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imgui/imgui.h
ocornut c51be42f28 Added Bullet() + usage examples
2015-02-23 20:59:22 +00:00

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// ImGui library v1.34 wip
// See .cpp file for documentation.
// See ImGui::ShowTestWindow() for sample code.
// Read 'Programmer guide' in .cpp for notes on how to setup ImGui in your codebase.
// Get latest version at https://github.com/ocornut/imgui
#pragma once
struct ImDrawCmd;
struct ImDrawList;
struct ImFont;
struct ImFontAtlas;
struct ImGuiAabb;
struct ImGuiIO;
struct ImGuiStorage;
struct ImGuiStyle;
struct ImGuiWindow;
#include "imconfig.h"
#include <float.h> // FLT_MAX
#include <stdarg.h> // va_list
#include <stddef.h> // ptrdiff_t
#include <stdlib.h> // NULL, malloc
#include <string.h> // memset, memmove
#ifndef IM_ASSERT
#include <assert.h>
#define IM_ASSERT(_EXPR) assert(_EXPR)
#endif
#ifndef IMGUI_API
#define IMGUI_API
#endif
typedef unsigned int ImU32;
typedef unsigned short ImWchar; // character for display
typedef void* ImTextureID; // user data to refer to a texture (e.g. store your texture handle/id)
typedef ImU32 ImGuiID; // unique ID used by widgets (typically hashed from a stack of string)
typedef int ImGuiCol; // enum ImGuiCol_
typedef int ImGuiStyleVar; // enum ImGuiStyleVar_
typedef int ImGuiKey; // enum ImGuiKey_
typedef int ImGuiColorEditMode; // enum ImGuiColorEditMode_
typedef int ImGuiWindowFlags; // enum ImGuiWindowFlags_
typedef int ImGuiSetCondition; // enum ImGuiSetCondition_
typedef int ImGuiInputTextFlags; // enum ImGuiInputTextFlags_
struct ImGuiTextEditCallbackData; // for advanced uses of InputText()
typedef int (*ImGuiTextEditCallback)(ImGuiTextEditCallbackData *data);
struct ImVec2
{
float x, y;
ImVec2() {}
ImVec2(float _x, float _y) { x = _x; y = _y; }
#ifdef IM_VEC2_CLASS_EXTRA
IM_VEC2_CLASS_EXTRA
#endif
};
struct ImVec4
{
float x, y, z, w;
ImVec4() {}
ImVec4(float _x, float _y, float _z, float _w) { x = _x; y = _y; z = _z; w = _w; }
#ifdef IM_VEC4_CLASS_EXTRA
IM_VEC4_CLASS_EXTRA
#endif
};
namespace ImGui
{
// Proxy functions to access the MemAllocFn/MemFreeFn pointers in ImGui::GetIO(). The only reason they exist here is to allow ImVector<> to compile inline.
IMGUI_API void* MemAlloc(size_t sz);
IMGUI_API void MemFree(void* ptr);
}
// std::vector<> like class to avoid dragging dependencies (also: windows implementation of STL with debug enabled is absurdly slow, so let's bypass it so our code runs fast in debug).
// Use '#define ImVector std::vector' if you want to use the STL type or your own type.
// Our implementation does NOT call c++ constructors! because the data types we use don't need them (but that could be added as well). Only provide the minimum functionalities we need.
#ifndef ImVector
template<typename T>
class ImVector
{
protected:
size_t Size;
size_t Capacity;
T* Data;
public:
typedef T value_type;
typedef value_type* iterator;
typedef const value_type* const_iterator;
ImVector() { Size = Capacity = 0; Data = NULL; }
~ImVector() { if (Data) ImGui::MemFree(Data); }
inline bool empty() const { return Size == 0; }
inline size_t size() const { return Size; }
inline size_t capacity() const { return Capacity; }
inline value_type& at(size_t i) { IM_ASSERT(i < Size); return Data[i]; }
inline const value_type& at(size_t i) const { IM_ASSERT(i < Size); return Data[i]; }
inline value_type& operator[](size_t i) { IM_ASSERT(i < Size); return Data[i]; }
inline const value_type& operator[](size_t i) const { IM_ASSERT(i < Size); return Data[i]; }
inline void clear() { if (Data) { Size = Capacity = 0; ImGui::MemFree(Data); Data = NULL; } }
inline iterator begin() { return Data; }
inline const_iterator begin() const { return Data; }
inline iterator end() { return Data + Size; }
inline const_iterator end() const { return Data + Size; }
inline value_type& front() { IM_ASSERT(Size > 0); return Data[0]; }
inline const value_type& front() const { IM_ASSERT(Size > 0); return Data[0]; }
inline value_type& back() { IM_ASSERT(Size > 0); return Data[Size-1]; }
inline const value_type& back() const { IM_ASSERT(Size > 0); return Data[Size-1]; }
inline void swap(ImVector<T>& rhs) { const size_t rhs_size = rhs.Size; rhs.Size = Size; Size = rhs_size; const size_t rhs_cap = rhs.Capacity; rhs.Capacity = Capacity; Capacity = rhs_cap; value_type* rhs_data = rhs.Data; rhs.Data = Data; Data = rhs_data; }
inline void resize(size_t new_size) { if (new_size > Capacity) reserve(new_size); Size = new_size; }
inline void reserve(size_t new_capacity)
{
if (new_capacity <= Capacity) return;
T* new_data = (value_type*)ImGui::MemAlloc(new_capacity * sizeof(value_type));
memcpy(new_data, Data, Size * sizeof(value_type));
ImGui::MemFree(Data);
Data = new_data;
Capacity = new_capacity;
}
inline void push_back(const value_type& v) { if (Size == Capacity) reserve(Capacity ? Capacity * 2 : 4); Data[Size++] = v; }
inline void pop_back() { IM_ASSERT(Size > 0); Size--; }
inline iterator erase(const_iterator it) { IM_ASSERT(it >= begin() && it < end()); const ptrdiff_t off = it - begin(); memmove(Data + off, Data + off + 1, (Size - (size_t)off - 1) * sizeof(value_type)); Size--; return Data + off; }
inline iterator insert(const_iterator it, const value_type& v) { IM_ASSERT(it >= begin() && it <= end()); const ptrdiff_t off = it - begin(); if (Size == Capacity) reserve(Capacity ? Capacity * 2 : 4); if (off < (int)Size) memmove(Data + off + 1, Data + off, (Size - (size_t)off) * sizeof(value_type)); Data[off] = v; Size++; return Data + off; }
};
#endif // #ifndef ImVector
// Helpers at bottom of the file:
// - IMGUI_ONCE_UPON_A_FRAME // Execute a block of code once per frame only (convenient for creating UI within deep-nested code that runs multiple times)
// - struct ImGuiTextFilter // Parse and apply text filters. In format "aaaaa[,bbbb][,ccccc]"
// - struct ImGuiTextBuffer // Text buffer for logging/accumulating text
// - struct ImGuiStorage // Custom key value storage (if you need to alter open/close states manually)
// - struct ImDrawList // Draw command list
// - struct ImFont // TTF font loader, bake glyphs into bitmap
// ImGui end-user API
// In a namespace so that user can add extra functions (e.g. Value() helpers for your vector or common types)
namespace ImGui
{
// Main
IMGUI_API ImGuiIO& GetIO();
IMGUI_API ImGuiStyle& GetStyle();
IMGUI_API void NewFrame();
IMGUI_API void Render();
IMGUI_API void Shutdown();
IMGUI_API void ShowUserGuide();
IMGUI_API void ShowStyleEditor(ImGuiStyle* ref = NULL);
IMGUI_API void ShowTestWindow(bool* open = NULL);
// Window
// See implementation in .cpp for details
IMGUI_API bool Begin(const char* name = "Debug", bool* p_opened = NULL, const ImVec2& initial_size = ImVec2(0,0), float bg_alpha = -1.0f, ImGuiWindowFlags flags = 0); // return false when window is collapsed, so you can early out in your code. passing 'bool* p_opened' displays a Close button on the upper-right corner of the window, the pointed value will be set to false when the button is pressed.
IMGUI_API void End();
IMGUI_API bool BeginChild(const char* str_id, const ImVec2& size = ImVec2(0,0), bool border = false, ImGuiWindowFlags extra_flags = 0); // size==0.0f: use remaining window size, size<0.0f: use remaining window size minus abs(size). on each axis.
IMGUI_API bool BeginChild(ImGuiID id, const ImVec2& size = ImVec2(0,0), bool border = false, ImGuiWindowFlags extra_flags = 0); // "
IMGUI_API void EndChild();
IMGUI_API bool GetWindowIsFocused();
IMGUI_API ImVec2 GetContentRegionMax(); // window or current column boundaries, in windows coordinates
IMGUI_API ImVec2 GetWindowContentRegionMin(); // window boundaries, in windows coordinates
IMGUI_API ImVec2 GetWindowContentRegionMax();
IMGUI_API ImDrawList* GetWindowDrawList(); // get rendering command-list if you want to append your own draw primitives.
IMGUI_API ImFont* GetWindowFont();
IMGUI_API float GetWindowFontSize(); // size (also height in pixels) of current font with current scale applied
IMGUI_API void SetWindowFontScale(float scale); // per-window font scale. Adjust IO.FontGlobalScale if you want to scale all windows.
IMGUI_API ImVec2 GetWindowPos(); // you should rarely need/care about the window position, but it can be useful if you want to do your own drawing.
IMGUI_API ImVec2 GetWindowSize(); // get current window position.
IMGUI_API float GetWindowWidth();
IMGUI_API bool GetWindowCollapsed();
IMGUI_API void SetNextWindowPos(const ImVec2& pos, ImGuiSetCondition cond = 0); // set next window position - call before Begin().
IMGUI_API void SetNextWindowSize(const ImVec2& size, ImGuiSetCondition cond = 0); // set next window size. set to ImVec2(0,0) to force an auto-fit.
IMGUI_API void SetNextWindowCollapsed(bool collapsed, ImGuiSetCondition cond = 0); // set next window collapsed state.
IMGUI_API void SetWindowPos(const ImVec2& pos, ImGuiSetCondition cond = 0); // set current window position - call within Begin()/End(). may incur tearing.
IMGUI_API void SetWindowSize(const ImVec2& size, ImGuiSetCondition cond = 0); // set current window size. set to ImVec2(0,0) to force an auto-fit. may incur tearing.
IMGUI_API void SetWindowCollapsed(bool collapsed, ImGuiSetCondition cond = 0); // set current window collapsed state.
IMGUI_API void SetScrollPosHere(); // adjust scrolling position to center into the current cursor position.
IMGUI_API void SetKeyboardFocusHere(int offset = 0); // focus keyboard on the next widget. Use positive 'offset' to access sub components of a multiple component widget.
IMGUI_API void SetStateStorage(ImGuiStorage* tree); // replace tree state storage with our own (if you want to manipulate it yourself, typically clear subsection of it).
IMGUI_API ImGuiStorage* GetStateStorage();
// Parameters stacks (shared)
IMGUI_API void PushFont(ImFont* font); // use NULL as a shortcut to push default font
IMGUI_API void PopFont();
IMGUI_API void PushStyleColor(ImGuiCol idx, const ImVec4& col);
IMGUI_API void PopStyleColor(int count = 1);
IMGUI_API void PushStyleVar(ImGuiStyleVar idx, float val);
IMGUI_API void PushStyleVar(ImGuiStyleVar idx, const ImVec2& val);
IMGUI_API void PopStyleVar(int count = 1);
// Parameters stacks (current window)
IMGUI_API void PushItemWidth(float item_width); // width of items for the common item+label case, pixels. 0.0f = default to ~2/3 of windows width, >0.0f: width in pixels, <0.0f align xx pixels to the right of window (so -0.01f always align width to the right side)
IMGUI_API void PopItemWidth();
IMGUI_API float CalcItemWidth(); // width of item given pushed settings and current cursor position
IMGUI_API void PushAllowKeyboardFocus(bool v); // allow focusing using TAB/Shift-TAB, enabled by default but you can disable it for certain widgets.
IMGUI_API void PopAllowKeyboardFocus();
IMGUI_API void PushTextWrapPos(float wrap_pos_x = 0.0f); // word-wrapping for Text*() commands. < 0.0f: no wrapping; 0.0f: wrap to end of window (or column); > 0.0f: wrap at 'wrap_pos_x' position in window local space.
IMGUI_API void PopTextWrapPos();
// Tooltip
IMGUI_API void SetTooltip(const char* fmt, ...); // set tooltip under mouse-cursor, typically use with ImGui::IsHovered(). last call wins.
IMGUI_API void SetTooltipV(const char* fmt, va_list args);
IMGUI_API void BeginTooltip(); // use to create full-featured tooltip windows that aren't just text.
IMGUI_API void EndTooltip();
// Layout
IMGUI_API void Separator(); // horizontal line
IMGUI_API void SameLine(int column_x = 0, int spacing_w = -1); // call between widgets to layout them horizontally
IMGUI_API void Spacing();
IMGUI_API void Columns(int count = 1, const char* id = NULL, bool border=true); // setup number of columns
IMGUI_API void NextColumn(); // next column
IMGUI_API float GetColumnOffset(int column_index = -1);
IMGUI_API void SetColumnOffset(int column_index, float offset);
IMGUI_API float GetColumnWidth(int column_index = -1);
IMGUI_API ImVec2 GetCursorPos(); // cursor position is relative to window position
IMGUI_API float GetCursorPosX(); // "
IMGUI_API float GetCursorPosY(); // "
IMGUI_API void SetCursorPos(const ImVec2& pos); // "
IMGUI_API void SetCursorPosX(float x); // "
IMGUI_API void SetCursorPosY(float y); // "
IMGUI_API ImVec2 GetCursorScreenPos(); // cursor position in absolute screen coordinates (0..io.DisplaySize)
IMGUI_API void SetCursorScreenPos(const ImVec2& pos); // cursor position in absolute screen coordinates (0..io.DisplaySize)
IMGUI_API void AlignFirstTextHeightToWidgets(); // call once if the first item on the line is a Text() item and you want to vertically lower it to match subsequent (bigger) widgets.
IMGUI_API float GetTextLineHeight(); // height of font == GetWindowFontSize()
IMGUI_API float GetTextLineHeightWithSpacing(); // spacing (in pixels) between 2 consecutive lines of text == GetWindowFontSize() + GetStyle().ItemSpacing.y
// ID scopes
// If you are creating widgets in a loop you most likely want to push a unique identifier so ImGui can differentiate them.
// You can also use "##extra" within your widget name to distinguish them from each others (see 'Programmer Guide')
IMGUI_API void PushID(const char* str_id); // push identifier into the ID stack. IDs are hash of the *entire* stack!
IMGUI_API void PushID(const void* ptr_id);
IMGUI_API void PushID(const int int_id);
IMGUI_API void PopID();
IMGUI_API ImGuiID GetID(const char* str_id); // calculate unique ID (hash of whole ID stack + given parameter). useful if you want to query into ImGuiStorage yourself. otherwise rarely needed.
IMGUI_API ImGuiID GetID(const void* ptr_id);
// Widgets
IMGUI_API void Text(const char* fmt, ...);
IMGUI_API void TextV(const char* fmt, va_list args);
IMGUI_API void TextColored(const ImVec4& col, const char* fmt, ...); // shortcut for PushStyleColor(ImGuiCol_Text, col); Text(fmt, ...); PopStyleColor();
IMGUI_API void TextColoredV(const ImVec4& col, const char* fmt, va_list args);
IMGUI_API void TextWrapped(const char* fmt, ...); // shortcut for PushTextWrapPos(0.0f); Text(fmt, ...); PopTextWrapPos();
IMGUI_API void TextWrappedV(const char* fmt, va_list args);
IMGUI_API void TextUnformatted(const char* text, const char* text_end = NULL); // doesn't require null terminated string if 'text_end' is specified. no copy done to any bounded stack buffer, recommended for long chunks of text.
IMGUI_API void LabelText(const char* label, const char* fmt, ...); // display text+label aligned the same way as value+label widgets
IMGUI_API void LabelTextV(const char* label, const char* fmt, va_list args);
IMGUI_API void Bullet();
IMGUI_API void BulletText(const char* fmt, ...);
IMGUI_API void BulletTextV(const char* fmt, va_list args);
IMGUI_API bool Button(const char* label, const ImVec2& size = ImVec2(0,0), bool repeat_when_held = false);
IMGUI_API bool SmallButton(const char* label);
IMGUI_API bool InvisibleButton(const char* str_id, const ImVec2& size);
IMGUI_API void Image(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0 = ImVec2(0,0), const ImVec2& uv1 = ImVec2(1,1), const ImVec4& tint_col = ImVec4(1,1,1,1), const ImVec4& border_col = ImVec4(0,0,0,0));
IMGUI_API bool ImageButton(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0 = ImVec2(0,0), const ImVec2& uv1 = ImVec2(1,1), int frame_padding = -1, const ImVec4& bg_col = ImVec4(0,0,0,1), const ImVec4& tint_col = ImVec4(1,1,1,1)); // <0 frame_padding uses default frame padding settings. 0 for no paddnig.
IMGUI_API bool CollapsingHeader(const char* label, const char* str_id = NULL, const bool display_frame = true, const bool default_open = false);
IMGUI_API bool SliderFloat(const char* label, float* v, float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f); // adjust display_format to decorate the value with a prefix or a suffix. Use power!=1.0 for logarithmic sliders.
IMGUI_API bool SliderFloat2(const char* label, float v[2], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
IMGUI_API bool SliderFloat3(const char* label, float v[3], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
IMGUI_API bool SliderFloat4(const char* label, float v[4], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
IMGUI_API bool SliderAngle(const char* label, float* v, float v_degrees_min = -360.0f, float v_degrees_max = +360.0f); // *v in radians
IMGUI_API bool SliderInt(const char* label, int* v, int v_min, int v_max, const char* display_format = "%.0f");
IMGUI_API bool SliderInt2(const char* label, int v[2], int v_min, int v_max, const char* display_format = "%.0f");
IMGUI_API bool SliderInt3(const char* label, int v[3], int v_min, int v_max, const char* display_format = "%.0f");
IMGUI_API bool SliderInt4(const char* label, int v[4], int v_min, int v_max, const char* display_format = "%.0f");
IMGUI_API void PlotLines(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), size_t stride = sizeof(float));
IMGUI_API void PlotLines(const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0));
IMGUI_API void PlotHistogram(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), size_t stride = sizeof(float));
IMGUI_API void PlotHistogram(const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0));
IMGUI_API bool Checkbox(const char* label, bool* v);
IMGUI_API bool CheckboxFlags(const char* label, unsigned int* flags, unsigned int flags_value);
IMGUI_API bool RadioButton(const char* label, bool active);
IMGUI_API bool RadioButton(const char* label, int* v, int v_button);
IMGUI_API bool InputText(const char* label, char* buf, size_t buf_size, ImGuiInputTextFlags flags = 0, ImGuiTextEditCallback callback = NULL, void* user_data = NULL);
IMGUI_API bool InputFloat(const char* label, float* v, float step = 0.0f, float step_fast = 0.0f, int decimal_precision = -1, ImGuiInputTextFlags extra_flags = 0);
IMGUI_API bool InputFloat2(const char* label, float v[2], int decimal_precision = -1);
IMGUI_API bool InputFloat3(const char* label, float v[3], int decimal_precision = -1);
IMGUI_API bool InputFloat4(const char* label, float v[4], int decimal_precision = -1);
IMGUI_API bool InputInt(const char* label, int* v, int step = 1, int step_fast = 100, ImGuiInputTextFlags extra_flags = 0);
IMGUI_API bool Combo(const char* label, int* current_item, const char** items, int items_count, int height_in_items = -1);
IMGUI_API bool Combo(const char* label, int* current_item, const char* items_separated_by_zeros, int height_in_items = -1); // separate items with \0, end item-list with \0\0
IMGUI_API bool Combo(const char* label, int* current_item, bool (*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int height_in_items = -1);
IMGUI_API bool ColorButton(const ImVec4& col, bool small_height = false, bool outline_border = true);
IMGUI_API bool ColorEdit3(const char* label, float col[3]);
IMGUI_API bool ColorEdit4(const char* label, float col[4], bool show_alpha = true);
IMGUI_API void ColorEditMode(ImGuiColorEditMode mode);
IMGUI_API bool TreeNode(const char* str_label_id); // if returning 'true' the node is open and the user is responsible for calling TreePop
IMGUI_API bool TreeNode(const char* str_id, const char* fmt, ...); // "
IMGUI_API bool TreeNode(const void* ptr_id, const char* fmt, ...); // "
IMGUI_API bool TreeNodeV(const char* str_id, const char* fmt, va_list args); // "
IMGUI_API bool TreeNodeV(const void* ptr_id, const char* fmt, va_list args); // "
IMGUI_API void TreePush(const char* str_id = NULL); // already called by TreeNode(), but you can call Push/Pop yourself for layouting purpose
IMGUI_API void TreePush(const void* ptr_id = NULL); // "
IMGUI_API void TreePop();
IMGUI_API void OpenNextNode(bool open); // force open/close the next TreeNode or CollapsingHeader
// Selectable / Lists
IMGUI_API bool Selectable(const char* label, bool selected, const ImVec2& size = ImVec2(0,0));
IMGUI_API bool Selectable(const char* label, bool* p_selected, const ImVec2& size = ImVec2(0,0));
IMGUI_API bool ListBox(const char* label, int* current_item, const char** items, int items_count, int height_in_items = -1);
IMGUI_API bool ListBox(const char* label, int* current_item, bool (*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int height_in_items = -1);
IMGUI_API bool ListBoxHeader(const char* label, const ImVec2& size = ImVec2(0,0)); // use if you want to reimplement ListBox() will custom data or interactions. make sure to call ListBoxFooter() afterwards.
IMGUI_API bool ListBoxHeader(const char* label, int items_count, int height_in_items = -1); // "
IMGUI_API void ListBoxFooter(); // terminate the scrolling region
// Value() Helpers: output single value in "name: value" format. Tip: freely declare your own within the ImGui namespace!
IMGUI_API void Value(const char* prefix, bool b);
IMGUI_API void Value(const char* prefix, int v);
IMGUI_API void Value(const char* prefix, unsigned int v);
IMGUI_API void Value(const char* prefix, float v, const char* float_format = NULL);
IMGUI_API void Color(const char* prefix, const ImVec4& v);
IMGUI_API void Color(const char* prefix, unsigned int v);
// Logging: All text output from your interface are redirected to tty/file/clipboard. Tree nodes are automatically opened.
IMGUI_API void LogToTTY(int max_depth = -1); // start logging to tty
IMGUI_API void LogToFile(int max_depth = -1, const char* filename = NULL); // start logging to file
IMGUI_API void LogToClipboard(int max_depth = -1); // start logging to OS clipboard
IMGUI_API void LogFinish(); // stop logging (close file, etc.)
IMGUI_API void LogButtons(); // helper to display buttons for logging to tty/file/clipboard
IMGUI_API void LogText(const char* fmt, ...); // pass text data straight to log (without being displayed)
// Utilities
IMGUI_API bool IsItemHovered(); // was the last item hovered by mouse?
IMGUI_API bool IsItemActive(); // was the last item active? (e.g. button being held, text field being edited- items that don't interact will always return false)
IMGUI_API bool IsAnyItemActive(); //
IMGUI_API ImVec2 GetItemBoxMin(); // get bounding box of last item
IMGUI_API ImVec2 GetItemBoxMax(); // get bounding box of last item
IMGUI_API bool IsClipped(const ImVec2& item_size); // to perform coarse clipping on user's side (as an optimization)
IMGUI_API bool IsKeyPressed(int key_index, bool repeat = true); // key_index into the keys_down[512] array, imgui doesn't know the semantic of each entry
IMGUI_API bool IsMouseClicked(int button, bool repeat = false);
IMGUI_API bool IsMouseDoubleClicked(int button);
IMGUI_API bool IsMouseHoveringWindow(); // is mouse hovering current window ("window" in API names always refer to current window)
IMGUI_API bool IsMouseHoveringAnyWindow(); // is mouse hovering any active imgui window
IMGUI_API bool IsMouseHoveringBox(const ImVec2& box_min, const ImVec2& box_max); // is mouse hovering given bounding box
IMGUI_API bool IsPosHoveringAnyWindow(const ImVec2& pos); // is given position hovering any active imgui window
IMGUI_API ImVec2 GetMousePos(); // shortcut to ImGui::GetIO().MousePos provided by user, to be consistent with other calls
IMGUI_API float GetTime();
IMGUI_API int GetFrameCount();
IMGUI_API const char* GetStyleColName(ImGuiCol idx);
IMGUI_API ImVec2 CalcTextSize(const char* text, const char* text_end = NULL, bool hide_text_after_double_hash = false, float wrap_width = -1.0f);
IMGUI_API void CalcListClipping(int items_count, float items_height, int* out_items_display_start, int* out_items_display_end); // helper to manually clip large list of items. see comments in implementation.
IMGUI_API void BeginChildFrame(ImGuiID id, const ImVec2& size); // helper to create a child window / scrolling region that looks like a normal widget frame.
IMGUI_API void EndChildFrame();
IMGUI_API ImU32 ColorConvertFloat4ToU32(const ImVec4& in);
IMGUI_API void ColorConvertRGBtoHSV(float r, float g, float b, float& out_h, float& out_s, float& out_v);
IMGUI_API void ColorConvertHSVtoRGB(float h, float s, float v, float& out_r, float& out_g, float& out_b);
// Internal state access - if you want to share ImGui state between modules (e.g. DLL) or allocate it yourself
IMGUI_API void* GetInternalState();
IMGUI_API size_t GetInternalStateSize();
IMGUI_API void SetInternalState(void* state, bool construct = false);
// Obsolete (will be removed)
IMGUI_API void GetDefaultFontData(const void** fnt_data, unsigned int* fnt_size, const void** png_data, unsigned int* png_size);
} // namespace ImGui
// Flags for ImGui::Begin()
enum ImGuiWindowFlags_
{
// Default: 0
ImGuiWindowFlags_NoTitleBar = 1 << 0, // Disable title-bar
ImGuiWindowFlags_NoResize = 1 << 1, // Disable user resizing with the lower-right grip
ImGuiWindowFlags_NoMove = 1 << 2, // Disable user moving the window
ImGuiWindowFlags_NoScrollbar = 1 << 3, // Disable scroll bar (window can still scroll with mouse or programatically)
ImGuiWindowFlags_NoScrollWithMouse = 1 << 4, // Disable user scrolling with mouse wheel
ImGuiWindowFlags_NoCollapse = 1 << 5, // Disable user collapsing window by double-clicking on it
ImGuiWindowFlags_AlwaysAutoResize = 1 << 6, // Resize every window to its content every frame
ImGuiWindowFlags_ShowBorders = 1 << 7, // Show borders around windows and items
ImGuiWindowFlags_NoSavedSettings = 1 << 8, // Never load/save settings in .ini file
// [Internal]
ImGuiWindowFlags_ChildWindow = 1 << 9, // For internal use by BeginChild()
ImGuiWindowFlags_ChildWindowAutoFitX = 1 << 10, // For internal use by BeginChild()
ImGuiWindowFlags_ChildWindowAutoFitY = 1 << 11, // For internal use by BeginChild()
ImGuiWindowFlags_ComboBox = 1 << 12, // For internal use by ComboBox()
ImGuiWindowFlags_Tooltip = 1 << 13 // For internal use by BeginTooltip()
};
// Flags for ImGui::InputText()
enum ImGuiInputTextFlags_
{
// Default: 0
ImGuiInputTextFlags_CharsDecimal = 1 << 0, // Allow 0123456789.+-*/
ImGuiInputTextFlags_CharsHexadecimal = 1 << 1, // Allow 0123456789ABCDEFabcdef
ImGuiInputTextFlags_CharsUppercase = 1 << 2, // Turn a..z into A..Z
ImGuiInputTextFlags_CharsNoBlank = 1 << 3, // Filter out spaces, tabs
ImGuiInputTextFlags_AutoSelectAll = 1 << 4, // Select entire text when first taking mouse focus
ImGuiInputTextFlags_EnterReturnsTrue = 1 << 5, // Return 'true' when Enter is pressed (as opposed to when the value was modified)
ImGuiInputTextFlags_CallbackCompletion = 1 << 6, // Call user function on pressing TAB (for completion handling)
ImGuiInputTextFlags_CallbackHistory = 1 << 7, // Call user function on pressing Up/Down arrows (for history handling)
ImGuiInputTextFlags_CallbackAlways = 1 << 8, // Call user function every time
ImGuiInputTextFlags_CallbackCharFilter = 1 << 9 // Call user function to filter character. Modify data->EventChar to replace/filter input, or return 1 to discard character.
};
// User fill ImGuiIO.KeyMap[] array with indices into the ImGuiIO.KeysDown[512] array
enum ImGuiKey_
{
ImGuiKey_Tab,
ImGuiKey_LeftArrow,
ImGuiKey_RightArrow,
ImGuiKey_UpArrow,
ImGuiKey_DownArrow,
ImGuiKey_Home,
ImGuiKey_End,
ImGuiKey_Delete,
ImGuiKey_Backspace,
ImGuiKey_Enter,
ImGuiKey_Escape,
ImGuiKey_A, // for CTRL+A: select all
ImGuiKey_C, // for CTRL+C: copy
ImGuiKey_V, // for CTRL+V: paste
ImGuiKey_X, // for CTRL+X: cut
ImGuiKey_Y, // for CTRL+Y: redo
ImGuiKey_Z, // for CTRL+Z: undo
ImGuiKey_COUNT
};
// Enumeration for PushStyleColor() / PopStyleColor()
enum ImGuiCol_
{
ImGuiCol_Text,
ImGuiCol_WindowBg,
ImGuiCol_ChildWindowBg,
ImGuiCol_Border,
ImGuiCol_BorderShadow,
ImGuiCol_FrameBg, // Background of checkbox, radio button, plot, slider, text input
ImGuiCol_TitleBg,
ImGuiCol_TitleBgCollapsed,
ImGuiCol_ScrollbarBg,
ImGuiCol_ScrollbarGrab,
ImGuiCol_ScrollbarGrabHovered,
ImGuiCol_ScrollbarGrabActive,
ImGuiCol_ComboBg,
ImGuiCol_CheckHovered,
ImGuiCol_CheckActive,
ImGuiCol_CheckMark,
ImGuiCol_SliderGrab,
ImGuiCol_SliderGrabActive,
ImGuiCol_Button,
ImGuiCol_ButtonHovered,
ImGuiCol_ButtonActive,
ImGuiCol_Header,
ImGuiCol_HeaderHovered,
ImGuiCol_HeaderActive,
ImGuiCol_Column,
ImGuiCol_ColumnHovered,
ImGuiCol_ColumnActive,
ImGuiCol_ResizeGrip,
ImGuiCol_ResizeGripHovered,
ImGuiCol_ResizeGripActive,
ImGuiCol_CloseButton,
ImGuiCol_CloseButtonHovered,
ImGuiCol_CloseButtonActive,
ImGuiCol_PlotLines,
ImGuiCol_PlotLinesHovered,
ImGuiCol_PlotHistogram,
ImGuiCol_PlotHistogramHovered,
ImGuiCol_TextSelectedBg,
ImGuiCol_TooltipBg,
ImGuiCol_COUNT
};
// Enumeration for PushStyleVar() / PopStyleVar()
// NB: the enum only refers to fields of ImGuiStyle() which makes sense to be pushed/poped in UI code. Feel free to add others.
enum ImGuiStyleVar_
{
ImGuiStyleVar_Alpha, // float
ImGuiStyleVar_WindowPadding, // ImVec2
ImGuiStyleVar_WindowRounding, // float
ImGuiStyleVar_ChildWindowRounding, // float
ImGuiStyleVar_FramePadding, // ImVec2
ImGuiStyleVar_FrameRounding, // float
ImGuiStyleVar_ItemSpacing, // ImVec2
ImGuiStyleVar_ItemInnerSpacing, // ImVec2
ImGuiStyleVar_TreeNodeSpacing // float
};
// Enumeration for ColorEditMode()
enum ImGuiColorEditMode_
{
ImGuiColorEditMode_UserSelect = -2,
ImGuiColorEditMode_UserSelectShowButton = -1,
ImGuiColorEditMode_RGB = 0,
ImGuiColorEditMode_HSV = 1,
ImGuiColorEditMode_HEX = 2
};
// Condition flags for ImGui::SetWindow***() and SetNextWindow***() functions
// Those functions treat 0 as a shortcut to ImGuiSetCondition_Always
enum ImGuiSetCondition_
{
ImGuiSetCondition_Always = 1 << 0, // Set the variable
ImGuiSetCondition_FirstUseThisSession = 1 << 1, // Only set the variable on the first call per runtime session
ImGuiSetCondition_FirstUseEver = 1 << 2 // Only set the variable if the window doesn't exist in the .ini file
};
struct ImGuiStyle
{
float Alpha; // Global alpha applies to everything in ImGui
ImVec2 WindowPadding; // Padding within a window
ImVec2 WindowMinSize; // Minimum window size
float WindowRounding; // Radius of window corners rounding. Set to 0.0f to have rectangular windows
float ChildWindowRounding; // Radius of child window corners rounding. Set to 0.0f to have rectangular windows
ImVec2 FramePadding; // Padding within a framed rectangle (used by most widgets)
float FrameRounding; // Radius of frame corners rounding. Set to 0.0f to have rectangular frame (used by most widgets).
ImVec2 ItemSpacing; // Horizontal and vertical spacing between widgets/lines
ImVec2 ItemInnerSpacing; // Horizontal and vertical spacing between within elements of a composed widget (e.g. a slider and its label)
ImVec2 TouchExtraPadding; // Expand bounding box for touch-based system where touch position is not accurate enough (unnecessary for mouse inputs). Unfortunately we don't sort widgets so priority on overlap will always be given to the first widget running. So dont grow this too much!
ImVec2 AutoFitPadding; // Extra space after auto-fit (double-clicking on resize grip)
float WindowFillAlphaDefault; // Default alpha of window background, if not specified in ImGui::Begin()
float TreeNodeSpacing; // Horizontal spacing when entering a tree node
float ColumnsMinSpacing; // Minimum horizontal spacing between two columns
float ScrollBarWidth; // Width of the vertical scroll bar
ImVec4 Colors[ImGuiCol_COUNT];
IMGUI_API ImGuiStyle();
};
// This is where your app communicate with ImGui. Call ImGui::GetIO() to access.
// Read 'Programmer guide' section in .cpp file for general usage.
struct ImGuiIO
{
//------------------------------------------------------------------
// Settings (fill once) // Default value:
//------------------------------------------------------------------
ImVec2 DisplaySize; // <unset> // Display size, in pixels. For clamping windows positions.
float DeltaTime; // = 1.0f/60.0f // Time elapsed since last frame, in seconds.
float IniSavingRate; // = 5.0f // Maximum time between saving positions/sizes to .ini file, in seconds.
const char* IniFilename; // = "imgui.ini" // Path to .ini file. NULL to disable .ini saving.
const char* LogFilename; // = "imgui_log.txt" // Path to .log file (default parameter to ImGui::LogToFile when no file is specified).
float MouseDoubleClickTime; // = 0.30f // Time for a double-click, in seconds.
float MouseDoubleClickMaxDist; // = 6.0f // Distance threshold to stay in to validate a double-click, in pixels.
int KeyMap[ImGuiKey_COUNT]; // <unset> // Map of indices into the KeysDown[512] entries array
void* UserData; // = NULL // Store your own data for retrieval by callbacks.
ImFontAtlas* Fonts; // <auto> // Load and assemble one or more fonts into a single tightly packed texture. Output to Fonts array.
float FontGlobalScale; // = 1.0f // Global scale all fonts
bool FontAllowUserScaling; // = false // Allow user scaling text of individual window with CTRL+Wheel.
ImVec2 DisplayVisibleMin; // <unset> (0.0f,0.0f) // If you use DisplaySize as a virtual space larger than your screen, set DisplayVisibleMin/Max to the visible area.
ImVec2 DisplayVisibleMax; // <unset> (0.0f,0.0f) // If the values are the same, we defaults to Min=(0.0f) and Max=DisplaySize
//------------------------------------------------------------------
// User Functions
//------------------------------------------------------------------
// REQUIRED: rendering function.
// See example code if you are unsure of how to implement this.
void (*RenderDrawListsFn)(ImDrawList** const draw_lists, int count);
// Optional: access OS clipboard
// (default to use native Win32 clipboard on Windows, otherwise uses a private clipboard. Override to access OS clipboard on other architectures)
const char* (*GetClipboardTextFn)();
void (*SetClipboardTextFn)(const char* text);
// Optional: override memory allocations (default to posix malloc/free). MemFreeFn() may be called with a NULL pointer.
void* (*MemAllocFn)(size_t sz);
void (*MemFreeFn)(void* ptr);
// Optional: notify OS Input Method Editor of the screen position of your cursor for text input position (e.g. when using Japanese/Chinese IME in Windows)
void (*ImeSetInputScreenPosFn)(int x, int y);
//------------------------------------------------------------------
// Input - Fill before calling NewFrame()
//------------------------------------------------------------------
ImVec2 MousePos; // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
bool MouseDown[5]; // Mouse buttons. ImGui itself only uses button 0 (left button). Others buttons allows to track if mouse is being used by your application + available to user as a convenience via IsMouse** API.
float MouseWheel; // Mouse wheel: 1 unit scrolls about 5 lines text.
bool MouseDrawCursor; // Request ImGui to draw a mouse cursor for you (if you are on a platform without a mouse cursor).
bool KeyCtrl; // Keyboard modifier pressed: Control
bool KeyShift; // Keyboard modifier pressed: Shift
bool KeysDown[512]; // Keyboard keys that are pressed (in whatever storage order you naturally have access to keyboard data)
ImWchar InputCharacters[16+1]; // List of characters input (translated by user from keypress+keyboard state). Fill using AddInputCharacter() helper.
// Function
IMGUI_API void AddInputCharacter(ImWchar c); // Helper to add a new character into InputCharacters[]
//------------------------------------------------------------------
// Output - Retrieve after calling NewFrame(), you can use them to discard inputs or hide them from the rest of your application
//------------------------------------------------------------------
bool WantCaptureMouse; // Mouse is hovering a window or widget is active (= ImGui will use your mouse input)
bool WantCaptureKeyboard; // Widget is active (= ImGui will use your keyboard input)
float Framerate; // Framerate estimation, in frame per second. Rolling average estimation based on IO.DeltaTime over 120 frames
//------------------------------------------------------------------
// [Internal] ImGui will maintain those fields for you
//------------------------------------------------------------------
ImVec2 MousePosPrev; // Previous mouse position
ImVec2 MouseDelta; // Mouse delta. Note that this is zero if either current or previous position are negative to allow mouse enabling/disabling.
bool MouseClicked[5]; // Mouse button went from !Down to Down
ImVec2 MouseClickedPos[5]; // Position at time of clicking
float MouseClickedTime[5]; // Time of last click (used to figure out double-click)
bool MouseDoubleClicked[5]; // Has mouse button been double-clicked?
bool MouseDownOwned[5]; // Track if button was clicked inside a window. We don't request mouse capture from the application if click started outside ImGui bounds.
float MouseDownTime[5]; // Time the mouse button has been down
float KeysDownTime[512]; // Time the keyboard key has been down
IMGUI_API ImGuiIO();
};
//-----------------------------------------------------------------------------
// Helpers
//-----------------------------------------------------------------------------
// Helper: execute a block of code once a frame only
// Convenient if you want to quickly create an UI within deep-nested code that runs multiple times every frame.
// Usage:
// IMGUI_ONCE_UPON_A_FRAME
// {
// // code block will be executed one per frame
// }
// Attention! the macro expands into 2 statement so make sure you don't use it within e.g. an if() statement without curly braces.
#define IMGUI_ONCE_UPON_A_FRAME static ImGuiOnceUponAFrame imgui_oaf##__LINE__; if (imgui_oaf##__LINE__)
struct ImGuiOnceUponAFrame
{
ImGuiOnceUponAFrame() { RefFrame = -1; }
mutable int RefFrame;
operator bool() const { const int current_frame = ImGui::GetFrameCount(); if (RefFrame == current_frame) return false; RefFrame = current_frame; return true; }
};
// Helper: Parse and apply text filters. In format "aaaaa[,bbbb][,ccccc]"
struct ImGuiTextFilter
{
struct TextRange
{
const char* b;
const char* e;
TextRange() { b = e = NULL; }
TextRange(const char* _b, const char* _e) { b = _b; e = _e; }
const char* begin() const { return b; }
const char* end() const { return e; }
bool empty() const { return b == e; }
char front() const { return *b; }
static bool isblank(char c) { return c == ' ' || c == '\t'; }
void trim_blanks() { while (b < e && isblank(*b)) b++; while (e > b && isblank(*(e-1))) e--; }
IMGUI_API void split(char separator, ImVector<TextRange>& out);
};
char InputBuf[256];
ImVector<TextRange> Filters;
int CountGrep;
ImGuiTextFilter(const char* default_filter = "");
void Clear() { InputBuf[0] = 0; Build(); }
void Draw(const char* label = "Filter (inc,-exc)", float width = -1.0f); // Helper calling InputText+Build
bool PassFilter(const char* val) const;
bool IsActive() const { return !Filters.empty(); }
IMGUI_API void Build();
};
// Helper: Text buffer for logging/accumulating text
struct ImGuiTextBuffer
{
ImVector<char> Buf;
ImGuiTextBuffer() { Buf.push_back(0); }
~ImGuiTextBuffer() { }
const char* begin() const { return &Buf.front(); }
const char* end() const { return &Buf.back(); } // Buf is zero-terminated, so end() will point on the zero-terminator
size_t size() const { return Buf.size()-1; }
bool empty() { return size() >= 1; }
void clear() { Buf.clear(); Buf.push_back(0); }
IMGUI_API void append(const char* fmt, ...);
IMGUI_API void appendv(const char* fmt, va_list args);
};
// Helper: Key->value storage
// - Store collapse state for a tree (Int 0/1)
// - Store color edit options (Int using values in ImGuiColorEditMode enum).
// - Custom user storage for temporary values.
// Typically you don't have to worry about this since a storage is held within each Window.
// Declare your own storage if:
// - You want to manipulate the open/close state of a particular sub-tree in your interface (tree node uses Int 0/1 to store their state).
// - You want to store custom debug data easily without adding or editing structures in your code.
struct ImGuiStorage
{
struct Pair
{
ImGuiID key;
union { int val_i; float val_f; void* val_p; };
Pair(ImGuiID _key, int _val_i) { key = _key; val_i = _val_i; }
Pair(ImGuiID _key, float _val_f) { key = _key; val_f = _val_f; }
Pair(ImGuiID _key, void* _val_p) { key = _key; val_p = _val_p; }
};
ImVector<Pair> Data;
// - Get***() functions find pair, never add/allocate. Pairs are sorted so a query is O(log N)
// - Set***() functions find pair, insertion on demand if missing.
// - Sorted insertion is costly but should amortize. A typical frame shouldn't need to insert any new pair.
IMGUI_API void Clear();
IMGUI_API int GetInt(ImGuiID key, int default_val = 0) const;
IMGUI_API void SetInt(ImGuiID key, int val);
IMGUI_API float GetFloat(ImGuiID key, float default_val = 0.0f) const;
IMGUI_API void SetFloat(ImGuiID key, float val);
IMGUI_API void* GetVoidPtr(ImGuiID key) const; // default_val is NULL
IMGUI_API void SetVoidPtr(ImGuiID key, void* val);
// - Get***Ref() functions finds pair, insert on demand if missing, return pointer. Useful if you intend to do Get+Set.
// - References are only valid until a new value is added to the storage. Calling a Set***() function or a Get***Ref() function invalidates the pointer.
// - A typical use case where this is convenient:
// float* pvar = ImGui::GetFloatRef(key); ImGui::SliderFloat("var", pvar, 0, 100.0f); some_var += *pvar;
// - You can also use this to quickly create temporary editable values during a session of using Edit&Continue, without restarting your application.
IMGUI_API int* GetIntRef(ImGuiID key, int default_val = 0);
IMGUI_API float* GetFloatRef(ImGuiID key, float default_val = 0);
// Use on your own storage if you know only integer are being stored (open/close all tree nodes)
IMGUI_API void SetAllInt(int val);
};
// Shared state of InputText(), passed to callback when a ImGuiInputTextFlags_Callback* flag is used.
struct ImGuiTextEditCallbackData
{
ImGuiInputTextFlags EventFlag; // One of ImGuiInputTextFlags_Callback* // Read-only
ImGuiInputTextFlags Flags; // What user passed to InputText() // Read-only
void* UserData; // What user passed to InputText() // Read-only
// CharFilter event:
ImWchar EventChar; // Character input // Read-write (replace character or set to zero)
// Completion,History,Always events:
ImGuiKey EventKey; // Key pressed (Up/Down/TAB) // Read-only
char* Buf; // Current text // Read-write (pointed data only)
size_t BufSize; // // Read-only
bool BufDirty; // Set if you modify Buf directly // Write
int CursorPos; // // Read-write
int SelectionStart; // // Read-write (== to SelectionEnd when no selection)
int SelectionEnd; // // Read-write
// NB: calling those function loses selection.
void DeleteChars(int pos, int bytes_count);
void InsertChars(int pos, const char* text, const char* text_end = NULL);
};
// ImColor() is just a helper that implicity converts to either ImU32 (packed 4x1 byte) or ImVec4 (4x1 float)
// None of the ImGui API are using ImColor directly but you can use it as a convenience to pass colors in either formats.
struct ImColor
{
ImVec4 Value;
ImColor(int r, int g, int b, int a = 255) { Value.x = (float)r / 255.0f; Value.y = (float)g / 255.0f; Value.z = (float)b / 255.0f; Value.w = (float)a / 255.0f; }
ImColor(float r, float g, float b, float a = 1.0f) { Value.x = r; Value.y = g; Value.z = b; Value.w = a; }
ImColor(const ImVec4& col) { Value = col; }
operator ImU32() const { return ImGui::ColorConvertFloat4ToU32(Value); }
operator ImVec4() const { return Value; }
static ImColor HSV(float h, float s, float v, float a = 1.0f) { float r,g,b; ImGui::ColorConvertHSVtoRGB(h, s, v, r, g, b); return ImColor(r,g,b,a); }
};
//-----------------------------------------------------------------------------
// Draw List
// Hold a series of drawing commands. The user provides a renderer for ImDrawList.
//-----------------------------------------------------------------------------
// Draw callbacks for advanced uses.
// NB- You most likely DO NOT need to care about draw callbacks just to create your own widget or customized UI rendering (you can poke into the draw list for that)
// Draw callback are useful for example if you want to render a complex 3D scene inside a UI element.
// The expected behavior from your rendering loop is:
// if (cmd.user_callback != NULL)
// cmd.user_callback(parent_list, cmd);
// else
// RenderTriangles()
// It is up to you to decide if your rendering loop or the callback should be responsible for backup/restoring rendering state.
typedef void (*ImDrawCallback)(const ImDrawList* parent_list, const ImDrawCmd* cmd);
// Typically, 1 command = 1 gpu draw call (unless command is a callback)
struct ImDrawCmd
{
unsigned int vtx_count; // Number of vertices (multiple of 3) to be drawn as triangles. The vertices are stored in the callee ImDrawList's vtx_buffer[] array.
ImVec4 clip_rect; // Clipping rectangle (x1, y1, x2, y2)
ImTextureID texture_id; // User-provided texture ID. Set by user in ImfontAtlas::SetTexID() for fonts or passed to Image*() functions. Ignore if never using images or multiple fonts atlas.
ImDrawCallback user_callback; // If != NULL, call the function instead of rendering the vertices. vtx_count will be 0. clip_rect and texture_id will be set normally.
void* user_callback_data; // The draw callback code can access this.
};
// Vertex layout
#ifndef IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT
struct ImDrawVert
{
ImVec2 pos;
ImVec2 uv;
ImU32 col;
};
#else
// You can change the vertex format layout by defining IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT in imconfig.h
// The code expect ImVec2 pos (8 bytes), ImVec2 uv (8 bytes), ImU32 col (4 bytes), but you can re-order them or add other fields as needed to simplify integration in your engine.
// The type has to be described by the #define (you can either declare the struct or use a typedef)
IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT;
#endif
// Draw command list
// This is the low-level list of polygons that ImGui functions are filling. At the end of the frame, all command lists are passed to your ImGuiIO::RenderDrawListFn function for rendering.
// At the moment, each ImGui window contains its own ImDrawList but they could potentially be merged in the future.
// If you want to add custom rendering within a window, you can use ImGui::GetWindowDrawList() to access the current draw list and add your own primitives.
// You can interleave normal ImGui:: calls and adding primitives to the current draw list.
// Note that this only gives you access to rendering polygons. If your intent is to create custom widgets and the publicly exposed functions/data aren't sufficient, you can add code in imgui_user.inl
struct ImDrawList
{
// This is what you have to render
ImVector<ImDrawCmd> commands; // Commands. Typically 1 command = 1 gpu draw call.
ImVector<ImDrawVert> vtx_buffer; // Vertex buffer. Each command consume ImDrawCmd::vtx_count of those
// [Internal to ImGui]
ImVector<ImVec4> clip_rect_stack; // [Internal]
ImVector<ImTextureID> texture_id_stack; // [Internal]
ImDrawVert* vtx_write; // [Internal] point within vtx_buffer after each add command (to avoid using the ImVector<> operators too much)
ImDrawList() { Clear(); }
IMGUI_API void Clear();
IMGUI_API void PushClipRect(const ImVec4& clip_rect); // Scissoring. The values are x1, y1, x2, y2.
IMGUI_API void PopClipRect();
IMGUI_API void PushTextureID(const ImTextureID& texture_id);
IMGUI_API void PopTextureID();
// Primitives
IMGUI_API void AddLine(const ImVec2& a, const ImVec2& b, ImU32 col);
IMGUI_API void AddRect(const ImVec2& a, const ImVec2& b, ImU32 col, float rounding = 0.0f, int rounding_corners=0x0F);
IMGUI_API void AddRectFilled(const ImVec2& a, const ImVec2& b, ImU32 col, float rounding = 0.0f, int rounding_corners=0x0F);
IMGUI_API void AddTriangleFilled(const ImVec2& a, const ImVec2& b, const ImVec2& c, ImU32 col);
IMGUI_API void AddCircle(const ImVec2& centre, float radius, ImU32 col, int num_segments = 12);
IMGUI_API void AddCircleFilled(const ImVec2& centre, float radius, ImU32 col, int num_segments = 12);
IMGUI_API void AddArc(const ImVec2& center, float rad, ImU32 col, int a_min, int a_max, bool tris = false, const ImVec2& third_point_offset = ImVec2(0,0));
IMGUI_API void AddText(ImFont* font, float font_size, const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end = NULL, float wrap_width = 0.0f, const ImVec2* cpu_clip_max = NULL);
IMGUI_API void AddImage(ImTextureID user_texture_id, const ImVec2& a, const ImVec2& b, const ImVec2& uv0, const ImVec2& uv1, ImU32 col = 0xFFFFFFFF);
// Advanced
IMGUI_API void AddCallback(ImDrawCallback callback, void* callback_data); // Your rendering function must check for 'user_callback' in ImDrawCmd and call the function instead of rendering triangles.
IMGUI_API void AddDrawCmd(); // This is useful if you need to forcefully create a new draw call (to allow for dependent rendering / blending). Otherwise primitives are merged into the same draw-call as much as possible
// Internal helpers
IMGUI_API void ReserveVertices(unsigned int vtx_count);
IMGUI_API void AddVtx(const ImVec2& pos, ImU32 col);
IMGUI_API void AddVtxUV(const ImVec2& pos, ImU32 col, const ImVec2& uv);
IMGUI_API void AddVtxLine(const ImVec2& a, const ImVec2& b, ImU32 col);
IMGUI_API void UpdateClipRect();
IMGUI_API void UpdateTextureID();
};
// Load and rasterize multiple TTF fonts into a same texture.
// Sharing a texture for multiple fonts allows us to reduce the number of draw calls during rendering.
// We also add custom graphic data into the texture that serves for ImGui.
// 1. (Optional) Call AddFont*** functions. If you don't call any, the default font will be loaded for you.
// 2. Call GetTexDataAsAlpha8() or GetTexDataAsRGBA32() to build and retrieve pixels data.
// 3. Upload the pixels data into a texture within your graphics system.
// 4. Call SetTexID(my_tex_id); and pass the pointer/identifier to your texture. This value will be passed back to you during rendering to identify the texture.
// 5. Call ClearPixelsData() to free textures memory on the heap.
struct ImFontAtlas
{
IMGUI_API ImFontAtlas();
IMGUI_API ~ImFontAtlas();
IMGUI_API ImFont* AddFontDefault();
IMGUI_API ImFont* AddFontFromFileTTF(const char* filename, float size_pixels, const ImWchar* glyph_ranges = NULL, int font_no = 0);
IMGUI_API ImFont* AddFontFromMemoryTTF(void* in_ttf_data, size_t in_ttf_data_size, float size_pixels, const ImWchar* glyph_ranges = NULL, int font_no = 0); // Pass ownership of 'in_ttf_data' memory.
IMGUI_API void ClearTexData(); // Saves RAM once the texture has been copied to graphics memory.
IMGUI_API void Clear();
// Retrieve texture data
// User is in charge of copying the pixels into graphics memory, then call SetTextureUserID()
// After loading the texture into your graphic system, store your texture handle in 'TexID' (ignore if you aren't using multiple fonts nor images)
// RGBA32 format is provided for convenience and high compatibility, but note that all RGB pixels are white, so 75% of the memory is wasted.
// Pitch = Width * BytesPerPixels
IMGUI_API void GetTexDataAsAlpha8(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel = NULL); // 1 byte per-pixel
IMGUI_API void GetTexDataAsRGBA32(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel = NULL); // 4 bytes-per-pixel
IMGUI_API void SetTexID(void* id) { TexID = id; }
// Helpers to retrieve list of common Unicode ranges (2 value per range, values are inclusive, zero-terminated list)
// (Those functions could be static, aren't so simple use case doesn't have to refer to the ImFontAtlas:: type ever if in their code)
IMGUI_API const ImWchar* GetGlyphRangesDefault(); // Basic Latin, Extended Latin
IMGUI_API const ImWchar* GetGlyphRangesJapanese(); // Default + Hiragana, Katakana, Half-Width, Selection of 1946 Ideographs
IMGUI_API const ImWchar* GetGlyphRangesChinese(); // Japanese + full set of about 21000 CJK Unified Ideographs
// Members
// (Access texture data via GetTexData*() calls which will setup a default font for you.)
void* TexID; // User data to refer to the texture once it has been uploaded to user's graphic systems. It ia passed back to you during rendering.
unsigned char* TexPixelsAlpha8; // 1 component per pixel, each component is unsigned 8-bit. Total size = TexWidth * TexHeight
unsigned int* TexPixelsRGBA32; // 4 component per pixel, each component is unsigned 8-bit. Total size = TexWidth * TexHeight * 4
int TexWidth;
int TexHeight;
ImVec2 TexExtraDataPos; // Position of our rectangle where we draw non-font graphics
ImVec2 TexUvWhitePixel; // Texture coordinates to a white pixel (part of the TexExtraData block)
ImVector<ImFont*> Fonts;
// Private
struct ImFontAtlasData;
ImVector<ImFontAtlasData*> InputData; // Internal data
IMGUI_API bool Build(); // Build pixels data. This is automatically for you by the GetTexData*** functions.
IMGUI_API void ClearInputData(); // Clear the input TTF data.
IMGUI_API void RenderCustomTexData();
};
// TTF font loading and rendering
// ImFontAtlas automatically loads a default embedded font for you when you call GetTexDataAsAlpha8() or GetTexDataAsRGBA32().
// Kerning isn't supported. At the moment some ImGui code does per-character CalcTextSize calls, need something more state-ful.
struct ImFont
{
// Members: Settings
float FontSize; // <user set> // Height of characters, set during loading (don't change after loading)
float Scale; // = 1.0f // Base font scale, multiplied by the per-window font scale which you can adjust with SetFontScale()
ImVec2 DisplayOffset; // = (0.0f,0.0f) // Offset font rendering by xx pixels
ImWchar FallbackChar; // = '?' // Replacement glyph if one isn't found.
// Members: Runtime data
struct Glyph
{
ImWchar Codepoint;
signed short XAdvance;
signed short Width, Height;
signed short XOffset, YOffset;
float U0, V0, U1, V1; // Texture coordinates
};
ImFontAtlas* ContainerAtlas; // What we has been loaded into
ImVector<Glyph> Glyphs;
ImVector<float> IndexXAdvance; // Glyphs->XAdvance directly indexable (for CalcTextSize functions which are often bottleneck in large UI)
ImVector<int> IndexLookup; // Index glyphs by Unicode code-point
const Glyph* FallbackGlyph; // == FindGlyph(FontFallbackChar)
// Methods
IMGUI_API ImFont();
IMGUI_API ~ImFont() { Clear(); }
IMGUI_API void Clear();
IMGUI_API void BuildLookupTable();
IMGUI_API const Glyph* FindGlyph(unsigned short c) const;
IMGUI_API bool IsLoaded() const { return ContainerAtlas != NULL; }
// 'max_width' stops rendering after a certain width (could be turned into a 2d size). FLT_MAX to disable.
// 'wrap_width' enable automatic word-wrapping across multiple lines to fit into given width. 0.0f to disable.
IMGUI_API ImVec2 CalcTextSizeA(float size, float max_width, float wrap_width, const char* text_begin, const char* text_end = NULL, const char** remaining = NULL) const; // utf8
IMGUI_API ImVec2 CalcTextSizeW(float size, float max_width, const ImWchar* text_begin, const ImWchar* text_end, const ImWchar** remaining = NULL) const; // wchar
IMGUI_API void RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, ImDrawVert*& out_vertices, float wrap_width = 0.0f, const ImVec2* cpu_clip_max = NULL) const;
IMGUI_API const char* CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width) const;
};
//---- Include imgui_user.h at the end of imgui.h
//---- So you can include code that extends ImGui using any of the types declared above.
//---- (also convenient for user to only explicitly include vanilla imgui.h)
#ifdef IMGUI_INCLUDE_IMGUI_USER_H
#include "imgui_user.h"
#endif
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