OTS: Add DoNotDropColorBitmapTables() API.

trunk/src/ots.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ots.h"
 
 #include <sys/types.h>
 #include <zlib.h>
 
 #include <algorithm>
@@ skipping 125 matching lines @@
   { "GPOS", ots::ots_gpos_parse, ots::ots_gpos_serialise,
     ots::ots_gpos_should_serialise, ots::ots_gpos_free, false },
   { "GSUB", ots::ots_gsub_parse, ots::ots_gsub_serialise,
     ots::ots_gsub_should_serialise, ots::ots_gsub_free, false },
   { "vhea", ots::ots_vhea_parse, ots::ots_vhea_serialise,
     ots::ots_vhea_should_serialise, ots::ots_vhea_free, false },
   { "vmtx", ots::ots_vmtx_parse, ots::ots_vmtx_serialise,
     ots::ots_vmtx_should_serialise, ots::ots_vmtx_free, false },
   { "MATH", ots::ots_math_parse, ots::ots_math_serialise,
     ots::ots_math_should_serialise, ots::ots_math_free, false },
+  { "CBDT", ots::ots_cbdt_parse, ots::ots_cbdt_serialise,
+    ots::ots_cbdt_should_serialise, ots::ots_cbdt_free, false },
+  { "CBLC", ots::ots_cblc_parse, ots::ots_cblc_serialise,
+    ots::ots_cblc_should_serialise, ots::ots_cblc_free, false },
   // TODO(bashi): Support mort, base, and jstf tables.
   { 0, NULL, NULL, NULL, NULL, false },
 };
 
 bool ProcessGeneric(ots::OpenTypeFile *header,
                     uint32_t signature,
                     ots::OTSStream *output,
                     const uint8_t *data, size_t length,
                     const std::vector<OpenTypeTable>& tables,
                     ots::Buffer& file);
@@ skipping 394 matching lines @@
   if (header->cff) {
     // font with PostScript glyph
     if (header->version != Tag("OTTO")) {
       return OTS_FAILURE();
     }
     if (header->glyf || header->loca) {
       // mixing outline formats is not recommended
       return OTS_FAILURE();
     }
   } else {
-    if (!header->glyf || !header->loca) {
-      // No TrueType glyph found.
-      // Note: bitmap-only fonts are not supported.
+    if ((!header->glyf || !header->loca) && (!header->cbdt || !header->cblc)) {
+      // No TrueType glyph or color bitmap found.
       return OTS_FAILURE();
     }
   }
 
   unsigned num_output_tables = 0;
   for (unsigned i = 0; ; ++i) {
     if (table_parsers[i].parse == NULL) {
       break;
     }
 
@@ skipping 105 matching lines @@
     return OTS_FAILURE();
   }
 
   return true;
 }
 
 }  // namespace
 
 namespace ots {
 
+bool g_drop_color_bitmap_tables = true;
+
 bool IsValidVersionTag(uint32_t tag) {
   return tag == Tag("\x00\x01\x00\x00") ||
          // OpenType fonts with CFF data have 'OTTO' tag.
          tag == Tag("OTTO") ||
          // Older Mac fonts might have 'true' or 'typ1' tag.
          tag == Tag("true") ||
          tag == Tag("typ1");
 }
 
 void DisableDebugOutput() {
   g_debug_output = false;
 }
 
 void EnableWOFF2() {
   g_enable_woff2 = true;
 }
 
+void DoNotDropColorBitmapTables() {
+  g_drop_color_bitmap_tables = false;
+}
+
 bool Process(OTSStream *output, const uint8_t *data, size_t length) {
   OpenTypeFile header;
   if (length < 4) {
     return OTS_FAILURE();
   }
 
   bool result;
   if (data[0] == 'w' && data[1] == 'O' && data[2] == 'F' && data[3] == 'F') {
     result = ProcessWOFF(&header, output, data, length);
   } else if (g_enable_woff2 &&
@@ skipping 27 matching lines @@
     va_start(va, format);
     std::vfprintf(stderr, format, va);
     va_end(va);
     std::fprintf(stderr, "\n");
     std::fflush(stderr);
   }
 }
 #endif
 
 }  // namespace ots