diff options
Diffstat (limited to 'svgtiny.c')
| -rw-r--r-- | svgtiny.c | 138 |
1 files changed, 74 insertions, 64 deletions
@@ -879,83 +879,93 @@ void svgtiny_parse_font_attributes(const xmlNode *node, void svgtiny_parse_transform_attributes(xmlNode *node, struct svgtiny_parse_state *state) { - char *transform, *s; + char *transform; + + /* parse transform */ + transform = (char *) xmlGetProp(node, (const xmlChar *) "transform"); + if (transform) { + svgtiny_parse_transform(transform, &state->ctm.a, &state->ctm.b, + &state->ctm.c, &state->ctm.d, + &state->ctm.e, &state->ctm.f); + xmlFree(transform); + } +} + + +/** + * Parse a transform string. + */ + +void svgtiny_parse_transform(char *s, float *ma, float *mb, + float *mc, float *md, float *me, float *mf) +{ float a, b, c, d, e, f; - float ctm_a, ctm_b, ctm_c, ctm_d, ctm_e, ctm_f; + float za, zb, zc, zd, ze, zf; float angle, x, y; int n; - /* parse transform */ - s = transform = (char *) xmlGetProp(node, - (const xmlChar *) "transform"); - if (transform) { - for (unsigned int i = 0; transform[i]; i++) - if (transform[i] == ',') - transform[i] = ' '; - - while (*s) { - a = d = 1; - b = c = 0; - e = f = 0; - if (sscanf(s, "matrix (%f %f %f %f %f %f) %n", + for (unsigned int i = 0; s[i]; i++) + if (s[i] == ',') + s[i] = ' '; + + while (*s) { + a = d = 1; + b = c = 0; + e = f = 0; + if (sscanf(s, "matrix (%f %f %f %f %f %f) %n", &a, &b, &c, &d, &e, &f, &n) == 6) - ; - else if (sscanf(s, "translate (%f %f) %n", + ; + else if (sscanf(s, "translate (%f %f) %n", &e, &f, &n) == 2) - ; - else if (sscanf(s, "translate (%f) %n", + ; + else if (sscanf(s, "translate (%f) %n", &e, &n) == 1) - ; - else if (sscanf(s, "scale (%f %f) %n", + ; + else if (sscanf(s, "scale (%f %f) %n", &a, &d, &n) == 2) - ; - else if (sscanf(s, "scale (%f) %n", + ; + else if (sscanf(s, "scale (%f) %n", &a, &n) == 1) - d = a; - else if (sscanf(s, "rotate (%f %f %f) %n", + d = a; + else if (sscanf(s, "rotate (%f %f %f) %n", &angle, &x, &y, &n) == 3) { - angle = angle / 180 * M_PI; - a = cos(angle); - b = sin(angle); - c = -sin(angle); - d = cos(angle); - e = -x * cos(angle) + y * sin(angle) + x; - f = -x * sin(angle) - y * cos(angle) + y; - } else if (sscanf(s, "rotate (%f) %n", + angle = angle / 180 * M_PI; + a = cos(angle); + b = sin(angle); + c = -sin(angle); + d = cos(angle); + e = -x * cos(angle) + y * sin(angle) + x; + f = -x * sin(angle) - y * cos(angle) + y; + } else if (sscanf(s, "rotate (%f) %n", &angle, &n) == 1) { - angle = angle / 180 * M_PI; - a = cos(angle); - b = sin(angle); - c = -sin(angle); - d = cos(angle); - } else if (sscanf(s, "skewX (%f) %n", + angle = angle / 180 * M_PI; + a = cos(angle); + b = sin(angle); + c = -sin(angle); + d = cos(angle); + } else if (sscanf(s, "skewX (%f) %n", &angle, &n) == 1) { - angle = angle / 180 * M_PI; - c = tan(angle); - } else if (sscanf(s, "skewY (%f) %n", + angle = angle / 180 * M_PI; + c = tan(angle); + } else if (sscanf(s, "skewY (%f) %n", &angle, &n) == 1) { - angle = angle / 180 * M_PI; - b = tan(angle); - } else - break; - ctm_a = state->ctm.a * a + state->ctm.c * b; - ctm_b = state->ctm.b * a + state->ctm.d * b; - ctm_c = state->ctm.a * c + state->ctm.c * d; - ctm_d = state->ctm.b * c + state->ctm.d * d; - ctm_e = state->ctm.a * e + state->ctm.c * f + - state->ctm.e; - ctm_f = state->ctm.b * e + state->ctm.d * f + - state->ctm.f; - state->ctm.a = ctm_a; - state->ctm.b = ctm_b; - state->ctm.c = ctm_c; - state->ctm.d = ctm_d; - state->ctm.e = ctm_e; - state->ctm.f = ctm_f; - s += n; - } - - xmlFree(transform); + angle = angle / 180 * M_PI; + b = tan(angle); + } else + break; + za = *ma * a + *mc * b; + zb = *mb * a + *md * b; + zc = *ma * c + *mc * d; + zd = *mb * c + *md * d; + ze = *ma * e + *mc * f + *me; + zf = *mb * e + *md * f + *mf; + *ma = za; + *mb = zb; + *mc = zc; + *md = zd; + *me = ze; + *mf = zf; + s += n; } } |