fx9860g and fxcg50 2D math rendering library with support for TeX syntax.
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//---
// flow: Horizontal flows of nodes arranged from left to right
//---
#ifndef TEX_FLOW
#define TEX_FLOW
#include <stdint.h>
struct TeX_Node;
/* TeX_Flow
This object represents a horizontal line of nodes following the flow of the
text; each node can be a plain string or a functional node. All share the
same base line when rendered. */
struct TeX_Flow
{
/* Pointer to first and last elements of the line */
struct TeX_Node *first;
struct TeX_Node *last;
uint16_t width;
uint16_t height;
uint16_t line;
};
/* Possible subscript and superscript mode.
TEX_FLOW_INLINE:
Subscripts and superscripts are placed on the right of the base, and
displaced vertically. (LaTeX's inline mode)
TEX_FLOW_DISPLAY:
Subscripts and superscripts are placed under and above the base. (LaTeX's
display mode)
TEX_FLOW_PREFER_DISPLAY:
Use display mode when possible, but fall back to inline mode if the user
builds an inline mode. */
#define TEX_FLOW_INLINE 0
#define TEX_FLOW_DISPLAY 1
#define TEX_FLOW_PREFER_DISPLAY 2
//---
// Flow construction and destruction functions
//---
/* TeX_flow_add_node(): Add a new node to a flow
The provided node is added at the right of the flow. If [flow] is NULL,
creates and returns a new flow. Otherwise, always returns [flow]. */
struct TeX_Flow *TeX_flow_add_node(struct TeX_Flow *flow,
struct TeX_Node *node);
/* TeX_flow_free(): Free TeX_Flow objects
Destroys a flow and all of its contained elements. */
void TeX_flow_free(struct TeX_Flow *flow);
//---
// Layout and rendering
//---
/* TeX_flow_layout(): Calculate the layout of a flow
This function calculates the size taken by nodes sharing the same baseline.
It heeds for special size and alignment exceptions such as parenthesis-type
characters and subscripts/superscripts. Modifies the flow's metadata. */
void TeX_flow_layout(struct TeX_Flow *flow, int display);
/* TeX_flow_render(): Render a flow and all its components
This function renders all horizontal objects in a flow. The layout of the
flow must have been computed. */
void TeX_flow_render(struct TeX_Flow const * flow, int x, int y, int color);
#endif /* TEX_FLOW */