[thirdparty/cups.git] / pdftops / SplashT1Font.cxx

//========================================================================
//
// SplashT1Font.cc
//
//========================================================================

#include <config.h>

#if HAVE_T1LIB_H

#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif

#include <stdlib.h>
#include <t1lib.h>
#include "gmem.h"
#include "SplashMath.h"
#include "SplashGlyphBitmap.h"
#include "SplashPath.h"
#include "SplashT1FontEngine.h"
#include "SplashT1FontFile.h"
#include "SplashT1Font.h"

//------------------------------------------------------------------------

static Guchar bitReverse[256] = {
  0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
  0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
  0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
  0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
  0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
  0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
  0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
  0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
  0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
  0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
  0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
  0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
  0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
  0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
  0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
  0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
  0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
  0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
  0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
  0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
  0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
  0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
  0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
  0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
  0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
  0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
  0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
  0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
  0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
  0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
  0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
  0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
};

//------------------------------------------------------------------------
// SplashT1Font
//------------------------------------------------------------------------

SplashT1Font::SplashT1Font(SplashT1FontFile *fontFileA, SplashCoord *matA):
  SplashFont(fontFileA, matA, ((SplashT1FontFile *)fontFileA)->engine->aa)
{
  T1_TMATRIX matrix;
  BBox bbox;
  SplashCoord bbx0, bby0, bbx1, bby1;
  int x, y;

  t1libID = T1_CopyFont(fontFileA->t1libID);

  // compute font size
  size = (float)splashSqrt(mat[2]*mat[2] + mat[3]*mat[3]);

  // transform the four corners of the font bounding box -- the min
  // and max values form the bounding box of the transformed font
  bbox = T1_GetFontBBox(t1libID);
  bbx0 = 0.001 * bbox.llx;
  bby0 = 0.001 * bbox.lly;
  bbx1 = 0.001 * bbox.urx;
  bby1 = 0.001 * bbox.ury;
  // some fonts are completely broken, so we fake it (with values
  // large enough that most glyphs should fit)
  if (bbx0 == 0 && bby0 == 0 && bbx1 == 0 && bby1 == 0) {
    bbx0 = bby0 = -0.5;
    bbx1 = bby1 = 1.5;
  }
  x = (int)(mat[0] * bbx0 + mat[2] * bby0);
  xMin = xMax = x;
  y = (int)(mat[1] * bbx0 + mat[3] * bby0);
  yMin = yMax = y;
  x = (int)(mat[0] * bbx0 + mat[2] * bby1);
  if (x < xMin) {
    xMin = x;
  } else if (x > xMax) {
    xMax = x;
  }
  y = (int)(mat[1] * bbx0 + mat[3] * bby1);
  if (y < yMin) {
    yMin = y;
  } else if (y > yMax) {
    yMax = y;
  }
  x = (int)(mat[0] * bbx1 + mat[2] * bby0);
  if (x < xMin) {
    xMin = x;
  } else if (x > xMax) {
    xMax = x;
  }
  y = (int)(mat[1] * bbx1 + mat[3] * bby0);
  if (y < yMin) {
    yMin = y;
  } else if (y > yMax) {
    yMax = y;
  }
  x = (int)(mat[0] * bbx1 + mat[2] * bby1);
  if (x < xMin) {
    xMin = x;
  } else if (x > xMax) {
    xMax = x;
  }
  y = (int)(mat[1] * bbx1 + mat[3] * bby1);
  if (y < yMin) {
    yMin = y;
  } else if (y > yMax) {
    yMax = y;
  }
  // This is a kludge: some buggy PDF generators embed fonts with
  // zero bounding boxes.
  if (xMax == xMin) {
    xMin = 0;
    xMax = (int)size;
  }
  if (yMax == yMin) {
    yMin = 0;
    yMax = (int)(1.2 * size);
  }
  // Another kludge: an unusually large xMin or yMin coordinate is
  // probably wrong.
  if (xMin > 0) {
    xMin = 0;
  }
  if (yMin > 0) {
    yMin = 0;
  }
  // Another kludge: t1lib doesn't correctly handle fonts with
  // real (non-integer) bounding box coordinates.
  if (xMax - xMin > 5000) {
    xMin = 0;
    xMax = (int)size;
  }
  if (yMax - yMin > 5000) {
    yMin = 0;
    yMax = (int)(1.2 * size);
  }

  // transform the font
  matrix.cxx = (double)mat[0] / size;
  matrix.cxy = (double)mat[1] / size;
  matrix.cyx = (double)mat[2] / size;
  matrix.cyy = (double)mat[3] / size;
  T1_TransformFont(t1libID, &matrix);
}

SplashT1Font::~SplashT1Font() {
  T1_DeleteFont(t1libID);
}

GBool SplashT1Font::getGlyph(int c, int xFrac, int yFrac,
			     SplashGlyphBitmap *bitmap) {
  return SplashFont::getGlyph(c, 0, 0, bitmap);
}

GBool SplashT1Font::makeGlyph(int c, int xFrac, int yFrac,
			      SplashGlyphBitmap *bitmap) {
  GLYPH *glyph;
  int n, i;

  if (aa) {
    glyph = T1_AASetChar(t1libID, c, size, NULL);
  } else {
    glyph = T1_SetChar(t1libID, c, size, NULL);
  }
  if (!glyph) {
    return gFalse;
  }

  bitmap->x = -glyph->metrics.leftSideBearing;
  bitmap->y = glyph->metrics.ascent;
  bitmap->w = glyph->metrics.rightSideBearing - glyph->metrics.leftSideBearing;
  bitmap->h = glyph->metrics.ascent - glyph->metrics.descent;
  bitmap->aa = aa;
  if (aa) {
    bitmap->data = (Guchar *)glyph->bits;
    bitmap->freeData = gFalse;
  } else {
    n = bitmap->h * ((bitmap->w + 7) >> 3);
    bitmap->data = (Guchar *)gmalloc(n);
    for (i = 0; i < n; ++i) {
      bitmap->data[i] = bitReverse[glyph->bits[i] & 0xff];
    }
    bitmap->freeData = gTrue;
  }

  return gTrue;
}

SplashPath *SplashT1Font::getGlyphPath(int c) {
  SplashPath *path;
  T1_OUTLINE *outline;
  T1_PATHSEGMENT *seg;
  T1_BEZIERSEGMENT *bez;
  SplashCoord x, y, x1, y1;
  GBool needClose;

  path = new SplashPath();
  if (!(outline = T1_GetCharOutline(t1libID, c, size, NULL))) {
    return path;
  }
  x = 0;
  y = 0;
  needClose = gFalse;
  for (seg = outline; seg; seg = seg->link) {
    switch (seg->type) {
    case T1_PATHTYPE_MOVE:
      if (needClose) {
	path->close();
	needClose = gFalse;
      }
      x += seg->dest.x / 65536.0;
      y += seg->dest.y / 65536.0;
      path->moveTo(x, y);
      break;
    case T1_PATHTYPE_LINE:
      x += seg->dest.x / 65536.0;
      y += seg->dest.y / 65536.0;
      path->lineTo(x, y);
      needClose = gTrue;
      break;
    case T1_PATHTYPE_BEZIER:
      bez = (T1_BEZIERSEGMENT *)seg;
      x1 = x + bez->dest.x / 65536.0;
      y1 = y + bez->dest.y / 65536.0;
      path->curveTo(x + bez->B.x / 65536.0, y + bez->B.y / 65536.0,
		    x + bez->C.x / 65536.0, y + bez->C.y / 65536.0,
		    x1, y1);
      x = x1;
      y = y1;
      needClose = gTrue;
      break;
    }
  }
  if (needClose) {
    path->close();
  }
  T1_FreeOutline(outline);
  return path;
}

#endif // HAVE_T1LIB_H
Commit	Line	Data
ef416fc2	1	//========================================================================
	2	//
	3	// SplashT1Font.cc
	4	//
	5	//========================================================================
	6
	7	#include <config.h>
	8
	9	#if HAVE_T1LIB_H
	10
	11	#ifdef USE_GCC_PRAGMAS
	12	#pragma implementation
	13	#endif
	14
	15	#include <stdlib.h>
	16	#include <t1lib.h>
	17	#include "gmem.h"
	18	#include "SplashMath.h"
	19	#include "SplashGlyphBitmap.h"
	20	#include "SplashPath.h"
	21	#include "SplashT1FontEngine.h"
	22	#include "SplashT1FontFile.h"
	23	#include "SplashT1Font.h"
	24
	25	//------------------------------------------------------------------------
	26
	27	static Guchar bitReverse[256] = {
	28	0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
	29	0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
	30	0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
	31	0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
	32	0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
	33	0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
	34	0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
	35	0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
	36	0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
	37	0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
	38	0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
	39	0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
	40	0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
	41	0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
	42	0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
	43	0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
	44	0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
	45	0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
	46	0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
	47	0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
	48	0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
	49	0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
	50	0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
	51	0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
	52	0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
	53	0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
	54	0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
	55	0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
	56	0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
	57	0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
	58	0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
	59	0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
	60	};
	61
	62	//------------------------------------------------------------------------
	63	// SplashT1Font
	64	//------------------------------------------------------------------------
65
66	SplashT1Font::SplashT1Font(SplashT1FontFile fontFileA, SplashCoord matA):
67	SplashFont(fontFileA, matA, ((SplashT1FontFile *)fontFileA)->engine->aa)
68	{
69	T1_TMATRIX matrix;
70	BBox bbox;
71	SplashCoord bbx0, bby0, bbx1, bby1;
72	int x, y;
73
74	t1libID = T1_CopyFont(fontFileA->t1libID);
75
76	// compute font size
77	size = (float)splashSqrt(mat[2]mat[2] + mat[3]mat[3]);
78
79	// transform the four corners of the font bounding box -- the min
80	// and max values form the bounding box of the transformed font
81	bbox = T1_GetFontBBox(t1libID);
82	bbx0 = 0.001 * bbox.llx;
83	bby0 = 0.001 * bbox.lly;
84	bbx1 = 0.001 * bbox.urx;
85	bby1 = 0.001 * bbox.ury;
86	// some fonts are completely broken, so we fake it (with values
87	// large enough that most glyphs should fit)
88	if (bbx0 == 0 && bby0 == 0 && bbx1 == 0 && bby1 == 0) {
89	bbx0 = bby0 = -0.5;
90	bbx1 = bby1 = 1.5;
91	}
92	x = (int)(mat[0] * bbx0 + mat[2] * bby0);
93	xMin = xMax = x;
94	y = (int)(mat[1] * bbx0 + mat[3] * bby0);
95	yMin = yMax = y;
96	x = (int)(mat[0] * bbx0 + mat[2] * bby1);
97	if (x < xMin) {
98	xMin = x;
99	} else if (x > xMax) {
100	xMax = x;
101	}
102	y = (int)(mat[1] * bbx0 + mat[3] * bby1);
103	if (y < yMin) {
104	yMin = y;
105	} else if (y > yMax) {
106	yMax = y;
107	}
108	x = (int)(mat[0] * bbx1 + mat[2] * bby0);
109	if (x < xMin) {
110	xMin = x;
111	} else if (x > xMax) {
112	xMax = x;
113	}
114	y = (int)(mat[1] * bbx1 + mat[3] * bby0);
115	if (y < yMin) {
116	yMin = y;
117	} else if (y > yMax) {
118	yMax = y;
119	}
120	x = (int)(mat[0] * bbx1 + mat[2] * bby1);
121	if (x < xMin) {
122	xMin = x;
123	} else if (x > xMax) {
124	xMax = x;
125	}
126	y = (int)(mat[1] * bbx1 + mat[3] * bby1);
127	if (y < yMin) {
128	yMin = y;
129	} else if (y > yMax) {
130	yMax = y;
131	}
132	// This is a kludge: some buggy PDF generators embed fonts with
133	// zero bounding boxes.
134	if (xMax == xMin) {
135	xMin = 0;
136	xMax = (int)size;
137	}
138	if (yMax == yMin) {
139	yMin = 0;
140	yMax = (int)(1.2 * size);
141	}
142	// Another kludge: an unusually large xMin or yMin coordinate is
143	// probably wrong.
144	if (xMin > 0) {
145	xMin = 0;
146	}
147	if (yMin > 0) {
148	yMin = 0;
149	}
150	// Another kludge: t1lib doesn't correctly handle fonts with
151	// real (non-integer) bounding box coordinates.
152	if (xMax - xMin > 5000) {
153	xMin = 0;
154	xMax = (int)size;
155	}
156	if (yMax - yMin > 5000) {
157	yMin = 0;
158	yMax = (int)(1.2 * size);
159	}
160
161	// transform the font
162	matrix.cxx = (double)mat[0] / size;
163	matrix.cxy = (double)mat[1] / size;
164	matrix.cyx = (double)mat[2] / size;
165	matrix.cyy = (double)mat[3] / size;
166	T1_TransformFont(t1libID, &matrix);
167	}
168
169	SplashT1Font::~SplashT1Font() {
170	T1_DeleteFont(t1libID);
171	}
172
173	GBool SplashT1Font::getGlyph(int c, int xFrac, int yFrac,
174	SplashGlyphBitmap *bitmap) {
175	return SplashFont::getGlyph(c, 0, 0, bitmap);
176	}
177
178	GBool SplashT1Font::makeGlyph(int c, int xFrac, int yFrac,
179	SplashGlyphBitmap *bitmap) {
180	GLYPH *glyph;
181	int n, i;
182
183	if (aa) {
184	glyph = T1_AASetChar(t1libID, c, size, NULL);
185	} else {
186	glyph = T1_SetChar(t1libID, c, size, NULL);
187	}
188	if (!glyph) {
189	return gFalse;
190	}
191
192	bitmap->x = -glyph->metrics.leftSideBearing;
193	bitmap->y = glyph->metrics.ascent;
194	bitmap->w = glyph->metrics.rightSideBearing - glyph->metrics.leftSideBearing;
195	bitmap->h = glyph->metrics.ascent - glyph->metrics.descent;
196	bitmap->aa = aa;
197	if (aa) {
198	bitmap->data = (Guchar *)glyph->bits;
199	bitmap->freeData = gFalse;
200	} else {
201	n = bitmap->h * ((bitmap->w + 7) >> 3);
202	bitmap->data = (Guchar *)gmalloc(n);
203	for (i = 0; i < n; ++i) {
204	bitmap->data[i] = bitReverse[glyph->bits[i] & 0xff];
205	}
206	bitmap->freeData = gTrue;
207	}
208
209	return gTrue;
210	}
211
212	SplashPath *SplashT1Font::getGlyphPath(int c) {
213	SplashPath *path;
214	T1_OUTLINE *outline;
215	T1_PATHSEGMENT *seg;
216	T1_BEZIERSEGMENT *bez;
217	SplashCoord x, y, x1, y1;
218	GBool needClose;
219
220	path = new SplashPath();
221	if (!(outline = T1_GetCharOutline(t1libID, c, size, NULL))) {
222	return path;
223	}
224	x = 0;
225	y = 0;
226	needClose = gFalse;
227	for (seg = outline; seg; seg = seg->link) {
228	switch (seg->type) {
229	case T1_PATHTYPE_MOVE:
230	if (needClose) {
231	path->close();
232	needClose = gFalse;
233	}
234	x += seg->dest.x / 65536.0;
235	y += seg->dest.y / 65536.0;
236	path->moveTo(x, y);
237	break;
238	case T1_PATHTYPE_LINE:
239	x += seg->dest.x / 65536.0;
240	y += seg->dest.y / 65536.0;
241	path->lineTo(x, y);
242	needClose = gTrue;
243	break;
244	case T1_PATHTYPE_BEZIER:
245	bez = (T1_BEZIERSEGMENT *)seg;
246	x1 = x + bez->dest.x / 65536.0;
247	y1 = y + bez->dest.y / 65536.0;
248	path->curveTo(x + bez->B.x / 65536.0, y + bez->B.y / 65536.0,
249	x + bez->C.x / 65536.0, y + bez->C.y / 65536.0,
250	x1, y1);
251	x = x1;
252	y = y1;
253	needClose = gTrue;
254	break;
255	}
256	}
257	if (needClose) {
258	path->close();
259	}
260	T1_FreeOutline(outline);
261	return path;
262	}
263
264	#endif // HAVE_T1LIB_H