static int
get_hex (int *start)
{
int value = convert_hex_digit (*start);
int try;
*start = readchar (timeout);
while ((try = convert_hex_digit (*start)) >= 0)
{
value <<= 4;
value += try;
*start = readchar (timeout);
}
return value;
}
#if 0
/* Get N 32-bit words from remote, each preceded by a space, and put
them in registers starting at REGNO. */
static void
get_hex_regs (int n, int regno)
{
long val;
int i;
for (i = 0; i < n; i++)
{
int j;
val = 0;
for (j = 0; j < 8; j++)
val = (val << 4) + get_hex_digit (j == 0);
supply_register (regno++, (char *) &val);
}
}
paint::paint(const std::string& s)
: color_attrib_(ColorAttrib::VALUE),
backup_color_attrib_(ColorAttrib::NONE),
opacity_(1.0)
{
if(s == "none") {
color_attrib_ = ColorAttrib::NONE;
} else if(s == "currentColor") {
color_attrib_ = ColorAttrib::CURRENT_COLOR;
} else if(s.length() > 1 && s[0] == '#') {
ASSERT_LOG(s.length() == 4 || s.length() == 7, "Expected length of color definition to be 3 or 6 characters long, found: " << s.substr(1));
if(s.length() == 4) {
int r_hex = convert_hex_digit(s[1]);
int g_hex = convert_hex_digit(s[2]);
int b_hex = convert_hex_digit(s[3]);
color_value_ = color((r_hex << 4) | r_hex, (g_hex << 4) | g_hex, (b_hex << 4) | b_hex);
} else {
color_value_ = color((convert_hex_digit(s[1]) << 4) | convert_hex_digit(s[2]),
(convert_hex_digit(s[3]) << 4) | convert_hex_digit(s[4]),
(convert_hex_digit(s[5]) << 4) | convert_hex_digit(s[6]));
}
} else if(s.length() > 3 && s.substr(0,3) == "rgb") {
boost::char_separator<char> seperators(" \n\t\r,()");
boost::tokenizer<boost::char_separator<char>> tok(s.substr(3), seperators);
int count = 0;
int cv[3];
for(auto it = tok.begin(); it != tok.end(); ++it) {
char* end = NULL;
long value = strtol(it->c_str(), &end, 10);
uint8_t col_val = 0;
if(value == 0 && end == it->c_str()) {
ASSERT_LOG(false, "Unable to parse string as an integer: " << *it);
}
if(end != NULL && *end == '%') {
ASSERT_LOG(value >= 0 && value <= 100, "Percentage values range from 0-100: " << value);
col_val = uint8_t(value / 100.0 * 255);
} else {
ASSERT_LOG(value >= 0 && value <= 255, "Percentage values range from 0-255: " << value);
col_val = uint8_t(value);
}
ASSERT_LOG(count < 3, "Too many numbers in color value");
cv[count] = col_val;
}
color_value_ = color(cv[0],cv[1],cv[2]);
} else if(s.length() > 4 && s.substr(0, 4) == "url(") {
auto st_it = std::find(s.begin(), s.end(), '(');
auto ed_it = std::find(s.begin(), s.end(), '0');
color_ref_ = uri::uri::parse(std::string(st_it, ed_it));
color_attrib_ = ColorAttrib::FUNC_IRI;
std::string backup(ed_it, s.end());
if(!backup.empty()) {
// XXX parse stuff
}
} else if(s.length() > 9 && s.substr(0,9) == "icc-color") {
boost::char_separator<char> seperators(" \n\t\r,()");
boost::tokenizer<boost::char_separator<char>> tok(s.substr(9), seperators);
auto it = tok.begin();
icc_color_name_ = *it;
for(; it != tok.end(); ++it) {
try {
double value = boost::lexical_cast<double>(*it);
icc_color_values_.emplace_back(value);
} catch(boost::bad_lexical_cast&) {
ASSERT_LOG(false, "Unable to convert icc-color value from string to numeric: " << *it << " : " << s);
}
}
color_attrib_ = ColorAttrib::ICC_COLOR;
} else {
color_value_ = color::from_name(s);
}
}
bool color_from_hex_string(const std::string& colstr, Color* value)
{
std::string s = colstr;
if(s.empty()) {
return false;
}
if(s[0] == '#') {
s = s.substr(1);
}
if(s.length() != 3 && s.length() != 6 && s.length() != 8) {
return false;
}
if(s.length() == 3) {
int r_hex = 0, g_hex = 0, b_hex = 0;
if(convert_hex_digit(s[0], &r_hex) && convert_hex_digit(s[1], &g_hex) && convert_hex_digit(s[2], &b_hex)) {
*value = Color((r_hex << 4) | r_hex, (g_hex << 4) | g_hex, (b_hex << 4) | b_hex);
return true;
}
return false;
}
int rh_hex = 0, rl_hex = 0, gh_hex = 0, gl_hex = 0, bh_hex = 0, bl_hex = 0;
if(convert_hex_digit(s[0], &rh_hex) && convert_hex_digit(s[1], &rl_hex)
&& convert_hex_digit(s[2], &gh_hex) && convert_hex_digit(s[3], &gl_hex)
&& convert_hex_digit(s[4], &bh_hex) && convert_hex_digit(s[5], &bl_hex)) {
int ah_hex = 0xf, al_hex = 0xf;
if(s.length() == 8) {
if(!convert_hex_digit(s[6], &ah_hex) || !convert_hex_digit(s[7], &al_hex)) {
return false;
}
}
*value = Color((rh_hex << 4) | rl_hex, (gh_hex << 4) | gl_hex, (bh_hex << 4) | bl_hex, (ah_hex << 4) | al_hex);
return true;
}
return false;
}
