Fl_RGB_Image *img_to_rgb(const char *file)
{
FILE *fp;
size_t len;
unsigned char bytes[8];
struct stat st;
if (!file || stat(file, &st) == -1 || st.st_size > IMGFILE_MAX) {
return NULL;
}
/* get filetype from extension */
if (HASEXT(file, ".svg")) {
if (st.st_size > SVG_MAX) {
return NULL;
}
Fl_SVG_Image *svg = new Fl_SVG_Image(file, NULL);
CHECK_IF_LOADED(svg)
return svg;
}
if (HASEXT(file, ".svgz") || HASEXT(file, ".svg.gz")) {
if (st.st_size > SVGZ_MAX) {
return NULL;
}
Fl_SVG_Image *svg = new Fl_SVG_Image(file, NULL);
CHECK_IF_LOADED(svg)
return svg;
}
if (HASEXT(file, ".xpm")) {
Fl_XPM_Image *xpm = new Fl_XPM_Image(file);
CHECK_IF_LOADED(xpm)
Fl_RGB_Image *rgb = new Fl_RGB_Image(xpm, Fl_Color(0));
delete xpm;
return rgb;
}
if (HASEXT(file, ".xbm")) {
Fl_XBM_Image *in = new Fl_XBM_Image(file);
CHECK_IF_LOADED(in)
Fl_Image_Surface *surf = new Fl_Image_Surface(in->w(), in->h());
if (!surf) {
delete in;
return NULL;
}
surf->set_current();
fl_color(FL_WHITE);
fl_rectf(0, 0, in->w(), in->h());
fl_color(FL_BLACK);
in->draw(0, 0);
Fl_RGB_Image *rgb = surf->image();
delete in;
delete surf;
return rgb;
}
/* get filetype from magic bytes */
if (!(fp = fopen(file, "r"))) {
return NULL;
}
len = fread(bytes, 1, sizeof(bytes), fp);
if (ferror(fp) || len < sizeof(bytes)) {
fclose(fp);
return NULL;
}
fclose(fp);
if (memcmp(bytes, "\211PNG\r\n\032\n", 8) == 0) {
Fl_PNG_Image *png = new Fl_PNG_Image(file);
CHECK_IF_LOADED(png)
return png;
}
void setGUIColorScheme(int colorScheme)
{
double rgamma = 1.0;
double ggamma = 1.0;
double bgamma = 1.0;
switch (colorScheme) {
case 1:
{
Fl::scheme("none");
Fl::set_color(FL_FOREGROUND_COLOR, 0, 0, 0);
Fl::set_color(FL_BACKGROUND2_COLOR, 255, 255, 255);
Fl::set_color(FL_INACTIVE_COLOR, 150, 148, 144);
Fl::set_color(FL_SELECTION_COLOR, 0, 0, 128);
Fl::set_color(Fl_Color(1), 255, 0, 0);
Fl::set_color(Fl_Color(2), 0, 0, 0);
Fl::set_color(Fl_Color(3), 0, 224, 0);
Fl::set_color(Fl_Color(6), 191, 255, 255);
rgamma = std::log(212.0 / 255.0) / std::log(16.0 / 23.0);
ggamma = std::log(208.0 / 255.0) / std::log(16.0 / 23.0);
bgamma = std::log(200.0 / 255.0) / std::log(16.0 / 23.0);
}
break;
case 2:
{
Fl::scheme("plastic");
Fl::set_color(FL_FOREGROUND_COLOR, 0, 0, 0);
Fl::set_color(FL_BACKGROUND2_COLOR, 255, 255, 255);
Fl::set_color(FL_INACTIVE_COLOR, 148, 148, 148);
Fl::set_color(FL_SELECTION_COLOR, 0, 0, 128);
Fl::set_color(Fl_Color(1), 192, 0, 0);
Fl::set_color(Fl_Color(2), 0, 0, 0);
Fl::set_color(Fl_Color(3), 255, 0, 0);
Fl::set_color(Fl_Color(6), 0, 0, 0);
rgamma = std::log(208.0 / 255.0) / std::log(16.0 / 23.0);
ggamma = std::log(208.0 / 255.0) / std::log(16.0 / 23.0);
bgamma = std::log(208.0 / 255.0) / std::log(16.0 / 23.0);
}
break;
case 3:
{
Fl::scheme("gtk+");
Fl::set_color(FL_FOREGROUND_COLOR, 0, 0, 0);
Fl::set_color(FL_BACKGROUND2_COLOR, 255, 255, 255);
Fl::set_color(FL_INACTIVE_COLOR, 195, 194, 193);
Fl::set_color(FL_SELECTION_COLOR, 169, 209, 255);
Fl::set_color(Fl_Color(1), 255, 0, 0);
Fl::set_color(Fl_Color(2), 0, 0, 0);
Fl::set_color(Fl_Color(3), 0, 224, 255);
Fl::set_color(Fl_Color(6), 191, 255, 255);
rgamma = std::log(235.0 / 255.0) / std::log(17.0 / 23.0);
ggamma = std::log(233.0 / 255.0) / std::log(17.0 / 23.0);
bgamma = std::log(232.0 / 255.0) / std::log(17.0 / 23.0);
}
break;
default:
Fl::scheme("none");
Fl::set_color(FL_FOREGROUND_COLOR, 224, 224, 224);
Fl::set_color(FL_BACKGROUND2_COLOR, 0, 0, 0);
Fl::set_color(FL_INACTIVE_COLOR, 184, 184, 184);
Fl::set_color(FL_SELECTION_COLOR, 127, 218, 255);
Fl::set_color(Fl_Color(1), 255, 0, 0);
Fl::set_color(Fl_Color(2), 128, 255, 128);
Fl::set_color(Fl_Color(3), 255, 255, 0);
Fl::set_color(Fl_Color(6), 191, 255, 255);
for (int i = 0; i < 24; i++) {
unsigned char c = colorTable[i];
Fl::set_color(Fl_Color(int(FL_GRAY_RAMP) + i), c, c, c);
}
return;
}
for (int i = 0; i < 24; i++) {
int r = int(std::pow(double(i) / 23.0, rgamma) * 255.0 + 0.5);
int g = int(std::pow(double(i) / 23.0, ggamma) * 255.0 + 0.5);
int b = int(std::pow(double(i) / 23.0, bgamma) * 255.0 + 0.5);
Fl::set_color(Fl_Color(int(FL_GRAY_RAMP) + i),
(unsigned char) r, (unsigned char) g, (unsigned char) b);
}
}
void draw() {
draw_box(FL_BORDER_BOX, 0, 0, w(), h(), Fl_Color(175));
fl_color(FL_BLACK);
fl_font(labelfont(), labelsize());
fl_draw(tip, 3, 3, w()-6, h()-6, Fl_Align(FL_ALIGN_LEFT|FL_ALIGN_WRAP));
}