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Diffstat (limited to 'src/base/ftbitmap.c')
| -rw-r--r-- | src/base/ftbitmap.c | 630 |
1 files changed, 0 insertions, 630 deletions
diff --git a/src/base/ftbitmap.c b/src/base/ftbitmap.c deleted file mode 100644 index 4c1cdf2..0000000 --- a/src/base/ftbitmap.c +++ /dev/null @@ -1,630 +0,0 @@ -/***************************************************************************/ -/* */ -/* ftbitmap.c */ -/* */ -/* FreeType utility functions for converting 1bpp, 2bpp, 4bpp, and 8bpp */ -/* bitmaps into 8bpp format (body). */ -/* */ -/* Copyright 2004, 2005, 2006, 2007 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_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; - - xstr = FT_PIX_ROUND( xStrength ) >> 6; - ystr = 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: - { - 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: - { - 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_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 */ |