| Index: third_party/freetype2/src/src/base/ftbitmap.c
|
| diff --git a/third_party/freetype2/src/src/base/ftbitmap.c b/third_party/freetype2/src/src/base/ftbitmap.c
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..a54572aaa2aefde360d5ef6c938992a52a27e130
|
| --- /dev/null
|
| +++ b/third_party/freetype2/src/src/base/ftbitmap.c
|
| @@ -0,0 +1,809 @@
|
| +/***************************************************************************/
|
| +/* */
|
| +/* ftbitmap.c */
|
| +/* */
|
| +/* FreeType utility functions for bitmaps (body). */
|
| +/* */
|
| +/* Copyright 2004-2015 by */
|
| +/* David Turner, Robert Wilhelm, and Werner Lemberg. */
|
| +/* */
|
| +/* This file is part of the FreeType project, and may only be used, */
|
| +/* modified, and distributed under the terms of the FreeType project */
|
| +/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
|
| +/* this file you indicate that you have read the license and */
|
| +/* understand and accept it fully. */
|
| +/* */
|
| +/***************************************************************************/
|
| +
|
| +
|
| +#include <ft2build.h>
|
| +#include FT_INTERNAL_DEBUG_H
|
| +
|
| +#include FT_BITMAP_H
|
| +#include FT_IMAGE_H
|
| +#include FT_INTERNAL_OBJECTS_H
|
| +
|
| +
|
| + static
|
| + const FT_Bitmap null_bitmap = { 0, 0, 0, 0, 0, 0, 0, 0 };
|
| +
|
| +
|
| + /* documentation is in ftbitmap.h */
|
| +
|
| + FT_EXPORT_DEF( void )
|
| + FT_Bitmap_Init( FT_Bitmap *abitmap )
|
| + {
|
| + if ( abitmap )
|
| + *abitmap = null_bitmap;
|
| + }
|
| +
|
| +
|
| + /* deprecated function name; retained for ABI compatibility */
|
| +
|
| + FT_EXPORT_DEF( void )
|
| + FT_Bitmap_New( FT_Bitmap *abitmap )
|
| + {
|
| + if ( abitmap )
|
| + *abitmap = null_bitmap;
|
| + }
|
| +
|
| +
|
| + /* documentation is in ftbitmap.h */
|
| +
|
| + FT_EXPORT_DEF( FT_Error )
|
| + FT_Bitmap_Copy( FT_Library library,
|
| + const FT_Bitmap *source,
|
| + FT_Bitmap *target)
|
| + {
|
| + FT_Memory memory;
|
| + FT_Error error = FT_Err_Ok;
|
| +
|
| + 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;
|
| +
|
| + 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 )
|
| + (void)FT_QREALLOC( target->buffer, target_size, size );
|
| + }
|
| + else
|
| + (void)FT_QALLOC( target->buffer, size );
|
| +
|
| + 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 );
|
| + else
|
| + {
|
| + /* take care of bitmap flow */
|
| + FT_UInt i;
|
| + FT_Byte* s = source->buffer;
|
| + FT_Byte* t = target->buffer;
|
| +
|
| +
|
| + t += (FT_ULong)pitch * ( target->rows - 1 );
|
| +
|
| + for ( i = target->rows; i > 0; i-- )
|
| + {
|
| + FT_ARRAY_COPY( t, s, pitch );
|
| +
|
| + s += pitch;
|
| + t -= pitch;
|
| + }
|
| + }
|
| + }
|
| +
|
| + return error;
|
| + }
|
| +
|
| +
|
| + /* Enlarge `bitmap' horizontally and vertically by `xpixels' */
|
| + /* and `ypixels', respectively. */
|
| +
|
| + static FT_Error
|
| + ft_bitmap_assure_buffer( FT_Memory memory,
|
| + FT_Bitmap* bitmap,
|
| + FT_UInt xpixels,
|
| + FT_UInt ypixels )
|
| + {
|
| + FT_Error error;
|
| + int pitch;
|
| + int new_pitch;
|
| + FT_UInt bpp;
|
| + FT_UInt i, width, height;
|
| + unsigned char* buffer = NULL;
|
| +
|
| +
|
| + width = bitmap->width;
|
| + height = bitmap->rows;
|
| + pitch = bitmap->pitch;
|
| + if ( pitch < 0 )
|
| + pitch = -pitch;
|
| +
|
| + switch ( bitmap->pixel_mode )
|
| + {
|
| + case FT_PIXEL_MODE_MONO:
|
| + bpp = 1;
|
| + new_pitch = (int)( ( width + xpixels + 7 ) >> 3 );
|
| + break;
|
| + case FT_PIXEL_MODE_GRAY2:
|
| + bpp = 2;
|
| + new_pitch = (int)( ( width + xpixels + 3 ) >> 2 );
|
| + break;
|
| + case FT_PIXEL_MODE_GRAY4:
|
| + bpp = 4;
|
| + new_pitch = (int)( ( width + xpixels + 1 ) >> 1 );
|
| + break;
|
| + case FT_PIXEL_MODE_GRAY:
|
| + case FT_PIXEL_MODE_LCD:
|
| + case FT_PIXEL_MODE_LCD_V:
|
| + bpp = 8;
|
| + new_pitch = (int)( width + xpixels );
|
| + break;
|
| + default:
|
| + return FT_THROW( Invalid_Glyph_Format );
|
| + }
|
| +
|
| + /* if no need to allocate memory */
|
| + if ( ypixels == 0 && new_pitch <= pitch )
|
| + {
|
| + /* zero the padding */
|
| + FT_UInt bit_width = (FT_UInt)pitch * 8;
|
| + FT_UInt bit_last = ( width + xpixels ) * bpp;
|
| +
|
| +
|
| + if ( bit_last < bit_width )
|
| + {
|
| + FT_Byte* line = bitmap->buffer + ( bit_last >> 3 );
|
| + FT_Byte* end = bitmap->buffer + pitch;
|
| + FT_UInt shift = bit_last & 7;
|
| + FT_UInt mask = 0xFF00U >> shift;
|
| + FT_UInt count = height;
|
| +
|
| +
|
| + for ( ; count > 0; count--, line += pitch, end += pitch )
|
| + {
|
| + FT_Byte* write = line;
|
| +
|
| +
|
| + if ( shift > 0 )
|
| + {
|
| + write[0] = (FT_Byte)( write[0] & mask );
|
| + write++;
|
| + }
|
| + if ( write < end )
|
| + FT_MEM_ZERO( write, end - write );
|
| + }
|
| + }
|
| +
|
| + return FT_Err_Ok;
|
| + }
|
| +
|
| + /* otherwise allocate new buffer */
|
| + if ( FT_QALLOC_MULT( buffer, new_pitch, bitmap->rows + ypixels ) )
|
| + return error;
|
| +
|
| + /* new rows get added at the top of the bitmap, */
|
| + /* thus take care of the flow direction */
|
| + if ( bitmap->pitch > 0 )
|
| + {
|
| + FT_UInt len = ( width * bpp + 7 ) >> 3;
|
| +
|
| +
|
| + for ( i = 0; i < bitmap->rows; i++ )
|
| + FT_MEM_COPY( buffer + (FT_UInt)new_pitch * ( ypixels + i ),
|
| + bitmap->buffer + (FT_UInt)pitch * i,
|
| + len );
|
| + }
|
| + else
|
| + {
|
| + FT_UInt len = ( width * bpp + 7 ) >> 3;
|
| +
|
| +
|
| + for ( i = 0; i < bitmap->rows; i++ )
|
| + FT_MEM_COPY( buffer + (FT_UInt)new_pitch * i,
|
| + bitmap->buffer + (FT_UInt)pitch * i,
|
| + len );
|
| + }
|
| +
|
| + FT_FREE( bitmap->buffer );
|
| + bitmap->buffer = buffer;
|
| +
|
| + if ( bitmap->pitch < 0 )
|
| + new_pitch = -new_pitch;
|
| +
|
| + /* set pitch only, width and height are left untouched */
|
| + bitmap->pitch = new_pitch;
|
| +
|
| + return FT_Err_Ok;
|
| + }
|
| +
|
| +
|
| + /* documentation is in ftbitmap.h */
|
| +
|
| + FT_EXPORT_DEF( FT_Error )
|
| + FT_Bitmap_Embolden( FT_Library library,
|
| + FT_Bitmap* bitmap,
|
| + FT_Pos xStrength,
|
| + FT_Pos yStrength )
|
| + {
|
| + FT_Error error;
|
| + unsigned char* p;
|
| + FT_Int i, x, pitch;
|
| + FT_UInt y;
|
| + FT_Int xstr, ystr;
|
| +
|
| +
|
| + if ( !library )
|
| + return FT_THROW( Invalid_Library_Handle );
|
| +
|
| + if ( !bitmap || !bitmap->buffer )
|
| + return FT_THROW( Invalid_Argument );
|
| +
|
| + if ( ( ( FT_PIX_ROUND( xStrength ) >> 6 ) > FT_INT_MAX ) ||
|
| + ( ( FT_PIX_ROUND( yStrength ) >> 6 ) > FT_INT_MAX ) )
|
| + return FT_THROW( Invalid_Argument );
|
| +
|
| + xstr = (FT_Int)FT_PIX_ROUND( xStrength ) >> 6;
|
| + ystr = (FT_Int)FT_PIX_ROUND( yStrength ) >> 6;
|
| +
|
| + if ( xstr == 0 && ystr == 0 )
|
| + return FT_Err_Ok;
|
| + else if ( xstr < 0 || ystr < 0 )
|
| + return FT_THROW( Invalid_Argument );
|
| +
|
| + switch ( bitmap->pixel_mode )
|
| + {
|
| + case FT_PIXEL_MODE_GRAY2:
|
| + case FT_PIXEL_MODE_GRAY4:
|
| + {
|
| + FT_Bitmap tmp;
|
| +
|
| +
|
| + /* convert to 8bpp */
|
| + FT_Bitmap_Init( &tmp );
|
| + error = FT_Bitmap_Convert( library, bitmap, &tmp, 1 );
|
| + if ( error )
|
| + return error;
|
| +
|
| + FT_Bitmap_Done( library, bitmap );
|
| + *bitmap = tmp;
|
| + }
|
| + break;
|
| +
|
| + case FT_PIXEL_MODE_MONO:
|
| + if ( xstr > 8 )
|
| + xstr = 8;
|
| + break;
|
| +
|
| + case FT_PIXEL_MODE_LCD:
|
| + xstr *= 3;
|
| + break;
|
| +
|
| + case FT_PIXEL_MODE_LCD_V:
|
| + ystr *= 3;
|
| + break;
|
| +
|
| + case FT_PIXEL_MODE_BGRA:
|
| + /* We don't embolden color glyphs. */
|
| + return FT_Err_Ok;
|
| + }
|
| +
|
| + error = ft_bitmap_assure_buffer( library->memory, bitmap,
|
| + (FT_UInt)xstr, (FT_UInt)ystr );
|
| + if ( error )
|
| + return error;
|
| +
|
| + /* take care of bitmap flow */
|
| + pitch = bitmap->pitch;
|
| + if ( pitch > 0 )
|
| + p = bitmap->buffer + pitch * ystr;
|
| + else
|
| + {
|
| + pitch = -pitch;
|
| + p = bitmap->buffer + (FT_UInt)pitch * ( bitmap->rows - 1 );
|
| + }
|
| +
|
| + /* for each row */
|
| + for ( y = 0; y < bitmap->rows ; y++ )
|
| + {
|
| + /*
|
| + * Horizontally:
|
| + *
|
| + * From the last pixel on, make each pixel or'ed with the
|
| + * `xstr' pixels before it.
|
| + */
|
| + for ( x = pitch - 1; x >= 0; x-- )
|
| + {
|
| + unsigned char tmp;
|
| +
|
| +
|
| + tmp = p[x];
|
| + for ( i = 1; i <= xstr; i++ )
|
| + {
|
| + if ( bitmap->pixel_mode == FT_PIXEL_MODE_MONO )
|
| + {
|
| + p[x] |= tmp >> i;
|
| +
|
| + /* the maximum value of 8 for `xstr' comes from here */
|
| + if ( x > 0 )
|
| + p[x] |= p[x - 1] << ( 8 - i );
|
| +
|
| +#if 0
|
| + if ( p[x] == 0xFF )
|
| + break;
|
| +#endif
|
| + }
|
| + else
|
| + {
|
| + if ( x - i >= 0 )
|
| + {
|
| + if ( p[x] + p[x - i] > bitmap->num_grays - 1 )
|
| + {
|
| + p[x] = (unsigned char)( bitmap->num_grays - 1 );
|
| + break;
|
| + }
|
| + else
|
| + {
|
| + p[x] = (unsigned char)( p[x] + p[x - i] );
|
| + if ( p[x] == bitmap->num_grays - 1 )
|
| + break;
|
| + }
|
| + }
|
| + else
|
| + break;
|
| + }
|
| + }
|
| + }
|
| +
|
| + /*
|
| + * Vertically:
|
| + *
|
| + * Make the above `ystr' rows or'ed with it.
|
| + */
|
| + for ( x = 1; x <= ystr; x++ )
|
| + {
|
| + unsigned char* q;
|
| +
|
| +
|
| + q = p - bitmap->pitch * x;
|
| + for ( i = 0; i < pitch; i++ )
|
| + q[i] |= p[i];
|
| + }
|
| +
|
| + p += bitmap->pitch;
|
| + }
|
| +
|
| + bitmap->width += (FT_UInt)xstr;
|
| + bitmap->rows += (FT_UInt)ystr;
|
| +
|
| + return FT_Err_Ok;
|
| + }
|
| +
|
| +
|
| + static FT_Byte
|
| + ft_gray_for_premultiplied_srgb_bgra( const FT_Byte* bgra )
|
| + {
|
| + FT_UInt a = bgra[3];
|
| + FT_UInt l;
|
| +
|
| +
|
| + /* Short-circuit transparent color to avoid division by zero. */
|
| + if ( !a )
|
| + return 0;
|
| +
|
| + /*
|
| + * Luminosity for sRGB is defined using ~0.2126,0.7152,0.0722
|
| + * coefficients for RGB channels *on the linear colors*.
|
| + * A gamma of 2.2 is fair to assume. And then, we need to
|
| + * undo the premultiplication too.
|
| + *
|
| + * http://accessibility.kde.org/hsl-adjusted.php
|
| + *
|
| + * We do the computation with integers only, applying a gamma of 2.0.
|
| + * We guarantee 32-bit arithmetic to avoid overflow but the resulting
|
| + * luminosity fits into 16 bits.
|
| + *
|
| + */
|
| +
|
| + l = ( 4732UL /* 0.0722 * 65536 */ * bgra[0] * bgra[0] +
|
| + 46871UL /* 0.7152 * 65536 */ * bgra[1] * bgra[1] +
|
| + 13933UL /* 0.2126 * 65536 */ * bgra[2] * bgra[2] ) >> 16;
|
| +
|
| + /*
|
| + * Final transparency can be determined as follows.
|
| + *
|
| + * - If alpha is zero, we want 0.
|
| + * - If alpha is zero and luminosity is zero, we want 255.
|
| + * - If alpha is zero and luminosity is one, we want 0.
|
| + *
|
| + * So the formula is a * (1 - l) = a - l * a.
|
| + *
|
| + * We still need to undo premultiplication by dividing l by a*a.
|
| + *
|
| + */
|
| +
|
| + return (FT_Byte)( a - l / a );
|
| + }
|
| +
|
| +
|
| + /* documentation is in ftbitmap.h */
|
| +
|
| + FT_EXPORT_DEF( FT_Error )
|
| + FT_Bitmap_Convert( FT_Library library,
|
| + const FT_Bitmap *source,
|
| + FT_Bitmap *target,
|
| + FT_Int alignment )
|
| + {
|
| + FT_Error error = FT_Err_Ok;
|
| + FT_Memory memory;
|
| +
|
| + FT_Byte* s;
|
| + FT_Byte* t;
|
| +
|
| +
|
| + if ( !library )
|
| + return FT_THROW( Invalid_Library_Handle );
|
| +
|
| + if ( !source || !target )
|
| + return FT_THROW( Invalid_Argument );
|
| +
|
| + memory = library->memory;
|
| +
|
| + switch ( source->pixel_mode )
|
| + {
|
| + case FT_PIXEL_MODE_MONO:
|
| + case FT_PIXEL_MODE_GRAY:
|
| + case FT_PIXEL_MODE_GRAY2:
|
| + case FT_PIXEL_MODE_GRAY4:
|
| + case FT_PIXEL_MODE_LCD:
|
| + case FT_PIXEL_MODE_LCD_V:
|
| + case FT_PIXEL_MODE_BGRA:
|
| + {
|
| + FT_Int pad, old_target_pitch, target_pitch;
|
| + FT_ULong old_size;
|
| +
|
| +
|
| + 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;
|
| +
|
| + target->pixel_mode = FT_PIXEL_MODE_GRAY;
|
| + target->rows = source->rows;
|
| + target->width = source->width;
|
| +
|
| + pad = 0;
|
| + if ( alignment > 0 )
|
| + {
|
| + pad = (FT_Int)source->width % alignment;
|
| + if ( pad != 0 )
|
| + pad = alignment - pad;
|
| + }
|
| +
|
| + 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 ( target->rows * (FT_ULong)target_pitch > old_size &&
|
| + FT_QREALLOC( target->buffer,
|
| + old_size, target->rows * (FT_UInt)target_pitch ) )
|
| + return error;
|
| +
|
| + target->pitch = target->pitch < 0 ? -target_pitch : target_pitch;
|
| + }
|
| + break;
|
| +
|
| + default:
|
| + error = FT_THROW( Invalid_Argument );
|
| + }
|
| +
|
| + s = source->buffer;
|
| + t = target->buffer;
|
| +
|
| + /* take care of bitmap flow */
|
| + if ( source->pitch < 0 )
|
| + s -= source->pitch * (FT_Int)( source->rows - 1 );
|
| + if ( target->pitch < 0 )
|
| + t -= target->pitch * (FT_Int)( target->rows - 1 );
|
| +
|
| + switch ( source->pixel_mode )
|
| + {
|
| + case FT_PIXEL_MODE_MONO:
|
| + {
|
| + FT_UInt i;
|
| +
|
| +
|
| + target->num_grays = 2;
|
| +
|
| + for ( i = source->rows; i > 0; i-- )
|
| + {
|
| + FT_Byte* ss = s;
|
| + FT_Byte* tt = t;
|
| + FT_UInt j;
|
| +
|
| +
|
| + /* get the full bytes */
|
| + for ( j = source->width >> 3; j > 0; j-- )
|
| + {
|
| + FT_Int val = ss[0]; /* avoid a byte->int cast on each line */
|
| +
|
| +
|
| + tt[0] = (FT_Byte)( ( val & 0x80 ) >> 7 );
|
| + tt[1] = (FT_Byte)( ( val & 0x40 ) >> 6 );
|
| + tt[2] = (FT_Byte)( ( val & 0x20 ) >> 5 );
|
| + tt[3] = (FT_Byte)( ( val & 0x10 ) >> 4 );
|
| + tt[4] = (FT_Byte)( ( val & 0x08 ) >> 3 );
|
| + tt[5] = (FT_Byte)( ( val & 0x04 ) >> 2 );
|
| + tt[6] = (FT_Byte)( ( val & 0x02 ) >> 1 );
|
| + tt[7] = (FT_Byte)( val & 0x01 );
|
| +
|
| + tt += 8;
|
| + ss += 1;
|
| + }
|
| +
|
| + /* get remaining pixels (if any) */
|
| + j = source->width & 7;
|
| + if ( j > 0 )
|
| + {
|
| + FT_Int val = *ss;
|
| +
|
| +
|
| + for ( ; j > 0; j-- )
|
| + {
|
| + tt[0] = (FT_Byte)( ( val & 0x80 ) >> 7);
|
| + val <<= 1;
|
| + tt += 1;
|
| + }
|
| + }
|
| +
|
| + s += source->pitch;
|
| + t += target->pitch;
|
| + }
|
| + }
|
| + break;
|
| +
|
| +
|
| + case FT_PIXEL_MODE_GRAY:
|
| + case FT_PIXEL_MODE_LCD:
|
| + case FT_PIXEL_MODE_LCD_V:
|
| + {
|
| + FT_UInt width = source->width;
|
| + FT_UInt i;
|
| +
|
| +
|
| + target->num_grays = 256;
|
| +
|
| + for ( i = source->rows; i > 0; i-- )
|
| + {
|
| + FT_ARRAY_COPY( t, s, width );
|
| +
|
| + s += source->pitch;
|
| + t += target->pitch;
|
| + }
|
| + }
|
| + break;
|
| +
|
| +
|
| + case FT_PIXEL_MODE_GRAY2:
|
| + {
|
| + FT_UInt i;
|
| +
|
| +
|
| + target->num_grays = 4;
|
| +
|
| + for ( i = source->rows; i > 0; i-- )
|
| + {
|
| + FT_Byte* ss = s;
|
| + FT_Byte* tt = t;
|
| + FT_UInt j;
|
| +
|
| +
|
| + /* get the full bytes */
|
| + for ( j = source->width >> 2; j > 0; j-- )
|
| + {
|
| + FT_Int val = ss[0];
|
| +
|
| +
|
| + tt[0] = (FT_Byte)( ( val & 0xC0 ) >> 6 );
|
| + tt[1] = (FT_Byte)( ( val & 0x30 ) >> 4 );
|
| + tt[2] = (FT_Byte)( ( val & 0x0C ) >> 2 );
|
| + tt[3] = (FT_Byte)( ( val & 0x03 ) );
|
| +
|
| + ss += 1;
|
| + tt += 4;
|
| + }
|
| +
|
| + j = source->width & 3;
|
| + if ( j > 0 )
|
| + {
|
| + FT_Int val = ss[0];
|
| +
|
| +
|
| + for ( ; j > 0; j-- )
|
| + {
|
| + tt[0] = (FT_Byte)( ( val & 0xC0 ) >> 6 );
|
| + val <<= 2;
|
| + tt += 1;
|
| + }
|
| + }
|
| +
|
| + s += source->pitch;
|
| + t += target->pitch;
|
| + }
|
| + }
|
| + break;
|
| +
|
| +
|
| + case FT_PIXEL_MODE_GRAY4:
|
| + {
|
| + FT_UInt i;
|
| +
|
| +
|
| + target->num_grays = 16;
|
| +
|
| + for ( i = source->rows; i > 0; i-- )
|
| + {
|
| + FT_Byte* ss = s;
|
| + FT_Byte* tt = t;
|
| + FT_UInt j;
|
| +
|
| +
|
| + /* get the full bytes */
|
| + for ( j = source->width >> 1; j > 0; j-- )
|
| + {
|
| + FT_Int val = ss[0];
|
| +
|
| +
|
| + tt[0] = (FT_Byte)( ( val & 0xF0 ) >> 4 );
|
| + tt[1] = (FT_Byte)( ( val & 0x0F ) );
|
| +
|
| + ss += 1;
|
| + tt += 2;
|
| + }
|
| +
|
| + if ( source->width & 1 )
|
| + tt[0] = (FT_Byte)( ( ss[0] & 0xF0 ) >> 4 );
|
| +
|
| + s += source->pitch;
|
| + t += target->pitch;
|
| + }
|
| + }
|
| + break;
|
| +
|
| +
|
| + case FT_PIXEL_MODE_BGRA:
|
| + {
|
| + FT_UInt i;
|
| +
|
| +
|
| + target->num_grays = 256;
|
| +
|
| + for ( i = source->rows; i > 0; i-- )
|
| + {
|
| + FT_Byte* ss = s;
|
| + FT_Byte* tt = t;
|
| + FT_UInt j;
|
| +
|
| +
|
| + for ( j = source->width; j > 0; j-- )
|
| + {
|
| + tt[0] = ft_gray_for_premultiplied_srgb_bgra( ss );
|
| +
|
| + ss += 4;
|
| + tt += 1;
|
| + }
|
| +
|
| + s += source->pitch;
|
| + t += target->pitch;
|
| + }
|
| + }
|
| + break;
|
| +
|
| + default:
|
| + ;
|
| + }
|
| +
|
| + return error;
|
| + }
|
| +
|
| +
|
| + /* documentation is in ftbitmap.h */
|
| +
|
| + FT_EXPORT_DEF( FT_Error )
|
| + FT_GlyphSlot_Own_Bitmap( FT_GlyphSlot slot )
|
| + {
|
| + if ( slot && slot->format == FT_GLYPH_FORMAT_BITMAP &&
|
| + !( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) )
|
| + {
|
| + FT_Bitmap bitmap;
|
| + FT_Error error;
|
| +
|
| +
|
| + FT_Bitmap_Init( &bitmap );
|
| + error = FT_Bitmap_Copy( slot->library, &slot->bitmap, &bitmap );
|
| + if ( error )
|
| + return error;
|
| +
|
| + slot->bitmap = bitmap;
|
| + slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
|
| + }
|
| +
|
| + return FT_Err_Ok;
|
| + }
|
| +
|
| +
|
| + /* documentation is in ftbitmap.h */
|
| +
|
| + FT_EXPORT_DEF( FT_Error )
|
| + FT_Bitmap_Done( FT_Library library,
|
| + FT_Bitmap *bitmap )
|
| + {
|
| + FT_Memory memory;
|
| +
|
| +
|
| + if ( !library )
|
| + return FT_THROW( Invalid_Library_Handle );
|
| +
|
| + if ( !bitmap )
|
| + return FT_THROW( Invalid_Argument );
|
| +
|
| + memory = library->memory;
|
| +
|
| + FT_FREE( bitmap->buffer );
|
| + *bitmap = null_bitmap;
|
| +
|
| + return FT_Err_Ok;
|
| + }
|
| +
|
| +
|
| +/* END */
|
|
|