reset the state to default

API cut: delete selection

discard the oldest entry in the redo list--it's bad if this ever happens, but because undo & redo have to store the actual characters in different cas

API drag: on mouse drag, move the cursor and selection endpoint to the clicked location

API initialize

API key: process a keyboard input

API paste: replace existing selection with passed-in text

stb_textedit internally allows for a single undo record to do addition and deletion, but somehow, calling the stb_textedit_paste() function creates tw

returns number of contours

rects array must be big enough to accommodate all characters in the given ranges

note: this routine clips fills that extend off the edges... ideally this wouldn't happen, but it could happen if the truetype glyph bounding boxes are

x^3 + c*x^2 + b*x + a = 0

tessellate until threshold p is happy... @TODO warped to compensate for non-linear stretching

Computes middle 64 bits of multiplication of a 64-bit unsigned integer and a 128-bit unsigned integer.

Computes upper 64 bits of multiplication of a 64-bit unsigned integer and a 128-bit unsigned integer.

Computes lower 64 bits of multiplication of a 32-bit unsigned integer and a 64-bit unsigned integer.

Computes upper 32 bits of multiplication of a 32-bit unsigned integer and a 64-bit unsigned integer.

A public domain branchless UTF-8 decoder by Christopher Wellons: https://github.com/skeeto/branchless-utf8 Decode the next character, c, from s, repor

Set bit n in the array

No specific ordering/dependency support, will see as needed

We intentionally avoid using ImVec2 and its math operators here to reduce cost to a minimum for debug/non-inlined builds.

Load embedded ProggyClean.ttf at size 13, disable oversampling