Merge pull request #1080 from SaschaWillems/master ...

Examples: Vulkan: Small changes to be in line with specs and fix validation layer errors/warnings

Examples: SDL2: Added build .bat files for win32.

Ignoring unreasonnable Clang -wformat-pedantic warning (#1090) ...

See e.g.
http://clang-developers.42468.n3.nabble.com/The-p-conversion-and-cast-to-void-td4044226.html

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

Merge branch 'ecraven-addimagequad'

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

Merge branch 'addimagequad' of https://github.com/ecraven/imgui into ecraven-addimagequad

Merge branch 'greggman-fix-opengl3-example'

Examples: SDL2+GL3: Fix blend func state save/restore (#1120)

Fix blend func state save/restore ...

AFAIK there's no such enum as `GL_BLEND_SRC` or `GL_BLEND_DST` in OpenGL3 and OpenGL4.

Maybe they're left over from previous versions? They don't even seem to exist in OpenGL 2.1. In fact checking they were deprecated in OpenGL 1.5 (they exist in 1.3)

End() avoid calling Columns() if no columns set is open, not sure what it wasn't the case. ...

Pros: Faster. Avoid early crashes StackId underflow that are meant to be more gracefully caught by CheckStacksSize() (with more explicit assert). Cons: Excercise less code.

Clarified asserts in CheckStacksSize() when there is a stack mismatch

Update README.md

Update README.md

Update README.md

Added UnrealEngine_ImGui link

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.

imconfig: Added comment about redefining ImDrawIdx

Comments to redirect people to OpenGL3 examples (#1116)

Examples: GLFW+GL3, SDL+GL3: Fixed modifying bound Texture0 (#1087, #1088, #1116)

Added assert/comment about using MergeMode (#1100)

Update README.md

Comments about child menu positioning (#1086)

Merge pull request #1078 from nem0/master ...

Added missing IMGUI_API macros in ImGuiTextEditCallbackData methods.

Clip negative scissor offsets to zero

Set required depth member for buffer image copy

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.

ImFont: Reorder field initialization to match declaration order