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#include "mupdf/fitz.h"
#include "svg-imp.h"
#include <string.h>
#include <math.h>
int svg_is_whitespace_or_comma(int c)
{
return (c == 0x20) || (c == 0x9) || (c == 0xD) || (c == 0xA) || (c == ',');
}
int svg_is_whitespace(int c)
{
return (c == 0x20) || (c == 0x9) || (c == 0xD) || (c == 0xA);
}
int svg_is_alpha(int c)
{
return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
}
int svg_is_digit(int c)
{
return (c >= '0' && c <= '9') ||
(c == 'e') || (c == 'E') ||
(c == '+') || (c == '-') || (c == '.');
}
const char *
svg_lex_number(float *fp, const char *ss)
{
const char *s = ss;
if (*s == '-')
++s;
while (*s >= '0' && *s <= '9')
++s;
if (*s == '.') {
++s;
while (*s >= '0' && *s <= '9')
++s;
}
if (*s == 'e' || *s == 'E') {
++s;
if (*s == '+' || *s == '-')
++s;
while (*s >= '0' && *s <= '9')
++s;
}
*fp = fz_atof(ss);
return s;
}
float
svg_parse_number(const char *str, float min, float max, float inherit)
{
float x;
if (!strcmp(str, "inherit"))
return inherit;
x = fz_atof(str);
if (x < min) return min;
if (x > max) return max;
return x;
}
/* Return length/coordinate in points */
float
svg_parse_length(const char *str, float percent, float font_size)
{
char *end;
float val;
val = fz_strtof(str, &end);
if (end == str)
return 0; /* failed */
if (!strcmp(end, "px")) return val;
if (!strcmp(end, "pt")) return val * 1.0f;
if (!strcmp(end, "pc")) return val * 12.0f;
if (!strcmp(end, "mm")) return val * 2.83464567f;
if (!strcmp(end, "cm")) return val * 28.3464567f;
if (!strcmp(end, "in")) return val * 72.0f;
if (!strcmp(end, "em")) return val * font_size;
if (!strcmp(end, "ex")) return val * font_size * 0.5f;
if (!strcmp(end, "%"))
return val * percent * 0.01f;
if (end[0] == 0)
return val;
return 0;
}
/* Return angle in degrees */
float
svg_parse_angle(const char *str)
{
char *end;
float val;
val = fz_strtof(str, &end);
if (end == str)
return 0; /* failed */
if (!strcmp(end, "deg"))
return val;
if (!strcmp(end, "grad"))
return val * 0.9f;
if (!strcmp(end, "rad"))
return val * FZ_RADIAN;
return val;
}
/* Coordinate transformations */
fz_matrix
svg_parse_transform(fz_context *ctx, svg_document *doc, const char *str, fz_matrix transform)
{
char keyword[20];
int keywordlen;
float args[6];
int nargs;
nargs = 0;
keywordlen = 0;
while (*str)
{
while (svg_is_whitespace_or_comma(*str))
str ++;
if (*str == 0)
break;
/*
* Parse keyword and opening parenthesis.
*/
keywordlen = 0;
while (svg_is_alpha(*str) && keywordlen < sizeof(keyword) - 1)
keyword[keywordlen++] = *str++;
keyword[keywordlen] = 0;
if (keywordlen == 0)
fz_throw(ctx, FZ_ERROR_SYNTAX, "expected keyword in transform attribute");
while (svg_is_whitespace(*str))
str ++;
if (*str != '(')
fz_throw(ctx, FZ_ERROR_SYNTAX, "expected opening parenthesis in transform attribute");
str ++;
/*
* Parse list of numbers until closing parenthesis
*/
nargs = 0;
while (*str && *str != ')' && nargs < 6)
{
while (svg_is_whitespace_or_comma(*str))
str ++;
if (svg_is_digit(*str))
str = svg_lex_number(&args[nargs++], str);
}
if (*str != ')')
fz_throw(ctx, FZ_ERROR_SYNTAX, "expected closing parenthesis in transform attribute");
str ++;
/*
* Execute the transform.
*/
if (!strcmp(keyword, "matrix"))
{
fz_matrix m;
if (nargs != 6)
fz_throw(ctx, FZ_ERROR_SYNTAX, "wrong number of arguments to matrix(): %d", nargs);
m.a = args[0];
m.b = args[1];
m.c = args[2];
m.d = args[3];
m.e = args[4];
m.f = args[5];
transform = fz_concat(transform, m);
}
else if (!strcmp(keyword, "translate"))
{
if (nargs != 2)
fz_throw(ctx, FZ_ERROR_SYNTAX, "wrong number of arguments to translate(): %d", nargs);
transform = fz_pre_translate(transform, args[0], args[1]);
}
else if (!strcmp(keyword, "scale"))
{
if (nargs == 1)
transform = fz_pre_scale(transform, args[0], args[0]);
else if (nargs == 2)
transform = fz_pre_scale(transform, args[0], args[1]);
else
fz_throw(ctx, FZ_ERROR_SYNTAX, "wrong number of arguments to scale(): %d", nargs);
}
else if (!strcmp(keyword, "rotate"))
{
if (nargs != 1)
fz_throw(ctx, FZ_ERROR_SYNTAX, "wrong number of arguments to rotate(): %d", nargs);
transform = fz_pre_rotate(transform, args[0]);
}
else if (!strcmp(keyword, "skewX"))
{
fz_matrix m;
if (nargs != 1)
fz_throw(ctx, FZ_ERROR_SYNTAX, "wrong number of arguments to skewX(): %d", nargs);
m.a = 1;
m.b = 0;
m.c = tanf(args[0] * FZ_DEGREE);
m.d = 1;
m.e = 0;
m.f = 0;
transform = fz_concat(transform, m);
}
else if (!strcmp(keyword, "skewY"))
{
fz_matrix m;
if (nargs != 1)
fz_throw(ctx, FZ_ERROR_SYNTAX, "wrong number of arguments to skewY(): %d", nargs);
m.a = 1;
m.b = tanf(args[0] * FZ_DEGREE);
m.c = 0;
m.d = 1;
m.e = 0;
m.f = 0;
transform = fz_concat(transform, m);
}
else
{
fz_throw(ctx, FZ_ERROR_SYNTAX, "unknown transform function: %s", keyword);
}
}
return transform;
}
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