/** * @file rs274x.cpp */ #include #include #include #include #include extern int ReadInt( char*& text, bool aSkipSeparator = true ); extern double ReadDouble( char*& text, bool aSkipSeparator = true ); #define CODE( x, y ) ( ( (x) << 8 ) + (y) ) // See rs274xrevd_e.pdf, table 1: RS-274X parameters order of entry // in gerber files, when a coordinate is given (like X78Y600 or I0J80): // Y and Y are logical coordinates // A and B are plotter coordiantes // Usually A = X, B = Y // But we can have A = Y, B = X and/or offset, mirror, scale; // Also: // Image is what you must plot (the entire data of the file). // Layer is just a set of data blocks with their parameters. An image can have more than one // layer so a gerber layer is not like a board layer or the graphic layers used in GerbView // to show a file. enum RS274X_PARAMETERS { // Directive parameters: single usage recommended // Must be at the beginning of the file AXIS_SELECT = CODE( 'A', 'S' ), // Default: A=X, B=Y FORMAT_STATEMENT = CODE( 'F', 'S' ), // no default: this command must exists MIRROR_IMAGE = CODE( 'M', 'I' ), // Default: mo mirror MODE_OF_UNITS = CODE( 'M', 'O' ), // Default: inch INCH = CODE( 'I', 'N' ), MILLIMETER = CODE( 'M', 'M' ), OFFSET = CODE( 'O', 'F' ), // Default: A = 0, B = 0 SCALE_FACTOR = CODE( 'S', 'F' ), // Default: A = 1.0, B = 1.0 // Image parameters: // commands used only once at the beginning of the file IMAGE_JUSTIFY = CODE( 'I', 'J' ), // Default: no justification IMAGE_NAME = CODE( 'I', 'N' ), // Default: void IMAGE_OFFSET = CODE( 'I', 'O' ), // Default: A = 0, B = 0 IMAGE_POLARITY = CODE( 'I', 'P' ), // Default: Positive IMAGE_ROTATION = CODE( 'I', 'R' ), // Default: 0 PLOTTER_FILM = CODE( 'P', 'M' ), // Aperture parameters: // Usually for the whole file AP_DEFINITION = CODE( 'A', 'D' ), AP_MACRO = CODE( 'A', 'M' ), // Layer specific parameters // May be used singly or may be layer specfic // theses parameters are at the beginning of the file or layer // and reset some layer parameters (like interpolation) LAYER_NAME = CODE( 'L', 'N' ), // Default: Positive LAYER_POLARITY = CODE( 'L', 'P' ), KNOCKOUT = CODE( 'K', 'O' ), // Default: off STEP_AND_REPEAT = CODE( 'S', 'R' ), // Default: A = 1, B = 1 ROTATE = CODE( 'R', 'O' ), // Default: 0 // Miscellaneous parameters: INCLUDE_FILE = CODE( 'I', 'F' ) }; /** * Function ReadXCommand * reads in two bytes of data and assembles them into an int with the first * byte in the sequence put into the most significant part of a 16 bit value * and the second byte put into the least significant part of the 16 bit value. * @param text A reference to a pointer to read bytes from and to advance as * they are read. * @return int - with 16 bits of data in the ls bits, upper bits zeroed. */ static int ReadXCommand( char*& text ) { int result; if( text && *text ) result = *text++ << 8; else return -1; if( text && *text ) result += *text++; else return -1; return result; } bool GERBER_IMAGE::ReadRS274XCommand( char buff[GERBER_BUFZ], char*& text ) { bool ok = true; int code_command; text++; for( ; ; ) { while( *text ) { switch( *text ) { case '%': // end of command text++; m_CommandState = CMD_IDLE; goto exit; // success completion case ' ': case '\r': case '\n': text++; break; case '*': text++; break; default: code_command = ReadXCommand( text ); ok = ExecuteRS274XCommand( code_command, buff, text ); if( !ok ) goto exit; break; } } // end of current line, read another one. if( fgets( buff, GERBER_BUFZ, m_Current_File ) == NULL ) { // end of file ok = false; break; } text = buff; } exit: return ok; } bool GERBER_IMAGE::ExecuteRS274XCommand( int command, char buff[GERBER_BUFZ], char*& text ) { int code; int xy_seq_len, xy_seq_char; bool ok = true; char line[GERBER_BUFZ]; wxString msg; double fcoord; double conv_scale = m_GerbMetric ? PCB_INTERNAL_UNIT / 25.4 : PCB_INTERNAL_UNIT; // D( printf( "%22s: Command <%c%c>\n", __func__, (command >> 8) & 0xFF, command & 0xFF ); ) switch( command ) { case FORMAT_STATEMENT: xy_seq_len = 2; while( *text != '*' ) { switch( *text ) { case ' ': text++; break; case 'L': // No Leading 0 m_DecimalFormat = false; m_NoTrailingZeros = false; text++; break; case 'T': // No trailing 0 m_DecimalFormat = false; m_NoTrailingZeros = true; text++; break; case 'D': // Decimal format: sometimes found, but not really documented m_DecimalFormat = true; text++; break; case 'A': // Absolute coord m_Relative = false; text++; break; case 'I': // Relative coord m_Relative = true; text++; break; case 'N': // Sequence code (followed by the number of digits // for the X,Y command text++; xy_seq_char = *text++; if( (xy_seq_char >= '0') && (xy_seq_char <= '9') ) xy_seq_len = -'0'; break; case 'X': case 'Y': // Values transmitted :2 (really xy_seq_len : FIX // ME) digits { code = *(text++); char ctmp = *(text++) - '0'; if( code == 'X' ) { // number of digits after the decimal point (0 to 6 allowed) m_FmtScale.x = *text - '0'; m_FmtLen.x = ctmp + m_FmtScale.x; // m_FmtScale is 0 to 6 if( m_FmtScale.x < 0 ) m_FmtScale.x = 0; if( m_FmtScale.x > 6 ) m_FmtScale.x = 6; } else { m_FmtScale.y = *text - '0'; m_FmtLen.y = ctmp + m_FmtScale.y; if( m_FmtScale.y < 0 ) m_FmtScale.y = 0; if( m_FmtScale.y > 6 ) m_FmtScale.y = 6; } text++; } break; case '*': break; default: GetEndOfBlock( buff, text, m_Current_File ); ok = false; break; } } break; case AXIS_SELECT: // command ASAXBY*% or %ASAYBX*% m_SwapAxis = false; if( strnicmp( text, "AYBX", 4 ) == 0 ) m_SwapAxis = true; break; case MIRROR_IMAGE: // commanf %MIA0B0*%, %MIA0B1*%, %MIA1B0*%, %MIA1B1*% m_MirrorA = m_MirrorB = 0; while( *text && *text != '*' ) { switch( *text ) { case 'A': // Mirror A axis ? text++; if( *text == '1' ) m_MirrorA = true; break; case 'B': // Mirror B axis ? text++; if( *text == '1' ) m_MirrorB = true; break; default: text++; break; } } break; case MODE_OF_UNITS: code = ReadXCommand( text ); if( code == INCH ) m_GerbMetric = false; else if( code == MILLIMETER ) m_GerbMetric = true; conv_scale = m_GerbMetric ? PCB_INTERNAL_UNIT / 25.4 : PCB_INTERNAL_UNIT; break; case OFFSET: // command: OFAnnBnn (nn = float number) = layer Offset m_Offset.x = m_Offset.y = 0; while( *text != '*' ) { switch( *text ) { case 'A': // A axis offset in current unit (inch or mm) text++; fcoord = ReadDouble( text ); m_Offset.x = wxRound( fcoord * conv_scale ); break; case 'B': // B axis offset in current unit (inch or mm) text++; fcoord = ReadDouble( text ); m_Offset.y = wxRound( fcoord * conv_scale ); break; } } break; case SCALE_FACTOR: m_Scale.x = m_Scale.y = 1.0; while( *text != '*' ) { switch( *text ) { case 'A': // A axis scale text++; m_Scale.x = ReadDouble( text ); break; case 'B': // B axis scale text++; m_Scale.y = ReadDouble( text ); break; } } break; case IMAGE_OFFSET: // command: IOAnnBnn (nn = float number) = Image Offset m_ImageOffset.x = m_ImageOffset.y = 0; while( *text != '*' ) { switch( *text ) { case 'A': // A axis offset in current unit (inch or mm) text++; fcoord = ReadDouble( text ); m_ImageOffset.x = wxRound( fcoord * conv_scale ); break; case 'B': // B axis offset in current unit (inch or mm) text++; fcoord = ReadDouble( text ); m_ImageOffset.y = wxRound( fcoord * conv_scale ); break; } } break; case IMAGE_ROTATION: // command IR0* or IR90* or IR180* or IR270* if( strnicmp( text, "0*", 2 ) == 0 ) m_ImageRotation = 0; if( strnicmp( text, "90*", 2 ) == 0 ) m_ImageRotation = 90; if( strnicmp( text, "180*", 2 ) == 0 ) m_ImageRotation = 180; if( strnicmp( text, "270*", 2 ) == 0 ) m_ImageRotation = 270; else ReportMessage( _( "RS274X: Command \"IR\" rotation value not allowed" ) ); break; case STEP_AND_REPEAT: // command SR, like %SRX3Y2I5.0J2*% m_Iterpolation = GERB_INTERPOL_LINEAR_1X; // Start a new Gerber layer GetLayerParams().m_StepForRepeat.x = 0.0; GetLayerParams().m_StepForRepeat.x = 0.0; // offset for Step and Repeat command GetLayerParams().m_XRepeatCount = 1; GetLayerParams().m_YRepeatCount = 1; // The repeat count GetLayerParams().m_StepForRepeatMetric = m_GerbMetric; // the step units while( *text && *text != '*' ) { switch( *text ) { case 'I': // X axis offset text++; GetLayerParams().m_StepForRepeat.x = ReadDouble( text ); break; case 'J': // Y axis offset text++; GetLayerParams().m_StepForRepeat.y = ReadDouble( text ); break; case 'X': // X axis repeat count text++; GetLayerParams().m_XRepeatCount = ReadInt( text ); break; case 'Y': // Y axis offset text++; GetLayerParams().m_YRepeatCount = ReadInt( text ); break; default: text++; break; } } break; case IMAGE_JUSTIFY: // Command IJAnBn* m_ImageJustifyXCenter = false; // Image Justify Center on X axis (default = false) m_ImageJustifyYCenter = false; // Image Justify Center on Y axis (default = false) m_ImageJustifyOffset = wxPoint(0,0); // Image Justify Offset on XY axis (default = 0,0) while( *text && *text != '*' ) { // IJ command is (for A or B axis) AC or AL or A switch( *text ) { case 'A': // A axis justify text++; if( *text == 'C' ) { m_ImageJustifyXCenter = true; text++; } else if( *text == 'L' ) { m_ImageJustifyXCenter = true; text++; } else m_ImageJustifyOffset.x = wxRound( ReadDouble( text ) * conv_scale); break; case 'B': // B axis justify text++; if( *text == 'C' ) { m_ImageJustifyYCenter = true; text++; } else if( *text == 'L' ) { m_ImageJustifyYCenter = true; text++; } else m_ImageJustifyOffset.y = wxRound( ReadDouble( text ) * conv_scale); break; default: text++; break; } } if( m_ImageJustifyXCenter ) m_ImageJustifyOffset.x = 0; if( m_ImageJustifyYCenter ) m_ImageJustifyOffset.y = 0; break; case KNOCKOUT: m_Iterpolation = GERB_INTERPOL_LINEAR_1X; // Start a new Gerber layer msg = _( "RS274X: Command KNOCKOUT ignored by GerbView" ) ; ReportMessage( msg ); break; case PLOTTER_FILM: // Command PF // This is an info about film that must be used to plot this file // Has no meaning here. We just display this string msg = wxT( "Plotter Film info:
" ); while( *text != '*' ) { msg.Append( *text++ ); } ReportMessage( msg ); break; case ROTATE: // Layer rotation: command like %RO45*% m_Iterpolation = GERB_INTERPOL_LINEAR_1X; // Start a new Gerber layer m_LocalRotation =ReadDouble( text ); // Store layer rotation in degrees break; case IMAGE_NAME: m_ImageName.Empty(); while( *text != '*' ) { m_ImageName.Append( *text++ ); } break; case LAYER_NAME: m_Iterpolation = GERB_INTERPOL_LINEAR_1X; // Start a new Gerber layer GetLayerParams( ).m_LayerName.Empty(); while( *text != '*' ) { GetLayerParams( ).m_LayerName.Append( *text++ ); } break; case IMAGE_POLARITY: if( strnicmp( text, "NEG", 3 ) == 0 ) m_ImageNegative = true; else m_ImageNegative = false; D( printf( "%22s: IMAGE_POLARITY m_ImageNegative=%s\n", __func__, m_ImageNegative ? "true" : "false" ); ) break; case LAYER_POLARITY: if( *text == 'C' ) GetLayerParams().m_LayerNegative = true; else GetLayerParams().m_LayerNegative = false; D( printf( "%22s: LAYER_POLARITY m_LayerNegative=%s\n", __func__, GetLayerParams().m_LayerNegative ? "true" : "false" ); ) break; case INCLUDE_FILE: if( m_FilesPtr >= INCLUDE_FILES_CNT_MAX ) { ok = false; ReportMessage( _( "Too many include files!!" ) ); break; } strcpy( line, text ); strtok( line, "*%%\n\r" ); m_FilesList[m_FilesPtr] = m_Current_File; m_Current_File = fopen( line, "rt" ); if( m_Current_File == 0 ) { msg.Printf( wxT( "include file <%s> not found." ), line ); ReportMessage( msg ); ok = false; m_Current_File = m_FilesList[m_FilesPtr]; break; } m_FilesPtr++; break; case AP_MACRO: // lines like %AMMYMACRO* // 5,1,8,0,0,1.08239X$1,22.5* // % ok = ReadApertureMacro( buff, text, m_Current_File ); break; case AP_DEFINITION: /* input example: %ADD30R,0.081800X0.101500*% * Aperture definition has 4 options: C, R, O, P * (Circle, Rect, Oval, regular Polygon) * and shapes can have a hole (round or rectangular). * All optional parameters values start by X * at this point, text points to 2nd 'D' */ if( *text++ != 'D' ) { ok = false; break; } m_Has_DCode = true; code = ReadInt( text ); D_CODE* dcode; dcode = GetDCODE( code ); if( dcode == NULL ) break; // at this point, text points to character after the ADD, // i.e. R in example above. If text[0] is one of the usual // apertures: (C,R,O,P), there is a comma after it. if( text[1] == ',' ) { char stdAperture = *text; text += 2; // skip "C," for example dcode->m_Size.x = dcode->m_Size.y = wxRound( ReadDouble( text ) * conv_scale ); switch( stdAperture ) // Aperture desceiption has optional parameters. Read them { case 'C': // Circle dcode->m_Shape = APT_CIRCLE; while( *text == ' ' ) text++; if( *text == 'X' ) { text++; dcode->m_Drill.x = dcode->m_Drill.y = wxRound( ReadDouble( text ) * conv_scale ); dcode->m_DrillShape = APT_DEF_ROUND_HOLE; } while( *text == ' ' ) text++; if( *text == 'X' ) { text++; dcode->m_Drill.y = wxRound( ReadDouble( text ) * conv_scale ); dcode->m_DrillShape = APT_DEF_RECT_HOLE; } dcode->m_Defined = true; break; case 'O': // oval case 'R': // rect dcode->m_Shape = (stdAperture == 'O') ? APT_OVAL : APT_RECT; while( *text == ' ' ) text++; if( *text == 'X' ) { text++; dcode->m_Size.y = wxRound( ReadDouble( text ) * conv_scale ); } while( *text == ' ' ) text++; if( *text == 'X' ) { text++; dcode->m_Drill.x = dcode->m_Drill.y = wxRound( ReadDouble( text ) * conv_scale ); dcode->m_DrillShape = APT_DEF_ROUND_HOLE; } while( *text == ' ' ) text++; if( *text == 'X' ) { text++; dcode->m_Drill.y = wxRound( ReadDouble( text ) * conv_scale ); dcode->m_DrillShape = APT_DEF_RECT_HOLE; } dcode->m_Defined = true; break; case 'P': /* Regular polygon: a command line like %ADD12P,0.040X10X25X0.025X0.025X0.0150*% * params are: , X, X, X, X */ dcode->m_Shape = APT_POLYGON; while( *text == ' ' ) text++; if( *text == 'X' ) { text++; dcode->m_EdgesCount = ReadInt( text ); } while( *text == ' ' ) text++; if( *text == 'X' ) { text++; dcode->m_Rotation = ReadDouble( text ); } while( *text == ' ' ) text++; if( *text == 'X' ) { text++; dcode->m_Drill.x = dcode->m_Drill.y = wxRound( ReadDouble( text ) * conv_scale ); dcode->m_DrillShape = APT_DEF_ROUND_HOLE; } while( *text == ' ' ) text++; if( *text == 'X' ) { text++; dcode->m_Drill.y = wxRound( ReadDouble( text ) * conv_scale ); dcode->m_DrillShape = APT_DEF_RECT_HOLE; } dcode->m_Defined = true; break; } } else // text[0] starts an aperture macro name { APERTURE_MACRO am_lookup; while( *text && *text != '*' && *text != ',' ) am_lookup.name.Append( *text++ ); // When an aperture definition is like %AMLINE2* 22,1,$1,$2,0,0,-45* // the ADDxx command has parameters, like %ADD14LINE2,0.8X0.5*% if( *text == ',' ) { // Read aperture macro parameters and store them text++; // text points the first parameter while( *text && *text != '*' ) { double param = ReadDouble( text ); dcode->AppendParam( param ); while( isspace( *text ) ) text++; if( *text == 'X' ) ++text; } } // lookup the aperture macro here. APERTURE_MACRO* pam = FindApertureMacro( am_lookup ); if( !pam ) { msg.Printf( wxT( "RS274X: aperture macro %s not found\n" ), TO_UTF8( am_lookup.name ) ); ReportMessage( msg ); ok = false; break; } dcode->m_Shape = APT_MACRO; dcode->SetMacro( (APERTURE_MACRO*) pam ); } break; default: ok = false; break; } ok = GetEndOfBlock( buff, text, m_Current_File ); return ok; } bool GetEndOfBlock( char buff[GERBER_BUFZ], char*& text, FILE* gerber_file ) { for( ; ; ) { while( (text < buff + GERBER_BUFZ) && *text ) { if( *text == '*' ) return true; if( *text == '%' ) return true; text++; } if( fgets( buff, GERBER_BUFZ, gerber_file ) == NULL ) break; text = buff; } return false; } /** * Function GetNextLine * test for an end of line * if an end of line is found: * read a new line * @param aBuff = buffer (size = GERBER_BUFZ) to fill with a new line * @param aText = pointer to the last useful char in aBuff * on return: points the beginning of the next line. * @param aFile = the opened GERBER file to read * @return a pointer to the beginning of the next line or NULL if end of file */ static char* GetNextLine( char aBuff[GERBER_BUFZ], char* aText, FILE* aFile ) { for( ; ; ) { switch (*aText ) { case ' ': // skip blanks case '\n': case '\r': // Skip line terminators ++aText; break; case 0: // End of text found in aBuff: Read a new string if( fgets( aBuff, GERBER_BUFZ, aFile ) == NULL ) return NULL; aText = aBuff; return aText; default: return aText; } } return aText; } bool GERBER_IMAGE::ReadApertureMacro( char buff[GERBER_BUFZ], char*& text, FILE* gerber_file ) { wxString msg; APERTURE_MACRO am; // read macro name while( *text ) { if( *text == '*' ) { ++text; break; } am.name.Append( *text++ ); } // Read aperture macro parameters for( ; ; ) { if( *text == '*' ) ++text; text = GetNextLine( buff, text, gerber_file ); // Get next line if( text == NULL ) // End of File return false; // text points the beginning of a new line. // Test for the last line in aperture macro lis: // last line is % or *% sometime found. if( *text == '*' ) ++text; if( *text == '%' ) break; // exit with text still pointing at % int paramCount = 0; int primitive_type = AMP_UNKNOWN; // Test for a valid symbol at the beginning of a description: // it can be: a parameter declaration like $1=$2/4 // or a digit (macro primitive selection) // all other symbols are illegal. if( *text == '$' ) // local parameter declaration, inside the aperture macro { am.m_localparamStack.push_back( AM_PARAM() ); AM_PARAM& param = am.m_localparamStack.back(); text = GetNextLine( buff, text, gerber_file ); if( text == NULL) // End of File return false; param.ReadParam( text ); continue; } else if( !isdigit(*text) ) // Ill. symbol { msg.Printf( wxT( "RS274X: Aperture Macro \"%s\": ill. symbol, line: \"%s\"" ), GetChars( am.name ), GetChars( FROM_UTF8( buff ) ) ); ReportMessage( msg ); primitive_type = AMP_COMMENT; } else primitive_type = ReadInt( text ); switch( primitive_type ) { case AMP_COMMENT: // lines starting by 0 are a comment paramCount = 0; // Skip comment while( *text && (*text != '*') ) text++; break; case AMP_CIRCLE: paramCount = 4; break; case AMP_LINE2: case AMP_LINE20: paramCount = 7; break; case AMP_LINE_CENTER: case AMP_LINE_LOWER_LEFT: paramCount = 6; break; case AMP_EOF: paramCount = 0; break; case AMP_OUTLINE: paramCount = 4; break; case AMP_POLYGON: paramCount = 6; break; case AMP_MOIRE: paramCount = 9; break; case AMP_THERMAL: paramCount = 6; break; default: // @todo, there needs to be a way of reporting the line number msg.Printf( wxT( "RS274X: Aperture Macro \"%s\": Invalid primitive id code %d, line: \"%s\"" ), GetChars( am.name ), primitive_type, GetChars( FROM_UTF8( buff ) ) ); ReportMessage( msg ); return false; } AM_PRIMITIVE prim( m_GerbMetric ); prim.primitive_id = (AM_PRIMITIVE_ID) primitive_type; int i; for( i = 0; i < paramCount && *text && *text != '*'; ++i ) { prim.params.push_back( AM_PARAM() ); AM_PARAM& param = prim.params.back(); text = GetNextLine( buff, text, gerber_file ); if( text == NULL) // End of File return false; param.ReadParam( text ); } if( i < paramCount ) { // maybe some day we can throw an exception and track a line number msg.Printf( wxT( "RS274X: read macro descr type %d: read %d parameters, insufficient parameters\n" ), prim.primitive_id, i ); ReportMessage( msg ); } // there are more parameters to read if this is an AMP_OUTLINE if( prim.primitive_id == AMP_OUTLINE ) { // so far we have read [0]:exposure, [1]:#points, [2]:X start, [3]: Y start // Now read all the points, plus trailing rotation in degrees. // params[1] is a count of polygon points, so it must be given // in advance, i.e. be immediate. wxASSERT( prim.params[1].IsImmediate() ); paramCount = (int) prim.params[1].GetValue( 0 ) * 2 + 1; for( int i = 0; i < paramCount && *text != '*'; ++i ) { prim.params.push_back( AM_PARAM() ); AM_PARAM& param = prim.params.back(); text = GetNextLine( buff, text, gerber_file ); if( text == NULL ) // End of File return false; param.ReadParam( text ); } } am.primitives.push_back( prim ); } m_aperture_macros.insert( am ); return true; }