1 /* remove_font_transform.c
3 Part of the swftools package.
5 Copyright (c) 2010 Matthias Kramm <kramm@quiss.org>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
24 #include "../gfxfilter.h"
25 #include "../gfxtools.h"
26 #include "../gfxfont.h"
31 typedef struct _mymatrix {
32 float m00,m01,m10,m11;
36 static void* mymatrix_clone(const void*_m) {
39 const mymatrix_t*m1=_m;
40 mymatrix_t*m2 = malloc(sizeof(mymatrix_t));
42 m2->id = strdup(m1->id);
45 static unsigned int mymatrix_hash(const void*_m) {
48 const mymatrix_t*m = (mymatrix_t*)_m;
50 h = crc32_add_bytes(h, (char*)&m->m00, sizeof(m->m00));
51 h = crc32_add_bytes(h, (char*)&m->m01, sizeof(m->m01));
52 h = crc32_add_bytes(h, (char*)&m->m10, sizeof(m->m10));
53 h = crc32_add_bytes(h, (char*)&m->m11, sizeof(m->m11));
54 h = crc32_add_string(h, m->id);
57 static void mymatrix_destroy(void*_m) {
58 mymatrix_t*m = (mymatrix_t*)_m;
62 static char mymatrix_equals(const void*_m1, const void*_m2) {
63 const mymatrix_t*m1=_m1;
64 const mymatrix_t*m2=_m2;
68 /* we do a binary comparison of the float32
69 bits here instead of a numerical comparison
70 to prevent the compiler from e.g. removing the
71 (float) cast during optimization, which would break
72 the equivalence between equals() and hash() (as
73 the hash is derived from the float32 values) */
74 return *(U32*)&m1->m00 == *(U32*)&m2->m00 &&
75 *(U32*)&m1->m01 == *(U32*)&m2->m01 &&
76 *(U32*)&m1->m10 == *(U32*)&m2->m10 &&
77 *(U32*)&m1->m11 == *(U32*)&m2->m11 &&
78 !strcmp(m1->id, m2->id);
80 type_t mymatrix_type = {
83 free: mymatrix_destroy,
84 equals: mymatrix_equals
87 typedef struct _internal {
94 void __attribute__((noinline))
95 matrix_convert(gfxmatrix_t*in, const char*id, mymatrix_t*out, gfxmatrix_t*scalematrix)
97 void matrix_convert(gfxmatrix_t*in, const char*id, mymatrix_t*out, gfxmatrix_t*scalematrix)
100 double l1 = sqrt(in->m00 * in->m00 + in->m01 * in->m01);
101 double l2 = sqrt(in->m10 * in->m10 + in->m11 * in->m11);
104 memset(out, 0, sizeof(*out));
107 out->m00 = in->m00 / l;
108 out->m01 = in->m01 / l;
109 out->m10 = in->m10 / l;
110 out->m11 = in->m11 / l;
114 scalematrix->m00 = l;
115 scalematrix->m01 = 0;
116 scalematrix->m10 = 0;
117 scalematrix->m11 = l;
118 scalematrix->tx = in->tx;
119 scalematrix->ty = in->ty;
123 typedef struct _matrixdata {
127 typedef struct _transformedfont {
134 static transformedfont_t* transformedfont_new(gfxfont_t*orig, mymatrix_t*m)
136 transformedfont_t*f = rfx_calloc(sizeof(transformedfont_t));
139 f->used = malloc(sizeof(f->used[0])*orig->num_glyphs);
143 static void pass1_drawchar(gfxfilter_t*f, gfxfont_t*font, int glyphnr, gfxcolor_t*color, gfxmatrix_t*matrix, gfxdevice_t*out)
145 internal_t*i = (internal_t*)f->internal;
147 matrix_convert(matrix, font->id, &m, 0);
148 transformedfont_t*fd = dict_lookup(i->matrices, &m);
150 fd = transformedfont_new(font, &m);
151 dict_put(i->matrices, &m, fd);
154 out->drawchar(out, font, glyphnr, color, matrix);
157 static void glyph_transform(gfxglyph_t*g, mymatrix_t*mm)
166 gfxline_transform(g->line, &m);
172 static gfxresult_t* pass1_finish(gfxfilter_t*f, gfxdevice_t*out)
174 internal_t*i = (internal_t*)f->internal;
175 DICT_ITERATE_DATA(i->matrices, transformedfont_t*, fd) {
176 gfxfont_t*font = fd->font = rfx_calloc(sizeof(gfxfont_t));
178 static int fontcount=0;
179 sprintf(id, "font%d", fontcount++);
180 font->id = strdup(id);
183 for(t=0;t<fd->orig->num_glyphs;t++) {
187 font->num_glyphs = count;
188 font->glyphs = rfx_calloc(sizeof(gfxglyph_t)*font->num_glyphs);
190 for(t=0;t<fd->orig->num_glyphs;t++) {
192 font->glyphs[count] = fd->orig->glyphs[t];
193 glyph_transform(&font->glyphs[count], &fd->matrix);
198 gfxfont_fix_unicode(font);
200 return out->finish(out);
203 static void pass2_drawchar(gfxfilter_t*f, gfxfont_t*font, int glyphnr, gfxcolor_t*color, gfxmatrix_t*matrix, gfxdevice_t*out)
205 internal_t*i = (internal_t*)f->internal;
209 DICT_ITERATE_DATA(i->matrices, transformedfont_t*, fd) {
210 out->addfont(out, fd->font);
215 gfxmatrix_t scalematrix;
216 matrix_convert(matrix, font->id, &m, &scalematrix);
217 transformedfont_t*d = dict_lookup(i->matrices, &m);
218 out->drawchar(out, d->font, d->used[glyphnr], color, &scalematrix);
221 void gfxtwopassfilter_remove_font_transforms_init(gfxtwopassfilter_t*f)
223 internal_t*i = (internal_t*)rfx_calloc(sizeof(internal_t));
225 memset(f, 0, sizeof(gfxtwopassfilter_t));
226 f->type = gfxfilter_twopass;
228 f->pass1.name = "remove font transforms pass 1";
229 f->pass1.drawchar = pass1_drawchar;
230 f->pass1.finish = pass1_finish;
231 f->pass1.internal = i;
233 f->pass2.name = "remove font transforms pass 2";
234 f->pass2.drawchar = pass2_drawchar;
235 f->pass2.internal = i;
237 i->matrices = dict_new2(&mymatrix_type);