Exposed ImDrawCornerFlags, replaced occurences of ~0 with an explicit ImDrawCornerFlags_All. Inversed BotLeft (prev 1<<3, now 1<<2) and BotRight (prev 1<<2, now 1<<3).

Color picker: Tweak vertex shading code, since we aren't shading between PrimReserve and PrimVert the code can be expressed more naturally. (#346)

Fix for drag and drop branch.

Merge branch 'master' into drag_and_drop

Style, Begin: removed ImGuiWindowFlags_ShowBorders window flag. Borders are now fully set up in the ImGuiStyle structure (see e.g. style.FrameBorderSize, style.WindowBorderSize). Use ImGui::ShowStyleEditor() to look them up. (#707, fix #819, #1031, ref #1019, ref #447)

Reorder fields for consistency.

Style: renamed ImGuiCol_ChildWindowBg to ImGuiCol_ChildBg. (#707)

NewFrame() now asserts if neither Render or EndFrame have been called. Exposed EndFrame(). Made it legal to call EndFrame() more than one. (#1423 etc.)

NewFrame(): using literal strings in the most-frequently firing IM_ASSERT expression to increase the odd of programmers seeing them (especially those who don't use a debugger).

Merge branch 'master' into drag_and_drop

Combo: Offset popup position by border size so that a double border isn't so visible. (#707)

Style: Added PopupRounding setting. (#1112)

Fix IsItemHovered() returning true for non-title bar hidden items that are clipped due to window collapsing logic. Fix 27fd1b9. (#823)

Internals: Renamed ImGuiWindow::Accessed to WriteAccessed.

Style: Removed ImGuiCol_ComboBg in favor of combo boxes using ImGuiCol_PopupBg for consistency. (#707)

Internals: Window minor internal renaming + added WindowRounding latch.

Style: renamed style.ChildWindowRounding to style.ChildRounding, ImGuiStyleVar_ChildWindowRounding to ImGuiStyleVar_ChildRounding.

Style: ScaleAllSizes() helper rounds down every values so they are aligned on integers.

Columns: Added ImGuiColumnsFlags_GrowParentContentsSize to internal API to restore old content sizes behavior. (#1444, #125)

Merge branch 'master' into drag_and_drop

Internals: Updating condition/allow flags with a function.

Internals: Window: Store whether the windows has a close button (we need that info for window/tabs dropping preview calculation)

Internals: Added BringWindowToFront(), BringWindowToBack() helpers.

Windows with MenuBar have a larger minimum height to avoid artefacts (I fixed most of the vertical/horizontal artefacts, but the ones in rounded corners were too hard to fix).

Menu: Fixed minor rendering issues on the right size with rounded window when resizing a window small.

Scrollbar: Minor graphical fix for when scrollbar don't have enough visible space to display the full grab.

Minor comments, tweaks

Make it possible to use SetNextWindowPos() on a child window. Useful internally.

Merge branch 'master' into drag_and_drop

Made it guaranteed by API that after calling Begin() the last Item represent the title bar. (#823)