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#include <FL/Fl.H>
#include <FL/Fl_Box.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_GIF_Image.H>
#include <FL/Fl_JPEG_Image.H>
#include <FL/Fl_PNG_Image.H>
#include <FL/Fl_XBM_Image.H>
#include <string.h>
enum {
ROTATE_CLOCKWISE,
ROTATE_COUNTER_CLOCKWISE,
ROTATE_180,
FLIP_VERTICAL,
FLIP_HORIZONTAL
};
// w=10,h=8,d=1,ld=15
static const uchar rgb_array[] = {
0x00,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x01,0x02,0x03,0x04,0x05, // line data
0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0x06,0x07,0x08,0x09,0x0a, // line data
0x00,0x00,0x00,0xff,0x00,0x00,0x00,0x00,0x00,0x00,
0x01,0x02,0x03,0x04,0x05, // line data
0xff,0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,
0x06,0x07,0x08,0x09,0x0a, // line data
0x00,0x00,0x00,0x00,0x00,0xff,0x00,0x00,0x00,0x00,
0x01,0x02,0x03,0x04,0x05, // line data
0xff,0xff,0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,
0x06,0x07,0x08,0x09,0x0a, // line data
0x00,0x00,0x00,0x00,0xff,0x00,0x00,0x00,0x00,0x00,
0x01,0x02,0x03,0x04,0x05, // line data
0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff,
0x06,0x07,0x08,0x09,0x0a // line data
};
static Fl_RGB_Image *modify_rgb_image(int method, Fl_RGB_Image *in)
{
int i, j, x, y, w, h, d, ld, l;
if (!in) {
return NULL;
}
w = in->w();
h = in->h();
d = in->d();
ld = in->ld();
if (d < 1 || d > 4) {
return NULL;
}
if ((ld > 0 && ld < w*d) || ld < 0) {
return NULL;
}
uchar *out = new uchar[w*h*d];
if (ld != 0) {
ld -= w*d;
}
if (d == 1) {
if (method == ROTATE_CLOCKWISE) {
for (x=0, i=0; x < w; ++x) {
for (y=h-1; y >= 0; --y, ++i) {
out[i] = in->array[y*w + y*ld + x];
}
}
return new Fl_RGB_Image(out, h, w, 1);
} else if (method == ROTATE_COUNTER_CLOCKWISE) {
for (x=w-1, i=0; x >= 0; --x) {
for (y=0; y < h; ++y, ++i) {
out[i] = in->array[y*w + y*ld + x];
}
}
return new Fl_RGB_Image(out, h, w, 1);
}
else if (method == ROTATE_180) {
if (ld == 0) {
for (i=0, l=w*h; i < l; ++i) {
out[i] = in->array[l - i];
}
} else {
for (y=h-1, i=0; y >= 0; --y, ++i) {
for (x=w-1, j=0; x >= 0; --x, ++j) {
out[i*w + j] = in->array[y*w + y*ld + x];
}
}
}
}
else if (method == FLIP_VERTICAL) {
for (y=h-1, i=0; y >= 0; --y, ++i) {
out[i*w] = in->array[y*ld + y*w];
}
}
else if (method == FLIP_HORIZONTAL) {
for (y=0; y < h; ++y) {
for (x=w-1, i=0; x >= 0; --x, ++i) {
out[i + y*w] = in->array[y*w + y*ld + x];
}
}
} else {
delete out;
return NULL;
}
} else {
if (method == ROTATE_CLOCKWISE) {
for (x=0, i=0; x < w; ++x) {
for (y=h-1; y >= 0; --y, i+=d) {
memcpy(out + i, in->array + y*w*d + y*ld + x*d, d);
}
}
return new Fl_RGB_Image(out, h, w, d);
} else if (method == ROTATE_COUNTER_CLOCKWISE) {
for (x=w-1, i=0; x >= 0; --x) {
for (y=0; y < h; ++y, i+=d) {
memcpy(out + i, in->array + y*w*d + y*ld + x*d, d);
}
}
return new Fl_RGB_Image(out, h, w, d);
}
else if (method == ROTATE_180) {
if (ld == 0) {
for (i=0, l=w*h*d; i < l; i+=d) {
memcpy(out + i, in->array + l - i - d, d);
}
} else {
for (y=h-1, i=0; y >= 0; --y, ++i) {
for (x=w-1, j=0; x >= 0; --x, j+=d) {
memcpy(out + i*w*d + j, in->array + y*w*d + y*ld + x*d, d);
}
}
}
}
else if (method == FLIP_VERTICAL) {
for (y=h-1, i=0, l=w*d; y >= 0; --y, ++i) {
memcpy(out + i*l, in->array + y*ld + y*l, l);
}
}
else if (method == FLIP_HORIZONTAL) {
for (y=0; y < h; ++y) {
for (x=w-1, i=0; x >= 0; --x, i+=d) {
memcpy(out + i + y*w*d, in->array + y*w*d + y*ld + x*d, d);
}
}
} else {
delete out;
return NULL;
}
}
return new Fl_RGB_Image(out, w, h, d);
}
static Fl_RGB_Image *convert_bitmap_to_rgb(Fl_Bitmap *in)
{
int w, h, x, y, i, b;
if (!in) {
return NULL;
}
w = in->w();
h = in->h();
uchar *out = new uchar[w*h];
for (y=0, i=0; y < h; ++y) {
for (x=0; x < w; x+=8, ++i) {
for (b=0; b < 8; ++b) {
out[y*w + x + b] = (0 != (in->array[i] & (1 << b))) ? 0x00 : 0xff;
}
}
}
return new Fl_RGB_Image(out, w, h, 1);
}
int main(void)
{
Fl_Double_Window *win = new Fl_Double_Window(400, 400, "Rotate Test");
Fl_Box *b1 = new Fl_Box(0, 0, win->w(), win->h()/2);
Fl_Box *b2 = new Fl_Box(0, win->h()/2 - 20, win->w(), win->h()/2);
//Fl_PNG_Image *rgb = new Fl_PNG_Image("test.png"); // d()==4
//Fl_JPEG_Image *rgb = new Fl_JPEG_Image("test.jpg"); // d()==3
//Fl_RGB_Image *rgb = new Fl_RGB_Image(rgb_array, 10, 8, 1, 15);
Fl_XBM_Image *xbm = new Fl_XBM_Image("srs.xbm");
Fl_RGB_Image *rgb = convert_bitmap_to_rgb(xbm);
delete xbm;
//Fl_GIF_Image *gif = new Fl_GIF_Image("test.gif");
//Fl_RGB_Image *rgb = new Fl_RGB_Image(gif, Fl_Color(0));
//delete gif;
Fl_RGB_Image *rot = modify_rgb_image(ROTATE_COUNTER_CLOCKWISE, rgb);
int sc = 2;
if (rgb) {
b1->image(rgb->copy(rgb->w()*sc, rgb->h()*sc));
delete rgb;
}
if (rot) {
b2->image(rot->copy(rot->w()*sc, rot->h()*sc));
delete rot;
}
win->end();
win->show();
Fl::run();
return 0;
}
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