This is a redesign on font loading, missing glyphs are skipped instead of falling back to font `.notdef` special character (usually "tofu" character).
It is changed because not all fonts support a fallback glyph.
One improvement could be allowing users to define a custom fallback character, for example `?` glyph.
* Ignore unused return value of GetCodepointNext in GetCodepointCount
Removes the last warning from non-external libraries when compiling with
the default build configuration on x64 Linux.
* Remove unnecessary void cast in GetCodepointCount
Support creating a 3x3 pixels white rectangle at the bottom-right corner of the generated font atlas image, useful for shapes+text drawing in a single draw call!
* Fix GetCodepointNext to return default value with size=0 on invalid input. Modify LoadCodepoints to work when GetCodepointNext returns a size of 0. All internal use of GetCodepointNext and GetCodepointPrev checked. This fix may break external code dealing with invalid input as the old code erroneously never returned a size of 0, external code that doesn't properly check for size=0 may endlessly loop or overflow a buffer on invalid input.
* Change default behaviour of GetCodepointNext to return a size of 1 instead of 0. This matches existing prod behaviour and guarantees size 1..4 is returned. Simplify internal code that uses GetCodepointNext that previously had to account for size=0.
* Simplified progressing through a UTF-8 string in ImageTextEx and MeasureTextEx. This change matches existing precedent in DrawTextEx
* GetCodepointNext: Add 10xxxxxx checks to multibyte encodings.
---------
Co-authored-by: anon <anon>
Basic packing algorithm currently follows this order: Copy pixel data -> Move offsetX for current glyph -> Check remaining space for current glyph...
Since X offset already moved according current glyph, remaining space should be checked for next glyph. Because of this, occasionally, current logic causes glyphs wrapping around texture.
Proposed fix accomplishes that by moving offsetX check to the beginning of the loop.
