (u32 i = 0; i < output.size(); i++)
+                output[i] = inputA[i] | inputB[i];
+        }
+    };
+
+    class NodeBitwiseXOR : public dp::Node {
+    public:
+        NodeBitwiseXOR() : Node("Bitwise XOR", { dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Buffer, "Input A"), dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Buffer, "Input B"), dp::Attribute(dp::Attribute::IOType::Out, dp::Attribute::Type::Buffer, "Output") }) {}
+
+        void process(prv::Overlay *dataOverlay) override {
+            auto connectedInputA = this->getConnectedInputAttribute(0);
+            auto connectedInputB = this->getConnectedInputAttribute(1);
+            if (connectedInputA == nullptr || connectedInputB == nullptr)
+                return;
+
+            connectedInputA->getParentNode()->process(dataOverlay);
+            connectedInputB->getParentNode()->process(dataOverlay);
+
+            std::vector<u8> inputA = connectedInputA->getOutputData();
+            std::vector<u8> inputB = connectedInputB->getOutputData();
+
+            std::vector<u8> output(std::min(inputA.size(), inputB.size()), 0x00);
+
+            for (u32 i = 0; i < output.size(); i++)
+                output[i] = inputA[i] ^ inputB[i];
+        }
+    };
+
+    class NodeReadData : public dp::Node {
+    public:
+        NodeReadData() : Node("Read Data", { dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Integer, "Address"),
+                                             dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Integer, "Size"),
+                                             dp::Attribute(dp::Attribute::IOType::Out, dp::Attribute::Type::Buffer, "Data")
+        }) { }
+
+        void process(prv::Overlay *dataOverlay) override {
+            auto connectedInputAddress = this->getConnectedInputAttribute(0);
+            auto connectedInputSize = this->getConnectedInputAttribute(1);
+            if (connectedInputAddress == nullptr || connectedInputSize == nullptr)
+                return;
+
+            connectedInputAddress->getParentNode()->process(dataOverlay);
+            connectedInputSize->getParentNode()->process(dataOverlay);
+
+            auto address = *reinterpret_cast<u64*>(connectedInputAddress->getOutputData().data());
+            auto size = *reinterpret_cast<u64*>(connectedInputSize->getOutputData().data());
+
+            std::vector<u8> data;
+            data.resize(size);
+
+            SharedData::currentProvider->readRaw(address, data.data(), size);
+
+            this->getAttributes()[2].getOutputData() = data;
+        }
+    };
+
+    class NodeWriteData : public dp::Node {
+    public:
+        NodeWriteData() : Node("Write Data", { dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Integer, "Address"), dp::Attribute(dp::Attribute::IOType::In, dp::Attribute::Type::Buffer, "Data") }) {}
+
+        void process(prv::Overlay *dataOverlay) override {
+            auto connectedInputAddress = this->getConnectedInputAttribute(0);
+            auto connectedInputData = this->getConnectedInputAttribute(1);
+            if (connectedInputAddress == nullptr || connectedInputData == nullptr)
+                return;
+
+            connectedInputAddress->getParentNode()->process(dataOverlay);
+            connectedInputData->getParentNode()->process(dataOverlay);
+
+            auto address = *reinterpret_cast<u64*>(connectedInputAddress->getOutputData().data());
+            auto data = connectedInputData->getOutputData();
+
+            dataOverlay->setAddress(address);
+            dataOverlay->getData() = data;
+        }
+    };
+
+    void registerDataProcessorNodes() {
+        ContentRegistry::DataProcessorNode::add<NodeInteger>("Constants", "Integer");
+        ContentRegistry::DataProcessorNode::add<NodeFloat>("Constants", "Float");
+        ContentRegistry::DataProcessorNode::add<NodeRGBA8>("Constants", "RGBA8 Color");
+
+        ContentRegistry::DataProcessorNode::add<NodeDisplayInteger>("Display", "Integer");
+        ContentRegistry::DataProcessorNode::add<NodeDisplayFloat>("Display", "Float");
+
+        ContentRegistry::DataProcessorNode::add<NodeReadData>("Data Access", "Read");
+        ContentRegistry::DataProcessorNode::add<NodeWriteData>("Data Access", "Write");
+
+        ContentRegistry::DataProcessorNode::add<NodeBitwiseAND>("Bitwise Operations", "AND");
+        ContentRegistry::DataProcessorNode::add<NodeBitwiseOR>("Bitwise Operations", "OR");
+        ContentRegistry::DataProcessorNode::add<NodeBitwiseXOR>("Bitwise Operations", "XOR");
+        ContentRegistry::DataProcessorNode::add<NodeBitwiseNOT>("Bitwise Operations", "NOT");
+    }
+
+}

plugins/builtin/source/plugin_builtin.cpp

@@ -7,6 +7,7 @@ namespace hex::plugin::builtin {
     void registerPatternLanguageFunctions();
     void registerCommandPaletteCommands();
     void registerSettings();
+    void registerDataProcessorNodes();
 
 }
 
@@ -19,6 +20,7 @@ IMHEX_PLUGIN_SETUP {
     registerPatternLanguageFunctions();
     registerCommandPaletteCommands();
     registerSettings();
+    registerDataProcessorNodes();
 
 }
 

plugins/libimhex/include/hex/api/content_registry.hpp

@@ -17,6 +17,7 @@ namespace hex {
     class View;
     namespace lang { class ASTNode; }
     namespace lang { class Evaluator; }
+    namespace dp { class Node; }
 
     /*
         The Content Registry is the heart of all features in ImHex that are in some way extendable by Plugins.
@@ -144,6 +145,26 @@ namespace hex {
 
             static std::vector<Entry>& getEntries();
         };
+
+        struct DataProcessorNode {
+            using CreatorFunction = std::function<dp::Node*()>;
+            struct Entry {
+                std::string category;
+                std::string name;
+                CreatorFunction creatorFunction;
+            };
+
+            template<hex::derived_from<dp::Node> T, typename ... Args>
+            static void add(std::string_view category, std::string_view name, Args&& ... args) {
+                add(Entry{ category.data(), name.data(), [args...]{ return new T(std::forward<Args>(args)...); } });
+            }
+
+            static void addSeparator();
+
+            static std::vector<Entry>& getEntries();
+        private:
+            static void add(const Entry &entry);
+        };
     };
 
 }

plugins/libimhex/include/hex/data_processor/attribute.hpp

@@ -0,0 +1,54 @@
+#pragma once
+
+namespace hex::dp {
+
+    class Node;
+
+    class Attribute {
+    public:
+        enum class Type {
+            Integer,
+            Float,
+            Buffer
+        };
+
+        enum class IOType {
+            In, Out
+        };
+
+        Attribute(IOType ioType, Type type, std::string_view name) : m_id(SharedData::dataProcessorNodeIdCounter++), m_ioType(ioType), m_type(type), m_name(name) {
+
+        }
+
+        ~Attribute() {
+            for (auto &[linkId, attr] : this->getConnectedAttributes())
+                attr->removeConnectedAttribute(linkId);
+        }
+
+        [[nodiscard]] u32 getID() const { return this->m_id; }
+        [[nodiscard]] IOType getIOType() const { return this->m_ioType; }
+        [[nodiscard]] Type getType() const { return this->m_type; }
+        [[nodiscard]] std::string_view getName() const { return this->m_name; }
+
+        void addConnectedAttribute(u32 linkId, Attribute *to) { this->m_connectedAttributes.insert({ linkId, to }); }
+        void removeConnectedAttribute(u32 linkId) { printf("%d\n", this->m_connectedAttributes.erase(linkId)); }
+        [[nodiscard]] std::map<u32, Attribute*>& getConnectedAttributes() { return this->m_connectedAttributes; }
+
+        [[nodiscard]] Node* getParentNode() { return this->m_parentNode; }
+
+        [[nodiscard]] std::vector<u8>& getOutputData() { return this->m_outputData; }
+    private:
+        u32 m_id;
+        IOType m_ioType;
+        Type m_type;
+        std::string m_name;
+        std::map<u32, Attribute*> m_connectedAttributes;
+        Node *m_parentNode;
+
+        std::vector<u8> m_outputData;
+
+        friend class Node;
+        void setParentNode(Node *node) { this->m_parentNode = node; }
+    };
+
+}

plugins/libimhex/include/hex/data_processor/link.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+namespace hex::dp {
+
+    class Link {
+    public:
+        Link(u32 from, u32 to) : m_id(SharedData::dataProcessorNodeIdCounter++), m_from(from), m_to(to) { }
+
+        [[nodiscard]] u32 getID()     const { return this->m_id;   }
+        [[nodiscard]] u32 getFromID() const { return this->m_from; }
+        [[nodiscard]] u32 getToID()   const { return this->m_to;   }
+
+    private:
+        u32 m_id;
+        u32 m_from, m_to;
+    };
+
+}

plugins/libimhex/include/hex/data_processor/node.hpp

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <hex/data_processor/attribute.hpp>
+
+namespace hex::dp {
+
+    class Node {
+    public:
+        Node(std::string_view title, std::vector<Attribute> attributes) : m_id(SharedData::dataProcessorNodeIdCounter++), m_title(title), m_attributes(std::move(attributes)) {
+            for (auto &attr : this->m_attributes)
+                attr.setParentNode(this);
+        }
+
+        virtual ~Node() = default;
+
+        [[nodiscard]] u32 getID() const { return this->m_id; }
+        [[nodiscard]] std::string_view getTitle() const { return this->m_title; }
+        [[nodiscard]] std::vector<Attribute>& getAttributes() { return this->m_attributes; }
+
+        virtual void drawNode() { }
+        virtual void process(prv::Overlay *dataOverlay) = 0;
+    private:
+        u32 m_id;
+        std::string m_title;
+        std::vector<Attribute> m_attributes;
+
+    protected:
+        Attribute* getConnectedInputAttribute(u32 attributeId) {
+            auto &connectedAttribute = this->getAttributes()[attributeId].getConnectedAttributes();
+
+            if (connectedAttribute.empty())
+                return nullptr;
+
+            return connectedAttribute.begin()->second;
+        }
+    };
+
+}

plugins/libimhex/include/hex/helpers/shared_data.hpp

@@ -24,6 +24,7 @@ namespace hex::plugin::internal {
 namespace hex {
 
     namespace prv { class Provider; }
+    namespace dp { class Node; }
     class View;
 
     class SharedData {
@@ -67,6 +68,9 @@ namespace hex {
         static std::string fileBrowserValidExtensions;
         static std::function<void(std::string)> fileBrowserCallback;
 
+        static std::vector<ContentRegistry::DataProcessorNode::Entry> dataProcessorNodes;
+        static u32 dataProcessorNodeIdCounter;
+
         static int mainArgc;
         static char **mainArgv;
 

plugins/libimhex/include/hex/plugin.hpp

@@ -9,6 +9,7 @@
 #include <hex/views/view.hpp>
 #include <hex/providers/provider.hpp>
 #include <hex/helpers/shared_data.hpp>
+#include <hex/data_processor/node.hpp>
 
 #define IMHEX_PLUGIN_SETUP      namespace hex::plugin::internal {               \
                                     void initializePlugin();                    \

plugins/libimhex/include/hex/providers/overlay.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <hex.hpp>
+
+#include <vector>
+
+namespace hex::prv {
+
+    class Overlay {
+    public:
+        Overlay() { }
+
+        void setAddress(u64 address) { this->m_address = address; }
+        [[nodiscard]] u64 getAddress() const { return this->m_address; }
+
+        [[nodiscard]] u64 getSize() const { return this->m_data.size(); }
+        [[nodiscard]] std::vector<u8>& getData() { return this->m_data; }
+
+    private:
+        u64 m_address = 0;
+        std::vector<u8> m_data;
+    };
+
+}

plugins/libimhex/include/hex/providers/provider.hpp

@@ -8,6 +8,7 @@
 #include <vector>
 
 #include <hex/helpers/shared_data.hpp>
+#include <hex/providers/overlay.hpp>
 
 namespace hex::prv {
 
@@ -32,6 +33,10 @@ namespace hex::prv {
         std::map<u64, u8>& getPatches();
         void applyPatches();
 
+        [[nodiscard]] Overlay* newOverlay();
+        void deleteOverlay(Overlay *overlay);
+        [[nodiscard]] const std::list<Overlay*>& getOverlays();
+
         u32 getPageCount();
         u32 getCurrentPage() const;
         void setCurrentPage(u32 page);
@@ -48,6 +53,7 @@ namespace hex::prv {
         u64 m_baseAddress = 0;
 
         std::vector<std::map<u64, u8>> m_patches;
+        std::list<Overlay*> m_overlays;
     };
 
 }

plugins/libimhex/source/api/content_registry.cpp

@@ -88,11 +88,7 @@ namespace hex {
     /* Views */
 
     View* ContentRegistry::Views::add(View *view) {
-        auto &views = getEntries();
+        return getEntries().emplace_back(view);
-
-        views.push_back(view);
-
-        return views.back();
     }
 
     std::vector<View*>& ContentRegistry::Views::getEntries() {
@@ -114,10 +110,24 @@ namespace hex {
     /* Data Inspector */
 
     void ContentRegistry::DataInspector::add(std::string_view name, size_t requiredSize, ContentRegistry::DataInspector::GeneratorFunction function) {
-        getEntries().push_back(Entry{ name.data(), requiredSize, function });
+        getEntries().push_back({ name.data(), requiredSize, std::move(function) });
     }
 
     std::vector<ContentRegistry::DataInspector::Entry>& ContentRegistry::DataInspector::getEntries() {
         return SharedData::dataInspectorEntries;
     }
+
+    /* Data Processor Nodes */
+
+    void ContentRegistry::DataProcessorNode::add(const Entry &entry) {
+        getEntries().push_back(entry);
+    }
+
+    void ContentRegistry::DataProcessorNode::addSeparator() {
+        getEntries().push_back({ "", "", []{ return nullptr; } });
+    }
+
+    std::vector<ContentRegistry::DataProcessorNode::Entry>& ContentRegistry::DataProcessorNode::getEntries() {
+        return SharedData::dataProcessorNodes;
+    }
 }

plugins/libimhex/source/helpers/shared_data.cpp

@@ -24,6 +24,9 @@ namespace hex {
     std::string SharedData::fileBrowserValidExtensions;
     std::function<void(std::string)> SharedData::fileBrowserCallback;
 
+    std::vector<ContentRegistry::DataProcessorNode::Entry> SharedData::dataProcessorNodes;
+    u32 SharedData::dataProcessorNodeIdCounter = 1;
+
     int SharedData::mainArgc;
     char **SharedData::mainArgv;
 

plugins/libimhex/source/providers/provider.cpp

@@ -32,6 +32,21 @@ namespace hex::prv {
             this->writeRaw(patchAddress, &patch, 1);
     }
 
+
+    Overlay* Provider::newOverlay() {
+        return this->m_overlays.emplace_back(new Overlay());
+    }
+
+    void Provider::deleteOverlay(Overlay *overlay) {
+        this->m_overlays.erase(std::find(this->m_overlays.begin(), this->m_overlays.end(), overlay));
+        delete overlay;
+    }
+
+    const std::list<Overlay*>& Provider::getOverlays() {
+        return this->m_overlays;
+    }
+
+
     u32 Provider::getPageCount() {
         return std::ceil(this->getActualSize() / double(PageSize));
     }

source/main.cpp

@@ -19,6 +19,7 @@
 #include "views/view_patches.hpp"
 #include "views/view_command_palette.hpp"
 #include "views/view_settings.hpp"
+#include "views/view_data_processor.hpp"
 
 #include <vector>
 
@@ -45,6 +46,7 @@ int main(int argc, char **argv) {
     ContentRegistry::Views::add<ViewCommandPalette>();
     ContentRegistry::Views::add<ViewHelp>();
     ContentRegistry::Views::add<ViewSettings>();
+    ContentRegistry::Views::add<ViewDataProcessor>();
 
     if (argc > 1)
         View::postEvent(Events::FileDropped, argv[1]);

source/views/view_data_processor.cpp

@@ -0,0 +1,292 @@
+#include "views/view_data_processor.hpp"
+
+#include <hex/providers/provider.hpp>
+
+#include <imnodes.h>
+
+namespace hex {
+
+    ViewDataProcessor::ViewDataProcessor() : View("Data Processor") {
+        imnodes::Initialize();
+
+        View::subscribeEvent(Events::SettingsChanged, [this](auto) {
+            int theme = ContentRegistry::Settings::getSettingsData()["Interface"]["Color theme"];
+
+            switch (theme) {
+                default:
+                case 0: /* Dark theme */
+                    imnodes::StyleColorsDark();
+                    break;
+                case 1: /* Light theme */
+                    imnodes::StyleColorsLight();
+                    break;
+                case 2: /* Classic theme */
+                    imnodes::StyleColorsClassic();
+                    break;
+            }
+
+            imnodes::GetStyle().flags = imnodes::StyleFlags(imnodes::StyleFlags_NodeOutline | imnodes::StyleFlags_GridLines);
+        });
+    }
+
+    ViewDataProcessor::~ViewDataProcessor() {
+        for (auto &node : this->m_nodes)
+            delete node;
+
+        imnodes::Shutdown();
+    }
+
+
+    void ViewDataProcessor::eraseLink(u32 id) {
+        auto link = std::find_if(this->m_links.begin(), this->m_links.end(), [&id](auto link){ return link.getID() == id; });
+
+        if (link == this->m_links.end())
+            return;
+
+        for (auto &node : this->m_nodes) {
+            for (auto &attribute : node->getAttributes()) {
+                attribute.removeConnectedAttribute(id);
+            }
+        }
+
+        this->m_links.erase(link);
+    }
+
+    void ViewDataProcessor::eraseNodes(const std::vector<int> &ids) {
+        for (const int id : ids) {
+            auto node = std::find_if(this->m_nodes.begin(), this->m_nodes.end(), [&id](auto node){ return node->getID() == id; });
+
+            for (auto &attr : (*node)->getAttributes()) {
+                std::vector<u32> linksToRemove;
+                for (auto &[linkId, connectedAttr] : attr.getConnectedAttributes())
+                    linksToRemove.push_back(linkId);
+
+                for (auto linkId : linksToRemove)
+                    eraseLink(linkId);
+            }
+        }
+
+        for (const int id : ids) {
+            auto node = std::find_if(this->m_nodes.begin(), this->m_nodes.end(), [&id](auto node){ return node->getID() == id; });
+
+            std::erase_if(this->m_endNodes, [&id](auto node){ return node->getID() == id; });
+
+            delete *node;
+
+            this->m_nodes.erase(node);
+        }
+    }
+
+    void ViewDataProcessor::processNodes() {
+        if (this->m_dataOverlays.size() != this->m_endNodes.size()) {
+            for (auto overlay : this->m_dataOverlays)
+                SharedData::currentProvider->deleteOverlay(overlay);
+            this->m_dataOverlays.clear();
+
+            for (u32 i = 0; i < this->m_endNodes.size(); i++)
+                this->m_dataOverlays.push_back(SharedData::currentProvider->newOverlay());
+        }
+
+        u32 overlayIndex = 0;
+        for (auto &endNode : this->m_endNodes) {
+            (void)endNode->process(this->m_dataOverlays[overlayIndex]);
+            overlayIndex++;
+        }
+    }
+
+    void ViewDataProcessor::drawContent() {
+        if (ImGui::Begin("Data Processor", &this->getWindowOpenState(), ImGuiWindowFlags_NoCollapse)) {
+
+            if (ImGui::IsMouseReleased(ImGuiMouseButton_Right) && ImGui::IsWindowHovered(ImGuiHoveredFlags_ChildWindows)) {
+                this->m_rightClickedCoords = ImGui::GetMousePos();
+
+                if (imnodes::IsNodeHovered(&this->m_rightClickedId))
+                    ImGui::OpenPopup("Node Menu");
+                else if (imnodes::IsLinkHovered(&this->m_rightClickedId))
+                    ImGui::OpenPopup("Link Menu");
+                else
+                    ImGui::OpenPopup("Context Menu");
+            }
+
+            if (ImGui::BeginPopup("Context Menu")) {
+                dp::Node *node = nullptr;
+
+                if (imnodes::NumSelectedNodes() > 0 || imnodes::NumSelectedLinks() > 0) {
+                    if (ImGui::MenuItem("Remove selected")) {
+                        std::vector<int> ids;
+                        ids.resize(imnodes::NumSelectedNodes());
+                        imnodes::GetSelectedNodes(ids.data());
+
+                        this->eraseNodes(ids);
+                        imnodes::ClearNodeSelection();
+
+                        ids.resize(imnodes::NumSelectedLinks());
+                        imnodes::GetSelectedLinks(ids.data());
+
+                        for (auto id : ids)
+                            this->eraseLink(id);
+                        imnodes::ClearLinkSelection();
+                    }
+                }
+
+                for (const auto &[category, name, function] : ContentRegistry::DataProcessorNode::getEntries()) {
+                    if (category.empty() && name.empty()) {
+                        ImGui::Separator();
+                    } else if (category.empty()) {
+                        if (ImGui::MenuItem(name.c_str())) {
+                            node = function();
+                        }
+                    } else {
+                        if (ImGui::BeginMenu(category.c_str())) {
+                            if (ImGui::MenuItem(name.c_str())) {
+                                node = function();
+                            }
+                            ImGui::EndMenu();
+                        }
+                    }
+                }
+
+                if (node != nullptr) {
+                    this->m_nodes.push_back(node);
+
+                    bool hasOutput = false;
+                    for (auto &attr : node->getAttributes()) {
+                        if (attr.getIOType() == dp::Attribute::IOType::Out)
+                            hasOutput = true;
+                    }
+
+                    if (!hasOutput)
+                        this->m_endNodes.push_back(node);
+
+                    imnodes::SetNodeScreenSpacePos(node->getID(), this->m_rightClickedCoords);
+                }
+
+                ImGui::EndPopup();
+            }
+
+            if (ImGui::BeginPopup("Node Menu")) {
+                if (ImGui::MenuItem("Remove Node"))
+                    this->eraseNodes({ this->m_rightClickedId });
+
+                ImGui::EndPopup();
+            }
+
+            if (ImGui::BeginPopup("Link Menu")) {
+                if (ImGui::MenuItem("Remove Link"))
+                    this->eraseLink(this->m_rightClickedId);
+
+                ImGui::EndPopup();
+            }
+
+            imnodes::BeginNodeEditor();
+
+            for (auto& node : this->m_nodes) {
+                imnodes::BeginNode(node->getID());
+
+                imnodes::BeginNodeTitleBar();
+                ImGui::TextUnformatted(node->getTitle().data());
+                imnodes::EndNodeTitleBar();
+
+                node->drawNode();
+
+                for (auto& attribute : node->getAttributes()) {
+                    imnodes::PinShape pinShape;
+
+                    switch (attribute.getType()) {
+                        case dp::Attribute::Type::Integer: pinShape = imnodes::PinShape_Circle; break;
+                        case dp::Attribute::Type::Float: pinShape = imnodes::PinShape_Triangle; break;
+                        case dp::Attribute::Type::Buffer: pinShape = imnodes::PinShape_Quad; break;
+                    }
+
+                    if (attribute.getIOType() == dp::Attribute::IOType::In) {
+                        imnodes::BeginInputAttribute(attribute.getID(), pinShape);
+                        ImGui::TextUnformatted(attribute.getName().data());
+                        imnodes::EndInputAttribute();
+                    } else if (attribute.getIOType() == dp::Attribute::IOType::Out) {
+                        imnodes::BeginOutputAttribute(attribute.getID(), imnodes::PinShape(pinShape + 1));
+                        ImGui::TextUnformatted(attribute.getName().data());
+                        imnodes::EndOutputAttribute();
+                    }
+                }
+
+                imnodes::EndNode();
+            }
+
+            for (const auto &link : this->m_links)
+                imnodes::Link(link.getID(), link.getFromID(), link.getToID());
+
+            imnodes::EndNodeEditor();
+
+            {
+                int from, to;
+                if (imnodes::IsLinkCreated(&from, &to)) {
+
+                    do {
+                        dp::Attribute *fromAttr, *toAttr;
+                        for (auto &node : this->m_nodes) {
+                            for (auto &attribute : node->getAttributes()) {
+                                if (attribute.getID() == from)
+                                    fromAttr = &attribute;
+                                else if (attribute.getID() == to)
+                                    toAttr = &attribute;
+                            }
+                        }
+
+                        if (fromAttr == nullptr || toAttr == nullptr)
+                            break;
+
+                        if (fromAttr->getType() != toAttr->getType())
+                            break;
+
+                        if (fromAttr->getIOType() == toAttr->getIOType())
+                            break;
+
+                        if (!toAttr->getConnectedAttributes().empty())
+                            break;
+
+                        auto newLink = this->m_links.emplace_back(from, to);
+
+                        fromAttr->addConnectedAttribute(newLink.getID(), toAttr);
+                        toAttr->addConnectedAttribute(newLink.getID(), fromAttr);
+                    } while (false);
+
+                }
+            }
+
+            {
+                const int selectedLinkCount = imnodes::NumSelectedLinks();
+                if (selectedLinkCount > 0 && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Delete))) {
+                    static std::vector<int> selectedLinks;
+                    selectedLinks.resize(static_cast<size_t>(selectedLinkCount));
+                    imnodes::GetSelectedLinks(selectedLinks.data());
+
+                    for (const int id : selectedLinks) {
+                        eraseLink(id);
+                    }
+
+                }
+            }
+
+            {
+                const int selectedNodeCount = imnodes::NumSelectedNodes();
+                if (selectedNodeCount > 0 && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Delete))) {
+                    static std::vector<int> selectedNodes;
+                    selectedNodes.resize(static_cast<size_t>(selectedNodeCount));
+                    imnodes::GetSelectedNodes(selectedNodes.data());
+
+                    this->eraseNodes(selectedNodes);
+
+                }
+            }
+
+            this->processNodes();
+
+        }
+        ImGui::End();
+    }
+
+    void ViewDataProcessor::drawMenu() {
+
+    }
+
+}

source/views/view_hexeditor.cpp

@@ -27,6 +27,12 @@ namespace hex {
             ImU8 byte;
             provider->read(off, &byte, sizeof(ImU8));
 
+            for (auto &overlay : SharedData::currentProvider->getOverlays()) {
+                auto overlayAddress = overlay->getAddress();
+                if (off >= overlayAddress && off < overlayAddress + overlay->getSize())
+                    byte = overlay->getData()[off - overlayAddress];
+            }
+
             return byte;
         };
 
@@ -159,7 +165,7 @@ namespace hex {
         if (dataSize != 0x00) {
             if (ImGui::Begin("Hex Editor")) {
 
-                if (ImGui::IsMouseClicked(ImGuiMouseButton_Right) && ImGui::IsWindowHovered(ImGuiHoveredFlags_ChildWindows))
+                if (ImGui::IsMouseReleased(ImGuiMouseButton_Right) && ImGui::IsWindowHovered(ImGuiHoveredFlags_ChildWindows))
                     ImGui::OpenPopup("Edit");
 
                 if (ImGui::BeginPopup("Edit")) {

source/views/view_pattern.cpp

@@ -172,11 +172,7 @@ namespace hex {
         /* Settings */
         {
 
-            constexpr auto SettingsCategoryInterface    = "Interface";
+            ContentRegistry::Settings::add("Interface", "Color theme", 0, [](nlohmann::json &setting) {
-
-            constexpr auto SettingColorTheme            = "Color theme";
-
-            ContentRegistry::Settings::add(SettingsCategoryInterface, SettingColorTheme, 0, [](nlohmann::json &setting) {
                 static int selection = setting;
                 if (ImGui::Combo("##nolabel", &selection, "Dark\0Light\0Classic\0")) {
                     setting = selection;
@@ -187,7 +183,7 @@ namespace hex {
             });
 
             View::subscribeEvent(Events::SettingsChanged, [this](auto) {
-                int theme = ContentRegistry::Settings::getSettingsData()[SettingsCategoryInterface][SettingColorTheme];
+                int theme = ContentRegistry::Settings::getSettingsData()["Interface"]["Color theme"];
 
                 switch (theme) {
                     default: