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imgui.cpp
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8178 lines (7256 loc) · 332 KB
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#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
#include "imgui.hpp"
#ifndef IMGUI_DEFINE_MATH_OPERATORS
#define IMGUI_DEFINE_MATH_OPERATORS
#endif
#include "imgui_internal.hpp"
#include <ctype.h> // toupper
#include <stdio.h> // vsnprintf, sscanf, printf
#if defined(_MSC_VER) && _MSC_VER <= 1500 // MSVC 2008 or earlier
#include <stddef.h> // intptr_t
#else
#include <stdint.h> // intptr_t
#endif
#define IMGUI_DISABLE_WIN32_FUNCTIONS
#define static
// Debug options
#define IMGUI_DEBUG_NAV_SCORING 0 // Display navigation scoring preview when hovering items. Display last moving direction matches when holding CTRL
#define IMGUI_DEBUG_NAV_RECTS 0 // Display the reference navigation rectangle for each window
#define IMGUI_DEBUG_INI_SETTINGS 0 // Save additional comments in .ini file
// Visual Studio warnings
#ifdef _MSC_VER
#pragma warning (disable: 4127) // condition expression is constant
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
#endif
// When using CTRL+TAB (or Gamepad Square+L/R) we delay the visual a little in order to reduce visual noise doing a fast switch.
static const float NAV_WINDOWING_HIGHLIGHT_DELAY = 0.20f; // Time before the highlight and screen dimming starts fading in
static const float NAV_WINDOWING_LIST_APPEAR_DELAY = 0.15f; // Time before the window list starts to appear
// Window resizing from edges (when io.ConfigWindowsResizeFromEdges = true and ImGuiBackendFlags_HasMouseCursors is set in io.BackendFlags by back-end)
static const float WINDOWS_RESIZE_FROM_EDGES_HALF_THICKNESS = 4.0f; // Extend outside and inside windows. Affect FindHoveredWindow().
static const float WINDOWS_RESIZE_FROM_EDGES_FEEDBACK_TIMER = 0.04f; // Reduce visual noise by only highlighting the border after a certain time.
static const float WINDOWS_MOUSE_WHEEL_SCROLL_LOCK_TIMER = 2.00f; // Lock scrolled window (so it doesn't pick child windows that are scrolling through) for a certaint time, unless mouse moved.
//-------------------------------------------------------------------------
// [SECTION] FORWARD DECLARATIONS
//-------------------------------------------------------------------------
static void SetCurrentWindow(ImGuiWindow* window);
static void FindHoveredWindow();
static ImGuiWindow* CreateNewWindow(const char* name, ImVec2 size, ImGuiWindowFlags flags);
static void CheckStacksSize(ImGuiWindow* window, bool write);
static ImVec2 CalcNextScrollFromScrollTargetAndClamp(ImGuiWindow* window, bool snap_on_edges);
static void AddDrawListToDrawData(ImVector<ImDrawList*>* out_list, ImDrawList* draw_list);
static void AddWindowToSortBuffer(ImVector<ImGuiWindow*>* out_sorted_windows, ImGuiWindow* window);
static ImRect GetViewportRect();
// Settings
static void* SettingsHandlerWindow_ReadOpen(ImGuiContext*, ImGuiSettingsHandler*, const char* name);
static void SettingsHandlerWindow_ReadLine(ImGuiContext*, ImGuiSettingsHandler*, void* entry, const char* line);
static void SettingsHandlerWindow_WriteAll(ImGuiContext* imgui_ctx, ImGuiSettingsHandler* handler, ImGuiTextBuffer* buf);
// Platform Dependents default implementation for IO functions
static void ImeSetInputScreenPosFn_DefaultImpl(int x, int y);
namespace ImGui
{
static bool BeginChildEx(const char* name, ImGuiID id, const ImVec2& size_arg, bool border, ImGuiWindowFlags flags);
// Navigation
static void NavUpdate();
static void NavUpdateWindowing();
static void NavUpdateWindowingList();
static void NavUpdateMoveResult();
static float NavUpdatePageUpPageDown(int allowed_dir_flags);
static inline void NavUpdateAnyRequestFlag();
static void NavProcessItem(ImGuiWindow* window, const ImRect& nav_bb, ImGuiID id);
static ImVec2 NavCalcPreferredRefPos();
static void NavSaveLastChildNavWindowIntoParent(ImGuiWindow* nav_window);
static ImGuiWindow* NavRestoreLastChildNavWindow(ImGuiWindow* window);
static int FindWindowFocusIndex(ImGuiWindow* window);
// Misc
static void UpdateMouseInputs();
static void UpdateMouseWheel();
static bool UpdateManualResize(ImGuiWindow* window, const ImVec2& size_auto_fit, int* border_held, int resize_grip_count, ImU32 resize_grip_col[4]);
static void UpdateDebugToolItemPicker();
static void RenderWindowOuterBorders(ImGuiWindow* window);
static void RenderWindowDecorations(ImGuiWindow* window, const ImRect& title_bar_rect, bool title_bar_is_highlight, int resize_grip_count, const ImU32 resize_grip_col[4], float resize_grip_draw_size);
static void RenderWindowTitleBarContents(ImGuiWindow* window, const ImRect& title_bar_rect, const char* name, bool* p_open);
}
//-----------------------------------------------------------------------------
// [SECTION] CONTEXT AND MEMORY ALLOCATORS
//-----------------------------------------------------------------------------
// Current context pointer. Implicitly used by all Dear ImGui functions. Always assumed to be != NULL.
// ImGui::CreateContext() will automatically set this pointer if it is NULL. Change to a different context by calling ImGui::SetCurrentContext().
// 1) Important: globals are not shared across DLL boundaries! If you use DLLs or any form of hot-reloading: you will need to call
// SetCurrentContext() (with the pointer you got from CreateContext) from each unique static/DLL boundary, and after each hot-reloading.
// In your debugger, add GImGui to your watch window and notice how its value changes depending on which location you are currently stepping into.
// 2) Important: Dear ImGui functions are not thread-safe because of this pointer.
// If you want thread-safety to allow N threads to access N different contexts, you can:
// - Change this variable to use thread local storage so each thread can refer to a different context, in imconfig.h:
// struct ImGuiContext;
// extern thread_local ImGuiContext* MyImGuiTLS;
// #define GImGui MyImGuiTLS
// And then define MyImGuiTLS in one of your cpp file. Note that thread_local is a C++11 keyword, earlier C++ uses compiler-specific keyword.
// - Future development aim to make this context pointer explicit to all calls. Also read https://github.com/ocornut/imgui/issues/586
// - If you need a finite number of contexts, you may compile and use multiple instances of the ImGui code from different namespace.
#ifndef GImGui
ImGuiContext* GImGui = NULL;
#endif
// Memory Allocator functions. Use SetAllocatorFunctions() to change them.
// If you use DLL hotreloading you might need to call SetAllocatorFunctions() after reloading code from this file.
// Otherwise, you probably don't want to modify them mid-program, and if you use global/static e.g. ImVector<> instances you may need to keep them accessible during program destruction.
#ifndef IMGUI_DISABLE_DEFAULT_ALLOCATORS
static void* MallocWrapper(size_t size, void* user_data) { IM_UNUSED(user_data); return malloc(size); }
static void FreeWrapper(void* ptr, void* user_data) { IM_UNUSED(user_data); free(ptr); }
#else
static void* MallocWrapper(size_t size, void* user_data) { IM_UNUSED(user_data); IM_UNUSED(size); IM_ASSERT(0); return NULL; }
static void FreeWrapper(void* ptr, void* user_data) { IM_UNUSED(user_data); IM_UNUSED(ptr); IM_ASSERT(0); }
#endif
static void* (*GImAllocatorAllocFunc)(size_t size, void* user_data) = MallocWrapper;
static void (*GImAllocatorFreeFunc)(void* ptr, void* user_data) = FreeWrapper;
static void* GImAllocatorUserData = NULL;
//-----------------------------------------------------------------------------
// [SECTION] MAIN USER FACING STRUCTURES (ImGuiStyle, ImGuiIO)
//-----------------------------------------------------------------------------
ImGuiStyle::ImGuiStyle()
{
Alpha = 1.0f; // Global alpha applies to everything in ImGui
WindowPadding = ImVec2(8, 8); // Padding within a window
WindowRounding = 7.0f; // Radius of window corners rounding. Set to 0.0f to have rectangular windows
WindowBorderSize = 1.0f; // Thickness of border around windows. Generally set to 0.0f or 1.0f. Other values not well tested.
WindowMinSize = ImVec2(32, 32); // Minimum window size
WindowTitleAlign = ImVec2(0.0f, 0.5f);// Alignment for title bar text
WindowMenuButtonPosition = ImGuiDir_Left; // Position of the collapsing/docking button in the title bar (left/right). Defaults to ImGuiDir_Left.
ChildRounding = 0.0f; // Radius of child window corners rounding. Set to 0.0f to have rectangular child windows
ChildBorderSize = 1.0f; // Thickness of border around child windows. Generally set to 0.0f or 1.0f. Other values not well tested.
PopupRounding = 0.0f; // Radius of popup window corners rounding. Set to 0.0f to have rectangular child windows
PopupBorderSize = 1.0f; // Thickness of border around popup or tooltip windows. Generally set to 0.0f or 1.0f. Other values not well tested.
FramePadding = ImVec2(4, 3); // Padding within a framed rectangle (used by most widgets)
FrameRounding = 0.0f; // Radius of frame corners rounding. Set to 0.0f to have rectangular frames (used by most widgets).
FrameBorderSize = 0.0f; // Thickness of border around frames. Generally set to 0.0f or 1.0f. Other values not well tested.
ItemSpacing = ImVec2(8, 4); // Horizontal and vertical spacing between widgets/lines
ItemInnerSpacing = ImVec2(4, 4); // Horizontal and vertical spacing between within elements of a composed widget (e.g. a slider and its label)
TouchExtraPadding = ImVec2(0, 0); // Expand reactive bounding box for touch-based system where touch position is not accurate enough. Unfortunately we don't sort widgets so priority on overlap will always be given to the first widget. So don't grow this too much!
IndentSpacing = 21.0f; // Horizontal spacing when e.g. entering a tree node. Generally == (FontSize + FramePadding.x*2).
ColumnsMinSpacing = 6.0f; // Minimum horizontal spacing between two columns. Preferably > (FramePadding.x + 1).
ScrollbarSize = 14.0f; // Width of the vertical scrollbar, Height of the horizontal scrollbar
ScrollbarRounding = 9.0f; // Radius of grab corners rounding for scrollbar
GrabMinSize = 10.0f; // Minimum width/height of a grab box for slider/scrollbar
GrabRounding = 0.0f; // Radius of grabs corners rounding. Set to 0.0f to have rectangular slider grabs.
TabRounding = 4.0f; // Radius of upper corners of a tab. Set to 0.0f to have rectangular tabs.
TabBorderSize = 0.0f; // Thickness of border around tabs.
ColorButtonPosition = ImGuiDir_Right; // Side of the color button in the ColorEdit4 widget (left/right). Defaults to ImGuiDir_Right.
ButtonTextAlign = ImVec2(0.5f, 0.5f);// Alignment of button text when button is larger than text.
SelectableTextAlign = ImVec2(0.0f, 0.0f);// Alignment of selectable text when button is larger than text.
DisplayWindowPadding = ImVec2(19, 19); // Window position are clamped to be visible within the display area by at least this amount. Only applies to regular windows.
DisplaySafeAreaPadding = ImVec2(3, 3); // If you cannot see the edge of your screen (e.g. on a TV) increase the safe area padding. Covers popups/tooltips as well regular windows.
MouseCursorScale = 1.0f; // Scale software rendered mouse cursor (when io.MouseDrawCursor is enabled). May be removed later.
AntiAliasedLines = true; // Enable anti-aliasing on lines/borders. Disable if you are really short on CPU/GPU.
AntiAliasedFill = true; // Enable anti-aliasing on filled shapes (rounded rectangles, circles, etc.)
CurveTessellationTol = 1.25f; // Tessellation tolerance when using PathBezierCurveTo() without a specific number of segments. Decrease for highly tessellated curves (higher quality, more polygons), increase to reduce quality.
// Default theme
ImGui::StyleColorsDark(this);
}
// To scale your entire UI (e.g. if you want your app to use High DPI or generally be DPI aware) you may use this helper function. Scaling the fonts is done separately and is up to you.
// Important: This operation is lossy because we round all sizes to integer. If you need to change your scale multiples, call this over a freshly initialized ImGuiStyle structure rather than scaling multiple times.
void ImGuiStyle::ScaleAllSizes(float scale_factor)
{
WindowPadding = ImFloor(WindowPadding * scale_factor);
WindowRounding = ImFloor(WindowRounding * scale_factor);
WindowMinSize = ImFloor(WindowMinSize * scale_factor);
ChildRounding = ImFloor(ChildRounding * scale_factor);
PopupRounding = ImFloor(PopupRounding * scale_factor);
FramePadding = ImFloor(FramePadding * scale_factor);
FrameRounding = ImFloor(FrameRounding * scale_factor);
ItemSpacing = ImFloor(ItemSpacing * scale_factor);
ItemInnerSpacing = ImFloor(ItemInnerSpacing * scale_factor);
TouchExtraPadding = ImFloor(TouchExtraPadding * scale_factor);
IndentSpacing = ImFloor(IndentSpacing * scale_factor);
ColumnsMinSpacing = ImFloor(ColumnsMinSpacing * scale_factor);
ScrollbarSize = ImFloor(ScrollbarSize * scale_factor);
ScrollbarRounding = ImFloor(ScrollbarRounding * scale_factor);
GrabMinSize = ImFloor(GrabMinSize * scale_factor);
GrabRounding = ImFloor(GrabRounding * scale_factor);
TabRounding = ImFloor(TabRounding * scale_factor);
DisplayWindowPadding = ImFloor(DisplayWindowPadding * scale_factor);
DisplaySafeAreaPadding = ImFloor(DisplaySafeAreaPadding * scale_factor);
MouseCursorScale = ImFloor(MouseCursorScale * scale_factor);
}
ImGuiIO::ImGuiIO()
{
// Most fields are initialized with zero
memset(this, 0, sizeof(*this));
// Settings
ConfigFlags = ImGuiConfigFlags_None;
BackendFlags = ImGuiBackendFlags_None;
DisplaySize = ImVec2(-1.0f, -1.0f);
DeltaTime = 1.0f / 60.0f;
IniSavingRate = 5.0f;
MouseDoubleClickTime = 0.30f;
MouseDoubleClickMaxDist = 6.0f;
for (int i = 0; i < ImGuiKey_COUNT; i++)
KeyMap[i] = -1;
KeyRepeatDelay = 0.250f;
KeyRepeatRate = 0.050f;
UserData = NULL;
Fonts = NULL;
FontGlobalScale = 1.0f;
FontDefault = NULL;
FontAllowUserScaling = false;
DisplayFramebufferScale = ImVec2(1.0f, 1.0f);
// Miscellaneous options
MouseDrawCursor = false;
#ifdef __APPLE__
ConfigMacOSXBehaviors = true; // Set Mac OS X style defaults based on __APPLE__ compile time flag
#else
ConfigMacOSXBehaviors = false;
#endif
ConfigInputTextCursorBlink = true;
ConfigWindowsResizeFromEdges = true;
ConfigWindowsMoveFromTitleBarOnly = false;
// Platform Functions
BackendPlatformName = BackendRendererName = NULL;
BackendPlatformUserData = BackendRendererUserData = BackendLanguageUserData = NULL;
ImeSetInputScreenPosFn = ImeSetInputScreenPosFn_DefaultImpl;
ImeWindowHandle = NULL;
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
RenderDrawListsFn = NULL;
#endif
// Input (NB: we already have memset zero the entire structure!)
MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
MousePosPrev = ImVec2(-FLT_MAX, -FLT_MAX);
MouseDragThreshold = 6.0f;
for (int i = 0; i < IM_ARRAYSIZE(MouseDownDuration); i++) MouseDownDuration[i] = MouseDownDurationPrev[i] = -1.0f;
for (int i = 0; i < IM_ARRAYSIZE(KeysDownDuration); i++) KeysDownDuration[i] = KeysDownDurationPrev[i] = -1.0f;
for (int i = 0; i < IM_ARRAYSIZE(NavInputsDownDuration); i++) NavInputsDownDuration[i] = -1.0f;
}
// Pass in translated ASCII characters for text input.
// - with glfw you can get those from the callback set in glfwSetCharCallback()
// - on Windows you can get those using ToAscii+keyboard state, or via the WM_CHAR message
void ImGuiIO::AddInputCharacter(unsigned int c)
{
if (c > 0 && c < 0x10000)
InputQueueCharacters.push_back((ImWchar)c);
}
void ImGuiIO::AddInputCharactersUTF8(const char* utf8_chars)
{
while (*utf8_chars != 0)
{
unsigned int c = 0;
utf8_chars += ImTextCharFromUtf8(&c, utf8_chars, NULL);
if (c > 0 && c < 0x10000)
InputQueueCharacters.push_back((ImWchar)c);
}
}
void ImGuiIO::ClearInputCharacters()
{
InputQueueCharacters.resize(0);
}
//-----------------------------------------------------------------------------
// [SECTION] MISC HELPERS/UTILITIES (Maths, String, Format, Hash, File functions)
//-----------------------------------------------------------------------------
ImVec2 ImLineClosestPoint(const ImVec2& a, const ImVec2& b, const ImVec2& p)
{
ImVec2 ap = p - a;
ImVec2 ab_dir = b - a;
float dot = ap.x * ab_dir.x + ap.y * ab_dir.y;
if (dot < 0.0f)
return a;
float ab_len_sqr = ab_dir.x * ab_dir.x + ab_dir.y * ab_dir.y;
if (dot > ab_len_sqr)
return b;
return a + ab_dir * dot / ab_len_sqr;
}
bool ImTriangleContainsPoint(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p)
{
bool b1 = ((p.x - b.x) * (a.y - b.y) - (p.y - b.y) * (a.x - b.x)) < 0.0f;
bool b2 = ((p.x - c.x) * (b.y - c.y) - (p.y - c.y) * (b.x - c.x)) < 0.0f;
bool b3 = ((p.x - a.x) * (c.y - a.y) - (p.y - a.y) * (c.x - a.x)) < 0.0f;
return ((b1 == b2) && (b2 == b3));
}
void ImTriangleBarycentricCoords(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p, float& out_u, float& out_v, float& out_w)
{
ImVec2 v0 = b - a;
ImVec2 v1 = c - a;
ImVec2 v2 = p - a;
const float denom = v0.x * v1.y - v1.x * v0.y;
out_v = (v2.x * v1.y - v1.x * v2.y) / denom;
out_w = (v0.x * v2.y - v2.x * v0.y) / denom;
out_u = 1.0f - out_v - out_w;
}
ImVec2 ImTriangleClosestPoint(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p)
{
ImVec2 proj_ab = ImLineClosestPoint(a, b, p);
ImVec2 proj_bc = ImLineClosestPoint(b, c, p);
ImVec2 proj_ca = ImLineClosestPoint(c, a, p);
float dist2_ab = ImLengthSqr(p - proj_ab);
float dist2_bc = ImLengthSqr(p - proj_bc);
float dist2_ca = ImLengthSqr(p - proj_ca);
float m = ImMin(dist2_ab, ImMin(dist2_bc, dist2_ca));
if (m == dist2_ab)
return proj_ab;
if (m == dist2_bc)
return proj_bc;
return proj_ca;
}
// Consider using _stricmp/_strnicmp under Windows or strcasecmp/strncasecmp. We don't actually use either ImStricmp/ImStrnicmp in the codebase any more.
int ImStricmp(const char* str1, const char* str2)
{
int d;
while ((d = toupper(*str2) - toupper(*str1)) == 0 && *str1) { str1++; str2++; }
return d;
}
int ImStrnicmp(const char* str1, const char* str2, size_t count)
{
int d = 0;
while (count > 0 && (d = toupper(*str2) - toupper(*str1)) == 0 && *str1) { str1++; str2++; count--; }
return d;
}
void ImStrncpy(char* dst, const char* src, size_t count)
{
if (count < 1)
return;
if (count > 1)
strncpy(dst, src, count - 1);
dst[count - 1] = 0;
}
char* ImStrdup(const char* str)
{
size_t len = strlen(str);
void* buf = IM_ALLOC(len + 1);
return (char*)memcpy(buf, (const void*)str, len + 1);
}
char* ImStrdupcpy(char* dst, size_t* p_dst_size, const char* src)
{
size_t dst_buf_size = p_dst_size ? *p_dst_size : strlen(dst) + 1;
size_t src_size = strlen(src) + 1;
if (dst_buf_size < src_size)
{
IM_FREE(dst);
dst = (char*)IM_ALLOC(src_size);
if (p_dst_size)
*p_dst_size = src_size;
}
return (char*)memcpy(dst, (const void*)src, src_size);
}
const char* ImStrchrRange(const char* str, const char* str_end, char c)
{
const char* p = (const char*)memchr(str, (int)c, str_end - str);
return p;
}
int ImStrlenW(const ImWchar* str)
{
//return (int)wcslen((const wchar_t*)str); // FIXME-OPT: Could use this when wchar_t are 16-bits
int n = 0;
while (*str++) n++;
return n;
}
// Find end-of-line. Return pointer will point to either first \n, either str_end.
const char* ImStreolRange(const char* str, const char* str_end)
{
const char* p = (const char*)memchr(str, '\n', str_end - str);
return p ? p : str_end;
}
const ImWchar* ImStrbolW(const ImWchar* buf_mid_line, const ImWchar* buf_begin) // find beginning-of-line
{
while (buf_mid_line > buf_begin && buf_mid_line[-1] != '\n')
buf_mid_line--;
return buf_mid_line;
}
const char* ImStristr(const char* haystack, const char* haystack_end, const char* needle, const char* needle_end)
{
if (!needle_end)
needle_end = needle + strlen(needle);
const char un0 = (char)toupper(*needle);
while ((!haystack_end && *haystack) || (haystack_end && haystack < haystack_end))
{
if (toupper(*haystack) == un0)
{
const char* b = needle + 1;
for (const char* a = haystack + 1; b < needle_end; a++, b++)
if (toupper(*a) != toupper(*b))
break;
if (b == needle_end)
return haystack;
}
haystack++;
}
return NULL;
}
// Trim str by offsetting contents when there's leading data + writing a \0 at the trailing position. We use this in situation where the cost is negligible.
void ImStrTrimBlanks(char* buf)
{
char* p = buf;
while (p[0] == ' ' || p[0] == '\t') // Leading blanks
p++;
char* p_start = p;
while (*p != 0) // Find end of string
p++;
while (p > p_start && (p[-1] == ' ' || p[-1] == '\t')) // Trailing blanks
p--;
if (p_start != buf) // Copy memory if we had leading blanks
memmove(buf, p_start, p - p_start);
buf[p - p_start] = 0; // Zero terminate
}
// A) MSVC version appears to return -1 on overflow, whereas glibc appears to return total count (which may be >= buf_size).
// Ideally we would test for only one of those limits at runtime depending on the behavior the vsnprintf(), but trying to deduct it at compile time sounds like a pandora can of worm.
// B) When buf==NULL vsnprintf() will return the output size.
#ifndef IMGUI_DISABLE_FORMAT_STRING_FUNCTIONS
//#define IMGUI_USE_STB_SPRINTF
#ifdef IMGUI_USE_STB_SPRINTF
#define STB_SPRINTF_IMPLEMENTATION
#include "imstb_sprintf.hpp"
#endif
#if defined(_MSC_VER) && !defined(vsnprintf)
#define vsnprintf _vsnprintf
#endif
int ImFormatString(char* buf, size_t buf_size, const char* fmt, ...)
{
va_list args;
va_start(args, fmt);
#ifdef IMGUI_USE_STB_SPRINTF
int w = stbsp_vsnprintf(buf, (int)buf_size, fmt, args);
#else
int w = vsnprintf(buf, buf_size, fmt, args);
#endif
va_end(args);
if (buf == NULL)
return w;
if (w == -1 || w >= (int)buf_size)
w = (int)buf_size - 1;
buf[w] = 0;
return w;
}
int ImFormatStringV(char* buf, size_t buf_size, const char* fmt, va_list args)
{
#ifdef IMGUI_USE_STB_SPRINTF
int w = stbsp_vsnprintf(buf, (int)buf_size, fmt, args);
#else
int w = vsnprintf(buf, buf_size, fmt, args);
#endif
if (buf == NULL)
return w;
if (w == -1 || w >= (int)buf_size)
w = (int)buf_size - 1;
buf[w] = 0;
return w;
}
#endif // #ifdef IMGUI_DISABLE_FORMAT_STRING_FUNCTIONS
// CRC32 needs a 1KB lookup table (not cache friendly)
// Although the code to generate the table is simple and shorter than the table itself, using a const table allows us to easily:
// - avoid an unnecessary branch/memory tap, - keep the ImHashXXX functions usable by static constructors, - make it thread-safe.
static const ImU32 GCrc32LookupTable[256] =
{
0x00000000,0x77073096,0xEE0E612C,0x990951BA,0x076DC419,0x706AF48F,0xE963A535,0x9E6495A3,0x0EDB8832,0x79DCB8A4,0xE0D5E91E,0x97D2D988,0x09B64C2B,0x7EB17CBD,0xE7B82D07,0x90BF1D91,
0x1DB71064,0x6AB020F2,0xF3B97148,0x84BE41DE,0x1ADAD47D,0x6DDDE4EB,0xF4D4B551,0x83D385C7,0x136C9856,0x646BA8C0,0xFD62F97A,0x8A65C9EC,0x14015C4F,0x63066CD9,0xFA0F3D63,0x8D080DF5,
0x3B6E20C8,0x4C69105E,0xD56041E4,0xA2677172,0x3C03E4D1,0x4B04D447,0xD20D85FD,0xA50AB56B,0x35B5A8FA,0x42B2986C,0xDBBBC9D6,0xACBCF940,0x32D86CE3,0x45DF5C75,0xDCD60DCF,0xABD13D59,
0x26D930AC,0x51DE003A,0xC8D75180,0xBFD06116,0x21B4F4B5,0x56B3C423,0xCFBA9599,0xB8BDA50F,0x2802B89E,0x5F058808,0xC60CD9B2,0xB10BE924,0x2F6F7C87,0x58684C11,0xC1611DAB,0xB6662D3D,
0x76DC4190,0x01DB7106,0x98D220BC,0xEFD5102A,0x71B18589,0x06B6B51F,0x9FBFE4A5,0xE8B8D433,0x7807C9A2,0x0F00F934,0x9609A88E,0xE10E9818,0x7F6A0DBB,0x086D3D2D,0x91646C97,0xE6635C01,
0x6B6B51F4,0x1C6C6162,0x856530D8,0xF262004E,0x6C0695ED,0x1B01A57B,0x8208F4C1,0xF50FC457,0x65B0D9C6,0x12B7E950,0x8BBEB8EA,0xFCB9887C,0x62DD1DDF,0x15DA2D49,0x8CD37CF3,0xFBD44C65,
0x4DB26158,0x3AB551CE,0xA3BC0074,0xD4BB30E2,0x4ADFA541,0x3DD895D7,0xA4D1C46D,0xD3D6F4FB,0x4369E96A,0x346ED9FC,0xAD678846,0xDA60B8D0,0x44042D73,0x33031DE5,0xAA0A4C5F,0xDD0D7CC9,
0x5005713C,0x270241AA,0xBE0B1010,0xC90C2086,0x5768B525,0x206F85B3,0xB966D409,0xCE61E49F,0x5EDEF90E,0x29D9C998,0xB0D09822,0xC7D7A8B4,0x59B33D17,0x2EB40D81,0xB7BD5C3B,0xC0BA6CAD,
0xEDB88320,0x9ABFB3B6,0x03B6E20C,0x74B1D29A,0xEAD54739,0x9DD277AF,0x04DB2615,0x73DC1683,0xE3630B12,0x94643B84,0x0D6D6A3E,0x7A6A5AA8,0xE40ECF0B,0x9309FF9D,0x0A00AE27,0x7D079EB1,
0xF00F9344,0x8708A3D2,0x1E01F268,0x6906C2FE,0xF762575D,0x806567CB,0x196C3671,0x6E6B06E7,0xFED41B76,0x89D32BE0,0x10DA7A5A,0x67DD4ACC,0xF9B9DF6F,0x8EBEEFF9,0x17B7BE43,0x60B08ED5,
0xD6D6A3E8,0xA1D1937E,0x38D8C2C4,0x4FDFF252,0xD1BB67F1,0xA6BC5767,0x3FB506DD,0x48B2364B,0xD80D2BDA,0xAF0A1B4C,0x36034AF6,0x41047A60,0xDF60EFC3,0xA867DF55,0x316E8EEF,0x4669BE79,
0xCB61B38C,0xBC66831A,0x256FD2A0,0x5268E236,0xCC0C7795,0xBB0B4703,0x220216B9,0x5505262F,0xC5BA3BBE,0xB2BD0B28,0x2BB45A92,0x5CB36A04,0xC2D7FFA7,0xB5D0CF31,0x2CD99E8B,0x5BDEAE1D,
0x9B64C2B0,0xEC63F226,0x756AA39C,0x026D930A,0x9C0906A9,0xEB0E363F,0x72076785,0x05005713,0x95BF4A82,0xE2B87A14,0x7BB12BAE,0x0CB61B38,0x92D28E9B,0xE5D5BE0D,0x7CDCEFB7,0x0BDBDF21,
0x86D3D2D4,0xF1D4E242,0x68DDB3F8,0x1FDA836E,0x81BE16CD,0xF6B9265B,0x6FB077E1,0x18B74777,0x88085AE6,0xFF0F6A70,0x66063BCA,0x11010B5C,0x8F659EFF,0xF862AE69,0x616BFFD3,0x166CCF45,
0xA00AE278,0xD70DD2EE,0x4E048354,0x3903B3C2,0xA7672661,0xD06016F7,0x4969474D,0x3E6E77DB,0xAED16A4A,0xD9D65ADC,0x40DF0B66,0x37D83BF0,0xA9BCAE53,0xDEBB9EC5,0x47B2CF7F,0x30B5FFE9,
0xBDBDF21C,0xCABAC28A,0x53B39330,0x24B4A3A6,0xBAD03605,0xCDD70693,0x54DE5729,0x23D967BF,0xB3667A2E,0xC4614AB8,0x5D681B02,0x2A6F2B94,0xB40BBE37,0xC30C8EA1,0x5A05DF1B,0x2D02EF8D,
};
// Known size hash
// It is ok to call ImHashData on a string with known length but the ### operator won't be supported.
// FIXME-OPT: Replace with e.g. FNV1a hash? CRC32 pretty much randomly access 1KB. Need to do proper measurements.
ImU32 ImHashData(const void* data_p, size_t data_size, ImU32 seed)
{
ImU32 crc = ~seed;
const unsigned char* data = (const unsigned char*)data_p;
const ImU32* crc32_lut = GCrc32LookupTable;
while (data_size-- != 0)
crc = (crc >> 8) ^ crc32_lut[(crc & 0xFF) ^ *data++];
return ~crc;
}
// Zero-terminated string hash, with support for ### to reset back to seed value
// We support a syntax of "label###id" where only "###id" is included in the hash, and only "label" gets displayed.
// Because this syntax is rarely used we are optimizing for the common case.
// - If we reach ### in the string we discard the hash so far and reset to the seed.
// - We don't do 'current += 2; continue;' after handling ### to keep the code smaller/faster (measured ~10% diff in Debug build)
// FIXME-OPT: Replace with e.g. FNV1a hash? CRC32 pretty much randomly access 1KB. Need to do proper measurements.
ImU32 ImHashStr(const char* data_p, size_t data_size, ImU32 seed)
{
seed = ~seed;
ImU32 crc = seed;
const unsigned char* data = (const unsigned char*)data_p;
const ImU32* crc32_lut = GCrc32LookupTable;
if (data_size != 0)
{
while (data_size-- != 0)
{
unsigned char c = *data++;
if (c == '#' && data_size >= 2 && data[0] == '#' && data[1] == '#')
crc = seed;
crc = (crc >> 8) ^ crc32_lut[(crc & 0xFF) ^ c];
}
}
else
{
while (unsigned char c = *data++)
{
if (c == '#' && data[0] == '#' && data[1] == '#')
crc = seed;
crc = (crc >> 8) ^ crc32_lut[(crc & 0xFF) ^ c];
}
}
return ~crc;
}
FILE* ImFileOpen(const char* filename, const char* mode)
{
#if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__GNUC__)
// We need a fopen() wrapper because MSVC/Windows fopen doesn't handle UTF-8 filenames. Converting both strings from UTF-8 to wchar format (using a single allocation, because we can)
const int filename_wsize = ImTextCountCharsFromUtf8(filename, NULL) + 1;
const int mode_wsize = ImTextCountCharsFromUtf8(mode, NULL) + 1;
ImVector<ImWchar> buf;
buf.resize(filename_wsize + mode_wsize);
ImTextStrFromUtf8(&buf[0], filename_wsize, filename, NULL);
ImTextStrFromUtf8(&buf[filename_wsize], mode_wsize, mode, NULL);
return _wfopen((wchar_t*)&buf[0], (wchar_t*)&buf[filename_wsize]);
#else
return fopen(filename, mode);
#endif
}
// Load file content into memory
// Memory allocated with IM_ALLOC(), must be freed by user using IM_FREE() == ImGui::MemFree()
void* ImFileLoadToMemory(const char* filename, const char* file_open_mode, size_t* out_file_size, int padding_bytes)
{
IM_ASSERT(filename && file_open_mode);
if (out_file_size)
*out_file_size = 0;
FILE* f;
if ((f = ImFileOpen(filename, file_open_mode)) == NULL)
return NULL;
long file_size_signed;
if (fseek(f, 0, SEEK_END) || (file_size_signed = ftell(f)) == -1 || fseek(f, 0, SEEK_SET))
{
fclose(f);
return NULL;
}
size_t file_size = (size_t)file_size_signed;
void* file_data = IM_ALLOC(file_size + padding_bytes);
if (file_data == NULL)
{
fclose(f);
return NULL;
}
if (fread(file_data, 1, file_size, f) != file_size)
{
fclose(f);
IM_FREE(file_data);
return NULL;
}
if (padding_bytes > 0)
memset((void*)(((char*)file_data) + file_size), 0, (size_t)padding_bytes);
fclose(f);
if (out_file_size)
*out_file_size = file_size;
return file_data;
}
//-----------------------------------------------------------------------------
// [SECTION] MISC HELPERS/UTILITIES (ImText* functions)
//-----------------------------------------------------------------------------
// Convert UTF-8 to 32-bits character, process single character input.
// Based on stb_from_utf8() from github.com/nothings/stb/
// We handle UTF-8 decoding error by skipping forward.
int ImTextCharFromUtf8(unsigned int* out_char, const char* in_text, const char* in_text_end)
{
unsigned int c = (unsigned int)-1;
const unsigned char* str = (const unsigned char*)in_text;
if (!(*str & 0x80))
{
c = (unsigned int)(*str++);
*out_char = c;
return 1;
}
if ((*str & 0xe0) == 0xc0)
{
*out_char = 0xFFFD; // will be invalid but not end of string
if (in_text_end && in_text_end - (const char*)str < 2) return 1;
if (*str < 0xc2) return 2;
c = (unsigned int)((*str++ & 0x1f) << 6);
if ((*str & 0xc0) != 0x80) return 2;
c += (*str++ & 0x3f);
*out_char = c;
return 2;
}
if ((*str & 0xf0) == 0xe0)
{
*out_char = 0xFFFD; // will be invalid but not end of string
if (in_text_end && in_text_end - (const char*)str < 3) return 1;
if (*str == 0xe0 && (str[1] < 0xa0 || str[1] > 0xbf)) return 3;
if (*str == 0xed && str[1] > 0x9f) return 3; // str[1] < 0x80 is checked below
c = (unsigned int)((*str++ & 0x0f) << 12);
if ((*str & 0xc0) != 0x80) return 3;
c += (unsigned int)((*str++ & 0x3f) << 6);
if ((*str & 0xc0) != 0x80) return 3;
c += (*str++ & 0x3f);
*out_char = c;
return 3;
}
if ((*str & 0xf8) == 0xf0)
{
*out_char = 0xFFFD; // will be invalid but not end of string
if (in_text_end && in_text_end - (const char*)str < 4) return 1;
if (*str > 0xf4) return 4;
if (*str == 0xf0 && (str[1] < 0x90 || str[1] > 0xbf)) return 4;
if (*str == 0xf4 && str[1] > 0x8f) return 4; // str[1] < 0x80 is checked below
c = (unsigned int)((*str++ & 0x07) << 18);
if ((*str & 0xc0) != 0x80) return 4;
c += (unsigned int)((*str++ & 0x3f) << 12);
if ((*str & 0xc0) != 0x80) return 4;
c += (unsigned int)((*str++ & 0x3f) << 6);
if ((*str & 0xc0) != 0x80) return 4;
c += (*str++ & 0x3f);
// utf-8 encodings of values used in surrogate pairs are invalid
if ((c & 0xFFFFF800) == 0xD800) return 4;
*out_char = c;
return 4;
}
*out_char = 0;
return 0;
}
int ImTextStrFromUtf8(ImWchar* buf, int buf_size, const char* in_text, const char* in_text_end, const char** in_text_remaining)
{
ImWchar* buf_out = buf;
ImWchar* buf_end = buf + buf_size;
while (buf_out < buf_end - 1 && (!in_text_end || in_text < in_text_end) && *in_text)
{
unsigned int c;
in_text += ImTextCharFromUtf8(&c, in_text, in_text_end);
if (c == 0)
break;
if (c < 0x10000) // FIXME: Losing characters that don't fit in 2 bytes
*buf_out++ = (ImWchar)c;
}
*buf_out = 0;
if (in_text_remaining)
*in_text_remaining = in_text;
return (int)(buf_out - buf);
}
int ImTextCountCharsFromUtf8(const char* in_text, const char* in_text_end)
{
int char_count = 0;
while ((!in_text_end || in_text < in_text_end) && *in_text)
{
unsigned int c;
in_text += ImTextCharFromUtf8(&c, in_text, in_text_end);
if (c == 0)
break;
if (c < 0x10000)
char_count++;
}
return char_count;
}
// Based on stb_to_utf8() from github.com/nothings/stb/
static inline int ImTextCharToUtf8(char* buf, int buf_size, unsigned int c)
{
if (c < 0x80)
{
buf[0] = (char)c;
return 1;
}
if (c < 0x800)
{
if (buf_size < 2) return 0;
buf[0] = (char)(0xc0 + (c >> 6));
buf[1] = (char)(0x80 + (c & 0x3f));
return 2;
}
if (c >= 0xdc00 && c < 0xe000)
{
return 0;
}
if (c >= 0xd800 && c < 0xdc00)
{
if (buf_size < 4) return 0;
buf[0] = (char)(0xf0 + (c >> 18));
buf[1] = (char)(0x80 + ((c >> 12) & 0x3f));
buf[2] = (char)(0x80 + ((c >> 6) & 0x3f));
buf[3] = (char)(0x80 + ((c) & 0x3f));
return 4;
}
//else if (c < 0x10000)
{
if (buf_size < 3) return 0;
buf[0] = (char)(0xe0 + (c >> 12));
buf[1] = (char)(0x80 + ((c >> 6) & 0x3f));
buf[2] = (char)(0x80 + ((c) & 0x3f));
return 3;
}
}
// Not optimal but we very rarely use this function.
int ImTextCountUtf8BytesFromChar(const char* in_text, const char* in_text_end)
{
unsigned int dummy = 0;
return ImTextCharFromUtf8(&dummy, in_text, in_text_end);
}
static inline int ImTextCountUtf8BytesFromChar(unsigned int c)
{
if (c < 0x80) return 1;
if (c < 0x800) return 2;
if (c >= 0xdc00 && c < 0xe000) return 0;
if (c >= 0xd800 && c < 0xdc00) return 4;
return 3;
}
int ImTextStrToUtf8(char* buf, int buf_size, const ImWchar* in_text, const ImWchar* in_text_end)
{
char* buf_out = buf;
const char* buf_end = buf + buf_size;
while (buf_out < buf_end - 1 && (!in_text_end || in_text < in_text_end) && *in_text)
{
unsigned int c = (unsigned int)(*in_text++);
if (c < 0x80)
*buf_out++ = (char)c;
else
buf_out += ImTextCharToUtf8(buf_out, (int)(buf_end - buf_out - 1), c);
}
*buf_out = 0;
return (int)(buf_out - buf);
}
int ImTextCountUtf8BytesFromStr(const ImWchar* in_text, const ImWchar* in_text_end)
{
int bytes_count = 0;
while ((!in_text_end || in_text < in_text_end) && *in_text)
{
unsigned int c = (unsigned int)(*in_text++);
if (c < 0x80)
bytes_count++;
else
bytes_count += ImTextCountUtf8BytesFromChar(c);
}
return bytes_count;
}
//-----------------------------------------------------------------------------
// [SECTION] MISC HELPERS/UTILTIES (Color functions)
// Note: The Convert functions are early design which are not consistent with other API.
//-----------------------------------------------------------------------------
ImVec4 ImGui::ColorConvertU32ToFloat4(ImU32 in)
{
float s = 1.0f / 255.0f;
return ImVec4(
((in >> IM_COL32_R_SHIFT) & 0xFF) * s,
((in >> IM_COL32_G_SHIFT) & 0xFF) * s,
((in >> IM_COL32_B_SHIFT) & 0xFF) * s,
((in >> IM_COL32_A_SHIFT) & 0xFF) * s);
}
ImU32 ImGui::ColorConvertFloat4ToU32(const ImVec4& in)
{
ImU32 out;
out = ((ImU32)IM_F32_TO_INT8_SAT(in.x)) << IM_COL32_R_SHIFT;
out |= ((ImU32)IM_F32_TO_INT8_SAT(in.y)) << IM_COL32_G_SHIFT;
out |= ((ImU32)IM_F32_TO_INT8_SAT(in.z)) << IM_COL32_B_SHIFT;
out |= ((ImU32)IM_F32_TO_INT8_SAT(in.w)) << IM_COL32_A_SHIFT;
return out;
}
// Convert rgb floats ([0-1],[0-1],[0-1]) to hsv floats ([0-1],[0-1],[0-1]), from Foley & van Dam p592
// Optimized http://lolengine.net/blog/2013/01/13/fast-rgb-to-hsv
void ImGui::ColorConvertRGBtoHSV(float r, float g, float b, float& out_h, float& out_s, float& out_v)
{
float K = 0.f;
if (g < b)
{
ImSwap(g, b);
K = -1.f;
}
if (r < g)
{
ImSwap(r, g);
K = -2.f / 6.f - K;
}
const float chroma = r - (g < b ? g : b);
out_h = ImFabs(K + (g - b) / (6.f * chroma + 1e-20f));
out_s = chroma / (r + 1e-20f);
out_v = r;
}
// Convert hsv floats ([0-1],[0-1],[0-1]) to rgb floats ([0-1],[0-1],[0-1]), from Foley & van Dam p593
// also http://en.wikipedia.org/wiki/HSL_and_HSV
void ImGui::ColorConvertHSVtoRGB(float h, float s, float v, float& out_r, float& out_g, float& out_b)
{
if (s == 0.0f)
{
// gray
out_r = out_g = out_b = v;
return;
}
h = ImFmod(h, 1.0f) / (60.0f / 360.0f);
int i = (int)h;
float f = h - (float)i;
float p = v * (1.0f - s);
float q = v * (1.0f - s * f);
float t = v * (1.0f - s * (1.0f - f));
switch (i)
{
case 0: out_r = v; out_g = t; out_b = p; break;
case 1: out_r = q; out_g = v; out_b = p; break;
case 2: out_r = p; out_g = v; out_b = t; break;
case 3: out_r = p; out_g = q; out_b = v; break;
case 4: out_r = t; out_g = p; out_b = v; break;
case 5: default: out_r = v; out_g = p; out_b = q; break;
}
}
ImU32 ImGui::GetColorU32(ImGuiCol idx, float alpha_mul)
{
ImGuiStyle& style = GImGui->Style;
ImVec4 c = style.Colors[idx];
c.w *= style.Alpha * alpha_mul;
return ColorConvertFloat4ToU32(c);
}
ImU32 ImGui::GetColorU32(const ImVec4& col)
{
ImGuiStyle& style = GImGui->Style;
ImVec4 c = col;
c.w *= style.Alpha;
return ColorConvertFloat4ToU32(c);
}
const ImVec4& ImGui::GetStyleColorVec4(ImGuiCol idx)
{
ImGuiStyle& style = GImGui->Style;
return style.Colors[idx];
}
ImU32 ImGui::GetColorU32(ImU32 col)
{
float style_alpha = GImGui->Style.Alpha;
if (style_alpha >= 1.0f)
return col;
ImU32 a = (col & IM_COL32_A_MASK) >> IM_COL32_A_SHIFT;
a = (ImU32)(a * style_alpha); // We don't need to clamp 0..255 because Style.Alpha is in 0..1 range.
return (col & ~IM_COL32_A_MASK) | (a << IM_COL32_A_SHIFT);
}
//-----------------------------------------------------------------------------
// [SECTION] ImGuiStorage
// Helper: Key->value storage
//-----------------------------------------------------------------------------
// std::lower_bound but without the bullshit
static ImGuiStorage::ImGuiStoragePair* LowerBound(ImVector<ImGuiStorage::ImGuiStoragePair>& data, ImGuiID key)
{
ImGuiStorage::ImGuiStoragePair* first = data.Data;
ImGuiStorage::ImGuiStoragePair* last = data.Data + data.Size;
size_t count = (size_t)(last - first);
while (count > 0)
{
size_t count2 = count >> 1;
ImGuiStorage::ImGuiStoragePair* mid = first + count2;
if (mid->key < key)
{
first = ++mid;
count -= count2 + 1;
}
else
{
count = count2;
}
}
return first;
}
// For quicker full rebuild of a storage (instead of an incremental one), you may add all your contents and then sort once.
void ImGuiStorage::BuildSortByKey()
{
/* struct StaticFunc
{
static int IMGUI_CDECL PairCompareByID(const void* lhs, const void* rhs)
{
// We can't just do a subtraction because qsort uses signed integers and subtracting our ID doesn't play well with that.
if (((const ImGuiStoragePair*)lhs)->key > ((const ImGuiStoragePair*)rhs)->key) return +1;
if (((const ImGuiStoragePair*)lhs)->key < ((const ImGuiStoragePair*)rhs)->key) return -1;
return 0;
}
};
if (Data.Size > 1)
ImQsort(Data.Data, (size_t)Data.Size, sizeof(ImGuiStoragePair), StaticFunc::PairCompareByID);*/
}
int ImGuiStorage::GetInt(ImGuiID key, int default_val) const
{
ImGuiStoragePair* it = LowerBound(const_cast<ImVector<ImGuiStoragePair>&>(Data), key);
if (it == Data.end() || it->key != key)
return default_val;
return it->val_i;
}
bool ImGuiStorage::GetBool(ImGuiID key, bool default_val) const
{
return GetInt(key, default_val ? 1 : 0) != 0;
}
float ImGuiStorage::GetFloat(ImGuiID key, float default_val) const
{
ImGuiStoragePair* it = LowerBound(const_cast<ImVector<ImGuiStoragePair>&>(Data), key);
if (it == Data.end() || it->key != key)
return default_val;
return it->val_f;
}
void* ImGuiStorage::GetVoidPtr(ImGuiID key) const
{
ImGuiStoragePair* it = LowerBound(const_cast<ImVector<ImGuiStoragePair>&>(Data), key);
if (it == Data.end() || it->key != key)
return NULL;
return it->val_p;
}
// 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.
int* ImGuiStorage::GetIntRef(ImGuiID key, int default_val)
{
ImGuiStoragePair* it = LowerBound(Data, key);
if (it == Data.end() || it->key != key)
it = Data.insert(it, ImGuiStoragePair(key, default_val));
return &it->val_i;
}
bool* ImGuiStorage::GetBoolRef(ImGuiID key, bool default_val)
{
return (bool*)GetIntRef(key, default_val ? 1 : 0);
}
float* ImGuiStorage::GetFloatRef(ImGuiID key, float default_val)