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/* GNUPLOT - graphics.c */
/*[
* Copyright 1986 - 1993, 1998, 2004 Thomas Williams, Colin Kelley
*
* Permission to use, copy, and distribute this software and its
* documentation for any purpose with or without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.
*
* Permission to modify the software is granted, but not the right to
* distribute the complete modified source code. Modifications are to
* be distributed as patches to the released version. Permission to
* distribute binaries produced by compiling modified sources is granted,
* provided you
* 1. distribute the corresponding source modifications from the
* released version in the form of a patch file along with the binaries,
* 2. add special version identification to distinguish your version
* in addition to the base release version number,
* 3. provide your name and address as the primary contact for the
* support of your modified version, and
* 4. retain our contact information in regard to use of the base
* software.
* Permission to distribute the released version of the source code along
* with corresponding source modifications in the form of a patch file is
* granted with same provisions 2 through 4 for binary distributions.
*
* This software is provided "as is" without express or implied warranty
* to the extent permitted by applicable law.
]*/
/* Daniel Sebald: added plot_image_or_update_axes() routine for images.
* (5 November 2003)
*/
#include "graphics.h"
#include "boundary.h"
#include "color.h"
#include "pm3d.h"
#include "plot.h"
#include "alloc.h"
#include "axis.h"
#include "command.h"
#include "misc.h"
#include "gp_time.h"
#include "gadgets.h"
#include "jitter.h"
#include "plot2d.h" /* for boxwidth */
#include "term_api.h"
#include "util.h"
#include "util3d.h"
/* Externally visible/modifiable status variables */
/* 'set offset' --- artificial buffer zone between coordinate axes and
* the area actually covered by the data.
* The retain_offsets flag is an interlock to prevent repeated application
* of the offsets when a plot is refreshed or scrolled.
*/
t_position loff = {first_axes, first_axes, first_axes, 0.0, 0.0, 0.0};
t_position roff = {first_axes, first_axes, first_axes, 0.0, 0.0, 0.0};
t_position toff = {first_axes, first_axes, first_axes, 0.0, 0.0, 0.0};
t_position boff = {first_axes, first_axes, first_axes, 0.0, 0.0, 0.0};
TBOOLEAN retain_offsets = FALSE;
/* set bars */
double bar_size = 1.0;
int bar_layer = LAYER_FRONT;
struct lp_style_type bar_lp;
/* 'set rgbmax {0|255}' */
double rgbmax = 255;
/* radius used to draw ttics and radial grid lines. */
/* NB: x-axis coordinates, not polar. updated by xtick2d_callback. */
static double largest_polar_circle;
/* End points and tickmark offsets for radial axes in spiderplots */
static double spoke_x0, spoke_y0, spoke_x1, spoke_y1;
static double spoke_dx, spoke_dy;
/*}}} */
/* Status information for stacked histogram plots */
static struct coordinate *stackheight = NULL; /* top of previous row */
static int stack_count; /* points actually used */
static void place_histogram_titles(void);
/*{{{ static fns and local macros */
static void adjust_offsets(void);
static void adjust_nonlinear_offset(struct axis *axis);
static void recheck_ranges(struct curve_points * plot);
static void plot_border(void);
static void plot_impulses(struct curve_points * plot, int yaxis_x, int xaxis_y);
static void plot_lines(struct curve_points * plot);
static void plot_points(struct curve_points * plot);
static void plot_dots(struct curve_points * plot);
static void plot_bars(struct curve_points * plot);
static void plot_boxes(struct curve_points * plot, int xaxis_y);
static void plot_filledcurves(struct curve_points * plot);
static void finish_filled_curve(int, gpiPoint *, struct curve_points *);
static void plot_betweencurves(struct curve_points * plot);
static void plot_vectors(struct curve_points * plot);
static void plot_f_bars(struct curve_points * plot);
static void plot_c_bars(struct curve_points * plot);
static int compare_ypoints(SORTFUNC_ARGS arg1, SORTFUNC_ARGS arg2);
static void plot_boxplot(struct curve_points * plot, TBOOLEAN only_autoscale);
static void place_labels(struct text_label * listhead, int layer, TBOOLEAN clip);
static void place_arrows(int layer);
static void place_grid(int layer);
static void place_raxis(void);
static void place_parallel_axes(struct curve_points *plots, int layer);
static void place_spiderplot_axes(struct curve_points *plots, int layer);
static void plot_steps(struct curve_points * plot); /* JG */
static void plot_fsteps(struct curve_points * plot); /* HOE */
static void plot_histeps(struct curve_points * plot); /* CAC */
static void ytick2d_callback(struct axis *, double place, char *text, int ticlevel, struct lp_style_type grid, struct ticmark *userlabels);
static void xtick2d_callback(struct axis *, double place, char *text, int ticlevel, struct lp_style_type grid, struct ticmark *userlabels);
static void ttick_callback(struct axis *, double place, char *text, int ticlevel, struct lp_style_type grid, struct ticmark *userlabels);
static void spidertick_callback(struct axis *, double place, char *text, int ticlevel, struct lp_style_type grid, struct ticmark *userlabels);
static int histeps_compare(SORTFUNC_ARGS p1, SORTFUNC_ARGS p2);
static void get_arrow(struct arrow_def* arrow, double* sx, double* sy, double* ex, double* ey);
static void map_position_double(struct position* pos, double* x, double* y, const char* what);
static void plot_circles(struct curve_points *plot);
static void plot_ellipses(struct curve_points *plot);
static void do_rectangle(int dimensions, t_object *this_object, fill_style_type *fillstyle);
static void do_polygon(int dimensions, t_object *this_object, int style, int facing );
static double rgbscale(double rawvalue);
static void draw_polar_circle(double place);
static void plot_parallel(struct curve_points *plot);
static void plot_spiderplot(struct curve_points *plot);
/* for plotting error bars
* half the width of error bar tic mark
*/
#define ERRORBARTIC GPMAX((t->h_tic/2),1)
/* used by compare_ypoints via q_sort from filter_boxplot */
static TBOOLEAN boxplot_factor_sort_required;
/* For tracking exit and re-entry of bounding curves that extend out of plot */
/* these must match the bit values returned by clip_point(). */
#define LEFT_EDGE 1
#define RIGHT_EDGE 2
#define BOTTOM_EDGE 4
#define TOP_EDGE 8
#define f_max(a,b) GPMAX((a),(b))
#define f_min(a,b) GPMIN((a),(b))
/* True if a and b have the same sign or zero (positive or negative) */
#define samesign(a,b) ((sgn(a) * sgn(b)) >= 0)
/*}}} */
static void
get_arrow(
struct arrow_def *arrow,
double* sx, double* sy,
double* ex, double* ey)
{
map_position_double(&arrow->start, sx, sy, "arrow");
if (arrow->type == arrow_end_relative) {
/* different coordinate systems:
* add the values in the drivers coordinate system.
* For log scale: relative coordinate is factor */
map_position_r(&arrow->end, ex, ey, "arrow");
*ex += *sx;
*ey += *sy;
} else if (arrow->type == arrow_end_oriented) {
double aspect = (double)term->v_tic / (double)term->h_tic;
double radius;
#ifdef _WIN32
if (strcmp(term->name, "windows") == 0)
aspect = 1.;
#endif
map_position_r(&arrow->end, &radius, NULL, "arrow");
*ex = *sx + cos(DEG2RAD * arrow->angle) * radius;
*ey = *sy + sin(DEG2RAD * arrow->angle) * radius * aspect;
} else {
map_position_double(&arrow->end, ex, ey, "arrow");
}
}
static void
place_grid(int layer)
{
struct termentry *t = term;
int save_lgrid = grid_lp.l_type;
int save_mgrid = mgrid_lp.l_type;
BoundingBox *clip_save = clip_area;
term_apply_lp_properties(&border_lp); /* border linetype */
largest_polar_circle = 0;
/* We used to go through this process only once, drawing both the grid lines
* and the axis tic labels. Now we allow for a separate pass that redraws only
* the labels if the user has chosen "set tics front".
* This guarantees that the axis tic labels lie on top of all grid lines.
*/
if (layer == LAYER_FOREGROUND)
grid_lp.l_type = mgrid_lp.l_type = LT_NODRAW;
if (!grid_tics_in_front || (layer == LAYER_FOREGROUND)) {
/* select first mapping */
x_axis = FIRST_X_AXIS;
y_axis = FIRST_Y_AXIS;
/* label first y axis tics */
axis_output_tics(FIRST_Y_AXIS, &ytic_x, FIRST_X_AXIS, ytick2d_callback);
/* label first x axis tics */
axis_output_tics(FIRST_X_AXIS, &xtic_y, FIRST_Y_AXIS, xtick2d_callback);
/* select second mapping */
x_axis = SECOND_X_AXIS;
y_axis = SECOND_Y_AXIS;
axis_output_tics(SECOND_Y_AXIS, &y2tic_x, SECOND_X_AXIS, ytick2d_callback);
axis_output_tics(SECOND_X_AXIS, &x2tic_y, SECOND_Y_AXIS, xtick2d_callback);
}
/* select first mapping */
x_axis = FIRST_X_AXIS;
y_axis = FIRST_Y_AXIS;
/* Sep 2018: polar grid is clipped to x/y range limits */
clip_area = &plot_bounds;
/* POLAR GRID circles */
if (R_AXIS.ticmode && (raxis || polar)) {
/* Piggyback on the xtick2d_callback. Avoid a call to the full */
/* axis_output_tics(), which wasn't really designed for this axis. */
tic_start = map_y(0); /* Always equivalent to tics on theta=0 axis */
tic_mirror = tic_start; /* tic extends on both sides of theta=0 */
tic_text = tic_start - t->v_char;
rotate_tics = R_AXIS.tic_rotate;
if (rotate_tics == 0)
tic_hjust = CENTRE;
else if ((*t->text_angle)(rotate_tics))
tic_hjust = (rotate_tics == TEXT_VERTICAL) ? RIGHT : LEFT;
if (R_AXIS.manual_justify)
tic_hjust = R_AXIS.tic_pos;
tic_direction = 1;
gen_tics(&axis_array[POLAR_AXIS], xtick2d_callback);
(*t->text_angle) (0);
}
/* POLAR GRID radial lines */
if (polar_grid_angle > 0) {
double theta = 0;
int ox = map_x(0);
int oy = map_y(0);
term->layer(TERM_LAYER_BEGIN_GRID);
term_apply_lp_properties(&grid_lp);
if (largest_polar_circle <= 0)
largest_polar_circle = polar_radius(R_AXIS.max);
for (theta = 0; theta < 6.29; theta += polar_grid_angle) {
int x = map_x(largest_polar_circle * cos(theta));
int y = map_y(largest_polar_circle * sin(theta));
draw_clip_line(ox, oy, x, y);
}
term->layer(TERM_LAYER_END_GRID);
}
/* POLAR GRID tickmarks along the perimeter of the outer circle */
if (THETA_AXIS.ticmode) {
term_apply_lp_properties(&border_lp);
if (largest_polar_circle <= 0)
largest_polar_circle = polar_radius(R_AXIS.max);
copy_or_invent_formatstring(&THETA_AXIS);
gen_tics(&THETA_AXIS, ttick_callback);
term->text_angle(0);
}
/* Restore the grid line types if we had turned them off to draw labels only */
grid_lp.l_type = save_lgrid;
mgrid_lp.l_type = save_mgrid;
clip_area = clip_save;
}
static void
place_arrows(int layer)
{
struct arrow_def *this_arrow;
BoundingBox *clip_save = clip_area;
/* Allow arrows to run off the plot, so long as they are still on the canvas */
if (term->flags & TERM_CAN_CLIP)
clip_area = NULL;
else
clip_area = &canvas;
for (this_arrow = first_arrow;
this_arrow != NULL;
this_arrow = this_arrow->next) {
double dsx=0, dsy=0, dex=0, dey=0;
if (this_arrow->arrow_properties.layer != layer)
continue;
if (this_arrow->type == arrow_end_undefined)
continue;
get_arrow(this_arrow, &dsx, &dsy, &dex, &dey);
term_apply_lp_properties(&(this_arrow->arrow_properties.lp_properties));
apply_head_properties(&(this_arrow->arrow_properties));
draw_clip_arrow(dsx, dsy, dex, dey, this_arrow->arrow_properties.head);
}
term_apply_lp_properties(&border_lp);
clip_area = clip_save;
}
/*
* place_pixmaps() handles both 2D and 3D pixmaps
* NOTE: implemented via term->image(), not individual pixels
*/
void
place_pixmaps(int layer, int dimensions)
{
t_pixmap *pixmap;
gpiPoint corner[4];
int x, y, dx, dy;
if (!term->image)
return;
for (pixmap = pixmap_listhead; pixmap; pixmap = pixmap->next) {
if (layer != pixmap->layer)
continue;
/* ignore zero-size pixmap from read failure */
if (!pixmap->nrows || !pixmap->ncols)
continue;
/* Allow a single backing pixmap behind multiple multiplot panels */
if (layer == LAYER_BEHIND && multiplot_count > 1)
continue;
if (dimensions == 3)
map3d_position(&pixmap->pin, &x, &y, "pixmap");
else
map_position(&pixmap->pin, &x, &y, "pixmap");
/* dx = dy = 0 means 1-to-1 representation of pixels */
if (pixmap->extent.x == 0 && pixmap->extent.y == 0) {
dx = pixmap->ncols * term->tscale;
dy = pixmap->ncols * term->tscale;
} else if (dimensions == 3) {
map3d_position_r(&pixmap->extent, &dx, &dy, "pixmap");
if (pixmap->extent.scalex == first_axes)
dx = pixmap->extent.x * radius_scaler;
if (pixmap->extent.scaley == first_axes)
dy = pixmap->extent.y * radius_scaler;
} else {
double Dx, Dy;
map_position_r(&pixmap->extent, &Dx, &Dy, "pixmap");
dx = Dx;
dy = Dy;
}
/* default is to keep original aspect ratio */
if (pixmap->extent.y == 0)
dy = dx * (double)(pixmap->nrows) / (double)(pixmap->ncols);
if (pixmap->extent.x == 0)
dx = dy * (double)(pixmap->ncols) / (double)(pixmap->nrows);
if (pixmap->center) {
x -= dx/2;
y -= dy/2;
}
corner[0].x = x;
corner[0].y = y + dy;
corner[1].x = x + dx;
corner[1].y = y;
corner[2].x = 0; /* no clipping */
corner[2].y = term->ymax;
corner[3].x = term->xmax;
corner[3].y = 0;
term->image(pixmap->ncols, pixmap->nrows, pixmap->image_data, corner, IC_RGBA);
}
}
/*
* place_labels() handles both individual labels and 2D plot with labels
*/
static void
place_labels(struct text_label *listhead, int layer, TBOOLEAN clip)
{
struct text_label *this_label;
int x, y;
term->pointsize(pointsize);
/* Hypertext labels? */
/* NB: currently svg is the only terminal that needs this extra step */
if (layer == LAYER_PLOTLABELS && listhead && listhead->hypertext
&& term->hypertext) {
term->hypertext(TERM_HYPERTEXT_FONT, listhead->font);
}
for (this_label = listhead; this_label != NULL; this_label = this_label->next) {
if (this_label->layer != layer)
continue;
if (layer == LAYER_PLOTLABELS) {
x = map_x(this_label->place.x);
y = map_y(this_label->place.y);
} else
map_position(&this_label->place, &x, &y, "label");
/* Trap undefined values from e.g. nonlinear axis mapping */
if (invalid_coordinate(x,y))
continue;
if (clip) {
if (this_label->place.scalex == first_axes)
if (!(inrange(this_label->place.x, axis_array[FIRST_X_AXIS].min, axis_array[FIRST_X_AXIS].max)))
continue;
if (this_label->place.scalex == second_axes)
if (!(inrange(this_label->place.x, axis_array[SECOND_X_AXIS].min, axis_array[SECOND_X_AXIS].max)))
continue;
if (this_label->place.scaley == first_axes)
if (!(inrange(this_label->place.y, axis_array[FIRST_Y_AXIS].min, axis_array[FIRST_Y_AXIS].max)))
continue;
if (this_label->place.scaley == second_axes)
if (!(inrange(this_label->place.y, axis_array[SECOND_Y_AXIS].min, axis_array[SECOND_Y_AXIS].max)))
continue;
}
write_label(x, y, this_label);
}
}
void
place_objects(struct object *listhead, int layer, int dimensions)
{
t_object *this_object;
double x1, y1;
int style;
for (this_object = listhead; this_object != NULL; this_object = this_object->next) {
struct lp_style_type lpstyle;
struct fill_style_type *fillstyle;
if (this_object->layer != layer && this_object->layer != LAYER_FRONTBACK)
continue;
/* Extract line and fill style, but don't apply it yet */
lpstyle = this_object->lp_properties;
if (this_object->fillstyle.fillstyle == FS_DEFAULT
&& this_object->object_type == OBJ_RECTANGLE)
fillstyle = &default_rectangle.fillstyle;
else
fillstyle = &this_object->fillstyle;
style = style_from_fill(fillstyle);
term_apply_lp_properties(&lpstyle);
switch (this_object->object_type) {
case OBJ_CIRCLE:
{
t_circle *e = &this_object->o.circle;
double radius;
BoundingBox *clip_save = clip_area;
if (dimensions == 2) {
map_position_double(&e->center, &x1, &y1, "object");
map_position_r(&e->extent, &radius, NULL, "object");
} else if (splot_map) {
int junkw, junkh;
map3d_position_double(&e->center, &x1, &y1, "object");
map3d_position_r(&e->extent, &junkw, &junkh, "object");
radius = junkw;
} else /* General 3D splot */ {
if (e->center.scalex == screen)
map_position_double(&e->center, &x1, &y1, "object");
else if (e->center.scalex == first_axes || e->center.scalex == polar_axes)
map3d_position_double(&e->center, &x1, &y1, "object");
else
break;
/* radius must not change with rotation */
if (e->extent.scalex == first_axes) {
radius = e->extent.x * radius_scaler;
} else {
map_position_r(&e->extent, &radius, NULL, "object");
}
}
if ((e->center.scalex == screen || e->center.scaley == screen)
|| (this_object->clip == OBJ_NOCLIP))
clip_area = &canvas;
do_arc((int)x1, (int)y1, radius, e->arc_begin, e->arc_end, style, FALSE);
/* Retrace the border if the style requests it */
if (need_fill_border(fillstyle))
do_arc((int)x1, (int)y1, radius, e->arc_begin, e->arc_end, 0, e->wedge);
clip_area = clip_save;
break;
}
case OBJ_ELLIPSE:
{
t_ellipse *e = &this_object->o.ellipse;
BoundingBox *clip_save = clip_area;
if ((e->center.scalex == screen || e->center.scaley == screen)
|| (this_object->clip == OBJ_NOCLIP))
clip_area = &canvas;
if (dimensions == 2)
do_ellipse(2, e, style, TRUE);
else if (splot_map)
do_ellipse(3, e, style, TRUE);
else
break;
/* Retrace the border if the style requests it */
if (need_fill_border(fillstyle))
do_ellipse(dimensions, e, 0, TRUE);
clip_area = clip_save;
break;
}
case OBJ_POLYGON:
{
/* Polygons have an extra option LAYER_FRONTBACK that matches
* FRONT or BACK depending on which way the polygon faces
*/
int facing = LAYER_BEHIND; /* This will be ignored */
if (this_object->layer == LAYER_FRONTBACK) {
if ((layer == LAYER_FRONT) || (layer == LAYER_BACK))
facing = layer;
else
break;
}
do_polygon(dimensions, this_object, style, facing);
/* Retrace the border if the style requests it */
if (this_object->layer != LAYER_DEPTHORDER)
if (need_fill_border(fillstyle))
do_polygon(dimensions, this_object, 0, facing);
break;
}
case OBJ_RECTANGLE:
{
do_rectangle(dimensions, this_object, fillstyle);
break;
}
default:
break;
} /* End switch(object_type) */
}
}
/*
* Apply axis range expansions from "set offsets" command
*/
static void
adjust_offsets(void)
{
double b = boff.scaley == graph ? fabs(Y_AXIS.max - Y_AXIS.min)*boff.y : boff.y;
double t = toff.scaley == graph ? fabs(Y_AXIS.max - Y_AXIS.min)*toff.y : toff.y;
double l = loff.scalex == graph ? fabs(X_AXIS.max - X_AXIS.min)*loff.x : loff.x;
double r = roff.scalex == graph ? fabs(X_AXIS.max - X_AXIS.min)*roff.x : roff.x;
if (retain_offsets) {
retain_offsets = FALSE;
return;
}
if ((Y_AXIS.autoscale & AUTOSCALE_BOTH) != AUTOSCALE_NONE) {
if (nonlinear(&Y_AXIS)) {
adjust_nonlinear_offset(&Y_AXIS);
} else {
if (Y_AXIS.min < Y_AXIS.max) {
Y_AXIS.min -= b;
Y_AXIS.max += t;
} else {
Y_AXIS.max -= b;
Y_AXIS.min += t;
}
}
}
if ((X_AXIS.autoscale & AUTOSCALE_BOTH) != AUTOSCALE_NONE) {
if (nonlinear(&X_AXIS)) {
adjust_nonlinear_offset(&X_AXIS);
} else {
if (X_AXIS.min < X_AXIS.max) {
X_AXIS.min -= l;
X_AXIS.max += r;
} else {
X_AXIS.max -= l;
X_AXIS.min += r;
}
}
}
if (X_AXIS.min == X_AXIS.max)
int_error(NO_CARET, "x_min should not equal x_max!");
if (Y_AXIS.min == Y_AXIS.max)
int_error(NO_CARET, "y_min should not equal y_max!");
if (axis_array[FIRST_X_AXIS].linked_to_secondary)
clone_linked_axes(&axis_array[FIRST_X_AXIS], &axis_array[SECOND_X_AXIS]);
if (axis_array[FIRST_Y_AXIS].linked_to_secondary)
clone_linked_axes(&axis_array[FIRST_Y_AXIS], &axis_array[SECOND_Y_AXIS]);
}
/*
* This routine is called only if we know the axis passed in is either
* nonlinear X or nonlinear Y. We apply the offsets to the primary (linear)
* end of the linkage and then transform back to the axis itself (seconary).
*/
static void
adjust_nonlinear_offset( struct axis *secondary)
{
struct axis *primary = secondary->linked_to_primary;
double range = fabs(primary->max - primary->min);
double offset1, offset2;
if (secondary->index == FIRST_X_AXIS) {
if ((loff.scalex != graph && loff.x != 0)
|| (roff.scalex != graph && roff.x != 0))
int_error(NO_CARET, "nonlinear axis offsets must be in graph units");
offset1 = loff.x;
offset2 = roff.x;
} else {
if ((boff.scaley != graph && boff.y != 0)
|| (toff.scaley != graph && toff.y != 0))
int_error(NO_CARET, "nonlinear axis offsets must be in graph units");
offset1 = boff.y;
offset2 = toff.y;
}
primary->min -= range * offset1;
primary->max += range * offset2;
secondary->min = eval_link_function(secondary, primary->min);
secondary->max = eval_link_function(secondary, primary->max);
}
void
do_plot(struct curve_points *plots, int pcount)
{
struct termentry *t = term;
int curve;
struct curve_points *this_plot = NULL;
TBOOLEAN key_pass = FALSE;
legend_key *key = &keyT;
int previous_plot_style;
x_axis = FIRST_X_AXIS;
y_axis = FIRST_Y_AXIS;
adjust_offsets();
/* EAM June 2003 - Although the comment below implies that font dimensions
* are known after term_initialise(), this is not true at least for the X11
* driver. X11 fonts are not set until an actual display window is
* opened, and that happens in term->graphics(), which is called from
* term_start_plot().
*/
term_initialise(); /* may set xmax/ymax */
term_start_plot();
/* Figure out if we need a colorbox for this plot */
set_plot_with_palette(0, MODE_PLOT); /* EAM FIXME - 1st parameter is a dummy */
/* compute boundary for plot (plot_bounds.xleft, plot_bounds.xright, plot_bounds.ytop, plot_bounds.ybot)
* also calculates tics, since xtics depend on plot_bounds.xleft
* but plot_bounds.xleft depends on ytics. Boundary calculations depend
* on term->v_char etc, so terminal must be initialised first.
*/
boundary(plots, pcount);
/* Make palette */
if (is_plot_with_palette())
make_palette();
/* Give a chance for rectangles to be behind everything else */
place_objects( first_object, LAYER_BEHIND, 2);
place_pixmaps(LAYER_BEHIND, 2);
screen_ok = FALSE;
/* Sync point for epslatex text positioning */
(term->layer)(TERM_LAYER_BACKTEXT);
/* DRAW TICS AND GRID */
if (grid_layer == LAYER_BACK || grid_layer == LAYER_BEHIND)
place_grid(grid_layer);
/* DRAW ZERO AXES and update axis->term_zero */
axis_draw_2d_zeroaxis(FIRST_X_AXIS,FIRST_Y_AXIS);
axis_draw_2d_zeroaxis(FIRST_Y_AXIS,FIRST_X_AXIS);
axis_draw_2d_zeroaxis(SECOND_X_AXIS,SECOND_Y_AXIS);
axis_draw_2d_zeroaxis(SECOND_Y_AXIS,SECOND_X_AXIS);
/* DRAW VERTICAL AXES OF PARALLEL AXIS PLOTS */
place_parallel_axes(plots, LAYER_BACK);
/* DRAW RADIAL AXES OF SPIDERPLOTS */
place_spiderplot_axes(plots, LAYER_BACK);
/* DRAW PLOT BORDER */
if (draw_border)
plot_border();
/* Add back colorbox if appropriate */
if (is_plot_with_colorbox() && color_box.layer == LAYER_BACK)
draw_color_smooth_box(MODE_PLOT);
/* Fixed objects */
place_objects( first_object, LAYER_BACK, 2);
/* PLACE LABELS */
place_labels( first_label, LAYER_BACK, FALSE );
/* PLACE ARROWS */
place_arrows( LAYER_BACK );
/* Sync point for epslatex text positioning */
(term->layer)(TERM_LAYER_FRONTTEXT);
/* Draw axis labels and timestamps */
/* Note: As of Dec 2012 these are drawn as "front" text. */
draw_titles();
/* Draw the key, or at least reserve space for it (pass 1) */
if (key->visible)
draw_key( key, key_pass);
SECOND_KEY_PASS:
/* This tells the canvas, qt, and svg terminals to restart the plot */
/* count so that key titles are in sync with the plots they describe. */
(*t->layer)(TERM_LAYER_RESET_PLOTNO);
/* DRAW CURVES */
this_plot = plots;
previous_plot_style = 0;
for (curve = 0; curve < pcount; this_plot = this_plot->next, curve++) {
TBOOLEAN localkey = key->visible; /* a local copy */
this_plot->current_plotno = curve;
/* Sync point for start of new curve (used by svg, post, ...) */
if (term->hypertext) {
char *plaintext;
if (this_plot->title_no_enhanced)
plaintext = this_plot->title;
else
plaintext = estimate_plaintext(this_plot->title);
(term->hypertext)(TERM_HYPERTEXT_TITLE, plaintext);
}
(term->layer)(TERM_LAYER_BEFORE_PLOT);
/* set scaling for this plot's axes */
x_axis = this_plot->x_axis;
y_axis = this_plot->y_axis;
/* Crazy corner case handling Bug #3499425 */
if (this_plot->plot_style == HISTOGRAMS)
if ((!key_pass && key->front) && (prefer_line_styles)) {
struct lp_style_type ls;
lp_use_properties(&ls, this_plot->lp_properties.l_type+1);
this_plot->lp_properties.pm3d_color = ls.pm3d_color;
}
term_apply_lp_properties(&(this_plot->lp_properties));
/* Skip a line in the key between histogram clusters */
if (this_plot->plot_style == HISTOGRAMS
&& previous_plot_style == HISTOGRAMS
&& this_plot->histogram_sequence == 0 && !at_left_of_key()) {
key_count++;
advance_key(0);
}
/* Column-stacked histograms store their key titles internally */
if (this_plot->plot_style == HISTOGRAMS
&& histogram_opts.type == HT_STACKED_IN_TOWERS) {
text_label *key_entry;
localkey = 0;
if (this_plot->labels && (key_pass || !key->front)) {
struct lp_style_type save_lp = this_plot->lp_properties;
for (key_entry = this_plot->labels->next; key_entry;
key_entry = key_entry->next) {
int histogram_linetype = key_entry->tag + this_plot->histogram->startcolor;
this_plot->lp_properties.l_type = histogram_linetype;
this_plot->fill_properties.fillpattern = histogram_linetype;
if (key_entry->text) {
if (prefer_line_styles)
lp_use_properties(&this_plot->lp_properties, histogram_linetype);
else
load_linetype(&this_plot->lp_properties, histogram_linetype);
do_key_sample(this_plot, key, key_entry->text, 0.0);
}
key_count++;
advance_key(0);
}
free_labels(this_plot->labels);
this_plot->labels = NULL;
this_plot->lp_properties = save_lp;
}
/* Parallel plot titles are placed as xtic labels */
} else if (this_plot->plot_style == PARALLELPLOT) {
localkey = FALSE;
/* Spiderplot key samples are handled in plot_spiderplot */
} else if (this_plot->plot_style == SPIDERPLOT && !(this_plot->plot_type == KEYENTRY)) {
localkey = FALSE;
} else if (this_plot->title && !*this_plot->title) {
localkey = FALSE;
} else if (this_plot->plot_type == NODATA) {
localkey = FALSE;
} else if (key_pass || !key->front) {
ignore_enhanced(this_plot->title_no_enhanced);
/* don't write filename or function enhanced */
if (localkey && this_plot->title && !this_plot->title_is_suppressed) {
/* If title is "at {end|beg}" do not draw it in the key */
if (!this_plot->title_position
|| this_plot->title_position->scalex != character) {
coordval var_color;
key_count++;
advance_key(TRUE); /* invert only */
var_color = (this_plot->varcolor) ? this_plot->varcolor[0] : 0.0;
do_key_sample(this_plot, key, this_plot->title, var_color);
}
}
ignore_enhanced(FALSE);
}
/* If any plots have opted out of autoscaling, we need to recheck */
/* whether their points are INRANGE or not. */
if (this_plot->noautoscale && !key_pass)
recheck_ranges(this_plot);
/* and now the curves, plus any special key requirements */
/* be sure to draw all lines before drawing any points */
/* Skip missing/empty curves */
if (this_plot->plot_type != NODATA && !key_pass) {
switch (this_plot->plot_style) {
case IMPULSES:
plot_impulses(this_plot, X_AXIS.term_zero, Y_AXIS.term_zero);
break;
case LINES:
plot_lines(this_plot);
break;
case STEPS:
case FILLSTEPS:
plot_steps(this_plot);
break;
case FSTEPS:
plot_fsteps(this_plot);
break;
case HISTEPS:
plot_histeps(this_plot);
break;
case POINTSTYLE:
plot_points(this_plot);
break;
case LINESPOINTS:
plot_lines(this_plot);
plot_points(this_plot);
break;
case DOTS:
plot_dots(this_plot);
break;
case YERRORLINES:
case XERRORLINES:
case XYERRORLINES:
plot_lines(this_plot);
plot_bars(this_plot);
plot_points(this_plot);
break;
case YERRORBARS:
case XERRORBARS:
case XYERRORBARS:
plot_bars(this_plot);
plot_points(this_plot);
break;
case BOXXYERROR:
case BOXES:
plot_boxes(this_plot, Y_AXIS.term_zero);
break;
case HISTOGRAMS:
if (bar_layer == LAYER_FRONT)
plot_boxes(this_plot, Y_AXIS.term_zero);
/* Draw the bars first, so that the box will cover the bottom half */
if (histogram_opts.type == HT_ERRORBARS) {
/* Note that the bar linewidth may not match the border or plot linewidth */
(term->linewidth)(histogram_opts.bar_lw);
if (!need_fill_border(&default_fillstyle))
(term->linetype)(this_plot->lp_properties.l_type);
plot_bars(this_plot);
term_apply_lp_properties(&(this_plot->lp_properties));
}
if (bar_layer != LAYER_FRONT)
plot_boxes(this_plot, Y_AXIS.term_zero);
break;
case BOXERROR:
if (bar_layer != LAYER_FRONT)
plot_bars(this_plot);
plot_boxes(this_plot, Y_AXIS.term_zero);
if (bar_layer == LAYER_FRONT)
plot_bars(this_plot);
break;
case FILLEDCURVES:
if (this_plot->filledcurves_options.closeto == FILLEDCURVES_DEFAULT) {
if (this_plot->plot_type == DATA)
memcpy(&this_plot->filledcurves_options,
&filledcurves_opts_data, sizeof(filledcurves_opts));
else
memcpy(&this_plot->filledcurves_options,
&filledcurves_opts_func, sizeof(filledcurves_opts));
}
if (this_plot->filledcurves_options.closeto == FILLEDCURVES_BETWEEN
|| this_plot->filledcurves_options.closeto == FILLEDCURVES_ABOVE
|| this_plot->filledcurves_options.closeto == FILLEDCURVES_BELOW) {
plot_betweencurves(this_plot);
} else if (!this_plot->plot_smooth &&
(this_plot->filledcurves_options.closeto == FILLEDCURVES_ATY1
|| this_plot->filledcurves_options.closeto == FILLEDCURVES_ATY2
|| this_plot->filledcurves_options.closeto == FILLEDCURVES_ATR)) {
/* Smoothing may have trashed the original contents */
/* of the 2nd y data column, so piggybacking on the */
/* code for FILLEDCURVES_BETWEEN will not work. */
/* FIXME: Maybe piggybacking is always a bad idea? */
/* IIRC the original rationale was to get better clipping */
/* but the general polygon clipping code should now work. */
plot_betweencurves(this_plot);
} else {
plot_filledcurves(this_plot);
}
break;
case VECTOR:
case ARROWS:
plot_vectors(this_plot);
break;
case FINANCEBARS:
plot_f_bars(this_plot);
break;
case CANDLESTICKS:
plot_c_bars(this_plot);
break;
case BOXPLOT:
plot_boxplot(this_plot, FALSE);
break;
case PM3DSURFACE:
case SURFACEGRID:
int_warn(NO_CARET, "Can't use pm3d or surface for 2d plots");
break;
case LABELPOINTS:
place_labels( this_plot->labels->next, LAYER_PLOTLABELS, TRUE);
break;
case IMAGE:
this_plot->image_properties.type = IC_PALETTE;
process_image(this_plot, IMG_PLOT);
break;
case RGBIMAGE:
this_plot->image_properties.type = IC_RGB;
process_image(this_plot, IMG_PLOT);
break;
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