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Fonts: (Breaking) Rename ImGuiFreeType:: flags to ImGuiFreeTypeBuilderFlags_XXX. Remove ImGuiFreeType::BuildFontAtlas() flags. Rename ImFontConfig::RasterizerFlags to FontBuilderFlags. Add ImFontBuilderIO (opaque). Amend 53d59f3 with a dozen of small fixes.
This commit is contained in:
ocornut
parent
9417acc20f
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3867c6c5f0
@ -35,10 +35,21 @@ HOW TO UPDATE?
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VERSION 1.81 WIP (In Progress)
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-----------------------------------------------------------------------
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Breaking Changes:
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- imgui_freetype: Removed ImGuiFreeType::BuildFontAtlas() extra flags, now stored in ImFontAtlas::FontBuilderFlags.
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- imgui_freetype: Renamed ImFontConfig::RasterizerFlags (used by FreeType) to ImFontConfig::FontBuilderFlags.
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- imgui_freetyoe: Renamed ImGuiFreeType::XXX flags to ImGuiFreeTypeBuilderFlags_XXX for consistency with other API.
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Other Changes:
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- Window: Fixed minor title bar text clipping issue when FramePadding is small/zero and there are no
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close button in the window. (#3731)
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- imgui_freetype: Facilitated using FreeType integration: [@Xipiryon, @ocornut]
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- Use '#define IMGUI_ENABLE_FREETYPE' in imconfig.h should make it work with no other modifications
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other than compiling misc/freetype/imgui_freetype.cpp and linking with FreeType.
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- Use '#define IMGUI_ENABLE_STB_TRUETYPE' if you somehow need the stb_truetype rasterizer to be
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compiled in along with the FreeType one, otherwise it is enabled by default.
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- ImDrawList: Fixed AddCircle()/AddCircleFilled() with (rad > 0.0f && rad < 1.0f && num_segments == 0). (#3738)
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Would lead to a buffer read overflow.
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- Backends: Win32: Dynamically loading XInput DLL instead of linking with it, facilite compiling with
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@ -142,9 +153,6 @@ Other Changes:
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- Style: Changed default style.WindowRounding value to 0.0f (matches default for multi-viewports).
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- Style: Reduced the size of the resizing grip, made alpha less prominent.
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- Style: Classic: Increase the default alpha value of WindowBg to be closer to other styles.
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- Fonts: Ease Freetype integration with IMGUI_ENABLE_FREETYPE: When enabled, it Will use the library to rasterize font by default.
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Also renamed IMGUI_DISABLE_STB_TRUETYPE to IMGUI_ENABLE_STB_TRUETYPE, and making it the default rasterizer
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if IMGUI_ENABLE_FREETYPE is not defined. [@Xipiryon]
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- Demo: Clarify usage of right-aligned items in Demo>Layout>Widgets Width.
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- Backends: OpenGL3: Use glGetString(GL_VERSION) query instead of glGetIntegerv(GL_MAJOR_VERSION, ...)
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when the later returns zero (e.g. Desktop GL 2.x). (#3530) [@xndcn]
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13
imconfig.h
13
imconfig.h
@ -53,20 +53,23 @@
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//#define IMGUI_USE_WCHAR32
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//---- Avoid multiple STB libraries implementations, or redefine path/filenames to prioritize another version
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// By default the embedded implementations are declared static and not available outside of imgui cpp files.
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// By default the embedded implementations are declared static and not available outside of Dear ImGui sources files.
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//#define IMGUI_STB_TRUETYPE_FILENAME "my_folder/stb_truetype.h"
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//#define IMGUI_STB_RECT_PACK_FILENAME "my_folder/stb_rect_pack.h"
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//#define IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
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//#define IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION
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//---- Use stb_printf's faster implementation of vsnprintf instead of the one from libc (unless IMGUI_DISABLE_DEFAULT_FORMAT_FUNCTIONS is defined)
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// Requires 'stb_sprintf.h' to be available in the include path. Compatibility checks of arguments and formats done by clang and GCC will be disabled in order to support the extra formats provided by STB sprintf.
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// #define IMGUI_USE_STB_SPRINTF
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//---- Use Freetype to build and rasterize the font atlas (instead of stb_truetype which is embedded by default in Dear ImGui)
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// Requires Freetype headers to be available in the include path. Requires program to be compiled with 'misc/freetype/imgui_freetype.cpp' (in this repository) + the Freetype library (not provided)
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//---- Use FreeType to build and rasterize the font atlas (instead of stb_truetype which is embedded by default in Dear ImGui)
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// Requires FreeType headers to be available in the include path. Requires program to be compiled with 'misc/freetype/imgui_freetype.cpp' (in this repository) + the FreeType library (not provided).
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// On Windows you may use vcpkg with 'vcpkg install freetype' + 'vcpkg integrate install'.
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//#define IMGUI_ENABLE_FREETYPE
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//---- Use stb_truetype to build and rasterize the font atlas (this is enabled by default)
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// The only purpose of this this define is if you want force compilation of the stb_truetype backend ALONG with the Freetype backend.
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//---- Use stb_truetype to build and rasterize the font atlas (default)
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// The only purpose of this define is if you want force compilation of the stb_truetype backend ALONG with the FreeType backend.
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//#define IMGUI_ENABLE_STB_TRUETYPE
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//---- Define constructor and implicit cast operators to convert back<>forth between your math types and ImVec2/ImVec4.
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@ -373,6 +373,9 @@ CODE
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When you are not sure about a old symbol or function name, try using the Search/Find function of your IDE to look for comments or references in all imgui files.
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You can read releases logs https://github.com/ocornut/imgui/releases for more details.
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- 2021/01/26 (1.81) - imgui_freetype: removed ImGuiFreeType::BuildFontAtlas() extra flags, now stored in ImFontAtlas::FontBuilderFlags.
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- imgui_freetype: renamed ImFontConfig::RasterizerFlags (used by FreeType) to ImFontConfig::FontBuilderFlags.
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- imgui_freetype: renamed ImGuiFreeType::XXX flags to ImGuiFreeTypeBuilderFlags_XXX for consistency with other API.
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- 2020/10/12 (1.80) - removed redirecting functions/enums that were marked obsolete in 1.63 (August 2018):
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- ImGui::IsItemDeactivatedAfterChange() -> use ImGui::IsItemDeactivatedAfterEdit().
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- ImGuiCol_ModalWindowDarkening -> use ImGuiCol_ModalWindowDimBg
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8
imgui.h
8
imgui.h
@ -125,6 +125,7 @@ struct ImDrawListSplitter; // Helper to split a draw list into differen
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struct ImDrawVert; // A single vertex (pos + uv + col = 20 bytes by default. Override layout with IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT)
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struct ImFont; // Runtime data for a single font within a parent ImFontAtlas
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struct ImFontAtlas; // Runtime data for multiple fonts, bake multiple fonts into a single texture, TTF/OTF font loader
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struct ImFontBuilderIO; // Opaque interface to a font builder (stb_truetype or FreeType).
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struct ImFontConfig; // Configuration data when adding a font or merging fonts
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struct ImFontGlyph; // A single font glyph (code point + coordinates within in ImFontAtlas + offset)
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struct ImFontGlyphRangesBuilder; // Helper to build glyph ranges from text/string data
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@ -2488,7 +2489,7 @@ struct ImFontConfig
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float GlyphMinAdvanceX; // 0 // Minimum AdvanceX for glyphs, set Min to align font icons, set both Min/Max to enforce mono-space font
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float GlyphMaxAdvanceX; // FLT_MAX // Maximum AdvanceX for glyphs
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bool MergeMode; // false // Merge into previous ImFont, so you can combine multiple inputs font into one ImFont (e.g. ASCII font + icons + Japanese glyphs). You may want to use GlyphOffset.y when merge font of different heights.
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unsigned int RasterizerFlags; // 0x00 // Settings for custom font rasterizer (e.g. ImGuiFreeType). Leave as zero if you aren't using one.
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unsigned int FontBuilderFlags; // 0 // Settings for custom font builder. THIS IS BUILDER IMPLEMENTATION DEPENDENT. Leave as zero if unsure.
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float RasterizerMultiply; // 1.0f // Brighten (>1.0f) or darken (<1.0f) font output. Brightening small fonts may be a good workaround to make them more readable.
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ImWchar EllipsisChar; // -1 // Explicitly specify unicode codepoint of ellipsis character. When fonts are being merged first specified ellipsis will be used.
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@ -2634,7 +2635,6 @@ struct ImFontAtlas
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ImTextureID TexID; // User data to refer to the texture once it has been uploaded to user's graphic systems. It is passed back to you during rendering via the ImDrawCmd structure.
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int TexDesiredWidth; // Texture width desired by user before Build(). Must be a power-of-two. If have many glyphs your graphics API have texture size restrictions you may want to increase texture width to decrease height.
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int TexGlyphPadding; // Padding between glyphs within texture in pixels. Defaults to 1. If your rendering method doesn't rely on bilinear filtering you may set this to 0.
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const char* Builder; // Select font builder/rasterizer. Default to "stb_truetype". Set to "freetype" to enable Freetype (default if IMGUI_ENABLE_FREETYPE is defined).
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// [Internal]
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// NB: Access texture data via GetTexData*() calls! Which will setup a default font for you.
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@ -2649,6 +2649,10 @@ struct ImFontAtlas
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ImVector<ImFontConfig> ConfigData; // Configuration data
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ImVec4 TexUvLines[IM_DRAWLIST_TEX_LINES_WIDTH_MAX + 1]; // UVs for baked anti-aliased lines
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// [Internal] Font builder
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const ImFontBuilderIO* FontBuilderIO; // Opaque interface to a font builder (default to stb_truetype, can be changed to use FreeType by defining IMGUI_ENABLE_FREETYPE).
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unsigned int FontBuilderFlags; // Shared flags (for all fonts) for custom font builder. THIS IS BUILD IMPLEMENTATION DEPENDENT. Per-font override is also available in ImFontConfig.
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// [Internal] Packing data
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int PackIdMouseCursors; // Custom texture rectangle ID for white pixel and mouse cursors
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int PackIdLines; // Custom texture rectangle ID for baked anti-aliased lines
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@ -122,7 +122,7 @@ namespace IMGUI_STB_NAMESPACE
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#endif
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#ifndef STB_RECT_PACK_IMPLEMENTATION // in case the user already have an implementation in the _same_ compilation unit (e.g. unity builds)
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#ifndef IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION
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#ifndef IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION // in case the user already have an implementation in another compilation unit
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#define STBRP_STATIC
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#define STBRP_ASSERT(x) do { IM_ASSERT(x); } while (0)
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#define STBRP_SORT ImQsort
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@ -137,7 +137,7 @@ namespace IMGUI_STB_NAMESPACE
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#ifdef IMGUI_ENABLE_STB_TRUETYPE
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#ifndef STB_TRUETYPE_IMPLEMENTATION // in case the user already have an implementation in the _same_ compilation unit (e.g. unity builds)
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#ifndef IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
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#ifndef IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION // in case the user already have an implementation in another compilation unit
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#define STBTT_malloc(x,u) ((void)(u), IM_ALLOC(x))
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#define STBTT_free(x,u) ((void)(u), IM_FREE(x))
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#define STBTT_assert(x) do { IM_ASSERT(x); } while(0)
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@ -158,7 +158,7 @@ namespace IMGUI_STB_NAMESPACE
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#include "imstb_truetype.h"
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#endif
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#endif
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#endif
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#endif // IMGUI_ENABLE_STB_TRUETYPE
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#if defined(__GNUC__)
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#pragma GCC diagnostic pop
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@ -1782,14 +1782,6 @@ ImFontAtlas::ImFontAtlas()
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memset(this, 0, sizeof(*this));
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TexGlyphPadding = 1;
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PackIdMouseCursors = PackIdLines = -1;
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#ifdef IMGUI_ENABLE_FREETYPE
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Builder = "freetype";
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#else
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# ifdef IMGUI_ENABLE_STB_TRUETYPE
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Builder = "stb_truetype";
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# endif
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#endif
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}
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ImFontAtlas::~ImFontAtlas()
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@ -2074,17 +2066,26 @@ bool ImFontAtlas::GetMouseCursorTexData(ImGuiMouseCursor cursor_type, ImVec2* ou
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bool ImFontAtlas::Build()
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{
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IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas between NewFrame() and EndFrame/Render()!");
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// Select builder
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// - Note that we do not reassign to atlas->FontBuilderIO, since it is likely to point to static data which
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// may mess with some hot-reloading schemes. If you need to assign to this (for dynamic selection) AND are
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// using a hot-reloading scheme that messes up static data, store your own instance of ImFontBuilderIO somewhere
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// and point to it instead of pointing directly to return value of the GetBuilderXXX functions.
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const ImFontBuilderIO* builder_io = FontBuilderIO;
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if (builder_io == NULL)
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{
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#ifdef IMGUI_ENABLE_FREETYPE
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if (strcmp(Builder, "freetype") == 0)
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return ImGuiFreeType::BuildFontAtlas(this, 0);
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builder_io = ImGuiFreeType::GetBuilderForFreeType();
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#elif defined(IMGUI_ENABLE_STB_TRUETYPE)
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builder_io = ImFontAtlasGetBuilderForStbTruetype();
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#else
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IM_ASSERT(0); // Invalid Build function
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#endif
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// Not doing "#else" here, since we could have both
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// IMGUI_ENABLE_FREETYPE and IMGUI_ENABLE_STB_TRUETYPE defined.
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#ifdef IMGUI_ENABLE_STB_TRUETYPE
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if (strcmp(Builder, "stb_truetype") == 0)
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return ImFontAtlasBuildWithStbTruetype(this);
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#endif
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return false;
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}
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// Build
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return builder_io->FontBuilder_Build(this);
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}
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void ImFontAtlasBuildMultiplyCalcLookupTable(unsigned char out_table[256], float in_brighten_factor)
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@ -2142,7 +2143,7 @@ static void UnpackBitVectorToFlatIndexList(const ImBitVector* in, ImVector<int>*
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out->push_back((int)(((it - it_begin) << 5) + bit_n));
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}
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bool ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas)
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static bool ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas)
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{
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IM_ASSERT(atlas->ConfigData.Size > 0);
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@ -2394,7 +2395,15 @@ bool ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas)
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ImFontAtlasBuildFinish(atlas);
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return true;
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}
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#endif
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const ImFontBuilderIO* ImFontAtlasGetBuilderForStbTruetype()
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{
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static ImFontBuilderIO io;
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io.FontBuilder_Build = ImFontAtlasBuildWithStbTruetype;
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return &io;
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}
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#endif // IMGUI_ENABLE_STB_TRUETYPE
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void ImFontAtlasBuildSetupFont(ImFontAtlas* atlas, ImFont* font, ImFontConfig* font_config, float ascent, float descent)
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{
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@ -29,7 +29,8 @@ Index of this file:
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// [SECTION] ImGuiWindowTempData, ImGuiWindow
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// [SECTION] Tab bar, Tab item support
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// [SECTION] Table support
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// [SECTION] Internal API
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// [SECTION] ImGui internal API
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// [SECTION] ImFontAtlas internal API
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// [SECTION] Test Engine specific hooks (imgui_test_engine)
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*/
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@ -83,7 +84,8 @@ Index of this file:
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#error Use IMGUI_DISABLE_DEFAULT_MATH_FUNCTIONS
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#endif
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// Enable stb_truetype by default unless Freetype is enable. User can compile both by defining both IMGUI_ENABLE_FREETYPE and IMGUI_ENABLE_STB_TRUETYPE
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// Enable stb_truetype by default unless FreeType is enabled.
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// You can compile with both by defining both IMGUI_ENABLE_FREETYPE and IMGUI_ENABLE_STB_TRUETYPE together.
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#ifndef IMGUI_ENABLE_FREETYPE
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#define IMGUI_ENABLE_STB_TRUETYPE
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#endif
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@ -2144,7 +2146,7 @@ struct ImGuiTableSettings
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#endif // #ifdef IMGUI_HAS_TABLE
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//-----------------------------------------------------------------------------
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// [SECTION] Internal API
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// [SECTION] ImGui internal API
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// No guarantee of forward compatibility here!
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//-----------------------------------------------------------------------------
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@ -2490,15 +2492,26 @@ namespace ImGui
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} // namespace ImGui
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// ImFontAtlas internals
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IMGUI_API bool ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas);
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IMGUI_API void ImFontAtlasBuildInit(ImFontAtlas* atlas);
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IMGUI_API void ImFontAtlasBuildSetupFont(ImFontAtlas* atlas, ImFont* font, ImFontConfig* font_config, float ascent, float descent);
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IMGUI_API void ImFontAtlasBuildPackCustomRects(ImFontAtlas* atlas, void* stbrp_context_opaque);
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IMGUI_API void ImFontAtlasBuildFinish(ImFontAtlas* atlas);
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IMGUI_API void ImFontAtlasBuildRender1bppRectFromString(ImFontAtlas* atlas, int atlas_x, int atlas_y, int w, int h, const char* in_str, char in_marker_char, unsigned char in_marker_pixel_value);
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IMGUI_API void ImFontAtlasBuildMultiplyCalcLookupTable(unsigned char out_table[256], float in_multiply_factor);
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IMGUI_API void ImFontAtlasBuildMultiplyRectAlpha8(const unsigned char table[256], unsigned char* pixels, int x, int y, int w, int h, int stride);
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//-----------------------------------------------------------------------------
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// [SECTION] ImFontAtlas internal API
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//-----------------------------------------------------------------------------
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// This structure is likely to evolve as we add support for incremental atlas updates
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struct ImFontBuilderIO
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{
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bool (*FontBuilder_Build)(ImFontAtlas* atlas);
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};
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// Helper for font builder
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IMGUI_API const ImFontBuilderIO* ImFontAtlasGetBuilderForStbTruetype();
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IMGUI_API void ImFontAtlasBuildInit(ImFontAtlas* atlas);
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IMGUI_API void ImFontAtlasBuildSetupFont(ImFontAtlas* atlas, ImFont* font, ImFontConfig* font_config, float ascent, float descent);
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IMGUI_API void ImFontAtlasBuildPackCustomRects(ImFontAtlas* atlas, void* stbrp_context_opaque);
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IMGUI_API void ImFontAtlasBuildFinish(ImFontAtlas* atlas);
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IMGUI_API void ImFontAtlasBuildRender1bppRectFromString(ImFontAtlas* atlas, int atlas_x, int atlas_y, int w, int h, const char* in_str, char in_marker_char, unsigned char in_marker_pixel_value);
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IMGUI_API void ImFontAtlasBuildMultiplyCalcLookupTable(unsigned char out_table[256], float in_multiply_factor);
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IMGUI_API void ImFontAtlasBuildMultiplyRectAlpha8(const unsigned char table[256], unsigned char* pixels, int x, int y, int w, int h, int stride);
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//-----------------------------------------------------------------------------
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// [SECTION] Test Engine specific hooks (imgui_test_engine)
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@ -1,131 +1,24 @@
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# imgui_freetype
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Build font atlases using FreeType instead of stb_truetype (which is the default font rasterizer in Dear ImGui).
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Build font atlases using FreeType instead of stb_truetype (which is the default font rasterizer).
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<br>by @vuhdo, @mikesart, @ocornut.
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### Usage
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1. Get latest FreeType binaries or build yourself (under Windows you may use vcpkg with `vcpkg install freetype`, `vcpkg integrate install`).
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2. Add imgui_freetype.h/cpp alongside your imgui sources.
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3. Include imgui_freetype.h after imgui.h.
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4. Call `ImGuiFreeType::BuildFontAtlas()` *BEFORE* calling `ImFontAtlas::GetTexDataAsRGBA32()` or `ImFontAtlas::Build()` (so normal Build() won't be called):
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2. Add imgui_freetype.h/cpp alongside your project files.
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3. Add `#define IMGUI_ENABLE_FREETYPE` in your [imconfig.h](https://github.com/ocornut/imgui/blob/master/imconfig.h) file
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```cpp
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// See ImGuiFreeType::RasterizationFlags
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unsigned int flags = ImGuiFreeType::NoHinting;
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ImGuiFreeType::BuildFontAtlas(io.Fonts, flags);
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io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
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```
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### Gamma Correct Blending
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### About Gamma Correct Blending
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FreeType assumes blending in linear space rather than gamma space.
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See FreeType note for [FT_Render_Glyph](https://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html#FT_Render_Glyph).
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For correct results you need to be using sRGB and convert to linear space in the pixel shader output.
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The default Dear ImGui styles will be impacted by this change (alpha values will need tweaking).
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### Test code Usage
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```cpp
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#include "misc/freetype/imgui_freetype.h"
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#include "misc/freetype/imgui_freetype.cpp"
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### Testbed for toying with settings (for developers)
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// Load various small fonts
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ImGuiIO& io = ImGui::GetIO();
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io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 13.0f);
|
||||
io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 13.0f);
|
||||
io.Fonts->AddFontDefault();
|
||||
|
||||
FreeTypeTest freetype_test;
|
||||
|
||||
// Main Loop
|
||||
while (true)
|
||||
{
|
||||
if (freetype_test.UpdateRebuild())
|
||||
{
|
||||
// REUPLOAD FONT TEXTURE TO GPU
|
||||
ImGui_ImplXXX_DestroyDeviceObjects();
|
||||
ImGui_ImplXXX_CreateDeviceObjects();
|
||||
}
|
||||
ImGui::NewFrame();
|
||||
freetype_test.ShowFreetypeOptionsWindow();
|
||||
...
|
||||
}
|
||||
```
|
||||
|
||||
### Test code
|
||||
```cpp
|
||||
#include "misc/freetype/imgui_freetype.h"
|
||||
#include "misc/freetype/imgui_freetype.cpp"
|
||||
|
||||
struct FreeTypeTest
|
||||
{
|
||||
enum FontBuildMode
|
||||
{
|
||||
FontBuildMode_FreeType,
|
||||
FontBuildMode_Stb
|
||||
};
|
||||
|
||||
FontBuildMode BuildMode;
|
||||
bool WantRebuild;
|
||||
float FontsMultiply;
|
||||
int FontsPadding;
|
||||
unsigned int FontsFlags;
|
||||
|
||||
FreeTypeTest()
|
||||
{
|
||||
BuildMode = FontBuildMode_FreeType;
|
||||
WantRebuild = true;
|
||||
FontsMultiply = 1.0f;
|
||||
FontsPadding = 1;
|
||||
FontsFlags = 0;
|
||||
}
|
||||
|
||||
// Call _BEFORE_ NewFrame()
|
||||
bool UpdateRebuild()
|
||||
{
|
||||
if (!WantRebuild)
|
||||
return false;
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
io.Fonts->TexGlyphPadding = FontsPadding;
|
||||
for (int n = 0; n < io.Fonts->ConfigData.Size; n++)
|
||||
{
|
||||
ImFontConfig* font_config = (ImFontConfig*)&io.Fonts->ConfigData[n];
|
||||
font_config->RasterizerMultiply = FontsMultiply;
|
||||
font_config->RasterizerFlags = (BuildMode == FontBuildMode_FreeType) ? FontsFlags : 0x00;
|
||||
}
|
||||
if (BuildMode == FontBuildMode_FreeType)
|
||||
ImGuiFreeType::BuildFontAtlas(io.Fonts, FontsFlags);
|
||||
else if (BuildMode == FontBuildMode_Stb)
|
||||
io.Fonts->Build();
|
||||
WantRebuild = false;
|
||||
return true;
|
||||
}
|
||||
|
||||
// Call to draw interface
|
||||
void ShowFreetypeOptionsWindow()
|
||||
{
|
||||
ImGui::Begin("FreeType Options");
|
||||
ImGui::ShowFontSelector("Fonts");
|
||||
WantRebuild |= ImGui::RadioButton("FreeType", (int*)&BuildMode, FontBuildMode_FreeType);
|
||||
ImGui::SameLine();
|
||||
WantRebuild |= ImGui::RadioButton("Stb (Default)", (int*)&BuildMode, FontBuildMode_Stb);
|
||||
WantRebuild |= ImGui::DragFloat("Multiply", &FontsMultiply, 0.001f, 0.0f, 2.0f);
|
||||
WantRebuild |= ImGui::DragInt("Padding", &FontsPadding, 0.1f, 0, 16);
|
||||
if (BuildMode == FontBuildMode_FreeType)
|
||||
{
|
||||
WantRebuild |= ImGui::CheckboxFlags("NoHinting", &FontsFlags, ImGuiFreeType::NoHinting);
|
||||
WantRebuild |= ImGui::CheckboxFlags("NoAutoHint", &FontsFlags, ImGuiFreeType::NoAutoHint);
|
||||
WantRebuild |= ImGui::CheckboxFlags("ForceAutoHint", &FontsFlags, ImGuiFreeType::ForceAutoHint);
|
||||
WantRebuild |= ImGui::CheckboxFlags("LightHinting", &FontsFlags, ImGuiFreeType::LightHinting);
|
||||
WantRebuild |= ImGui::CheckboxFlags("MonoHinting", &FontsFlags, ImGuiFreeType::MonoHinting);
|
||||
WantRebuild |= ImGui::CheckboxFlags("Bold", &FontsFlags, ImGuiFreeType::Bold);
|
||||
WantRebuild |= ImGui::CheckboxFlags("Oblique", &FontsFlags, ImGuiFreeType::Oblique);
|
||||
WantRebuild |= ImGui::CheckboxFlags("Monochrome", &FontsFlags, ImGuiFreeType::Monochrome);
|
||||
}
|
||||
ImGui::End();
|
||||
}
|
||||
};
|
||||
```
|
||||
See https://gist.github.com/ocornut/b3a9ecf13502fd818799a452969649ad
|
||||
|
||||
### Known issues
|
||||
- `cfg.OversampleH`, `OversampleV` are ignored (but perhaps not so necessary with this rasterizer).
|
||||
|
||||
@ -1,25 +1,30 @@
|
||||
// dear imgui: wrapper to use FreeType (instead of stb_truetype)
|
||||
// dear imgui: FreeType font builder (used as a replacement for the stb_truetype builder)
|
||||
// (code)
|
||||
|
||||
// Get latest version at https://github.com/ocornut/imgui/tree/master/misc/freetype
|
||||
// Original code by @vuhdo (Aleksei Skriabin). Improvements by @mikesart. Maintained and v0.60+ by @ocornut.
|
||||
// Original code by @vuhdo (Aleksei Skriabin). Improvements by @mikesart. Maintained since 2019 by @ocornut.
|
||||
|
||||
// Changelog:
|
||||
// - v0.50: (2017/08/16) imported from https://github.com/Vuhdo/imgui_freetype into http://www.github.com/ocornut/imgui_club, updated for latest changes in ImFontAtlas, minor tweaks.
|
||||
// - v0.51: (2017/08/26) cleanup, optimizations, support for ImFontConfig::RasterizerFlags, ImFontConfig::RasterizerMultiply.
|
||||
// - v0.52: (2017/09/26) fixes for imgui internal changes.
|
||||
// - v0.53: (2017/10/22) minor inconsequential change to match change in master (removed an unnecessary statement).
|
||||
// - v0.54: (2018/01/22) fix for addition of ImFontAtlas::TexUvscale member.
|
||||
// - v0.55: (2018/02/04) moved to main imgui repository (away from http://www.github.com/ocornut/imgui_club)
|
||||
// - v0.56: (2018/06/08) added support for ImFontConfig::GlyphMinAdvanceX, GlyphMaxAdvanceX.
|
||||
// - v0.60: (2019/01/10) re-factored to match big update in STB builder. fixed texture height waste. fixed redundant glyphs when merging. support for glyph padding.
|
||||
// - v0.61: (2019/01/15) added support for imgui allocators + added FreeType only override function SetAllocatorFunctions().
|
||||
// - v0.62: (2019/02/09) added RasterizerFlags::Monochrome flag to disable font anti-aliasing (combine with ::MonoHinting for best results!)
|
||||
// - v0.63: (2020/06/04) fix for rare case where FT_Get_Char_Index() succeed but FT_Load_Glyph() fails.
|
||||
// CHANGELOG
|
||||
// (minor and older changes stripped away, please see git history for details)
|
||||
// 2021/01/26: simplified integration by using '#define IMGUI_ENABLE_FREETYPE'.
|
||||
// renamed ImGuiFreeType::XXX flags to ImGuiFreeTypeBuilderFlags_XXX for consistency with other API. removed ImGuiFreeType::BuildFontAtlas().
|
||||
// 2020/06/04: fix for rare case where FT_Get_Char_Index() succeed but FT_Load_Glyph() fails.
|
||||
// 2019/02/09: added RasterizerFlags::Monochrome flag to disable font anti-aliasing (combine with ::MonoHinting for best results!)
|
||||
// 2019/01/15: added support for imgui allocators + added FreeType only override function SetAllocatorFunctions().
|
||||
// 2019/01/10: re-factored to match big update in STB builder. fixed texture height waste. fixed redundant glyphs when merging. support for glyph padding.
|
||||
// 2018/06/08: added support for ImFontConfig::GlyphMinAdvanceX, GlyphMaxAdvanceX.
|
||||
// 2018/02/04: moved to main imgui repository (away from http://www.github.com/ocornut/imgui_club)
|
||||
// 2018/01/22: fix for addition of ImFontAtlas::TexUvscale member.
|
||||
// 2017/10/22: minor inconsequential change to match change in master (removed an unnecessary statement).
|
||||
// 2017/09/26: fixes for imgui internal changes.
|
||||
// 2017/08/26: cleanup, optimizations, support for ImFontConfig::RasterizerFlags, ImFontConfig::RasterizerMultiply.
|
||||
// 2017/08/16: imported from https://github.com/Vuhdo/imgui_freetype into http://www.github.com/ocornut/imgui_club, updated for latest changes in ImFontAtlas, minor tweaks.
|
||||
|
||||
// Gamma Correct Blending:
|
||||
// FreeType assumes blending in linear space rather than gamma space.
|
||||
// See https://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html#FT_Render_Glyph
|
||||
// For correct results you need to be using sRGB and convert to linear space in the pixel shader output.
|
||||
// The default imgui styles will be impacted by this change (alpha values will need tweaking).
|
||||
// About Gamma Correct Blending:
|
||||
// - FreeType assumes blending in linear space rather than gamma space.
|
||||
// - See https://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html#FT_Render_Glyph
|
||||
// - For correct results you need to be using sRGB and convert to linear space in the pixel shader output.
|
||||
// - The default dear imgui styles will be impacted by this change (alpha values will need tweaking).
|
||||
|
||||
// FIXME: cfg.OversampleH, OversampleV are not supported (but perhaps not so necessary with this rasterizer).
|
||||
|
||||
@ -41,6 +46,23 @@
|
||||
#pragma GCC diagnostic ignored "-Wunused-function" // warning: 'xxxx' defined but not used
|
||||
#endif
|
||||
|
||||
//-------------------------------------------------------------------------
|
||||
// Data
|
||||
//-------------------------------------------------------------------------
|
||||
|
||||
// Default memory allocators
|
||||
static void* ImGuiFreeTypeDefaultAllocFunc(size_t size, void* user_data) { IM_UNUSED(user_data); return IM_ALLOC(size); }
|
||||
static void ImGuiFreeTypeDefaultFreeFunc(void* ptr, void* user_data) { IM_UNUSED(user_data); IM_FREE(ptr); }
|
||||
|
||||
// Current memory allocators
|
||||
static void* (*GImGuiFreeTypeAllocFunc)(size_t size, void* user_data) = ImGuiFreeTypeDefaultAllocFunc;
|
||||
static void (*GImGuiFreeTypeFreeFunc)(void* ptr, void* user_data) = ImGuiFreeTypeDefaultFreeFunc;
|
||||
static void* GImGuiFreeTypeAllocatorUserData = NULL;
|
||||
|
||||
//-------------------------------------------------------------------------
|
||||
// Code
|
||||
//-------------------------------------------------------------------------
|
||||
|
||||
namespace
|
||||
{
|
||||
// Glyph metrics:
|
||||
@ -118,7 +140,7 @@ namespace
|
||||
// From SDL_ttf: Handy routines for converting from fixed point
|
||||
#define FT_CEIL(X) (((X + 63) & -64) / 64)
|
||||
|
||||
bool FreeTypeFont::InitFont(FT_Library ft_library, const ImFontConfig& cfg, unsigned int extra_user_flags)
|
||||
bool FreeTypeFont::InitFont(FT_Library ft_library, const ImFontConfig& cfg, unsigned int extra_font_builder_flags)
|
||||
{
|
||||
FT_Error error = FT_New_Memory_Face(ft_library, (uint8_t*)cfg.FontData, (uint32_t)cfg.FontDataSize, (uint32_t)cfg.FontNo, &Face);
|
||||
if (error != 0)
|
||||
@ -131,22 +153,22 @@ namespace
|
||||
SetPixelHeight((uint32_t)cfg.SizePixels);
|
||||
|
||||
// Convert to FreeType flags (NB: Bold and Oblique are processed separately)
|
||||
UserFlags = cfg.RasterizerFlags | extra_user_flags;
|
||||
UserFlags = cfg.FontBuilderFlags | extra_font_builder_flags;
|
||||
LoadFlags = FT_LOAD_NO_BITMAP;
|
||||
if (UserFlags & ImGuiFreeType::NoHinting)
|
||||
if (UserFlags & ImGuiFreeTypeBuilderFlags_NoHinting)
|
||||
LoadFlags |= FT_LOAD_NO_HINTING;
|
||||
if (UserFlags & ImGuiFreeType::NoAutoHint)
|
||||
if (UserFlags & ImGuiFreeTypeBuilderFlags_NoAutoHint)
|
||||
LoadFlags |= FT_LOAD_NO_AUTOHINT;
|
||||
if (UserFlags & ImGuiFreeType::ForceAutoHint)
|
||||
if (UserFlags & ImGuiFreeTypeBuilderFlags_ForceAutoHint)
|
||||
LoadFlags |= FT_LOAD_FORCE_AUTOHINT;
|
||||
if (UserFlags & ImGuiFreeType::LightHinting)
|
||||
if (UserFlags & ImGuiFreeTypeBuilderFlags_LightHinting)
|
||||
LoadFlags |= FT_LOAD_TARGET_LIGHT;
|
||||
else if (UserFlags & ImGuiFreeType::MonoHinting)
|
||||
else if (UserFlags & ImGuiFreeTypeBuilderFlags_MonoHinting)
|
||||
LoadFlags |= FT_LOAD_TARGET_MONO;
|
||||
else
|
||||
LoadFlags |= FT_LOAD_TARGET_NORMAL;
|
||||
|
||||
if (UserFlags & ImGuiFreeType::Monochrome)
|
||||
if (UserFlags & ImGuiFreeTypeBuilderFlags_Monochrome)
|
||||
RenderMode = FT_RENDER_MODE_MONO;
|
||||
else
|
||||
RenderMode = FT_RENDER_MODE_NORMAL;
|
||||
@ -200,9 +222,9 @@ namespace
|
||||
IM_ASSERT(slot->format == FT_GLYPH_FORMAT_OUTLINE);
|
||||
|
||||
// Apply convenience transform (this is not picking from real "Bold"/"Italic" fonts! Merely applying FreeType helper transform. Oblique == Slanting)
|
||||
if (UserFlags & ImGuiFreeType::Bold)
|
||||
if (UserFlags & ImGuiFreeTypeBuilderFlags_Bold)
|
||||
FT_GlyphSlot_Embolden(slot);
|
||||
if (UserFlags & ImGuiFreeType::Oblique)
|
||||
if (UserFlags & ImGuiFreeTypeBuilderFlags_Oblique)
|
||||
{
|
||||
FT_GlyphSlot_Oblique(slot);
|
||||
//FT_BBox bbox;
|
||||
@ -320,7 +342,7 @@ struct ImFontBuildDstDataFT
|
||||
ImBitVector GlyphsSet; // This is used to resolve collision when multiple sources are merged into a same destination font.
|
||||
};
|
||||
|
||||
bool ImFontAtlasBuildWithFreeType(FT_Library ft_library, ImFontAtlas* atlas, unsigned int extra_flags)
|
||||
bool ImFontAtlasBuildWithFreeTypeEx(FT_Library ft_library, ImFontAtlas* atlas, unsigned int extra_flags)
|
||||
{
|
||||
IM_ASSERT(atlas->ConfigData.Size > 0);
|
||||
|
||||
@ -605,50 +627,41 @@ bool ImFontAtlasBuildWithFreeType(FT_Library ft_library, ImFontAtlas* atlas, uns
|
||||
return true;
|
||||
}
|
||||
|
||||
// Default memory allocators
|
||||
static void* ImFreeTypeDefaultAllocFunc(size_t size, void* user_data) { IM_UNUSED(user_data); return IM_ALLOC(size); }
|
||||
static void ImFreeTypeDefaultFreeFunc(void* ptr, void* user_data) { IM_UNUSED(user_data); IM_FREE(ptr); }
|
||||
|
||||
// Current memory allocators
|
||||
static void* (*GImFreeTypeAllocFunc)(size_t size, void* user_data) = ImFreeTypeDefaultAllocFunc;
|
||||
static void (*GImFreeTypeFreeFunc)(void* ptr, void* user_data) = ImFreeTypeDefaultFreeFunc;
|
||||
static void* GImFreeTypeAllocatorUserData = NULL;
|
||||
|
||||
// FreeType memory allocation callbacks
|
||||
static void* FreeType_Alloc(FT_Memory /*memory*/, long size)
|
||||
{
|
||||
return GImFreeTypeAllocFunc((size_t)size, GImFreeTypeAllocatorUserData);
|
||||
return GImGuiFreeTypeAllocFunc((size_t)size, GImGuiFreeTypeAllocatorUserData);
|
||||
}
|
||||
|
||||
static void FreeType_Free(FT_Memory /*memory*/, void* block)
|
||||
{
|
||||
GImFreeTypeFreeFunc(block, GImFreeTypeAllocatorUserData);
|
||||
GImGuiFreeTypeFreeFunc(block, GImGuiFreeTypeAllocatorUserData);
|
||||
}
|
||||
|
||||
static void* FreeType_Realloc(FT_Memory /*memory*/, long cur_size, long new_size, void* block)
|
||||
{
|
||||
// Implement realloc() as we don't ask user to provide it.
|
||||
if (block == NULL)
|
||||
return GImFreeTypeAllocFunc((size_t)new_size, GImFreeTypeAllocatorUserData);
|
||||
return GImGuiFreeTypeAllocFunc((size_t)new_size, GImGuiFreeTypeAllocatorUserData);
|
||||
|
||||
if (new_size == 0)
|
||||
{
|
||||
GImFreeTypeFreeFunc(block, GImFreeTypeAllocatorUserData);
|
||||
GImGuiFreeTypeFreeFunc(block, GImGuiFreeTypeAllocatorUserData);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (new_size > cur_size)
|
||||
{
|
||||
void* new_block = GImFreeTypeAllocFunc((size_t)new_size, GImFreeTypeAllocatorUserData);
|
||||
void* new_block = GImGuiFreeTypeAllocFunc((size_t)new_size, GImGuiFreeTypeAllocatorUserData);
|
||||
memcpy(new_block, block, (size_t)cur_size);
|
||||
GImFreeTypeFreeFunc(block, GImFreeTypeAllocatorUserData);
|
||||
GImGuiFreeTypeFreeFunc(block, GImGuiFreeTypeAllocatorUserData);
|
||||
return new_block;
|
||||
}
|
||||
|
||||
return block;
|
||||
}
|
||||
|
||||
bool ImGuiFreeType::BuildFontAtlas(ImFontAtlas* atlas, unsigned int extra_flags)
|
||||
static bool ImFontAtlasBuildWithFreeType(ImFontAtlas* atlas)
|
||||
{
|
||||
// FreeType memory management: https://www.freetype.org/freetype2/docs/design/design-4.html
|
||||
FT_MemoryRec_ memory_rec = {};
|
||||
@ -666,15 +679,22 @@ bool ImGuiFreeType::BuildFontAtlas(ImFontAtlas* atlas, unsigned int extra_flags)
|
||||
// If you don't call FT_Add_Default_Modules() the rest of code may work, but FreeType won't use our custom allocator.
|
||||
FT_Add_Default_Modules(ft_library);
|
||||
|
||||
bool ret = ImFontAtlasBuildWithFreeType(ft_library, atlas, extra_flags);
|
||||
bool ret = ImFontAtlasBuildWithFreeTypeEx(ft_library, atlas, atlas->FontBuilderFlags);
|
||||
FT_Done_Library(ft_library);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
const ImFontBuilderIO* ImGuiFreeType::GetBuilderForFreeType()
|
||||
{
|
||||
static ImFontBuilderIO io;
|
||||
io.FontBuilder_Build = ImFontAtlasBuildWithFreeType;
|
||||
return &io;
|
||||
}
|
||||
|
||||
void ImGuiFreeType::SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data)
|
||||
{
|
||||
GImFreeTypeAllocFunc = alloc_func;
|
||||
GImFreeTypeFreeFunc = free_func;
|
||||
GImFreeTypeAllocatorUserData = user_data;
|
||||
GImGuiFreeTypeAllocFunc = alloc_func;
|
||||
GImGuiFreeTypeFreeFunc = free_func;
|
||||
GImGuiFreeTypeAllocatorUserData = user_data;
|
||||
}
|
||||
|
||||
@ -1,36 +1,42 @@
|
||||
// dear imgui: wrapper to use FreeType (instead of stb_truetype)
|
||||
// Get latest version at https://github.com/ocornut/imgui/tree/master/misc/freetype
|
||||
// Original code by @Vuhdo (Aleksei Skriabin), maintained by @ocornut
|
||||
// dear imgui: FreeType font builder (used as a replacement for the stb_truetype builder)
|
||||
// (headers)
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "imgui.h" // IMGUI_API, ImFontAtlas
|
||||
#include "imgui.h" // IMGUI_API
|
||||
|
||||
// Forward declarations
|
||||
struct ImFontAtlas;
|
||||
struct ImFontBuilderIO;
|
||||
|
||||
// Hinting greatly impacts visuals (and glyph sizes).
|
||||
// - By default, hinting is enabled and the font's native hinter is preferred over the auto-hinter.
|
||||
// - When disabled, FreeType generates blurrier glyphs, more or less matches the stb_truetype.h
|
||||
// - The Default hinting mode usually looks good, but may distort glyphs in an unusual way.
|
||||
// - The Light hinting mode generates fuzzier glyphs but better matches Microsoft's rasterizer.
|
||||
// You can set those flags globaly in ImFontAtlas::FontBuilderFlags
|
||||
// You can set those flags on a per font basis in ImFontConfig::FontBuilderFlags
|
||||
enum ImGuiFreeTypeBuilderFlags
|
||||
{
|
||||
ImGuiFreeTypeBuilderFlags_NoHinting = 1 << 0, // Disable hinting. This generally generates 'blurrier' bitmap glyphs when the glyph are rendered in any of the anti-aliased modes.
|
||||
ImGuiFreeTypeBuilderFlags_NoAutoHint = 1 << 1, // Disable auto-hinter.
|
||||
ImGuiFreeTypeBuilderFlags_ForceAutoHint = 1 << 2, // Indicates that the auto-hinter is preferred over the font's native hinter.
|
||||
ImGuiFreeTypeBuilderFlags_LightHinting = 1 << 3, // A lighter hinting algorithm for gray-level modes. Many generated glyphs are fuzzier but better resemble their original shape. This is achieved by snapping glyphs to the pixel grid only vertically (Y-axis), as is done by Microsoft's ClearType and Adobe's proprietary font renderer. This preserves inter-glyph spacing in horizontal text.
|
||||
ImGuiFreeTypeBuilderFlags_MonoHinting = 1 << 4, // Strong hinting algorithm that should only be used for monochrome output.
|
||||
ImGuiFreeTypeBuilderFlags_Bold = 1 << 5, // Styling: Should we artificially embolden the font?
|
||||
ImGuiFreeTypeBuilderFlags_Oblique = 1 << 6, // Styling: Should we slant the font, emulating italic style?
|
||||
ImGuiFreeTypeBuilderFlags_Monochrome = 1 << 7 // Disable anti-aliasing. Combine this with MonoHinting for best results!
|
||||
};
|
||||
|
||||
namespace ImGuiFreeType
|
||||
{
|
||||
// Hinting greatly impacts visuals (and glyph sizes).
|
||||
// When disabled, FreeType generates blurrier glyphs, more or less matches the stb's output.
|
||||
// The Default hinting mode usually looks good, but may distort glyphs in an unusual way.
|
||||
// The Light hinting mode generates fuzzier glyphs but better matches Microsoft's rasterizer.
|
||||
// This is automatically assigned when using '#define IMGUI_ENABLE_FREETYPE'.
|
||||
// If you need to dynamically select between multiple builders:
|
||||
// - you can manually assign this builder with 'atlas->FontBuilderIO = ImGuiFreeType::GetBuilderForFreeType()'
|
||||
// - prefer deep-copying this into your own ImFontBuilderIO instance if you use hot-reloading that messes up static data.
|
||||
IMGUI_API const ImFontBuilderIO* GetBuilderForFreeType();
|
||||
|
||||
// You can set those flags on a per font basis in ImFontConfig::RasterizerFlags.
|
||||
// Use the 'extra_flags' parameter of BuildFontAtlas() to force a flag on all your fonts.
|
||||
enum RasterizerFlags
|
||||
{
|
||||
// By default, hinting is enabled and the font's native hinter is preferred over the auto-hinter.
|
||||
NoHinting = 1 << 0, // Disable hinting. This generally generates 'blurrier' bitmap glyphs when the glyph are rendered in any of the anti-aliased modes.
|
||||
NoAutoHint = 1 << 1, // Disable auto-hinter.
|
||||
ForceAutoHint = 1 << 2, // Indicates that the auto-hinter is preferred over the font's native hinter.
|
||||
LightHinting = 1 << 3, // A lighter hinting algorithm for gray-level modes. Many generated glyphs are fuzzier but better resemble their original shape. This is achieved by snapping glyphs to the pixel grid only vertically (Y-axis), as is done by Microsoft's ClearType and Adobe's proprietary font renderer. This preserves inter-glyph spacing in horizontal text.
|
||||
MonoHinting = 1 << 4, // Strong hinting algorithm that should only be used for monochrome output.
|
||||
Bold = 1 << 5, // Styling: Should we artificially embolden the font?
|
||||
Oblique = 1 << 6, // Styling: Should we slant the font, emulating italic style?
|
||||
Monochrome = 1 << 7 // Disable anti-aliasing. Combine this with MonoHinting for best results!
|
||||
};
|
||||
|
||||
IMGUI_API bool BuildFontAtlas(ImFontAtlas* atlas, unsigned int extra_flags = 0);
|
||||
|
||||
// By default ImGuiFreeType will use IM_ALLOC()/IM_FREE().
|
||||
// However, as FreeType does lots of allocations we provide a way for the user to redirect it to a separate memory heap if desired:
|
||||
IMGUI_API void SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data = NULL);
|
||||
// Override allocators. By default ImGuiFreeType will use IM_ALLOC()/IM_FREE()
|
||||
// However, as FreeType does lots of allocations we provide a way for the user to redirect it to a separate memory heap if desired.
|
||||
IMGUI_API void SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data = NULL);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user