415c0f1999-01-22Mirar (Pontus Hagland) /* **! module Image **! note
d9db231999-05-30Mirar (Pontus Hagland) **! $Id: colors.c,v 1.20 1999/05/30 20:11:53 mirar Exp $
448c201999-04-13Mirar (Pontus Hagland) **! submodule Color
415c0f1999-01-22Mirar (Pontus Hagland) **!
5e94231999-01-23Mirar (Pontus Hagland) **! This module keeps names and easy handling **! for easy color support. It gives you an easy **! way to get colors from names.
415c0f1999-01-22Mirar (Pontus Hagland) **!
5e94231999-01-23Mirar (Pontus Hagland) **! A color is here an object, containing color **! information and methods for conversion, see below.
4d21f91999-01-24Mirar (Pontus Hagland) **!
448c201999-04-13Mirar (Pontus Hagland) **! <ref>Image.Color</ref> can be called to make a color object. **! <ref>Image.Color()</ref> takes the following arguments:
4d21f91999-01-24Mirar (Pontus Hagland) **! <pre>
448c201999-04-13Mirar (Pontus Hagland) **! Image.Color(string name) // "red" **! Image.Color(string prefix_string) // "lightblue" **! Image.Color(string hex_name) // "#ff00ff" **! Image.Color(string cmyk_string) // "%17,42,0,19.4" **! Image.Color(string hsv_string) // "%@327,90,32" **! Image.Color(int red, int green, int blue)
4d21f91999-01-24Mirar (Pontus Hagland) **! </pre> **! **! The color names available can be listed by using indices
448c201999-04-13Mirar (Pontus Hagland) **! on Image.Color. The colors are available by name directly **! as <tt>Image.Color.name</tt>, too:
4d21f91999-01-24Mirar (Pontus Hagland) **! <pre>
448c201999-04-13Mirar (Pontus Hagland) **! ...Image.Color.red... **! ...Image.Color.green...
4d21f91999-01-24Mirar (Pontus Hagland) **! or, maybe
448c201999-04-13Mirar (Pontus Hagland) **! import Image.Color;
4d21f91999-01-24Mirar (Pontus Hagland) **! ...red... **! ...green... **! ...lightgreen... **! </pre> **! **! Giving red, green and blue values is equal to calling
448c201999-04-13Mirar (Pontus Hagland) **! <ref>Image.Color.rgb</ref>().
4d21f91999-01-24Mirar (Pontus Hagland) **! **! The prefix_string method is a form for getting modified **! colors, it understands all modifiers
448c201999-04-13Mirar (Pontus Hagland) **! (<link to=Image.Color.Color.light>light</link>, **! <link to=Image.Color.Color.dark>dark</link>, **! <link to=Image.Color.Color.bright>bright</link>, **! <link to=Image.Color.Color.dull>dull</link> and **! <link to=Image.Color.Color.neon>neon</link>). Simply use
7428421999-01-24Mirar (Pontus Hagland) **! "method"+"color"; (as in <tt>lightgreen</tt>,
4d21f91999-01-24Mirar (Pontus Hagland) **! <tt>dullmagenta</tt>, <tt>lightdullorange</tt>). **!
2f5efe1999-01-24Mirar (Pontus Hagland) **! The <tt>hex_name</tt> form is a simple **! <tt>#rrggbb</tt> form, as in HTML or X-program argument. **! A shorter form (<tt>#rgb</tt>) is also accepted. This
448c201999-04-13Mirar (Pontus Hagland) **! is the inverse to the <ref>Image.Color.Color->hex</ref>()
2f5efe1999-01-24Mirar (Pontus Hagland) **! method. **! **! The <tt>cmyk_string</tt> is a string form of giving **! <i>cmyk</i> (cyan, magenta, yellow, black) color. These **! values are floats representing percent. **! **! The <tt>hsv_string</tt> is another hue, saturation, value **! representation, but in floats; hue is in degree range (0..360), **! and saturation and value is given in percent. <i>This is not **! the same as returned or given to the <ref>hsv</ref>() methods!</i> **!
448c201999-04-13Mirar (Pontus Hagland) **! see also: Image.Color.Color->name, Image.Color.Color->rgb
4d21f91999-01-24Mirar (Pontus Hagland) **! **! added: **! pike 0.7 **! **! note:
448c201999-04-13Mirar (Pontus Hagland) **! <tt>Image.Color["something"]</tt> will never(!) generate an error,
4d21f91999-01-24Mirar (Pontus Hagland) **! but a zero_type 0, if the color is unknown. This is enough **! to give the error "not present in module", if used
448c201999-04-13Mirar (Pontus Hagland) **! as <tt>Image.Color.something</tt>, though.
4d21f91999-01-24Mirar (Pontus Hagland) **! **! If you are using colors from for instance a webpage, you might
448c201999-04-13Mirar (Pontus Hagland) **! want to create the color from <ref>Image.Color.guess</ref>(),
4d21f91999-01-24Mirar (Pontus Hagland) **! since that method is more tolerant for mistakes and errors. **!
448c201999-04-13Mirar (Pontus Hagland) **! <tt>Image.Color</tt>() is case- and space-sensitive. **! Use <ref>Image.Color.guess</ref>() to catch all variants.
4d21f91999-01-24Mirar (Pontus Hagland) **! **! and subtract with a space (lower_case(x)-" ") to make **! sure you get all variants.
5e94231999-01-23Mirar (Pontus Hagland) **!
448c201999-04-13Mirar (Pontus Hagland) **! see also: Image.Color.Color, Image.Color.guess, Image, Image.Colortable
4d21f91999-01-24Mirar (Pontus Hagland) **!
448c201999-04-13Mirar (Pontus Hagland) **! class Color
5e94231999-01-23Mirar (Pontus Hagland) **! This is the color object. It has six readable variables, **! <tt>r</tt>, <tt>g</tt>, <tt>b</tt>, for the <i>red</i>, **! <i>green</i> and <i>blue</i> values, **! and <tt>h</tt>, <tt>s</tt>, <tt>v</tt>, for **! the <i>hue</i>, <i>saturation</i> anv <i>value</i> values.
415c0f1999-01-22Mirar (Pontus Hagland) */ #include "global.h"
d9db231999-05-30Mirar (Pontus Hagland) RCSID("$Id: colors.c,v 1.20 1999/05/30 20:11:53 mirar Exp $");
415c0f1999-01-22Mirar (Pontus Hagland) 
d9db231999-05-30Mirar (Pontus Hagland) #include "image_machine.h"
415c0f1999-01-22Mirar (Pontus Hagland) 
5e94231999-01-23Mirar (Pontus Hagland) #include <math.h>
415c0f1999-01-22Mirar (Pontus Hagland) #include "stralloc.h" #include "pike_macros.h" #include "object.h" #include "constants.h" #include "interpret.h" #include "svalue.h" #include "array.h" #include "mapping.h" #include "threads.h" #include "builtin_functions.h" #include "dmalloc.h"
5e94231999-01-23Mirar (Pontus Hagland) #include "operators.h"
415c0f1999-01-22Mirar (Pontus Hagland) #include "module_support.h"
2f5efe1999-01-24Mirar (Pontus Hagland) #include "opcodes.h"
415c0f1999-01-22Mirar (Pontus Hagland)  #include "image.h" #include "colortable.h" static struct mapping *colors=NULL; static struct object *colortable=NULL; static struct array *colornames=NULL; struct program *image_color_program=NULL; extern struct program *image_colortable_program; static struct pike_string *str_array; static struct pike_string *str_string; static struct pike_string *str_r; static struct pike_string *str_g; static struct pike_string *str_b; static struct pike_string *str_h; static struct pike_string *str_s; static struct pike_string *str_v;
7a49a11999-04-10Mirar (Pontus Hagland) static struct pike_string *no_name;
415c0f1999-01-22Mirar (Pontus Hagland) 
e405f01999-01-24Mirar (Pontus Hagland) /* forward */
cded6a1999-01-26Mirar (Pontus Hagland) static void _image_make_rgbl_color(INT32 r,INT32 g,INT32 b); static void _image_make_rgbf_color(float r,float g,float b);
e405f01999-01-24Mirar (Pontus Hagland) static void image_make_hsv_color(INT32 args); static void image_make_cmyk_color(INT32 args); static void image_make_color(INT32 args);
7a49a11999-04-10Mirar (Pontus Hagland) static void image_make_rgb_color(INT32 args);
5e94231999-01-23Mirar (Pontus Hagland) 
4d21f91999-01-24Mirar (Pontus Hagland) struct html_color { int r,g,b; char *name; struct pike_string *pname; } html_color[]= {{0,0,0,"black",NULL}, {255,255,255,"white",NULL}, {0,128,0,"green",NULL}, {192,192,192,"silver",NULL}, {0,255,0,"lime",NULL}, {128,128,128,"gray",NULL}, {128,128,0,"olive",NULL}, {255,255,0,"yellow",NULL}, {128,0,0,"maroon",NULL}, {0,0,128,"navy",NULL}, {255,0,0,"red",NULL}, {0,0,255,"blue",NULL}, {128,0,128,"purple",NULL}, {0,128,128,"teal",NULL},
cded6a1999-01-26Mirar (Pontus Hagland)  {255,0,255,"fuchsia",NULL}, {0,255,255,"aqua",NULL}};
4d21f91999-01-24Mirar (Pontus Hagland) 
415c0f1999-01-22Mirar (Pontus Hagland) static void make_colors(void) {
5e94231999-01-23Mirar (Pontus Hagland)  static struct color { int r,g,b; char *name; struct pike_string *pname; } c[]={
415c0f1999-01-22Mirar (Pontus Hagland) #define COLOR(name,R,G,B) \
5e94231999-01-23Mirar (Pontus Hagland)  {R,G,B,name,NULL},
415c0f1999-01-22Mirar (Pontus Hagland) #include "colors.h" #undef COLOR
5e94231999-01-23Mirar (Pontus Hagland)  }; int i; const int n=sizeof(c)/sizeof(c[0]);
415c0f1999-01-22Mirar (Pontus Hagland) 
4d21f91999-01-24Mirar (Pontus Hagland)  for (i=0; (size_t)i<sizeof(html_color)/sizeof(html_color[0]); i++) html_color[i].pname=make_shared_string(html_color[i].name);
5e94231999-01-23Mirar (Pontus Hagland)  for (i=0;i<n;i++) {
e405f01999-01-24Mirar (Pontus Hagland)  struct color_struct *cs;
5e94231999-01-23Mirar (Pontus Hagland)  push_text(c[i].name); copy_shared_string(c[i].pname,sp[-1].u.string);
e405f01999-01-24Mirar (Pontus Hagland)  push_object(clone_object(image_color_program,0)); cs=(struct color_struct*) get_storage(sp[-1].u.object,image_color_program); cs->rgb.r=(COLORTYPE)c[i].r; cs->rgb.g=(COLORTYPE)c[i].g; cs->rgb.b=(COLORTYPE)c[i].b;
cded6a1999-01-26Mirar (Pontus Hagland)  RGB_TO_RGBL(cs->rgbl,cs->rgb);
e405f01999-01-24Mirar (Pontus Hagland)  copy_shared_string(cs->name,c[i].pname);
5e94231999-01-23Mirar (Pontus Hagland)  }
415c0f1999-01-22Mirar (Pontus Hagland)  f_aggregate_mapping(n*2); colors=sp[-1].u.mapping; sp--;
5e94231999-01-23Mirar (Pontus Hagland)  for (i=0;i<n;i++) { push_int(c[i].r); push_int(c[i].g); push_int(c[i].b); f_aggregate(3); }
415c0f1999-01-22Mirar (Pontus Hagland)  f_aggregate(n); colortable=clone_object(image_colortable_program,1);
7a49a11999-04-10Mirar (Pontus Hagland)  if (!colortable) fatal("couldn't create colortable\n");
415c0f1999-01-22Mirar (Pontus Hagland) 
7a49a11999-04-10Mirar (Pontus Hagland)  push_int(12); push_int(12); push_int(12);
415c0f1999-01-22Mirar (Pontus Hagland)  push_int(1); safe_apply(colortable,"cubicles",4); pop_stack();
5e94231999-01-23Mirar (Pontus Hagland)  for (i=0;i<n;i++) push_string(c[i].pname); f_aggregate(n);
415c0f1999-01-22Mirar (Pontus Hagland)  colornames=sp[-1].u.array; sp--; } #ifdef THIS #undef THIS /* Needed for NT */ #endif #define THIS ((struct color_struct*)(fp->current_storage)) #define THISOBJ (fp->current_object)
e405f01999-01-24Mirar (Pontus Hagland) static void init_color_struct(struct object *dummy)
415c0f1999-01-22Mirar (Pontus Hagland) { THIS->rgb.r=THIS->rgb.g=THIS->rgb.b=0; THIS->name=NULL; }
e405f01999-01-24Mirar (Pontus Hagland) static void exit_color_struct(struct object *dummy)
415c0f1999-01-22Mirar (Pontus Hagland) { if (THIS->name) { free_string(THIS->name); THIS->name=NULL; } }
7a49a11999-04-10Mirar (Pontus Hagland) void _img_nct_map_to_flat_cubicles(rgb_group *s, rgb_group *d, int n, struct neo_colortable *nct, struct nct_dither *dith, int rowlen);
e405f01999-01-24Mirar (Pontus Hagland) static void try_find_name(struct color_struct *this)
415c0f1999-01-22Mirar (Pontus Hagland) { rgb_group d;
2d87fb1999-04-12Mirar (Pontus Hagland)  static struct nct_dither dith = { NCTD_NONE,NULL,NULL,NULL,NULL,-1 };
415c0f1999-01-22Mirar (Pontus Hagland)  if (!colors) make_colors();
e405f01999-01-24Mirar (Pontus Hagland)  if (this->name)
7a49a11999-04-10Mirar (Pontus Hagland)  fatal("try_find_name called twice\n");
415c0f1999-01-22Mirar (Pontus Hagland) 
cded6a1999-01-26Mirar (Pontus Hagland)  if (this->rgbl.r!=COLOR_TO_COLORL(this->rgb.r) || this->rgbl.g!=COLOR_TO_COLORL(this->rgb.g) || this->rgbl.b!=COLOR_TO_COLORL(this->rgb.b))
7a49a11999-04-10Mirar (Pontus Hagland)  { copy_shared_string(this->name,no_name);
cded6a1999-01-26Mirar (Pontus Hagland)  return;
7a49a11999-04-10Mirar (Pontus Hagland)  }
cded6a1999-01-26Mirar (Pontus Hagland) 
7a49a11999-04-10Mirar (Pontus Hagland)  _img_nct_map_to_flat_cubicles(&(this->rgb),&d,1, (struct neo_colortable*)colortable->storage, &dith,1);
415c0f1999-01-22Mirar (Pontus Hagland) 
e405f01999-01-24Mirar (Pontus Hagland)  if (d.r==this->rgb.r && d.g==this->rgb.g && d.b==this->rgb.b)
415c0f1999-01-22Mirar (Pontus Hagland)  { unsigned short d2; image_colortable_index_16bit_image( (struct neo_colortable*)colortable->storage,
e405f01999-01-24Mirar (Pontus Hagland)  &(this->rgb),&d2,1,1);
415c0f1999-01-22Mirar (Pontus Hagland)  if (d2<colornames->size) {
e405f01999-01-24Mirar (Pontus Hagland)  copy_shared_string(this->name,
415c0f1999-01-22Mirar (Pontus Hagland)  colornames->item[d2].u.string);
7a49a11999-04-10Mirar (Pontus Hagland)  return;
415c0f1999-01-22Mirar (Pontus Hagland)  } }
7a49a11999-04-10Mirar (Pontus Hagland)  copy_shared_string(this->name,no_name);
415c0f1999-01-22Mirar (Pontus Hagland) }
5e94231999-01-23Mirar (Pontus Hagland) /* **! method void create(int r,int g,int b)
448c201999-04-13Mirar (Pontus Hagland) **! This is the main <ref>Image.Color.Color</ref> creation
5e94231999-01-23Mirar (Pontus Hagland) **! method, mostly for internal use. **----- internal note: it takes a fourth argument, name of color --- **! */ /* **! method array(int) rgb() **! method array(int) hsv()
2f5efe1999-01-24Mirar (Pontus Hagland) **! method array(int) cmyk()
5e94231999-01-23Mirar (Pontus Hagland) **! method int greylevel() **! method int greylevel(int r, int g, int b) **! This is methods of getting information from an
448c201999-04-13Mirar (Pontus Hagland) **! <ref>Image.Color.Color</ref> object.
5e94231999-01-23Mirar (Pontus Hagland) **!
2f5efe1999-01-24Mirar (Pontus Hagland) **! They give an array of **! red, green and blue (rgb) values (color value),<br> **! hue, saturation and value (hsv) values (range as color value), <br> **! cyan, magenta, yellow, black (cmyk) values (in percent) <br> **! or the greylevel value (range as color value).
5e94231999-01-23Mirar (Pontus Hagland) **! **! The greylevel is calculated by weighting red, green **! and blue. Default weights are 87, 127 and 41, respective, **! and could be given by argument. **! **! returns array(int) respective int
448c201999-04-13Mirar (Pontus Hagland) **! see also: Image.Color.Color, grey
5e94231999-01-23Mirar (Pontus Hagland) */
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_rgb(INT32 args)
415c0f1999-01-22Mirar (Pontus Hagland) { pop_n_elems(args); push_int(THIS->rgb.r); push_int(THIS->rgb.g); push_int(THIS->rgb.b); f_aggregate(3); }
7a49a11999-04-10Mirar (Pontus Hagland) static void image_color_rgbf(INT32 args) { pop_n_elems(args); push_float(COLORL_TO_FLOAT(THIS->rgbl.r)); push_float(COLORL_TO_FLOAT(THIS->rgbl.g)); push_float(COLORL_TO_FLOAT(THIS->rgbl.b)); f_aggregate(3); }
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_greylevel(INT32 args)
5e94231999-01-23Mirar (Pontus Hagland) { INT32 r,g,b; if (args==0) { r=87; g=127; b=41; } else {
448c201999-04-13Mirar (Pontus Hagland)  get_all_args("Image.Color.Color->greylevel()",args,"%i%i%i",&r,&g,&b);
5e94231999-01-23Mirar (Pontus Hagland)  } pop_n_elems(args); if (r+g+b==0) r=g=b=1; push_int((r*THIS->rgb.r+g*THIS->rgb.g+b*THIS->rgb.b)/(r+g+b)); } #define MAX3(X,Y,Z) MAXIMUM(MAXIMUM(X,Y),Z)
4f45891999-05-20Mirar (Pontus Hagland) #define MIN3(X,Y,Z) MINIMUM(MINIMUM(X,Y),Z)
5e94231999-01-23Mirar (Pontus Hagland) 
cded6a1999-01-26Mirar (Pontus Hagland) static void image_color_hsvf(INT32 args)
5e94231999-01-23Mirar (Pontus Hagland) { float max, min; float r,g,b, delta; float h, s, v; pop_n_elems(args); if((THIS->rgb.r==THIS->rgb.g) && (THIS->rgb.g==THIS->rgb.b)) {
4f45891999-05-20Mirar (Pontus Hagland)  push_float(0.0); push_float(0.0);
cded6a1999-01-26Mirar (Pontus Hagland)  push_float(COLORL_TO_FLOAT(THIS->rgbl.r));
5e94231999-01-23Mirar (Pontus Hagland)  f_aggregate(3); return; }
cded6a1999-01-26Mirar (Pontus Hagland)  r = COLORL_TO_FLOAT(THIS->rgbl.r); g = COLORL_TO_FLOAT(THIS->rgbl.g); b = COLORL_TO_FLOAT(THIS->rgbl.b);
4f45891999-05-20Mirar (Pontus Hagland) 
5e94231999-01-23Mirar (Pontus Hagland)  max = MAX3(r,g,b);
4f45891999-05-20Mirar (Pontus Hagland)  min = MIN3(r,g,b);
5e94231999-01-23Mirar (Pontus Hagland)  v = max; if(max != 0.0) s = (max - min)/max; else error("internal error, max==0.0\n"); delta = max-min; if(r==max) h = (g-b)/delta; else if(g==max) h = 2+(b-r)/delta; else /*if(b==max)*/ h = 4+(r-g)/delta;
b411f71999-04-25Henrik Grubbström (Grubba)  h *= 60; /* now in degrees. */
5e94231999-01-23Mirar (Pontus Hagland)  if(h<0) h+=360;
cded6a1999-01-26Mirar (Pontus Hagland)  push_float(h); push_float(s); push_float(v); f_aggregate(3); } static void image_color_hsv(INT32 args) { float h,s,v; image_color_hsvf(args); h=sp[-1].u.array->item[0].u.float_number; s=sp[-1].u.array->item[1].u.float_number; v=sp[-1].u.array->item[2].u.float_number; pop_stack(); push_int(FLOAT_TO_COLOR(h/360.0)); push_int(FLOAT_TO_COLOR(s)); push_int(FLOAT_TO_COLOR(v));
5e94231999-01-23Mirar (Pontus Hagland)  f_aggregate(3); }
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_cmyk(INT32 args)
2f5efe1999-01-24Mirar (Pontus Hagland) { float c,m,y,k;
cded6a1999-01-26Mirar (Pontus Hagland)  float r,g,b;
2f5efe1999-01-24Mirar (Pontus Hagland)  pop_n_elems(args);
cded6a1999-01-26Mirar (Pontus Hagland)  r=COLORL_TO_FLOAT(THIS->rgbl.r); g=COLORL_TO_FLOAT(THIS->rgbl.g); b=COLORL_TO_FLOAT(THIS->rgbl.b); k=1.0-MAX3(r,g,b);
2f5efe1999-01-24Mirar (Pontus Hagland) 
cded6a1999-01-26Mirar (Pontus Hagland)  c=1.0-r-k; m=1.0-g-k; y=1.0-b-k;
2f5efe1999-01-24Mirar (Pontus Hagland) 
cded6a1999-01-26Mirar (Pontus Hagland)  push_float(c*100.0); push_float(m*100.0); push_float(y*100.0); push_float(k*100.0);
2f5efe1999-01-24Mirar (Pontus Hagland)  f_aggregate(4); }
5e94231999-01-23Mirar (Pontus Hagland) /* **! method object grey() **! method object grey(int red,int green,int blue) **! Gives a new color, containing a grey color, **! which is calculated by the <ref>greylevel</ref> method.
448c201999-04-13Mirar (Pontus Hagland) **! returns a new <ref>Image.Color.Color</ref> object
5e94231999-01-23Mirar (Pontus Hagland) **! see also: greylevel */
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_grey(INT32 args)
5e94231999-01-23Mirar (Pontus Hagland) { image_color_greylevel(args); stack_dup(); stack_dup();
e405f01999-01-24Mirar (Pontus Hagland)  image_make_rgb_color(3);
5e94231999-01-23Mirar (Pontus Hagland) } /*
4d21f91999-01-24Mirar (Pontus Hagland) **! method string hex() **! method string hex(int n)
5e94231999-01-23Mirar (Pontus Hagland) **! method string name()
4d21f91999-01-24Mirar (Pontus Hagland) **! method string html() **! Information methods. **! **! <ref>hex</ref>() simply gives a string on the <tt>#rrggbb</tt> **! format. If <tt>n</tt> is given, the number of significant **! digits is set to this number. **! (Ie, <tt>n=3</tt> gives <tt>#rrrgggbbb</tt>.) **! **! <ref>name</ref>() is a simplified method; **! if the color exists in the database, the name is returned, **! per default is the <ref>hex</ref>() method use. **! **! <ref>html</ref>() gives the <tt>HTML</tt> name of **! the color, or the <ref>hex</ref>(2) if it isn't one **! of the 16 <tt>HTML</tt> colors. **!
448c201999-04-13Mirar (Pontus Hagland) **! returns a new <ref>Image.Color.Color</ref> object **! see also: rgb, hsv, Image.Color
5e94231999-01-23Mirar (Pontus Hagland) */
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_hex(INT32 args)
415c0f1999-01-22Mirar (Pontus Hagland) {
4d21f91999-01-24Mirar (Pontus Hagland)  char buf[80]; INT32 i=sizeof(COLORTYPE)*2; if (args)
448c201999-04-13Mirar (Pontus Hagland)  get_all_args("Image.Color.Color->hex()",args,"%i",&i);
4d21f91999-01-24Mirar (Pontus Hagland)  pop_n_elems(args); if (i<1)
415c0f1999-01-22Mirar (Pontus Hagland)  {
4d21f91999-01-24Mirar (Pontus Hagland)  push_text("#"); /* stupid */ return;
415c0f1999-01-22Mirar (Pontus Hagland)  }
4d21f91999-01-24Mirar (Pontus Hagland)  else if (i!=sizeof(COLORTYPE)*2)
415c0f1999-01-22Mirar (Pontus Hagland)  {
4d21f91999-01-24Mirar (Pontus Hagland)  int sh; if (i>8) i=8; sh=4*(sizeof(COLORTYPE)*2-i); if (sh>0) sprintf(buf,"#%0*x%0*x%0*x",i,THIS->rgb.r>>sh, i,THIS->rgb.g>>sh,i,THIS->rgb.b>>sh); else {
cded6a1999-01-26Mirar (Pontus Hagland)  unsigned INT32 r=THIS->rgbl.r; unsigned INT32 g=THIS->rgbl.g; unsigned INT32 b=THIS->rgbl.b; sh=COLORLBITS-i*4; if (sh<0) { r=(r<<-sh)+(r>>(COLORLBITS+sh)); g=(g<<-sh)+(g>>(COLORLBITS+sh)); b=(b<<-sh)+(b>>(COLORLBITS+sh)); sh=0; } sprintf(buf,"#%0*x%0*x%0*x", i,r>>sh,i,g>>sh,i,b>>sh);
4d21f91999-01-24Mirar (Pontus Hagland)  } } else
cded6a1999-01-26Mirar (Pontus Hagland)  switch (sizeof(COLORTYPE)) /* constant */
415c0f1999-01-22Mirar (Pontus Hagland)  { case 1: sprintf(buf,"#%02x%02x%02x",THIS->rgb.r,THIS->rgb.g,THIS->rgb.b); break; case 2: sprintf(buf,"#%04x%04x%04x",THIS->rgb.r,THIS->rgb.g,THIS->rgb.b); break; case 4: sprintf(buf,"#%08x%08x%08x",THIS->rgb.r,THIS->rgb.g,THIS->rgb.b); break;
4d21f91999-01-24Mirar (Pontus Hagland)  default: error("unknown size of colortype\n");
415c0f1999-01-22Mirar (Pontus Hagland)  }
4d21f91999-01-24Mirar (Pontus Hagland)  push_text(buf); }
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_html(INT32 args)
4d21f91999-01-24Mirar (Pontus Hagland) { int i; if (!colors) make_colors(); pop_n_elems(args); for (i=0; (size_t)i<sizeof(html_color)/sizeof(html_color[0]); i++) if (THIS->rgb.r==html_color[i].r && THIS->rgb.g==html_color[i].g && THIS->rgb.b==html_color[i].b) { ref_push_string(html_color[i].pname); return; } push_int(2); image_color_hex(1); }
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_name(INT32 args)
4d21f91999-01-24Mirar (Pontus Hagland) { pop_n_elems(args);
7a49a11999-04-10Mirar (Pontus Hagland)  if (!THIS->name) try_find_name(THIS); if (THIS->name==no_name)
4d21f91999-01-24Mirar (Pontus Hagland)  image_color_hex(0);
7a49a11999-04-10Mirar (Pontus Hagland)  else ref_push_string(THIS->name);
415c0f1999-01-22Mirar (Pontus Hagland) }
5e94231999-01-23Mirar (Pontus Hagland) /* **! method array|string cast() **! cast the object to an array, representing red, green **! and blue (equal to <tt>-><ref>rgb</ref>()</tt>), or **! to a string, giving the name (equal to <tt>-><ref>name</ref>()</tt>). **! returns the name as string or rgb as array **! see also: rgb, name */
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_cast(INT32 args)
415c0f1999-01-22Mirar (Pontus Hagland) { if (args!=1 || sp[-1].type!=T_STRING)
448c201999-04-13Mirar (Pontus Hagland)  error("Image.Color.Color->cast(): Illegal argument(s)\n");
415c0f1999-01-22Mirar (Pontus Hagland)  if (sp[-1].u.string==str_array) { image_color_rgb(args); return; } if (sp[-1].u.string==str_string) { image_color_name(args); return; }
448c201999-04-13Mirar (Pontus Hagland)  error("Image.Color.Color->cast(): Can't cast to that\n");
415c0f1999-01-22Mirar (Pontus Hagland) }
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_index(INT32 args)
415c0f1999-01-22Mirar (Pontus Hagland) {
5e94231999-01-23Mirar (Pontus Hagland)  struct svalue s; if (args!=1)
448c201999-04-13Mirar (Pontus Hagland)  error("Image.Color[]: illegal number of arguments\n");
5e94231999-01-23Mirar (Pontus Hagland)  object_index_no_free2(&s,THISOBJ,sp-1); if (s.type==T_INT && sp[-1].type==T_STRING) { if (sp[-1].u.string==str_r) { pop_stack(); push_int(THIS->rgb.r); return; } if (sp[-1].u.string==str_g) { pop_stack(); push_int(THIS->rgb.g); return; } if (sp[-1].u.string==str_b) { pop_stack(); push_int(THIS->rgb.b); return; } if (sp[-1].u.string==str_h) { pop_stack(); image_color_hsv(0); push_int(0); f_index(2); return; } if (sp[-1].u.string==str_s) { pop_stack(); image_color_hsv(0); push_int(1); f_index(2); return; } if (sp[-1].u.string==str_v) { pop_stack(); image_color_hsv(0); push_int(2); f_index(2); return; } } pop_stack(); *(sp++)=s; } /*
4d21f91999-01-24Mirar (Pontus Hagland) **! method int `==(object other_color) **! method int `==(array(int) rgb) **! method int `==(int greylevel) **! method int `==(string name) **! Compares this object to another color, **! or color name. Example: **! <pre>
448c201999-04-13Mirar (Pontus Hagland) **! object red=Image.Color.red; **! object other=Image.Color. ...; **! object black=Image.Color.black;
4d21f91999-01-24Mirar (Pontus Hagland) **! **! if (red==other) ... **! if (red==({255,0,0})) ... **! if (black==0) ... **! if (red=="red") ... **! </pre> **! **! returns 1 or 0 **! see also: rgb, grey, name **! note: **! The other datatype (not color object) must be to the right!
5e94231999-01-23Mirar (Pontus Hagland) */
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_equal(INT32 args)
5e94231999-01-23Mirar (Pontus Hagland) { if (args!=1)
448c201999-04-13Mirar (Pontus Hagland)  error("Image.Color.Color->`==: illegal number of arguments");
5e94231999-01-23Mirar (Pontus Hagland)  if (sp[-1].type==T_OBJECT) { struct color_struct *other; other=(struct color_struct*) get_storage(sp[-1].u.object,image_color_program); if (other&&
cded6a1999-01-26Mirar (Pontus Hagland)  other->rgbl.r==THIS->rgbl.r && other->rgbl.g==THIS->rgbl.g && other->rgbl.b==THIS->rgbl.b)
5e94231999-01-23Mirar (Pontus Hagland)  { pop_stack(); push_int(1); return; } } else if (sp[-1].type==T_ARRAY) { if (sp[-1].u.array->size==3 && sp[-1].u.array->item[0].type==T_INT && sp[-1].u.array->item[1].type==T_INT && sp[-1].u.array->item[2].type==T_INT && sp[-1].u.array->item[0].u.integer == THIS->rgb.r &&
9226111999-05-24Mirar (Pontus Hagland)  sp[-1].u.array->item[1].u.integer == THIS->rgb.g && sp[-1].u.array->item[2].u.integer == THIS->rgb.b)
5e94231999-01-23Mirar (Pontus Hagland)  { pop_stack(); push_int(1); return; } } else if (sp[-1].type==T_INT) { if (sp[-1].u.integer == THIS->rgb.r && THIS->rgb.r==THIS->rgb.g && THIS->rgb.r==THIS->rgb.b) { pop_stack(); push_int(1); return; } }
4d21f91999-01-24Mirar (Pontus Hagland)  else if (sp[-1].type==T_STRING) {
7a49a11999-04-10Mirar (Pontus Hagland)  if (!THIS->name) try_find_name(THIS); if (sp[-1].u.string==THIS->name && THIS->name!=no_name)
4d21f91999-01-24Mirar (Pontus Hagland)  { pop_stack(); push_int(1); return; } }
5e94231999-01-23Mirar (Pontus Hagland)  pop_stack(); push_int(0); }
2d87fb1999-04-12Mirar (Pontus Hagland) static void image_color___hash(INT32 args) { pop_n_elems(args); push_int(((THIS->rgb.r<<16)+(THIS->rgb.g<<8)+THIS->rgb.b) +(THIS->rgbl.r+THIS->rgbl.g+THIS->rgbl.b)); }
5e94231999-01-23Mirar (Pontus Hagland) 
4d21f91999-01-24Mirar (Pontus Hagland) /* **! method object light() **! method object dark() **! method object neon() **! method object bright() **! method object dull() **! Color modification methods. These returns **! a new color. **! <table> **! <tr><th>method</th><th width=50%>effect</th> **! <th>h</th><th>s</th><th>v</th><th>as</th></tr>
7428421999-01-24Mirar (Pontus Hagland) **! <tr><td>light </td><td>raise light level</td><td>±0</td><td> ±0</td><td>+50</td>
448c201999-04-13Mirar (Pontus Hagland) **! <td><illustration>return Image(20,20,@(array)Color["#693e3e"])</illustration> **! <illustration>return Image(20,20,@(array)Color["#693e3e"]->light())</illustration> **! <illustration>return Image(20,20,@(array)Color["#693e3e"]->light()->light())</illustration> **! <illustration>return Image(20,20,@(array)Color["#693e3e"]->light()->light()->light())</illustration></td></tr>
4d21f91999-01-24Mirar (Pontus Hagland) **!
7428421999-01-24Mirar (Pontus Hagland) **! <tr><td>dark </td><td>lower light level</td><td>±0</td><td> ±0</td><td>-50</td>
448c201999-04-13Mirar (Pontus Hagland) **! <td><illustration>return Image(20,20,@(array)Color["#693e3e"])</illustration> **! <illustration>return Image(20,20,@(array)Color["#693e3e"]->dark())</illustration> **! <illustration>return Image(20,20,@(array)Color["#693e3e"]->dark()->dark())</illustration> **! <illustration>return Image(20,20,@(array)Color["#693e3e"]->dark()->dark()->dark())</illustration></td></tr>
4d21f91999-01-24Mirar (Pontus Hagland) **!
7428421999-01-24Mirar (Pontus Hagland) **! <tr><td>bright</td><td>brighter color </td><td>±0</td><td>+50</td><td>+50</td>
448c201999-04-13Mirar (Pontus Hagland) **! <td><illustration>return Image(20,20,@(array)Color["#693e3e"])</illustration> **! <illustration>return Image(20,20,@(array)Color["#693e3e"]->bright())</illustration> **! <illustration>return Image(20,20,@(array)Color["#693e3e"]->bright()->bright())</illustration> **! <illustration>return Image(20,20,@(array)Color["#693e3e"]->bright()->bright()->bright())</illustration></td></tr>
4d21f91999-01-24Mirar (Pontus Hagland) **!
7428421999-01-24Mirar (Pontus Hagland) **! <tr><td>dull </td><td>greyer color </td><td>±0</td><td>-50</td><td>-50</td>
448c201999-04-13Mirar (Pontus Hagland) **! <td><illustration>return Image(20,20,@(array)Color.red)</illustration> **! <illustration>return Image(20,20,@(array)Color.red->dull())</illustration> **! <illustration>return Image(20,20,@(array)Color.red->dull()->dull())</illustration> **! <illustration>return Image(20,20,@(array)Color.red->dull()->dull()->dull())</illustration></td></tr>
4d21f91999-01-24Mirar (Pontus Hagland) **!
7428421999-01-24Mirar (Pontus Hagland) **! <tr><td>neon </td><td>set to extreme </td><td>±0</td><td>max</td><td>max</td>
448c201999-04-13Mirar (Pontus Hagland) **! <td><illustration>return Image(20,20,@(array)Color["#693e3e"])</illustration> **! <illustration>return Image(20,20,@(array)Color["#693e3e"]->neon())</illustration></td></tr>
4d21f91999-01-24Mirar (Pontus Hagland) **! **! </table>
4f45891999-05-20Mirar (Pontus Hagland) **! **! <ref>light</ref> and <ref>dark</ref> lower/highers saturation **! when value is min-/maximised respective. **!
4d21f91999-01-24Mirar (Pontus Hagland) **! returns the new color object **! note: **! The opposites may not always take each other out. **! The color is maximised at white and black levels, **! so, for instance
448c201999-04-13Mirar (Pontus Hagland) **! <ref>Image.Color</ref>.white-><ref>light</ref>()-><ref>dark</ref>()
4d21f91999-01-24Mirar (Pontus Hagland) **! doesn't give the white color back, but the equal to
448c201999-04-13Mirar (Pontus Hagland) **! <ref>Image.Color</ref>.white-><ref>dark</ref>(), since
4d21f91999-01-24Mirar (Pontus Hagland) **! white can't get any <ref>light</ref>er. */
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_light(INT32 args)
5e94231999-01-23Mirar (Pontus Hagland) { pop_n_elems(args);
cded6a1999-01-26Mirar (Pontus Hagland)  image_color_hsvf(0);
5e94231999-01-23Mirar (Pontus Hagland)  sp--; push_array_items(sp->u.array); /* frees */
cded6a1999-01-26Mirar (Pontus Hagland)  sp[-1].u.float_number+=+0.2;
4f45891999-05-20Mirar (Pontus Hagland)  if (sp[-1].u.float_number>=1.0) sp[-2].u.float_number-=sp[-1].u.float_number-1.0;
5e94231999-01-23Mirar (Pontus Hagland)  image_make_hsv_color(3); }
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_dark(INT32 args)
5e94231999-01-23Mirar (Pontus Hagland) { pop_n_elems(args);
cded6a1999-01-26Mirar (Pontus Hagland)  image_color_hsvf(0);
5e94231999-01-23Mirar (Pontus Hagland)  sp--; push_array_items(sp->u.array); /* frees */
cded6a1999-01-26Mirar (Pontus Hagland)  sp[-1].u.float_number-=0.2;
4f45891999-05-20Mirar (Pontus Hagland)  if (sp[-1].u.float_number<0.0) sp[-2].u.float_number-=sp[-1].u.float_number;
5e94231999-01-23Mirar (Pontus Hagland)  image_make_hsv_color(3); }
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_neon(INT32 args)
5e94231999-01-23Mirar (Pontus Hagland) { pop_n_elems(args);
cded6a1999-01-26Mirar (Pontus Hagland)  image_color_hsvf(0);
5e94231999-01-23Mirar (Pontus Hagland)  sp--; push_array_items(sp->u.array); /* frees */
cded6a1999-01-26Mirar (Pontus Hagland)  if (sp[-1].u.float_number==0.0 || sp[-2].u.float_number==0.0) { if (sp[-2].u.float_number<0.5) sp[-2].u.float_number=0.0; else sp[-2].u.float_number=1.0; } else { sp[-1].u.float_number=1.0; sp[-2].u.float_number=1.0; }
5e94231999-01-23Mirar (Pontus Hagland)  image_make_hsv_color(3); }
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_dull(INT32 args)
5e94231999-01-23Mirar (Pontus Hagland) { pop_n_elems(args);
cded6a1999-01-26Mirar (Pontus Hagland)  image_color_hsvf(0);
5e94231999-01-23Mirar (Pontus Hagland)  sp--; push_array_items(sp->u.array); /* frees */
cded6a1999-01-26Mirar (Pontus Hagland)  if (sp[-1].u.float_number==0.0) { pop_n_elems(3); ref_push_object(THISOBJ); return; } sp[-2].u.float_number-=0.2;
4f45891999-05-20Mirar (Pontus Hagland)  sp[-1].u.float_number-=0.2;
5e94231999-01-23Mirar (Pontus Hagland)  image_make_hsv_color(3); }
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_bright(INT32 args)
5e94231999-01-23Mirar (Pontus Hagland) { pop_n_elems(args);
cded6a1999-01-26Mirar (Pontus Hagland)  image_color_hsvf(0);
5e94231999-01-23Mirar (Pontus Hagland)  sp--; push_array_items(sp->u.array); /* frees */
cded6a1999-01-26Mirar (Pontus Hagland)  if (sp[-1].u.float_number==0.0) { pop_n_elems(3); ref_push_object(THISOBJ); return; } sp[-2].u.float_number+=0.2;
4f45891999-05-20Mirar (Pontus Hagland)  sp[-1].u.float_number+=0.2;
5e94231999-01-23Mirar (Pontus Hagland)  image_make_hsv_color(3);
415c0f1999-01-22Mirar (Pontus Hagland) }
e405f01999-01-24Mirar (Pontus Hagland)  static void image_color_mult(INT32 args) { float x=0.0;
448c201999-04-13Mirar (Pontus Hagland)  get_all_args("Image.Color.Color->`*",args,"%f",&x);
e405f01999-01-24Mirar (Pontus Hagland)  pop_n_elems(args); _image_make_rgb_color((int)(THIS->rgb.r*x), (int)(THIS->rgb.g*x), (int)(THIS->rgb.b*x)); }
7a49a11999-04-10Mirar (Pontus Hagland) int image_color_svalue(struct svalue *v,rgb_group *rgb)
e405f01999-01-24Mirar (Pontus Hagland) {
7a49a11999-04-10Mirar (Pontus Hagland)  if (v->type==T_OBJECT)
e405f01999-01-24Mirar (Pontus Hagland)  { struct color_struct *cs=(struct color_struct*)
7a49a11999-04-10Mirar (Pontus Hagland)  get_storage(v->u.object,image_color_program);
e405f01999-01-24Mirar (Pontus Hagland)  if (cs) { *rgb=cs->rgb; return 1; } }
7a49a11999-04-10Mirar (Pontus Hagland)  else if (v->type==T_ARRAY)
e405f01999-01-24Mirar (Pontus Hagland)  {
7a49a11999-04-10Mirar (Pontus Hagland)  if (v->u.array->size==3 && v->u.array->item[0].type==T_INT && v->u.array->item[1].type==T_INT && v->u.array->item[2].type==T_INT)
e405f01999-01-24Mirar (Pontus Hagland)  {
7a49a11999-04-10Mirar (Pontus Hagland)  rgb->r=(COLORTYPE)(v->u.array->item[0].u.integer); rgb->g=(COLORTYPE)(v->u.array->item[1].u.integer); rgb->b=(COLORTYPE)(v->u.array->item[2].u.integer);
e405f01999-01-24Mirar (Pontus Hagland)  return 1; } }
7a49a11999-04-10Mirar (Pontus Hagland)  else if (v->type==T_STRING)
e405f01999-01-24Mirar (Pontus Hagland)  {
7a49a11999-04-10Mirar (Pontus Hagland)  push_svalue(v);
e405f01999-01-24Mirar (Pontus Hagland)  image_make_color(1); if (sp[-1].type==T_OBJECT) { struct color_struct *cs=(struct color_struct*)
53371b1999-05-24Mirar (Pontus Hagland)  get_storage(sp[-1].u.object,image_color_program);
e405f01999-01-24Mirar (Pontus Hagland)  *rgb=cs->rgb; pop_stack(); return 1; } pop_stack(); }
cded6a1999-01-26Mirar (Pontus Hagland)  return 0;
e405f01999-01-24Mirar (Pontus Hagland) }
7a49a11999-04-10Mirar (Pontus Hagland) int image_color_arg(INT32 args,rgb_group *rgb) {
4435801999-04-19Mirar (Pontus Hagland)  if (args>=0) return 0; return image_color_svalue(sp+args,rgb);
7a49a11999-04-10Mirar (Pontus Hagland) }
e405f01999-01-24Mirar (Pontus Hagland) static void image_color_add(INT32 args) { rgb_group rgb;
4435801999-04-19Mirar (Pontus Hagland)  if (!image_color_arg(-args,&rgb)) SIMPLE_BAD_ARG_ERROR("Image.Color.Color->`+",1,"Color");
e405f01999-01-24Mirar (Pontus Hagland)  pop_n_elems(args); _image_make_rgb_color((int)(THIS->rgb.r+rgb.r), (int)(THIS->rgb.g+rgb.g), (int)(THIS->rgb.b+rgb.b)); }
415c0f1999-01-22Mirar (Pontus Hagland) #define HEXTONUM(C) \ (((C)>='0' && (C)<='9')?(C)-'0': \ ((C)>='a' && (C)<='f')?(C)-'a'+10: \ ((C)>='A' && (C)<='F')?(C)-'A'+10:-1)
e405f01999-01-24Mirar (Pontus Hagland) static void image_get_color(INT32 args)
415c0f1999-01-22Mirar (Pontus Hagland) { struct svalue s;
4d21f91999-01-24Mirar (Pontus Hagland)  int n; static char *callables[]={"light","dark","neon","dull","bright"};
415c0f1999-01-22Mirar (Pontus Hagland)  if (args!=1)
448c201999-04-13Mirar (Pontus Hagland)  error("Image.Color[]: illegal number of args");
415c0f1999-01-22Mirar (Pontus Hagland)  if (!colors) make_colors();
53371b1999-05-24Mirar (Pontus Hagland)  if (sp[-1].type==T_STRING)
415c0f1999-01-22Mirar (Pontus Hagland)  {
53371b1999-05-24Mirar (Pontus Hagland)  mapping_index_no_free(&s,colors,sp-1); if (s.type==T_OBJECT)
5e94231999-01-23Mirar (Pontus Hagland)  { pop_stack(); *(sp++)=s; return; }
53371b1999-05-24Mirar (Pontus Hagland)  else free_svalue(&s); }
5e94231999-01-23Mirar (Pontus Hagland) 
53371b1999-05-24Mirar (Pontus Hagland)  if (sp[-1].type==T_STRING && sp[-1].u.string->size_shift==0) { if (sp[-1].u.string->len>=4 && sp[-1].u.string->str[0]=='#')
415c0f1999-01-22Mirar (Pontus Hagland)  {
53371b1999-05-24Mirar (Pontus Hagland)  /* #rgb, #rrggbb, #rrrgggbbb, etc */
5e94231999-01-23Mirar (Pontus Hagland) 
53371b1999-05-24Mirar (Pontus Hagland)  unsigned long i=sp[-1].u.string->len-1,j,k,rgb[3]; unsigned char *src=sp[-1].u.string->str+1; if (!(i%3)) { i/=3; for (j=0; j<3; j++)
415c0f1999-01-22Mirar (Pontus Hagland)  {
53371b1999-05-24Mirar (Pontus Hagland)  unsigned INT32 z=0; for (k=0; k<i; k++)
415c0f1999-01-22Mirar (Pontus Hagland)  {
53371b1999-05-24Mirar (Pontus Hagland)  if (HEXTONUM(*src)==-1)
5e94231999-01-23Mirar (Pontus Hagland)  {
53371b1999-05-24Mirar (Pontus Hagland)  pop_stack(); push_int(0); sp[-1].subtype=NUMBER_UNDEFINED; return;
5e94231999-01-23Mirar (Pontus Hagland)  }
53371b1999-05-24Mirar (Pontus Hagland)  z=z*16+HEXTONUM(*src),src++; } switch (i) { case 1: z=(z*0x11111111)>>(32-COLORLBITS); break; case 2: z=(z*0x01010101)>>(32-COLORLBITS); break; case 3: z=(z*0x00100100+(z>>8))>>(32-COLORLBITS); break; case 4: case 5: case 6: case 7: case 8: if (i*4<COLORLBITS) z=(z<<(COLORLBITS-i*4))+(z>>(i*8-COLORLBITS)); else z=z>>(i*4-COLORLBITS); break;
415c0f1999-01-22Mirar (Pontus Hagland)  }
53371b1999-05-24Mirar (Pontus Hagland)  rgb[j]=z;
5e94231999-01-23Mirar (Pontus Hagland)  }
53371b1999-05-24Mirar (Pontus Hagland)  pop_n_elems(args); _image_make_rgbl_color((INT32)rgb[0], (INT32)rgb[1], (INT32)rgb[2]); return;
5e94231999-01-23Mirar (Pontus Hagland)  }
53371b1999-05-24Mirar (Pontus Hagland)  } if (sp[-1].u.string->len>=4 && sp[-1].u.string->str[0]=='@') { /* @h,s,v; h=0..359, s,v=0..100 */ stack_dup(); push_text("@%f,%f,%f\n"); f_sscanf(2); if (sp[-1].type==T_ARRAY && sp[-1].u.array->size==3)
2f5efe1999-01-24Mirar (Pontus Hagland)  {
53371b1999-05-24Mirar (Pontus Hagland)  float h,s,v; stack_swap();
2f5efe1999-01-24Mirar (Pontus Hagland)  pop_stack();
53371b1999-05-24Mirar (Pontus Hagland)  sp--; push_array_items(sp->u.array); get_all_args("Image.Color()",3,"%f%f%f",&h,&s,&v); pop_n_elems(3); push_int((INT32)(h/360.0*256.0)); push_int((INT32)(s/100.0*255.4)); push_int((INT32)(v/100.0*255.4)); image_make_hsv_color(3); return;
2f5efe1999-01-24Mirar (Pontus Hagland)  }
53371b1999-05-24Mirar (Pontus Hagland)  pop_stack(); } if (sp[-1].u.string->len>=4 && sp[-1].u.string->str[0]=='%') { /* @c,m,y,k; 0..100 */ stack_dup(); push_text("%%%f,%f,%f,%f\n"); f_sscanf(2); if (sp[-1].type==T_ARRAY && sp[-1].u.array->size==4)
2f5efe1999-01-24Mirar (Pontus Hagland)  {
53371b1999-05-24Mirar (Pontus Hagland)  stack_swap();
2f5efe1999-01-24Mirar (Pontus Hagland)  pop_stack();
53371b1999-05-24Mirar (Pontus Hagland)  sp--; push_array_items(sp->u.array); image_make_cmyk_color(4); return;
2f5efe1999-01-24Mirar (Pontus Hagland)  }
53371b1999-05-24Mirar (Pontus Hagland)  pop_stack(); } for (n=0; (size_t)n<sizeof(callables)/sizeof(callables[0]); n++) if (sp[-1].u.string->len>(INT32)strlen(callables[n]) &&
4d21f91999-01-24Mirar (Pontus Hagland)  memcmp(sp[-1].u.string->str,callables[n],strlen(callables[n]))==0)
5e94231999-01-23Mirar (Pontus Hagland)  {
4d21f91999-01-24Mirar (Pontus Hagland)  push_int(strlen(callables[n]));
5e94231999-01-23Mirar (Pontus Hagland)  push_int(1000000); f_index(3); image_get_color(1);
4d21f91999-01-24Mirar (Pontus Hagland)  if (sp[-1].type!=T_OBJECT) return; /* no way */ safe_apply(sp[-1].u.object,callables[n],0);
5e94231999-01-23Mirar (Pontus Hagland)  stack_swap(); pop_stack();
415c0f1999-01-22Mirar (Pontus Hagland)  return; }
53371b1999-05-24Mirar (Pontus Hagland)  if (sp[-1].u.string->len>=4 && sp[-1].u.string->str[0]=='g') { /* greyx; x=0..99 */ stack_dup(); push_text("grey%f\n"); f_sscanf(2); if (sp[-1].type==T_ARRAY && sp[-1].u.array->size==1)
cded6a1999-01-26Mirar (Pontus Hagland)  {
53371b1999-05-24Mirar (Pontus Hagland)  float f; f=sp[-1].u.array->item[0].u.float_number;
cded6a1999-01-26Mirar (Pontus Hagland)  pop_stack();
53371b1999-05-24Mirar (Pontus Hagland)  sp--; return;
cded6a1999-01-26Mirar (Pontus Hagland)  }
53371b1999-05-24Mirar (Pontus Hagland)  pop_stack();
415c0f1999-01-22Mirar (Pontus Hagland)  } }
53371b1999-05-24Mirar (Pontus Hagland)  /* try other stuff here */
415c0f1999-01-22Mirar (Pontus Hagland)  pop_stack();
53371b1999-05-24Mirar (Pontus Hagland)  push_int(0); sp[-1].subtype=NUMBER_UNDEFINED; return;
415c0f1999-01-22Mirar (Pontus Hagland) }
e405f01999-01-24Mirar (Pontus Hagland) static void image_guess_color(INT32 args)
4d21f91999-01-24Mirar (Pontus Hagland) { struct svalue s; if (args!=1 && sp[-args].type!=T_STRING)
448c201999-04-13Mirar (Pontus Hagland)  error("Image.Color->guess(): illegal argument(s)\n");
4d21f91999-01-24Mirar (Pontus Hagland)  f_lower_case(1); push_text(" "); o_subtract(); stack_dup(); image_get_color(1); if (sp[-1].type==T_OBJECT) { stack_swap(); pop_stack(); return; } pop_stack(); push_text("#"); stack_swap(); f_add(2); image_get_color(1); }
53371b1999-05-24Mirar (Pontus Hagland) static void image_colors_index(INT32 args) { struct svalue s; object_index_no_free2(&s,THISOBJ,sp-1); if (s.type!=T_INT) { pop_stack(); *(sp++)=s; return; } image_get_color(args); }
e405f01999-01-24Mirar (Pontus Hagland) static void image_make_color(INT32 args)
415c0f1999-01-22Mirar (Pontus Hagland) { struct svalue s; if (args==1 && sp[-args].type==T_STRING) { image_get_color(args); return; }
e405f01999-01-24Mirar (Pontus Hagland)  image_make_rgb_color(args);
415c0f1999-01-22Mirar (Pontus Hagland) }
4d21f91999-01-24Mirar (Pontus Hagland)  /* **! module Image
448c201999-04-13Mirar (Pontus Hagland) **! submodule Color
4d21f91999-01-24Mirar (Pontus Hagland) **! **! method object guess(string) **! This is equivalent to
448c201999-04-13Mirar (Pontus Hagland) **! <tt><ref>Image.Color</ref>(lower_case(str)-" ")</tt>,
4d21f91999-01-24Mirar (Pontus Hagland) **! and tries the color with a prepending '#' if no **! corresponding color is found. **! **! returns a color object or zero_type */ /* **! method object rgb(int red, int green, int blue) **! method object hsv(int hue, int saturation, int value)
2f5efe1999-01-24Mirar (Pontus Hagland) **! method object cmyk(float c,float m,float y,float k)
4d21f91999-01-24Mirar (Pontus Hagland) **! method object greylevel(int level) **! method object html(string html_color) **! Creates a new color object from given red, green and blue,
2f5efe1999-01-24Mirar (Pontus Hagland) **! hue, saturation and value, or greylevel, in color value range. **! It could also be created from <i>cmyk</i> values in percent.
4d21f91999-01-24Mirar (Pontus Hagland) **!
7428421999-01-24Mirar (Pontus Hagland) **! The <ref>html</ref>() method only understands the HTML color names, **! or the <tt>#rrggbb</tt> form. It is case insensitive.
4d21f91999-01-24Mirar (Pontus Hagland) **! **! returns the created object. */
cded6a1999-01-26Mirar (Pontus Hagland) static void _image_make_rgbl_color(INT32 r,INT32 g,INT32 b) { struct color_struct *cs; if (r<0) r=0; else if (r>COLORLMAX) r=COLORLMAX; /* >=2^31? no way... */ if (g<0) g=0; else if (g>COLORLMAX) g=COLORLMAX; if (b<0) b=0; else if (b>COLORLMAX) b=COLORLMAX; push_object(clone_object(image_color_program,0)); cs=(struct color_struct*) get_storage(sp[-1].u.object,image_color_program); cs->rgbl.r=(INT32)r; cs->rgbl.g=(INT32)g; cs->rgbl.b=(INT32)b; RGBL_TO_RGB(cs->rgb,cs->rgbl); } static void _image_make_rgbf_color(float r,float g,float b) { #define FOO(X) FLOAT_TO_COLORL((X)<0.0?0.0:(X)>1.0?1.0:(X)) _image_make_rgbl_color(FOO(r),FOO(g),FOO(b)); #undef FOO }
7a49a11999-04-10Mirar (Pontus Hagland) void _image_make_rgb_color(INT32 r,INT32 g,INT32 b)
5e94231999-01-23Mirar (Pontus Hagland) {
e405f01999-01-24Mirar (Pontus Hagland)  struct color_struct *cs;
5e94231999-01-23Mirar (Pontus Hagland) 
e405f01999-01-24Mirar (Pontus Hagland)  if (r<0) r=0; else if (r>COLORMAX) r=COLORMAX; if (g<0) g=0; else if (g>COLORMAX) g=COLORMAX; if (b<0) b=0; else if (b>COLORMAX) b=COLORMAX; push_object(clone_object(image_color_program,0)); cs=(struct color_struct*) get_storage(sp[-1].u.object,image_color_program); cs->rgb.r=(COLORTYPE)r; cs->rgb.g=(COLORTYPE)g; cs->rgb.b=(COLORTYPE)b;
cded6a1999-01-26Mirar (Pontus Hagland)  RGB_TO_RGBL(cs->rgbl,cs->rgb);
5e94231999-01-23Mirar (Pontus Hagland) }
e405f01999-01-24Mirar (Pontus Hagland) static void image_make_rgb_color(INT32 args) { INT32 r=0,g=0,b=0;
448c201999-04-13Mirar (Pontus Hagland)  get_all_args("Image.Color.rgb()",args,"%i%i%i",&r,&g,&b);
e405f01999-01-24Mirar (Pontus Hagland)  _image_make_rgb_color(r,g,b); } static void image_make_hsv_color(INT32 args)
5e94231999-01-23Mirar (Pontus Hagland) { float h,s,v; float r=0,g=0,b=0; /* to avoid warning */
cded6a1999-01-26Mirar (Pontus Hagland)  if (args && sp[-args].type==T_INT) { INT32 hi,si,vi;
448c201999-04-13Mirar (Pontus Hagland)  get_all_args("Image.Color.hsv()",args,"%i%i%i",
cded6a1999-01-26Mirar (Pontus Hagland)  &hi,&si,&vi); pop_n_elems(args); if (hi<0) hi=(hi%COLORMAX)+COLORMAX; else if (hi>COLORMAX) hi%=COLORMAX; /* repeating */ if (si<0) si=0; else if (si>COLORMAX) si=COLORMAX; if (vi<0) vi=0; else if (vi>COLORMAX) vi=COLORMAX;
5e94231999-01-23Mirar (Pontus Hagland) 
cded6a1999-01-26Mirar (Pontus Hagland)  h = (hi/((float)COLORMAX))*(360.0/60.0); s = si/((float)COLORMAX); v = vi/((float)COLORMAX); } else {
448c201999-04-13Mirar (Pontus Hagland)  get_all_args("Image.Color.hsv()",args,"%f%f%f",
cded6a1999-01-26Mirar (Pontus Hagland)  &h,&s,&v); pop_n_elems(args); if (h<0) h=360+h-(((int)h/360)*360); if (h>360.0) h-=(((int)h/360)*360); h/=60; }
5e94231999-01-23Mirar (Pontus Hagland) 
cded6a1999-01-26Mirar (Pontus Hagland)  if(s==0.0)
5e94231999-01-23Mirar (Pontus Hagland)  { r = g = b = v; } else { #define i floor(h) #define f (h-i) #define p (v * (1 - s)) #define q (v * (1 - (s * f))) #define t (v * (1 - (s * (1 -f)))) switch((int)i) {
2af7f01999-04-25Henrik Grubbström (Grubba)  case 6: /* 360 degrees. Same as 0.. */
5e94231999-01-23Mirar (Pontus Hagland)  case 0: r = v; g = t; b = p; break; case 1: r = q; g = v; b = p; break; case 2: r = p; g = v; b = t; break; case 3: r = p; g = q; b = v; break; case 4: r = t; g = p; b = v; break; case 5: r = v; g = p; b = q; break;
4f45891999-05-20Mirar (Pontus Hagland)  default: error("internal error (hue=%d <= hsv[%f,%f,%f])\n",(int)i,h,s,v);
5e94231999-01-23Mirar (Pontus Hagland)  } } #undef i #undef f #undef p #undef q #undef t
cded6a1999-01-26Mirar (Pontus Hagland)  _image_make_rgbf_color(r,g,b);
2f5efe1999-01-24Mirar (Pontus Hagland) }
e405f01999-01-24Mirar (Pontus Hagland) static void image_make_cmyk_color(INT32 args)
2f5efe1999-01-24Mirar (Pontus Hagland) { float c,m,y,k,r,g,b;
448c201999-04-13Mirar (Pontus Hagland)  get_all_args("Image.Color.cmyk()",args,"%F%F%F%F",&c,&m,&y,&k);
2f5efe1999-01-24Mirar (Pontus Hagland)  pop_n_elems(args); r=100-(c+k); g=100-(m+k); b=100-(y+k);
cded6a1999-01-26Mirar (Pontus Hagland)  _image_make_rgbf_color(r*0.01,g*0.01,b*0.01);
5e94231999-01-23Mirar (Pontus Hagland) }
e405f01999-01-24Mirar (Pontus Hagland) static void image_make_greylevel_color(INT32 args)
5e94231999-01-23Mirar (Pontus Hagland) { INT32 i;
448c201999-04-13Mirar (Pontus Hagland)  get_all_args("Image.Color.greylevel()",args,"%i",&i);
2f5efe1999-01-24Mirar (Pontus Hagland)  pop_n_elems(args);
5e94231999-01-23Mirar (Pontus Hagland) 
e405f01999-01-24Mirar (Pontus Hagland)  _image_make_rgb_color(i,i,i);
5e94231999-01-23Mirar (Pontus Hagland) }
e405f01999-01-24Mirar (Pontus Hagland) static void image_make_html_color(INT32 args)
4d21f91999-01-24Mirar (Pontus Hagland) { int i; if (args!=1 || sp[-1].type!=T_STRING) {
448c201999-04-13Mirar (Pontus Hagland)  error("Image.Color.html(): illegal arguments\n");
4d21f91999-01-24Mirar (Pontus Hagland)  return; } f_lower_case(1); for (i=0; (size_t)i<sizeof(html_color)/sizeof(html_color[0]); i++) if (html_color[i].pname==sp[-1].u.string) {
e405f01999-01-24Mirar (Pontus Hagland)  _image_make_rgb_color(html_color[i].r, html_color[i].g, html_color[i].b);
4d21f91999-01-24Mirar (Pontus Hagland)  return; } if (sp[-1].u.string->len>0 && sp[-1].u.string->str[0]=='#')
e405f01999-01-24Mirar (Pontus Hagland)  image_get_color(1);
4d21f91999-01-24Mirar (Pontus Hagland)  else { push_text("#"); stack_swap(); f_add(2);
e405f01999-01-24Mirar (Pontus Hagland)  image_get_color(1);
4d21f91999-01-24Mirar (Pontus Hagland)  } } /* **! method array(string) _indices() **! method array(object) _values()
448c201999-04-13Mirar (Pontus Hagland) **! (ie as <tt>indices(Image.Color)</tt> or <tt>values(Image.Color)</tt>)
4d21f91999-01-24Mirar (Pontus Hagland) **! <tt>indices</tt> gives a list of all the known color names, **! <tt>values</tt> gives there corresponding objects.
448c201999-04-13Mirar (Pontus Hagland) **! see also: Image.Color
4d21f91999-01-24Mirar (Pontus Hagland) */
e405f01999-01-24Mirar (Pontus Hagland) static void image_colors_indices(INT32 args)
415c0f1999-01-22Mirar (Pontus Hagland) { pop_n_elems(args);
5e94231999-01-23Mirar (Pontus Hagland)  if (!colors) make_colors();
415c0f1999-01-22Mirar (Pontus Hagland)  ref_push_mapping(colors); f_indices(1); }
e405f01999-01-24Mirar (Pontus Hagland) static void image_colors_values(INT32 args)
415c0f1999-01-22Mirar (Pontus Hagland) { pop_n_elems(args);
5e94231999-01-23Mirar (Pontus Hagland)  if (!colors) make_colors();
415c0f1999-01-22Mirar (Pontus Hagland)  ref_push_mapping(colors); f_values(1); } void init_image_colors(void) { struct program *prg; struct pike_string *str; str_array=make_shared_string("array"); str_string=make_shared_string("string"); str_r=make_shared_string("r"); str_g=make_shared_string("g"); str_b=make_shared_string("b"); str_h=make_shared_string("h"); str_s=make_shared_string("s"); str_v=make_shared_string("v");
7a49a11999-04-10Mirar (Pontus Hagland)  no_name=make_shared_string("");
8db2c31999-05-23Mirar (Pontus Hagland)  /* make color object program */
415c0f1999-01-22Mirar (Pontus Hagland)  start_new_program();
90e9781999-01-31Fredrik Hübinette (Hubbe)  ADD_STORAGE(struct color_struct);
415c0f1999-01-22Mirar (Pontus Hagland)  set_init_callback(init_color_struct); set_exit_callback(exit_color_struct);
5e94231999-01-23Mirar (Pontus Hagland)  /* color info methods */
2d87fb1999-04-12Mirar (Pontus Hagland)  ADD_FUNCTION("cast",image_color_cast,tFunc(tStr,tOr(tArray,tStr)),0); ADD_FUNCTION("`[]",image_color_index,tFunc(tOr(tStr,tInt),tOr(tInt,tFunction)),0); ADD_FUNCTION("`->",image_color_index,tFunc(tOr(tStr,tInt),tOr(tInt,tFunction)),0); ADD_FUNCTION("`==",image_color_equal,tFunc(tOr(tObj,tInt),tInt),0); ADD_FUNCTION("__hash",image_color___hash,tFunc(,tInt),0); ADD_FUNCTION("name",image_color_name,tFunc(,tStr),0); ADD_FUNCTION("hex",image_color_hex,tFunc(,tStr),0); ADD_FUNCTION("html",image_color_html,tFunc(,tStr),0); ADD_FUNCTION("rgb",image_color_rgb,tFunc(,tArr(tInt)),0); ADD_FUNCTION("rgbf",image_color_rgbf,tFunc(,tArr(tFlt)),0); ADD_FUNCTION("hsv",image_color_hsv,tFunc(,tArr(tInt)),0); ADD_FUNCTION("hsvf",image_color_hsvf,tFunc(,tArr(tFlt)),0); ADD_FUNCTION("cmyk",image_color_cmyk,tFunc(,tArr(tFlt)),0); ADD_FUNCTION("greylevel",image_color_greylevel,tOr(tFunc(,tInt),tFunc(tInt tInt tInt,tInt)),0);
5e94231999-01-23Mirar (Pontus Hagland)  /* color conversion methods */
2d87fb1999-04-12Mirar (Pontus Hagland)  ADD_FUNCTION("grey",image_color_grey, tOr(tFunc(,tObj),tFunc(tInt tInt tInt,tObj)),0); ADD_FUNCTION("light",image_color_light,tFunc(,tObj),0); ADD_FUNCTION("dark",image_color_dark,tFunc(,tObj),0); ADD_FUNCTION("neon",image_color_neon,tFunc(,tObj),0); ADD_FUNCTION("bright",image_color_bright,tFunc(,tObj),0); ADD_FUNCTION("dull",image_color_dull,tFunc(,tObj),0); ADD_FUNCTION("`*",image_color_mult,tFunc(tFlt,tObj),0); ADD_FUNCTION("`+",image_color_add,tFunc(tObj,tObj),0);
e405f01999-01-24Mirar (Pontus Hagland) 
415c0f1999-01-22Mirar (Pontus Hagland)  image_color_program=end_program();
8db2c31999-05-23Mirar (Pontus Hagland)  /* this is the Image.Color stuff */
415c0f1999-01-22Mirar (Pontus Hagland) 
53371b1999-05-24Mirar (Pontus Hagland)  ADD_FUNCTION("`[]",image_colors_index,tFunc(tStr,tObj),0); ADD_FUNCTION("`()",image_make_color, tOr(tFunc(tStr,tObj), tFunc(tInt tInt tInt,tObj)),0);
2d87fb1999-04-12Mirar (Pontus Hagland)  ADD_FUNCTION("rgb",image_make_rgb_color,tFunc(tInt tInt tInt,tObj),0); ADD_FUNCTION("hsv",image_make_hsv_color, tOr(tFunc(tInt tInt tInt,tObj), tFunc(tFlt tFlt tFlt,tObj)) ,0); ADD_FUNCTION("cmyk",image_make_cmyk_color,tFunc(tOr(tInt,tFlt) tOr(tInt,tFlt) tOr(tInt,tFlt) tOr(tInt,tFlt),tObj), 0); ADD_FUNCTION("html",image_make_html_color,tFunc(tStr,tObj),0); ADD_FUNCTION("guess",image_guess_color,tFunc(tStr,tObj),0); ADD_FUNCTION("greylevel",image_make_greylevel_color,tFunc(tInt,tObj),0); ADD_FUNCTION("_indices",image_colors_indices,tFunc(,tArr(tStr)),0); ADD_FUNCTION("_values",image_colors_values,tFunc(,tArr(tObj)),0);
5e94231999-01-23Mirar (Pontus Hagland) 
448c201999-04-13Mirar (Pontus Hagland)  add_program_constant("Color",image_color_program,0);
415c0f1999-01-22Mirar (Pontus Hagland) } void exit_image_colors(void) {
8db2c31999-05-23Mirar (Pontus Hagland)  free_program(image_color_program);
415c0f1999-01-22Mirar (Pontus Hagland)  if (colors) {
4d21f91999-01-24Mirar (Pontus Hagland)  int i;
415c0f1999-01-22Mirar (Pontus Hagland)  free_mapping(colors); free_object(colortable); free_array(colornames); colors=NULL; colortable=NULL; colornames=NULL;
4d21f91999-01-24Mirar (Pontus Hagland)  for (i=0; (size_t)i<sizeof(html_color)/sizeof(html_color[0]); i++) free_string(html_color[i].pname);
415c0f1999-01-22Mirar (Pontus Hagland)  } free_string(str_array); free_string(str_string); free_string(str_r); free_string(str_g); free_string(str_b); free_string(str_h); free_string(str_s); free_string(str_v);
4d21f91999-01-24Mirar (Pontus Hagland) 
7a49a11999-04-10Mirar (Pontus Hagland)  free_string(no_name);
415c0f1999-01-22Mirar (Pontus Hagland) }