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461
app/.venv/Lib/site-packages/weasyprint/text/ffi.py
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461
app/.venv/Lib/site-packages/weasyprint/text/ffi.py
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"""Imports of dynamic libraries used for text layout."""
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import os
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from contextlib import suppress
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import cffi
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ffi = cffi.FFI()
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ffi.cdef('''
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// HarfBuzz
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typedef ... hb_font_t;
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typedef ... hb_face_t;
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typedef ... hb_blob_t;
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typedef uint32_t hb_codepoint_t;
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hb_blob_t * hb_face_reference_blob (hb_face_t *face);
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unsigned int hb_face_get_index (const hb_face_t *face);
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unsigned int hb_face_get_upem (const hb_face_t *face);
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const char * hb_blob_get_data (hb_blob_t *blob, unsigned int *length);
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bool hb_ot_color_has_png (hb_face_t *face);
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hb_blob_t * hb_ot_color_glyph_reference_png (
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hb_font_t *font, hb_codepoint_t glyph);
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bool hb_ot_color_has_svg (hb_face_t *face);
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hb_blob_t * hb_ot_color_glyph_reference_svg (
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hb_face_t *face, hb_codepoint_t glyph);
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void hb_blob_destroy (hb_blob_t *blob);
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// Pango
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typedef unsigned int guint;
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typedef int gint;
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typedef char gchar;
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typedef gint gboolean;
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typedef void* gpointer;
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typedef ... PangoLayout;
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typedef ... PangoContext;
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typedef ... PangoFontMap;
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typedef ... PangoFontMetrics;
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typedef ... PangoLanguage;
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typedef ... PangoTabArray;
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typedef ... PangoFontDescription;
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typedef ... PangoLayoutIter;
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typedef ... PangoAttrList;
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typedef ... PangoAttrClass;
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typedef ... PangoFont;
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typedef guint PangoGlyph;
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typedef gint PangoGlyphUnit;
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const guint PANGO_GLYPH_EMPTY = 0x0FFFFFFF;
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const guint PANGO_GLYPH_UNKNOWN_FLAG = 0x10000000;
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typedef enum {
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PANGO_STYLE_NORMAL,
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PANGO_STYLE_OBLIQUE,
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PANGO_STYLE_ITALIC
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} PangoStyle;
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typedef enum {
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PANGO_WEIGHT_THIN = 100,
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PANGO_WEIGHT_ULTRALIGHT = 200,
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PANGO_WEIGHT_LIGHT = 300,
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PANGO_WEIGHT_BOOK = 380,
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PANGO_WEIGHT_NORMAL = 400,
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PANGO_WEIGHT_MEDIUM = 500,
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PANGO_WEIGHT_SEMIBOLD = 600,
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PANGO_WEIGHT_BOLD = 700,
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PANGO_WEIGHT_ULTRABOLD = 800,
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PANGO_WEIGHT_HEAVY = 900,
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PANGO_WEIGHT_ULTRAHEAVY = 1000
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} PangoWeight;
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typedef enum {
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PANGO_FONT_MASK_SIZE = 1 << 5,
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PANGO_FONT_MASK_GRAVITY = 1 << 6,
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PANGO_FONT_MASK_VARIATIONS = 1 << 7
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} PangoFontMask;
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typedef enum {
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PANGO_STRETCH_ULTRA_CONDENSED,
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PANGO_STRETCH_EXTRA_CONDENSED,
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PANGO_STRETCH_CONDENSED,
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PANGO_STRETCH_SEMI_CONDENSED,
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PANGO_STRETCH_NORMAL,
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PANGO_STRETCH_SEMI_EXPANDED,
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PANGO_STRETCH_EXPANDED,
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PANGO_STRETCH_EXTRA_EXPANDED,
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PANGO_STRETCH_ULTRA_EXPANDED
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} PangoStretch;
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typedef enum {
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PANGO_WRAP_WORD,
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PANGO_WRAP_CHAR,
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PANGO_WRAP_WORD_CHAR
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} PangoWrapMode;
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typedef enum {
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PANGO_TAB_LEFT
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} PangoTabAlign;
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typedef enum {
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PANGO_ELLIPSIZE_NONE,
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PANGO_ELLIPSIZE_START,
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PANGO_ELLIPSIZE_MIDDLE,
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PANGO_ELLIPSIZE_END
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} PangoEllipsizeMode;
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typedef struct GSList {
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gpointer data;
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struct GSList *next;
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} GSList;
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typedef struct {
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void *shape_engine;
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void *lang_engine;
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PangoFont *font;
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guint level;
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guint gravity;
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guint flags;
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guint script;
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PangoLanguage *language;
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GSList *extra_attrs;
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} PangoAnalysis;
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typedef struct {
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gint offset;
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gint length;
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gint num_chars;
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PangoAnalysis analysis;
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} PangoItem;
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typedef struct {
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PangoGlyphUnit width;
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PangoGlyphUnit x_offset;
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PangoGlyphUnit y_offset;
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} PangoGlyphGeometry;
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typedef struct {
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guint is_cluster_start : 1;
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} PangoGlyphVisAttr;
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typedef struct {
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PangoGlyph glyph;
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PangoGlyphGeometry geometry;
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PangoGlyphVisAttr attr;
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} PangoGlyphInfo;
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typedef struct {
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gint num_glyphs;
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PangoGlyphInfo *glyphs;
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gint *log_clusters;
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} PangoGlyphString;
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typedef struct {
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PangoItem *item;
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PangoGlyphString *glyphs;
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} PangoGlyphItem;
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typedef struct GSListRuns {
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PangoGlyphItem *data;
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struct GSListRuns *next;
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} GSListRuns;
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typedef struct {
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const PangoAttrClass *klass;
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guint start_index;
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guint end_index;
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} PangoAttribute;
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typedef struct {
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PangoLayout *layout;
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gint start_index;
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gint length;
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GSListRuns *runs;
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guint is_paragraph_start : 1;
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guint resolved_dir : 3;
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} PangoLayoutLine;
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typedef struct {
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int x;
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int y;
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int width;
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int height;
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} PangoRectangle;
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typedef struct {
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guint is_line_break: 1;
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guint is_mandatory_break : 1;
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guint is_char_break : 1;
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guint is_white : 1;
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guint is_cursor_position : 1;
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guint is_word_start : 1;
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guint is_word_end : 1;
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guint is_sentence_boundary : 1;
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guint is_sentence_start : 1;
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guint is_sentence_end : 1;
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guint backspace_deletes_character : 1;
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guint is_expandable_space : 1;
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guint is_word_boundary : 1;
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} PangoLogAttr;
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int pango_version (void);
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double pango_units_to_double (int i);
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int pango_units_from_double (double d);
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void g_object_unref (gpointer object);
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void g_type_init (void);
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PangoLayout * pango_layout_new (PangoContext *context);
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void pango_layout_set_width (PangoLayout *layout, int width);
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PangoAttrList * pango_layout_get_attributes(PangoLayout *layout);
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void pango_layout_set_attributes (
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PangoLayout *layout, PangoAttrList *attrs);
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void pango_layout_set_text (
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PangoLayout *layout, const char *text, int length);
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void pango_layout_set_tabs (
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PangoLayout *layout, PangoTabArray *tabs);
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void pango_layout_set_font_description (
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PangoLayout *layout, const PangoFontDescription *desc);
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void pango_layout_set_wrap (
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PangoLayout *layout, PangoWrapMode wrap);
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void pango_layout_set_single_paragraph_mode (
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PangoLayout *layout, gboolean setting);
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int pango_layout_get_baseline (PangoLayout *layout);
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PangoLayoutLine * pango_layout_get_line_readonly (
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PangoLayout *layout, int line);
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hb_font_t * pango_font_get_hb_font (PangoFont *font);
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PangoFontDescription * pango_font_description_new (void);
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void pango_font_description_free (PangoFontDescription *desc);
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PangoFontDescription * pango_font_description_copy (
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const PangoFontDescription *desc);
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PangoFontMap* pango_font_get_font_map (PangoFont* font);
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void pango_font_description_set_family (
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PangoFontDescription *desc, const char *family);
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void pango_font_description_set_style (
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PangoFontDescription *desc, PangoStyle style);
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void pango_font_description_set_stretch (
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PangoFontDescription *desc, PangoStretch stretch);
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void pango_font_description_set_weight (
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PangoFontDescription *desc, PangoWeight weight);
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void pango_font_description_set_absolute_size (
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PangoFontDescription *desc, double size);
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void pango_font_description_set_variations (
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PangoFontDescription* desc, const char* variations);
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PangoStyle pango_font_description_get_style (
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const PangoFontDescription *desc);
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const char* pango_font_description_get_variations (
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const PangoFontDescription* desc);
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PangoWeight pango_font_description_get_weight (
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const PangoFontDescription* desc);
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int pango_font_description_get_size (PangoFontDescription *desc);
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void pango_font_description_unset_fields (
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PangoFontDescription* desc, PangoFontMask to_unset);
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int pango_glyph_string_get_width (PangoGlyphString *glyphs);
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char * pango_font_description_to_string (
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const PangoFontDescription *desc);
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PangoFontDescription * pango_font_describe (PangoFont *font);
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const char * pango_font_description_get_family (
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const PangoFontDescription *desc);
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guint pango_font_description_hash (const PangoFontDescription *desc);
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PangoContext * pango_context_new ();
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PangoContext * pango_font_map_create_context (PangoFontMap *fontmap);
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PangoFont* pango_font_map_load_font (
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PangoFontMap* fontmap, PangoContext* context,
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const PangoFontDescription* desc);
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PangoFontMetrics * pango_context_get_metrics (
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PangoContext *context, const PangoFontDescription *desc,
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PangoLanguage *language);
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PangoFontMetrics * pango_font_get_metrics (
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PangoFont *font, PangoLanguage *language);
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void pango_font_metrics_unref (PangoFontMetrics *metrics);
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int pango_font_metrics_get_ascent (PangoFontMetrics *metrics);
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int pango_font_metrics_get_descent (PangoFontMetrics *metrics);
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int pango_font_metrics_get_underline_thickness (
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PangoFontMetrics *metrics);
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int pango_font_metrics_get_underline_position (
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PangoFontMetrics *metrics);
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int pango_font_metrics_get_strikethrough_thickness (
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PangoFontMetrics *metrics);
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int pango_font_metrics_get_strikethrough_position (
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PangoFontMetrics *metrics);
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void pango_font_get_glyph_extents (
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PangoFont *font, PangoGlyph glyph, PangoRectangle *ink_rect,
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PangoRectangle *logical_rect);
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void pango_context_set_round_glyph_positions (
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PangoContext *context, gboolean round_positions);
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PangoAttrList * pango_attr_list_new (void);
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void pango_attr_list_unref (PangoAttrList *list);
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void pango_attr_list_insert (
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PangoAttrList *list, PangoAttribute *attr);
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void pango_attr_list_change (
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PangoAttrList *list, PangoAttribute *attr);
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PangoAttribute * pango_attr_font_features_new (const gchar *features);
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PangoAttribute * pango_attr_letter_spacing_new (int letter_spacing);
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PangoAttribute * pango_attr_insert_hyphens_new (gboolean insert_hyphens);
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void pango_attribute_destroy (PangoAttribute *attr);
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PangoTabArray * pango_tab_array_new_with_positions (
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gint size, gboolean positions_in_pixels, PangoTabAlign first_alignment,
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gint first_position, ...);
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void pango_tab_array_free (PangoTabArray *tab_array);
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PangoLanguage * pango_language_from_string (const char *language);
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PangoLanguage * pango_language_get_default (void);
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void pango_context_set_language (
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PangoContext *context, PangoLanguage *language);
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void pango_context_set_font_map (
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PangoContext *context, PangoFontMap *font_map);
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void pango_layout_line_get_extents (
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PangoLayoutLine *line,
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PangoRectangle *ink_rect, PangoRectangle *logical_rect);
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PangoContext * pango_layout_get_context (PangoLayout *layout);
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void pango_layout_set_ellipsize (
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PangoLayout *layout,
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PangoEllipsizeMode ellipsize);
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void pango_get_log_attrs (
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const char *text, int length, int level, PangoLanguage *language,
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PangoLogAttr *log_attrs, int attrs_len);
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// FontConfig
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typedef int FcBool;
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typedef struct _FcConfig FcConfig;
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typedef struct _FcPattern FcPattern;
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typedef struct _FcStrList FcStrList;
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typedef unsigned char FcChar8;
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typedef enum {
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FcResultMatch, FcResultNoMatch, FcResultTypeMismatch, FcResultNoId,
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FcResultOutOfMemory
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} FcResult;
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||||
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typedef enum {
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FcMatchPattern, FcMatchFont, FcMatchScan
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} FcMatchKind;
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||||
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typedef struct _FcFontSet {
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int nfont;
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int sfont;
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||||
FcPattern **fonts;
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} FcFontSet;
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typedef enum _FcSetName {
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FcSetSystem = 0,
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FcSetApplication = 1
|
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} FcSetName;
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FcConfig * FcInitLoadConfigAndFonts (void);
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void FcConfigDestroy (FcConfig *config);
|
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FcBool FcConfigAppFontAddFile (
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FcConfig *config, const FcChar8 *file);
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FcConfig * FcConfigGetCurrent (void);
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FcBool FcConfigSetCurrent (FcConfig *config);
|
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FcBool FcConfigParseAndLoad (
|
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FcConfig *config, const FcChar8 *file, FcBool complain);
|
||||
|
||||
FcFontSet * FcConfigGetFonts(FcConfig *config, FcSetName set);
|
||||
FcStrList * FcConfigGetConfigFiles(FcConfig *config);
|
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FcChar8 * FcStrListNext(FcStrList *list);
|
||||
|
||||
void FcDefaultSubstitute (FcPattern *pattern);
|
||||
FcBool FcConfigSubstitute (
|
||||
FcConfig *config, FcPattern *p, FcMatchKind kind);
|
||||
|
||||
FcPattern * FcPatternCreate (void);
|
||||
FcPattern * FcPatternDestroy (FcPattern *p);
|
||||
FcBool FcPatternAddString (
|
||||
FcPattern *p, const char *object, const FcChar8 *s);
|
||||
FcResult FcPatternGetString (
|
||||
FcPattern *p, const char *object, int n, FcChar8 **s);
|
||||
FcPattern * FcFontMatch (
|
||||
FcConfig *config, FcPattern *p, FcResult *result);
|
||||
|
||||
|
||||
// PangoFT2
|
||||
|
||||
typedef ... PangoFcFont;
|
||||
typedef ... PangoFcFontMap;
|
||||
|
||||
PangoFontMap * pango_ft2_font_map_new (void);
|
||||
void pango_fc_font_map_set_config (
|
||||
PangoFcFontMap *fcfontmap, FcConfig *fcconfig);
|
||||
void pango_fc_font_map_config_changed (PangoFcFontMap *fcfontmap);
|
||||
hb_face_t* pango_fc_font_map_get_hb_face (
|
||||
PangoFcFontMap* fcfontmap, PangoFcFont* fcfont);
|
||||
''')
|
||||
|
||||
|
||||
def _dlopen(ffi, *names):
|
||||
"""Try various names for the same library, for different platforms."""
|
||||
for name in names:
|
||||
with suppress(OSError):
|
||||
return ffi.dlopen(name)
|
||||
# Re-raise the exception.
|
||||
print(
|
||||
'\n-----\n\n'
|
||||
'WeasyPrint could not import some external libraries. Please '
|
||||
'carefully follow the installation steps before reporting an issue:\n'
|
||||
'https://doc.courtbouillon.org/weasyprint/stable/'
|
||||
'first_steps.html#installation\n'
|
||||
'https://doc.courtbouillon.org/weasyprint/stable/'
|
||||
'first_steps.html#troubleshooting',
|
||||
'\n\n-----\n') # pragma: no cover
|
||||
return ffi.dlopen(names[0]) # pragma: no cover
|
||||
|
||||
|
||||
if hasattr(os, 'add_dll_directory'): # pragma: no cover
|
||||
dll_directories = os.getenv(
|
||||
'WEASYPRINT_DLL_DIRECTORIES',
|
||||
'C:\\Program Files\\GTK3-Runtime Win64\\bin').split(';')
|
||||
for dll_directory in dll_directories:
|
||||
with suppress((OSError, FileNotFoundError)):
|
||||
os.add_dll_directory(dll_directory)
|
||||
|
||||
gobject = _dlopen(
|
||||
ffi, 'gobject-2.0-0', 'gobject-2.0', 'libgobject-2.0-0',
|
||||
'libgobject-2.0.so.0', 'libgobject-2.0.dylib', 'libgobject-2.0-0.dll')
|
||||
pango = _dlopen(
|
||||
ffi, 'pango-1.0-0', 'pango-1.0', 'libpango-1.0-0', 'libpango-1.0.so.0',
|
||||
'libpango-1.0.dylib', 'libpango-1.0-0.dll')
|
||||
harfbuzz = _dlopen(
|
||||
ffi, 'harfbuzz', 'harfbuzz-0.0', 'libharfbuzz-0',
|
||||
'libharfbuzz.so.0', 'libharfbuzz.so.0', 'libharfbuzz.0.dylib',
|
||||
'libharfbuzz-0.dll')
|
||||
fontconfig = _dlopen(
|
||||
ffi, 'fontconfig-1', 'fontconfig', 'libfontconfig', 'libfontconfig.so.1',
|
||||
'libfontconfig.1.dylib', 'libfontconfig-1.dll')
|
||||
pangoft2 = _dlopen(
|
||||
ffi, 'pangoft2-1.0-0', 'pangoft2-1.0', 'libpangoft2-1.0-0',
|
||||
'libpangoft2-1.0.so.0', 'libpangoft2-1.0.dylib', 'libpangoft2-1.0-0.dll')
|
||||
|
||||
gobject.g_type_init()
|
||||
|
||||
units_to_double = pango.pango_units_to_double
|
||||
units_from_double = pango.pango_units_from_double
|
||||
|
||||
|
||||
def unicode_to_char_p(string):
|
||||
"""Return ``(pointer, bytestring)``.
|
||||
|
||||
The byte string must live at least as long as the pointer is used.
|
||||
|
||||
"""
|
||||
bytestring = string.encode().replace(b'\x00', b'')
|
||||
return ffi.new('char[]', bytestring), bytestring
|
||||
Reference in New Issue
Block a user