Version 1.50

Using ImTextureID instead of void* in ImFontAtlas, not sure why I didn't do that earlier, make things more clear

Further clarifications of the key indices passed to IsKeyXXX functions (#1159)

ImFontConfig: Removed MergeGlyphCenterV in favor of a more multipurpose ImFontConfig::GlyphOffset. (Breaking change)

ImFontConfig: Added GlyphOffset to explicitely offset glyphs at font build time, useful for merged fonts. May remove MergeGlyphCenterV soon.

Renamed ImDrawList::PathFill() to ImDrawList::PathFillConvex() for clarity. (breaking API)

ImDrawList::AddImage* renamed uv_ parameters to be more consistent. Fix AddImageQuad to use IM_COL32_A_MASK (#1009)

Add ImDrawList::AddImageQuad ...

Adds a function
  AddImageQuad(user_texture_id, a, b, c, d, uva, uvb, uvc, uvd, col)
that shows a texture on a full quad. This allows showing arbitrary
rotations of a texture.

do not export inline function, it causes problems on some compiers

missing API

ImFont: Store the texture surface used to get an idea of how costly each font is.

Comment about ImGuiInputTextFlags_CtrlEnterForNewLine for InputTextMultiline()

Minor comments (#998)

Comments (#972)

Comments, clarified use of io.MouseDelta (#942) ...

(ImGuiIO structure layout changed)

const correctness for Combo and ListBox ...

Since Combo and ListBox only read and display the list of items, they
should not modify the pointers inside the array of pointers passed in.
Adding "const" here makes it possible to call these functions with such
an array of const pointers. Previously, a cast to "const char**" was
required as a workaround, otherwise there was a compile error.

Font: Added io.FontDefault in ImGuiIO structure to make it easier to change default font from third-party or demo code

Added a void* user_data parameter to Clipboard function handlers. (#875)

Minor comments

Added ImGuiMouseCursor_None for usage by app/binding

ImDrawList: AddRect(), PathRect() default rounded_corner 0x0F->~0/-1 so it appears less obscure in IDE completions

ImDrawList: Uses IM_COL32_A_MASK macro instead of hardcoded zero alpha testing (#844)

Minor tidying up following merge BGRA color PR (#844)

Apply Omar feedback and convert remaining 0xAABBGGRR's into IM_COL32(RR,GG,BB,AA) format.

Introduce IMGUI_USE_BGRA_PACKED_COLOR in imconfig.h. ...

When IMGUI_USE_BGRA_PACKED_COLOR is defined packed color hold in ImU32 use BGRA format instead RGBA.

Style: Added ButtonTextAlign, ImGuiStyleVar_ButtonTextAlign (#842)

Refactor text alignment options to use ImVec2, removed ImGuiAlign (#842, #222)

Refactor PushStyleVar/PopStyleVar so it is constant time + can receive integers (yet unused) (#842)

Fixing minor english typos (#827)

Removed a handful of obsolete (trivial) function redirection from 1.34 and 1.38 (march-april 2015) ...

OpenNextNode() -> SetNextTreeNodeOpen()
GetWindowIsFocused() -> IsWindowFocused()
GetItemBoxMin() -> GetItemRectMin()
GetItemBoxMax() -> GetItemRectMax()
IsMouseHoveringBox() -> IsMouseHoveringRect()
IsClipped() -> !IsRectVisible()