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kicad-source/common/common_plotGERBER_functions.cpp
Marco Mattila 9dc9cc1f78 Board manufacturers typically do not print silkscreen on areas without 
soldermask. Nevertheless, it would be nice to have proper gerbers to
begin with, i.e., gerbers with no silkscreen in soldermaskless areas.
Of course, most of the problem can be taken care of by drawing the
footprints properly. However, sometimes the silkscreen of one
footprint ends up on the pads of another one (think components under a
so-dimm card, for example). The attached patch adds an option to
subtract the soldermask from the silkscreen when doing gerber output.

marco
2010-12-06 16:05:12 -06:00

515 lines
14 KiB
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/******************************************/
/* Kicad: Common plot GERBER Routines */
/******************************************/
#include "fctsys.h"
#include "gr_basic.h"
#include "trigo.h"
#include "wxstruct.h"
#include "base_struct.h"
#include "common.h"
#include "plot_common.h"
#include "macros.h"
#include "kicad_string.h"
#include "build_version.h"
/**
* Function set_viewport
* Set the plot offset for the current plotting
* @param aOffset = plot offset
* @param aScale = coordinate scale (scale coefficient for coordinates)
*/
void GERBER_PLOTTER::set_viewport( wxPoint offset,
double aScale, int orient )
{
wxASSERT( !output_file );
wxASSERT( orient == 0 );
plot_orient_options = 0;
plot_offset = offset;
wxASSERT( aScale == 1 );
plot_scale = 1;
device_scale = 1;
set_default_line_width( 100 ); /* line thickness in 1 / 1000 inch */
}
/**
* Function start_plot
* Write GERBER header to file
* initialize global variable g_Plot_PlotOutputFile
* @param aFile: an opened file to write to
*/
bool GERBER_PLOTTER::start_plot( FILE* aFile )
{
char Line[1024];
wxASSERT( !output_file );
final_file = aFile;
// Create a temporary filename to store gerber file
// note tmpfile() does not work under Vista and W7 un user mode
m_workFilename = filename + wxT(".tmp");
work_file = wxFopen( m_workFilename, wxT( "wt" ));
output_file = work_file;
wxASSERT( output_file );
if( output_file == NULL )
return false;
DateAndTime( Line );
wxString Title = creator + wxT( " " ) + GetBuildVersion();
fprintf( output_file, "G04 (created by %s) date %s*\n",
CONV_TO_UTF8( Title ), Line );
// Specify linear interpol (G01), unit = INCH (G70), abs format (G90):
fputs( "G01*\nG70*\nG90*\n", output_file );
fputs( "%MOIN*%\n", output_file ); // set unites = INCHES
/* Set gerber format to 3.4 */
fputs( "G04 Gerber Fmt 3.4, Leading zero omitted, Abs format*\n%FSLAX34Y34*%\n",
output_file );
fputs( "G04 APERTURE LIST*\n", output_file );
/* Select the default aperture */
set_current_line_width( -1 );
return true;
}
bool GERBER_PLOTTER::end_plot()
{
char line[1024];
wxString msg;
wxASSERT( output_file );
/* Outfile is actually a temporary file! */
fputs( "M02*\n", output_file );
fflush( output_file );
// rewind( work_file ); // work_file == output_file !!!
fclose( work_file );
work_file = wxFopen( m_workFilename, wxT( "rt" ));
wxASSERT( work_file );
output_file = final_file;
// Placement of apertures in RS274X
while( fgets( line, 1024, work_file ) )
{
fputs( line, output_file );
if( strcmp( strtok( line, "\n\r" ), "G04 APERTURE LIST*" ) == 0 )
{
write_aperture_list();
fputs( "G04 APERTURE END LIST*\n", output_file );
}
}
fclose( work_file );
fclose( final_file );
::wxRemoveFile( m_workFilename );
output_file = 0;
return true;
}
/* Set the default line width (in 1/1000 inch) for the current plotting
*/
void GERBER_PLOTTER::set_default_line_width( int width )
{
default_pen_width = width;
current_aperture = apertures.end();
}
/* Set the Current line width (in 1/1000 inch) for the next plot
*/
void GERBER_PLOTTER::set_current_line_width( int width )
{
int pen_width;
if( width > 0 )
pen_width = width;
else
pen_width = default_pen_width;
select_aperture( wxSize( pen_width, pen_width ), APERTURE::Plotting );
current_pen_width = pen_width;
}
std::vector<APERTURE>::iterator GERBER_PLOTTER::get_aperture( const wxSize& size,
APERTURE::Aperture_Type type )
{
int last_D_code = 9;
// Search an existing aperture
std::vector<APERTURE>::iterator tool = apertures.begin();
while( tool != apertures.end() )
{
last_D_code = tool->D_code;
if( (tool->type == type)
&& (tool->size == size) )
return tool;
tool++;
}
// Allocate a new aperture
APERTURE new_tool;
new_tool.size = size;
new_tool.type = type;
new_tool.D_code = last_D_code + 1;
apertures.push_back( new_tool );
return apertures.end() - 1;
}
void GERBER_PLOTTER::select_aperture( const wxSize& size,
APERTURE::Aperture_Type type )
{
wxASSERT( output_file );
if( ( current_aperture == apertures.end() )
|| ( current_aperture->type != type )
|| ( current_aperture->size != size ) )
{
/* Pick an existing aperture or create a new one */
current_aperture = get_aperture( size, type );
fprintf( output_file, "G54D%d*\n", current_aperture->D_code );
}
}
/*Generate list of D_CODES.
* Returns the number of D_Codes generated in RS274X format.
*/
void GERBER_PLOTTER::write_aperture_list()
{
wxASSERT( output_file );
char cbuf[1024];
/* Init : */
for( std::vector<APERTURE>::iterator tool = apertures.begin();
tool != apertures.end(); tool++ )
{
const float fscale = 0.0001f * plot_scale; // For 3.4 format
char* text;
text = cbuf + sprintf( cbuf, "%%ADD%d", tool->D_code );
switch( tool->type )
{
case APERTURE::Circle:
sprintf( text, "C,%f*%%\n", tool->size.x * fscale );
break;
case APERTURE::Rect:
sprintf( text, "R,%fX%f*%%\n", tool->size.x * fscale,
tool->size.y * fscale );
break;
case APERTURE::Plotting:
sprintf( text, "C,%f*%%\n", tool->size.x * fscale );
break;
case APERTURE::Oval:
sprintf( text, "O,%fX%f*%%\n", tool->size.x * fscale,
tool->size.y * fscale );
break;
}
fputs( cbuf, output_file );
}
}
void GERBER_PLOTTER::pen_to( wxPoint aPos, char plume )
{
wxASSERT( output_file );
user_to_device_coordinates( aPos );
switch( plume )
{
case 'Z':
break;
case 'U':
fprintf( output_file, "X%5.5dY%5.5dD02*\n", aPos.x, aPos.y );
break;
case 'D':
fprintf( output_file, "X%5.5dY%5.5dD01*\n", aPos.x, aPos.y );
}
pen_state = plume;
}
void GERBER_PLOTTER::rect( wxPoint p1, wxPoint p2, FILL_T fill, int width )
{
wxASSERT( output_file );
int coord[10] =
{
p1.x, p1.y,
p1.x, p2.y,
p2.x, p2.y,
p2.x, p1.y,
p1.x, p1.y
};
poly( 5, coord, fill, width );
}
/**
* Function circle
* writes a non filled circle to output file
* Plot one circle as segments (6 to 16 depending on its radius
* @param aCentre = center coordinates
* @param aDiameter = diameter of the circle
* @param aWidth = line width
*/
void GERBER_PLOTTER::circle( wxPoint aCentre, int aDiameter, FILL_T fill,
int aWidth )
{
wxASSERT( output_file );
wxPoint start, end;
double radius = aDiameter / 2;
const int delta = 3600 / 32; /* increment (in 0.1 degrees) to draw
* circles */
start.x = aCentre.x + wxRound( radius );
start.y = aCentre.y;
set_current_line_width( aWidth );
move_to( start );
for( int ii = delta; ii < 3600; ii += delta )
{
end.x = aCentre.x + (int) ( radius * fcosinus[ii] );
end.y = aCentre.y + (int) ( radius * fsinus[ii] );
line_to( end );
}
finish_to( start );
}
/**
* Function PlotFilledPolygon_GERBER
* writes a filled polyline to output file
* @param aCornersCount = number of corners
* @param aCoord = buffer of corners coordinates
* @param aFill = plot option (NO_FILL, FILLED_SHAPE, FILLED_WITH_BG_BODYCOLOR)
* @param aCoord = buffer of corners coordinates
*/
void GERBER_PLOTTER::poly( int aCornersCount, int* aCoord, FILL_T aFill,
int aWidth )
{
wxASSERT( output_file );
wxPoint pos, startpos;
set_current_line_width( aWidth );
if( aFill )
fputs( "G36*\n", output_file );
startpos.x = *aCoord++;
startpos.y = *aCoord++;
move_to( startpos );
for( int ii = 1; ii < aCornersCount; ii++ )
{
pos.x = *aCoord++;
pos.y = *aCoord++;
line_to( pos );
}
if( aFill )
{
finish_to( startpos );
fputs( "G37*\n", output_file );
}
else
{
pen_finish();
}
}
/* Function flash_pad_circle
* Plot a circular pad or via at the user position pos
*/
void GERBER_PLOTTER::flash_pad_circle( wxPoint pos, int diametre,
GRTraceMode trace_mode )
{
wxASSERT( output_file );
wxSize size( diametre, diametre );
switch( trace_mode )
{
case FILAIRE:
case SKETCH:
set_current_line_width( -1 );
circle( pos, diametre - current_pen_width, NO_FILL );
break;
case FILLED:
user_to_device_coordinates( pos );
select_aperture( size, APERTURE::Circle );
fprintf( output_file, "X%5.5dY%5.5dD03*\n", pos.x, pos.y );
break;
}
}
/* Plot oval pad at position pos:
* Dimensions dx, dy,
* Orient Orient
* For a vertical or horizontal orientation, the shape is flashed
* For any orientation the shape is drawn as a segment
*/
void GERBER_PLOTTER::flash_pad_oval( wxPoint pos, wxSize size, int orient,
GRTraceMode trace_mode )
{
wxASSERT( output_file );
int x0, y0, x1, y1, delta;
/* Plot a flashed shape. */
if( ( orient == 0 || orient == 900 || orient == 1800 || orient == 2700 )
&& trace_mode == FILLED )
{
if( orient == 900 || orient == 2700 ) /* orientation turned 90 deg. */
EXCHG( size.x, size.y );
user_to_device_coordinates( pos );
select_aperture( size, APERTURE::Oval );
fprintf( output_file, "X%5.5dY%5.5dD03*\n", pos.x, pos.y );
}
else /* Plot pad as a segment. */
{
if( size.x > size.y )
{
EXCHG( size.x, size.y );
if( orient < 2700 )
orient += 900;
else
orient -= 2700;
}
if( trace_mode == FILLED )
{
/* The pad is reduced to an oval with dy > dx */
delta = size.y - size.x;
x0 = 0;
y0 = -delta / 2;
x1 = 0;
y1 = delta / 2;
RotatePoint( &x0, &y0, orient );
RotatePoint( &x1, &y1, orient );
thick_segment( wxPoint( pos.x + x0, pos.y + y0 ),
wxPoint( pos.x + x1, pos.y + y1 ),
size.x, trace_mode );
}
else
sketch_oval( pos, size, orient, -1 );
}
}
/* Plot rectangular pad.
* Gives its center, size, and orientation
* For a vertical or horizontal shape, the shape is an aperture (Dcode) and
* it is flashed.
* For others shape the direction is plotted as a polygon.
*/
void GERBER_PLOTTER::flash_pad_rect( wxPoint pos, wxSize size,
int orient, GRTraceMode trace_mode )
{
wxASSERT( output_file );
/* Plot as flashed. */
switch( orient )
{
case 900:
case 2700: /* rotation of 90 degrees or 270 returns dimensions */
EXCHG( size.x, size.y );
// Pass through
case 0:
case 1800:
switch( trace_mode )
{
case FILAIRE:
case SKETCH:
set_current_line_width( -1 );
rect( wxPoint( pos.x - (size.x - current_pen_width) / 2,
pos.y - (size.y - current_pen_width) / 2 ),
wxPoint( pos.x + (size.x - current_pen_width) / 2,
pos.y + (size.y - current_pen_width) / 2 ),
NO_FILL );
break;
case FILLED:
user_to_device_coordinates( pos );
select_aperture( size, APERTURE::Rect );
fprintf( output_file, "X%5.5dY%5.5dD03*\n", pos.x, pos.y );
break;
}
break;
default: /* plot pad shape as polygon */
{
wxPoint coord[4];
// coord[0] is assumed the lower left
// coord[1] is assumed the upper left
// coord[2] is assumed the upper right
// coord[3] is assumed the lower right
/* Trace the outline. */
coord[0].x = -size.x/2; // lower left
coord[0].y = size.y/2;
coord[1].x = -size.x/2; // upper left
coord[1].y = -size.y/2;
coord[2].x = size.x/2; // upper right
coord[2].y = -size.y/2;
coord[3].x = size.x/2; //lower right
coord[3].y = size.y/2;
flash_pad_trapez( pos, coord, orient, trace_mode );
}
break;
}
}
/* Plot trapezoidal pad.
* aPadPos is pad position, aCorners the corners positions of the basic shape
* Orientation aPadOrient in 0.1 degrees
* Plot mode = FILLED or SKETCH
*/
void GERBER_PLOTTER::flash_pad_trapez( wxPoint aPadPos, wxPoint aCorners[4],
int aPadOrient, GRTraceMode aTrace_Mode )
{
wxPoint polygon[5]; // polygon corners list
for( int ii = 0; ii < 4; ii++ )
polygon[ii] = aCorners[ii];
/* Draw the polygon and fill the interior as required. */
for( int ii = 0; ii < 4; ii++ )
{
RotatePoint( &polygon[ii], aPadOrient );
polygon[ii] += aPadPos;
}
// Close the polygon
polygon[4] = polygon[0];
set_current_line_width( -1 );
poly( 5, &polygon[0].x, aTrace_Mode==FILLED ? FILLED_SHAPE : NO_FILL );
}
void GERBER_PLOTTER::SetLayerPolarity( bool aPositive )
{
if( aPositive )
fprintf( output_file, "%%LPD*%%\n" );
else
fprintf( output_file, "%%LPC*%%\n" );
}
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