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https://gitlab.freedesktop.org/cairo/cairo.git
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Add code to emit type1 dicts to the pdf backend.
This commit is contained in:
Kristian Høgsberg
Kristian Høgsberg
parent
c36de5b7c5
commit
466d3da4ef
3 changed files with 120 additions and 4 deletions
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@ -1663,6 +1663,112 @@ _cairo_pdf_surface_write_pages (cairo_pdf_surface_t *surface)
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"endobj\r\n");
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}
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static cairo_status_t
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_cairo_pdf_surface_emit_type1_font_subset (cairo_pdf_surface_t *surface,
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cairo_scaled_font_subset_t *font_subset)
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{
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cairo_pdf_resource_t stream, descriptor, subset_resource;
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cairo_status_t status;
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cairo_pdf_font_t font;
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cairo_type1_subset_t subset;
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unsigned long length, compressed_length;
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char *compressed;
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int i;
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status = _cairo_type1_subset_init (&subset, font_subset);
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if (status)
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return status;
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/* We ignore the zero-trailer and set Length3 to 0. */
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length = subset.header_length + subset.data_length;
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compressed = compress_dup (subset.data, length, &compressed_length);
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if (compressed == NULL) {
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_cairo_type1_subset_fini (&subset);
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return CAIRO_STATUS_NO_MEMORY;
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}
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stream = _cairo_pdf_surface_new_object (surface);
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_cairo_output_stream_printf (surface->output,
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"%d 0 obj\r\n"
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"<< /Filter /FlateDecode\r\n"
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" /Length %lu\r\n"
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" /Length1 %lu\r\n"
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" /Length2 %lu\r\n"
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" /Length3 0\r\n"
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">>\r\n"
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"stream\r\n",
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stream.id,
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compressed_length,
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subset.header_length,
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subset.data_length);
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_cairo_output_stream_write (surface->output, compressed, compressed_length);
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_cairo_output_stream_printf (surface->output,
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"\r\n"
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"endstream\r\n"
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"endobj\r\n");
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free (compressed);
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descriptor = _cairo_pdf_surface_new_object (surface);
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_cairo_output_stream_printf (surface->output,
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"%d 0 obj\r\n"
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"<< /Type /FontDescriptor\r\n"
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" /FontName /%s\r\n"
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" /Flags 4\r\n"
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" /FontBBox [ %ld %ld %ld %ld ]\r\n"
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" /ItalicAngle 0\r\n"
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" /Ascent %ld\r\n"
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" /Descent %ld\r\n"
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" /CapHeight 500\r\n"
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" /StemV 80\r\n"
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" /StemH 80\r\n"
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" /FontFile %u 0 R\r\n"
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">>\r\n"
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"endobj\r\n",
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descriptor.id,
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subset.base_font,
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subset.x_min,
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subset.y_min,
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subset.x_max,
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subset.y_max,
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subset.ascent,
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subset.descent,
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stream.id);
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subset_resource = _cairo_pdf_surface_new_object (surface);
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_cairo_output_stream_printf (surface->output,
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"%d 0 obj\r\n"
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"<< /Type /Font\r\n"
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" /Subtype /Type1\r\n"
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" /BaseFont /%s\r\n"
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" /FirstChar 0\r\n"
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" /LastChar %d\r\n"
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" /FontDescriptor %d 0 R\r\n"
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" /Widths [",
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subset_resource.id,
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subset.base_font,
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font_subset->num_glyphs,
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descriptor.id);
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for (i = 0; i < font_subset->num_glyphs; i++)
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_cairo_output_stream_printf (surface->output,
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" %d",
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subset.widths[i]);
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_cairo_output_stream_printf (surface->output,
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" ]\r\n"
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">>\r\n"
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"endobj\r\n");
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font.font_id = font_subset->font_id;
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font.subset_id = font_subset->subset_id;
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font.subset_resource = subset_resource;
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_cairo_array_append (&surface->fonts, &font);
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_cairo_type1_subset_fini (&subset);
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return CAIRO_STATUS_SUCCESS;
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}
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static cairo_status_t
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_cairo_pdf_surface_emit_truetype_font_subset (cairo_pdf_surface_t *surface,
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cairo_scaled_font_subset_t *font_subset)
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@ -1919,6 +2025,10 @@ _cairo_pdf_surface_emit_font_subset (cairo_scaled_font_subset_t *font_subset,
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cairo_pdf_surface_t *surface = closure;
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cairo_status_t status;
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status = _cairo_pdf_surface_emit_type1_font_subset (surface, font_subset);
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if (status != CAIRO_INT_STATUS_UNSUPPORTED)
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return;
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status = _cairo_pdf_surface_emit_truetype_font_subset (surface, font_subset);
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if (status != CAIRO_INT_STATUS_UNSUPPORTED)
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return;
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@ -228,7 +228,9 @@ typedef struct _cairo_type1_subset {
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long x_min, y_min, x_max, y_max;
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long ascent, descent;
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char *data;
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unsigned long header_length;
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unsigned long data_length;
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unsigned long trailer_length;
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} cairo_type1_subset_t;
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/**
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@ -978,8 +978,8 @@ _cairo_type1_subset_init (cairo_type1_subset_t *type1_subset,
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if (status)
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return status;
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for (i = 0; i < font->scaled_font_subset->num_glyphs; i++) {
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parent_glyph = font->scaled_font_subset->glyphs[i];
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for (i = 0; i < scaled_font_subset->num_glyphs; i++) {
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parent_glyph = scaled_font_subset->glyphs[i];
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cairo_type1_font_subset_use_glyph (font, parent_glyph);
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}
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@ -1004,14 +1004,18 @@ _cairo_type1_subset_init (cairo_type1_subset_t *type1_subset,
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type1_subset->ascent = font->base.ascent;
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type1_subset->descent = font->base.descent;
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length = font->contents.num_elements;
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length = font->base.header_size + font->base.data_size +
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font->base.trailer_size;
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type1_subset->data = malloc (length);
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if (type1_subset->data == NULL)
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goto fail3;
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memcpy (type1_subset->data,
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_cairo_array_index (&font->contents, 0), length);
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type1_subset->data_length = length;
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type1_subset->header_length = font->base.header_size;
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type1_subset->data_length = font->base.data_size;
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type1_subset->trailer_length = font->base.trailer_size;
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return CAIRO_STATUS_SUCCESS;
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