--- a/misc/libfreetype/src/base/ftbitmap.c Tue Jul 16 11:14:27 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,663 +0,0 @@
-/***************************************************************************/
-/* */
-/* ftbitmap.c */
-/* */
-/* FreeType utility functions for bitmaps (body). */
-/* */
-/* Copyright 2004, 2005, 2006, 2007, 2008, 2009 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_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_New( FT_Bitmap *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 = library->memory;
- FT_Error error = FT_Err_Ok;
- FT_Int pitch = source->pitch;
- FT_ULong size;
-
-
- if ( source == target )
- return FT_Err_Ok;
-
- if ( source->buffer == NULL )
- {
- *target = *source;
-
- return FT_Err_Ok;
- }
-
- 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;
-
- FT_MEM_COPY( target->buffer, source->buffer, size );
- }
-
- return error;
- }
-
-
- 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_Int i, width, height;
- unsigned char* buffer;
-
-
- 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 = ( width + xpixels + 7 ) >> 3;
- break;
- case FT_PIXEL_MODE_GRAY2:
- bpp = 2;
- new_pitch = ( width + xpixels + 3 ) >> 2;
- break;
- case FT_PIXEL_MODE_GRAY4:
- bpp = 4;
- new_pitch = ( 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 = ( width + xpixels );
- break;
- default:
- return FT_Err_Invalid_Glyph_Format;
- }
-
- /* if no need to allocate memory */
- if ( ypixels == 0 && new_pitch <= pitch )
- {
- /* zero the padding */
- FT_Int bit_width = pitch * 8;
- FT_Int 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_Int shift = bit_last & 7;
- FT_UInt mask = 0xFF00U >> shift;
- FT_Int 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;
- }
-
- if ( FT_QALLOC_MULT( buffer, new_pitch, bitmap->rows + ypixels ) )
- return error;
-
- if ( bitmap->pitch > 0 )
- {
- FT_Int len = ( width * bpp + 7 ) >> 3;
-
-
- for ( i = 0; i < bitmap->rows; i++ )
- FT_MEM_COPY( buffer + new_pitch * ( ypixels + i ),
- bitmap->buffer + pitch * i, len );
- }
- else
- {
- FT_Int len = ( width * bpp + 7 ) >> 3;
-
-
- for ( i = 0; i < bitmap->rows; i++ )
- FT_MEM_COPY( buffer + new_pitch * i,
- bitmap->buffer + 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, y, pitch;
- FT_Int xstr, ystr;
-
-
- if ( !library )
- return FT_Err_Invalid_Library_Handle;
-
- if ( !bitmap || !bitmap->buffer )
- return FT_Err_Invalid_Argument;
-
- if ( ( ( FT_PIX_ROUND( xStrength ) >> 6 ) > FT_INT_MAX ) ||
- ( ( FT_PIX_ROUND( yStrength ) >> 6 ) > FT_INT_MAX ) )
- return FT_Err_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_Err_Invalid_Argument;
-
- switch ( bitmap->pixel_mode )
- {
- case FT_PIXEL_MODE_GRAY2:
- case FT_PIXEL_MODE_GRAY4:
- {
- FT_Bitmap tmp;
- FT_Int align;
-
-
- if ( bitmap->pixel_mode == FT_PIXEL_MODE_GRAY2 )
- align = ( bitmap->width + xstr + 3 ) / 4;
- else
- align = ( bitmap->width + xstr + 1 ) / 2;
-
- FT_Bitmap_New( &tmp );
-
- error = FT_Bitmap_Convert( library, bitmap, &tmp, align );
- 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;
- }
-
- error = ft_bitmap_assure_buffer( library->memory, bitmap, xstr, ystr );
- if ( error )
- return error;
-
- pitch = bitmap->pitch;
- if ( pitch > 0 )
- p = bitmap->buffer + pitch * ystr;
- else
- {
- pitch = -pitch;
- p = bitmap->buffer + 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 += xstr;
- bitmap->rows += ystr;
-
- return FT_Err_Ok;
- }
-
-
- /* 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;
-
-
- if ( !library )
- return FT_Err_Invalid_Library_Handle;
-
- 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:
- {
- FT_Int pad;
- FT_Long old_size;
-
-
- old_size = target->rows * target->pitch;
- if ( old_size < 0 )
- old_size = -old_size;
-
- target->pixel_mode = FT_PIXEL_MODE_GRAY;
- target->rows = source->rows;
- target->width = source->width;
-
- pad = 0;
- if ( alignment > 0 )
- {
- pad = source->width % alignment;
- if ( pad != 0 )
- pad = alignment - pad;
- }
-
- target->pitch = source->width + pad;
-
- if ( target->rows * target->pitch > old_size &&
- FT_QREALLOC( target->buffer,
- old_size, target->rows * target->pitch ) )
- return error;
- }
- break;
-
- default:
- error = FT_Err_Invalid_Argument;
- }
-
- switch ( source->pixel_mode )
- {
- case FT_PIXEL_MODE_MONO:
- {
- FT_Byte* s = source->buffer;
- FT_Byte* t = target->buffer;
- FT_Int i;
-
-
- target->num_grays = 2;
-
- for ( i = source->rows; i > 0; i-- )
- {
- FT_Byte* ss = s;
- FT_Byte* tt = t;
- FT_Int 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_Int width = source->width;
- FT_Byte* s = source->buffer;
- FT_Byte* t = target->buffer;
- FT_Int s_pitch = source->pitch;
- FT_Int t_pitch = target->pitch;
- FT_Int i;
-
-
- target->num_grays = 256;
-
- for ( i = source->rows; i > 0; i-- )
- {
- FT_ARRAY_COPY( t, s, width );
-
- s += s_pitch;
- t += t_pitch;
- }
- }
- break;
-
-
- case FT_PIXEL_MODE_GRAY2:
- {
- FT_Byte* s = source->buffer;
- FT_Byte* t = target->buffer;
- FT_Int i;
-
-
- target->num_grays = 4;
-
- for ( i = source->rows; i > 0; i-- )
- {
- FT_Byte* ss = s;
- FT_Byte* tt = t;
- FT_Int 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_Byte* s = source->buffer;
- FT_Byte* t = target->buffer;
- FT_Int i;
-
-
- target->num_grays = 16;
-
- for ( i = source->rows; i > 0; i-- )
- {
- FT_Byte* ss = s;
- FT_Byte* tt = t;
- FT_Int 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;
-
-
- 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_New( &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_Err_Invalid_Library_Handle;
-
- if ( !bitmap )
- return FT_Err_Invalid_Argument;
-
- memory = library->memory;
-
- FT_FREE( bitmap->buffer );
- *bitmap = null_bitmap;
-
- return FT_Err_Ok;
- }
-
-
-/* END */