[ftfuzzer] Improve coverage of rasterfuzzer.
* src/tools/ftfuzzer/rasterfuzzer.cc (LLVMFuzzerTestOneInput): Use input data for `tags' array also. Trim input data to get more positive hits.
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@ -1,3 +1,11 @@
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2016-03-12 Werner Lemberg <wl@gnu.org>
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[ftfuzzer] Improve coverage of rasterfuzzer.
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* src/tools/ftfuzzer/rasterfuzzer.cc (LLVMFuzzerTestOneInput): Use
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input data for `tags' array also.
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Trim input data to get more positive hits.
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2016-03-11 Pavlo Denysov <paul.kiev+savannah@gmail.com>
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Fix CMake issues for iOS (patch #8941).
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@ -71,27 +71,52 @@
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NULL // palette
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};
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short n_points = short( size_ / sizeof ( FT_Vector ) );
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const size_t vsize = sizeof ( FT_Vector );
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const size_t tsize = sizeof ( char );
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// we use the input data for both points and tags
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short n_points = short( size_ / ( vsize + tsize ) );
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if ( n_points <= 2 )
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return 0;
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FT_Vector* points = reinterpret_cast<FT_Vector*>(
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const_cast<uint8_t*>( data ) );
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const_cast<uint8_t*>(
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data ) );
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char* tags = reinterpret_cast<char*>(
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const_cast<uint8_t*>(
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data + size_t( n_points ) * vsize ) );
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// to reduce the number of invalid outlines that are immediately
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// rejected in `FT_Outline_Render', limit values to 2^18 pixels
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// (i.e., 2^24 bits)
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for ( short i = 0; i < n_points; i++ )
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{
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if ( points[i].x == LONG_MIN )
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points[i].x = 0;
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else if ( points[i].x < 0 )
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points[i].x = -( -points[i].x & 0xFFFFFF ) - 1;
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else
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points[i].x = ( points[i].x & 0xFFFFFF ) + 1;
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if ( points[i].y == LONG_MIN )
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points[i].y = 0;
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else if ( points[i].y < 0 )
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points[i].y = -( -points[i].y & 0xFFFFFF ) - 1;
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else
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points[i].y = ( points[i].y & 0xFFFFFF ) + 1;
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}
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short contours[1];
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contours[0] = n_points - 1;
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vector<char> tags( (size_t)n_points );
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fill( tags.begin(), tags.end(), 1 );
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FT_Outline outline =
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{
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1, // n_contours
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n_points, // n_points
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points, // points
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reinterpret_cast<char*>( tags.data() ), // tags
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contours, // contours
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FT_OUTLINE_NONE // flags
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1, // n_contours
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n_points, // n_points
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points, // points
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tags, // tags
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contours, // contours
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FT_OUTLINE_NONE // flags
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};
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FT_Outline_Get_Bitmap( library, &outline, &bitmap_mono );
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