Version 1.52

ImFontAtlas: Fixed memory leak if stbtt_InitFont() returned false. (#1391)

Font: Renamed ImFont::Clear() to ImFont::ClearOutputData() for consistency with what ImFontAtlas does. DisplayOffset is set by constructor but not reset by ClearOutputData. (#1349)

Merge branch 'atlas_build_clear_font' of https://github.com/inolen/imgui into inolen-atlas_build_clear_font

Internals: PaintVerts** renamed to ShadeVerts**, moved to imgui_draw.cpp and exposed in imgui_internal.h (+1 squashed commits)

ImDrawList: Fixed a bug in ChannelsMerge() leading to an extraneous draw call being created, which unexpectly led to more dramatic condition but to faulty draw command merging code. (#1172, #1368)

Rendering issue fix ...

Fixes ocornut/imgui#1172

Completely clear font when rebuilding atlas. ...

Previously, IndexLookup was not cleared on each font, causing FindGlyph to return old glyphs when using MergeMode.

ImFontAtlas: Fixed calling Clear() and rebuilding (broken in 3fe2ecf) thanks @pdoane @mikesart

ImFontAtlas: Added support for CustomRect API to submit custom rectangles to be packed into the atlas / and map them as font glyphs

ImFont: Renamed (supposedly internal) fields (e.g. XAdvance to AdvanceX). Custom text renderers might be affected if they didn't use the GetCharAdvance() helper function.

ImFont: Renamed ImFont::Glyph to ImFontGlyph (for consistency and so ImFontAtlas types can use it without ordering half of the file). Left a redirection type.

ImFontAtlas: Refactored internals API to 1) avoid building lookup table multiple times for merged fonts + 2) allow the mapping of custom icons inside fonts (wip, uncommited)

ImFontAtlas: Comments and minor reorganization of declaration in header file.

ImFont: Split some building code into a AddGlyph() helper (that custom rect code and imgui_freetype can use)

Merge pull request #1324 from waywardmonkeys/improve-clang-warnings ...

FIxes zealous Clang warning.

Merge branch 'master' into styles

Improve warning configuration for clang. ...

Clang 4.0 introduced -Wdouble-promotion, so check for and disable
that on clang as we do on gcc.

The old style casts warning is already disabled globally in this file
for clang, so it doesn't need to be re-disabled within this scope.

Fixed alloca include for SunOS (#1319)

Don't do a bunch of OS gymnastics. alloca.h is only for glibc, everyone else uses stdlib.h

RenderRectFilledRangeH() can't use cheap acosf() approximation for now. (#1296)

Added overcomplicated RenderRectFilledRangeH() to fix rounded progress bar, which will also help for range widgets and perhaps sliders grabs over rounded areas. (#1296, #76)

ImDrawList: Minor renaming

imDrawList: PathArcTo() returns when passed zero radius.

ImDrawList: Minor tidying up.

Internals: Renamed some ImGuiCorner enums.

ImFontConfig: Added RasterizerMultiply option to alter the brightness of individual fonts at rasterization time, which may help increasing readability for some. Added RasterizerFlags for custom rasterizer flags (aka imgui_freetype)

ImFontConfig: Comments, const.

Version 1.52 WIP

Version 1.51