new modole system

core/src/imgui/imgui_plot.h

@@ -0,0 +1,75 @@
+#pragma once
+#include <cstdint>
+#include <imgui.h>
+
+namespace ImGui {
+// Use this structure to pass the plot data and settings into the Plot function
+struct PlotConfig {
+    struct Values {
+        // if necessary, you can provide x-axis values
+        const float *xs = nullptr;
+        // array of y values. If null, use ys_list (below)
+        const float *ys = nullptr;
+        // the number of values in each array
+        int count;
+        // at which offset to start plotting.
+        // Warning: count+offset must be <= length of array!
+        int offset = 0;
+        // Plot color. If 0, use ImGuiCol_PlotLines.
+        ImU32 color = 0;
+
+        // in case you need to draw multiple plots at once, use this instead of ys
+        const float **ys_list = nullptr;
+        // the number of plots to draw
+        int ys_count = 0;
+        // colors for each plot
+        const ImU32* colors = nullptr;
+    } values;
+    struct Scale {
+        // Minimum plot value
+        float min;
+        // Maximum plot value
+        float max;
+        enum Type {
+            Linear,
+            Log10,
+        };
+        // How to scale the x-axis
+        Type type = Linear;
+    } scale;
+    struct Tooltip {
+        bool show = false;
+        const char* format = "%g: %8.4g";
+    } tooltip;
+    struct Grid {
+        bool show = false;
+        float size = 100; // at which intervals to draw the grid
+        int subticks = 10; // how many subticks in each tick
+    } grid_x, grid_y;
+    struct Selection {
+        bool show = false;
+        uint32_t* start = nullptr;
+        uint32_t* length = nullptr;
+        // "Sanitize" function. Give it selection length, and it will return
+        // the "allowed" length. Useful for FFT, where selection must be
+        // of power of two
+        uint32_t(*sanitize_fn)(uint32_t) = nullptr;
+    } selection;
+    struct VerticalLines {
+        bool show = false;
+        const size_t* indices = nullptr; // at which indices to draw the lines
+        size_t count = 0;
+    } v_lines;
+    ImVec2 frame_size = ImVec2(0.f, 0.f);
+    float line_thickness = 1.f;
+    bool skip_small_lines = true;
+    const char* overlay_text = nullptr;
+};
+
+enum class PlotStatus {
+    nothing,
+    selection_updated,
+};
+
+IMGUI_API PlotStatus Plot(const char* label, const PlotConfig& conf);
+}