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parser.c
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parser.c
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/*
FLAM3 - cosmic recursive fractal flames
Copyright (C) 1992-2009 Spotworks LLC
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "parser.h"
#include "interpolation.h"
#include "filters.h"
#include <errno.h>
static int flam3_conversion_failed;
int flam3_atoi(char *nstr) {
/* Note that this is NOT thread-safe, but simplifies things significantly. */
int res;
char *endp;
/* Reset errno */
errno=0;
/* Convert the string using strtol */
res = strtol(nstr, &endp, 10);
/* Check errno & return string */
if (endp!=nstr+strlen(nstr)) {
flam3_conversion_failed = 1;
fprintf(stderr,"flam3_atoi : Error converting :%s: extra chars\n",nstr);
}
if (errno) {
flam3_conversion_failed = 1;
fprintf(stderr,"flam3_atoi : Error converting :%s:\n",nstr);
}
return(res);
}
double flam3_atof(char *nstr) {
/* Note that this is NOT thread-safe, but simplifies things significantly. */
double res;
char *endp;
/* Reset errno */
errno=0;
/* Convert the string using strtod */
res = strtod(nstr, &endp);
/* Check errno & return string */
if (endp!=nstr+strlen(nstr)) {
flam3_conversion_failed = 1;
fprintf(stderr,"flam3_atof: Error converting :%s: extra chars\n",nstr);
}
if (errno) {
flam3_conversion_failed = 1;
fprintf(stderr,"flam3_atof: Error converting :%s:\n",nstr);
}
return(res);
}
int var2n(const char *s) {
int i;
for (i = 0; i < flam3_nvariations; i++)
if (!strcmp(s, flam3_variation_names[i])) return i;
return flam3_variation_none;
}
int flam3_parse_hexformat_colors(char *colstr, flam3_genome *cp, int numcolors, int chan) {
int c_idx=0;
int col_count=0;
int r,g,b,a;
int sscanf_ret;
char tmps[2];
int skip = (int)fabs(chan);
/* Strip whitespace prior to first color */
while (isspace( (int)colstr[c_idx]))
c_idx++;
do {
/* Parse an RGB triplet at a time... */
a = 255;
if (chan==3)
sscanf_ret = sscanf(&(colstr[c_idx]),"%2x%2x%2x",&r,&g,&b);
else if (chan==-4)
sscanf_ret = sscanf(&(colstr[c_idx]),"00%2x%2x%2x",&r,&g,&b);
else // chan==4
sscanf_ret = sscanf(&(colstr[c_idx]),"%2x%2x%2x%2x",&r,&g,&b,&a);
if ((chan!=4 && sscanf_ret != 3) || (chan==4 && sscanf_ret != 4)) {
fprintf(stderr, "Error: Problem reading hexadecimal color data.\n");
return(1);
}
c_idx += 2*skip;
while (isspace( (int)colstr[c_idx]))
c_idx++;
cp->palette[col_count].color[0] = r / 255.0;
cp->palette[col_count].color[1] = g / 255.0;
cp->palette[col_count].color[2] = b / 255.0;
cp->palette[col_count].color[3] = a / 255.0;
cp->palette[col_count].index = col_count;
col_count++;
} while (col_count<numcolors);
if (sscanf(&(colstr[c_idx]),"%1s",tmps)>0) {
fprintf(stderr,"error: extra data at end of hex color data '%s'\n",&(colstr[c_idx]));
return(1);
}
return(0);
}
int flam3_interp_missing_colors(flam3_genome *cp) {
/* Check for a non-full palette */
int minix,maxix;
int colorli,colorri;
int wrapmin,wrapmax;
int intl, intr;
int str,enr;
int i,j,k;
double prcr;
minix = 0;
for (i=0; i<256; i++) {
if (cp->palette[i].index >= 0) {
minix = i;
break;
}
}
if (i==256) {
/* No colors. Set all indices properly. */
for (i=0;i<256;i++)
cp->palette[i].index = i;
return(1);
}
wrapmin = minix + 256;
maxix = 255;
for (i=255;i>=0;i--) {
if (cp->palette[i].index >= 0) {
maxix = i;
break;
}
}
wrapmax = maxix - 256;
/* Loop over the indices looking for negs */
i = 0;
while(i<256) {
if (cp->palette[i].index < 0) {
/* Start of a range of negs */
str = i;
intl = i-1;
intr = i+1;
colorli = intl;
colorri = intr;
while (cp->palette[i].index<0 && i<256) {
enr = i;
intr = i+1;
colorri = intr;
i++;
}
if (intl==-1) {
intl = wrapmax;
colorli = maxix;
}
if (intr==256) {
intr = wrapmin;
colorri = minix;
}
for (j=str;j<=enr;j++) {
prcr = (j-intl)/(double)(intr-intl);
for (k=0;k<=3;k++)
cp->palette[j].color[k] = cp->palette[colorli].color[k] * (1.0-prcr) + cp->palette[colorri].color[k] * prcr;
cp->palette[j].index = j;
}
i = colorri+1;
} else
i ++;
}
return(0);
}
void scan_for_flame_nodes(xmlNode *cur_node, char *parent_file, int default_flag, flam3_genome **all_cps, int *all_ncps) {
xmlNode *this_node = NULL;
flam3_genome loc_current_cp;
flam3_genome *genome_storage = *all_cps; /* To simplify semantics */
size_t f3_storage;
int pfe_success;
int col_success;
memset(&loc_current_cp,0,sizeof(flam3_genome));
/* Loop over this level of elements */
for (this_node=cur_node; this_node; this_node = this_node->next) {
/* Check to see if this element is a <flame> element */
if (this_node->type == XML_ELEMENT_NODE && !xmlStrcmp(this_node->name, (const xmlChar *)"flame")) {
/* This is a flame element. Parse it. */
clear_cp(&loc_current_cp, default_flag);
pfe_success = parse_flame_element(this_node,&loc_current_cp);
if (pfe_success>0) {
fprintf(stderr,"error parsing flame element\n");
all_cps = NULL; /* leaks memory but terminates */
/* !!! free all_cp properly !!! */
*all_ncps = 0;
return;
}
/* Copy this cp into the array */
f3_storage = (1+*all_ncps)*sizeof(flam3_genome);
genome_storage = realloc(genome_storage, f3_storage);
/* Must set value of pointer to new storage location */
*all_cps = genome_storage;
/* Clear out the realloc'd memory */
memset(&(genome_storage[*all_ncps]),0,sizeof(flam3_genome));
if (loc_current_cp.palette_index != -1) {
col_success = flam3_get_palette(loc_current_cp.palette_index, loc_current_cp.palette,
loc_current_cp.hue_rotation);
if (col_success < 0)
fprintf(stderr,"error retrieving palette %d, setting to all white\n",loc_current_cp.palette_index);
}
col_success = flam3_interp_missing_colors(&loc_current_cp);
loc_current_cp.genome_index = *all_ncps;
memset(loc_current_cp.parent_fname, 0, flam3_parent_fn_len);
strncpy(loc_current_cp.parent_fname,parent_file,flam3_parent_fn_len-1);
flam3_copy(&(genome_storage[*all_ncps]), &loc_current_cp);
(*all_ncps) ++;
} else {
/* Check all of the children of this element */
scan_for_flame_nodes(this_node->children, parent_file, default_flag, all_cps, all_ncps);
}
}
/* Clear the cp (frees allocated memory) */
clear_cp(&loc_current_cp, default_flag);
}
int parse_flame_element(xmlNode *flame_node, flam3_genome *loc_current_cp) {
flam3_genome *cp = loc_current_cp;
xmlNode *chld_node, *motion_node;
xmlNodePtr edit_node;
xmlAttrPtr att_ptr, cur_att;
int solo_xform=-1;
char *att_str;
int num_std_xforms=-1;
char tmps[2];
int i;
flam3_xform tmpcpy;
flam3_chaos_entry *xaos=NULL;
int num_xaos=0;
/* Reset the conversion error flag */
/* NOT threadsafe */
flam3_conversion_failed=0;
/* Store this flame element in the current cp */
/* Wipe out the current palette, replace with -1 for each element */
for (i=0;i<256;i++) {
cp->palette[i].color[0] = 0;
cp->palette[i].color[1] = 0;
cp->palette[i].color[2] = 0;
cp->palette[i].color[3] = 0;
cp->palette[i].index = -1;
}
/* The top level element is a flame element. */
/* Read the attributes of it and store them. */
att_ptr = flame_node->properties;
if (att_ptr==NULL) {
fprintf(stderr, "Error : <flame> element has no attributes.\n");
return(1);
}
memset(cp->flame_name,0,flam3_name_len+1);
for (cur_att = att_ptr; cur_att; cur_att = cur_att->next) {
att_str = (char *) xmlGetProp(flame_node,cur_att->name);
/* Compare attribute names */
if (!xmlStrcmp(cur_att->name, (const xmlChar *)"time")) {
cp->time = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"hsv_rgb_palette_blend")) {
cp->hsv_rgb_palette_blend = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"interpolation")) {
if (!strcmp("linear", att_str)) {
cp->interpolation = flam3_interpolation_linear;
} else if (!strcmp("smooth", att_str)) {
cp->interpolation = flam3_interpolation_smooth;
} else {
fprintf(stderr, "warning: unrecognized interpolation type %s.\n", att_str);
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"palette_interpolation")) {
if (!strcmp("hsv", att_str)) {
cp->palette_interpolation = flam3_palette_interpolation_hsv;
} else if (!strcmp("sweep", att_str)) {
cp->palette_interpolation = flam3_palette_interpolation_sweep;
} else if (!strcmp("hsv_circular", att_str)) {
cp->palette_interpolation = flam3_palette_interpolation_hsv_circular;
} else if (!strcmp("rgb", att_str)) {
cp->palette_interpolation = flam3_palette_interpolation_rgb;
} else {
fprintf(stderr, "warning: unrecognized palette interpolation type %s.\n", att_str);
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"interpolation_space") ||
!xmlStrcmp(cur_att->name, (const xmlChar *)"interpolation_type")) {
if (!strcmp("linear", att_str))
cp->interpolation_type = flam3_inttype_linear;
else if (!strcmp("log", att_str))
cp->interpolation_type = flam3_inttype_log;
else if (!strcmp("old", att_str))
cp->interpolation_type = flam3_inttype_compat;
else if (!strcmp("older", att_str))
cp->interpolation_type = flam3_inttype_older;
else
fprintf(stderr,"warning: unrecognized interpolation_type %s.\n",att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"name")) {
strncpy(cp->flame_name, att_str, flam3_name_len);
i = (int)strlen(cp->flame_name)-1;
while(i-->0) {
if (isspace(cp->flame_name[i]))
cp->flame_name[i] = '_';
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"palette")) {
cp->palette_index = flam3_atoi(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"size")) {
if (sscanf(att_str, "%d %d%1s", &cp->width, &cp->height, tmps) != 2) {
fprintf(stderr,"error: invalid size attribute '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"center")) {
if (sscanf(att_str, "%lf %lf%1s", &cp->center[0], &cp->center[1], tmps) != 2) {
fprintf(stderr,"error: invalid center attribute '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
cp->rot_center[0] = cp->center[0];
cp->rot_center[1] = cp->center[1];
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"scale")) {
cp->pixels_per_unit = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"rotate")) {
cp->rotate = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"zoom")) {
cp->zoom = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"oversample")) {
cp->spatial_oversample = flam3_atoi(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"supersample")) {
cp->spatial_oversample = flam3_atoi(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"filter")) {
cp->spatial_filter_radius = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"filter_shape")) {
if (!strcmp("gaussian", att_str))
cp->spatial_filter_select = flam3_gaussian_kernel;
else if (!strcmp("hermite", att_str))
cp->spatial_filter_select = flam3_hermite_kernel;
else if (!strcmp("box", att_str))
cp->spatial_filter_select = flam3_box_kernel;
else if (!strcmp("triangle", att_str))
cp->spatial_filter_select = flam3_triangle_kernel;
else if (!strcmp("bell", att_str))
cp->spatial_filter_select = flam3_bell_kernel;
else if (!strcmp("bspline", att_str))
cp->spatial_filter_select = flam3_b_spline_kernel;
else if (!strcmp("mitchell", att_str))
cp->spatial_filter_select = flam3_mitchell_kernel;
else if (!strcmp("blackman", att_str))
cp->spatial_filter_select = flam3_blackman_kernel;
else if (!strcmp("catrom", att_str))
cp->spatial_filter_select = flam3_catrom_kernel;
else if (!strcmp("hanning", att_str))
cp->spatial_filter_select = flam3_hanning_kernel;
else if (!strcmp("hamming", att_str))
cp->spatial_filter_select = flam3_hamming_kernel;
else if (!strcmp("lanczos3", att_str))
cp->spatial_filter_select = flam3_lanczos3_kernel;
else if (!strcmp("lanczos2", att_str))
cp->spatial_filter_select = flam3_lanczos2_kernel;
else if (!strcmp("quadratic", att_str))
cp->spatial_filter_select = flam3_quadratic_kernel;
else
fprintf(stderr, "warning: unrecognized kernel shape %s. Using gaussian.\n", att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"temporal_filter_type")) {
if (!strcmp("box", att_str))
cp->temporal_filter_type = flam3_temporal_box;
else if (!strcmp("gaussian", att_str))
cp->temporal_filter_type = flam3_temporal_gaussian;
else if (!strcmp("exp",att_str))
cp->temporal_filter_type = flam3_temporal_exp;
else
fprintf(stderr, "warning: unrecognized temporal filter %s. Using box.\n",att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"temporal_filter_width")) {
cp->temporal_filter_width = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"temporal_filter_exp")) {
cp->temporal_filter_exp = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"palette_mode")) {
if (!strcmp("step", att_str))
cp->palette_mode = flam3_palette_mode_step;
else if (!strcmp("linear", att_str))
cp->palette_mode = flam3_palette_mode_linear;
else
fprintf(stderr,"warning: unrecognized palette mode %s. Using step.\n",att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"quality")) {
cp->sample_density = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"passes")) {
cp->nbatches = flam3_atoi(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"temporal_samples")) {
cp->ntemporal_samples = flam3_atoi(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"background")) {
if (sscanf(att_str, "%lf %lf %lf%1s", &cp->background[0], &cp->background[1], &cp->background[2], tmps) != 3) {
fprintf(stderr,"error: invalid background attribute '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"brightness")) {
cp->brightness = flam3_atof(att_str);
/* } else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"contrast")) {
cp->contrast = flam3_atof(att_str);*/
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"gamma")) {
cp->gamma = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"highlight_power")) {
cp->highlight_power = atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"vibrancy")) {
cp->vibrancy = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"hue")) {
cp->hue_rotation = fmod(flam3_atof(att_str), 1.0);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"estimator_radius")) {
cp->estimator = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"estimator_minimum")) {
cp->estimator_minimum = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"estimator_curve")) {
cp->estimator_curve = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"gamma_threshold")) {
cp->gam_lin_thresh = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"soloxform")) {
solo_xform = flam3_atof(att_str);
}
xmlFree(att_str);
}
/* Finished with flame attributes. Now look at children of flame element. */
for (chld_node=flame_node->children; chld_node; chld_node = chld_node->next) {
/* Is this a color node? */
if (!xmlStrcmp(chld_node->name, (const xmlChar *)"color")) {
int index = -1;
double r=0.0,g=0.0,b=0.0,a=0.0;
/* Loop through the attributes of the color element */
att_ptr = chld_node->properties;
if (att_ptr==NULL) {
fprintf(stderr,"Error: No attributes for color element.\n");
return(1);
}
for (cur_att=att_ptr; cur_att; cur_att = cur_att->next) {
att_str = (char *) xmlGetProp(chld_node,cur_att->name);
a = 255.0;
if (!xmlStrcmp(cur_att->name, (const xmlChar *)"index")) {
index = flam3_atoi(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"rgb")) {
if (sscanf(att_str, "%lf %lf %lf%1s", &r, &g, &b, tmps) != 3) {
fprintf(stderr,"error: invalid rgb attribute '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"rgba")) {
if (sscanf(att_str, "%lf %lf %lf %lf%1s", &r, &g, &b, &a, tmps) != 4) {
fprintf(stderr,"error: invalid rgba attribute '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"a")) {
if (sscanf(att_str, "%lf%1s", &a, tmps) != 1) {
fprintf(stderr,"error: invalid a attribute '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
} else {
fprintf(stderr,"Error: Unknown color attribute '%s'\n",cur_att->name);
xmlFree(att_str);
return(1);
}
xmlFree(att_str);
}
if (index >= 0 && index <= 255) {
cp->palette[index].color[3] = a / 255.0;
/* Don't forget to premultiply the palette... */
cp->palette[index].color[0] = cp->palette[index].color[3] * r / 255.0;
cp->palette[index].color[1] = cp->palette[index].color[3] * g / 255.0;
cp->palette[index].color[2] = cp->palette[index].color[3] * b / 255.0;
cp->palette[index].index = index;
} else {
fprintf(stderr,"Error: Color element with bad/missing index attribute (%d)\n",index);
return(1);
}
} else if (!xmlStrcmp(chld_node->name, (const xmlChar *)"colors")) {
int count = 0;
/* Loop through the attributes of the colors element */
att_ptr = chld_node->properties;
if (att_ptr==NULL) {
fprintf(stderr,"Error: No attributes for colors element.\n");
return(1);
}
for (cur_att=att_ptr; cur_att; cur_att = cur_att->next) {
att_str = (char *) xmlGetProp(chld_node,cur_att->name);
if (!xmlStrcmp(cur_att->name, (const xmlChar *)"count")) {
count = flam3_atoi(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"data")) {
if (flam3_parse_hexformat_colors(att_str, cp, count, -4) > 0) {
fprintf(stderr,"error parsing hexformatted colors\n");
xmlFree(att_str);
return(1);
}
} else {
fprintf(stderr,"Error: Unknown color attribute '%s'\n",cur_att->name);
xmlFree(att_str);
return(1);
}
xmlFree(att_str);
}
} else if (!xmlStrcmp(chld_node->name, (const xmlChar *)"palette")) {
/* This could be either the old form of palette or the new form */
/* Make sure BOTH are not specified, otherwise either are ok */
int numcolors=0;
int numbytes=0;
int old_format=0;
int new_format=0;
int index0, index1;
double hue0, hue1;
double blend = 0.5;
index0 = index1 = flam3_palette_random;
hue0 = hue1 = 0.0;
/* Loop through the attributes of the palette element */
att_ptr = chld_node->properties;
if (att_ptr==NULL) {
fprintf(stderr,"Error: No attributes for palette element.\n");
return(1);
}
for (cur_att=att_ptr; cur_att; cur_att = cur_att->next) {
att_str = (char *) xmlGetProp(chld_node,cur_att->name);
if (!xmlStrcmp(cur_att->name, (const xmlChar *)"index0")) {
old_format++;
index0 = flam3_atoi(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"index1")) {
old_format++;
index1 = flam3_atoi(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"hue0")) {
old_format++;
hue0 = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"hue1")) {
old_format++;
hue1 = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"blend")) {
old_format++;
blend = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"count")) {
new_format++;
numcolors = flam3_atoi(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"format")) {
new_format++;
if (!strcmp(att_str,"RGB"))
numbytes=3;
else if (!strcmp(att_str,"RGBA"))
numbytes=4;
else {
fprintf(stderr,"Error: Unrecognized palette format string (%s)\n",att_str);
xmlFree(att_str);
return(1);
}
} else {
fprintf(stderr,"Error: Unknown palette attribute '%s'\n",cur_att->name);
xmlFree(att_str);
return(1);
}
xmlFree(att_str);
}
/* Old or new format? */
if (new_format>0 && old_format>0) {
fprintf(stderr,"Error: mixing of old and new palette tag syntax not allowed.\n");
return(1);
}
if (old_format>0)
interpolate_cmap(cp->palette, blend, index0, hue0, index1, hue1);
else {
char *pal_str;
/* Read formatted string from contents of tag */
pal_str = (char *) xmlNodeGetContent(chld_node);
if (flam3_parse_hexformat_colors(pal_str, cp, numcolors, numbytes) > 0) {
fprintf(stderr,"error reading hexformatted colors\n");
xmlFree(pal_str);
return(1);
}
xmlFree(pal_str);
}
} else if (!xmlStrcmp(chld_node->name, (const xmlChar *)"symmetry")) {
int kind=0;
int bef,aft;
/* Loop through the attributes of the symmetry element */
att_ptr = chld_node->properties;
if (att_ptr==NULL) {
fprintf(stderr,"Error: No attributes for symmetry element.\n");
return(1);
}
for (cur_att=att_ptr; cur_att; cur_att = cur_att->next) {
att_str = (char *) xmlGetProp(chld_node,cur_att->name);
if (!xmlStrcmp(cur_att->name, (const xmlChar *)"kind")) {
kind = flam3_atoi(att_str);
} else {
fprintf(stderr,"Error: Unknown symmetry attribute '%s'\n",cur_att->name);
xmlFree(att_str);
return(1);
}
xmlFree(att_str);
}
bef = cp->num_xforms;
flam3_add_symmetry(cp,kind);
aft = cp->num_xforms;
num_std_xforms += (aft-bef);
} else if (!xmlStrcmp(chld_node->name, (const xmlChar *)"xform") ||
!xmlStrcmp(chld_node->name, (const xmlChar *)"finalxform")) {
int xf = cp->num_xforms;
if (!xmlStrcmp(chld_node->name, (const xmlChar *)"finalxform")) {
if (cp->final_xform_index >=0) {
fprintf(stderr,"Error: Cannot specify more than one final xform.\n");
return(1);
}
flam3_add_xforms(cp, 1, 0, 1);
cp->xform[xf].var[0]=0.0;
cp->final_xform_index = xf;
/* Now, if present, the xform enable defaults to on */
cp->final_xform_enable = 1;
} else {
/* Add one to the counter */
flam3_add_xforms(cp, 1, 0, 0);
/* If there was already a final xform, we have to change xf to point to the second to last xform */
if (cp->final_xform_index>=0)
xf--;
cp->xform[xf].var[0]=0.0;
num_std_xforms++;
}
if (parse_xform_xml(chld_node, &(cp->xform[xf]), &num_xaos, &xaos, num_std_xforms, 0) != 0)
return(1);
if (cp->final_xform_index == xf && cp->xform[xf].density != 0.0) {
fprintf(stderr,"Error: Final xforms should not have weight specified.\n");
return(1);
}
/* Check for non-zero motion_* params */
if (cp->xform[xf].motion_freq != 0 || cp->xform[xf].motion_func != 0) {
fprintf(stderr,"Error: Motion parameters should not be specified in xforms.\n");
return(1);
}
/* Motion Language: Check the xform element for children - should be named 'motion'. */
for (motion_node=chld_node->children; motion_node; motion_node = motion_node->next) {
if (!xmlStrcmp(motion_node->name, (const xmlChar *)"motion")) {
int nm = cp->xform[xf].num_motion;
/* Add motion element to xform */
flam3_add_motion_element( &cp->xform[xf] );
/* Read motion xml */
if (parse_xform_xml(motion_node, &(cp->xform[xf].motion[nm]), NULL, NULL, 0, 1) != 0)
return(1);
}
}
} else if (!xmlStrcmp(chld_node->name, (const xmlChar *)"edit")) {
/* Create a new XML document with this edit node as the root node */
cp->edits = xmlNewDoc( (const xmlChar *)"1.0");
edit_node = xmlCopyNode( chld_node, 1 );
xmlDocSetRootElement(cp->edits, edit_node);
}
} /* Done parsing flame element. */
num_std_xforms++;
for (i=0;i<num_std_xforms;i++) {
/* Adjust opacity with solo xform setting */
if (solo_xform>=0 && i!=solo_xform)
cp->xform[i].opacity = 0.0;
}
/* Set the chaos array entries with the values in the xaos list */
for (i=0;i<num_xaos;i++)
cp->chaos[xaos[i].from][xaos[i].to] = xaos[i].scalar;
free(xaos);
/* If there is a final xform in this cp, move it to the end of the list */
if (cp->final_xform_index >=0 && cp->final_xform_index != (cp->num_xforms-1)) {
/* Make a copy of the final xform */
tmpcpy = cp->xform[cp->final_xform_index];
/* Move each other xform up one */
for (i=cp->final_xform_index+1;i<cp->num_xforms;i++)
cp->xform[i-1] = cp->xform[i];
/* Put the final at the end */
cp->xform[cp->num_xforms-1] = tmpcpy;
cp->final_xform_index = cp->num_xforms - 1;
}
/* Check for bad parse */
if (flam3_conversion_failed) {
fprintf(stderr,"error: parsing a double or int attribute's value.\n");
return(1);
}
return(0);
}
int parse_xform_xml(xmlNode *chld_node,flam3_xform *this_xform, int *num_xaos,
flam3_chaos_entry **xaos, int numstd, int motionxf) {
xmlAttrPtr att_ptr, cur_att;
char *att_str, *cpy;
char tmps[2];
int j,k;
/* Loop through the attributes of the xform element */
att_ptr = chld_node->properties;
if (att_ptr==NULL) {
fprintf(stderr,"Error: No attributes for element.\n");
return(1);
}
for (cur_att=att_ptr; cur_att; cur_att = cur_att->next) {
att_str = (char *) xmlGetProp(chld_node,cur_att->name);
cpy = att_str;
if (!xmlStrcmp(cur_att->name, (const xmlChar *)"weight")) {
this_xform->density = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"symmetry")) {
/* Deprecated. Set both color_speed and animate to this value. */
this_xform->color_speed = (1.0-flam3_atof(att_str))/2.0;
this_xform->animate = flam3_atof(att_str)>0 ? 0 : 1;
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"color_speed")) {
this_xform->color_speed = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"animate")) {
this_xform->animate = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"motion_frequency")) {
this_xform->motion_freq = flam3_atoi(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"motion_function")) {
if (!strcmp("sin", att_str)) {
this_xform->motion_func = MOTION_SIN;
} else if (!strcmp("triangle",att_str)) {
this_xform->motion_func = MOTION_TRIANGLE;
} else if (!strcmp("hill",att_str)) {
this_xform->motion_func = MOTION_HILL;
} else {
fprintf(stderr,"Error: unknown motion function '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"color")) {
double tmpc1;
this_xform->color = 0.0;
/* Try two coords first */
if (sscanf(att_str, "%lf %lf%1s", &this_xform->color, &tmpc1, tmps) != 2) {
/* Try one color */
if (sscanf(att_str, "%lf%1s", &this_xform->color,tmps) != 1) {
fprintf(stderr,"Error: malformed xform color attribute '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"var1")) {
for (j=0; j < flam3_nvariations; j++) {
this_xform->var[j] = 0.0;
}
j = flam3_atoi(att_str);
if (j < 0 || j >= flam3_nvariations) {
fprintf(stderr,"Error: Bad variation (%d)\n",j);
xmlFree(att_str);
return(1);
}
this_xform->var[j] = 1.0;
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"var")) {
for (j=0; j < flam3_nvariations; j++) {
char *cpy2;
errno=0;
this_xform->var[j] = strtod(cpy, &cpy2);
if (errno != 0 || cpy==cpy2) {
fprintf(stderr,"error: bad value in var attribute '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
cpy=cpy2;
}
if (cpy != att_str+strlen(att_str)) {
fprintf(stderr,"error: extra chars at the end of var attribute '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"chaos")) {
/* Chaos scalars */
char *tok;
double scal;
int toi=0;
if (motionxf==1) {
fprintf(stderr,"error: motion element cannot have a chaos attribute.\n");
xmlFree(att_str);
return(1);
}
/* The att string contains at least one value, delimited by a space */
tok = strtok(cpy," ");
while (tok!=NULL) {
scal = flam3_atof(tok);
/* Skip 1.0 entries */
if (scal==1.0) {
toi++;
tok = strtok(NULL," ");
continue;
}
/* Realloc the xaos list */
*xaos = realloc((*xaos),(*num_xaos+1) * sizeof(flam3_chaos_entry));
/* Populate the xaos list */
(*xaos)[*num_xaos].from = numstd;
(*xaos)[*num_xaos].to = toi;
(*xaos)[*num_xaos].scalar = scal;
toi++;
(*num_xaos)++;
/* Get the next token */
tok = strtok(NULL," ");
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"plotmode")) {
if (motionxf==1) {
fprintf(stderr,"error: motion element cannot have a plotmode attribute.\n");
xmlFree(att_str);
return(1);
}
if (!strcmp("off", att_str))
this_xform->opacity = 0.0;
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"opacity")) {
this_xform->opacity = flam3_atof(att_str);
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"coefs")) {
for (k=0; k<3; k++) {
for (j=0; j<2; j++) {
char *cpy2;
errno = 0;
this_xform->c[k][j] = strtod(cpy, &cpy2);
if (errno != 0 || cpy==cpy2) {
fprintf(stderr,"error: bad value in coefs attribute '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
cpy=cpy2;
}
}
if (cpy != att_str+strlen(att_str)) {
fprintf(stderr,"error: extra chars at the end of coefs attribute '%s'\n",att_str);
xmlFree(att_str);
return(1);
}
} else if (!xmlStrcmp(cur_att->name, (const xmlChar *)"post")) {
for (k = 0; k < 3; k++) {
for (j = 0; j < 2; j++) {
char *cpy2;
errno = 0;
this_xform->post[k][j] = strtod(cpy, &cpy2);
if (errno != 0 || cpy==cpy2) {
fprintf(stderr,"error: bad value in post attribute '%s'\n",att_str);
xmlFree(att_str);