feat: Added Minimap to Hex Editor

plugins/builtin/source/content/minimap_visualizers.cpp

@@ -0,0 +1,57 @@
+#include <hex/api/content_registry.hpp>
+
+#include <imgui.h>
+#include <hex/ui/imgui_imhex_extensions.h>
+
+#include <hex/helpers/utils.hpp>
+
+#include <wolv/utils/string.hpp>
+
+
+namespace hex::plugin::builtin {
+
+    namespace {
+
+        ImColor entropyMiniMapVisualizer(const std::vector<u8> &data) {
+            std::array<u32, 256> frequencies = { 0 };
+            for (u8 byte : data)
+                frequencies[byte]++;
+
+            double entropy = 0.0;
+            for (u32 frequency : frequencies) {
+                if (frequency == 0)
+                    continue;
+
+                double probability = static_cast<double>(frequency) / data.size();
+                entropy -= probability * std::log2(probability);
+            }
+
+            // Calculate color
+            ImColor color = ImColor::HSV(0.0F, 0.0F, 1.0F);
+
+            if (entropy > 0.0) {
+                double hue = std::clamp(entropy / 8.0, 0.0, 1.0);
+                color = ImColor::HSV(static_cast<float>(hue) / 0.75F, 0.8F, 1.0F);
+            }
+
+            return color;
+        }
+
+        ImColor zerosMiniMapVisualizer(const std::vector<u8> &data) {
+            u32 zerosCount = 0;
+            for (u8 byte : data) {
+                if (byte == 0x00)
+                    zerosCount++;
+            }
+
+            return ImColor::HSV(0.0F, 0.0F, 1.0F - (double(zerosCount) / data.size()));
+        }
+
+    }
+
+    void registerMiniMapVisualizers() {
+        ContentRegistry::HexEditor::addMiniMapVisualizer("hex.builtin.minimap_visualizer.entropy", entropyMiniMapVisualizer);
+        ContentRegistry::HexEditor::addMiniMapVisualizer("hex.builtin.minimap_visualizer.zeros", zerosMiniMapVisualizer);
+    }
+
+}

plugins/builtin/source/plugin_builtin.cpp

@@ -14,6 +14,7 @@ namespace hex::plugin::builtin {
 
     void registerEventHandlers();
     void registerDataVisualizers();
+    void registerMiniMapVisualizers();
     void registerDataInspectorEntries();
     void registerToolEntries();
     void registerPatternLanguageFunctions();
@@ -86,6 +87,7 @@ IMHEX_PLUGIN_SETUP("Built-in", "WerWolv", "Default ImHex functionality") {
 
     registerEventHandlers();
     registerDataVisualizers();
+    registerMiniMapVisualizers();
     registerDataInspectorEntries();
     registerToolEntries();
     registerPatternLanguageFunctions();