89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
#include <TeX/TeX.h>
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#include <TeX/node.h>
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#include <TeX/flow.h>
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#include <TeX/env.h>
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#include <TeX/defs.h>
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#include <TeX/interface.h>
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#include <stdlib.h>
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#include <string.h>
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//---
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// Interface functions
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//---
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/* Rendering-related interface functions */
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void (*TeX_pixel)(int x, int y, int color) = NULL;
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void (*TeX_line)(int x1, int y1, int x2, int y2, int color) = NULL;
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void (*TeX_size)(char const *str, int *width, int *height) = NULL;
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void (*TeX_text)(char const *str, int x, int y, int color) = NULL;
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/* TeX_intf_pixel(): Set a single pixel */
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void TeX_intf_pixel(void (*draw_pixel)(int x, int y, int color))
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{
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TeX_pixel = draw_pixel;
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}
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/* TeX_intf_line(): Draw a line */
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void TeX_intf_line(void (*draw_line)(int x1, int y1, int x2, int y2,
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int color))
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{
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TeX_line = draw_line;
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}
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/* TeX_intf_size(): Get the dimensions of a string */
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void TeX_intf_size(void (*text_size)(char const *str, int *width,int *height))
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{
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TeX_size = text_size;
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}
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/* TeX_intf_text(): Draw variable-width text */
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void TeX_intf_text(void (*draw_text)(char const *str, int x, int y,int color))
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{
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TeX_text = draw_text;
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}
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//---
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// Object management
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//---
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/* TeX_free(): Free an allocated TeX formula */
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void TeX_free(struct TeX_Env *env)
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{
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if(env) env->free(env);
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}
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//---
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// Module functions
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//---
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/* TeX_parse(): Parse a TeX formula */
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struct TeX_Env *TeX_parse(char const *formula)
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{
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/* Provided by the parser. */
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struct TeX_Env *parse(char const *str);
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struct TeX_Env *env = parse(formula);
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if(!env) return NULL;
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env->layout(env);
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return env;
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}
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/* TeX_draw(): Render a parsed formula */
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void TeX_draw(struct TeX_Env *formula, int x, int y, int color)
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{
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formula->render(formula, x, y, color);
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}
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/* TeX_interpret(): Parse and render, in sequence */
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void TeX_interpret(char const *formula, int x, int y, int color)
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{
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struct TeX_Env *env = TeX_parse(formula);
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if(!env) return;
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TeX_draw(env, x, y, color);
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TeX_free(env);
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}
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