diff options
Diffstat (limited to 'src/sfnt/ttsbit0.c')
| -rw-r--r-- | src/sfnt/ttsbit0.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/src/sfnt/ttsbit0.c b/src/sfnt/ttsbit0.c index 38bcf210e..99c14267a 100644 --- a/src/sfnt/ttsbit0.c +++ b/src/sfnt/ttsbit0.c @@ -375,7 +375,7 @@ { FT_Error error = SFNT_Err_Ok; FT_Byte* line; - FT_Int bit_height, bit_width, pitch, width, height, h; + FT_Int bit_height, bit_width, pitch, width, height, line_bits, h; FT_Bitmap* bitmap; @@ -396,6 +396,8 @@ width = decoder->metrics->width; height = decoder->metrics->height; + line_bits = width * decoder->bit_depth; + if ( x_pos < 0 || x_pos + width > bit_width || y_pos < 0 || y_pos + height > bit_height ) { @@ -403,7 +405,7 @@ goto Exit; } - if ( p + ( ( width + 7 ) >> 3 ) * height > limit ) + if ( p + ( ( line_bits + 7 ) >> 3 ) * height > limit ) { error = SFNT_Err_Invalid_File_Format; goto Exit; @@ -421,7 +423,7 @@ FT_Int w; - for ( w = width; w >= 8; w -= 8 ) + for ( w = line_bits; w >= 8; w -= 8 ) { write[0] = (FT_Byte)( write[0] | *p++ ); write += 1; @@ -440,7 +442,7 @@ FT_UInt wval = 0; - for ( w = width; w >= 8; w -= 8 ) + for ( w = line_bits; w >= 8; w -= 8 ) { wval = (FT_UInt)( wval | *p++ ); write[0] = (FT_Byte)( write[0] | ( wval >> x_pos ) ); @@ -513,7 +515,7 @@ { FT_Error error = SFNT_Err_Ok; FT_Byte* line; - FT_Int bit_height, bit_width, pitch, width, height, h, nbits; + FT_Int bit_height, bit_width, pitch, width, height, line_bits, h, nbits; FT_Bitmap* bitmap; FT_UShort rval; @@ -535,6 +537,8 @@ width = decoder->metrics->width; height = decoder->metrics->height; + line_bits = width * decoder->bit_depth; + if ( x_pos < 0 || x_pos + width > bit_width || y_pos < 0 || y_pos + height > bit_height ) { @@ -542,7 +546,7 @@ goto Exit; } - if ( p + ( ( width * height + 7 ) >> 3 ) > limit ) + if ( p + ( ( line_bits * height + 7 ) >> 3 ) > limit ) { error = SFNT_Err_Invalid_File_Format; goto Exit; @@ -561,13 +565,13 @@ for ( h = height; h > 0; h--, line += pitch ) { FT_Byte* write = line; - FT_Int w = width; + FT_Int w = line_bits; /* handle initial byte (in target bitmap) specially if necessary */ if ( x_pos ) { - w = ( width < 8 - x_pos ) ? width : 8 - x_pos; + w = ( line_bits < 8 - x_pos ) ? line_bits : 8 - x_pos; if ( h == height ) { @@ -590,7 +594,7 @@ ( ~( 0xFF << w ) << ( 8 - w - x_pos ) ); rval <<= 8; - w = width - w; + w = line_bits - w; } /* handle medial bytes */ |