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freetype2
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Code Issues 4 Releases Wiki Activity

[smooth] Switch to dynamic memory allocation. 

This is a proof of concept for `malloc` overhead benchmarking.

* src/smooth/ftgrays.c (gray_TWorker): Store `memory`.
(gray_convert_glyph): Allocate memory dynamically and handle errors.
(gray_raster_render): Set memory.
This commit is contained in:
Alexei Podtelezhnikov 2023-10-09 22:34:11 -04:00
parent 322e580bd0
commit 3cb3acf2f8
1 changed files with 16 additions and 5 deletions
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21
src/smooth/ftgrays.c
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@ -490,6 +490,7 @@ typedef ptrdiff_t FT_PtrDist;
typedef struct gray_TWorker_
{
ft_jmp_buf jump_buffer;
FT_Memory memory;
TCoord min_ex, max_ex; /* min and max integer pixel coordinates */
TCoord min_ey, max_ey;
@ -1958,7 +1959,10 @@ typedef ptrdiff_t FT_PtrDist;
const TCoord yMin = ras.min_ey;
const TCoord yMax = ras.max_ey;
TCell buffer[FT_MAX_GRAY_POOL];
FT_Error error = FT_THROW( Ok );
FT_Memory memory = ras.memory;
TCell* buffer;
size_t height = (size_t)( yMax - yMin );
size_t n = FT_MAX_GRAY_POOL / 8;
TCoord y;
@ -1968,6 +1972,9 @@ typedef ptrdiff_t FT_PtrDist;
int continued = 0;
if ( FT_QNEW_ARRAY( buffer, FT_MAX_GRAY_POOL ) )
return error;
/* Initialize the null cell at the end of the poll. */
ras.cell_null = buffer + FT_MAX_GRAY_POOL - 1;
ras.cell_null->x = CELL_MAX_X_VALUE;
@ -1999,7 +2006,6 @@ typedef ptrdiff_t FT_PtrDist;
{
TCoord width = band[0] - band[1];
TCoord w;
int error;
for ( w = 0; w < width; ++w )
@ -2028,7 +2034,7 @@ typedef ptrdiff_t FT_PtrDist;
continue;
}
else if ( error != Smooth_Err_Raster_Overflow )
return error;
goto Exit;
/* render pool overflow; we will reduce the render band by half */
width >>= 1;
@ -2037,7 +2043,8 @@ typedef ptrdiff_t FT_PtrDist;
if ( width == 0 )
{
FT_TRACE7(( "gray_convert_glyph: rotten glyph\n" ));
return FT_THROW( Raster_Overflow );
error = FT_THROW( Raster_Overflow );
goto Exit;
}
band++;
@ -2046,7 +2053,9 @@ typedef ptrdiff_t FT_PtrDist;
} while ( band >= bands );
}
return Smooth_Err_Ok;
Exit:
FT_FREE( buffer );
return error;
}
@ -2132,6 +2141,8 @@ typedef ptrdiff_t FT_PtrDist;
if ( ras.max_ex <= ras.min_ex || ras.max_ey <= ras.min_ey )
return Smooth_Err_Ok;
ras.memory = (FT_Memory)((gray_PRaster)raster)->memory;
return gray_convert_glyph( RAS_VAR );
}