ft_bitmap_assure_buffer FT_Bitmap_Convert FT_Bitmap_Copy FT_Bitmap_Done FT_Bitmap_Embolden FT_Bitmap_New FT_GlyphSlot_Own_Bitmap null_bitmap

static FT_Error ft_bitmap_assure_buffer ( FT_Memory  memory, FT_Bitmap *  bitmap, FT_UInt  xpixels, FT_UInt  ypixels  ) [static] Definition at line 98 of file ftbitmap.c. Referenced by FT_Bitmap_Embolden(). { 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; }