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Fix incorrect font scale and glyph position in Type 3 fonts

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The PDF file referenced by bug 26186 contains a Type 3 font with non
identity font matrix and a "1/2" glyph created by drawing the "1" and
"2" from a Type 1 font. This combination exposed a bug in the font
scale and glyph position in _cairo_type3_glyph_surface_show_glyphs
when printing user font glyphs.
This commit is contained in:
Adrian Johnson 2010-01-24 22:23:26 +10:30
parent ea7fda442c
commit b7550bf0f1
1 changed files with 5 additions and 16 deletions
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21
src/cairo-type3-glyph-surface.c
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@ -291,28 +291,17 @@ _cairo_type3_glyph_surface_show_glyphs (void *abstract_surface,
cairo_type3_glyph_surface_t *surface = abstract_surface;
cairo_int_status_t status;
cairo_scaled_font_t *font;
cairo_matrix_t new_ctm, ctm_inverse;
int i;
cairo_matrix_t new_scale, invert_y_axis;
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return status;
for (i = 0; i < num_glyphs; i++) {
cairo_matrix_transform_point (&surface->cairo_to_pdf,
&glyphs[i].x, &glyphs[i].y);
}
/* We require the matrix to be invertable. */
ctm_inverse = scaled_font->ctm;
status = cairo_matrix_invert (&ctm_inverse);
if (unlikely (status))
return CAIRO_INT_STATUS_IMAGE_FALLBACK;
cairo_matrix_multiply (&new_ctm, &scaled_font->ctm, &ctm_inverse);
cairo_matrix_init_scale (&invert_y_axis, 1, -1);
cairo_matrix_multiply (&new_scale, &scaled_font->scale, &invert_y_axis);
font = cairo_scaled_font_create (scaled_font->font_face,
&scaled_font->font_matrix,
&new_ctm,
&new_scale,
&surface->cairo_to_pdf,
&scaled_font->options);
if (unlikely (font->status))
return font->status;