diff options
Diffstat (limited to 'pango/pangoft2-render.c')
-rw-r--r-- | pango/pangoft2-render.c | 114 |
1 files changed, 106 insertions, 8 deletions
diff --git a/pango/pangoft2-render.c b/pango/pangoft2-render.c index 5aa1872e..2a814861 100644 --- a/pango/pangoft2-render.c +++ b/pango/pangoft2-render.c @@ -100,20 +100,97 @@ pango_ft2_free_rendered_glyph (PangoFT2RenderedGlyph *rendered) } static PangoFT2RenderedGlyph * +pango_ft2_font_render_box_glyph (int width, + int height, + int top) +{ + PangoFT2RenderedGlyph *box; + int i, j, offset1, offset2, line_width; + + line_width = MAX ((height + 43) / 44, 1); + if (width < 1 || height < 1) + line_width = 0; + + box = g_slice_new (PangoFT2RenderedGlyph); + + box->bitmap_left = 0; + box->bitmap_top = top; + + box->bitmap.pixel_mode = ft_pixel_mode_grays; + + box->bitmap.width = width; + box->bitmap.rows = height; + box->bitmap.pitch = height; + + box->bitmap.buffer = g_malloc0 (box->bitmap.rows * box->bitmap.pitch); + + /* draw the box */ + for (j = 0; j < line_width; j++) + { + offset1 = box->bitmap.pitch * (MIN (1 + j, height - 1)); + offset2 = box->bitmap.pitch * (MAX (box->bitmap.rows - 2 - j, 0)); + for (i = 1; + i < box->bitmap.width - 1; + i++) + { + box->bitmap.buffer[offset1 + i] = 0xff; + box->bitmap.buffer[offset2 + i] = 0xff; + } + } + for (j = 0; j < line_width; j++) + { + offset1 = MIN (1 + j, width - 1); + offset2 = MAX (box->bitmap.width - 2 - j, 0); + for (i = box->bitmap.pitch; + i < (box->bitmap.rows - 1) * box->bitmap.pitch; + i += box->bitmap.pitch) + { + box->bitmap.buffer[offset1 + i] = 0xff; + box->bitmap.buffer[offset2 + i] = 0xff; + } + } + + return box; +} + +static PangoFT2RenderedGlyph * pango_ft2_font_render_glyph (PangoFont *font, int glyph_index) { - PangoFT2RenderedGlyph *rendered; FT_Face face; - rendered = g_slice_new (PangoFT2RenderedGlyph); + if (glyph_index & PANGO_GLYPH_UNKNOWN_FLAG) + { + static PangoFT2RenderedGlyph *box; + PangoFontMetrics *metrics; + + if (!font) + goto generic_box; + + metrics = pango_font_get_metrics (font, NULL); + if (!metrics) + goto generic_box; + + /* this box gets cached, so don't bother with static'ing it. + */ + + box = pango_ft2_font_render_box_glyph (PANGO_PIXELS (metrics->approximate_char_width), + PANGO_PIXELS (metrics->ascent + metrics->descent), + PANGO_PIXELS (metrics->ascent)); + pango_font_metrics_unref (metrics); + + return box; + } face = pango_ft2_font_get_face (font); if (face) { + PangoFT2RenderedGlyph *rendered; PangoFT2Font *ft2font = (PangoFT2Font *) font; + rendered = g_slice_new (PangoFT2RenderedGlyph); + /* Draw glyph */ FT_Load_Glyph (face, glyph_index, ft2font->load_flags); FT_Render_Glyph (face->glyph, @@ -125,11 +202,23 @@ pango_ft2_font_render_glyph (PangoFont *font, face->glyph->bitmap.rows * face->glyph->bitmap.pitch); rendered->bitmap_left = face->glyph->bitmap_left; rendered->bitmap_top = face->glyph->bitmap_top; + + return rendered; } else - g_warning ("couldn't get face for PangoFT2Face, expect ugly output"); + { + static PangoFT2RenderedGlyph *box = NULL; + + generic_box: + if (!box) + { + box = pango_ft2_font_render_box_glyph (PANGO_UNKNOWN_GLYPH_WIDTH, + PANGO_UNKNOWN_GLYPH_HEIGHT, + PANGO_UNKNOWN_GLYPH_HEIGHT); + } - return rendered; + return box; + } } static void @@ -151,9 +240,18 @@ pango_ft2_renderer_draw_glyph (PangoRenderer *renderer, int ix, iy; if (glyph & PANGO_GLYPH_UNKNOWN_FLAG) - glyph = PANGO_GLYPH_NULL; - if (glyph == PANGO_GLYPH_NULL) - return; + { + FT_Face face = pango_ft2_font_get_face (font); + if (face && FT_IS_SFNT (face)) + glyph = pango_ft2_get_unknown_glyph (font); + else + { + /* Since we only draw an empty box for FT2 renderer, + * unify the rendered bitmaps in the cache. + */ + glyph = PANGO_GLYPH_UNKNOWN_FLAG; + } + } rendered_glyph = _pango_ft2_font_get_cache_glyph_data (font, glyph); add_glyph_to_cache = FALSE; @@ -588,8 +686,8 @@ pango_ft2_render_transformed (FT_Bitmap *bitmap, PangoRenderer *renderer; g_return_if_fail (bitmap != NULL); - g_return_if_fail (PANGO_FT2_IS_FONT (font)); g_return_if_fail (glyphs != NULL); + g_return_if_fail (PANGO_FT2_IS_FONT (font)); fontmap = PANGO_FC_FONT (font)->fontmap; renderer = _pango_ft2_font_map_get_renderer (PANGO_FT2_FONT_MAP (fontmap)); |