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freetype2
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Code Issues 4 Releases Wiki Activity

[base] Discard and recreate bitmaps for copying and converting. 

Reusing target bitmaps for copying and converting is permitted.  It is,
however, pointless to preserve their content before overwriting.  Free-
malloc might be faster than realloc.

* src/base/ftbitmap.c (FT_Bitmap_Copy, FT_Bitmap_Convert): Free
an old buffer and create a new one.
This commit is contained in:
Alexei Podtelezhnikov 2022-09-22 15:09:17 +00:00
parent 33ceac2afc
commit c456eeb47a
1 changed files with 19 additions and 51 deletions
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70
src/base/ftbitmap.c
View File

@ -66,9 +66,7 @@
{
FT_Memory memory;
FT_Error error = FT_Err_Ok;
FT_Int pitch;
FT_ULong size;
FT_Int pitch;
FT_Int source_pitch_sign, target_pitch_sign;
@ -85,49 +83,28 @@
source_pitch_sign = source->pitch < 0 ? -1 : 1;
target_pitch_sign = target->pitch < 0 ? -1 : 1;
if ( !source->buffer )
{
*target = *source;
if ( source_pitch_sign != target_pitch_sign )
target->pitch = -target->pitch;
return FT_Err_Ok;
}
memory = library->memory;
pitch = source->pitch;
FT_FREE( target->buffer );
*target = *source;
if ( source_pitch_sign != target_pitch_sign )
target->pitch = -target->pitch;
if ( !source->buffer )
return FT_Err_Ok;
pitch = source->pitch;
if ( pitch < 0 )
pitch = -pitch;
size = (FT_ULong)pitch * source->rows;
if ( target->buffer )
{
FT_Int target_pitch = target->pitch;
FT_ULong target_size;
if ( target_pitch < 0 )
target_pitch = -target_pitch;
target_size = (FT_ULong)target_pitch * target->rows;
if ( target_size != size )
FT_MEM_QREALLOC( target->buffer, target_size, size );
}
else
FT_MEM_QALLOC( target->buffer, size );
FT_MEM_QALLOC_MULT( target->buffer, target->rows, pitch );
if ( !error )
{
unsigned char *p;
p = target->buffer;
*target = *source;
target->buffer = p;
if ( source_pitch_sign == target_pitch_sign )
FT_MEM_COPY( target->buffer, source->buffer, size );
FT_MEM_COPY( target->buffer, source->buffer,
(FT_Long)source->rows * pitch );
else
{
/* take care of bitmap flow */
@ -542,15 +519,11 @@
case FT_PIXEL_MODE_LCD_V:
case FT_PIXEL_MODE_BGRA:
{
FT_Int pad, old_target_pitch, target_pitch;
FT_ULong old_size;
FT_Int pad, target_pitch;
FT_Int old_target_pitch = target->pitch;
old_target_pitch = target->pitch;
if ( old_target_pitch < 0 )
old_target_pitch = -old_target_pitch;
old_size = target->rows * (FT_UInt)old_target_pitch;
FT_Bitmap_Done( library, target );
target->pixel_mode = FT_PIXEL_MODE_GRAY;
target->rows = source->rows;
@ -566,15 +539,10 @@
target_pitch = (FT_Int)source->width + pad;
if ( target_pitch > 0 &&
(FT_ULong)target->rows > FT_ULONG_MAX / (FT_ULong)target_pitch )
return FT_THROW( Invalid_Argument );
if ( FT_QREALLOC( target->buffer,
old_size, target->rows * (FT_UInt)target_pitch ) )
if ( FT_QALLOC_MULT( target->buffer, target->rows, target_pitch ) )
return error;
target->pitch = target->pitch < 0 ? -target_pitch : target_pitch;
target->pitch = old_target_pitch < 0 ? -target_pitch : target_pitch;
}
break;