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skia / external / github.com / ocornut / imgui / refs/heads/features/tex_antialiased_lines / . / imgui_draw.cpp
blob: 3150399c8f2009f63dde19b41c3d1198d955fdf0 [file] [log] [blame] [edit]
// dear imgui, v1.78 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
#include "imgui.h"
#ifndef IMGUI_DISABLE
#ifndef IMGUI_DEFINE_MATH_OPERATORS
#define IMGUI_DEFINE_MATH_OPERATORS
#endif
#include "imgui_internal.h"
#include <stdio.h> // vsnprintf, sscanf, printf
#if !defined(alloca)
#if defined(__GLIBC__) || defined(__sun) || defined(__APPLE__) || defined(__NEWLIB__)
#include <alloca.h> // alloca (glibc uses <alloca.h>. Note that Cygwin may have _WIN32 defined, so the order matters here)
#elif defined(_WIN32)
#include <malloc.h> // alloca
#if !defined(alloca)
#define alloca _alloca // for clang with MS Codegen
#endif
#else
#include <stdlib.h> // alloca
#endif
#endif
// 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
#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
#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
//-------------------------------------------------------------------------
// 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
#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
#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
#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
#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)ImFloorStd(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
#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, 0.25f);
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_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, 0.70f);
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, 0.16f);
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_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(0.80f, 0.80f, 0.80f, 0.56f);
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_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);
}
//-----------------------------------------------------------------------------
// ImDrawList
//-----------------------------------------------------------------------------
ImDrawListSharedData::ImDrawListSharedData()
{
Font = NULL;
FontSize = 0.0f;
CurveTessellationTol = 0.0f;
CircleSegmentMaxError = 0.0f;
ClipRectFullscreen = ImVec4(-8192.0f, -8192.0f, +8192.0f, +8192.0f);
InitialFlags = ImDrawListFlags_None;
// Lookup tables
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));
}
memset(CircleSegmentCounts, 0, sizeof(CircleSegmentCounts)); // This will be set by SetCircleSegmentMaxError()
TexUvLines = NULL;
}
void ImDrawListSharedData::SetCircleSegmentMaxError(float max_error)
{
if (CircleSegmentMaxError == max_error)
return;
CircleSegmentMaxError = max_error;
for (int i = 0; i < IM_ARRAYSIZE(CircleSegmentCounts); i++)
{
const float radius = i + 1.0f;
const int segment_count = IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC(radius, CircleSegmentMaxError);
CircleSegmentCounts[i] = (ImU8)ImMin(segment_count, 255);
}
}
// 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.
// (those should be IM_STATIC_ASSERT() in theory but with our pre C++11 setup the whole check doesn't compile with GCC)
IM_ASSERT(IM_OFFSETOF(ImDrawCmd, ClipRect) == 0);
IM_ASSERT(IM_OFFSETOF(ImDrawCmd, TextureId) == sizeof(ImVec4));
IM_ASSERT(IM_OFFSETOF(ImDrawCmd, VtxOffset) == sizeof(ImVec4) + sizeof(ImTextureID));
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());
}
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()
{
if (CmdBuffer.Size == 0)
return;
ImDrawCmd* curr_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
if (curr_cmd->ElemCount == 0 && curr_cmd->UserCallback == NULL)
CmdBuffer.pop_back();
}
void ImDrawList::AddCallback(ImDrawCallback callback, void* callback_data)
{
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
// 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
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 && 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
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 && 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;
ImDrawCmd* curr_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
IM_ASSERT(curr_cmd->VtxOffset != _CmdHeader.VtxOffset);
if (curr_cmd->ElemCount != 0)
{
AddDrawCmd();
return;
}
IM_ASSERT(curr_cmd->UserCallback == NULL);
curr_cmd->VtxOffset = _CmdHeader.VtxOffset;
}
// 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(ImVec2 cr_min, 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))
{
_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.
#define IM_NORMALIZE2F_OVER_ZERO(VX,VY) do { float d2 = VX*VX + VY*VY; if (d2 > 0.0f) { float inv_len = 1.0f / ImSqrt(d2); VX *= inv_len; VY *= inv_len; } } while (0)
#define IM_FIXNORMAL2F(VX,VY) do { float d2 = VX*VX + VY*VY; if (d2 < 0.5f) d2 = 0.5f; float inv_lensq = 1.0f / d2; VX *= inv_lensq; VY *= inv_lensq; } while (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, bool closed, float thickness)
{
if (points_count < 2)
return;
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 > 1.0f);
if (Flags & ImDrawListFlags_AntiAliasedLines)
{
// Anti-aliased stroke
const float AA_SIZE = 1.0f;
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) && (fractional_thickness <= 0.00001f)
&& (AA_SIZE == 1.0f);
// We should never hit this, because NewFrame() doesn't set ImDrawListFlags_AntiAliasedLinesUseTex unless ImFontAtlasFlags_NoLines is off
IM_ASSERT_PARANOID((!use_texture) || (!(_Data->Font->ContainerAtlas->Flags & ImFontAtlasFlags_NoLines)));
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
ImVec2* temp_normals = (ImVec2*)alloca(points_count * ((use_texture || !thick_line) ? 3 : 5) * sizeof(ImVec2)); //-V630
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
// We don't use AA_SIZE here because the +1 is tied to the generated texture and so alternate values won't work without changes to that code
// If AA_SIZE != 1.0f we cannot use the use_texture path.
const float half_draw_size = use_texture ? ((thickness * 0.5f) + 1) : 1.0f;
// 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)
{
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.
void ImDrawList::AddConvexPolyFilled(const ImVec2* points, const int points_count, ImU32 col)
{
if (points_count < 3)
return;
const ImVec2 uv = _Data->TexUvWhitePixel;
if (Flags & ImDrawListFlags_AntiAliasedFill)
{
// Anti-aliased Fill
const float AA_SIZE = 1.0f;
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
ImVec2* temp_normals = (ImVec2*)alloca(points_count * sizeof(ImVec2)); //-V630
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::PathArcToFast(const ImVec2& center, float radius, int a_min_of_12, int a_max_of_12)
{
if (radius == 0.0f || a_min_of_12 > a_max_of_12)
{
_Path.push_back(center);
return;
}
// For legacy reason the PathArcToFast() always takes angles where 2*PI is represented by 12,
// but it is possible to set IM_DRAWLIST_ARCFAST_TESSELATION_MULTIPLIER to a higher value. This should compile to a no-op otherwise.
#if IM_DRAWLIST_ARCFAST_TESSELLATION_MULTIPLIER != 1
a_min_of_12 *= IM_DRAWLIST_ARCFAST_TESSELLATION_MULTIPLIER;
a_max_of_12 *= IM_DRAWLIST_ARCFAST_TESSELLATION_MULTIPLIER;
#endif
_Path.reserve(_Path.Size + (a_max_of_12 - a_min_of_12 + 1));
for (int a = a_min_of_12; a <= a_max_of_12; a++)
{
const ImVec2& c = _Data->ArcFastVtx[a % IM_ARRAYSIZE(_Data->ArcFastVtx)];
_Path.push_back(ImVec2(center.x + c.x * radius, center.y + c.y * radius));
}
}
void ImDrawList::PathArcTo(const ImVec2& center, float radius, float a_min, float a_max, int num_segments)
{
if (radius == 0.0f)
{
_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));
}
}
ImVec2 ImBezierCalc(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);
}
// Closely mimics BezierClosestPointCasteljauStep() in imgui.cpp
static void PathBezierToCasteljau(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;
PathBezierToCasteljau(path, x1, y1, x12, y12, x123, y123, x1234, y1234, tess_tol, level + 1);
PathBezierToCasteljau(path, x1234, y1234, x234, y234, x34, y34, x4, y4, tess_tol, level + 1);
}
}
void ImDrawList::PathBezierCurveTo(const ImVec2& p2, const ImVec2& p3, const ImVec2& p4, int num_segments)
{
ImVec2 p1 = _Path.back();
if (num_segments == 0)
{
PathBezierToCasteljau(&_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(ImBezierCalc(p1, p2, p3, p4, t_step * i_step));
}
}
void ImDrawList::PathRect(const ImVec2& a, const ImVec2& b, float rounding, ImDrawCornerFlags rounding_corners)
{
rounding = ImMin(rounding, ImFabs(b.x - a.x) * ( ((rounding_corners & ImDrawCornerFlags_Top) == ImDrawCornerFlags_Top) || ((rounding_corners & ImDrawCornerFlags_Bot) == ImDrawCornerFlags_Bot) ? 0.5f : 1.0f ) - 1.0f);
rounding = ImMin(rounding, ImFabs(b.y - a.y) * ( ((rounding_corners & ImDrawCornerFlags_Left) == ImDrawCornerFlags_Left) || ((rounding_corners & ImDrawCornerFlags_Right) == ImDrawCornerFlags_Right) ? 0.5f : 1.0f ) - 1.0f);
if (rounding <= 0.0f || rounding_corners == 0)
{
PathLineTo(a);
PathLineTo(ImVec2(b.x, a.y));
PathLineTo(b);
PathLineTo(ImVec2(a.x, b.y));
}
else
{
const float rounding_tl = (rounding_corners & ImDrawCornerFlags_TopLeft) ? rounding : 0.0f;
const float rounding_tr = (rounding_corners & ImDrawCornerFlags_TopRight) ? rounding : 0.0f;
const float rounding_br = (rounding_corners & ImDrawCornerFlags_BotRight) ? rounding : 0.0f;
const float rounding_bl = (rounding_corners & ImDrawCornerFlags_BotLeft) ? 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, false, thickness);
}
// 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, ImDrawCornerFlags rounding_corners, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
if (Flags & ImDrawListFlags_AntiAliasedLines)
PathRect(p_min + ImVec2(0.50f, 0.50f), p_max - ImVec2(0.50f, 0.50f), rounding, rounding_corners);
else
PathRect(p_min + ImVec2(0.50f, 0.50f), p_max - ImVec2(0.49f, 0.49f), rounding, rounding_corners); // Better looking lower-right corner and rounded non-AA shapes.
PathStroke(col, true, thickness);
}
void ImDrawList::AddRectFilled(const ImVec2& p_min, const ImVec2& p_max, ImU32 col, float rounding, ImDrawCornerFlags rounding_corners)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
if (rounding > 0.0f)
{
PathRect(p_min, p_max, rounding, rounding_corners);
PathFillConvex(col);
}
else
{
PrimReserve(6, 4);
PrimRect(p_min, p_max, 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, true, 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, true, 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);
}
void ImDrawList::AddCircle(const ImVec2& center, float radius, ImU32 col, int num_segments, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0 || radius <= 0.0f)
return;
// Obtain segment count
if (num_segments <= 0)
{
// Automatic segment count
const int radius_idx = (int)radius - 1;
if (radius_idx < IM_ARRAYSIZE(_Data->CircleSegmentCounts))
num_segments = _Data->CircleSegmentCounts[radius_idx]; // Use cached value
else
num_segments = IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC(radius, _Data->CircleSegmentMaxError);
}
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;
if (num_segments == 12)
PathArcToFast(center, radius - 0.5f, 0, 12);
else
PathArcTo(center, radius - 0.5f, 0.0f, a_max, num_segments - 1);
PathStroke(col, true, thickness);
}
void ImDrawList::AddCircleFilled(const ImVec2& center, float radius, ImU32 col, int num_segments)
{
if ((col & IM_COL32_A_MASK) == 0 || radius <= 0.0f)
return;
// Obtain segment count
if (num_segments <= 0)
{
// Automatic segment count
const int radius_idx = (int)radius - 1;
if (radius_idx < IM_ARRAYSIZE(_Data->CircleSegmentCounts))
num_segments = _Data->CircleSegmentCounts[radius_idx]; // Use cached value
else
num_segments = IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC(radius, _Data->CircleSegmentMaxError);
}
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;
if (num_segments == 12)
PathArcToFast(center, radius, 0, 12);
else
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)
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, true, 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)
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);
}
// Cubic Bezier takes 4 controls points
void ImDrawList::AddBezierCurve(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);
PathBezierCurveTo(p2, p3, p4, num_segments);
PathStroke(col, false, 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;
if (font_size == 0.0f)
font_size = _Data->FontSize;
IM_ASSERT(font->ContainerAtlas->TexID == _CmdHeader.TextureId); // Use high-level ImGui::PushFont() or low-level ImDrawList::PushTextureId() to change font.
ImVec4 clip_rect = _CmdHeader.ClipRect;
if (cpu_fine_clip_rect)
{
clip_rect.x = ImMax(clip_rect.x, cpu_fine_clip_rect->x);
clip_rect.y = ImMax(clip_rect.y, cpu_fine_clip_rect->y);
clip_rect.z = ImMin(clip_rect.z, cpu_fine_clip_rect->z);
clip_rect.w = ImMin(clip_rect.w, cpu_fine_clip_rect->w);
}
font->RenderText(this, font_size, pos, col, clip_rect, text_begin, text_end, wrap_width, cpu_fine_clip_rect != NULL);
}
void ImDrawList::AddText(const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end)
{
AddText(NULL, 0.0f, pos, col, text_begin, text_end);
}
void ImDrawList::AddImage(ImTextureID user_texture_id, const ImVec2& p_min, const ImVec2& p_max, const ImVec2& uv_min, const ImVec2& uv_max, ImU32 col)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
const bool push_texture_id = user_texture_id != _CmdHeader.TextureId;
if (push_texture_id)
PushTextureID(user_texture_id);
PrimReserve(6, 4);
PrimRectUV(p_min, p_max, uv_min, uv_max, col);
if (push_texture_id)
PopTextureID();
}
void ImDrawList::AddImageQuad(ImTextureID user_texture_id, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const ImVec2& p4, const ImVec2& uv1, const ImVec2& uv2, const ImVec2& uv3, const ImVec2& uv4, ImU32 col)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
const bool push_texture_id = user_texture_id != _CmdHeader.TextureId;
if (push_texture_id)
PushTextureID(user_texture_id);
PrimReserve(6, 4);
PrimQuadUV(p1, p2, p3, p4, uv1, uv2, uv3, uv4, col);
if (push_texture_id)
PopTextureID();
}
void ImDrawList::AddImageRounded(ImTextureID user_texture_id, const ImVec2& p_min, const ImVec2& p_max, const ImVec2& uv_min, const ImVec2& uv_max, ImU32 col, float rounding, ImDrawCornerFlags rounding_corners)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
if (rounding <= 0.0f || (rounding_corners & ImDrawCornerFlags_All) == 0)
{
AddImage(user_texture_id, p_min, p_max, uv_min, uv_max, col);
return;
}
const bool push_texture_id = _TextureIdStack.empty() || user_texture_id != _TextureIdStack.back();
if (push_texture_id)
PushTextureID(user_texture_id);
int vert_start_idx = VtxBuffer.Size;
PathRect(p_min, p_max, rounding, rounding_corners);
PathFillConvex(col);
int vert_end_idx = VtxBuffer.Size;
ImGui::ShadeVertsLinearUV(this, vert_start_idx, vert_end_idx, p_min, p_max, uv_min, uv_max, true);
if (push_texture_id)
PopTextureID();
}
//-----------------------------------------------------------------------------
// ImDrawListSplitter
//-----------------------------------------------------------------------------
// FIXME: This may be a little confusing, trying to be a little too low-level/optimal instead of just doing vector swap..
//-----------------------------------------------------------------------------
void ImDrawListSplitter::ClearFreeMemory()
{
for (int i = 0; i < _Channels.Size; i++)
{
if (i == _Current)
memset(&_Channels[i], 0, sizeof(_Channels[i])); // Current channel is a copy of CmdBuffer/IdxBuffer, don't destruct again
_Channels[i]._CmdBuffer.clear();
_Channels[i]._IdxBuffer.clear();
}
_Current = 0;
_Count = 1;
_Channels.clear();
}
void ImDrawListSplitter::Split(ImDrawList* draw_list, int channels_count)
{
IM_ASSERT(_Current == 0 && _Count <= 1 && "Nested channel splitting is not supported. Please use separate instances of ImDrawListSplitter.");
int old_channels_count = _Channels.Size;
if (old_channels_count < channels_count)
_Channels.resize(channels_count);
_Count = channels_count;
// Channels[] (24/32 bytes each) hold storage that we'll swap with draw_list->_CmdBuffer/_IdxBuffer
// The content of Channels[0] at this point doesn't matter. We clear it to make state tidy in a debugger but we don't strictly need to.
// When we switch to the next channel, we'll copy draw_list->_CmdBuffer/_IdxBuffer into Channels[0] and then Channels[1] into draw_list->CmdBuffer/_IdxBuffer
memset(&_Channels[0], 0, sizeof(ImDrawChannel));
for (int i = 1; i < channels_count; i++)
{
if (i >= old_channels_count)
{
IM_PLACEMENT_NEW(&_Channels[i]) ImDrawChannel();
}
else
{
_Channels[i]._CmdBuffer.resize(0);
_Channels[i]._IdxBuffer.resize(0);
}
if (_Channels[i]._CmdBuffer.Size == 0)
{
ImDrawCmd draw_cmd;
ImDrawCmd_HeaderCopy(&draw_cmd, &draw_list->_CmdHeader); // Copy ClipRect, TextureId, VtxOffset
_Channels[i]._CmdBuffer.push_back(draw_cmd);
}
}
}
void ImDrawListSplitter::Merge(ImDrawList* draw_list)
{
// Note that we never use or rely on _Channels.Size because it is merely a buffer that we never shrink back to 0 to keep all sub-buffers ready for use.
if (_Count <= 1)
return;
SetCurrentChannel(draw_list, 0);
draw_list->_PopUnusedDrawCmd();
// Calculate our final buffer sizes. Also fix the incorrect IdxOffset values in each command.
int new_cmd_buffer_count = 0;
int new_idx_buffer_count = 0;
ImDrawCmd* last_cmd = (_Count > 0 && draw_list->CmdBuffer.Size > 0) ? &draw_list->CmdBuffer.back() : NULL;
int idx_offset = last_cmd ? last_cmd->IdxOffset + last_cmd->ElemCount : 0;
for (int i = 1; i < _Count; i++)
{
ImDrawChannel& ch = _Channels[i];
// Equivalent of PopUnusedDrawCmd() for this channel's cmdbuffer and except we don't need to test for UserCallback.
if (ch._CmdBuffer.Size > 0 && ch._CmdBuffer.back().ElemCount == 0)
ch._CmdBuffer.pop_back();
if (ch._CmdBuffer.Size > 0 && last_cmd != NULL)
{
ImDrawCmd* next_cmd = &ch._CmdBuffer[0];
if (ImDrawCmd_HeaderCompare(last_cmd, next_cmd) == 0 && last_cmd->UserCallback == NULL && next_cmd->UserCallback == NULL)
{
// Merge previous channel last draw command with current channel first draw command if matching.
last_cmd->ElemCount += next_cmd->ElemCount;
idx_offset += next_cmd->ElemCount;
ch._CmdBuffer.erase(ch._CmdBuffer.Data); // FIXME-OPT: Improve for multiple merges.
}
}
if (ch._CmdBuffer.Size > 0)
last_cmd = &ch._CmdBuffer.back();
new_cmd_buffer_count += ch._CmdBuffer.Size;
new_idx_buffer_count += ch._IdxBuffer.Size;
for (int cmd_n = 0; cmd_n < ch._CmdBuffer.Size; cmd_n++)
{
ch._CmdBuffer.Data[cmd_n].IdxOffset = idx_offset;
idx_offset += ch._CmdBuffer.Data[cmd_n].ElemCount;
}
}
draw_list->CmdBuffer.resize(draw_list->CmdBuffer.Size + new_cmd_buffer_count);
draw_list->IdxBuffer.resize(draw_list->IdxBuffer.Size + new_idx_buffer_count);
// Write commands and indices in order (they are fairly small structures, we don't copy vertices only indices)
ImDrawCmd* cmd_write = draw_list->CmdBuffer.Data + draw_list->CmdBuffer.Size - new_cmd_buffer_count;
ImDrawIdx* idx_write = draw_list->IdxBuffer.Data + draw_list->IdxBuffer.Size - new_idx_buffer_count;
for (int i = 1; i < _Count; i++)
{
ImDrawChannel& ch = _Channels[i];
if (int sz = ch._CmdBuffer.Size) { memcpy(cmd_write, ch._CmdBuffer.Data, sz * sizeof(ImDrawCmd)); cmd_write += sz; }
if (int sz = ch._IdxBuffer.Size) { memcpy(idx_write, ch._IdxBuffer.Data, sz * sizeof(ImDrawIdx)); idx_write += sz; }
}
draw_list->_IdxWritePtr = idx_write;
// Ensure there's always a non-callback draw command trailing the command-buffer
if (draw_list->CmdBuffer.Size == 0 || draw_list->CmdBuffer.back().UserCallback != NULL)
draw_list->AddDrawCmd();
// If current command is used with different settings we need to add a new command
ImDrawCmd* curr_cmd = &draw_list->CmdBuffer.Data[draw_list->CmdBuffer.Size - 1];
if (curr_cmd->ElemCount == 0)
ImDrawCmd_HeaderCopy(curr_cmd, &draw_list->_CmdHeader); // Copy ClipRect, TextureId, VtxOffset
else if (ImDrawCmd_HeaderCompare(curr_cmd, &draw_list->_CmdHeader) != 0)
draw_list->AddDrawCmd();
_Count = 1;
}
void ImDrawListSplitter::SetCurrentChannel(ImDrawList* draw_list, int idx)
{
IM_ASSERT(idx >= 0 && idx < _Count);
if (_Current == idx)
return;
// Overwrite ImVector (12/16 bytes), four times. This is merely a silly optimization instead of doing .swap()
memcpy(&_Channels.Data[_Current]._CmdBuffer, &draw_list->CmdBuffer, sizeof(draw_list->CmdBuffer));
memcpy(&_Channels.Data[_Current]._IdxBuffer, &draw_list->IdxBuffer, sizeof(draw_list->IdxBuffer));
_Current = idx;
memcpy(&draw_list->CmdBuffer, &_Channels.Data[idx]._CmdBuffer, sizeof(draw_list->CmdBuffer));
memcpy(&draw_list->IdxBuffer, &_Channels.Data[idx]._IdxBuffer, sizeof(draw_list->IdxBuffer));
draw_list->_IdxWritePtr = draw_list->IdxBuffer.Data + draw_list->IdxBuffer.Size;
// If current command is used with different settings we need to add a new command
ImDrawCmd* curr_cmd = &draw_list->CmdBuffer.Data[draw_list->CmdBuffer.Size - 1];
if (curr_cmd->ElemCount == 0)
ImDrawCmd_HeaderCopy(curr_cmd, &draw_list->_CmdHeader); // Copy ClipRect, TextureId, VtxOffset
else if (ImDrawCmd_HeaderCompare(curr_cmd, &draw_list->_CmdHeader) != 0)
draw_list->AddDrawCmd();
}
//-----------------------------------------------------------------------------
// [SECTION] ImDrawData
//-----------------------------------------------------------------------------
// For backward compatibility: convert all buffers from indexed to de-indexed, in case you cannot render indexed. Note: this is slow and most likely a waste of resources. Always prefer indexed rendering!
void ImDrawData::DeIndexAllBuffers()
{
ImVector<ImDrawVert> new_vtx_buffer;
TotalVtxCount = TotalIdxCount = 0;
for (int i = 0; i < CmdListsCount; i++)
{
ImDrawList* cmd_list = CmdLists[i];
if (cmd_list->IdxBuffer.empty())
continue;
new_vtx_buffer.resize(cmd_list->IdxBuffer.Size);
for (int j = 0; j < cmd_list->IdxBuffer.Size; j++)
new_vtx_buffer[j] = cmd_list->VtxBuffer[cmd_list->IdxBuffer[j]];
cmd_list->VtxBuffer.swap(new_vtx_buffer);
cmd_list->IdxBuffer.resize(0);
TotalVtxCount += cmd_list->VtxBuffer.Size;
}
}
// Helper to scale the ClipRect field of each ImDrawCmd.
// Use if your final output buffer is at a different scale than draw_data->DisplaySize,
// or if there is a difference between your window resolution and framebuffer resolution.
void ImDrawData::ScaleClipRects(const ImVec2& fb_scale)
{
for (int i = 0; i < CmdListsCount; i++)
{
ImDrawList* cmd_list = CmdLists[i];
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
{
ImDrawCmd* cmd = &cmd_list->CmdBuffer[cmd_i];
cmd->ClipRect = ImVec4(cmd->ClipRect.x * fb_scale.x, cmd->ClipRect.y * fb_scale.y, cmd->ClipRect.z * fb_scale.x, cmd->ClipRect.w * fb_scale.y);
}
}
}
//-----------------------------------------------------------------------------
// [SECTION] Helpers ShadeVertsXXX functions
//-----------------------------------------------------------------------------
// Generic linear color gradient, write to RGB fields, leave A untouched.
void ImGui::ShadeVertsLinearColorGradientKeepAlpha(ImDrawList* draw_list, int vert_start_idx, int vert_end_idx, ImVec2 gradient_p0, ImVec2 gradient_p1, ImU32 col0, ImU32 col1)
{
ImVec2 gradient_extent = gradient_p1 - gradient_p0;
float gradient_inv_length2 = 1.0f / ImLengthSqr(gradient_extent);
ImDrawVert* vert_start = draw_list->VtxBuffer.Data + vert_start_idx;
ImDrawVert* vert_end = draw_list->VtxBuffer.Data + vert_end_idx;
for (ImDrawVert* vert = vert_start; vert < vert_end; vert++)
{
float d = ImDot(vert->pos - gradient_p0, gradient_extent);
float t = ImClamp(d * gradient_inv_length2, 0.0f, 1.0f);
int r = ImLerp((int)(col0 >> IM_COL32_R_SHIFT) & 0xFF, (int)(col1 >> IM_COL32_R_SHIFT) & 0xFF, t);
int g = ImLerp((int)(col0 >> IM_COL32_G_SHIFT) & 0xFF, (int)(col1 >> IM_COL32_G_SHIFT) & 0xFF, t);
int b = ImLerp((int)(col0 >> IM_COL32_B_SHIFT) & 0xFF, (int)(col1 >> IM_COL32_B_SHIFT) & 0xFF, t);
vert->col = (r << IM_COL32_R_SHIFT) | (g << IM_COL32_G_SHIFT) | (b << IM_COL32_B_SHIFT) | (vert->col & IM_COL32_A_MASK);
}
}
// Distribute UV over (a, b) rectangle
void ImGui::ShadeVertsLinearUV(ImDrawList* draw_list, int vert_start_idx, int vert_end_idx, const ImVec2& a, const ImVec2& b, const ImVec2& uv_a, const ImVec2& uv_b, bool clamp)
{
const ImVec2 size = b - a;
const ImVec2 uv_size = uv_b - uv_a;
const ImVec2 scale = ImVec2(
size.x != 0.0f ? (uv_size.x / size.x) : 0.0f,
size.y != 0.0f ? (uv_size.y / size.y) : 0.0f);
ImDrawVert* vert_start = draw_list->VtxBuffer.Data + vert_start_idx;
ImDrawVert* vert_end = draw_list->VtxBuffer.Data + vert_end_idx;
if (clamp)
{
const ImVec2 min = ImMin(uv_a, uv_b);
const ImVec2 max = ImMax(uv_a, uv_b);
for (ImDrawVert* vertex = vert_start; vertex < vert_end; ++vertex)
vertex->uv = ImClamp(uv_a + ImMul(ImVec2(vertex->pos.x, vertex->pos.y) - a, scale), min, max);
}
else
{
for (ImDrawVert* vertex = vert_start; vertex < vert_end; ++vertex)
vertex->uv = uv_a + ImMul(ImVec2(vertex->pos.x, vertex->pos.y) - a, scale);
}
}
//-----------------------------------------------------------------------------
// [SECTION] ImFontConfig
//-----------------------------------------------------------------------------
ImFontConfig::ImFontConfig()
{
FontData = NULL;
FontDataSize = 0;
FontDataOwnedByAtlas = true;
FontNo = 0;
SizePixels = 0.0f;
OversampleH = 3; // FIXME: 2 may be a better default?
OversampleV = 1;
PixelSnapH = false;
GlyphExtraSpacing = ImVec2(0.0f, 0.0f);
GlyphOffset = ImVec2(0.0f, 0.0f);
GlyphRanges = NULL;
GlyphMinAdvanceX = 0.0f;
GlyphMaxAdvanceX = FLT_MAX;
MergeMode = false;
RasterizerFlags = 0x00;
RasterizerMultiply = 1.0f;
EllipsisChar = (ImWchar)-1;
memset(Name, 0, sizeof(Name));
DstFont = NULL;
}
//-----------------------------------------------------------------------------
// [SECTION] ImFontAtlas
//-----------------------------------------------------------------------------
// A work of art lies ahead! (. = white layer, X = black layer, others are blank)
// The white texels on the top left are the ones we'll use everywhere in Dear ImGui to render filled shapes.
const int FONT_ATLAS_DEFAULT_TEX_DATA_W_HALF = 108;
const int FONT_ATLAS_DEFAULT_TEX_DATA_H = 27;
static const char FONT_ATLAS_DEFAULT_TEX_DATA_PIXELS[FONT_ATLAS_DEFAULT_TEX_DATA_W_HALF * FONT_ATLAS_DEFAULT_TEX_DATA_H + 1] =
{
"..- -XXXXXXX- X - X -XXXXXXX - XXXXXXX- XX "
"..- -X.....X- X.X - X.X -X.....X - X.....X- X..X "
"--- -XXX.XXX- X...X - X...X -X....X - X....X- X..X "
"X - X.X - X.....X - X.....X -X...X - X...X- X..X "
"XX - X.X -X.......X- X.......X -X..X.X - X.X..X- X..X "
"X.X - X.X -XXXX.XXXX- XXXX.XXXX -X.X X.X - X.X X.X- X..XXX "
"X..X - X.X - X.X - X.X -XX X.X - X.X XX- X..X..XXX "
"X...X - X.X - X.X - XX X.X XX - X.X - X.X - X..X..X..XX "
"X....X - X.X - X.X - X.X X.X X.X - X.X - X.X - X..X..X..X.X "
"X.....X - X.X - X.X - X..X X.X X..X - X.X - X.X -XXX X..X..X..X..X"
"X......X - X.X - X.X - X...XXXXXX.XXXXXX...X - X.X XX-XX X.X -X..XX........X..X"
"X.......X - X.X - X.X -X.....................X- X.X X.X-X.X X.X -X...X...........X"
"X........X - X.X - X.X - X...XXXXXX.XXXXXX...X - X.X..X-X..X.X - X..............X"
"X.........X -XXX.XXX- X.X - X..X X.X X..X - X...X-X...X - X.............X"
"X..........X-X.....X- X.X - X.X X.X X.X - X....X-X....X - X.............X"
"X......XXXXX-XXXXXXX- X.X - XX X.X XX - X.....X-X.....X - X............X"
"X...X..X --------- X.X - X.X - XXXXXXX-XXXXXXX - X...........X "
"X..X X..X - -XXXX.XXXX- XXXX.XXXX ------------------------------------- X..........X "
"X.X X..X - -X.......X- X.......X - XX XX - - X..........X "
"XX X..X - - X.....X - X.....X - X.X X.X - - X........X "
" X..X - X...X - X...X - X..X X..X - - X........X "
" XX - X.X - X.X - X...XXXXXXXXXXXXX...X - - XXXXXXXXXX "
"------------ - X - X -X.....................X- ------------------"
" ----------------------------------- X...XXXXXXXXXXXXX...X - "
" - X..X X..X - "
" - X.X X.X - "
" - XX XX - "
};
static const ImVec2 FONT_ATLAS_DEFAULT_TEX_CURSOR_DATA[ImGuiMouseCursor_COUNT][3] =
{
// Pos ........ Size ......... Offset ......
{ ImVec2( 0,3), ImVec2(12,19), ImVec2( 0, 0) }, // ImGuiMouseCursor_Arrow
{ ImVec2(13,0), ImVec2( 7,16), ImVec2( 1, 8) }, // ImGuiMouseCursor_TextInput
{ ImVec2(31,0), ImVec2(23,23), ImVec2(11,11) }, // ImGuiMouseCursor_ResizeAll
{ ImVec2(21,0), ImVec2( 9,23), ImVec2( 4,11) }, // ImGuiMouseCursor_ResizeNS
{ ImVec2(55,18),ImVec2(23, 9), ImVec2(11, 4) }, // ImGuiMouseCursor_ResizeEW
{ ImVec2(73,0), ImVec2(17,17), ImVec2( 8, 8) }, // ImGuiMouseCursor_ResizeNESW
{ ImVec2(55,0), ImVec2(17,17), ImVec2( 8, 8) }, // ImGuiMouseCursor_ResizeNWSE
{ ImVec2(91,0), ImVec2(17,22), ImVec2( 5, 0) }, // ImGuiMouseCursor_Hand
};
ImFontAtlas::ImFontAtlas()
{
Locked = false;
Flags = ImFontAtlasFlags_None;
TexID = (ImTextureID)NULL;
TexDesiredWidth = 0;
TexGlyphPadding = 1;
TexPixelsAlpha8 = NULL;
TexPixelsRGBA32 = NULL;
TexWidth = TexHeight = 0;
TexUvScale = ImVec2(0.0f, 0.0f);
TexUvWhitePixel = ImVec2(0.0f, 0.0f);
PackIdMouseCursors = PackIdLines = -1;
}
ImFontAtlas::~ImFontAtlas()
{
IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas between NewFrame() and EndFrame/Render()!");
Clear();
}
void ImFontAtlas::ClearInputData()
{
IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas between NewFrame() and EndFrame/Render()!");
for (int i = 0; i < ConfigData.Size; i++)
if (ConfigData[i].FontData && ConfigData[i].FontDataOwnedByAtlas)
{
IM_FREE(ConfigData[i].FontData);
ConfigData[i].FontData = NULL;
}
// When clearing this we lose access to the font name and other information used to build the font.
for (int i = 0; i < Fonts.Size; i++)
if (Fonts[i]->ConfigData >= ConfigData.Data && Fonts[i]->ConfigData < ConfigData.Data + ConfigData.Size)
{
Fonts[i]->ConfigData = NULL;
Fonts[i]->ConfigDataCount = 0;
}
ConfigData.clear();
CustomRects.clear();
PackIdMouseCursors = PackIdLines = -1;
}
void ImFontAtlas::ClearTexData()
{
IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas between NewFrame() and EndFrame/Render()!");
if (TexPixelsAlpha8)
IM_FREE(TexPixelsAlpha8);
if (TexPixelsRGBA32)
IM_FREE(TexPixelsRGBA32);
TexPixelsAlpha8 = NULL;
TexPixelsRGBA32 = NULL;
}
void ImFontAtlas::ClearFonts()
{
IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas between NewFrame() and EndFrame/Render()!");
for (int i = 0; i < Fonts.Size; i++)
IM_DELETE(Fonts[i]);
Fonts.clear();
}
void ImFontAtlas::Clear()
{
ClearInputData();
ClearTexData();
ClearFonts();
}
void ImFontAtlas::GetTexDataAsAlpha8(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel)
{
// Build atlas on demand
if (TexPixelsAlpha8 == NULL)
{
if (ConfigData.empty())
AddFontDefault();
Build();
}
*out_pixels = TexPixelsAlpha8;
if (out_width) *out_width = TexWidth;
if (out_height) *out_height = TexHeight;
if (out_bytes_per_pixel) *out_bytes_per_pixel = 1;
}
void ImFontAtlas::GetTexDataAsRGBA32(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel)
{
// Convert to RGBA32 format on demand
// Although it is likely to be the most commonly used format, our font rendering is 1 channel / 8 bpp
if (!TexPixelsRGBA32)
{
unsigned char* pixels = NULL;
GetTexDataAsAlpha8(&pixels, NULL, NULL);
if (pixels)
{
TexPixelsRGBA32 = (unsigned int*)IM_ALLOC((size_t)TexWidth * (size_t)TexHeight * 4);
const unsigned char* src = pixels;
unsigned int* dst = TexPixelsRGBA32;
for (int n = TexWidth * TexHeight; n > 0; n--)
*dst++ = IM_COL32(255, 255, 255, (unsigned int)(*src++));
}
}
*out_pixels = (unsigned char*)TexPixelsRGBA32;
if (out_width) *out_width = TexWidth;
if (out_height) *out_height = TexHeight;
if (out_bytes_per_pixel) *out_bytes_per_pixel = 4;
}
ImFont* ImFontAtlas::AddFont(const ImFontConfig* font_cfg)
{
IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas between NewFrame() and EndFrame/Render()!");
IM_ASSERT(font_cfg->FontData != NULL && font_cfg->FontDataSize > 0);
IM_ASSERT(font_cfg->SizePixels > 0.0f);
// Create new font
if (!font_cfg->MergeMode)
Fonts.push_back(IM_NEW(ImFont));
else
IM_ASSERT(!Fonts.empty() && "Cannot use MergeMode for the first font"); // When using MergeMode make sure that a font has already been added before. You can use ImGui::GetIO().Fonts->AddFontDefault() to add the default imgui font.
ConfigData.push_back(*font_cfg);
ImFontConfig& new_font_cfg = ConfigData.back();
if (new_font_cfg.DstFont == NULL)
new_font_cfg.DstFont = Fonts.back();
if (!new_font_cfg.FontDataOwnedByAtlas)
{
new_font_cfg.FontData = IM_ALLOC(new_font_cfg.FontDataSize);
new_font_cfg.FontDataOwnedByAtlas = true;
memcpy(new_font_cfg.FontData, font_cfg->FontData, (size_t)new_font_cfg.FontDataSize);
}
if (new_font_cfg.DstFont->EllipsisChar == (ImWchar)-1)
new_font_cfg.DstFont->EllipsisChar = font_cfg->EllipsisChar;
// Invalidate texture
ClearTexData();
return new_font_cfg.DstFont;
}
// Default font TTF is compressed with stb_compress then base85 encoded (see misc/fonts/binary_to_compressed_c.cpp for encoder)
static unsigned int stb_decompress_length(const unsigned char* input);
static unsigned int stb_decompress(unsigned char* output, const unsigned char* input, unsigned int length);
static const char* GetDefaultCompressedFontDataTTFBase85();
static unsigned int Decode85Byte(char c) { return c >= '\\' ? c-36 : c-35; }
static void Decode85(const unsigned char* src, unsigned char* dst)
{
while (*src)
{
unsigned int tmp = Decode85Byte(src[0]) + 85 * (Decode85Byte(src[1]) + 85 * (Decode85Byte(src[2]) + 85 * (Decode85Byte(src[3]) + 85 * Decode85Byte(src[4]))));
dst[0] = ((tmp >> 0) & 0xFF); dst[1] = ((tmp >> 8) & 0xFF); dst[2] = ((tmp >> 16) & 0xFF); dst[3] = ((tmp >> 24) & 0xFF); // We can't assume little-endianness.
src += 5;
dst += 4;
}
}
// Load embedded ProggyClean.ttf at size 13, disable oversampling
ImFont* ImFontAtlas::AddFontDefault(const ImFontConfig* font_cfg_template)
{
ImFontConfig font_cfg = font_cfg_template ? *font_cfg_template : ImFontConfig();
if (!font_cfg_template)
{
font_cfg.OversampleH = font_cfg.OversampleV = 1;
font_cfg.PixelSnapH = true;
}
if (font_cfg.SizePixels <= 0.0f)
font_cfg.SizePixels = 13.0f * 1.0f;
if (font_cfg.Name[0] == '\0')
ImFormatString(font_cfg.Name, IM_ARRAYSIZE(font_cfg.Name), "ProggyClean.ttf, %dpx", (int)font_cfg.SizePixels);
font_cfg.EllipsisChar = (ImWchar)0x0085;
const char* ttf_compressed_base85 = GetDefaultCompressedFontDataTTFBase85();
const ImWchar* glyph_ranges = font_cfg.GlyphRanges != NULL ? font_cfg.GlyphRanges : GetGlyphRangesDefault();
ImFont* font = AddFontFromMemoryCompressedBase85TTF(ttf_compressed_base85, font_cfg.SizePixels, &font_cfg, glyph_ranges);
font->DisplayOffset.y = 1.0f;
return font;
}
ImFont* ImFontAtlas::AddFontFromFileTTF(const char* filename, float size_pixels, const ImFontConfig* font_cfg_template, const ImWchar* glyph_ranges)
{
IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas between NewFrame() and EndFrame/Render()!");
size_t data_size = 0;
void* data = ImFileLoadToMemory(filename, "rb", &data_size, 0);
if (!data)
{
IM_ASSERT_USER_ERROR(0, "Could not load font file!");
return NULL;
}
ImFontConfig font_cfg = font_cfg_template ? *font_cfg_template : ImFontConfig();
if (font_cfg.Name[0] == '\0')
{
// Store a short copy of filename into into the font name for convenience
const char* p;
for (p = filename + strlen(filename); p > filename && p[-1] != '/' && p[-1] != '\\'; p--) {}
ImFormatString(font_cfg.Name, IM_ARRAYSIZE(font_cfg.Name), "%s, %.0fpx", p, size_pixels);
}
return AddFontFromMemoryTTF(data, (int)data_size, size_pixels, &font_cfg, glyph_ranges);
}
// NB: Transfer ownership of 'ttf_data' to ImFontAtlas, unless font_cfg_template->FontDataOwnedByAtlas == false. Owned TTF buffer will be deleted after Build().
ImFont* ImFontAtlas::AddFontFromMemoryTTF(void* ttf_data, int ttf_size, float size_pixels, const ImFontConfig* font_cfg_template, const ImWchar* glyph_ranges)
{
IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas between NewFrame() and EndFrame/Render()!");
ImFontConfig font_cfg = font_cfg_template ? *font_cfg_template : ImFontConfig();
IM_ASSERT(font_cfg.FontData == NULL);
font_cfg.FontData = ttf_data;
font_cfg.FontDataSize = ttf_size;
font_cfg.SizePixels = size_pixels;
if (glyph_ranges)
font_cfg.GlyphRanges = glyph_ranges;
return AddFont(&font_cfg);
}
ImFont* ImFontAtlas::AddFontFromMemoryCompressedTTF(const void* compressed_ttf_data, int compressed_ttf_size, float size_pixels, const ImFontConfig* font_cfg_template, const ImWchar* glyph_ranges)
{
const unsigned int buf_decompressed_size = stb_decompress_length((const unsigned char*)compressed_ttf_data);
unsigned char* buf_decompressed_data = (unsigned char*)IM_ALLOC(buf_decompressed_size);
stb_decompress(buf_decompressed_data, (const unsigned char*)compressed_ttf_data, (unsigned int)compressed_ttf_size);
ImFontConfig font_cfg = font_cfg_template ? *font_cfg_template : ImFontConfig();
IM_ASSERT(font_cfg.FontData == NULL);
font_cfg.FontDataOwnedByAtlas = true;
return AddFontFromMemoryTTF(buf_decompressed_data, (int)buf_decompressed_size, size_pixels, &font_cfg, glyph_ranges);
}
ImFont* ImFontAtlas::AddFontFromMemoryCompressedBase85TTF(const char* compressed_ttf_data_base85, float size_pixels, const ImFontConfig* font_cfg, const ImWchar* glyph_ranges)
{
int compressed_ttf_size = (((int)strlen(compressed_ttf_data_base85) + 4) / 5) * 4;
void* compressed_ttf = IM_ALLOC((size_t)compressed_ttf_size);
Decode85((const unsigned char*)compressed_ttf_data_base85, (unsigned char*)compressed_ttf);
ImFont* font = AddFontFromMemoryCompressedTTF(compressed_ttf, compressed_ttf_size, size_pixels, font_cfg, glyph_ranges);
IM_FREE(compressed_ttf);
return font;
}
int ImFontAtlas::AddCustomRectRegular(int width, int height)
{
IM_ASSERT(width > 0 && width <= 0xFFFF);
IM_ASSERT(height > 0 && height <= 0xFFFF);
ImFontAtlasCustomRect r;
r.Width = (unsigned short)width;
r.Height = (unsigned short)height;
CustomRects.push_back(r);
return CustomRects.Size - 1; // Return index
}
int ImFontAtlas::AddCustomRectFontGlyph(ImFont* font, ImWchar id, int width, int height, float advance_x, const ImVec2& offset)
{
#ifdef IMGUI_USE_WCHAR32
IM_ASSERT(id <= IM_UNICODE_CODEPOINT_MAX);
#endif
IM_ASSERT(font != NULL);
IM_ASSERT(width > 0 && width <= 0xFFFF);
IM_ASSERT(height > 0 && height <= 0xFFFF);
ImFontAtlasCustomRect r;
r.Width = (unsigned short)width;
r.Height = (unsigned short)height;
r.GlyphID = id;
r.GlyphAdvanceX = advance_x;
r.GlyphOffset = offset;
r.Font = font;
CustomRects.push_back(r);
return CustomRects.Size - 1; // Return index
}
void ImFontAtlas::CalcCustomRectUV(const ImFontAtlasCustomRect* rect, ImVec2* out_uv_min, ImVec2* out_uv_max) const
{
IM_ASSERT(TexWidth > 0 && TexHeight > 0); // Font atlas needs to be built before we can calculate UV coordinates
IM_ASSERT(rect->IsPacked()); // Make sure the rectangle has been packed
*out_uv_min = ImVec2((float)rect->X * TexUvScale.x, (float)rect->Y * TexUvScale.y);
*out_uv_max = ImVec2((float)(rect->X + rect->Width) * TexUvScale.x, (float)(rect->Y + rect->Height) * TexUvScale.y);
}
bool ImFontAtlas::GetMouseCursorTexData(ImGuiMouseCursor cursor_type, ImVec2* out_offset, ImVec2* out_size, ImVec2 out_uv_border[2], ImVec2 out_uv_fill[2])
{
if (cursor_type <= ImGuiMouseCursor_None || cursor_type >= ImGuiMouseCursor_COUNT)
return false;
if (Flags & ImFontAtlasFlags_NoMouseCursors)
return false;
IM_ASSERT(PackIdMouseCursors != -1);
ImFontAtlasCustomRect* r = GetCustomRectByIndex(PackIdMouseCursors);
ImVec2 pos = FONT_ATLAS_DEFAULT_TEX_CURSOR_DATA[cursor_type][0] + ImVec2((float)r->X, (float)r->Y);
ImVec2 size = FONT_ATLAS_DEFAULT_TEX_CURSOR_DATA[cursor_type][1];
*out_size = size;
*out_offset = FONT_ATLAS_DEFAULT_TEX_CURSOR_DATA[cursor_type][2];
out_uv_border[0] = (pos) * TexUvScale;
out_uv_border[1] = (pos + size) * TexUvScale;
pos.x += FONT_ATLAS_DEFAULT_TEX_DATA_W_HALF + 1;
out_uv_fill[0] = (pos) * TexUvScale;
out_uv_fill[1] = (pos + size) * TexUvScale;
return true;
}
bool ImFontAtlas::Build()
{
IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas between NewFrame() and EndFrame/Render()!");
return ImFontAtlasBuildWithStbTruetype(this);
}
void ImFontAtlasBuildMultiplyCalcLookupTable(unsigned char out_table[256], float in_brighten_factor)
{
for (unsigned int i = 0; i < 256; i++)
{
unsigned int value = (unsigned int)(i * in_brighten_factor);
out_table[i] = value > 255 ? 255 : (value & 0xFF);
}
}
void ImFontAtlasBuildMultiplyRectAlpha8(const unsigned char table[256], unsigned char* pixels, int x, int y, int w, int h, int stride)
{
unsigned char* data = pixels + x + y * stride;
for (int j = h; j > 0; j--, data += stride)
for (int i = 0; i < w; i++)
data[i] = table[data[i]];
}
// Temporary data for one source font (multiple source fonts can be merged into one destination ImFont)
// (C++03 doesn't allow instancing ImVector<> with function-local types so we declare the type here.)
struct ImFontBuildSrcData
{
stbtt_fontinfo FontInfo;
stbtt_pack_range PackRange; // Hold the list of codepoints to pack (essentially points to Codepoints.Data)
stbrp_rect* Rects; // Rectangle to pack. We first fill in their size and the packer will give us their position.
stbtt_packedchar* PackedChars; // Output glyphs
const ImWchar* SrcRanges; // Ranges as requested by user (user is allowed to request too much, e.g. 0x0020..0xFFFF)
int DstIndex; // Index into atlas->Fonts[] and dst_tmp_array[]
int GlyphsHighest; // Highest requested codepoint
int GlyphsCount; // Glyph count (excluding missing glyphs and glyphs already set by an earlier source font)
ImBitVector GlyphsSet; // Glyph bit map (random access, 1-bit per codepoint. This will be a maximum of 8KB)
ImVector<int> GlyphsList; // Glyph codepoints list (flattened version of GlyphsMap)
};
// Temporary data for one destination ImFont* (multiple source fonts can be merged into one destination ImFont)
struct ImFontBuildDstData
{
int SrcCount; // Number of source fonts targeting this destination font.
int GlyphsHighest;
int GlyphsCount;
ImBitVector GlyphsSet; // This is used to resolve collision when multiple sources are merged into a same destination font.
};
static void UnpackBitVectorToFlatIndexList(const ImBitVector* in, ImVector<int>* out)
{
IM_ASSERT(sizeof(in->Storage.Data[0]) == sizeof(int));
const ImU32* it_begin = in->Storage.begin();
const ImU32* it_end = in->Storage.end();
for (const ImU32* it = it_begin; it < it_end; it++)
if (ImU32 entries_32 = *it)
for (ImU32 bit_n = 0; bit_n < 32; bit_n++)
if (entries_32 & ((ImU32)1 << bit_n))
out->push_back((int)(((it - it_begin) << 5) + bit_n));
}
bool ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas)
{
IM_ASSERT(atlas->ConfigData.Size > 0);
ImFontAtlasBuildInit(atlas);
// Clear atlas
atlas->TexID = (ImTextureID)NULL;
atlas->TexWidth = atlas->TexHeight = 0;
atlas->TexUvScale = ImVec2(0.0f, 0.0f);
atlas->TexUvWhitePixel = ImVec2(0.0f, 0.0f);
atlas->ClearTexData();
// Temporary storage for building
ImVector<ImFontBuildSrcData> src_tmp_array;
ImVector<ImFontBuildDstData> dst_tmp_array;
src_tmp_array.resize(atlas->ConfigData.Size);
dst_tmp_array.resize(atlas->Fonts.Size);
memset(src_tmp_array.Data, 0, (size_t)src_tmp_array.size_in_bytes());
memset(dst_tmp_array.Data, 0, (size_t)dst_tmp_array.size_in_bytes());
// 1. Initialize font loading structure, check font data validity
for (int src_i = 0; src_i < atlas->ConfigData.Size; src_i++)
{
ImFontBuildSrcData& src_tmp = src_tmp_array[src_i];
ImFontConfig& cfg = atlas->ConfigData[src_i];
IM_ASSERT(cfg.DstFont && (!cfg.DstFont->IsLoaded() || cfg.DstFont->ContainerAtlas == atlas));
// Find index from cfg.DstFont (we allow the user to set cfg.DstFont. Also it makes casual debugging nicer than when storing indices)
src_tmp.DstIndex = -1;
for (int output_i = 0; output_i < atlas->Fonts.Size && src_tmp.DstIndex == -1; output_i++)
if (cfg.DstFont == atlas->Fonts[output_i])
src_tmp.DstIndex = output_i;
IM_ASSERT(src_tmp.DstIndex != -1); // cfg.DstFont not pointing within atlas->Fonts[] array?
if (src_tmp.DstIndex == -1)
return false;
// Initialize helper structure for font loading and verify that the TTF/OTF data is correct
const int font_offset = stbtt_GetFontOffsetForIndex((unsigned char*)cfg.FontData, cfg.FontNo);
IM_ASSERT(font_offset >= 0 && "FontData is incorrect, or FontNo cannot be found.");
if (!stbtt_InitFont(&src_tmp.FontInfo, (unsigned char*)cfg.FontData, font_offset))
return false;
// Measure highest codepoints
ImFontBuildDstData& dst_tmp = dst_tmp_array[src_tmp.DstIndex];
src_tmp.SrcRanges = cfg.GlyphRanges ? cfg.GlyphRanges : atlas->GetGlyphRangesDefault();
for (const ImWchar* src_range = src_tmp.SrcRanges; src_range[0] && src_range[1]; src_range += 2)
src_tmp.GlyphsHighest = ImMax(src_tmp.GlyphsHighest, (int)src_range[1]);
dst_tmp.SrcCount++;
dst_tmp.GlyphsHighest = ImMax(dst_tmp.GlyphsHighest, src_tmp.GlyphsHighest);
}
// 2. For every requested codepoint, check for their presence in the font data, and handle redundancy or overlaps between source fonts to avoid unused glyphs.
int total_glyphs_count = 0;
for (int src_i = 0; src_i < src_tmp_array.Size; src_i++)
{
ImFontBuildSrcData& src_tmp = src_tmp_array[src_i];
ImFontBuildDstData& dst_tmp = dst_tmp_array[src_tmp.DstIndex];
src_tmp.GlyphsSet.Create(src_tmp.GlyphsHighest + 1);
if (dst_tmp.GlyphsSet.Storage.empty())
dst_tmp.GlyphsSet.Create(dst_tmp.GlyphsHighest + 1);
for (const ImWchar* src_range = src_tmp.SrcRanges; src_range[0] && src_range[1]; src_range += 2)
for (unsigned int codepoint = src_range[0]; codepoint <= src_range[1]; codepoint++)
{
if (dst_tmp.GlyphsSet.TestBit(codepoint)) // Don't overwrite existing glyphs. We could make this an option for MergeMode (e.g. MergeOverwrite==true)
continue;
if (!stbtt_FindGlyphIndex(&src_tmp.FontInfo, codepoint)) // It is actually in the font?
continue;
// Add to avail set/counters
src_tmp.GlyphsCount++;
dst_tmp.GlyphsCount++;
src_tmp.GlyphsSet.SetBit(codepoint);
dst_tmp.GlyphsSet.SetBit(codepoint);
total_glyphs_count++;
}
}
// 3. Unpack our bit map into a flat list (we now have all the Unicode points that we know are requested _and_ available _and_ not overlapping another)
for (int src_i = 0; src_i < src_tmp_array.Size; src_i++)
{
ImFontBuildSrcData& src_tmp = src_tmp_array[src_i];
src_tmp.GlyphsList.reserve(src_tmp.GlyphsCount);
UnpackBitVectorToFlatIndexList(&src_tmp.GlyphsSet, &src_tmp.GlyphsList);
src_tmp.GlyphsSet.Clear();
IM_ASSERT(src_tmp.GlyphsList.Size == src_tmp.GlyphsCount);
}
for (int dst_i = 0; dst_i < dst_tmp_array.Size; dst_i++)
dst_tmp_array[dst_i].GlyphsSet.Clear();
dst_tmp_array.clear();
// Allocate packing character data and flag packed characters buffer as non-packed (x0=y0=x1=y1=0)
// (We technically don't need to zero-clear buf_rects, but let's do it for the sake of sanity)
ImVector<stbrp_rect> buf_rects;
ImVector<stbtt_packedchar> buf_packedchars;
buf_rects.resize(total_glyphs_count);
buf_packedchars.resize(total_glyphs_count);
memset(buf_rects.Data, 0, (size_t)buf_rects.size_in_bytes());
memset(buf_packedchars.Data, 0, (size_t)buf_packedchars.size_in_bytes());
// 4. Gather glyphs sizes so we can pack them in our virtual canvas.
int total_surface = 0;
int buf_rects_out_n = 0;
int buf_packedchars_out_n = 0;
for (int src_i = 0; src_i < src_tmp_array.Size; src_i++)
{
ImFontBuildSrcData& src_tmp = src_tmp_array[src_i];
if (src_tmp.GlyphsCount == 0)
continue;
src_tmp.Rects = &buf_rects[buf_rects_out_n];
src_tmp.PackedChars = &buf_packedchars[buf_packedchars_out_n];
buf_rects_out_n += src_tmp.GlyphsCount;
buf_packedchars_out_n += src_tmp.GlyphsCount;
// Convert our ranges in the format stb_truetype wants
ImFontConfig& cfg = atlas->ConfigData[src_i];
src_tmp.PackRange.font_size = cfg.SizePixels;
src_tmp.PackRange.first_unicode_codepoint_in_range = 0;
src_tmp.PackRange.array_of_unicode_codepoints = src_tmp.GlyphsList.Data;
src_tmp.PackRange.num_chars = src_tmp.GlyphsList.Size;
src_tmp.PackRange.chardata_for_range = src_tmp.PackedChars;
src_tmp.PackRange.h_oversample = (unsigned char)cfg.OversampleH;
src_tmp.PackRange.v_oversample = (unsigned char)cfg.OversampleV;
// Gather the sizes of all rectangles we will need to pack (this loop is based on stbtt_PackFontRangesGatherRects)
const float scale = (cfg.SizePixels > 0) ? stbtt_ScaleForPixelHeight(&src_tmp.FontInfo, cfg.SizePixels) : stbtt_ScaleForMappingEmToPixels(&src_tmp.FontInfo, -cfg.SizePixels);
const int padding = atlas->TexGlyphPadding;
for (int glyph_i = 0; glyph_i < src_tmp.GlyphsList.Size; glyph_i++)
{
int x0, y0, x1, y1;
const int glyph_index_in_font = stbtt_FindGlyphIndex(&src_tmp.FontInfo, src_tmp.GlyphsList[glyph_i]);
IM_ASSERT(glyph_index_in_font != 0);
stbtt_GetGlyphBitmapBoxSubpixel(&src_tmp.FontInfo, glyph_index_in_font, scale * cfg.OversampleH, scale * cfg.OversampleV, 0, 0, &x0, &y0, &x1, &y1);
src_tmp.Rects[glyph_i].w = (stbrp_coord)(x1 - x0 +