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* src/base/ftbitmap.c (FT_Bitmap_Copy): Improve. 

This commit adds argument checks and support for different flow
directions.
This commit is contained in:
Werner Lemberg 2014-11-21 06:05:49 +01:00
parent 1e6e1b8390
commit 6de761744c
2 changed files with 48 additions and 5 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2014-11-21 Werner Lemberg <wl@gnu.org>
* src/base/ftbitmap.c (FT_Bitmap_Copy): Improve.
This commit adds argument checks and support for different flow
directions.
2014-11-20 Werner Lemberg <wl@gnu.org>
* src/base/ftbitmap.c (FT_Bitmap_New): Check argument.

46
src/base/ftbitmap.c
View File

@ -45,22 +45,39 @@
const FT_Bitmap *source,
FT_Bitmap *target)
{
FT_Memory memory = library->memory;
FT_Memory memory;
FT_Error error = FT_Err_Ok;
FT_Int pitch = source->pitch;
FT_ULong size;
FT_Int pitch;
FT_ULong size;
FT_Int source_pitch_sign, target_pitch_sign;
if ( !library )
return FT_THROW( Invalid_Library_Handle );
if ( !source || !target )
return FT_THROW( Invalid_Argument );
if ( source == target )
return FT_Err_Ok;
source_pitch_sign = source->pitch < 0 ? -1 : 1;
target_pitch_sign = target->pitch < 0 ? -1 : 1;
if ( source->buffer == NULL )
{
*target = *source;
if ( source_pitch_sign != target_pitch_sign )
target->pitch = -target->pitch;
return FT_Err_Ok;
}
memory = library->memory;
pitch = source->pitch;
if ( pitch < 0 )
pitch = -pitch;
size = (FT_ULong)pitch * source->rows;
@ -71,7 +88,7 @@
FT_ULong target_size;
if ( target_pitch < 0 )
if ( target_pitch < 0 )
target_pitch = -target_pitch;
target_size = (FT_ULong)target_pitch * target->rows;
@ -90,7 +107,26 @@
*target = *source;
target->buffer = p;
FT_MEM_COPY( target->buffer, source->buffer, size );
if ( source_pitch_sign == target_pitch_sign )
FT_MEM_COPY( target->buffer, source->buffer, size );
else
{
/* take care of bitmap flow */
FT_UInt i;
FT_Byte* s = source->buffer;
FT_Byte* t = target->buffer;
t += pitch * ( target->rows - 1 );
for ( i = target->rows; i > 0; i-- )
{
FT_ARRAY_COPY( t, s, pitch );
s += pitch;
t -= pitch;
}
}
}
return error;