--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src_classic/helper-defines.i	Mon Sep 15 11:37:51 2025 +0200
@@ -0,0 +1,817 @@
+%inline %{
+/*
+# ------------------------------------------------------------------------
+# Copyright 2020-2022, Harald Lieder, mailto:harald.lieder@outlook.com
+# License: GNU AFFERO GPL 3.0, https://www.gnu.org/licenses/agpl-3.0.html
+#
+# Part of "PyMuPDF", a Python binding for "MuPDF" (http://mupdf.com), a
+# lightweight PDF, XPS, and E-book viewer, renderer and toolkit which is
+# maintained and developed by Artifex Software, Inc. https://artifex.com.
+# ------------------------------------------------------------------------
+*/
+//----------------------------------------------------------------------------
+// general
+//----------------------------------------------------------------------------
+#define EPSILON 1e-5
+
+//----------------------------------------------------------------------------
+// annotation types
+//----------------------------------------------------------------------------
+#define PDF_ANNOT_TEXT 0
+#define PDF_ANNOT_LINK 1
+#define PDF_ANNOT_FREE_TEXT 2
+#define PDF_ANNOT_LINE 3
+#define PDF_ANNOT_SQUARE 4
+#define PDF_ANNOT_CIRCLE 5
+#define PDF_ANNOT_POLYGON 6
+#define PDF_ANNOT_POLY_LINE 7
+#define PDF_ANNOT_HIGHLIGHT 8
+#define PDF_ANNOT_UNDERLINE 9
+#define PDF_ANNOT_SQUIGGLY 10
+#define PDF_ANNOT_STRIKE_OUT 11
+#define PDF_ANNOT_REDACT 12
+#define PDF_ANNOT_STAMP 13
+#define PDF_ANNOT_CARET 14
+#define PDF_ANNOT_INK 15
+#define PDF_ANNOT_POPUP 16
+#define PDF_ANNOT_FILE_ATTACHMENT 17
+#define PDF_ANNOT_SOUND 18
+#define PDF_ANNOT_MOVIE 19
+#define PDF_ANNOT_RICH_MEDIA 20
+#define PDF_ANNOT_WIDGET 21
+#define PDF_ANNOT_SCREEN 22
+#define PDF_ANNOT_PRINTER_MARK 23
+#define PDF_ANNOT_TRAP_NET 24
+#define PDF_ANNOT_WATERMARK 25
+#define PDF_ANNOT_3D 26
+#define PDF_ANNOT_PROJECTION 27
+#define PDF_ANNOT_UNKNOWN -1
+
+//------------------------
+// redaction annot options
+//------------------------
+#define PDF_REDACT_IMAGE_NONE 0
+#define PDF_REDACT_IMAGE_REMOVE 1
+#define PDF_REDACT_IMAGE_PIXELS 2
+
+//----------------------------------------------------------------------------
+// annotation flag bits
+//----------------------------------------------------------------------------
+#define PDF_ANNOT_IS_INVISIBLE 1 << (1-1)
+#define PDF_ANNOT_IS_HIDDEN 1 << (2-1)
+#define PDF_ANNOT_IS_PRINT 1 << (3-1)
+#define PDF_ANNOT_IS_NO_ZOOM 1 << (4-1)
+#define PDF_ANNOT_IS_NO_ROTATE 1 << (5-1)
+#define PDF_ANNOT_IS_NO_VIEW 1 << (6-1)
+#define PDF_ANNOT_IS_READ_ONLY 1 << (7-1)
+#define PDF_ANNOT_IS_LOCKED 1 << (8-1)
+#define PDF_ANNOT_IS_TOGGLE_NO_VIEW 1 << (9-1)
+#define PDF_ANNOT_IS_LOCKED_CONTENTS 1 << (10-1)
+
+
+//----------------------------------------------------------------------------
+// annotation line ending styles
+//----------------------------------------------------------------------------
+#define PDF_ANNOT_LE_NONE 0
+#define PDF_ANNOT_LE_SQUARE 1
+#define PDF_ANNOT_LE_CIRCLE 2
+#define PDF_ANNOT_LE_DIAMOND 3
+#define PDF_ANNOT_LE_OPEN_ARROW 4
+#define PDF_ANNOT_LE_CLOSED_ARROW 5
+#define PDF_ANNOT_LE_BUTT 6
+#define PDF_ANNOT_LE_R_OPEN_ARROW 7
+#define PDF_ANNOT_LE_R_CLOSED_ARROW 8
+#define PDF_ANNOT_LE_SLASH 9
+
+
+//----------------------------------------------------------------------------
+// annotation field (widget) types
+//----------------------------------------------------------------------------
+#define PDF_WIDGET_TYPE_UNKNOWN 0
+#define PDF_WIDGET_TYPE_BUTTON 1
+#define PDF_WIDGET_TYPE_CHECKBOX 2
+#define PDF_WIDGET_TYPE_COMBOBOX 3
+#define PDF_WIDGET_TYPE_LISTBOX 4
+#define PDF_WIDGET_TYPE_RADIOBUTTON 5
+#define PDF_WIDGET_TYPE_SIGNATURE 6
+#define PDF_WIDGET_TYPE_TEXT 7
+
+
+//----------------------------------------------------------------------------
+// annotation text widget subtypes
+//----------------------------------------------------------------------------
+#define PDF_WIDGET_TX_FORMAT_NONE 0
+#define PDF_WIDGET_TX_FORMAT_NUMBER 1
+#define PDF_WIDGET_TX_FORMAT_SPECIAL 2
+#define PDF_WIDGET_TX_FORMAT_DATE 3
+#define PDF_WIDGET_TX_FORMAT_TIME 4
+
+
+//----------------------------------------------------------------------------
+// annotation widget flags
+//----------------------------------------------------------------------------
+// Common to all field types
+#define PDF_FIELD_IS_READ_ONLY 1
+#define PDF_FIELD_IS_REQUIRED 1 << 1
+#define PDF_FIELD_IS_NO_EXPORT 1 << 2
+
+
+// Text fields
+#define PDF_TX_FIELD_IS_MULTILINE  1 << 12
+#define PDF_TX_FIELD_IS_PASSWORD  1 << 13
+#define PDF_TX_FIELD_IS_FILE_SELECT  1 << 20
+#define PDF_TX_FIELD_IS_DO_NOT_SPELL_CHECK  1 << 22
+#define PDF_TX_FIELD_IS_DO_NOT_SCROLL  1 << 23
+#define PDF_TX_FIELD_IS_COMB  1 << 24
+#define PDF_TX_FIELD_IS_RICH_TEXT  1 << 25
+
+
+// Button fields
+#define PDF_BTN_FIELD_IS_NO_TOGGLE_TO_OFF  1 << 14
+#define PDF_BTN_FIELD_IS_RADIO  1 << 15
+#define PDF_BTN_FIELD_IS_PUSHBUTTON  1 << 16
+#define PDF_BTN_FIELD_IS_RADIOS_IN_UNISON  1 << 25
+
+
+// Choice fields
+#define PDF_CH_FIELD_IS_COMBO  1 << 17
+#define PDF_CH_FIELD_IS_EDIT  1 << 18
+#define PDF_CH_FIELD_IS_SORT  1 << 19
+#define PDF_CH_FIELD_IS_MULTI_SELECT  1 << 21
+#define PDF_CH_FIELD_IS_DO_NOT_SPELL_CHECK  1 << 22
+#define PDF_CH_FIELD_IS_COMMIT_ON_SEL_CHANGE  1 << 25
+
+
+// Signature fields errors
+#define PDF_SIGNATURE_ERROR_OKAY 0
+#define PDF_SIGNATURE_ERROR_NO_SIGNATURES 1
+#define PDF_SIGNATURE_ERROR_NO_CERTIFICATE 2
+#define PDF_SIGNATURE_ERROR_DIGEST_FAILURE 3
+#define PDF_SIGNATURE_ERROR_SELF_SIGNED 4
+#define PDF_SIGNATURE_ERROR_SELF_SIGNED_IN_CHAIN 5
+#define PDF_SIGNATURE_ERROR_NOT_TRUSTED 6
+#define PDF_SIGNATURE_ERROR_UNKNOWN 7
+
+// Signature appearances
+
+#define PDF_SIGNATURE_SHOW_LABELS 1
+#define PDF_SIGNATURE_SHOW_DN 2
+#define PDF_SIGNATURE_SHOW_DATE 4
+#define PDF_SIGNATURE_SHOW_TEXT_NAME 8
+#define PDF_SIGNATURE_SHOW_GRAPHIC_NAME 16
+#define PDF_SIGNATURE_SHOW_LOGO 32
+#define PDF_SIGNATURE_DEFAULT_APPEARANCE ( \
+	PDF_SIGNATURE_SHOW_LABELS | \
+	PDF_SIGNATURE_SHOW_DN | \
+	PDF_SIGNATURE_SHOW_DATE | \
+	PDF_SIGNATURE_SHOW_TEXT_NAME | \
+	PDF_SIGNATURE_SHOW_GRAPHIC_NAME | \
+	PDF_SIGNATURE_SHOW_LOGO )
+
+//----------------------------------------------------------------------------
+// colorspace identifiers
+//----------------------------------------------------------------------------
+#define CS_RGB  1
+#define CS_GRAY 2
+#define CS_CMYK 3
+
+//----------------------------------------------------------------------------
+// PDF encryption algorithms
+//----------------------------------------------------------------------------
+#define PDF_ENCRYPT_KEEP 0
+#define PDF_ENCRYPT_NONE 1
+#define PDF_ENCRYPT_RC4_40 2
+#define PDF_ENCRYPT_RC4_128 3
+#define PDF_ENCRYPT_AES_128 4
+#define PDF_ENCRYPT_AES_256 5
+#define PDF_ENCRYPT_UNKNOWN 6
+
+//----------------------------------------------------------------------------
+// PDF permission codes
+//----------------------------------------------------------------------------
+#define PDF_PERM_PRINT 1 << 2
+#define PDF_PERM_MODIFY 1 << 3
+#define PDF_PERM_COPY 1 << 4
+#define PDF_PERM_ANNOTATE 1 << 5
+#define PDF_PERM_FORM 1 << 8
+#define PDF_PERM_ACCESSIBILITY 1 << 9
+#define PDF_PERM_ASSEMBLE 1 << 10
+#define PDF_PERM_PRINT_HQ 1 << 11
+
+//----------------------------------------------------------------------------
+// PDF Blend Modes
+//----------------------------------------------------------------------------
+#define PDF_BM_Color "Color"
+#define PDF_BM_ColorBurn "ColorBurn"
+#define PDF_BM_ColorDodge "ColorDodge"
+#define PDF_BM_Darken "Darken"
+#define PDF_BM_Difference "Difference"
+#define PDF_BM_Exclusion "Exclusion"
+#define PDF_BM_HardLight "HardLight"
+#define PDF_BM_Hue "Hue"
+#define PDF_BM_Lighten "Lighten"
+#define PDF_BM_Luminosity "Luminosity"
+#define PDF_BM_Multiply "Multiply"
+#define PDF_BM_Normal "Normal"
+#define PDF_BM_Overlay "Overlay"
+#define PDF_BM_Saturation "Saturation"
+#define PDF_BM_Screen "Screen"
+#define PDF_BM_SoftLight "Softlight"
+
+
+// General text flags
+#define TEXT_FONT_SUPERSCRIPT 1
+#define TEXT_FONT_ITALIC 2
+#define TEXT_FONT_SERIFED 4
+#define TEXT_FONT_MONOSPACED 8
+#define TEXT_FONT_BOLD 16
+
+// UCDN Script codes
+#define UCDN_SCRIPT_COMMON 0
+#define UCDN_SCRIPT_LATIN 1
+#define UCDN_SCRIPT_GREEK 2
+#define UCDN_SCRIPT_CYRILLIC 3
+#define UCDN_SCRIPT_ARMENIAN 4
+#define UCDN_SCRIPT_HEBREW 5
+#define UCDN_SCRIPT_ARABIC 6
+#define UCDN_SCRIPT_SYRIAC 7
+#define UCDN_SCRIPT_THAANA 8
+#define UCDN_SCRIPT_DEVANAGARI 9
+#define UCDN_SCRIPT_BENGALI 10
+#define UCDN_SCRIPT_GURMUKHI 11
+#define UCDN_SCRIPT_GUJARATI 12
+#define UCDN_SCRIPT_ORIYA 13
+#define UCDN_SCRIPT_TAMIL 14
+#define UCDN_SCRIPT_TELUGU 15
+#define UCDN_SCRIPT_KANNADA 16
+#define UCDN_SCRIPT_MALAYALAM 17
+#define UCDN_SCRIPT_SINHALA 18
+#define UCDN_SCRIPT_THAI 19
+#define UCDN_SCRIPT_LAO 20
+#define UCDN_SCRIPT_TIBETAN 21
+#define UCDN_SCRIPT_MYANMAR 22
+#define UCDN_SCRIPT_GEORGIAN 23
+#define UCDN_SCRIPT_HANGUL 24
+#define UCDN_SCRIPT_ETHIOPIC 25
+#define UCDN_SCRIPT_CHEROKEE 26
+#define UCDN_SCRIPT_CANADIAN_ABORIGINAL 27
+#define UCDN_SCRIPT_OGHAM 28
+#define UCDN_SCRIPT_RUNIC 29
+#define UCDN_SCRIPT_KHMER 30
+#define UCDN_SCRIPT_MONGOLIAN 31
+#define UCDN_SCRIPT_HIRAGANA 32
+#define UCDN_SCRIPT_KATAKANA 33
+#define UCDN_SCRIPT_BOPOMOFO 34
+#define UCDN_SCRIPT_HAN 35
+#define UCDN_SCRIPT_YI 36
+#define UCDN_SCRIPT_OLD_ITALIC 37
+#define UCDN_SCRIPT_GOTHIC 38
+#define UCDN_SCRIPT_DESERET 39
+#define UCDN_SCRIPT_INHERITED 40
+#define UCDN_SCRIPT_TAGALOG 41
+#define UCDN_SCRIPT_HANUNOO 42
+#define UCDN_SCRIPT_BUHID 43
+#define UCDN_SCRIPT_TAGBANWA 44
+#define UCDN_SCRIPT_LIMBU 45
+#define UCDN_SCRIPT_TAI_LE 46
+#define UCDN_SCRIPT_LINEAR_B 47
+#define UCDN_SCRIPT_UGARITIC 48
+#define UCDN_SCRIPT_SHAVIAN 49
+#define UCDN_SCRIPT_OSMANYA 50
+#define UCDN_SCRIPT_CYPRIOT 51
+#define UCDN_SCRIPT_BRAILLE 52
+#define UCDN_SCRIPT_BUGINESE 53
+#define UCDN_SCRIPT_COPTIC 54
+#define UCDN_SCRIPT_NEW_TAI_LUE 55
+#define UCDN_SCRIPT_GLAGOLITIC 56
+#define UCDN_SCRIPT_TIFINAGH 57
+#define UCDN_SCRIPT_SYLOTI_NAGRI 58
+#define UCDN_SCRIPT_OLD_PERSIAN 59
+#define UCDN_SCRIPT_KHAROSHTHI 60
+#define UCDN_SCRIPT_BALINESE 61
+#define UCDN_SCRIPT_CUNEIFORM 62
+#define UCDN_SCRIPT_PHOENICIAN 63
+#define UCDN_SCRIPT_PHAGS_PA 64
+#define UCDN_SCRIPT_NKO 65
+#define UCDN_SCRIPT_SUNDANESE 66
+#define UCDN_SCRIPT_LEPCHA 67
+#define UCDN_SCRIPT_OL_CHIKI 68
+#define UCDN_SCRIPT_VAI 69
+#define UCDN_SCRIPT_SAURASHTRA 70
+#define UCDN_SCRIPT_KAYAH_LI 71
+#define UCDN_SCRIPT_REJANG 72
+#define UCDN_SCRIPT_LYCIAN 73
+#define UCDN_SCRIPT_CARIAN 74
+#define UCDN_SCRIPT_LYDIAN 75
+#define UCDN_SCRIPT_CHAM 76
+#define UCDN_SCRIPT_TAI_THAM 77
+#define UCDN_SCRIPT_TAI_VIET 78
+#define UCDN_SCRIPT_AVESTAN 79
+#define UCDN_SCRIPT_EGYPTIAN_HIEROGLYPHS 80
+#define UCDN_SCRIPT_SAMARITAN 81
+#define UCDN_SCRIPT_LISU 82
+#define UCDN_SCRIPT_BAMUM 83
+#define UCDN_SCRIPT_JAVANESE 84
+#define UCDN_SCRIPT_MEETEI_MAYEK 85
+#define UCDN_SCRIPT_IMPERIAL_ARAMAIC 86
+#define UCDN_SCRIPT_OLD_SOUTH_ARABIAN 87
+#define UCDN_SCRIPT_INSCRIPTIONAL_PARTHIAN 88
+#define UCDN_SCRIPT_INSCRIPTIONAL_PAHLAVI 89
+#define UCDN_SCRIPT_OLD_TURKIC 90
+#define UCDN_SCRIPT_KAITHI 91
+#define UCDN_SCRIPT_BATAK 92
+#define UCDN_SCRIPT_BRAHMI 93
+#define UCDN_SCRIPT_MANDAIC 94
+#define UCDN_SCRIPT_CHAKMA 95
+#define UCDN_SCRIPT_MEROITIC_CURSIVE 96
+#define UCDN_SCRIPT_MEROITIC_HIEROGLYPHS 97
+#define UCDN_SCRIPT_MIAO 98
+#define UCDN_SCRIPT_SHARADA 99
+#define UCDN_SCRIPT_SORA_SOMPENG 100
+#define UCDN_SCRIPT_TAKRI 101
+#define UCDN_SCRIPT_UNKNOWN 102
+#define UCDN_SCRIPT_BASSA_VAH 103
+#define UCDN_SCRIPT_CAUCASIAN_ALBANIAN 104
+#define UCDN_SCRIPT_DUPLOYAN 105
+#define UCDN_SCRIPT_ELBASAN 106
+#define UCDN_SCRIPT_GRANTHA 107
+#define UCDN_SCRIPT_KHOJKI 108
+#define UCDN_SCRIPT_KHUDAWADI 109
+#define UCDN_SCRIPT_LINEAR_A 110
+#define UCDN_SCRIPT_MAHAJANI 111
+#define UCDN_SCRIPT_MANICHAEAN 112
+#define UCDN_SCRIPT_MENDE_KIKAKUI 113
+#define UCDN_SCRIPT_MODI 114
+#define UCDN_SCRIPT_MRO 115
+#define UCDN_SCRIPT_NABATAEAN 116
+#define UCDN_SCRIPT_OLD_NORTH_ARABIAN 117
+#define UCDN_SCRIPT_OLD_PERMIC 118
+#define UCDN_SCRIPT_PAHAWH_HMONG 119
+#define UCDN_SCRIPT_PALMYRENE 120
+#define UCDN_SCRIPT_PAU_CIN_HAU 121
+#define UCDN_SCRIPT_PSALTER_PAHLAVI 122
+#define UCDN_SCRIPT_SIDDHAM 123
+#define UCDN_SCRIPT_TIRHUTA 124
+#define UCDN_SCRIPT_WARANG_CITI 125
+#define UCDN_SCRIPT_AHOM 126
+#define UCDN_SCRIPT_ANATOLIAN_HIEROGLYPHS 127
+#define UCDN_SCRIPT_HATRAN 128
+#define UCDN_SCRIPT_MULTANI 129
+#define UCDN_SCRIPT_OLD_HUNGARIAN 130
+#define UCDN_SCRIPT_SIGNWRITING 131
+#define UCDN_SCRIPT_ADLAM 132
+#define UCDN_SCRIPT_BHAIKSUKI 133
+#define UCDN_SCRIPT_MARCHEN 134
+#define UCDN_SCRIPT_NEWA 135
+#define UCDN_SCRIPT_OSAGE 136
+#define UCDN_SCRIPT_TANGUT 137
+#define UCDN_SCRIPT_MASARAM_GONDI 138
+#define UCDN_SCRIPT_NUSHU 139
+#define UCDN_SCRIPT_SOYOMBO 140
+#define UCDN_SCRIPT_ZANABAZAR_SQUARE 141
+#define UCDN_SCRIPT_DOGRA 142
+#define UCDN_SCRIPT_GUNJALA_GONDI 143
+#define UCDN_SCRIPT_HANIFI_ROHINGYA 144
+#define UCDN_SCRIPT_MAKASAR 145
+#define UCDN_SCRIPT_MEDEFAIDRIN 146
+#define UCDN_SCRIPT_OLD_SOGDIAN 147
+#define UCDN_SCRIPT_SOGDIAN 148
+#define UCDN_SCRIPT_ELYMAIC 149
+#define UCDN_SCRIPT_NANDINAGARI 150
+#define UCDN_SCRIPT_NYIAKENG_PUACHUE_HMONG 151
+#define UCDN_SCRIPT_WANCHO 152
+
+
+// exceptions
+PyObject *_set_FileDataError(PyObject *value)
+{
+	if (!value) {
+		Py_RETURN_FALSE;
+	}
+	JM_Exc_FileDataError = value;
+	Py_RETURN_TRUE;
+}
+
+//-------------------------------------------------------------------
+// minor tools
+//-------------------------------------------------------------------
+PyObject *util_sine_between(PyObject *C, PyObject *P, PyObject *Q)
+{
+	// for points C, P, Q compute the sine between lines CP and QP
+	fz_point c = JM_point_from_py(C);
+	fz_point p = JM_point_from_py(P);
+	fz_point q = JM_point_from_py(Q);
+	fz_point s = JM_normalize_vector(q.x - p.x, q.y - p.y);
+	fz_matrix m1 = fz_make_matrix(1, 0, 0, 1, -p.x, -p.y);
+	fz_matrix m2 = fz_make_matrix(s.x, -s.y, s.y, s.x, 0, 0);
+	m1 = fz_concat(m1, m2);
+	c = fz_transform_point(c, m1);
+	c = JM_normalize_vector(c.x, c.y);
+	return Py_BuildValue("f", c.y);
+}
+
+
+// Return the matrix that maps two points C, P to the x-axis such that
+// C -> (0,0) and the image of P have the same distance.
+PyObject *util_hor_matrix(PyObject *C, PyObject *P)
+{
+	fz_point c = JM_point_from_py(C);
+	fz_point p = JM_point_from_py(P);
+
+	// compute (cosine, sine) of vector P-C with double precision:
+	fz_point s = JM_normalize_vector(p.x - c.x, p.y - c.y);
+
+	fz_matrix m1 = fz_make_matrix(1, 0, 0, 1, -c.x, -c.y);
+	fz_matrix m2 = fz_make_matrix(s.x, -s.y, s.y, s.x, 0, 0);
+	return JM_py_from_matrix(fz_concat(m1, m2));
+}
+
+struct Annot;
+
+// Ensure that widgets with /AA/C JavaScript are in array AcroForm/CO
+struct Annot;
+PyObject *util_ensure_widget_calc(struct Annot *annot)
+{
+	pdf_obj *PDFNAME_CO=NULL;
+	fz_try(gctx) {
+		pdf_obj *annot_obj = pdf_annot_obj(gctx, (pdf_annot *) annot);
+		pdf_document *pdf = pdf_get_bound_document(gctx, annot_obj);
+		PDFNAME_CO = pdf_new_name(gctx, "CO");  // = PDF_NAME(CO)
+		pdf_obj *acro = pdf_dict_getl(gctx,  // get AcroForm dict
+						pdf_trailer(gctx, pdf),
+						PDF_NAME(Root),
+						PDF_NAME(AcroForm),
+						NULL);
+
+		pdf_obj *CO = pdf_dict_get(gctx, acro, PDFNAME_CO);  // = AcroForm/CO
+		if (!CO) {
+			CO = pdf_dict_put_array(gctx, acro, PDFNAME_CO, 2);
+		}
+		int i, n = pdf_array_len(gctx, CO);
+		int xref, nxref, found = 0;
+		xref = pdf_to_num(gctx, annot_obj);
+		for (i = 0; i < n; i++) {
+			nxref = pdf_to_num(gctx, pdf_array_get(gctx, CO, i));
+			if (xref == nxref) {
+				found = 1;
+				break;
+			}
+		}
+		if (!found) {
+			pdf_array_push_drop(gctx, CO, pdf_new_indirect(gctx, pdf, xref, 0));
+		}
+	}
+	fz_always(gctx) {
+		pdf_drop_obj(gctx, PDFNAME_CO);
+	}
+	fz_catch(gctx) {
+		PyErr_SetString(PyExc_RuntimeError, fz_caught_message(gctx));
+		return NULL;
+	}
+	Py_RETURN_NONE;
+}
+
+
+//-----------------------------------------------------------
+// Compute Rect coordinates using different alternatives
+//-----------------------------------------------------------
+PyObject *util_make_rect(PyObject *a)
+{
+	Py_ssize_t i, n = PyTuple_GET_SIZE(a);
+	PyObject *p1, *p2, *l = a;
+	char *msg = "Rect: bad args";
+	double c[4] = { 0, 0, 0, 0 };
+	switch (n) {
+		case 0: goto exit_normal;
+		case 1: goto size1;
+		case 2: goto size2;
+		case 3: goto size31;
+		case 4: goto size4;
+		default:
+			msg = "Rect: bad seq len";
+			goto exit_error;
+	}
+
+	size4:;
+		for (i = 0; i < 4; i++) {
+			if (JM_FLOAT_ITEM(l, i, &c[i]) == 1) {
+				goto exit_error;
+			}
+		}
+		goto exit_normal;
+
+	size1:;
+		l = PyTuple_GET_ITEM(a, 0);
+		if (!PySequence_Check(l) || PySequence_Size(l) != 4) {
+			msg = "Rect: bad seq len";
+			goto exit_error;
+		}
+		goto size4;
+
+	size2:;
+		msg = "Rect: bad args";
+		p1 = PyTuple_GET_ITEM(a, 0);
+		p2 = PyTuple_GET_ITEM(a, 1);
+		if (!PySequence_Check(p1) || PySequence_Size(p1) != 2) {
+			goto exit_error;
+		}
+		if (!PySequence_Check(p2) || PySequence_Size(p2) != 2) {
+			goto exit_error;
+		}
+		if (JM_FLOAT_ITEM(p1, 0, &c[0]) == 1) goto exit_error;
+		if (JM_FLOAT_ITEM(p1, 1, &c[1]) == 1) goto exit_error;
+		if (JM_FLOAT_ITEM(p2, 0, &c[2]) == 1) goto exit_error;
+		if (JM_FLOAT_ITEM(p2, 1, &c[3]) == 1) goto exit_error;
+		goto exit_normal;
+
+	size31:;
+		p1 = PyTuple_GET_ITEM(a, 0);
+		if (PySequence_Check(p1)) goto size32;
+		if (JM_FLOAT_ITEM(a, 0, &c[0]) == 1) goto exit_error;
+		if (JM_FLOAT_ITEM(a, 1, &c[1]) == 1) goto exit_error;
+		p2 = PyTuple_GET_ITEM(a, 2);
+		if (!PySequence_Check(p2) || PySequence_Size(p2) != 2) {
+			goto exit_error;
+		}
+		if (JM_FLOAT_ITEM(p2, 0, &c[2]) == 1) goto exit_error;
+		if (JM_FLOAT_ITEM(p2, 1, &c[3]) == 1) goto exit_error;
+		goto exit_normal;
+
+	size32:;
+		if (PySequence_Size(p1) != 2) goto exit_error;
+		if (JM_FLOAT_ITEM(p1, 0, &c[0]) == 1) goto exit_error;
+		if (JM_FLOAT_ITEM(p1, 1, &c[1]) == 1) goto exit_error;
+		if (JM_FLOAT_ITEM(a, 1, &c[2]) == 1) goto exit_error;
+		if (JM_FLOAT_ITEM(a, 2, &c[3]) == 1) goto exit_error;
+		goto exit_normal;
+
+	exit_normal:;
+		for (i = 0; i < 4; i++) {
+			if (c[i] < FZ_MIN_INF_RECT) c[i] = FZ_MIN_INF_RECT;
+			if (c[i] > FZ_MAX_INF_RECT) c[i] = FZ_MAX_INF_RECT;
+		}
+		return Py_BuildValue("dddd", c[0], c[1], c[2], c[3]);
+
+	exit_error:;
+		PyErr_SetString(PyExc_ValueError, msg);
+		return NULL;
+}
+
+
+//-----------------------------------------------------------
+// Compute IRect coordinates using different alternatives
+//-----------------------------------------------------------
+PyObject *util_make_irect(PyObject *a)
+{
+	Py_ssize_t i, n = PyTuple_GET_SIZE(a);
+	PyObject *p1, *p2, *l = a;
+	char *msg = "IRect: bad args";
+	int c[4] = { 0, 0, 0, 0 };
+	switch (n) {
+		case 0: goto exit_normal;
+		case 1: goto size1;
+		case 2: goto size2;
+		case 3: goto size31;
+		case 4: goto size4;
+		default:
+			msg = "IRect: bad seq len";
+			goto exit_error;
+	}
+
+	size4:;
+		for (i = 0; i < 4; i++) {
+			if (JM_INT_ITEM(l, i, &c[i]) == 1) {
+				goto exit_error;
+			}
+		}
+		goto exit_normal;
+
+	size1:;
+		l = PyTuple_GET_ITEM(a, 0);
+		if (!PySequence_Check(l) || PySequence_Size(l) != 4) {
+			msg = "IRect: bad seq len";
+			goto exit_error;
+		}
+		goto size4;
+
+	size2:;
+		p1 = PyTuple_GET_ITEM(a, 0);
+		p2 = PyTuple_GET_ITEM(a, 1);
+		if (!PySequence_Check(p1) || PySequence_Size(p1) != 2) {
+			goto exit_error;
+		}
+		if (!PySequence_Check(p2) || PySequence_Size(p2) != 2) {
+			goto exit_error;
+		}
+		msg = "IRect: bad int values";
+		if (JM_INT_ITEM(p1, 0, &c[0]) == 1) goto exit_error;
+		if (JM_INT_ITEM(p1, 1, &c[1]) == 1) goto exit_error;
+		if (JM_INT_ITEM(p2, 0, &c[2]) == 1) goto exit_error;
+		if (JM_INT_ITEM(p2, 1, &c[3]) == 1) goto exit_error;
+		goto exit_normal;
+
+	size31:;
+		p1 = PyTuple_GET_ITEM(a, 0);
+		if (PySequence_Check(p1)) goto size32;
+		if (JM_INT_ITEM(a, 0, &c[0]) == 1) goto exit_error;
+		if (JM_INT_ITEM(a, 1, &c[1]) == 1) goto exit_error;
+		p2 = PyTuple_GET_ITEM(a, 2);
+		if (!PySequence_Check(p2) || PySequence_Size(p2) != 2) {
+			goto exit_error;
+		}
+		if (JM_INT_ITEM(p2, 0, &c[2]) == 1) goto exit_error;
+		if (JM_INT_ITEM(p2, 1, &c[3]) == 1) goto exit_error;
+		goto exit_normal;
+
+	size32:;
+		if (PySequence_Size(p1) != 2) goto exit_error;
+		if (JM_INT_ITEM(p1, 0, &c[0]) == 1) goto exit_error;
+		if (JM_INT_ITEM(p1, 1, &c[1]) == 1) goto exit_error;
+		if (JM_INT_ITEM(a, 1, &c[2]) == 1) goto exit_error;
+		if (JM_INT_ITEM(a, 2, &c[3]) == 1) goto exit_error;
+		goto exit_normal;
+
+	exit_normal:;
+		for (i = 0; i < 4; i++) {
+			if (c[i] < FZ_MIN_INF_RECT) c[i] = FZ_MIN_INF_RECT;
+			if (c[i] > FZ_MAX_INF_RECT) c[i] = FZ_MAX_INF_RECT;
+		}
+		return Py_BuildValue("iiii", c[0], c[1], c[2], c[3]);
+
+	exit_error:;
+		PyErr_SetString(PyExc_ValueError, msg);
+		return NULL;
+}
+
+
+PyObject *util_round_rect(PyObject *rect)
+{
+	return JM_py_from_irect(fz_round_rect(JM_rect_from_py(rect)));
+}
+
+
+PyObject *util_transform_rect(PyObject *rect, PyObject *matrix)
+{
+	return JM_py_from_rect(fz_transform_rect(JM_rect_from_py(rect), JM_matrix_from_py(matrix)));
+}
+
+
+PyObject *util_intersect_rect(PyObject *r1, PyObject *r2)
+{
+	return JM_py_from_rect(fz_intersect_rect(JM_rect_from_py(r1),
+												JM_rect_from_py(r2)));
+}
+
+
+PyObject *util_is_point_in_rect(PyObject *p, PyObject *r)
+{
+	return JM_BOOL(fz_is_point_inside_rect(JM_point_from_py(p), JM_rect_from_py(r)));
+}
+
+
+PyObject *util_include_point_in_rect(PyObject *r, PyObject *p)
+{
+	return JM_py_from_rect(fz_include_point_in_rect(JM_rect_from_py(r),
+												JM_point_from_py(p)));
+}
+
+
+PyObject *util_point_in_quad(PyObject *P, PyObject *Q)
+{
+	fz_point p = JM_point_from_py(P);
+	fz_quad q = JM_quad_from_py(Q);
+	return JM_BOOL(fz_is_point_inside_quad(p, q));
+}
+
+
+PyObject *util_transform_point(PyObject *point, PyObject *matrix)
+{
+	return JM_py_from_point(fz_transform_point(JM_point_from_py(point), JM_matrix_from_py(matrix)));
+}
+
+
+PyObject *util_union_rect(PyObject *r1, PyObject *r2)
+{
+	return JM_py_from_rect(fz_union_rect(JM_rect_from_py(r1),
+											JM_rect_from_py(r2)));
+}
+
+
+PyObject *util_concat_matrix(PyObject *m1, PyObject *m2)
+{
+	return JM_py_from_matrix(fz_concat(JM_matrix_from_py(m1),
+										JM_matrix_from_py(m2)));
+}
+
+
+PyObject *util_invert_matrix(PyObject *matrix)
+{
+	fz_matrix src = JM_matrix_from_py(matrix);
+	float a = src.a;
+	float det = a * src.d - src.b * src.c;
+	if (det < -FLT_EPSILON || det > FLT_EPSILON)
+	{
+		fz_matrix dst;
+		float rdet = 1 / det;
+		dst.a = src.d * rdet;
+		dst.b = -src.b * rdet;
+		dst.c = -src.c * rdet;
+		dst.d = a * rdet;
+		a = -src.e * dst.a - src.f * dst.c;
+		dst.f = -src.e * dst.b - src.f * dst.d;
+		dst.e = a;
+		return Py_BuildValue("iN", 0, JM_py_from_matrix(dst));
+	}
+	return Py_BuildValue("(i, ())", 1);
+}
+
+
+PyObject *util_measure_string(const char *text, const char *fontname, double fontsize, int encoding)
+{
+	double w = 0;
+	fz_font *font = NULL;
+	fz_try(gctx) {
+		font = fz_new_base14_font(gctx, fontname);
+		while (*text)
+		{
+			int c, g;
+			text += fz_chartorune(&c, text);
+			switch (encoding)
+			{
+				case PDF_SIMPLE_ENCODING_GREEK:
+					c = fz_iso8859_7_from_unicode(c); break;
+				case PDF_SIMPLE_ENCODING_CYRILLIC:
+					c = fz_windows_1251_from_unicode(c); break;
+				default:
+					c = fz_windows_1252_from_unicode(c); break;
+			}
+			if (c < 0) c = 0xB7;
+			g = fz_encode_character(gctx, font, c);
+			w += (double) fz_advance_glyph(gctx, font, g, 0);
+		}
+	}
+	fz_always(gctx) {
+		fz_drop_font(gctx, font);
+	}
+	fz_catch(gctx) {
+		return PyFloat_FromDouble(0);
+	}
+	return PyFloat_FromDouble(w * fontsize);
+}
+
+%}
+
+%{
+// Global Constants - Python dictionary keys
+PyObject *dictkey_align;
+PyObject *dictkey_ascender;
+PyObject *dictkey_bbox;
+PyObject *dictkey_blocks;
+PyObject *dictkey_bpc;
+PyObject *dictkey_c;
+PyObject *dictkey_chars;
+PyObject *dictkey_color;
+PyObject *dictkey_colorspace;
+PyObject *dictkey_content;
+PyObject *dictkey_creationDate;
+PyObject *dictkey_cs_name;
+PyObject *dictkey_da;
+PyObject *dictkey_dashes;
+PyObject *dictkey_desc;
+PyObject *dictkey_descender;
+PyObject *dictkey_dir;
+PyObject *dictkey_effect;
+PyObject *dictkey_ext;
+PyObject *dictkey_filename;
+PyObject *dictkey_fill;
+PyObject *dictkey_flags;
+PyObject *dictkey_font;
+PyObject *dictkey_glyph;
+PyObject *dictkey_height;
+PyObject *dictkey_id;
+PyObject *dictkey_image;
+PyObject *dictkey_items;
+PyObject *dictkey_length;
+PyObject *dictkey_lines;
+PyObject *dictkey_matrix;
+PyObject *dictkey_modDate;
+PyObject *dictkey_name;
+PyObject *dictkey_number;
+PyObject *dictkey_origin;
+PyObject *dictkey_rect;
+PyObject *dictkey_size;
+PyObject *dictkey_smask;
+PyObject *dictkey_spans;
+PyObject *dictkey_stroke;
+PyObject *dictkey_style;
+PyObject *dictkey_subject;
+PyObject *dictkey_text;
+PyObject *dictkey_title;
+PyObject *dictkey_type;
+PyObject *dictkey_ufilename;
+PyObject *dictkey_width;
+PyObject *dictkey_wmode;
+PyObject *dictkey_xref;
+PyObject *dictkey_xres;
+PyObject *dictkey_yres;
+%}