[uniscribe] Cleanup backend
This commit is contained in:
Behdad Esfahbod
parent
f1f848e2e4
commit
bf3eef540f
2
TODO
2
TODO
@ -29,6 +29,8 @@ API issues to fix before 1.0:
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API to add (maybe after 1.0):
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============================
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- Add Uniscribe face / font get API
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- BCP 47 language handling / API (language_matches?)
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- Add hb_face_get_glyph_count()?
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@ -91,6 +91,108 @@ populate_log_font (LOGFONTW *lf,
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return TRUE;
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}
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static struct hb_uniscribe_face_data_t{
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HANDLE fh;
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} _hb_uniscribe_face_data_nil = {0};
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static hb_user_data_key_t uniscribe_face_data_key;
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static void
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_hb_uniscribe_face_data_destroy (hb_uniscribe_face_data_t *data)
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{
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if (data->fh)
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RemoveFontMemResourceEx (data->fh);
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free (data);
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}
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static hb_uniscribe_face_data_t *
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_hb_uniscribe_face_get_data (hb_face_t *face)
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{
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hb_uniscribe_face_data_t *data = (hb_uniscribe_face_data_t *) hb_face_get_user_data (face, &uniscribe_face_data_key);
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if (likely (data)) return data;
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data = (hb_uniscribe_face_data_t *) calloc (1, sizeof (hb_uniscribe_face_data_t));
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if (unlikely (!data))
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return &_hb_uniscribe_face_data_nil;
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hb_blob_t *blob = hb_face_reference_blob (face);
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unsigned int blob_length;
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const char *blob_data = hb_blob_get_data (blob, &blob_length);
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if (unlikely (!blob_length))
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DEBUG_MSG (UNISCRIBE, face, "Face has empty blob");
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DWORD num_fonts_installed;
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data->fh = AddFontMemResourceEx ((void *) blob_data, blob_length, 0, &num_fonts_installed);
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hb_blob_destroy (blob);
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if (unlikely (!data->fh))
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DEBUG_MSG (UNISCRIBE, face, "Face AddFontMemResourceEx() failed");
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if (unlikely (!hb_face_set_user_data (face, &uniscribe_face_data_key, data,
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(hb_destroy_func_t) _hb_uniscribe_face_data_destroy)))
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{
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_hb_uniscribe_face_data_destroy (data);
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return &_hb_uniscribe_face_data_nil;
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}
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return data;
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}
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static struct hb_uniscribe_font_data_t {
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HDC hdc;
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HFONT hfont;
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SCRIPT_CACHE script_cache;
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} _hb_uniscribe_font_data_nil = {NULL, NULL, NULL};
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static hb_user_data_key_t uniscribe_font_data_key;
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static void
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_hb_uniscribe_font_data_destroy (hb_uniscribe_font_data_t *data)
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{
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if (data->hdc)
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ReleaseDC (NULL, data->hdc);
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if (data->hfont)
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DeleteObject (data->hfont);
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if (data->script_cache)
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ScriptFreeCache (&data->script_cache);
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free (data);
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}
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static hb_uniscribe_font_data_t *
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_hb_uniscribe_font_get_data (hb_font_t *font)
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{
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hb_uniscribe_font_data_t *data = (hb_uniscribe_font_data_t *) hb_font_get_user_data (font, &uniscribe_font_data_key);
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if (likely (data)) return data;
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data = (hb_uniscribe_font_data_t *) calloc (1, sizeof (hb_uniscribe_font_data_t));
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if (unlikely (!data))
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return &_hb_uniscribe_font_data_nil;
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data->hdc = GetDC (NULL);
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LOGFONTW log_font;
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if (unlikely (!populate_log_font (&log_font, data->hdc, font)))
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DEBUG_MSG (UNISCRIBE, font, "Font populate_log_font() failed");
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else {
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data->hfont = CreateFontIndirectW (&log_font);
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if (unlikely (!data->hfont))
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DEBUG_MSG (UNISCRIBE, font, "Font CreateFontIndirectW() failed");
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if (!SelectObject (data->hdc, data->hfont))
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DEBUG_MSG (UNISCRIBE, font, "Font SelectObject() failed");
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}
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if (unlikely (!hb_font_set_user_data (font, &uniscribe_font_data_key, data,
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(hb_destroy_func_t) _hb_uniscribe_font_data_destroy)))
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{
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_hb_uniscribe_font_data_destroy (data);
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return &_hb_uniscribe_font_data_nil;
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}
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return data;
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}
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hb_bool_t
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hb_uniscribe_shape (hb_font_t *font,
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hb_buffer_t *buffer,
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@ -100,11 +202,25 @@ hb_uniscribe_shape (hb_font_t *font,
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{
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buffer->guess_properties ();
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HRESULT hr;
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#define FAIL(...) \
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HB_STMT_START { \
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DEBUG_MSG (UNISCRIBE, NULL, __VA_ARGS__); \
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return FALSE; \
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} HB_STMT_END;
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hb_uniscribe_face_data_t *face_data = _hb_uniscribe_face_get_data (font->face);
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if (unlikely (!face_data))
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FAIL ("Couldn't get face data");
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hb_uniscribe_font_data_t *font_data = _hb_uniscribe_font_get_data (font);
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if (unlikely (!font_data))
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FAIL ("Couldn't get font font");
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if (unlikely (!buffer->len))
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return TRUE;
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HRESULT hr;
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retry:
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unsigned int scratch_size;
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@ -152,13 +268,6 @@ retry:
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ALLOCATE_ARRAY (uint32_t, vis_clusters, glyphs_size);
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#define FAIL(...) \
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HB_STMT_START { \
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DEBUG_MSG (UNISCRIBE, NULL, __VA_ARGS__); \
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return FALSE; \
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} HB_STMT_END;
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#define MAX_ITEMS 10
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SCRIPT_ITEM items[MAX_ITEMS + 1];
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@ -189,30 +298,6 @@ retry:
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/* XXX setup ranges */
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}
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hb_blob_t *blob = hb_face_reference_blob (font->face);
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unsigned int blob_length;
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const char *blob_data = hb_blob_get_data (blob, &blob_length);
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if (unlikely (!blob_length))
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FAIL ("Empty font blob");
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DWORD num_fonts_installed;
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HANDLE fh = AddFontMemResourceEx ((void *) blob_data, blob_length, 0, &num_fonts_installed);
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hb_blob_destroy (blob);
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if (unlikely (!fh))
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FAIL ("AddFontMemResourceEx() failed");
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/* FREE stuff, specially when taking fallback... */
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HDC hdc = GetDC (NULL); /* XXX The DC should be cached on the face I guess? */
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LOGFONTW log_font;
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if (unlikely (!populate_log_font (&log_font, hdc, font)))
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FAIL ("populate_log_font() failed");
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HFONT hfont = CreateFontIndirectW (&log_font);
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SelectObject (hdc, hfont);
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SCRIPT_CACHE script_cache = NULL;
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OPENTYPE_TAG language_tag = hb_ot_tag_from_language (buffer->props.language);
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unsigned int glyphs_offset = 0;
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@ -223,8 +308,8 @@ retry:
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unsigned int item_chars_len = items[i + 1].iCharPos - chars_offset;
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OPENTYPE_TAG script_tag = script_tags[i]; /* XXX buffer->props.script */
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hr = ScriptShapeOpenType (hdc,
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&script_cache,
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hr = ScriptShapeOpenType (font_data->hdc,
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&font_data->script_cache,
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&items[i].a,
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script_tag,
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language_tag,
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@ -255,8 +340,8 @@ retry:
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if (unlikely (FAILED (hr)))
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FAIL ("ScriptShapeOpenType() failed: 0x%08xL", hr);
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hr = ScriptPlaceOpenType (hdc,
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&script_cache,
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hr = ScriptPlaceOpenType (font_data->hdc,
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&font_data->script_cache,
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&items[i].a,
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script_tag,
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language_tag,
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@ -281,10 +366,6 @@ retry:
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}
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glyphs_len = glyphs_offset;
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ReleaseDC (NULL, hdc);
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DeleteObject (hfont);
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RemoveFontMemResourceEx (fh);
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/* Ok, we've got everything we need, now compose output buffer,
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* very, *very*, carefully! */
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