134 lines
2.8 KiB
C
134 lines
2.8 KiB
C
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#include "fitz.h"
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fz_text *
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fz_new_text(fz_font *font, fz_matrix trm, int wmode)
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{
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fz_text *text;
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text = fz_malloc(sizeof(fz_text));
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text->font = fz_keep_font(font);
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text->trm = trm;
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text->wmode = wmode;
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text->len = 0;
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text->cap = 0;
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text->items = NULL;
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return text;
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}
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void
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fz_free_text(fz_text *text)
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{
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fz_drop_font(text->font);
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fz_free(text->items);
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fz_free(text);
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}
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fz_text *
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fz_clone_text(fz_text *old)
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{
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fz_text *text;
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text = fz_malloc(sizeof(fz_text));
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text->font = fz_keep_font(old->font);
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text->trm = old->trm;
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text->wmode = old->wmode;
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text->len = old->len;
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text->cap = text->len;
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text->items = fz_calloc(text->len, sizeof(fz_text_item));
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memcpy(text->items, old->items, text->len * sizeof(fz_text_item));
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return text;
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}
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fz_rect
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fz_bound_text(fz_text *text, fz_matrix ctm)
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{
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fz_matrix trm;
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fz_rect bbox;
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fz_rect fbox;
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int i;
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if (text->len == 0)
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return fz_empty_rect;
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/* find bbox of glyph origins in ctm space */
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bbox.x0 = bbox.x1 = text->items[0].x;
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bbox.y0 = bbox.y1 = text->items[0].y;
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for (i = 1; i < text->len; i++)
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{
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bbox.x0 = MIN(bbox.x0, text->items[i].x);
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bbox.y0 = MIN(bbox.y0, text->items[i].y);
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bbox.x1 = MAX(bbox.x1, text->items[i].x);
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bbox.y1 = MAX(bbox.y1, text->items[i].y);
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}
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bbox = fz_transform_rect(ctm, bbox);
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/* find bbox of font in trm * ctm space */
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trm = fz_concat(text->trm, ctm);
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trm.e = 0;
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trm.f = 0;
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fbox.x0 = text->font->bbox.x0 * 0.001f;
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fbox.y0 = text->font->bbox.y0 * 0.001f;
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fbox.x1 = text->font->bbox.x1 * 0.001f;
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fbox.y1 = text->font->bbox.y1 * 0.001f;
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fbox = fz_transform_rect(trm, fbox);
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/* expand glyph origin bbox by font bbox */
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bbox.x0 += fbox.x0;
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bbox.y0 += fbox.y0;
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bbox.x1 += fbox.x1;
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bbox.y1 += fbox.y1;
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return bbox;
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}
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static void
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fz_grow_text(fz_text *text, int n)
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{
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if (text->len + n < text->cap)
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return;
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while (text->len + n > text->cap)
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text->cap = text->cap + 36;
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text->items = fz_realloc(text->items, text->cap, sizeof(fz_text_item));
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}
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void
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fz_add_text(fz_text *text, int gid, int ucs, float x, float y)
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{
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fz_grow_text(text, 1);
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text->items[text->len].ucs = ucs;
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text->items[text->len].gid = gid;
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text->items[text->len].x = x;
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text->items[text->len].y = y;
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text->len++;
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}
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static int isxmlmeta(int c)
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{
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return c < 32 || c >= 128 || c == '&' || c == '<' || c == '>' || c == '\'' || c == '"';
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}
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void fz_debug_text(fz_text *text, int indent)
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{
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int i, n;
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for (i = 0; i < text->len; i++)
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{
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for (n = 0; n < indent; n++)
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putchar(' ');
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if (!isxmlmeta(text->items[i].ucs))
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printf("<g ucs=\"%c\" gid=\"%d\" x=\"%g\" y=\"%g\" />\n",
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text->items[i].ucs, text->items[i].gid, text->items[i].x, text->items[i].y);
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else
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printf("<g ucs=\"U+%04X\" gid=\"%d\" x=\"%g\" y=\"%g\" />\n",
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text->items[i].ucs, text->items[i].gid, text->items[i].x, text->items[i].y);
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}
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}
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