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kicad/gerbview/rs274d.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 1992-2023 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @brief functions to read the rs274d commands from a rs274d/rs274x file
*/
#include <gerbview.h>
#include <gerbview_frame.h>
#include <trigo.h>
#include <gerber_file_image.h>
#include <X2_gerber_attributes.h>
#include <cmath>
/* Gerber: NOTES about some important commands found in RS274D and RS274X (G codes).
* Some are now deprecated, but deprecated commands must be known by the Gerber reader
* Gn =
* G01 linear interpolation (linear trace)
* G02, G20, G21 Circular interpolation, clockwise
* G03, G30, G31 Circular interpolation, counterclockwise
* G04 = comment. Since Sept 2014, file attributes and other X2 attributes can be found here
* if the line starts by G04 #@!
* G06 parabolic interpolation
* G07 Cubic Interpolation
* G10 linear interpolation (scale x10)
* G11 linear interpolation (0.1x range)
* G12 linear interpolation (0.01x scale)
* G36 Start polygon mode (called a region, because the "polygon" can include arcs)
* G37 Stop polygon mode (and close it)
* G54 Selection Tool (outdated)
* G60 linear interpolation (scale x100)
* G70 Select Units = Inches
* G71 Select Units = Millimeters
* G74 enable 90 deg mode for arcs (CW or CCW)
* G75 enable 360 degrees for arcs (CW or CCW)
* G90 mode absolute coordinates
*
* X, Y
* X and Y are followed by + or - and m + n digits (not separated)
* m = integer part
* n = part after the comma
*ic formats: m = 2, n = 3 (size 2.3)
* m = 3, n = 4 (size 3.4)
* eg
* GxxX00345Y-06123*
*
* Tools and D_CODES
* Tool number (identification of shapes)
* 10 to 999
* D_CODES:
* D01 ... D9 = command codes:
* D01 = activating light (pen down) when placement
* D02 = light extinction (pen up) when placement
* D03 = Flash
* D09 = VAPE Flash (I never see this command in Gerber file)
* D51 = G54 preceded by -> Select VAPE
*
* D10 ... D999 = Identification Tool: tool selection
*/
/* Local Functions (are lower case since they are private to this source file)
**/
/**
* Initializes a given GBRITEM so that it can draw a circle which is filled and
* has no pen border.
*
* @param aGbrItem The GBRITEM to fill in.
* @param aAperture the associated type of aperture.
* @param Dcode_index The DCODE value, like D14.
* @param aPos The center point of the flash.
* @param aSize The diameter of the round flash.
* @param aLayerNegative set to true if the current layer is negative.
*/
void fillFlashedGBRITEM( GERBER_DRAW_ITEM* aGbrItem,
APERTURE_T aAperture,
int Dcode_index,
const VECTOR2I& aPos,
VECTOR2I aSize,
bool aLayerNegative )
{
aGbrItem->m_Size = aSize;
aGbrItem->m_Start = aPos;
aGbrItem->m_End = aGbrItem->m_Start;
aGbrItem->m_DCode = Dcode_index;
aGbrItem->SetLayerPolarity( aLayerNegative );
aGbrItem->m_Flashed = true;
aGbrItem->SetNetAttributes( aGbrItem->m_GerberImageFile->m_NetAttributeDict );
switch( aAperture )
{
case APT_POLYGON: // flashed regular polygon
aGbrItem->m_ShapeType = GBR_SPOT_POLY;
break;
case APT_CIRCLE:
aGbrItem->m_ShapeType = GBR_SPOT_CIRCLE;
aGbrItem->m_Size.y = aGbrItem->m_Size.x;
break;
case APT_OVAL:
aGbrItem->m_ShapeType = GBR_SPOT_OVAL;
break;
case APT_RECT:
aGbrItem->m_ShapeType = GBR_SPOT_RECT;
break;
case APT_MACRO:
aGbrItem->m_ShapeType = GBR_SPOT_MACRO;
// Cache the bounding box for aperture macros
aGbrItem->GetDcodeDescr()->GetMacro()->GetApertureMacroShape( aGbrItem, aPos );
break;
}
}
/**
* Initialize a given GBRITEM so that it can draw a linear D code.
*
* @param aGbrItem The GERBER_DRAW_ITEM to fill in.
* @param Dcode_index The DCODE value, like D14.
* @param aStart The starting point of the line.
* @param aEnd The ending point of the line.
* @param aPenSize The size of the flash. Note rectangular shapes are legal.
* @param aLayerNegative set to true if the current layer is negative.
*/
void fillLineGBRITEM( GERBER_DRAW_ITEM* aGbrItem,
int Dcode_index,
const VECTOR2I& aStart,
const VECTOR2I& aEnd,
VECTOR2I aPenSize,
bool aLayerNegative )
{
aGbrItem->m_Flashed = false;
aGbrItem->m_Size = aPenSize;
aGbrItem->m_Start = aStart;
aGbrItem->m_End = aEnd;
aGbrItem->m_DCode = Dcode_index;
aGbrItem->SetLayerPolarity( aLayerNegative );
aGbrItem->SetNetAttributes( aGbrItem->m_GerberImageFile->m_NetAttributeDict );
}
/**
* Initialize a given GBRITEM so that it can draw an arc G code.
*
* If multiquadrant == true : arc can be 0 to 360 degrees
* and \a rel_center is the center coordinate relative to start point.
*
* If multiquadrant == false arc can be only 0 to 90 deg,
* and only in the same quadrant :
* <ul>
* <li> absolute angle 0 to 90 (quadrant 1) or
* <li> absolute angle 90 to 180 (quadrant 2) or
* <li> absolute angle 180 to 270 (quadrant 3) or
* <li> absolute angle 270 to 0 (quadrant 4)
* </ul>
*
* @param aGbrItem is the GBRITEM to fill in.
* @param Dcode_index is the DCODE value, like D14.
* @param aStart is the starting point.
* @param aEnd is the ending point.
* @param aRelCenter is the center coordinate relative to start point,
* given in ABSOLUTE VALUE and the sign of values x et y de rel_center
* must be calculated from the previously given constraint: arc only in the same quadrant.
* @param aClockwise true if arc must be created clockwise
* @param aPenSize The size of the flash. Note rectangular shapes are legal.
* @param aMultiquadrant set to true to create arcs up to 360 degrees,
* false when arc is inside one quadrant
* @param aLayerNegative set to true if the current layer is negative.
*/
void fillArcGBRITEM( GERBER_DRAW_ITEM* aGbrItem, int Dcode_index, const VECTOR2I& aStart,
const VECTOR2I& aEnd, const VECTOR2I& aRelCenter, VECTOR2I aPenSize,
bool aClockwise, bool aMultiquadrant, bool aLayerNegative )
{
VECTOR2I center, delta;
aGbrItem->m_ShapeType = GBR_ARC;
aGbrItem->m_Size = aPenSize;
aGbrItem->m_Flashed = false;
if( aGbrItem->m_GerberImageFile )
aGbrItem->SetNetAttributes( aGbrItem->m_GerberImageFile->m_NetAttributeDict );
if( aMultiquadrant )
{
center = aStart + aRelCenter;
}
else
{
// in single quadrant mode the relative coordinate aRelCenter is always >= 0
// So we must recalculate the actual sign of aRelCenter.x and aRelCenter.y
center = aRelCenter;
// calculate arc end coordinate relative to the starting point,
// because center is relative to the center point
delta = aEnd - aStart;
// now calculate the relative to aStart center position, for a draw function
// that use trigonometric arc angle (or counter-clockwise)
/* Quadrants:
* Y
* 2 | 1
* -------X
* 3 | 4
* C = actual relative arc center, S = arc start (axis origin) E = relative arc end
*/
if( (delta.x >= 0) && (delta.y >= 0) )
{
/* Quadrant 1 (trigo or cclockwise):
* C | E
* ---S---
* 3 | 4
*/
center.x = -center.x;
}
else if( (delta.x >= 0) && (delta.y < 0) )
{
/* Quadrant 4 (trigo or cclockwise):
* 2 | C
* ---S---
* 3 | E
*/
// Nothing to do
}
else if( (delta.x < 0) && (delta.y >= 0) )
{
/* Quadrant 2 (trigo or cclockwise):
* E | 1
* ---S---
* C | 4
*/
center.x = -center.x;
center.y = -center.y;
}
else
{
/* Quadrant 3 (trigo or cclockwise):
* 2 | 1
* ---S---
* E | C
*/
center.y = -center.y;
}
// Due to your draw arc function, we need this:
if( !aClockwise )
center = - center;
// Calculate actual arc center coordinate:
center += aStart;
}
if( aClockwise )
{
aGbrItem->m_Start = aStart;
aGbrItem->m_End = aEnd;
}
else
{
aGbrItem->m_Start = aEnd;
aGbrItem->m_End = aStart;
}
aGbrItem->m_ArcCentre = center;
aGbrItem->m_DCode = Dcode_index;
aGbrItem->SetLayerPolarity( aLayerNegative );
}
/**
* Create an arc G code when found in polygon outlines.
*
* If multiquadrant == true : arc can be 0 to 360 degrees and \a rel_center is the center
* coordinate relative to start point. If not multiquadrant, the arc can be only 0 to 90 deg,
* and only in the same quadrant:
*
* <ul>
* <li> absolute angle 0 to 90 (quadrant 1) or
* <li> absolute angle 90 to 180 (quadrant 2) or
* <li> absolute angle 180 to 270 (quadrant 3) or
* <li> absolute angle 270 to 0 (quadrant 4)
* </ul>
*
* @param aGbrItem is the GBRITEM to fill in.
* @param aStart is the starting point.
* @param aEnd is the ending point.
* @param rel_center is the center coordinate relative to start point,
* given in ABSOLUTE VALUE and the sign of values x et y de rel_center
* must be calculated from the previously given constraint: arc only in the
* same quadrant.
* @param aClockwise true if arc must be created clockwise
* @param aMultiquadrant set to true to create arcs up to 360 deg or
* false when arc is inside one quadrant
* @param aLayerNegative set to true if the current layer is negative
*/
static void fillArcPOLY( GERBER_DRAW_ITEM* aGbrItem, const VECTOR2I& aStart, const VECTOR2I& aEnd,
const VECTOR2I& rel_center, bool aClockwise, bool aMultiquadrant,
bool aLayerNegative )
{
/* in order to calculate arc parameters, we use fillArcGBRITEM
* so we muse create a dummy track and use its geometric parameters
*/
static GERBER_DRAW_ITEM dummyGbrItem( nullptr );
aGbrItem->SetLayerPolarity( aLayerNegative );
fillArcGBRITEM( &dummyGbrItem, 0, aStart, aEnd, rel_center, VECTOR2I( 0, 0 ),
aClockwise, aMultiquadrant, aLayerNegative );
aGbrItem->SetNetAttributes( aGbrItem->m_GerberImageFile->m_NetAttributeDict );
VECTOR2I center;
center = dummyGbrItem.m_ArcCentre;
// Calculate coordinates relative to arc center;
VECTOR2I start = dummyGbrItem.m_Start - center;
VECTOR2I end = dummyGbrItem.m_End - center;
/* Calculate angle arc
* angle is trigonometrical (counter-clockwise),
* and axis is the X,Y gerber coordinates
*/
EDA_ANGLE start_angle( start );
EDA_ANGLE end_angle( end );
// dummyTrack has right geometric parameters, but
// fillArcGBRITEM calculates arc parameters for a draw function that expects
// start_angle < end_angle. So ensure this is the case here:
// Due to the fact atan2 returns angles between -180 to + 180 degrees,
// this is not always the case ( a modulo 360.0 degrees can be lost )
//
// Note also an arc with same start and end angle is a circle (360 deg arc)
// in gerber files
if( start_angle >= end_angle )
end_angle += ANGLE_360;
EDA_ANGLE arc_angle = start_angle - end_angle;
// Approximate arc by 36 segments per 360 degree
EDA_ANGLE increment_angle = ANGLE_360 / 36;
int count = std::abs( arc_angle.AsDegrees() / increment_angle.AsDegrees() );
if( aGbrItem->m_ShapeAsPolygon.OutlineCount() == 0 )
aGbrItem->m_ShapeAsPolygon.NewOutline();
// calculate polygon corners
// when arc is counter-clockwise, dummyGbrItem arc goes from end to start
// and we must always create a polygon from start to end.
for( int ii = 0; ii <= count; ii++ )
{
EDA_ANGLE rot;
VECTOR2I end_arc = start;
if( aClockwise )
rot = increment_angle * ii;
else
rot = increment_angle * ( count - ii );
if( ii < count )
RotatePoint( end_arc, -rot );
else // last point
end_arc = aClockwise ? end : start;
aGbrItem->m_ShapeAsPolygon.Append( end_arc + center );
}
}
int GERBER_FILE_IMAGE::CodeNumber( char*& aText )
{
int retval;
char* endptr;
errno = 0;
retval = strtol( aText + 1, &endptr, 10 );
if( endptr == aText || errno != 0 )
return 0;
wxCHECK_MSG( retval < std::numeric_limits<int>::max(), 0, _( "Invalid Code Number" ) );
aText = endptr;
return static_cast<int>( retval );
}
bool GERBER_FILE_IMAGE::Execute_G_Command( char*& text, int G_command )
{
switch( G_command )
{
case GC_PHOTO_MODE: // can starts a D03 flash command: redundant, can be safely ignored.
break;
case GC_LINEAR_INTERPOL_1X:
m_Iterpolation = GERB_INTERPOL_LINEAR_1X;
break;
case GC_CIRCLE_NEG_INTERPOL:
m_Iterpolation = GERB_INTERPOL_ARC_NEG;
break;
case GC_CIRCLE_POS_INTERPOL:
m_Iterpolation = GERB_INTERPOL_ARC_POS;
break;
case GC_COMMENT:
// Skip comment, but only if the line does not start by "G04 #@! "
// which is a metadata, i.e. a X2 command inside the comment.
// this comment is called a "structured comment"
if( strncmp( text, " #@! ", 5 ) == 0 )
{
text += 5;
// The string starting at text is the same as the X2 attribute,
// but a X2 attribute ends by '%'. So we build the X2 attribute string
std::string x2buf;
while( *text && (*text != '*') )
{
x2buf += *text;
text++;
}
// add the end of X2 attribute string
x2buf += "*%";
x2buf += '\0';
char* cptr = (char*)x2buf.data();
int code_command = ReadXCommandID( cptr );
ExecuteRS274XCommand( code_command, nullptr, 0, cptr );
}
GetEndOfBlock( m_LineBuffer, GERBER_BUFZ, text, m_Current_File );
break;
case GC_SELECT_TOOL:
{
int D_commande = CodeNumber( text );
if( D_commande < FIRST_DCODE )
return false;
if( D_commande > (TOOLS_MAX_COUNT - 1) )
D_commande = TOOLS_MAX_COUNT - 1;
m_Current_Tool = D_commande;
D_CODE* pt_Dcode = GetDCODE( D_commande );
if( pt_Dcode )
pt_Dcode->m_InUse = true;
break;
}
case GC_SPECIFY_INCHES:
m_GerbMetric = false; // false = Inches, true = metric
break;
case GC_SPECIFY_MILLIMETERS:
m_GerbMetric = true; // false = Inches, true = metric
break;
case GC_TURN_OFF_360_INTERPOL: // disable Multi cadran arc and Arc interpol
m_360Arc_enbl = false;
m_Iterpolation = GERB_INTERPOL_LINEAR_1X; // not sure it should be done
m_AsArcG74G75Cmd = true;
break;
case GC_TURN_ON_360_INTERPOL:
m_360Arc_enbl = true;
m_AsArcG74G75Cmd = true;
break;
case GC_SPECIFY_ABSOLUES_COORD:
m_Relative = false; // false = absolute Coord, true = relative
// Coord
break;
case GC_SPECIFY_RELATIVEES_COORD:
m_Relative = true; // false = absolute Coord, true = relative
// Coord
break;
case GC_TURN_ON_POLY_FILL:
m_PolygonFillMode = true;
m_Exposure = false;
break;
case GC_TURN_OFF_POLY_FILL:
if( m_Exposure && GetLastItemInList() ) // End of polygon
{
GERBER_DRAW_ITEM * gbritem = GetLastItemInList();
if( gbritem->m_ShapeAsPolygon.VertexCount() )
gbritem->m_ShapeAsPolygon.Append( gbritem->m_ShapeAsPolygon.CVertex( 0 ) );
StepAndRepeatItem( *gbritem );
}
m_Exposure = false;
m_PolygonFillMode = false;
m_PolygonFillModeState = 0;
m_Iterpolation = GERB_INTERPOL_LINEAR_1X; // not sure it should be done
break;
case GC_MOVE: // Non existent
default:
{
wxString msg;
msg.Printf( wxT( "G%0.2d command not handled" ), G_command );
AddMessageToList( msg );
return false;
}
}
return true;
}
bool GERBER_FILE_IMAGE::Execute_DCODE_Command( char*& text, int D_commande )
{
VECTOR2I size( 15, 15 );
APERTURE_T aperture = APT_CIRCLE;
GERBER_DRAW_ITEM* gbritem;
int dcode = 0;
D_CODE* tool = nullptr;
wxString msg;
if( D_commande >= FIRST_DCODE ) // This is a "Set tool" command
{
if( D_commande > (TOOLS_MAX_COUNT - 1) )
D_commande = TOOLS_MAX_COUNT - 1;
// remember which tool is selected, nothing is done with it in this
// call
m_Current_Tool = D_commande;
D_CODE* pt_Dcode = GetDCODE( D_commande );
if( pt_Dcode )
pt_Dcode->m_InUse = true;
else
m_Has_MissingDCode = true;
return true;
}
else // D_commande = 0..9: this is a pen command (usually D1, D2 or D3)
{
m_Last_Pen_Command = D_commande;
}
if( m_PolygonFillMode ) // Enter a polygon description:
{
switch( D_commande )
{
case 1: // code D01 Draw line, exposure ON
if( !m_Exposure ) // Start a new polygon outline:
{
m_Exposure = true;
gbritem = new GERBER_DRAW_ITEM( this );
AddItemToList( gbritem );
gbritem->m_ShapeType = GBR_POLYGON;
gbritem->m_Flashed = false;
gbritem->m_DCode = 0; // No DCode for a Polygon (Region in Gerber dialect)
if( gbritem->m_GerberImageFile )
{
gbritem->SetNetAttributes( gbritem->m_GerberImageFile->m_NetAttributeDict );
gbritem->m_AperFunction = gbritem->m_GerberImageFile->m_AperFunction;
}
}
switch( m_Iterpolation )
{
case GERB_INTERPOL_ARC_NEG:
case GERB_INTERPOL_ARC_POS:
// Before any arc command, a G74 or G75 command must be set.
// Otherwise the Gerber file is invalid
if( !m_AsArcG74G75Cmd )
{
AddMessageToList( _( "Invalid Gerber file: missing G74 or G75 arc command" ) );
// Disable further warning messages:
m_AsArcG74G75Cmd = true;
}
gbritem = GetLastItemInList();
fillArcPOLY( gbritem, m_PreviousPos,
m_CurrentPos, m_IJPos,
( m_Iterpolation == GERB_INTERPOL_ARC_NEG ) ? false : true,
m_360Arc_enbl, GetLayerParams().m_LayerNegative );
break;
default:
gbritem = GetLastItemInList();
gbritem->m_Start = m_PreviousPos; // m_Start is used as temporary storage
if( gbritem->m_ShapeAsPolygon.OutlineCount() == 0 )
{
gbritem->m_ShapeAsPolygon.NewOutline();
gbritem->m_ShapeAsPolygon.Append( VECTOR2I( gbritem->m_Start ) );
}
gbritem->m_End = m_CurrentPos; // m_End is used as temporary storage
gbritem->m_ShapeAsPolygon.Append( VECTOR2I( gbritem->m_End ) );
break;
}
m_PreviousPos = m_CurrentPos;
m_PolygonFillModeState = 1;
break;
case 2: // code D2: exposure OFF (i.e. "move to")
if( m_Exposure && GetLastItemInList() ) // End of polygon
{
gbritem = GetLastItemInList();
gbritem->m_ShapeAsPolygon.Append( gbritem->m_ShapeAsPolygon.CVertex( 0 ) );
StepAndRepeatItem( *gbritem );
}
m_Exposure = false;
m_PreviousPos = m_CurrentPos;
m_PolygonFillModeState = 0;
break;
default:
return false;
}
}
else
{
switch( D_commande )
{
case 1: // code D01 Draw line, exposure ON
m_Exposure = true;
tool = GetDCODE( m_Current_Tool );
if( tool )
{
size = tool->m_Size;
dcode = tool->m_Num_Dcode;
aperture = tool->m_ApertType;
}
switch( m_Iterpolation )
{
case GERB_INTERPOL_LINEAR_1X:
gbritem = new GERBER_DRAW_ITEM( this );
AddItemToList( gbritem );
fillLineGBRITEM( gbritem, dcode, m_PreviousPos,
m_CurrentPos, size, GetLayerParams().m_LayerNegative );
StepAndRepeatItem( *gbritem );
break;
case GERB_INTERPOL_ARC_NEG:
case GERB_INTERPOL_ARC_POS:
gbritem = new GERBER_DRAW_ITEM( this );
AddItemToList( gbritem );
if( m_LastCoordIsIJPos )
{
fillArcGBRITEM( gbritem, dcode, m_PreviousPos,
m_CurrentPos, m_IJPos, size,
( m_Iterpolation == GERB_INTERPOL_ARC_NEG ) ?
false : true, m_360Arc_enbl, GetLayerParams().m_LayerNegative );
m_LastCoordIsIJPos = false;
}
else
{
fillLineGBRITEM( gbritem, dcode, m_PreviousPos,
m_CurrentPos, size, GetLayerParams().m_LayerNegative );
}
StepAndRepeatItem( *gbritem );
break;
default:
msg.Printf( wxT( "RS274D: DCODE Command: interpol error (type %X)" ),
m_Iterpolation );
AddMessageToList( msg );
break;
}
m_PreviousPos = m_CurrentPos;
break;
case 2: // code D2: exposure OFF (i.e. "move to")
m_Exposure = false;
m_PreviousPos = m_CurrentPos;
break;
case 3: // code D3: flash aperture
tool = GetDCODE( m_Current_Tool );
if( tool )
{
size = tool->m_Size;
dcode = tool->m_Num_Dcode;
aperture = tool->m_ApertType;
}
gbritem = new GERBER_DRAW_ITEM( this );
AddItemToList( gbritem );
fillFlashedGBRITEM( gbritem, aperture, dcode, m_CurrentPos,
size, GetLayerParams().m_LayerNegative );
StepAndRepeatItem( *gbritem );
m_PreviousPos = m_CurrentPos;
break;
default:
return false;
}
}
return true;
}
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