Reserve space for a number of vertices and indices. You must finish filling your reserved data before calling PrimReserve() again, as it may reallocat

Push a clipping rectangle for both ImGui logic (hit-testing etc.) and low-level ImDrawList rendering. - When using this function it is sane to ensure

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Copy a std::string to the aiString */

Note: see https://software.intel.com/en-us/articles/a-common-construct-to-avoid-the-contention-of-threads-architecture-agnostic-spin-wait-loops

Initialize before use in a new frame. We always have a command ready in the buffer.

TODO: maybe default options should count towards the number of arguments

optimized variant of frexp

"Insert" two 0 bits after each of the 10 low bits of x

half-space fixed point triangle rasterizer

move cursor to last character of selection

level may actually range from [0,10] (10 is a "hidden" max level, where we want a bit more compression and it's fine if throughput to fall off a cliff

x0/y0/x1/y1 are offset from the character upper-left layout position, in pixels. Therefore x0/y0 are often fairly close to zero. Not to be mistaken wi

TODO: Thickness anti-aliased lines cap are missing their AA fringe. We avoid using the ImVec2 math operators here to reduce cost to a minimum for debu

Layer is locked for the root window, however child windows may use a different viewport (e.g. extruding menu)

Use case A: Begin() called from constructor with items_height<0, then called again from Sync() in StepNo 1 Use case B: Begin() called from constructor

Passing a mouse button to ImGuiPopupFlags is legal

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