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skia / external / github.com / ocornut / imgui / refs/heads/features/tex_round_corners / . / imgui_draw.cpp
blob: d5afbe2eed16c820cfd78d51a231fee32ae05343 [file] [log] [blame]
// dear imgui, v1.90 WIP
// (drawing and font code)
/*
Index of this file:
// [SECTION] STB libraries implementation
// [SECTION] Style functions
// [SECTION] ImDrawList
// [SECTION] ImDrawListSplitter
// [SECTION] ImDrawData
// [SECTION] Helpers ShadeVertsXXX functions
// [SECTION] ImFontConfig
// [SECTION] ImFontAtlas
// [SECTION] ImFontAtlas glyph ranges helpers
// [SECTION] ImFontGlyphRangesBuilder
// [SECTION] ImFont
// [SECTION] ImGui Internal Render Helpers
// [SECTION] Decompression code
// [SECTION] Default font data (ProggyClean.ttf)
*/
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
#ifndef IMGUI_DEFINE_MATH_OPERATORS
#define IMGUI_DEFINE_MATH_OPERATORS
#endif
#include "imgui.h"
#ifndef IMGUI_DISABLE
#include "imgui_internal.h"
#ifdef IMGUI_ENABLE_FREETYPE
#include "misc/freetype/imgui_freetype.h"
#endif
#include <stdio.h> // vsnprintf, sscanf, printf
// Visual Studio warnings
#ifdef _MSC_VER
#pragma warning (disable: 4127) // condition expression is constant
#pragma warning (disable: 4505) // unreferenced local function has been removed (stb stuff)
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
#pragma warning (disable: 26451) // [Static Analyzer] Arithmetic overflow : Using operator 'xxx' on a 4 byte value and then casting the result to a 8 byte value. Cast the value to the wider type before calling operator 'xxx' to avoid overflow(io.2).
#pragma warning (disable: 26812) // [Static Analyzer] The enum type 'xxx' is unscoped. Prefer 'enum class' over 'enum' (Enum.3). [MSVC Static Analyzer)
#endif
// Clang/GCC warnings with -Weverything
#if defined(__clang__)
#if __has_warning("-Wunknown-warning-option")
#pragma clang diagnostic ignored "-Wunknown-warning-option" // warning: unknown warning group 'xxx' // not all warnings are known by all Clang versions and they tend to be rename-happy.. so ignoring warnings triggers new warnings on some configuration. Great!
#endif
#pragma clang diagnostic ignored "-Wunknown-pragmas" // warning: unknown warning group 'xxx'
#pragma clang diagnostic ignored "-Wold-style-cast" // warning: use of old-style cast // yes, they are more terse.
#pragma clang diagnostic ignored "-Wfloat-equal" // warning: comparing floating point with == or != is unsafe // storing and comparing against same constants ok.
#pragma clang diagnostic ignored "-Wglobal-constructors" // warning: declaration requires a global destructor // similar to above, not sure what the exact difference is.
#pragma clang diagnostic ignored "-Wsign-conversion" // warning: implicit conversion changes signedness
#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant" // warning: zero as null pointer constant // some standard header variations use #define NULL 0
#pragma clang diagnostic ignored "-Wcomma" // warning: possible misuse of comma operator here
#pragma clang diagnostic ignored "-Wreserved-id-macro" // warning: macro name is a reserved identifier
#pragma clang diagnostic ignored "-Wdouble-promotion" // warning: implicit conversion from 'float' to 'double' when passing argument to function // using printf() is a misery with this as C++ va_arg ellipsis changes float to double.
#pragma clang diagnostic ignored "-Wimplicit-int-float-conversion" // warning: implicit conversion from 'xxx' to 'float' may lose precision
#pragma clang diagnostic ignored "-Wreserved-identifier" // warning: identifier '_Xxx' is reserved because it starts with '_' followed by a capital letter
#elif defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wpragmas" // warning: unknown option after '#pragma GCC diagnostic' kind
#pragma GCC diagnostic ignored "-Wunused-function" // warning: 'xxxx' defined but not used
#pragma GCC diagnostic ignored "-Wdouble-promotion" // warning: implicit conversion from 'float' to 'double' when passing argument to function
#pragma GCC diagnostic ignored "-Wconversion" // warning: conversion to 'xxxx' from 'xxxx' may alter its value
#pragma GCC diagnostic ignored "-Wstack-protector" // warning: stack protector not protecting local variables: variable length buffer
#pragma GCC diagnostic ignored "-Wclass-memaccess" // [__GNUC__ >= 8] warning: 'memset/memcpy' clearing/writing an object of type 'xxxx' with no trivial copy-assignment; use assignment or value-initialization instead
#endif
//-------------------------------------------------------------------------
// [SECTION] STB libraries implementation (for stb_truetype and stb_rect_pack)
//-------------------------------------------------------------------------
// Compile time options:
//#define IMGUI_STB_NAMESPACE ImStb
//#define IMGUI_STB_TRUETYPE_FILENAME "my_folder/stb_truetype.h"
//#define IMGUI_STB_RECT_PACK_FILENAME "my_folder/stb_rect_pack.h"
//#define IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
//#define IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION
#ifdef IMGUI_STB_NAMESPACE
namespace IMGUI_STB_NAMESPACE
{
#endif
#ifdef _MSC_VER
#pragma warning (push)
#pragma warning (disable: 4456) // declaration of 'xx' hides previous local declaration
#pragma warning (disable: 6011) // (stb_rectpack) Dereferencing NULL pointer 'cur->next'.
#pragma warning (disable: 6385) // (stb_truetype) Reading invalid data from 'buffer': the readable size is '_Old_3`kernel_width' bytes, but '3' bytes may be read.
#pragma warning (disable: 28182) // (stb_rectpack) Dereferencing NULL pointer. 'cur' contains the same NULL value as 'cur->next' did.
#endif
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-function"
#pragma clang diagnostic ignored "-Wmissing-prototypes"
#pragma clang diagnostic ignored "-Wimplicit-fallthrough"
#pragma clang diagnostic ignored "-Wcast-qual" // warning: cast from 'const xxxx *' to 'xxx *' drops const qualifier
#endif
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wtype-limits" // warning: comparison is always true due to limited range of data type [-Wtype-limits]
#pragma GCC diagnostic ignored "-Wcast-qual" // warning: cast from type 'const xxxx *' to type 'xxxx *' casts away qualifiers
#endif
#ifndef STB_RECT_PACK_IMPLEMENTATION // in case the user already have an implementation in the _same_ compilation unit (e.g. unity builds)
#ifndef IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION // in case the user already have an implementation in another compilation unit
#define STBRP_STATIC
#define STBRP_ASSERT(x) do { IM_ASSERT(x); } while (0)
#define STBRP_SORT ImQsort
#define STB_RECT_PACK_IMPLEMENTATION
#endif
#ifdef IMGUI_STB_RECT_PACK_FILENAME
#include IMGUI_STB_RECT_PACK_FILENAME
#else
#include "imstb_rectpack.h"
#endif
#endif
#ifdef IMGUI_ENABLE_STB_TRUETYPE
#ifndef STB_TRUETYPE_IMPLEMENTATION // in case the user already have an implementation in the _same_ compilation unit (e.g. unity builds)
#ifndef IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION // in case the user already have an implementation in another compilation unit
#define STBTT_malloc(x,u) ((void)(u), IM_ALLOC(x))
#define STBTT_free(x,u) ((void)(u), IM_FREE(x))
#define STBTT_assert(x) do { IM_ASSERT(x); } while(0)
#define STBTT_fmod(x,y) ImFmod(x,y)
#define STBTT_sqrt(x) ImSqrt(x)
#define STBTT_pow(x,y) ImPow(x,y)
#define STBTT_fabs(x) ImFabs(x)
#define STBTT_ifloor(x) ((int)ImFloor(x))
#define STBTT_iceil(x) ((int)ImCeil(x))
#define STBTT_STATIC
#define STB_TRUETYPE_IMPLEMENTATION
#else
#define STBTT_DEF extern
#endif
#ifdef IMGUI_STB_TRUETYPE_FILENAME
#include IMGUI_STB_TRUETYPE_FILENAME
#else
#include "imstb_truetype.h"
#endif
#endif
#endif // IMGUI_ENABLE_STB_TRUETYPE
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
#if defined(__clang__)
#pragma clang diagnostic pop
#endif
#if defined(_MSC_VER)
#pragma warning (pop)
#endif
#ifdef IMGUI_STB_NAMESPACE
} // namespace ImStb
using namespace IMGUI_STB_NAMESPACE;
#endif
//-----------------------------------------------------------------------------
// [SECTION] Style functions
//-----------------------------------------------------------------------------
void ImGui::StyleColorsDark(ImGuiStyle* dst)
{
ImGuiStyle* style = dst ? dst : &ImGui::GetStyle();
ImVec4* colors = style->Colors;
colors[ImGuiCol_Text] = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
colors[ImGuiCol_TextDisabled] = ImVec4(0.50f, 0.50f, 0.50f, 1.00f);
colors[ImGuiCol_WindowBg] = ImVec4(0.06f, 0.06f, 0.06f, 0.94f);
colors[ImGuiCol_ChildBg] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_PopupBg] = ImVec4(0.08f, 0.08f, 0.08f, 0.94f);
colors[ImGuiCol_Border] = ImVec4(0.43f, 0.43f, 0.50f, 0.50f);
colors[ImGuiCol_BorderShadow] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_FrameBg] = ImVec4(0.16f, 0.29f, 0.48f, 0.54f);
colors[ImGuiCol_FrameBgHovered] = ImVec4(0.26f, 0.59f, 0.98f, 0.40f);
colors[ImGuiCol_FrameBgActive] = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
colors[ImGuiCol_TitleBg] = ImVec4(0.04f, 0.04f, 0.04f, 1.00f);
colors[ImGuiCol_TitleBgActive] = ImVec4(0.16f, 0.29f, 0.48f, 1.00f);
colors[ImGuiCol_TitleBgCollapsed] = ImVec4(0.00f, 0.00f, 0.00f, 0.51f);
colors[ImGuiCol_MenuBarBg] = ImVec4(0.14f, 0.14f, 0.14f, 1.00f);
colors[ImGuiCol_ScrollbarBg] = ImVec4(0.02f, 0.02f, 0.02f, 0.53f);
colors[ImGuiCol_ScrollbarGrab] = ImVec4(0.31f, 0.31f, 0.31f, 1.00f);
colors[ImGuiCol_ScrollbarGrabHovered] = ImVec4(0.41f, 0.41f, 0.41f, 1.00f);
colors[ImGuiCol_ScrollbarGrabActive] = ImVec4(0.51f, 0.51f, 0.51f, 1.00f);
colors[ImGuiCol_CheckMark] = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_SliderGrab] = ImVec4(0.24f, 0.52f, 0.88f, 1.00f);
colors[ImGuiCol_SliderGrabActive] = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_Button] = ImVec4(0.26f, 0.59f, 0.98f, 0.40f);
colors[ImGuiCol_ButtonHovered] = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_ButtonActive] = ImVec4(0.06f, 0.53f, 0.98f, 1.00f);
colors[ImGuiCol_Header] = ImVec4(0.26f, 0.59f, 0.98f, 0.31f);
colors[ImGuiCol_HeaderHovered] = ImVec4(0.26f, 0.59f, 0.98f, 0.80f);
colors[ImGuiCol_HeaderActive] = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_Separator] = colors[ImGuiCol_Border];
colors[ImGuiCol_SeparatorHovered] = ImVec4(0.10f, 0.40f, 0.75f, 0.78f);
colors[ImGuiCol_SeparatorActive] = ImVec4(0.10f, 0.40f, 0.75f, 1.00f);
colors[ImGuiCol_ResizeGrip] = ImVec4(0.26f, 0.59f, 0.98f, 0.20f);
colors[ImGuiCol_ResizeGripHovered] = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
colors[ImGuiCol_ResizeGripActive] = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
colors[ImGuiCol_Tab] = ImLerp(colors[ImGuiCol_Header], colors[ImGuiCol_TitleBgActive], 0.80f);
colors[ImGuiCol_TabHovered] = colors[ImGuiCol_HeaderHovered];
colors[ImGuiCol_TabActive] = ImLerp(colors[ImGuiCol_HeaderActive], colors[ImGuiCol_TitleBgActive], 0.60f);
colors[ImGuiCol_TabUnfocused] = ImLerp(colors[ImGuiCol_Tab], colors[ImGuiCol_TitleBg], 0.80f);
colors[ImGuiCol_TabUnfocusedActive] = ImLerp(colors[ImGuiCol_TabActive], colors[ImGuiCol_TitleBg], 0.40f);
colors[ImGuiCol_PlotLines] = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
colors[ImGuiCol_PlotLinesHovered] = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
colors[ImGuiCol_PlotHistogramHovered] = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
colors[ImGuiCol_TableHeaderBg] = ImVec4(0.19f, 0.19f, 0.20f, 1.00f);
colors[ImGuiCol_TableBorderStrong] = ImVec4(0.31f, 0.31f, 0.35f, 1.00f); // Prefer using Alpha=1.0 here
colors[ImGuiCol_TableBorderLight] = ImVec4(0.23f, 0.23f, 0.25f, 1.00f); // Prefer using Alpha=1.0 here
colors[ImGuiCol_TableRowBg] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_TableRowBgAlt] = ImVec4(1.00f, 1.00f, 1.00f, 0.06f);
colors[ImGuiCol_TextSelectedBg] = ImVec4(0.26f, 0.59f, 0.98f, 0.35f);
colors[ImGuiCol_DragDropTarget] = ImVec4(1.00f, 1.00f, 0.00f, 0.90f);
colors[ImGuiCol_NavHighlight] = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_NavWindowingHighlight] = ImVec4(1.00f, 1.00f, 1.00f, 0.70f);
colors[ImGuiCol_NavWindowingDimBg] = ImVec4(0.80f, 0.80f, 0.80f, 0.20f);
colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.80f, 0.80f, 0.80f, 0.35f);
}
void ImGui::StyleColorsClassic(ImGuiStyle* dst)
{
ImGuiStyle* style = dst ? dst : &ImGui::GetStyle();
ImVec4* colors = style->Colors;
colors[ImGuiCol_Text] = ImVec4(0.90f, 0.90f, 0.90f, 1.00f);
colors[ImGuiCol_TextDisabled] = ImVec4(0.60f, 0.60f, 0.60f, 1.00f);
colors[ImGuiCol_WindowBg] = ImVec4(0.00f, 0.00f, 0.00f, 0.85f);
colors[ImGuiCol_ChildBg] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_PopupBg] = ImVec4(0.11f, 0.11f, 0.14f, 0.92f);
colors[ImGuiCol_Border] = ImVec4(0.50f, 0.50f, 0.50f, 0.50f);
colors[ImGuiCol_BorderShadow] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_FrameBg] = ImVec4(0.43f, 0.43f, 0.43f, 0.39f);
colors[ImGuiCol_FrameBgHovered] = ImVec4(0.47f, 0.47f, 0.69f, 0.40f);
colors[ImGuiCol_FrameBgActive] = ImVec4(0.42f, 0.41f, 0.64f, 0.69f);
colors[ImGuiCol_TitleBg] = ImVec4(0.27f, 0.27f, 0.54f, 0.83f);
colors[ImGuiCol_TitleBgActive] = ImVec4(0.32f, 0.32f, 0.63f, 0.87f);
colors[ImGuiCol_TitleBgCollapsed] = ImVec4(0.40f, 0.40f, 0.80f, 0.20f);
colors[ImGuiCol_MenuBarBg] = ImVec4(0.40f, 0.40f, 0.55f, 0.80f);
colors[ImGuiCol_ScrollbarBg] = ImVec4(0.20f, 0.25f, 0.30f, 0.60f);
colors[ImGuiCol_ScrollbarGrab] = ImVec4(0.40f, 0.40f, 0.80f, 0.30f);
colors[ImGuiCol_ScrollbarGrabHovered] = ImVec4(0.40f, 0.40f, 0.80f, 0.40f);
colors[ImGuiCol_ScrollbarGrabActive] = ImVec4(0.41f, 0.39f, 0.80f, 0.60f);
colors[ImGuiCol_CheckMark] = ImVec4(0.90f, 0.90f, 0.90f, 0.50f);
colors[ImGuiCol_SliderGrab] = ImVec4(1.00f, 1.00f, 1.00f, 0.30f);
colors[ImGuiCol_SliderGrabActive] = ImVec4(0.41f, 0.39f, 0.80f, 0.60f);
colors[ImGuiCol_Button] = ImVec4(0.35f, 0.40f, 0.61f, 0.62f);
colors[ImGuiCol_ButtonHovered] = ImVec4(0.40f, 0.48f, 0.71f, 0.79f);
colors[ImGuiCol_ButtonActive] = ImVec4(0.46f, 0.54f, 0.80f, 1.00f);
colors[ImGuiCol_Header] = ImVec4(0.40f, 0.40f, 0.90f, 0.45f);
colors[ImGuiCol_HeaderHovered] = ImVec4(0.45f, 0.45f, 0.90f, 0.80f);
colors[ImGuiCol_HeaderActive] = ImVec4(0.53f, 0.53f, 0.87f, 0.80f);
colors[ImGuiCol_Separator] = ImVec4(0.50f, 0.50f, 0.50f, 0.60f);
colors[ImGuiCol_SeparatorHovered] = ImVec4(0.60f, 0.60f, 0.70f, 1.00f);
colors[ImGuiCol_SeparatorActive] = ImVec4(0.70f, 0.70f, 0.90f, 1.00f);
colors[ImGuiCol_ResizeGrip] = ImVec4(1.00f, 1.00f, 1.00f, 0.10f);
colors[ImGuiCol_ResizeGripHovered] = ImVec4(0.78f, 0.82f, 1.00f, 0.60f);
colors[ImGuiCol_ResizeGripActive] = ImVec4(0.78f, 0.82f, 1.00f, 0.90f);
colors[ImGuiCol_Tab] = ImLerp(colors[ImGuiCol_Header], colors[ImGuiCol_TitleBgActive], 0.80f);
colors[ImGuiCol_TabHovered] = colors[ImGuiCol_HeaderHovered];
colors[ImGuiCol_TabActive] = ImLerp(colors[ImGuiCol_HeaderActive], colors[ImGuiCol_TitleBgActive], 0.60f);
colors[ImGuiCol_TabUnfocused] = ImLerp(colors[ImGuiCol_Tab], colors[ImGuiCol_TitleBg], 0.80f);
colors[ImGuiCol_TabUnfocusedActive] = ImLerp(colors[ImGuiCol_TabActive], colors[ImGuiCol_TitleBg], 0.40f);
colors[ImGuiCol_PlotLines] = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
colors[ImGuiCol_PlotLinesHovered] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
colors[ImGuiCol_PlotHistogramHovered] = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
colors[ImGuiCol_TableHeaderBg] = ImVec4(0.27f, 0.27f, 0.38f, 1.00f);
colors[ImGuiCol_TableBorderStrong] = ImVec4(0.31f, 0.31f, 0.45f, 1.00f); // Prefer using Alpha=1.0 here
colors[ImGuiCol_TableBorderLight] = ImVec4(0.26f, 0.26f, 0.28f, 1.00f); // Prefer using Alpha=1.0 here
colors[ImGuiCol_TableRowBg] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_TableRowBgAlt] = ImVec4(1.00f, 1.00f, 1.00f, 0.07f);
colors[ImGuiCol_TextSelectedBg] = ImVec4(0.00f, 0.00f, 1.00f, 0.35f);
colors[ImGuiCol_DragDropTarget] = ImVec4(1.00f, 1.00f, 0.00f, 0.90f);
colors[ImGuiCol_NavHighlight] = colors[ImGuiCol_HeaderHovered];
colors[ImGuiCol_NavWindowingHighlight] = ImVec4(1.00f, 1.00f, 1.00f, 0.70f);
colors[ImGuiCol_NavWindowingDimBg] = ImVec4(0.80f, 0.80f, 0.80f, 0.20f);
colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.20f, 0.20f, 0.20f, 0.35f);
}
// Those light colors are better suited with a thicker font than the default one + FrameBorder
void ImGui::StyleColorsLight(ImGuiStyle* dst)
{
ImGuiStyle* style = dst ? dst : &ImGui::GetStyle();
ImVec4* colors = style->Colors;
colors[ImGuiCol_Text] = ImVec4(0.00f, 0.00f, 0.00f, 1.00f);
colors[ImGuiCol_TextDisabled] = ImVec4(0.60f, 0.60f, 0.60f, 1.00f);
colors[ImGuiCol_WindowBg] = ImVec4(0.94f, 0.94f, 0.94f, 1.00f);
colors[ImGuiCol_ChildBg] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_PopupBg] = ImVec4(1.00f, 1.00f, 1.00f, 0.98f);
colors[ImGuiCol_Border] = ImVec4(0.00f, 0.00f, 0.00f, 0.30f);
colors[ImGuiCol_BorderShadow] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_FrameBg] = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
colors[ImGuiCol_FrameBgHovered] = ImVec4(0.26f, 0.59f, 0.98f, 0.40f);
colors[ImGuiCol_FrameBgActive] = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
colors[ImGuiCol_TitleBg] = ImVec4(0.96f, 0.96f, 0.96f, 1.00f);
colors[ImGuiCol_TitleBgActive] = ImVec4(0.82f, 0.82f, 0.82f, 1.00f);
colors[ImGuiCol_TitleBgCollapsed] = ImVec4(1.00f, 1.00f, 1.00f, 0.51f);
colors[ImGuiCol_MenuBarBg] = ImVec4(0.86f, 0.86f, 0.86f, 1.00f);
colors[ImGuiCol_ScrollbarBg] = ImVec4(0.98f, 0.98f, 0.98f, 0.53f);
colors[ImGuiCol_ScrollbarGrab] = ImVec4(0.69f, 0.69f, 0.69f, 0.80f);
colors[ImGuiCol_ScrollbarGrabHovered] = ImVec4(0.49f, 0.49f, 0.49f, 0.80f);
colors[ImGuiCol_ScrollbarGrabActive] = ImVec4(0.49f, 0.49f, 0.49f, 1.00f);
colors[ImGuiCol_CheckMark] = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_SliderGrab] = ImVec4(0.26f, 0.59f, 0.98f, 0.78f);
colors[ImGuiCol_SliderGrabActive] = ImVec4(0.46f, 0.54f, 0.80f, 0.60f);
colors[ImGuiCol_Button] = ImVec4(0.26f, 0.59f, 0.98f, 0.40f);
colors[ImGuiCol_ButtonHovered] = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_ButtonActive] = ImVec4(0.06f, 0.53f, 0.98f, 1.00f);
colors[ImGuiCol_Header] = ImVec4(0.26f, 0.59f, 0.98f, 0.31f);
colors[ImGuiCol_HeaderHovered] = ImVec4(0.26f, 0.59f, 0.98f, 0.80f);
colors[ImGuiCol_HeaderActive] = ImVec4(0.26f, 0.59f, 0.98f, 1.00f);
colors[ImGuiCol_Separator] = ImVec4(0.39f, 0.39f, 0.39f, 0.62f);
colors[ImGuiCol_SeparatorHovered] = ImVec4(0.14f, 0.44f, 0.80f, 0.78f);
colors[ImGuiCol_SeparatorActive] = ImVec4(0.14f, 0.44f, 0.80f, 1.00f);
colors[ImGuiCol_ResizeGrip] = ImVec4(0.35f, 0.35f, 0.35f, 0.17f);
colors[ImGuiCol_ResizeGripHovered] = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
colors[ImGuiCol_ResizeGripActive] = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
colors[ImGuiCol_Tab] = ImLerp(colors[ImGuiCol_Header], colors[ImGuiCol_TitleBgActive], 0.90f);
colors[ImGuiCol_TabHovered] = colors[ImGuiCol_HeaderHovered];
colors[ImGuiCol_TabActive] = ImLerp(colors[ImGuiCol_HeaderActive], colors[ImGuiCol_TitleBgActive], 0.60f);
colors[ImGuiCol_TabUnfocused] = ImLerp(colors[ImGuiCol_Tab], colors[ImGuiCol_TitleBg], 0.80f);
colors[ImGuiCol_TabUnfocusedActive] = ImLerp(colors[ImGuiCol_TabActive], colors[ImGuiCol_TitleBg], 0.40f);
colors[ImGuiCol_PlotLines] = ImVec4(0.39f, 0.39f, 0.39f, 1.00f);
colors[ImGuiCol_PlotLinesHovered] = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
colors[ImGuiCol_PlotHistogramHovered] = ImVec4(1.00f, 0.45f, 0.00f, 1.00f);
colors[ImGuiCol_TableHeaderBg] = ImVec4(0.78f, 0.87f, 0.98f, 1.00f);
colors[ImGuiCol_TableBorderStrong] = ImVec4(0.57f, 0.57f, 0.64f, 1.00f); // Prefer using Alpha=1.0 here
colors[ImGuiCol_TableBorderLight] = ImVec4(0.68f, 0.68f, 0.74f, 1.00f); // Prefer using Alpha=1.0 here
colors[ImGuiCol_TableRowBg] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
colors[ImGuiCol_TableRowBgAlt] = ImVec4(0.30f, 0.30f, 0.30f, 0.09f);
colors[ImGuiCol_TextSelectedBg] = ImVec4(0.26f, 0.59f, 0.98f, 0.35f);
colors[ImGuiCol_DragDropTarget] = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
colors[ImGuiCol_NavHighlight] = colors[ImGuiCol_HeaderHovered];
colors[ImGuiCol_NavWindowingHighlight] = ImVec4(0.70f, 0.70f, 0.70f, 0.70f);
colors[ImGuiCol_NavWindowingDimBg] = ImVec4(0.20f, 0.20f, 0.20f, 0.20f);
colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.20f, 0.20f, 0.20f, 0.35f);
}
//-----------------------------------------------------------------------------
// [SECTION] ImDrawList
//-----------------------------------------------------------------------------
ImDrawListSharedData::ImDrawListSharedData()
{
memset(this, 0, sizeof(*this));
for (int i = 0; i < IM_ARRAYSIZE(ArcFastVtx); i++)
{
const float a = ((float)i * 2 * IM_PI) / (float)IM_ARRAYSIZE(ArcFastVtx);
ArcFastVtx[i] = ImVec2(ImCos(a), ImSin(a));
}
ArcFastRadiusCutoff = IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC_R(IM_DRAWLIST_ARCFAST_SAMPLE_MAX, CircleSegmentMaxError);
}
void ImDrawListSharedData::SetCircleTessellationMaxError(float max_error)
{
if (CircleSegmentMaxError == max_error)
return;
IM_ASSERT(max_error > 0.0f);
CircleSegmentMaxError = max_error;
for (int i = 0; i < IM_ARRAYSIZE(CircleSegmentCounts); i++)
{
const float radius = (float)i;
CircleSegmentCounts[i] = (ImU8)((i > 0) ? IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC(radius, CircleSegmentMaxError) : IM_DRAWLIST_ARCFAST_SAMPLE_MAX);
}
ArcFastRadiusCutoff = IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC_R(IM_DRAWLIST_ARCFAST_SAMPLE_MAX, CircleSegmentMaxError);
}
// Initialize before use in a new frame. We always have a command ready in the buffer.
void ImDrawList::_ResetForNewFrame()
{
// Verify that the ImDrawCmd fields we want to memcmp() are contiguous in memory.
IM_STATIC_ASSERT(IM_OFFSETOF(ImDrawCmd, ClipRect) == 0);
IM_STATIC_ASSERT(IM_OFFSETOF(ImDrawCmd, TextureId) == sizeof(ImVec4));
IM_STATIC_ASSERT(IM_OFFSETOF(ImDrawCmd, VtxOffset) == sizeof(ImVec4) + sizeof(ImTextureID));
if (_Splitter._Count > 1)
_Splitter.Merge(this);
CmdBuffer.resize(0);
IdxBuffer.resize(0);
VtxBuffer.resize(0);
Flags = _Data->InitialFlags;
memset(&_CmdHeader, 0, sizeof(_CmdHeader));
_VtxCurrentIdx = 0;
_VtxWritePtr = NULL;
_IdxWritePtr = NULL;
_ClipRectStack.resize(0);
_TextureIdStack.resize(0);
_Path.resize(0);
_Splitter.Clear();
CmdBuffer.push_back(ImDrawCmd());
_FringeScale = 1.0f;
}
void ImDrawList::_ClearFreeMemory()
{
CmdBuffer.clear();
IdxBuffer.clear();
VtxBuffer.clear();
Flags = ImDrawListFlags_None;
_VtxCurrentIdx = 0;
_VtxWritePtr = NULL;
_IdxWritePtr = NULL;
_ClipRectStack.clear();
_TextureIdStack.clear();
_Path.clear();
_Splitter.ClearFreeMemory();
}
ImDrawList* ImDrawList::CloneOutput() const
{
ImDrawList* dst = IM_NEW(ImDrawList(_Data));
dst->CmdBuffer = CmdBuffer;
dst->IdxBuffer = IdxBuffer;
dst->VtxBuffer = VtxBuffer;
dst->Flags = Flags;
return dst;
}
void ImDrawList::AddDrawCmd()
{
ImDrawCmd draw_cmd;
draw_cmd.ClipRect = _CmdHeader.ClipRect; // Same as calling ImDrawCmd_HeaderCopy()
draw_cmd.TextureId = _CmdHeader.TextureId;
draw_cmd.VtxOffset = _CmdHeader.VtxOffset;
draw_cmd.IdxOffset = IdxBuffer.Size;
IM_ASSERT(draw_cmd.ClipRect.x <= draw_cmd.ClipRect.z && draw_cmd.ClipRect.y <= draw_cmd.ClipRect.w);
CmdBuffer.push_back(draw_cmd);
}
// Pop trailing draw command (used before merging or presenting to user)
// Note that this leaves the ImDrawList in a state unfit for further commands, as most code assume that CmdBuffer.Size > 0 && CmdBuffer.back().UserCallback == NULL
void ImDrawList::_PopUnusedDrawCmd()
{
while (CmdBuffer.Size > 0)
{
ImDrawCmd* curr_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
if (curr_cmd->ElemCount != 0 || curr_cmd->UserCallback != NULL)
return;// break;
CmdBuffer.pop_back();
}
}
void ImDrawList::AddCallback(ImDrawCallback callback, void* callback_data)
{
IM_ASSERT_PARANOID(CmdBuffer.Size > 0);
ImDrawCmd* curr_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
IM_ASSERT(curr_cmd->UserCallback == NULL);
if (curr_cmd->ElemCount != 0)
{
AddDrawCmd();
curr_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
}
curr_cmd->UserCallback = callback;
curr_cmd->UserCallbackData = callback_data;
AddDrawCmd(); // Force a new command after us (see comment below)
}
// Compare ClipRect, TextureId and VtxOffset with a single memcmp()
#define ImDrawCmd_HeaderSize (IM_OFFSETOF(ImDrawCmd, VtxOffset) + sizeof(unsigned int))
#define ImDrawCmd_HeaderCompare(CMD_LHS, CMD_RHS) (memcmp(CMD_LHS, CMD_RHS, ImDrawCmd_HeaderSize)) // Compare ClipRect, TextureId, VtxOffset
#define ImDrawCmd_HeaderCopy(CMD_DST, CMD_SRC) (memcpy(CMD_DST, CMD_SRC, ImDrawCmd_HeaderSize)) // Copy ClipRect, TextureId, VtxOffset
#define ImDrawCmd_AreSequentialIdxOffset(CMD_0, CMD_1) (CMD_0->IdxOffset + CMD_0->ElemCount == CMD_1->IdxOffset)
// Try to merge two last draw commands
void ImDrawList::_TryMergeDrawCmds()
{
IM_ASSERT_PARANOID(CmdBuffer.Size > 0);
ImDrawCmd* curr_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
ImDrawCmd* prev_cmd = curr_cmd - 1;
if (ImDrawCmd_HeaderCompare(curr_cmd, prev_cmd) == 0 && ImDrawCmd_AreSequentialIdxOffset(prev_cmd, curr_cmd) && curr_cmd->UserCallback == NULL && prev_cmd->UserCallback == NULL)
{
prev_cmd->ElemCount += curr_cmd->ElemCount;
CmdBuffer.pop_back();
}
}
// Our scheme may appears a bit unusual, basically we want the most-common calls AddLine AddRect etc. to not have to perform any check so we always have a command ready in the stack.
// The cost of figuring out if a new command has to be added or if we can merge is paid in those Update** functions only.
void ImDrawList::_OnChangedClipRect()
{
// If current command is used with different settings we need to add a new command
IM_ASSERT_PARANOID(CmdBuffer.Size > 0);
ImDrawCmd* curr_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
if (curr_cmd->ElemCount != 0 && memcmp(&curr_cmd->ClipRect, &_CmdHeader.ClipRect, sizeof(ImVec4)) != 0)
{
AddDrawCmd();
return;
}
IM_ASSERT(curr_cmd->UserCallback == NULL);
// Try to merge with previous command if it matches, else use current command
ImDrawCmd* prev_cmd = curr_cmd - 1;
if (curr_cmd->ElemCount == 0 && CmdBuffer.Size > 1 && ImDrawCmd_HeaderCompare(&_CmdHeader, prev_cmd) == 0 && ImDrawCmd_AreSequentialIdxOffset(prev_cmd, curr_cmd) && prev_cmd->UserCallback == NULL)
{
CmdBuffer.pop_back();
return;
}
curr_cmd->ClipRect = _CmdHeader.ClipRect;
}
void ImDrawList::_OnChangedTextureID()
{
// If current command is used with different settings we need to add a new command
IM_ASSERT_PARANOID(CmdBuffer.Size > 0);
ImDrawCmd* curr_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
if (curr_cmd->ElemCount != 0 && curr_cmd->TextureId != _CmdHeader.TextureId)
{
AddDrawCmd();
return;
}
IM_ASSERT(curr_cmd->UserCallback == NULL);
// Try to merge with previous command if it matches, else use current command
ImDrawCmd* prev_cmd = curr_cmd - 1;
if (curr_cmd->ElemCount == 0 && CmdBuffer.Size > 1 && ImDrawCmd_HeaderCompare(&_CmdHeader, prev_cmd) == 0 && ImDrawCmd_AreSequentialIdxOffset(prev_cmd, curr_cmd) && prev_cmd->UserCallback == NULL)
{
CmdBuffer.pop_back();
return;
}
curr_cmd->TextureId = _CmdHeader.TextureId;
}
void ImDrawList::_OnChangedVtxOffset()
{
// We don't need to compare curr_cmd->VtxOffset != _CmdHeader.VtxOffset because we know it'll be different at the time we call this.
_VtxCurrentIdx = 0;
IM_ASSERT_PARANOID(CmdBuffer.Size > 0);
ImDrawCmd* curr_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
//IM_ASSERT(curr_cmd->VtxOffset != _CmdHeader.VtxOffset); // See #3349
if (curr_cmd->ElemCount != 0)
{
AddDrawCmd();
return;
}
IM_ASSERT(curr_cmd->UserCallback == NULL);
curr_cmd->VtxOffset = _CmdHeader.VtxOffset;
}
int ImDrawList::_CalcCircleAutoSegmentCount(float radius) const
{
// Automatic segment count
const int radius_idx = (int)(radius + 0.999999f); // ceil to never reduce accuracy
if (radius_idx >= 0 && radius_idx < IM_ARRAYSIZE(_Data->CircleSegmentCounts))
return _Data->CircleSegmentCounts[radius_idx]; // Use cached value
else
return IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC(radius, _Data->CircleSegmentMaxError);
}
// Render-level scissoring. This is passed down to your render function but not used for CPU-side coarse clipping. Prefer using higher-level ImGui::PushClipRect() to affect logic (hit-testing and widget culling)
void ImDrawList::PushClipRect(const ImVec2& cr_min, const ImVec2& cr_max, bool intersect_with_current_clip_rect)
{
ImVec4 cr(cr_min.x, cr_min.y, cr_max.x, cr_max.y);
if (intersect_with_current_clip_rect)
{
ImVec4 current = _CmdHeader.ClipRect;
if (cr.x < current.x) cr.x = current.x;
if (cr.y < current.y) cr.y = current.y;
if (cr.z > current.z) cr.z = current.z;
if (cr.w > current.w) cr.w = current.w;
}
cr.z = ImMax(cr.x, cr.z);
cr.w = ImMax(cr.y, cr.w);
_ClipRectStack.push_back(cr);
_CmdHeader.ClipRect = cr;
_OnChangedClipRect();
}
void ImDrawList::PushClipRectFullScreen()
{
PushClipRect(ImVec2(_Data->ClipRectFullscreen.x, _Data->ClipRectFullscreen.y), ImVec2(_Data->ClipRectFullscreen.z, _Data->ClipRectFullscreen.w));
}
void ImDrawList::PopClipRect()
{
_ClipRectStack.pop_back();
_CmdHeader.ClipRect = (_ClipRectStack.Size == 0) ? _Data->ClipRectFullscreen : _ClipRectStack.Data[_ClipRectStack.Size - 1];
_OnChangedClipRect();
}
void ImDrawList::PushTextureID(ImTextureID texture_id)
{
_TextureIdStack.push_back(texture_id);
_CmdHeader.TextureId = texture_id;
_OnChangedTextureID();
}
void ImDrawList::PopTextureID()
{
_TextureIdStack.pop_back();
_CmdHeader.TextureId = (_TextureIdStack.Size == 0) ? (ImTextureID)NULL : _TextureIdStack.Data[_TextureIdStack.Size - 1];
_OnChangedTextureID();
}
// Reserve space for a number of vertices and indices.
// You must finish filling your reserved data before calling PrimReserve() again, as it may reallocate or
// submit the intermediate results. PrimUnreserve() can be used to release unused allocations.
void ImDrawList::PrimReserve(int idx_count, int vtx_count)
{
// Large mesh support (when enabled)
IM_ASSERT_PARANOID(idx_count >= 0 && vtx_count >= 0);
if (sizeof(ImDrawIdx) == 2 && (_VtxCurrentIdx + vtx_count >= (1 << 16)) && (Flags & ImDrawListFlags_AllowVtxOffset))
{
// FIXME: In theory we should be testing that vtx_count <64k here.
// In practice, RenderText() relies on reserving ahead for a worst case scenario so it is currently useful for us
// to not make that check until we rework the text functions to handle clipping and large horizontal lines better.
_CmdHeader.VtxOffset = VtxBuffer.Size;
_OnChangedVtxOffset();
}
ImDrawCmd* draw_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
draw_cmd->ElemCount += idx_count;
int vtx_buffer_old_size = VtxBuffer.Size;
VtxBuffer.resize(vtx_buffer_old_size + vtx_count);
_VtxWritePtr = VtxBuffer.Data + vtx_buffer_old_size;
int idx_buffer_old_size = IdxBuffer.Size;
IdxBuffer.resize(idx_buffer_old_size + idx_count);
_IdxWritePtr = IdxBuffer.Data + idx_buffer_old_size;
}
// Release the a number of reserved vertices/indices from the end of the last reservation made with PrimReserve().
void ImDrawList::PrimUnreserve(int idx_count, int vtx_count)
{
IM_ASSERT_PARANOID(idx_count >= 0 && vtx_count >= 0);
ImDrawCmd* draw_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
draw_cmd->ElemCount -= idx_count;
VtxBuffer.shrink(VtxBuffer.Size - vtx_count);
IdxBuffer.shrink(IdxBuffer.Size - idx_count);
}
// Fully unrolled with inline call to keep our debug builds decently fast.
void ImDrawList::PrimRect(const ImVec2& a, const ImVec2& c, ImU32 col)
{
ImVec2 b(c.x, a.y), d(a.x, c.y), uv(_Data->TexUvWhitePixel);
ImDrawIdx idx = (ImDrawIdx)_VtxCurrentIdx;
_IdxWritePtr[0] = idx; _IdxWritePtr[1] = (ImDrawIdx)(idx+1); _IdxWritePtr[2] = (ImDrawIdx)(idx+2);
_IdxWritePtr[3] = idx; _IdxWritePtr[4] = (ImDrawIdx)(idx+2); _IdxWritePtr[5] = (ImDrawIdx)(idx+3);
_VtxWritePtr[0].pos = a; _VtxWritePtr[0].uv = uv; _VtxWritePtr[0].col = col;
_VtxWritePtr[1].pos = b; _VtxWritePtr[1].uv = uv; _VtxWritePtr[1].col = col;
_VtxWritePtr[2].pos = c; _VtxWritePtr[2].uv = uv; _VtxWritePtr[2].col = col;
_VtxWritePtr[3].pos = d; _VtxWritePtr[3].uv = uv; _VtxWritePtr[3].col = col;
_VtxWritePtr += 4;
_VtxCurrentIdx += 4;
_IdxWritePtr += 6;
}
void ImDrawList::PrimRectUV(const ImVec2& a, const ImVec2& c, const ImVec2& uv_a, const ImVec2& uv_c, ImU32 col)
{
ImVec2 b(c.x, a.y), d(a.x, c.y), uv_b(uv_c.x, uv_a.y), uv_d(uv_a.x, uv_c.y);
ImDrawIdx idx = (ImDrawIdx)_VtxCurrentIdx;
_IdxWritePtr[0] = idx; _IdxWritePtr[1] = (ImDrawIdx)(idx+1); _IdxWritePtr[2] = (ImDrawIdx)(idx+2);
_IdxWritePtr[3] = idx; _IdxWritePtr[4] = (ImDrawIdx)(idx+2); _IdxWritePtr[5] = (ImDrawIdx)(idx+3);
_VtxWritePtr[0].pos = a; _VtxWritePtr[0].uv = uv_a; _VtxWritePtr[0].col = col;
_VtxWritePtr[1].pos = b; _VtxWritePtr[1].uv = uv_b; _VtxWritePtr[1].col = col;
_VtxWritePtr[2].pos = c; _VtxWritePtr[2].uv = uv_c; _VtxWritePtr[2].col = col;
_VtxWritePtr[3].pos = d; _VtxWritePtr[3].uv = uv_d; _VtxWritePtr[3].col = col;
_VtxWritePtr += 4;
_VtxCurrentIdx += 4;
_IdxWritePtr += 6;
}
void ImDrawList::PrimQuadUV(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& d, const ImVec2& uv_a, const ImVec2& uv_b, const ImVec2& uv_c, const ImVec2& uv_d, ImU32 col)
{
ImDrawIdx idx = (ImDrawIdx)_VtxCurrentIdx;
_IdxWritePtr[0] = idx; _IdxWritePtr[1] = (ImDrawIdx)(idx+1); _IdxWritePtr[2] = (ImDrawIdx)(idx+2);
_IdxWritePtr[3] = idx; _IdxWritePtr[4] = (ImDrawIdx)(idx+2); _IdxWritePtr[5] = (ImDrawIdx)(idx+3);
_VtxWritePtr[0].pos = a; _VtxWritePtr[0].uv = uv_a; _VtxWritePtr[0].col = col;
_VtxWritePtr[1].pos = b; _VtxWritePtr[1].uv = uv_b; _VtxWritePtr[1].col = col;
_VtxWritePtr[2].pos = c; _VtxWritePtr[2].uv = uv_c; _VtxWritePtr[2].col = col;
_VtxWritePtr[3].pos = d; _VtxWritePtr[3].uv = uv_d; _VtxWritePtr[3].col = col;
_VtxWritePtr += 4;
_VtxCurrentIdx += 4;
_IdxWritePtr += 6;
}
// On AddPolyline() and AddConvexPolyFilled() we intentionally avoid using ImVec2 and superfluous function calls to optimize debug/non-inlined builds.
// - Those macros expects l-values and need to be used as their own statement.
// - Those macros are intentionally not surrounded by the 'do {} while (0)' idiom because even that translates to runtime with debug compilers.
#define IM_NORMALIZE2F_OVER_ZERO(VX,VY) { float d2 = VX*VX + VY*VY; if (d2 > 0.0f) { float inv_len = ImRsqrt(d2); VX *= inv_len; VY *= inv_len; } } (void)0
#define IM_FIXNORMAL2F_MAX_INVLEN2 100.0f // 500.0f (see #4053, #3366)
#define IM_FIXNORMAL2F(VX,VY) { float d2 = VX*VX + VY*VY; if (d2 > 0.000001f) { float inv_len2 = 1.0f / d2; if (inv_len2 > IM_FIXNORMAL2F_MAX_INVLEN2) inv_len2 = IM_FIXNORMAL2F_MAX_INVLEN2; VX *= inv_len2; VY *= inv_len2; } } (void)0
// TODO: Thickness anti-aliased lines cap are missing their AA fringe.
// We avoid using the ImVec2 math operators here to reduce cost to a minimum for debug/non-inlined builds.
void ImDrawList::AddPolyline(const ImVec2* points, const int points_count, ImU32 col, ImDrawFlags flags, float thickness)
{
if (points_count < 2 || (col & IM_COL32_A_MASK) == 0)
return;
const bool closed = (flags & ImDrawFlags_Closed) != 0;
const ImVec2 opaque_uv = _Data->TexUvWhitePixel;
const int count = closed ? points_count : points_count - 1; // The number of line segments we need to draw
const bool thick_line = (thickness > _FringeScale);
if (Flags & ImDrawListFlags_AntiAliasedLines)
{
// Anti-aliased stroke
const float AA_SIZE = _FringeScale;
const ImU32 col_trans = col & ~IM_COL32_A_MASK;
// Thicknesses <1.0 should behave like thickness 1.0
thickness = ImMax(thickness, 1.0f);
const int integer_thickness = (int)thickness;
const float fractional_thickness = thickness - integer_thickness;
// Do we want to draw this line using a texture?
// - For now, only draw integer-width lines using textures to avoid issues with the way scaling occurs, could be improved.
// - If AA_SIZE is not 1.0f we cannot use the texture path.
const bool use_texture = (Flags & ImDrawListFlags_AntiAliasedLinesUseTex) && (integer_thickness < IM_DRAWLIST_TEX_LINES_WIDTH_MAX) && (fractional_thickness <= 0.00001f) && (AA_SIZE == 1.0f);
// We should never hit this, because NewFrame() doesn't set ImDrawListFlags_AntiAliasedLinesUseTex unless ImFontAtlasFlags_NoBakedLines is off
IM_ASSERT_PARANOID(!use_texture || !(_Data->Font->ContainerAtlas->Flags & ImFontAtlasFlags_NoBakedLines));
const int idx_count = use_texture ? (count * 6) : (thick_line ? count * 18 : count * 12);
const int vtx_count = use_texture ? (points_count * 2) : (thick_line ? points_count * 4 : points_count * 3);
PrimReserve(idx_count, vtx_count);
// Temporary buffer
// The first <points_count> items are normals at each line point, then after that there are either 2 or 4 temp points for each line point
_Data->TempBuffer.reserve_discard(points_count * ((use_texture || !thick_line) ? 3 : 5));
ImVec2* temp_normals = _Data->TempBuffer.Data;
ImVec2* temp_points = temp_normals + points_count;
// Calculate normals (tangents) for each line segment
for (int i1 = 0; i1 < count; i1++)
{
const int i2 = (i1 + 1) == points_count ? 0 : i1 + 1;
float dx = points[i2].x - points[i1].x;
float dy = points[i2].y - points[i1].y;
IM_NORMALIZE2F_OVER_ZERO(dx, dy);
temp_normals[i1].x = dy;
temp_normals[i1].y = -dx;
}
if (!closed)
temp_normals[points_count - 1] = temp_normals[points_count - 2];
// If we are drawing a one-pixel-wide line without a texture, or a textured line of any width, we only need 2 or 3 vertices per point
if (use_texture || !thick_line)
{
// [PATH 1] Texture-based lines (thick or non-thick)
// [PATH 2] Non texture-based lines (non-thick)
// The width of the geometry we need to draw - this is essentially <thickness> pixels for the line itself, plus "one pixel" for AA.
// - In the texture-based path, we don't use AA_SIZE here because the +1 is tied to the generated texture
// (see ImFontAtlasBuildRenderLinesTexData() function), and so alternate values won't work without changes to that code.
// - In the non texture-based paths, we would allow AA_SIZE to potentially be != 1.0f with a patch (e.g. fringe_scale patch to
// allow scaling geometry while preserving one-screen-pixel AA fringe).
const float half_draw_size = use_texture ? ((thickness * 0.5f) + 1) : AA_SIZE;
// If line is not closed, the first and last points need to be generated differently as there are no normals to blend
if (!closed)
{
temp_points[0] = points[0] + temp_normals[0] * half_draw_size;
temp_points[1] = points[0] - temp_normals[0] * half_draw_size;
temp_points[(points_count-1)*2+0] = points[points_count-1] + temp_normals[points_count-1] * half_draw_size;
temp_points[(points_count-1)*2+1] = points[points_count-1] - temp_normals[points_count-1] * half_draw_size;
}
// Generate the indices to form a number of triangles for each line segment, and the vertices for the line edges
// This takes points n and n+1 and writes into n+1, with the first point in a closed line being generated from the final one (as n+1 wraps)
// FIXME-OPT: Merge the different loops, possibly remove the temporary buffer.
unsigned int idx1 = _VtxCurrentIdx; // Vertex index for start of line segment
for (int i1 = 0; i1 < count; i1++) // i1 is the first point of the line segment
{
const int i2 = (i1 + 1) == points_count ? 0 : i1 + 1; // i2 is the second point of the line segment
const unsigned int idx2 = ((i1 + 1) == points_count) ? _VtxCurrentIdx : (idx1 + (use_texture ? 2 : 3)); // Vertex index for end of segment
// Average normals
float dm_x = (temp_normals[i1].x + temp_normals[i2].x) * 0.5f;
float dm_y = (temp_normals[i1].y + temp_normals[i2].y) * 0.5f;
IM_FIXNORMAL2F(dm_x, dm_y);
dm_x *= half_draw_size; // dm_x, dm_y are offset to the outer edge of the AA area
dm_y *= half_draw_size;
// Add temporary vertexes for the outer edges
ImVec2* out_vtx = &temp_points[i2 * 2];
out_vtx[0].x = points[i2].x + dm_x;
out_vtx[0].y = points[i2].y + dm_y;
out_vtx[1].x = points[i2].x - dm_x;
out_vtx[1].y = points[i2].y - dm_y;
if (use_texture)
{
// Add indices for two triangles
_IdxWritePtr[0] = (ImDrawIdx)(idx2 + 0); _IdxWritePtr[1] = (ImDrawIdx)(idx1 + 0); _IdxWritePtr[2] = (ImDrawIdx)(idx1 + 1); // Right tri
_IdxWritePtr[3] = (ImDrawIdx)(idx2 + 1); _IdxWritePtr[4] = (ImDrawIdx)(idx1 + 1); _IdxWritePtr[5] = (ImDrawIdx)(idx2 + 0); // Left tri
_IdxWritePtr += 6;
}
else
{
// Add indexes for four triangles
_IdxWritePtr[0] = (ImDrawIdx)(idx2 + 0); _IdxWritePtr[1] = (ImDrawIdx)(idx1 + 0); _IdxWritePtr[2] = (ImDrawIdx)(idx1 + 2); // Right tri 1
_IdxWritePtr[3] = (ImDrawIdx)(idx1 + 2); _IdxWritePtr[4] = (ImDrawIdx)(idx2 + 2); _IdxWritePtr[5] = (ImDrawIdx)(idx2 + 0); // Right tri 2
_IdxWritePtr[6] = (ImDrawIdx)(idx2 + 1); _IdxWritePtr[7] = (ImDrawIdx)(idx1 + 1); _IdxWritePtr[8] = (ImDrawIdx)(idx1 + 0); // Left tri 1
_IdxWritePtr[9] = (ImDrawIdx)(idx1 + 0); _IdxWritePtr[10] = (ImDrawIdx)(idx2 + 0); _IdxWritePtr[11] = (ImDrawIdx)(idx2 + 1); // Left tri 2
_IdxWritePtr += 12;
}
idx1 = idx2;
}
// Add vertexes for each point on the line
if (use_texture)
{
// If we're using textures we only need to emit the left/right edge vertices
ImVec4 tex_uvs = _Data->TexUvLines[integer_thickness];
/*if (fractional_thickness != 0.0f) // Currently always zero when use_texture==false!
{
const ImVec4 tex_uvs_1 = _Data->TexUvLines[integer_thickness + 1];
tex_uvs.x = tex_uvs.x + (tex_uvs_1.x - tex_uvs.x) * fractional_thickness; // inlined ImLerp()
tex_uvs.y = tex_uvs.y + (tex_uvs_1.y - tex_uvs.y) * fractional_thickness;
tex_uvs.z = tex_uvs.z + (tex_uvs_1.z - tex_uvs.z) * fractional_thickness;
tex_uvs.w = tex_uvs.w + (tex_uvs_1.w - tex_uvs.w) * fractional_thickness;
}*/
ImVec2 tex_uv0(tex_uvs.x, tex_uvs.y);
ImVec2 tex_uv1(tex_uvs.z, tex_uvs.w);
for (int i = 0; i < points_count; i++)
{
_VtxWritePtr[0].pos = temp_points[i * 2 + 0]; _VtxWritePtr[0].uv = tex_uv0; _VtxWritePtr[0].col = col; // Left-side outer edge
_VtxWritePtr[1].pos = temp_points[i * 2 + 1]; _VtxWritePtr[1].uv = tex_uv1; _VtxWritePtr[1].col = col; // Right-side outer edge
_VtxWritePtr += 2;
}
}
else
{
// If we're not using a texture, we need the center vertex as well
for (int i = 0; i < points_count; i++)
{
_VtxWritePtr[0].pos = points[i]; _VtxWritePtr[0].uv = opaque_uv; _VtxWritePtr[0].col = col; // Center of line
_VtxWritePtr[1].pos = temp_points[i * 2 + 0]; _VtxWritePtr[1].uv = opaque_uv; _VtxWritePtr[1].col = col_trans; // Left-side outer edge
_VtxWritePtr[2].pos = temp_points[i * 2 + 1]; _VtxWritePtr[2].uv = opaque_uv; _VtxWritePtr[2].col = col_trans; // Right-side outer edge
_VtxWritePtr += 3;
}
}
}
else
{
// [PATH 2] Non texture-based lines (thick): we need to draw the solid line core and thus require four vertices per point
const float half_inner_thickness = (thickness - AA_SIZE) * 0.5f;
// If line is not closed, the first and last points need to be generated differently as there are no normals to blend
if (!closed)
{
const int points_last = points_count - 1;
temp_points[0] = points[0] + temp_normals[0] * (half_inner_thickness + AA_SIZE);
temp_points[1] = points[0] + temp_normals[0] * (half_inner_thickness);
temp_points[2] = points[0] - temp_normals[0] * (half_inner_thickness);
temp_points[3] = points[0] - temp_normals[0] * (half_inner_thickness + AA_SIZE);
temp_points[points_last * 4 + 0] = points[points_last] + temp_normals[points_last] * (half_inner_thickness + AA_SIZE);
temp_points[points_last * 4 + 1] = points[points_last] + temp_normals[points_last] * (half_inner_thickness);
temp_points[points_last * 4 + 2] = points[points_last] - temp_normals[points_last] * (half_inner_thickness);
temp_points[points_last * 4 + 3] = points[points_last] - temp_normals[points_last] * (half_inner_thickness + AA_SIZE);
}
// Generate the indices to form a number of triangles for each line segment, and the vertices for the line edges
// This takes points n and n+1 and writes into n+1, with the first point in a closed line being generated from the final one (as n+1 wraps)
// FIXME-OPT: Merge the different loops, possibly remove the temporary buffer.
unsigned int idx1 = _VtxCurrentIdx; // Vertex index for start of line segment
for (int i1 = 0; i1 < count; i1++) // i1 is the first point of the line segment
{
const int i2 = (i1 + 1) == points_count ? 0 : (i1 + 1); // i2 is the second point of the line segment
const unsigned int idx2 = (i1 + 1) == points_count ? _VtxCurrentIdx : (idx1 + 4); // Vertex index for end of segment
// Average normals
float dm_x = (temp_normals[i1].x + temp_normals[i2].x) * 0.5f;
float dm_y = (temp_normals[i1].y + temp_normals[i2].y) * 0.5f;
IM_FIXNORMAL2F(dm_x, dm_y);
float dm_out_x = dm_x * (half_inner_thickness + AA_SIZE);
float dm_out_y = dm_y * (half_inner_thickness + AA_SIZE);
float dm_in_x = dm_x * half_inner_thickness;
float dm_in_y = dm_y * half_inner_thickness;
// Add temporary vertices
ImVec2* out_vtx = &temp_points[i2 * 4];
out_vtx[0].x = points[i2].x + dm_out_x;
out_vtx[0].y = points[i2].y + dm_out_y;
out_vtx[1].x = points[i2].x + dm_in_x;
out_vtx[1].y = points[i2].y + dm_in_y;
out_vtx[2].x = points[i2].x - dm_in_x;
out_vtx[2].y = points[i2].y - dm_in_y;
out_vtx[3].x = points[i2].x - dm_out_x;
out_vtx[3].y = points[i2].y - dm_out_y;
// Add indexes
_IdxWritePtr[0] = (ImDrawIdx)(idx2 + 1); _IdxWritePtr[1] = (ImDrawIdx)(idx1 + 1); _IdxWritePtr[2] = (ImDrawIdx)(idx1 + 2);
_IdxWritePtr[3] = (ImDrawIdx)(idx1 + 2); _IdxWritePtr[4] = (ImDrawIdx)(idx2 + 2); _IdxWritePtr[5] = (ImDrawIdx)(idx2 + 1);
_IdxWritePtr[6] = (ImDrawIdx)(idx2 + 1); _IdxWritePtr[7] = (ImDrawIdx)(idx1 + 1); _IdxWritePtr[8] = (ImDrawIdx)(idx1 + 0);
_IdxWritePtr[9] = (ImDrawIdx)(idx1 + 0); _IdxWritePtr[10] = (ImDrawIdx)(idx2 + 0); _IdxWritePtr[11] = (ImDrawIdx)(idx2 + 1);
_IdxWritePtr[12] = (ImDrawIdx)(idx2 + 2); _IdxWritePtr[13] = (ImDrawIdx)(idx1 + 2); _IdxWritePtr[14] = (ImDrawIdx)(idx1 + 3);
_IdxWritePtr[15] = (ImDrawIdx)(idx1 + 3); _IdxWritePtr[16] = (ImDrawIdx)(idx2 + 3); _IdxWritePtr[17] = (ImDrawIdx)(idx2 + 2);
_IdxWritePtr += 18;
idx1 = idx2;
}
// Add vertices
for (int i = 0; i < points_count; i++)
{
_VtxWritePtr[0].pos = temp_points[i * 4 + 0]; _VtxWritePtr[0].uv = opaque_uv; _VtxWritePtr[0].col = col_trans;
_VtxWritePtr[1].pos = temp_points[i * 4 + 1]; _VtxWritePtr[1].uv = opaque_uv; _VtxWritePtr[1].col = col;
_VtxWritePtr[2].pos = temp_points[i * 4 + 2]; _VtxWritePtr[2].uv = opaque_uv; _VtxWritePtr[2].col = col;
_VtxWritePtr[3].pos = temp_points[i * 4 + 3]; _VtxWritePtr[3].uv = opaque_uv; _VtxWritePtr[3].col = col_trans;
_VtxWritePtr += 4;
}
}
_VtxCurrentIdx += (ImDrawIdx)vtx_count;
}
else
{
// [PATH 4] Non texture-based, Non anti-aliased lines
const int idx_count = count * 6;
const int vtx_count = count * 4; // FIXME-OPT: Not sharing edges
PrimReserve(idx_count, vtx_count);
for (int i1 = 0; i1 < count; i1++)
{
const int i2 = (i1 + 1) == points_count ? 0 : i1 + 1;
const ImVec2& p1 = points[i1];
const ImVec2& p2 = points[i2];
float dx = p2.x - p1.x;
float dy = p2.y - p1.y;
IM_NORMALIZE2F_OVER_ZERO(dx, dy);
dx *= (thickness * 0.5f);
dy *= (thickness * 0.5f);
_VtxWritePtr[0].pos.x = p1.x + dy; _VtxWritePtr[0].pos.y = p1.y - dx; _VtxWritePtr[0].uv = opaque_uv; _VtxWritePtr[0].col = col;
_VtxWritePtr[1].pos.x = p2.x + dy; _VtxWritePtr[1].pos.y = p2.y - dx; _VtxWritePtr[1].uv = opaque_uv; _VtxWritePtr[1].col = col;
_VtxWritePtr[2].pos.x = p2.x - dy; _VtxWritePtr[2].pos.y = p2.y + dx; _VtxWritePtr[2].uv = opaque_uv; _VtxWritePtr[2].col = col;
_VtxWritePtr[3].pos.x = p1.x - dy; _VtxWritePtr[3].pos.y = p1.y + dx; _VtxWritePtr[3].uv = opaque_uv; _VtxWritePtr[3].col = col;
_VtxWritePtr += 4;
_IdxWritePtr[0] = (ImDrawIdx)(_VtxCurrentIdx); _IdxWritePtr[1] = (ImDrawIdx)(_VtxCurrentIdx + 1); _IdxWritePtr[2] = (ImDrawIdx)(_VtxCurrentIdx + 2);
_IdxWritePtr[3] = (ImDrawIdx)(_VtxCurrentIdx); _IdxWritePtr[4] = (ImDrawIdx)(_VtxCurrentIdx + 2); _IdxWritePtr[5] = (ImDrawIdx)(_VtxCurrentIdx + 3);
_IdxWritePtr += 6;
_VtxCurrentIdx += 4;
}
}
}
// - We intentionally avoid using ImVec2 and its math operators here to reduce cost to a minimum for debug/non-inlined builds.
// - Filled shapes must always use clockwise winding order. The anti-aliasing fringe depends on it. Counter-clockwise shapes will have "inward" anti-aliasing.
void ImDrawList::AddConvexPolyFilled(const ImVec2* points, const int points_count, ImU32 col)
{
if (points_count < 3 || (col & IM_COL32_A_MASK) == 0)
return;
const ImVec2 uv = _Data->TexUvWhitePixel;
if (Flags & ImDrawListFlags_AntiAliasedFill)
{
// Anti-aliased Fill
const float AA_SIZE = _FringeScale;
const ImU32 col_trans = col & ~IM_COL32_A_MASK;
const int idx_count = (points_count - 2)*3 + points_count * 6;
const int vtx_count = (points_count * 2);
PrimReserve(idx_count, vtx_count);
// Add indexes for fill
unsigned int vtx_inner_idx = _VtxCurrentIdx;
unsigned int vtx_outer_idx = _VtxCurrentIdx + 1;
for (int i = 2; i < points_count; i++)
{
_IdxWritePtr[0] = (ImDrawIdx)(vtx_inner_idx); _IdxWritePtr[1] = (ImDrawIdx)(vtx_inner_idx + ((i - 1) << 1)); _IdxWritePtr[2] = (ImDrawIdx)(vtx_inner_idx + (i << 1));
_IdxWritePtr += 3;
}
// Compute normals
_Data->TempBuffer.reserve_discard(points_count);
ImVec2* temp_normals = _Data->TempBuffer.Data;
for (int i0 = points_count - 1, i1 = 0; i1 < points_count; i0 = i1++)
{
const ImVec2& p0 = points[i0];
const ImVec2& p1 = points[i1];
float dx = p1.x - p0.x;
float dy = p1.y - p0.y;
IM_NORMALIZE2F_OVER_ZERO(dx, dy);
temp_normals[i0].x = dy;
temp_normals[i0].y = -dx;
}
for (int i0 = points_count - 1, i1 = 0; i1 < points_count; i0 = i1++)
{
// Average normals
const ImVec2& n0 = temp_normals[i0];
const ImVec2& n1 = temp_normals[i1];
float dm_x = (n0.x + n1.x) * 0.5f;
float dm_y = (n0.y + n1.y) * 0.5f;
IM_FIXNORMAL2F(dm_x, dm_y);
dm_x *= AA_SIZE * 0.5f;
dm_y *= AA_SIZE * 0.5f;
// Add vertices
_VtxWritePtr[0].pos.x = (points[i1].x - dm_x); _VtxWritePtr[0].pos.y = (points[i1].y - dm_y); _VtxWritePtr[0].uv = uv; _VtxWritePtr[0].col = col; // Inner
_VtxWritePtr[1].pos.x = (points[i1].x + dm_x); _VtxWritePtr[1].pos.y = (points[i1].y + dm_y); _VtxWritePtr[1].uv = uv; _VtxWritePtr[1].col = col_trans; // Outer
_VtxWritePtr += 2;
// Add indexes for fringes
_IdxWritePtr[0] = (ImDrawIdx)(vtx_inner_idx + (i1 << 1)); _IdxWritePtr[1] = (ImDrawIdx)(vtx_inner_idx + (i0 << 1)); _IdxWritePtr[2] = (ImDrawIdx)(vtx_outer_idx + (i0 << 1));
_IdxWritePtr[3] = (ImDrawIdx)(vtx_outer_idx + (i0 << 1)); _IdxWritePtr[4] = (ImDrawIdx)(vtx_outer_idx + (i1 << 1)); _IdxWritePtr[5] = (ImDrawIdx)(vtx_inner_idx + (i1 << 1));
_IdxWritePtr += 6;
}
_VtxCurrentIdx += (ImDrawIdx)vtx_count;
}
else
{
// Non Anti-aliased Fill
const int idx_count = (points_count - 2)*3;
const int vtx_count = points_count;
PrimReserve(idx_count, vtx_count);
for (int i = 0; i < vtx_count; i++)
{
_VtxWritePtr[0].pos = points[i]; _VtxWritePtr[0].uv = uv; _VtxWritePtr[0].col = col;
_VtxWritePtr++;
}
for (int i = 2; i < points_count; i++)
{
_IdxWritePtr[0] = (ImDrawIdx)(_VtxCurrentIdx); _IdxWritePtr[1] = (ImDrawIdx)(_VtxCurrentIdx + i - 1); _IdxWritePtr[2] = (ImDrawIdx)(_VtxCurrentIdx + i);
_IdxWritePtr += 3;
}
_VtxCurrentIdx += (ImDrawIdx)vtx_count;
}
}
void ImDrawList::_PathArcToFastEx(const ImVec2& center, float radius, int a_min_sample, int a_max_sample, int a_step)
{
if (radius < 0.5f)
{
_Path.push_back(center);
return;
}
// Calculate arc auto segment step size
if (a_step <= 0)
a_step = IM_DRAWLIST_ARCFAST_SAMPLE_MAX / _CalcCircleAutoSegmentCount(radius);
// Make sure we never do steps larger than one quarter of the circle
a_step = ImClamp(a_step, 1, IM_DRAWLIST_ARCFAST_TABLE_SIZE / 4);
const int sample_range = ImAbs(a_max_sample - a_min_sample);
const int a_next_step = a_step;
int samples = sample_range + 1;
bool extra_max_sample = false;
if (a_step > 1)
{
samples = sample_range / a_step + 1;
const int overstep = sample_range % a_step;
if (overstep > 0)
{
extra_max_sample = true;
samples++;
// When we have overstep to avoid awkwardly looking one long line and one tiny one at the end,
// distribute first step range evenly between them by reducing first step size.
if (sample_range > 0)
a_step -= (a_step - overstep) / 2;
}
}
_Path.resize(_Path.Size + samples);
ImVec2* out_ptr = _Path.Data + (_Path.Size - samples);
int sample_index = a_min_sample;
if (sample_index < 0 || sample_index >= IM_DRAWLIST_ARCFAST_SAMPLE_MAX)
{
sample_index = sample_index % IM_DRAWLIST_ARCFAST_SAMPLE_MAX;
if (sample_index < 0)
sample_index += IM_DRAWLIST_ARCFAST_SAMPLE_MAX;
}
if (a_max_sample >= a_min_sample)
{
for (int a = a_min_sample; a <= a_max_sample; a += a_step, sample_index += a_step, a_step = a_next_step)
{
// a_step is clamped to IM_DRAWLIST_ARCFAST_SAMPLE_MAX, so we have guaranteed that it will not wrap over range twice or more
if (sample_index >= IM_DRAWLIST_ARCFAST_SAMPLE_MAX)
sample_index -= IM_DRAWLIST_ARCFAST_SAMPLE_MAX;
const ImVec2 s = _Data->ArcFastVtx[sample_index];
out_ptr->x = center.x + s.x * radius;
out_ptr->y = center.y + s.y * radius;
out_ptr++;
}
}
else
{
for (int a = a_min_sample; a >= a_max_sample; a -= a_step, sample_index -= a_step, a_step = a_next_step)
{
// a_step is clamped to IM_DRAWLIST_ARCFAST_SAMPLE_MAX, so we have guaranteed that it will not wrap over range twice or more
if (sample_index < 0)
sample_index += IM_DRAWLIST_ARCFAST_SAMPLE_MAX;
const ImVec2 s = _Data->ArcFastVtx[sample_index];
out_ptr->x = center.x + s.x * radius;
out_ptr->y = center.y + s.y * radius;
out_ptr++;
}
}
if (extra_max_sample)
{
int normalized_max_sample = a_max_sample % IM_DRAWLIST_ARCFAST_SAMPLE_MAX;
if (normalized_max_sample < 0)
normalized_max_sample += IM_DRAWLIST_ARCFAST_SAMPLE_MAX;
const ImVec2 s = _Data->ArcFastVtx[normalized_max_sample];
out_ptr->x = center.x + s.x * radius;
out_ptr->y = center.y + s.y * radius;
out_ptr++;
}
IM_ASSERT_PARANOID(_Path.Data + _Path.Size == out_ptr);
}
void ImDrawList::_PathArcToN(const ImVec2& center, float radius, float a_min, float a_max, int num_segments)
{
if (radius < 0.5f)
{
_Path.push_back(center);
return;
}
// Note that we are adding a point at both a_min and a_max.
// If you are trying to draw a full closed circle you don't want the overlapping points!
_Path.reserve(_Path.Size + (num_segments + 1));
for (int i = 0; i <= num_segments; i++)
{
const float a = a_min + ((float)i / (float)num_segments) * (a_max - a_min);
_Path.push_back(ImVec2(center.x + ImCos(a) * radius, center.y + ImSin(a) * radius));
}
}
// 0: East, 3: South, 6: West, 9: North, 12: East
void ImDrawList::PathArcToFast(const ImVec2& center, float radius, int a_min_of_12, int a_max_of_12)
{
if (radius < 0.5f)
{
_Path.push_back(center);
return;
}
_PathArcToFastEx(center, radius, a_min_of_12 * IM_DRAWLIST_ARCFAST_SAMPLE_MAX / 12, a_max_of_12 * IM_DRAWLIST_ARCFAST_SAMPLE_MAX / 12, 0);
}
void ImDrawList::PathArcTo(const ImVec2& center, float radius, float a_min, float a_max, int num_segments)
{
if (radius < 0.5f)
{
_Path.push_back(center);
return;
}
if (num_segments > 0)
{
_PathArcToN(center, radius, a_min, a_max, num_segments);
return;
}
// Automatic segment count
if (radius <= _Data->ArcFastRadiusCutoff)
{
const bool a_is_reverse = a_max < a_min;
// We are going to use precomputed values for mid samples.
// Determine first and last sample in lookup table that belong to the arc.
const float a_min_sample_f = IM_DRAWLIST_ARCFAST_SAMPLE_MAX * a_min / (IM_PI * 2.0f);
const float a_max_sample_f = IM_DRAWLIST_ARCFAST_SAMPLE_MAX * a_max / (IM_PI * 2.0f);
const int a_min_sample = a_is_reverse ? (int)ImFloor(a_min_sample_f) : (int)ImCeil(a_min_sample_f);
const int a_max_sample = a_is_reverse ? (int)ImCeil(a_max_sample_f) : (int)ImFloor(a_max_sample_f);
const int a_mid_samples = a_is_reverse ? ImMax(a_min_sample - a_max_sample, 0) : ImMax(a_max_sample - a_min_sample, 0);
const float a_min_segment_angle = a_min_sample * IM_PI * 2.0f / IM_DRAWLIST_ARCFAST_SAMPLE_MAX;
const float a_max_segment_angle = a_max_sample * IM_PI * 2.0f / IM_DRAWLIST_ARCFAST_SAMPLE_MAX;
const bool a_emit_start = ImAbs(a_min_segment_angle - a_min) >= 1e-5f;
const bool a_emit_end = ImAbs(a_max - a_max_segment_angle) >= 1e-5f;
_Path.reserve(_Path.Size + (a_mid_samples + 1 + (a_emit_start ? 1 : 0) + (a_emit_end ? 1 : 0)));
if (a_emit_start)
_Path.push_back(ImVec2(center.x + ImCos(a_min) * radius, center.y + ImSin(a_min) * radius));
if (a_mid_samples > 0)
_PathArcToFastEx(center, radius, a_min_sample, a_max_sample, 0);
if (a_emit_end)
_Path.push_back(ImVec2(center.x + ImCos(a_max) * radius, center.y + ImSin(a_max) * radius));
}
else
{
const float arc_length = ImAbs(a_max - a_min);
const int circle_segment_count = _CalcCircleAutoSegmentCount(radius);
const int arc_segment_count = ImMax((int)ImCeil(circle_segment_count * arc_length / (IM_PI * 2.0f)), (int)(2.0f * IM_PI / arc_length));
_PathArcToN(center, radius, a_min, a_max, arc_segment_count);
}
}
void ImDrawList::PathEllipticalArcTo(const ImVec2& center, float radius_x, float radius_y, float rot, float a_min, float a_max, int num_segments)
{
if (num_segments <= 0)
num_segments = _CalcCircleAutoSegmentCount(ImMax(radius_x, radius_y)); // A bit pessimistic, maybe there's a better computation to do here.
_Path.reserve(_Path.Size + (num_segments + 1));
const float cos_rot = ImCos(rot);
const float sin_rot = ImSin(rot);
for (int i = 0; i <= num_segments; i++)
{
const float a = a_min + ((float)i / (float)num_segments) * (a_max - a_min);
ImVec2 point(ImCos(a) * radius_x, ImSin(a) * radius_y);
const float rel_x = (point.x * cos_rot) - (point.y * sin_rot);
const float rel_y = (point.x * sin_rot) + (point.y * cos_rot);
point.x = rel_x + center.x;
point.y = rel_y + center.y;
_Path.push_back(point);
}
}
ImVec2 ImBezierCubicCalc(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const ImVec2& p4, float t)
{
float u = 1.0f - t;
float w1 = u * u * u;
float w2 = 3 * u * u * t;
float w3 = 3 * u * t * t;
float w4 = t * t * t;
return ImVec2(w1 * p1.x + w2 * p2.x + w3 * p3.x + w4 * p4.x, w1 * p1.y + w2 * p2.y + w3 * p3.y + w4 * p4.y);
}
ImVec2 ImBezierQuadraticCalc(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, float t)
{
float u = 1.0f - t;
float w1 = u * u;
float w2 = 2 * u * t;
float w3 = t * t;
return ImVec2(w1 * p1.x + w2 * p2.x + w3 * p3.x, w1 * p1.y + w2 * p2.y + w3 * p3.y);
}
// Closely mimics ImBezierCubicClosestPointCasteljau() in imgui.cpp
static void PathBezierCubicCurveToCasteljau(ImVector<ImVec2>* path, float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4, float tess_tol, int level)
{
float dx = x4 - x1;
float dy = y4 - y1;
float d2 = (x2 - x4) * dy - (y2 - y4) * dx;
float d3 = (x3 - x4) * dy - (y3 - y4) * dx;
d2 = (d2 >= 0) ? d2 : -d2;
d3 = (d3 >= 0) ? d3 : -d3;
if ((d2 + d3) * (d2 + d3) < tess_tol * (dx * dx + dy * dy))
{
path->push_back(ImVec2(x4, y4));
}
else if (level < 10)
{
float x12 = (x1 + x2) * 0.5f, y12 = (y1 + y2) * 0.5f;
float x23 = (x2 + x3) * 0.5f, y23 = (y2 + y3) * 0.5f;
float x34 = (x3 + x4) * 0.5f, y34 = (y3 + y4) * 0.5f;
float x123 = (x12 + x23) * 0.5f, y123 = (y12 + y23) * 0.5f;
float x234 = (x23 + x34) * 0.5f, y234 = (y23 + y34) * 0.5f;
float x1234 = (x123 + x234) * 0.5f, y1234 = (y123 + y234) * 0.5f;
PathBezierCubicCurveToCasteljau(path, x1, y1, x12, y12, x123, y123, x1234, y1234, tess_tol, level + 1);
PathBezierCubicCurveToCasteljau(path, x1234, y1234, x234, y234, x34, y34, x4, y4, tess_tol, level + 1);
}
}
static void PathBezierQuadraticCurveToCasteljau(ImVector<ImVec2>* path, float x1, float y1, float x2, float y2, float x3, float y3, float tess_tol, int level)
{
float dx = x3 - x1, dy = y3 - y1;
float det = (x2 - x3) * dy - (y2 - y3) * dx;
if (det * det * 4.0f < tess_tol * (dx * dx + dy * dy))
{
path->push_back(ImVec2(x3, y3));
}
else if (level < 10)
{
float x12 = (x1 + x2) * 0.5f, y12 = (y1 + y2) * 0.5f;
float x23 = (x2 + x3) * 0.5f, y23 = (y2 + y3) * 0.5f;
float x123 = (x12 + x23) * 0.5f, y123 = (y12 + y23) * 0.5f;
PathBezierQuadraticCurveToCasteljau(path, x1, y1, x12, y12, x123, y123, tess_tol, level + 1);
PathBezierQuadraticCurveToCasteljau(path, x123, y123, x23, y23, x3, y3, tess_tol, level + 1);
}
}
void ImDrawList::PathBezierCubicCurveTo(const ImVec2& p2, const ImVec2& p3, const ImVec2& p4, int num_segments)
{
ImVec2 p1 = _Path.back();
if (num_segments == 0)
{
IM_ASSERT(_Data->CurveTessellationTol > 0.0f);
PathBezierCubicCurveToCasteljau(&_Path, p1.x, p1.y, p2.x, p2.y, p3.x, p3.y, p4.x, p4.y, _Data->CurveTessellationTol, 0); // Auto-tessellated
}
else
{
float t_step = 1.0f / (float)num_segments;
for (int i_step = 1; i_step <= num_segments; i_step++)
_Path.push_back(ImBezierCubicCalc(p1, p2, p3, p4, t_step * i_step));
}
}
void ImDrawList::PathBezierQuadraticCurveTo(const ImVec2& p2, const ImVec2& p3, int num_segments)
{
ImVec2 p1 = _Path.back();
if (num_segments == 0)
{
IM_ASSERT(_Data->CurveTessellationTol > 0.0f);
PathBezierQuadraticCurveToCasteljau(&_Path, p1.x, p1.y, p2.x, p2.y, p3.x, p3.y, _Data->CurveTessellationTol, 0);// Auto-tessellated
}
else
{
float t_step = 1.0f / (float)num_segments;
for (int i_step = 1; i_step <= num_segments; i_step++)
_Path.push_back(ImBezierQuadraticCalc(p1, p2, p3, t_step * i_step));
}
}
static inline ImDrawFlags FixRectCornerFlags(ImDrawFlags flags)
{
/*
IM_STATIC_ASSERT(ImDrawFlags_RoundCornersTopLeft == (1 << 4));
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
// Obsoleted in 1.82 (from February 2021). This code was stripped/simplified and mostly commented in 1.90 (from September 2023)
// - Legacy Support for hard coded ~0 (used to be a suggested equivalent to ImDrawCornerFlags_All)
if (flags == ~0) { return ImDrawFlags_RoundCornersAll; }
// - Legacy Support for hard coded 0x01 to 0x0F (matching 15 out of 16 old flags combinations). Read details in older version of this code.
if (flags >= 0x01 && flags <= 0x0F) { return (flags << 4); }
// We cannot support hard coded 0x00 with 'float rounding > 0.0f' --> replace with ImDrawFlags_RoundCornersNone or use 'float rounding = 0.0f'
#endif
*/
// If this assert triggers, please update your code replacing hardcoded values with new ImDrawFlags_RoundCorners* values.
// Note that ImDrawFlags_Closed (== 0x01) is an invalid flag for AddRect(), AddRectFilled(), PathRect() etc. anyway.
// See details in 1.82 Changelog as well as 2021/03/12 and 2023/09/08 entries in "API BREAKING CHANGES" section.
IM_ASSERT((flags & 0x0F) == 0 && "Misuse of legacy hardcoded ImDrawCornerFlags values!");
if ((flags & ImDrawFlags_RoundCornersMask_) == 0)
flags |= ImDrawFlags_RoundCornersAll;
return flags;
}
void ImDrawList::PathRect(const ImVec2& a, const ImVec2& b, float rounding, ImDrawFlags flags)
{
if (rounding >= 0.5f)
{
flags = FixRectCornerFlags(flags);
rounding = ImMin(rounding, ImFabs(b.x - a.x) * (((flags & ImDrawFlags_RoundCornersTop) == ImDrawFlags_RoundCornersTop) || ((flags & ImDrawFlags_RoundCornersBottom) == ImDrawFlags_RoundCornersBottom) ? 0.5f : 1.0f) - 1.0f);
rounding = ImMin(rounding, ImFabs(b.y - a.y) * (((flags & ImDrawFlags_RoundCornersLeft) == ImDrawFlags_RoundCornersLeft) || ((flags & ImDrawFlags_RoundCornersRight) == ImDrawFlags_RoundCornersRight) ? 0.5f : 1.0f) - 1.0f);
}
if (rounding < 0.5f || (flags & ImDrawFlags_RoundCornersMask_) == ImDrawFlags_RoundCornersNone)
{
PathLineTo(a);
PathLineTo(ImVec2(b.x, a.y));
PathLineTo(b);
PathLineTo(ImVec2(a.x, b.y));
}
else
{
const float rounding_tl = (flags & ImDrawFlags_RoundCornersTopLeft) ? rounding : 0.0f;
const float rounding_tr = (flags & ImDrawFlags_RoundCornersTopRight) ? rounding : 0.0f;
const float rounding_br = (flags & ImDrawFlags_RoundCornersBottomRight) ? rounding : 0.0f;
const float rounding_bl = (flags & ImDrawFlags_RoundCornersBottomLeft) ? rounding : 0.0f;
PathArcToFast(ImVec2(a.x + rounding_tl, a.y + rounding_tl), rounding_tl, 6, 9);
PathArcToFast(ImVec2(b.x - rounding_tr, a.y + rounding_tr), rounding_tr, 9, 12);
PathArcToFast(ImVec2(b.x - rounding_br, b.y - rounding_br), rounding_br, 0, 3);
PathArcToFast(ImVec2(a.x + rounding_bl, b.y - rounding_bl), rounding_bl, 3, 6);
}
}
void ImDrawList::AddLine(const ImVec2& p1, const ImVec2& p2, ImU32 col, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(p1 + ImVec2(0.5f, 0.5f));
PathLineTo(p2 + ImVec2(0.5f, 0.5f));
PathStroke(col, 0, thickness);
}
// Add instructions to draw a rectangle with rounded corners to the draw list
// a is the top-left coordinate of the rectangle, b is the bottom-right
// flags should contains a mask indicating which corners should be drawn rounded
// Returns true if the rectangle was drawn, false for some reason it couldn't
// be (in which case the caller should try again with the regular path drawing API)
// We are using the textures generated by ImFontAtlasBuildRenderRoundCornersTexData()
inline bool AddRoundCornerRect(ImDrawList* draw_list, const ImVec2& a, const ImVec2& b, ImU32 col, float rounding, float thickness, ImDrawFlags flags, bool fill)
{
if (!(draw_list->Flags & ImDrawListFlags_RoundCornersUseTex)) // Disabled by the draw list flags
return false;
#if 1
flags = FixRectCornerFlags(flags);
rounding = ImMin(rounding, ImFabs(b.x - a.x) * (((flags & ImDrawFlags_RoundCornersTop) == ImDrawFlags_RoundCornersTop) || ((flags & ImDrawFlags_RoundCornersBottom) == ImDrawFlags_RoundCornersBottom) ? 0.5f : 1.0f) - 1.0f);
rounding = ImMin(rounding, ImFabs(b.y - a.y) * (((flags & ImDrawFlags_RoundCornersLeft) == ImDrawFlags_RoundCornersLeft) || ((flags & ImDrawFlags_RoundCornersRight) == ImDrawFlags_RoundCornersRight) ? 0.5f : 1.0f) - 1.0f);
#endif
const ImDrawListSharedData* data = draw_list->_Data;
IM_ASSERT_PARANOID(!(data->Font->ContainerAtlas->Flags & ImFontAtlasFlags_NoBakedRoundCorners)); // No data in font
// Filled rectangles have no stroke width
const int stroke_width = fill ? 1 : (int)thickness;
if (stroke_width <= 0 || (int)stroke_width > ImFontAtlasRoundCornersMaxStrokeWidth)
return false; // We can't handle this
// If we have a >1 stroke width, we actually need to increase the radius appropriately as well to match how the geometry renderer does things
const int rad = (int)rounding + (stroke_width - 1);
// We don't support zero radius
if (rad <= 0 || rad > ImFontAtlasRoundCornersMaxSize)
return false; // We can't handle this
// This is a very awkward special case - if two opposing corners are curved *and* the width/height of the rectangle is <= 2x radius, the non-curved corner overlaps with the curved one
// Technically this is fixable but it's a major PITA to do so instead we just don't support that (hopefully very rare) case
const ImDrawFlags corner_flags = (flags & ImDrawFlags_RoundCornersMask_);
if ((((b.x - a.x) <= (rad * 2)) || ((b.y - a.y) <= (rad * 2))) &&
((corner_flags == (ImDrawFlags_RoundCornersTopLeft | ImDrawFlags_RoundCornersBottomRight)) || (corner_flags == (ImDrawFlags_RoundCornersTopRight | ImDrawFlags_RoundCornersBottomLeft))))
return false;
const int square_rad = stroke_width + (stroke_width - 1); // Radius to use for square corners and sides - because increasing stroke width grows the line on both sides, we need to do this slightly odd calculation
// Another awkward special case - if rectangle is smaller than the stroke width then we can get bits of one corner poking out from the other at small sizes when we draw a non-filled rect with a mix of rounded and square corners
// (technically this test can be refined to check for possible left/right and top/bottom clashes independently, but it's almost certainly not worth the added complexity)
if ((((b.x - a.x) <= square_rad) || ((b.y - a.y) <= square_rad)) && (!fill) &&
(corner_flags != 0) && (corner_flags != ImDrawFlags_RoundCornersAll))
return false;
const unsigned int index = (stroke_width - 1) + ((rad - 1) * ImFontAtlasRoundCornersMaxStrokeWidth);
ImFontRoundedCornerData& round_corner_data = (*data->TexRoundCornerData)[index];
const unsigned int square_index = (stroke_width - 1) + ((square_rad - 1) * ImFontAtlasRoundCornersMaxStrokeWidth);
ImFontRoundedCornerData& square_corner_data = (*data->TexSquareCornerData)[square_index];
if ((round_corner_data.RectId < 0) || (square_corner_data.RectId < 0))
return false; // No data for this configuration
IM_ASSERT(data->Font->ContainerAtlas->TexID == draw_list->_TextureIdStack.back()); // Use high-level ImGui::PushFont() or low-level ImDrawList::PushTextureId() to change font.
// Calculate UVs for the three points we are interested in from the texture
// - corner_uv[0] is the innermost point of the circle (solid for filled circles)
// - corner_uv[1] is either straight down or across from it (depending on if we are using the filled or stroked version)
// - corner_uv[2] is diagonally across from it
// - corner_uv[1] is always solid (either inside the circle or on the line), whilst corner_uv[2] is always blank
// This represents a 45 degree "wedge" of circle, which then gets mirrored here to produce a 90 degree curve
// See ImFontAtlasBuildRenderRoundCornersTexData() for more details of the texture contents
// If use_alternative_uvs is true then this means we are drawing a stroked texture that has been packed into the "filled"
// corner of the area on the texture page, so we need to calculate UVs appropriately
const ImVec4& round_uvs = fill ? round_corner_data.TexUvFilled : round_corner_data.TexUvStroked;
const bool round_use_alternative_uvs = fill | round_corner_data.StrokedUsesAlternateUVs;
const ImVec2 round_corner_uv[3] =
{
ImVec2(round_uvs.x, round_uvs.y),
round_use_alternative_uvs ? ImVec2(round_uvs.x, round_uvs.w) : ImVec2(round_uvs.z, round_uvs.y),
ImVec2(round_uvs.z, round_uvs.w)
};
// Do the same for square corners
const ImVec4& square_uvs = fill ? square_corner_data.TexUvFilled : square_corner_data.TexUvStroked;
const bool square_use_alternative_uvs = fill | square_corner_data.StrokedUsesAlternateUVs;
const ImVec2 square_corner_uv[3] =
{
ImVec2(square_uvs.x, square_uvs.y),
square_use_alternative_uvs ? ImVec2(square_uvs.x, square_uvs.w) : ImVec2(square_uvs.z, square_uvs.y),
ImVec2(square_uvs.z, square_uvs.w)
};
// In this code A-D represent the four corners of the rectangle, going clockwise from the top-left:
//
// A---B
// | |
// D---C
const bool ba = (flags & ImDrawFlags_RoundCornersTopLeft) != 0;
const bool bb = (flags & ImDrawFlags_RoundCornersTopRight) != 0;
const bool bc = (flags & ImDrawFlags_RoundCornersBottomRight) != 0;
const bool bd = (flags & ImDrawFlags_RoundCornersBottomLeft) != 0;
// Flags indicating which sides should use the rounded texture
const bool side_rounded_l = fill && (ba || bd);
const bool side_rounded_r = fill && (bb || bc);
const bool side_rounded_t = fill && (ba || bb);
const bool side_rounded_b = fill && (bd || bc);
// UVs to use for each corner and the edges
const ImVec2* corner_uv_a = ba ? round_corner_uv : square_corner_uv;
const ImVec2* corner_uv_b = bb ? round_corner_uv : square_corner_uv;
const ImVec2* corner_uv_c = bc ? round_corner_uv : square_corner_uv;
const ImVec2* corner_uv_d = bd ? round_corner_uv : square_corner_uv;
const ImVec2* edge_uv_l = side_rounded_l ? round_corner_uv : square_corner_uv;
const ImVec2* edge_uv_r = side_rounded_r ? round_corner_uv : square_corner_uv;
const ImVec2* edge_uv_t = side_rounded_t ? round_corner_uv : square_corner_uv;
const ImVec2* edge_uv_b = side_rounded_b ? round_corner_uv : square_corner_uv;
// The base vertices for the rectangle
//
// C are the corner vertices, I the interior ones,
// and M the intermediate points on the edge of each
// rounded section, as shown below:
//
// CA--MAY--------MBY--CB
// | |
// MAX IA--------IB MBX
// | | | |
// | | | |
// MDX ID--------IC MCX
// | |
// CD--MDY--------MCY--CC
// Adjust size to account for the fact that wider strokes draw "outside the box"
const float stroke_width_size_expansion = stroke_width - 1.0f;
// The thickness of each edge piece
const int left_side_thickness = side_rounded_l ? rad : square_rad;
const int right_side_thickness = side_rounded_r ? rad : square_rad;
const int top_side_thickness = side_rounded_t ? rad : square_rad;
const int bottom_side_thickness = side_rounded_b ? rad : square_rad;
// The sizes of the corner pieces
const int size_a = ba ? rad : square_rad;
const int size_b = bb ? rad : square_rad;
const int size_c = bc ? rad : square_rad;
const int size_d = bd ? rad : square_rad;
const ImVec2 ca(a.x - stroke_width_size_expansion, a.y - stroke_width_size_expansion), cb(b.x + stroke_width_size_expansion, a.y - stroke_width_size_expansion);
const ImVec2 may(ca.x + size_a, ca.y), mby(cb.x - size_b, cb.y);
const ImVec2 max(ca.x, ca.y + size_a), mbx(cb.x, cb.y + size_b);
const ImVec2 ia(ca.x + size_a, ca.y + size_a), ib(cb.x - size_b, cb.y + size_b);
const ImVec2 cc(b.x + stroke_width_size_expansion, b.y + stroke_width_size_expansion), cd(a.x - stroke_width_size_expansion, b.y + stroke_width_size_expansion);
const ImVec2 mdx(cd.x, cd.y - size_d), mcx(cc.x, cc.y - size_c);
const ImVec2 mdy(cd.x + size_d, cd.y), mcy(cc.x - size_c, cc.y);
const ImVec2 id(cd.x + size_d, cd.y - size_d), ic(cc.x - size_c, cc.y - size_c);
// Positions for edge vertices
//
// Each letter of the name refers to one of (t)op, (b)ottom, (l)eft or (r)ight
// The first letter is the edge, and the second and third are the position on that edge, so for example:
// tbr = (t)op edge, (b)ottom (r)ight vertex
const ImVec2 ttl = may;
const ImVec2 ttr = mby;
const ImVec2 tbr(mby.x, mby.y + (fill ? size_b : top_side_thickness));
const ImVec2 tbl(may.x, may.y + (fill ? size_a : top_side_thickness));
const ImVec2 btl(mdy.x, mdy.y - (fill ? size_d : bottom_side_thickness));
const ImVec2 btr(mcy.x, mcy.y - (fill ? size_c : bottom_side_thickness));
const ImVec2 bbr = mcy;
const ImVec2 bbl = mdy;
const ImVec2 ltl = max;
const ImVec2 ltr(max.x + (fill ? size_a : left_side_thickness), max.y);
const ImVec2 lbr(mdx.x + (fill ? size_d : left_side_thickness), mdx.y);
const ImVec2 lbl = mdx;
const ImVec2 rtl(mbx.x - (fill ? size_b : right_side_thickness), mbx.y);
const ImVec2 rtr = mbx;
const ImVec2 rbr = mcx;
const ImVec2 rbl(mcx.x - (fill ? size_c : right_side_thickness), mcx.y);
// Reserve enough space for the vertices/indices
const int vtcs = fill ? (4 * 9) : (4 * 8);
const int idcs = fill ? (6 * 9) : (6 * 8);
draw_list->PrimReserve(idcs, vtcs);
const ImDrawIdx idx = (ImDrawIdx)draw_list->_VtxCurrentIdx;
// Snap a position to the nearest pixel to ensure correct rasterisation
#define SNAP_POS(vec) (ImVec2(ImTrunc((vec).x + 0.5f), ImTrunc((vec).y + 0.5f)))
// Write a corner vertex to the draw list, with d being the vertex index,
// p the position, c is the corner and i the index into the UV list
#define VTX_WRITE_CORNER(d, p, c, i) \
draw_list->_VtxWritePtr[d].pos = SNAP_POS(p); \
draw_list->_VtxWritePtr[d].uv = corner_uv_##c[(i)]; \
draw_list->_VtxWritePtr[d].col = col
// Write a vertex for one of the edge sections, with d being the vertex index,
// p the position, e is the edge (t/l/b/r) and i the index into the UV list
#define VTX_WRITE_EDGE(d, p, e, i) \
draw_list->_VtxWritePtr[d].pos = SNAP_POS(p); \
draw_list->_VtxWritePtr[d].uv = edge_uv_##e[(i)]; \
draw_list->_VtxWritePtr[d].col = col
// Write a vertex for the center fill, with d being the vertex index and
// p the position
#define VTX_WRITE_FILL(d, p) \
draw_list->_VtxWritePtr[d].pos = SNAP_POS(p); \
draw_list->_VtxWritePtr[d].uv = round_corner_uv[0]; \
draw_list->_VtxWritePtr[d].col = col
int dv = 0; // A count of the number of vertices we've written
int di = 0; // The number of indices we have written
// Write a triangle using three indices
#define IDX_WRITE_TRI(idx0, idx1, idx2) \
draw_list->_IdxWritePtr[di] = (ImDrawIdx)(idx+(idx0)); \
draw_list->_IdxWritePtr[di+1] = (ImDrawIdx)(idx+(idx1)); \
draw_list->_IdxWritePtr[di+2] = (ImDrawIdx)(idx+(idx2)); \
di += 3
// Top-left corner
{
VTX_WRITE_CORNER(dv + 0, ca, a, 2);
VTX_WRITE_CORNER(dv + 1, may, a, 1);
VTX_WRITE_CORNER(dv + 2, ia, a, 0);
VTX_WRITE_CORNER(dv + 3, max, a, 1);
IDX_WRITE_TRI(dv + 0, dv + 1, dv + 2);
IDX_WRITE_TRI(dv + 0, dv + 2, dv + 3);
dv += 4;
}
// Top-right corner
{
VTX_WRITE_CORNER(dv + 0, cb, b, 2);
VTX_WRITE_CORNER(dv + 1, mbx, b, 1);
VTX_WRITE_CORNER(dv + 2, ib, b, 0);
VTX_WRITE_CORNER(dv + 3, mby, b, 1);
IDX_WRITE_TRI(dv + 0, dv + 1, dv + 2);
IDX_WRITE_TRI(dv + 0, dv + 2, dv + 3);
dv += 4;
}
// Bottom-right corner
{
VTX_WRITE_CORNER(dv + 0, ic, c, 0);
VTX_WRITE_CORNER(dv + 1, mcx, c, 1);
VTX_WRITE_CORNER(dv + 2, cc, c, 2);
VTX_WRITE_CORNER(dv + 3, mcy, c, 1);
IDX_WRITE_TRI(dv + 0, dv + 1, dv + 2);
IDX_WRITE_TRI(dv + 0, dv + 2, dv + 3);
dv += 4;
}
// Bottom-left corner
{
VTX_WRITE_CORNER(dv + 0, cd, d, 2);
VTX_WRITE_CORNER(dv + 1, mdx, d, 1);
VTX_WRITE_CORNER(dv + 2, id, d, 0);
VTX_WRITE_CORNER(dv + 3, mdy, d, 1);
IDX_WRITE_TRI(dv + 0, dv + 1, dv + 2);
IDX_WRITE_TRI(dv + 0, dv + 2, dv + 3);
dv += 4;
}
// Top edge
{
VTX_WRITE_EDGE(dv + 0, ttl, t, 1);
VTX_WRITE_EDGE(dv + 1, ttr, t, 1);
VTX_WRITE_EDGE(dv + 2, tbr, t, 0);
VTX_WRITE_EDGE(dv + 3, tbl, t, 0);
IDX_WRITE_TRI(dv + 0, dv + 1, dv + 2);
IDX_WRITE_TRI(dv + 0, dv + 2, dv + 3);
dv += 4;
}
// Right edge
{
VTX_WRITE_EDGE(dv + 0, rtl, r, 0);
VTX_WRITE_EDGE(dv + 1, rtr, r, 1);
VTX_WRITE_EDGE(dv + 2, rbr, r, 1);
VTX_WRITE_EDGE(dv + 3, rbl, r, 0);
IDX_WRITE_TRI(dv + 0, dv + 1, dv + 2);
IDX_WRITE_TRI(dv + 0, dv + 2, dv + 3);
dv += 4;
}
// Bottom edge
{
VTX_WRITE_EDGE(dv + 0, btl, b, 0);
VTX_WRITE_EDGE(dv + 1, btr, b, 0);
VTX_WRITE_EDGE(dv + 2, bbr, b, 1);
VTX_WRITE_EDGE(dv + 3, bbl, b, 1);
IDX_WRITE_TRI(dv + 0, dv + 1, dv + 2);
IDX_WRITE_TRI(dv + 0, dv + 2, dv + 3);
dv += 4;
}
// Left edge
{
VTX_WRITE_EDGE(dv + 0, ltl, l, 1);
VTX_WRITE_EDGE(dv + 1, ltr, l, 0);
VTX_WRITE_EDGE(dv + 2, lbr, l, 0);
VTX_WRITE_EDGE(dv + 3, lbl, l, 1);
IDX_WRITE_TRI(dv + 0, dv + 1, dv + 2);
IDX_WRITE_TRI(dv + 0, dv + 2, dv + 3);
dv += 4;
}
// Fill
if (fill)
{
VTX_WRITE_FILL(dv + 0, ia);
VTX_WRITE_FILL(dv + 1, ib);
VTX_WRITE_FILL(dv + 2, ic);
VTX_WRITE_FILL(dv + 3, id);
IDX_WRITE_TRI(dv + 0, dv + 1, dv + 2);
IDX_WRITE_TRI(dv + 0, dv + 2, dv + 3);
dv += 4;
}
draw_list->_VtxWritePtr += dv;
draw_list->_VtxCurrentIdx += dv;
draw_list->_IdxWritePtr += di;
IM_ASSERT_PARANOID(di == idcs);
IM_ASSERT_PARANOID(dv == vtcs);
// Return any unused vertices/indices
// (not required ATM as we always generate the right number)
//draw_list->PrimUnreserve(idcs - di, vtcs - dv);
#undef SNAP_POS
#undef IDX_WRITE_TRI
#undef VTX_WRITE_CORNER
#undef VTX_WRITE_EDGE
#undef VTX_WRITE_FILL
return true;
}
// p_min = upper-left, p_max = lower-right
// Note we don't render 1 pixels sized rectangles properly.
void ImDrawList::AddRect(const ImVec2& p_min, const ImVec2& p_max, ImU32 col, float rounding, ImDrawFlags flags, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
#if 1
flags = FixRectCornerFlags(flags);
rounding = ImMin(rounding, ImFabs(p_max.x - p_min.x) * (((flags & ImDrawFlags_RoundCornersTop) == ImDrawFlags_RoundCornersTop) || ((flags & ImDrawFlags_RoundCornersBottom) == ImDrawFlags_RoundCornersBottom) ? 0.5f : 1.0f) - 1.0f);
rounding = ImMin(rounding, ImFabs(p_max.y - p_min.y) * (((flags & ImDrawFlags_RoundCornersLeft) == ImDrawFlags_RoundCornersLeft) || ((flags & ImDrawFlags_RoundCornersRight) == ImDrawFlags_RoundCornersRight) ? 0.5f : 1.0f) - 1.0f);
#endif
// Try to use fast path if we can
if (rounding > 0)
if (AddRoundCornerRect(this, p_min, p_max, col, rounding, thickness, flags, /* fill */ false))
return;
if (Flags & ImDrawListFlags_AntiAliasedLines)
PathRect(p_min + ImVec2(0.50f, 0.50f), p_max - ImVec2(0.50f, 0.50f), rounding, flags);
else
PathRect(p_min + ImVec2(0.50f, 0.50f), p_max - ImVec2(0.49f, 0.49f), rounding, flags); // Better looking lower-right corner and rounded non-AA shapes.
PathStroke(col, ImDrawFlags_Closed, thickness);
}
void ImDrawList::AddRectFilled(const ImVec2& p_min, const ImVec2& p_max, ImU32 col, float rounding, ImDrawFlags flags)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
#if 1
flags = FixRectCornerFlags(flags);
rounding = ImMin(rounding, ImFabs(p_max.x - p_min.x) * (((flags & ImDrawFlags_RoundCornersTop) == ImDrawFlags_RoundCornersTop) || ((flags & ImDrawFlags_RoundCornersBottom) == ImDrawFlags_RoundCornersBottom) ? 0.5f : 1.0f) - 1.0f);
rounding = ImMin(rounding, ImFabs(p_max.y - p_min.y) * (((flags & ImDrawFlags_RoundCornersLeft) == ImDrawFlags_RoundCornersLeft) || ((flags & ImDrawFlags_RoundCornersRight) == ImDrawFlags_RoundCornersRight) ? 0.5f : 1.0f) - 1.0f);
#endif
if (rounding < 0.5f || (flags & ImDrawFlags_RoundCornersMask_) == ImDrawFlags_RoundCornersNone)
{
PrimReserve(6, 4);
PrimRect(p_min, p_max, col);
}
else
{
// Try fast path first
if (AddRoundCornerRect(this, p_min, p_max, col, rounding, 1.0f, flags, /* fill */ true))
return;
PathRect(p_min, p_max, rounding, flags);
PathFillConvex(col);
}
}
// p_min = upper-left, p_max = lower-right
void ImDrawList::AddRectFilledMultiColor(const ImVec2& p_min, const ImVec2& p_max, ImU32 col_upr_left, ImU32 col_upr_right, ImU32 col_bot_right, ImU32 col_bot_left)
{
if (((col_upr_left | col_upr_right | col_bot_right | col_bot_left) & IM_COL32_A_MASK) == 0)
return;
const ImVec2 uv = _Data->TexUvWhitePixel;
PrimReserve(6, 4);
PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx + 1)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx + 2));
PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx + 2)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx + 3));
PrimWriteVtx(p_min, uv, col_upr_left);
PrimWriteVtx(ImVec2(p_max.x, p_min.y), uv, col_upr_right);
PrimWriteVtx(p_max, uv, col_bot_right);
PrimWriteVtx(ImVec2(p_min.x, p_max.y), uv, col_bot_left);
}
void ImDrawList::AddQuad(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const ImVec2& p4, ImU32 col, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(p1);
PathLineTo(p2);
PathLineTo(p3);
PathLineTo(p4);
PathStroke(col, ImDrawFlags_Closed, thickness);
}
void ImDrawList::AddQuadFilled(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const ImVec2& p4, ImU32 col)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(p1);
PathLineTo(p2);
PathLineTo(p3);
PathLineTo(p4);
PathFillConvex(col);
}
void ImDrawList::AddTriangle(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, ImU32 col, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(p1);
PathLineTo(p2);
PathLineTo(p3);
PathStroke(col, ImDrawFlags_Closed, thickness);
}
void ImDrawList::AddTriangleFilled(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, ImU32 col)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(p1);
PathLineTo(p2);
PathLineTo(p3);
PathFillConvex(col);
}
// Draw a circle using the rounded corner textures
// Returns true if the circle was drawn, or false if for some reason it could not be
// (in which case the caller should try the regular circle drawing code)
inline bool AddRoundCornerCircle(ImDrawList* draw_list, const ImVec2& center, float radius, float thickness, ImU32 col, bool fill)
{
if (!(draw_list->Flags & ImDrawListFlags_RoundCornersUseTex)) // Disabled by the draw list flags
return false;
const ImDrawListSharedData* data = draw_list->_Data;
IM_ASSERT(data->Font->ContainerAtlas->TexID == draw_list->_TextureIdStack.back()); // Use high-level ImGui::PushFont() or low-level ImDrawList::PushTextureId() to change font.
IM_ASSERT_PARANOID(!(data->Font->ContainerAtlas->Flags & ImFontAtlasFlags_NoBakedRoundCorners)); // No data in font
// Filled rectangles have no stroke width
const int stroke_width = fill ? 1 : (int)thickness;
if ((stroke_width <= 0) ||
(stroke_width > ImFontAtlasRoundCornersMaxStrokeWidth))
return false; // We can't handle this
// If we have a >1 stroke width, we actually need to increase the radius appropriately as well to match how the geometry renderer does things
const int rad = (int)radius + (stroke_width - 1);
// We don't support zero radius
if ((rad <= 0) || (rad > ImFontAtlasRoundCornersMaxSize))
return false; // We can't handle this
const unsigned int index = (stroke_width - 1) + ((rad - 1) * ImFontAtlasRoundCornersMaxStrokeWidth);
ImFontRoundedCornerData& round_corner_data = (*data->TexRoundCornerData)[index];
if (round_corner_data.RectId < 0)
return false; // No data for this configuration
// Calculate UVs for the three points we are interested in from the texture
// corner_uv[0] is the innermost point of the circle (solid for filled circles)
// corner_uv[1] is either straight down or across from it (depending on if we are using the filled or stroked version)
// corner_uv[2] is diagonally across from it
// corner_uv[1] is always solid (either inside the circle or on the line), whilst corner_uv[2] is always blank
// This represents a 45 degree "wedge" of circle, which then gets mirrored here to produce a 90 degree curve
// See ImFontAtlasBuildRenderRoundCornersTexData() for more details of the texture contents
// If use_alternative_uvs is true then this means we are drawing a stroked texture that has been packed into the "filled"
// corner of the rectangle, so we need to calculate UVs appropriately
const ImVec4& uvs = fill ? round_corner_data.TexUvFilled : round_corner_data.TexUvStroked;
const bool use_alternative_uvs = fill | round_corner_data.StrokedUsesAlternateUVs;
const ImVec2 corner_uv[3] =
{
ImVec2(uvs.x, uvs.y),
use_alternative_uvs ? ImVec2(uvs.x, uvs.w) : ImVec2(uvs.z, uvs.y),
ImVec2(uvs.z, uvs.w)
};
// Calculate the circle bounds
const ImVec2& c = center;
ImVec2 tl = ImVec2(c.x - rad, c.y - rad);
ImVec2 br = ImVec2(c.x + rad, c.y + rad);
// Some useful constants for our calculations
const float half_sqrt_two = 0.70710678f; // sqrtf(2.0f) * 0.5f
const float width_offset_parametric = round_corner_data.ParametricStrokeWidth; // Stroke width in our parametric coordinate space
const int num_verts = fill ? 9 : 16; // Number of vertices we are going to write
const int num_indices = fill ? 24 : 48; // Number of indices we are going to write
draw_list->PrimReserve(num_indices, num_verts);
// Write a vertex
// - d is the vertex index to write to
// - vert_pos is the vertex position
// - uv_coord is the UV coordinate
#define VTX_WRITE(d, vert_pos, uv_coord) \
draw_list->_VtxWritePtr[d].pos = vert_pos; \
draw_list->_VtxWritePtr[d].uv = uv_coord; \
draw_list->_VtxWritePtr[d].col = col
// Edge vertices working around the circle clockwise from the left
VTX_WRITE(0, ImVec2(tl.x, c.y), corner_uv[1]);
VTX_WRITE(1, tl, corner_uv[2]);
VTX_WRITE(2, ImVec2(c.x, tl.y), corner_uv[1]);
VTX_WRITE(3, ImVec2(br.x, tl.y), corner_uv[2]);
VTX_WRITE(4, ImVec2(br.x, c.y), corner_uv[1]);
VTX_WRITE(5, br, corner_uv[2]);
VTX_WRITE(6, ImVec2(c.x, br.y), corner_uv[1]);
VTX_WRITE(7, ImVec2(tl.x, br.y), corner_uv[2]);
if (fill)
{
// The center
VTX_WRITE(8, c, corner_uv[0]);
}
else
{
// Inside vertices on the diagonals of each quadrant
const ImVec2 tlbi = ImVec2(ImLerp(c.x, tl.x, half_sqrt_two - width_offset_parametric), ImLerp(c.y, tl.y, half_sqrt_two - width_offset_parametric));
const ImVec2 trbi = ImVec2(ImLerp(c.x, br.x, half_sqrt_two - width_offset_parametric), ImLerp(c.y, tl.y, half_sqrt_two - width_offset_parametric));
const ImVec2 brbi = ImVec2(ImLerp(c.x, br.x, half_sqrt_two - width_offset_parametric), ImLerp(c.y, br.y, half_sqrt_two - width_offset_parametric));
const ImVec2 blbi = ImVec2(ImLerp(c.x, tl.x, half_sqrt_two - width_offset_parametric), ImLerp(c.y, br.y, half_sqrt_two - width_offset_parametric));
// UV for the inside diagonal points
ImVec2 uvbi = ImVec2(ImLerp(corner_uv[0].x, corner_uv[2].x, half_sqrt_two - width_offset_parametric), ImLerp(corner_uv[0].y, corner_uv[2].y, half_sqrt_two - width_offset_parametric));
// Left/right/top/bottom interior positions
const ImVec2 lbi = ImVec2(ImLerp(tl.x, c.x, width_offset_parametric), c.y);
const ImVec2 rbi = ImVec2(ImLerp(br.x, c.x, width_offset_parametric), c.y);
const ImVec2 tbi = ImVec2(c.x, ImLerp(tl.y, c.y, width_offset_parametric));
const ImVec2 bbi = ImVec2(c.x, ImLerp(br.y, c.y, width_offset_parametric));
// UV for the interior cardinal points
ImVec2 uvi_cardinal = use_alternative_uvs ?
ImVec2(corner_uv[0].x, ImLerp(corner_uv[2].y, corner_uv[0].y, width_offset_parametric)) :
ImVec2(ImLerp(corner_uv[2].x, corner_uv[0].x, width_offset_parametric), corner_uv[0].y);
// Inner vertices, starting from the left
VTX_WRITE(8, lbi, uvi_cardinal);
VTX_WRITE(9, tlbi, uvbi);
VTX_WRITE(10, tbi, uvi_cardinal);
VTX_WRITE(11, trbi, uvbi);
VTX_WRITE(12, rbi, uvi_cardinal);
VTX_WRITE(13, brbi, uvbi);
VTX_WRITE(14, bbi, uvi_cardinal);
VTX_WRITE(15, blbi, uvbi);
}
// Write indices for a triangle formed of three indices
// d is the array index to write to
#define IDX_WRITE_TRI(d, idx0, idx1, idx2) \
draw_list->_IdxWritePtr[d+0] = (ImDrawIdx)(idx+idx0); \
draw_list->_IdxWritePtr[d+1] = (ImDrawIdx)(idx+idx1); \
draw_list->_IdxWritePtr[d+2] = (ImDrawIdx)(idx+idx2)
ImDrawIdx idx = (ImDrawIdx)draw_list->_VtxCurrentIdx;
if (fill)
{
// A simple fan of tris from the center
IDX_WRITE_TRI(0, 8, 0, 1);
IDX_WRITE_TRI(3, 8, 1, 2);
IDX_WRITE_TRI(6, 8, 2, 3);
IDX_WRITE_TRI(9, 8, 3, 4);
IDX_WRITE_TRI(12, 8, 4, 5);
IDX_WRITE_TRI(15, 8, 5, 6);
IDX_WRITE_TRI(18, 8, 6, 7);
IDX_WRITE_TRI(21, 8, 7, 0);
}
else
{
// A ring of inner vertices that are tight to the circle, spanning out to the four corners
// Top-left quadrant
IDX_WRITE_TRI(0, 1, 0, 8);
IDX_WRITE_TRI(3, 1, 8, 9);
IDX_WRITE_TRI(6, 1, 9, 10);
IDX_WRITE_TRI(9, 1, 10, 2);
// Top-right quadrant
IDX_WRITE_TRI(12, 3, 2, 10);
IDX_WRITE_TRI(15, 3, 10, 11);
IDX_WRITE_TRI(18, 3, 11, 12);
IDX_WRITE_TRI(21, 3, 12, 4);
// Bottom-right quadrant
IDX_WRITE_TRI(24, 5, 4, 12);
IDX_WRITE_TRI(27, 5, 12, 13);
IDX_WRITE_TRI(30, 5, 13, 14);
IDX_WRITE_TRI(33, 5, 14, 6);
// Bottom-left quadrant
IDX_WRITE_TRI(36, 7, 6, 14);
IDX_WRITE_TRI(39, 7, 14, 15);
IDX_WRITE_TRI(42, 7, 15, 8);
IDX_WRITE_TRI(45, 7, 8, 0);
}
draw_list->_VtxWritePtr += num_verts;
draw_list->_VtxCurrentIdx += num_verts;
draw_list->_IdxWritePtr += num_indices;
#undef IDX_WRITE_TRI
#undef VTX_WRITE
return true;
}
void ImDrawList::AddCircle(const ImVec2& center, float radius, ImU32 col, int num_segments, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0 || radius < 0.5f)
return;
// First try the fast texture-based renderer, and only if that can't handle this fall back to paths
if (AddRoundCornerCircle(this, center, radius, thickness, col, false))
return;
// Obtain segment count
if (num_segments <= 0)
{
// Use arc with automatic segment count
_PathArcToFastEx(center, radius - 0.5f, 0, IM_DRAWLIST_ARCFAST_SAMPLE_MAX, 0);
_Path.Size--;
}
else
{
// Explicit segment count (still clamp to avoid drawing insanely tessellated shapes)
num_segments = ImClamp(num_segments, 3, IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_MAX);
// Because we are filling a closed shape we remove 1 from the count of segments/points
const float a_max = (IM_PI * 2.0f) * ((float)num_segments - 1.0f) / (float)num_segments;
PathArcTo(center, radius - 0.5f, 0.0f, a_max, num_segments - 1);
}
PathStroke(col, ImDrawFlags_Closed, thickness);
}
void ImDrawList::AddCircleFilled(const ImVec2& center, float radius, ImU32 col, int num_segments)
{
if ((col & IM_COL32_A_MASK) == 0 || radius < 0.5f)
return;
// First try the fast texture-based renderer, and only if that can't handle this fall back to paths
if (AddRoundCornerCircle(this, center, radius, 1.0f, col, true))
return;
if (num_segments <= 0)
{
// Use arc with automatic segment count
_PathArcToFastEx(center, radius, 0, IM_DRAWLIST_ARCFAST_SAMPLE_MAX, 0);
_Path.Size--;
}
else
{
// Explicit segment count (still clamp to avoid drawing insanely tessellated shapes)
num_segments = ImClamp(num_segments, 3, IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_MAX);
// Because we are filling a closed shape we remove 1 from the count of segments/points
const float a_max = (IM_PI * 2.0f) * ((float)num_segments - 1.0f) / (float)num_segments;
PathArcTo(center, radius, 0.0f, a_max, num_segments - 1);
}
PathFillConvex(col);
}
// Guaranteed to honor 'num_segments'
void ImDrawList::AddNgon(const ImVec2& center, float radius, ImU32 col, int num_segments, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0 || (num_segments <= 2) || (radius <= 0.0f))
return;
// Because we are filling a closed shape we remove 1 from the count of segments/points
const float a_max = (IM_PI * 2.0f) * ((float)num_segments - 1.0f) / (float)num_segments;
PathArcTo(center, radius - 0.5f, 0.0f, a_max, num_segments - 1);
PathStroke(col, ImDrawFlags_Closed, thickness);
}
// Guaranteed to honor 'num_segments'
void ImDrawList::AddNgonFilled(const ImVec2& center, float radius, ImU32 col, int num_segments)
{
if ((col & IM_COL32_A_MASK) == 0 || (num_segments <= 2) || (radius <= 0.0f))
return;
// Because we are filling a closed shape we remove 1 from the count of segments/points
const float a_max = (IM_PI * 2.0f) * ((float)num_segments - 1.0f) / (float)num_segments;
PathArcTo(center, radius, 0.0f, a_max, num_segments - 1);
PathFillConvex(col);
}
// Ellipse
void ImDrawList::AddEllipse(const ImVec2& center, float radius_x, float radius_y, ImU32 col, float rot, int num_segments, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
if (num_segments <= 0)
num_segments = _CalcCircleAutoSegmentCount(ImMax(radius_x, radius_y)); // A bit pessimistic, maybe there's a better computation to do here.
// Because we are filling a closed shape we remove 1 from the count of segments/points
const float a_max = IM_PI * 2.0f * ((float)num_segments - 1.0f) / (float)num_segments;
PathEllipticalArcTo(center, radius_x, radius_y, rot, 0.0f, a_max, num_segments - 1);
PathStroke(col, true, thickness);
}
void ImDrawList::AddEllipseFilled(const ImVec2& center, float radius_x, float radius_y, ImU32 col, float rot, int num_segments)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
if (num_segments <= 0)
num_segments = _CalcCircleAutoSegmentCount(ImMax(radius_x, radius_y)); // A bit pessimistic, maybe there's a better computation to do here.
// Because we are filling a closed shape we remove 1 from the count of segments/points
const float a_max = IM_PI * 2.0f * ((float)num_segments - 1.0f) / (float)num_segments;
PathEllipticalArcTo(center, radius_x, radius_y, rot, 0.0f, a_max, num_segments - 1);
PathFillConvex(col);
}
// Cubic Bezier takes 4 controls points
void ImDrawList::AddBezierCubic(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const ImVec2& p4, ImU32 col, float thickness, int num_segments)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(p1);
PathBezierCubicCurveTo(p2, p3, p4, num_segments);
PathStroke(col, 0, thickness);
}
// Quadratic Bezier takes 3 controls points
void ImDrawList::AddBezierQuadratic(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, ImU32 col, float thickness, int num_segments)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(p1);
PathBezierQuadraticCurveTo(p2, p3, num_segments);
PathStroke(col, 0, thickness);
}
void ImDrawList::AddText(const ImFont* font, float font_size, const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end, float wrap_width, const ImVec4* cpu_fine_clip_rect)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
if (text_end == NULL)
text_end = text_begin + strlen(text_begin);
if (text_begin == text_end)
return;
// Pull default font/size from the shared ImDrawListSharedData instance
if (font == NULL)
font = _Data->Font