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- #include <u.h>
- #include <libc.h>
- #include <draw.h>
- #include <thread.h>
- #include <cursor.h>
- #include <mouse.h>
- #define W Borderwidth
- static Image *tmp[4];
- static Image *red;
- static Cursor sweep={
- {-7, -7},
- {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xE0, 0x07,
- 0xE0, 0x07, 0xE0, 0x07, 0xE3, 0xF7, 0xE3, 0xF7,
- 0xE3, 0xE7, 0xE3, 0xF7, 0xE3, 0xFF, 0xE3, 0x7F,
- 0xE0, 0x3F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,},
- {0x00, 0x00, 0x7F, 0xFE, 0x40, 0x02, 0x40, 0x02,
- 0x40, 0x02, 0x40, 0x02, 0x40, 0x02, 0x41, 0xE2,
- 0x41, 0xC2, 0x41, 0xE2, 0x41, 0x72, 0x40, 0x38,
- 0x40, 0x1C, 0x40, 0x0E, 0x7F, 0xE6, 0x00, 0x00,}
- };
- static
- void
- brects(Rectangle r, Rectangle rp[4])
- {
- if(Dx(r) < 2*W)
- r.max.x = r.min.x+2*W;
- if(Dy(r) < 2*W)
- r.max.y = r.min.y+2*W;
- rp[0] = Rect(r.min.x, r.min.y, r.max.x, r.min.y+W);
- rp[1] = Rect(r.min.x, r.max.y-W, r.max.x, r.max.y);
- rp[2] = Rect(r.min.x, r.min.y+W, r.min.x+W, r.max.y-W);
- rp[3] = Rect(r.max.x-W, r.min.y+W, r.max.x, r.max.y-W);
- }
- Rectangle
- getrect(int but, Mousectl *mc)
- {
- Rectangle r, rc;
- but = 1<<(but-1);
- setcursor(mc, &sweep);
- while(mc->buttons)
- readmouse(mc);
- while(!(mc->buttons & but)){
- readmouse(mc);
- if(mc->buttons & (7^but))
- goto Return;
- }
- r.min = mc->xy;
- r.max = mc->xy;
- do{
- rc = canonrect(r);
- drawgetrect(rc, 1);
- readmouse(mc);
- drawgetrect(rc, 0);
- r.max = mc->xy;
- }while(mc->buttons == but);
- Return:
- setcursor(mc, nil);
- if(mc->buttons & (7^but)){
- rc.min.x = rc.max.x = 0;
- rc.min.y = rc.max.y = 0;
- while(mc->buttons)
- readmouse(mc);
- }
- return rc;
- }
- static
- void
- freetmp(void)
- {
- freeimage(tmp[0]);
- freeimage(tmp[1]);
- freeimage(tmp[2]);
- freeimage(tmp[3]);
- freeimage(red);
- tmp[0] = tmp[1] = tmp[2] = tmp[3] = red = nil;
- }
- static
- int
- max(int a, int b)
- {
- if(a > b)
- return a;
- return b;
- }
- void
- drawgetrect(Rectangle rc, int up)
- {
- int i;
- Rectangle r, rects[4];
- /*
- * BUG: if for some reason we have two of these going on at once
- * when we must grow the tmp buffers, we lose data. Also if tmp
- * is unallocated and we ask to restore the screen, it would be nice
- * to complain, but we silently make a mess.
- */
- if(up && tmp[0]!=nil)
- if(Dx(tmp[0]->r)<Dx(rc) || Dy(tmp[2]->r)<Dy(rc))
- freetmp();
- if(tmp[0] == 0){
- r = Rect(0, 0, max(Dx(display->screenimage->r), Dx(rc)), W);
- tmp[0] = allocimage(display, r, screen->chan, 0, -1);
- tmp[1] = allocimage(display, r, screen->chan, 0, -1);
- r = Rect(0, 0, W, max(Dy(display->screenimage->r), Dy(rc)));
- tmp[2] = allocimage(display, r, screen->chan, 0, -1);
- tmp[3] = allocimage(display, r, screen->chan, 0, -1);
- red = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DRed);
- if(tmp[0]==0 || tmp[1]==0 || tmp[2]==0 || tmp[3]==0 || red==0){
- freetmp();
- drawerror(display, "getrect: allocimage failed");
- }
- }
- brects(rc, rects);
- if(!up){
- for(i=0; i<4; i++)
- draw(screen, rects[i], tmp[i], nil, ZP);
- return;
- }
- for(i=0; i<4; i++){
- draw(tmp[i], Rect(0, 0, Dx(rects[i]), Dy(rects[i])), screen, nil, rects[i].min);
- draw(screen, rects[i], red, nil, ZP);
- }
- }
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