aboutsummaryrefslogblamecommitdiffstats
path: root/src/bin/elementary/test_flip_page_eo.c
blob: e313e2848c85ac153914ac392a9e5abe78723e69 (plain) (tree)
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894

























































































                                                                                                        


                                                              




                                       

                                                                                                             



                                       

                                                                                                                   



                                       

                                                                                                             



                                       

                                                                                                                   








                                                                                                   
                                                                                       




                              

                                                                       
      
                                                                               




                                                                                                      
                                                











                                                                                 
                                                              


                                                  
                                                          






























































































                                                                           
                                                            







                                                                 
                                                    




















































































































































































































































































































































































































































































































































































































































                                                                                                       
#ifdef HAVE_CONFIG_H
# include "elementary_config.h"
#endif
#include <Elementary.h>

typedef struct _State State;
typedef struct _Slice Slice;

typedef struct _Vertex2 Vertex2;
typedef struct _Vertex3 Vertex3;

struct _State
{
   Evas_Object *front, *back;
   Evas_Coord down_x, down_y, x, y;
   Eina_Bool down : 1;
   Eina_Bool backflip : 1;

   Ecore_Animator *anim;
   Ecore_Job *job;
   Evas_Coord ox, oy, w, h;
   int slices_w, slices_h;
   Slice **slices, **slices2;
   int dir; // 0 == left, 1 == right, 2 == up, 3 == down
   int finish;
};

struct _Slice
{
   Evas_Object *obj;
   // (0)---(1)
   //  |     |
   //  |     |
   // (3)---(2)
   double u[4], v[4], x[4], y[4], z[4];
};

struct _Vertex2
{
   double x, y;
};

struct _Vertex3
{
   double x, y, z;
};

static State state =
{
   NULL, NULL,
   0, 0, 0, 0,
   0,
   0,

   NULL,
   NULL,
   0, 0, 0, 0,
   0, 0,
   NULL, NULL,
   -1,
   0
};

static Slice *
_slice_new(State *st EINA_UNUSED, Evas_Object *obj, int x, int y, int w, int h)
{
   Slice *sl;

   sl = calloc(1, sizeof(Slice));
   if (!sl) return NULL;
   sl->obj = evas_object_image_add(evas_object_evas_get(obj));
   evas_object_image_smooth_scale_set(sl->obj, EINA_FALSE);
   evas_object_pass_events_set(sl->obj, EINA_TRUE);
   evas_object_image_source_set(sl->obj, obj);
   evas_object_geometry_set(sl->obj, x, y, w, h);
   return sl;
}

static void
_slice_free(Slice *sl)
{
   evas_object_del(sl->obj);
   free(sl);
}

static void
_slice_apply(State *st, Slice *sl,
             Evas_Coord x EINA_UNUSED, Evas_Coord y EINA_UNUSED, Evas_Coord w, Evas_Coord h EINA_UNUSED,
             Evas_Coord ox, Evas_Coord oy, Evas_Coord ow, Evas_Coord oh)
{
   efl_gfx_mapping_reset(sl->obj);
   efl_gfx_mapping_smooth_set(sl->obj, EINA_TRUE);
   efl_gfx_mapping_color_set(sl->obj, -1, 255, 255, 255, 255);
   for (int i = 0; i < 4; i++)
     {
        if (st->dir == 0)
          {
             int p[4] = { 0, 1, 2, 3 };
             efl_gfx_mapping_coord_absolute_set(sl->obj, i, ox + sl->x[p[i]], oy + sl->y[p[i]], sl->z[p[i]]);
             efl_gfx_mapping_uv_set(sl->obj, i, sl->u[p[i]] , sl->v[p[i]]);
          }
        else if (st->dir == 1)
          {
             int p[4] = { 1, 0, 3, 2 };
             efl_gfx_mapping_coord_absolute_set(sl->obj, i, ox + (w - sl->x[p[i]]), oy + sl->y[p[i]], sl->z[p[i]]);
             efl_gfx_mapping_uv_set(sl->obj, i, 1. - sl->u[p[i]] , sl->v[p[i]]);
          }
        else if (st->dir == 2)
          {
             int p[4] = { 1, 0, 3, 2 };
             efl_gfx_mapping_coord_absolute_set(sl->obj, i, ox + sl->y[p[i]], oy + sl->x[p[i]], sl->z[p[i]]);
             efl_gfx_mapping_uv_set(sl->obj, i, sl->v[p[i]] , sl->u[p[i]]);
          }
        else if (st->dir == 3)
          {
             int p[4] = { 0, 1, 2, 3 };
             efl_gfx_mapping_coord_absolute_set(sl->obj, i, ox + sl->y[p[i]], oy + (w - sl->x[p[i]]), sl->z[p[i]]);
             efl_gfx_mapping_uv_set(sl->obj, i, sl->v[p[i]] , 1. - sl->u[p[i]]);
          }
     }
   evas_object_image_fill_set(sl->obj, 0, 0, ow, oh);
}

static void
_slice_3d(State *st EINA_UNUSED, Slice *sl, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
{
   // vanishing point is center of page, and focal dist is 1024
   efl_gfx_mapping_perspective_3d_absolute(sl->obj, x + (w / 2), y + (h / 2), 0, 1024);

   for (int i = 0; i < 4; i++)
     {
        double xx, yy;

        efl_gfx_mapping_coord_absolute_get(sl->obj, i, &xx, &yy, NULL);
        efl_gfx_mapping_coord_absolute_set(sl->obj, i, xx, yy, 0);
     }
   efl_gfx_entity_visible_set(sl->obj, efl_gfx_mapping_clockwise_get(sl->obj));
}

static void
_slice_light(State *st EINA_UNUSED, Slice *sl, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
{
   efl_gfx_mapping_lighting_3d_absolute(sl->obj,
                                     // light position
                                     // (centered over page 10 * h toward camera)
                                     x + (w / 2), y + (h / 2), -10000,
                                     255, 255, 255, // light color
                                     0 , 0 , 0); // ambient minimum

   // multiply brightness by 1.2 to make lightish bits all white so we dont
   // add shading where we could otherwise be pure white
   for (int i = 0; i < 4; i++)
     {
        int r, g, b, a;

        efl_gfx_mapping_color_get(sl->obj, i, &r, &g, &b, &a);
        r = (double)r * 1.2; if (r > 255) r = 255;
        g = (double)g * 1.2; if (g > 255) g = 255;
        b = (double)b * 1.2; if (b > 255) b = 255;
        efl_gfx_mapping_color_set(sl->obj, i, r, g, b, a);
     }
}

static void
_slice_xyz(State *st EINA_UNUSED, Slice *sl,
           double xx1, double yy1, double zz1,
           double xx2, double yy2, double zz2,
           double xx3, double yy3, double zz3,
           double xx4, double yy4, double zz4)
{
   sl->x[0] = xx1; sl->y[0] = yy1; sl->z[0] = zz1;
   sl->x[1] = xx2; sl->y[1] = yy2; sl->z[1] = zz2;
   sl->x[2] = xx3; sl->y[2] = yy3; sl->z[2] = zz3;
   sl->x[3] = xx4; sl->y[3] = yy4; sl->z[3] = zz4;
}

static void
_slice_uv(State *st EINA_UNUSED, Slice *sl,
           double u1, double v1,
           double u2, double v2,
           double u3, double v3,
           double u4, double v4)
{
   sl->u[0] = u1; sl->v[0] = v1;
   sl->u[1] = u2; sl->v[1] = v2;
   sl->u[2] = u3; sl->v[2] = v3;
   sl->u[3] = u4; sl->v[3] = v4;
}

static void
_deform_point(Vertex2 *vi, Vertex3 *vo, double rho, double theta, double A)
{
   // ^Y
   // |
   // |    X
   // +---->
   // theta == cone angle (0 -> PI/2)
   // A     == distance of cone apex from origin
   // rho   == angle of cone from vertical axis (...-PI/2 to PI/2...)
   Vertex3  v1;
   double d, r, b;

   d = sqrt((vi->x * vi->x) + pow(vi->y - A, 2));
   r = d * sin(theta);
   b = asin(vi->x / d) / sin(theta);

   v1.x = r * sin(b);
   v1.y = d + A - (r * (1 - cos(b)) * sin(theta));
   v1.z = r * (1 - cos(b)) * cos(theta);

   vo->x = (v1.x * cos(rho)) - (v1.z * sin(rho));
   vo->y = v1.y;
   vo->z = (v1.x * sin(rho)) + (v1.z * cos(rho));
}

static void
_interp_point(Vertex3 *vi1, Vertex3 *vi2, Vertex3 *vo, double v)
{
   vo->x = (v * vi2->x) + ((1.0 - v) * vi1->x);
   vo->y = (v * vi2->y) + ((1.0 - v) * vi1->y);
   vo->z = (v * vi2->z) + ((1.0 - v) * vi1->z);
}

static void
_state_slices_clear(State *st)
{
   int i, j, num;

   if (st->slices)
     {
        num = 0;
        for (j = 0; j < st->slices_h; j++)
          {
             for (i = 0; i < st->slices_w; i++)
               {
                  if (st->slices[num]) _slice_free(st->slices[num]);
                  if (st->slices2[num]) _slice_free(st->slices2[num]);
                  num++;
               }
          }
        free(st->slices);
        free(st->slices2);
        st->slices = NULL;
        st->slices2 = NULL;
     }
   st->slices_w = 0;
   st->slices_h = 0;
}

static int
_slice_obj_color_sum(Slice *s, int p, int *r, int *g, int *b, int *a)
{
   int rr = 0, gg = 0, bb = 0, aa = 0;

   if (!s) return 0;
   efl_gfx_mapping_color_get(s->obj, p, &rr, &gg, &bb, &aa);
   *r += rr; *g += gg; *b += bb; *a += aa;
   return 1;
}

static void
_slice_obj_color_set(Slice *s, int p, int r, int g, int b, int a)
{
   if (!s) return;
   efl_gfx_mapping_color_set(s->obj, p, r, g, b, a);
}

static void
_slice_obj_vert_color_merge(Slice *s1, int p1, Slice *s2, int p2,
                            Slice *s3, int p3, Slice *s4, int p4)
{
   int r = 0, g = 0, b = 0, a = 0, n = 0;

   n += _slice_obj_color_sum(s1, p1, &r, &g, &b, &a);
   n += _slice_obj_color_sum(s2, p2, &r, &g, &b, &a);
   n += _slice_obj_color_sum(s3, p3, &r, &g, &b, &a);
   n += _slice_obj_color_sum(s4, p4, &r, &g, &b, &a);

   if (n < 1) return;
   r /= n; g /= n; b /= n; a /= n;

   _slice_obj_color_set(s1, p1, r, g, b, a);
   _slice_obj_color_set(s2, p2, r, g, b, a);
   _slice_obj_color_set(s3, p3, r, g, b, a);
   _slice_obj_color_set(s4, p4, r, g, b, a);
}

static int
_state_update(State *st)
{
   Evas_Coord xx1, yy1, xx2, yy2, mx, my, dst, dx, dy;
   Evas_Coord x, y, w, h, ox, oy, ow, oh;
   int i, j, num, nn, jump, num2;
   Slice *sl;
   double b, minv = 0.0, minva, mgrad;
   int gx, gy, gszw, gszh, gw, col, row, nw, nh;
   double rho, A, theta, perc, n, rhol, Al, thetal;
   Vertex3 *tvo, *tvol;

   st->backflip = 0;

   evas_object_geometry_get(st->front, &x, &y, &w, &h);
   ox = x; oy = y; ow = w; oh = h;
   xx1 = st->down_x;
   yy1 = st->down_y;
   xx2 = st->x;
   yy2 = st->y;

   dx = xx2 - xx1;
   dy = yy2 - yy1;
   dst = sqrt((dx * dx) + (dy * dy));
   if (st->dir == -1)
     {
        if (dst < 20) // MAGIC: 20 == drag hysterisis
           return 0;
     }
   if (st->dir == -1)
     {
        if      ((xx1 > (w / 2)) && (dx <  0) && (abs(dx) >  abs(dy))) st->dir = 0; // left
        else if ((xx1 < (w / 2)) && (dx >= 0) && (abs(dx) >  abs(dy))) st->dir = 1; // right
        else if ((yy1 > (h / 2)) && (dy <  0) && (abs(dy) >= abs(dx))) st->dir = 2; // up
        else if ((yy1 < (h / 2)) && (dy >= 0) && (abs(dy) >= abs(dx))) st->dir = 3; // down
        if (st->dir == -1) return 0;
     }
   if (st->dir == 0)
     {
        // no nothing. left drag is standard
     }
   else if (st->dir == 1)
     {
        xx1 = (w - 1) - xx1;
        xx2 = (w - 1) - xx2;
     }
   else if (st->dir == 2)
     {
        Evas_Coord tmp;

        tmp = xx1; xx1 = yy1; yy1 = tmp;
        tmp = xx2; xx2 = yy2; yy2 = tmp;
        tmp = w; w = h; h = tmp;
     }
   else if (st->dir == 3)
     {
        Evas_Coord tmp;

        tmp = xx1; xx1 = yy1; yy1 = tmp;
        tmp = xx2; xx2 = yy2; yy2 = tmp;
        tmp = w; w = h; h = tmp;
        xx1 = (w - 1) - xx1;
        xx2 = (w - 1) - xx2;
     }

   if (xx2 >= xx1) xx2 = xx1 - 1;
   mx = (xx1 + xx2) / 2;
   my = (yy1 + yy2) / 2;

   if (mx < 0) mx = 0;
   else if (mx >= w) mx = w - 1;
   if (my < 0) my = 0;
   else if (my >= h) my = h - 1;

   mgrad = (double)(yy1 - yy2) / (double)(xx1 - xx2);

   if (mx < 1) mx = 1; // quick hack to keep curl line visible

   if (EINA_DBL_EQ(mgrad, 0.0)) // special horizontal case
      mgrad = 0.001; // quick dirty hack for now
   // else
     {
        minv = 1.0 / mgrad;
        // y = (m * x) + b
        b = my + (minv * mx);
     }
   if ((b >= -5) && (b <= (h + 5)))
     {
        if (minv > 0.0) // clamp to h
          {
             minv = (double)(h + 5 - my) / (double)(mx);
             b = my + (minv * mx);
          }
        else // clamp to 0
          {
             minv = (double)(-5 - my) / (double)(mx);
             b = my + (minv * mx);
          }
     }

   perc = (double)xx2 / (double)xx1;
   if (perc < 0.0) perc = 0.0;
   else if (perc > 1.0) perc = 1.0;

   minva = atan(minv) / (M_PI / 2);
   if (minva < 0.0) minva = -minva;

   // A = apex of cone
   if (b <= 0) A = b;
   else A = h - b;
   if (A < -(h * 20)) A = -h * 20;
   //--//
   Al = -5;

   // rho = is how much the page is turned
   n = 1.0 - perc;
   n = 1.0 - cos(n * M_PI / 2.0);
   n = n * n;
   rho = -(n * M_PI);
   //--//
   rhol = -(n * M_PI);

   // theta == curliness (how much page culrs in on itself
   n = sin((1.0 - perc) * M_PI);
   n = n * 1.2;
   theta = 7.86 + n;
   //--//
   n = sin((1.0 - perc) * M_PI);
   n = 1.0 - n;
   n = n * n;
   n = 1.0 - n;
   thetal = 7.86 + n;

   nw = 16;
   nh = 16;
   gszw = w / nw;
   gszh = h / nh;
   if (gszw < 4) gszw = 4;
   if (gszh < 4) gszh = 4;

   nw = (w + gszw - 1) / gszw;
   nh = (h + gszh - 1) / gszh;
   if ((st->slices_w != nw) || (st->slices_h != nh)) _state_slices_clear(st);
   st->slices_w = nw;
   st->slices_h = nh;
   if (!st->slices)
     {
        st->slices = calloc(st->slices_w * st->slices_h, sizeof(Slice *));
        if (!st->slices) return 0;
        st->slices2 = calloc(st->slices_w * st->slices_h, sizeof(Slice *));
        if (!st->slices2)
          {
             free(st->slices);
             st->slices = NULL;
             return 0;
          }
     }

   num = (st->slices_w + 1) * (st->slices_h + 1);

   tvo = alloca(sizeof(Vertex3) * num);
   tvol = alloca(sizeof(Vertex3) * (st->slices_w + 1));

   for (col = 0, gx = 0; gx <= (w + gszw - 1); gx += gszw, col++)
     {
        Vertex2 vil;

        vil.x = gx;
        vil.y = h - gx;
        _deform_point(&vil, &(tvol[col]), rhol, thetal, Al);
     }

   n = minva * sin(perc * M_PI);
   n = n * n;

   num = 0;
   for (col = 0, gx = 0; gx <= (w + gszw - 1); gx += gszw, col++)
     {
        for (gy = 0; gy <= (h + gszh - 1); gy += gszh)
          {
             Vertex2 vi;
             Vertex3 vo, tvo1;

             if (gx > w) vi.x = w;
             else vi.x = gx;
             if (gy > h) vi.y = h;
             else vi.y = gy;
             _deform_point(&vi, &vo, rho, theta, A);
             tvo1 = tvol[col];
             if (gy > h) tvo1.y = h;
             else tvo1.y = gy;
             _interp_point(&vo, &tvo1, &(tvo[num]), n);
             num++;
          }
     }

   jump = st->slices_h + 1;
   for (col = 0, gx = 0; gx < w; gx += gszw, col++)
     {
        num = st->slices_h * col;
        num2 = jump * col;

        gw = gszw;
        if ((gx + gw) > w) gw = w - gx;

        for (row = 0, gy = 0; gy < h; gy += gszh, row++)
          {
             double rgx, rgy, rgw, rgh;
             Vertex3 vo[4];

             memset(vo, 0, sizeof(vo));

             if (b > 0) nn = num + st->slices_h - row - 1;
             else nn = num + row;

             // Relative values
             rgx = gx / (double) w;
             rgy = gy / (double) h;
             rgw = gw / (double) w;
             rgh = gszh / (double) h;

             if ((rgy + rgh) > 1) rgh = 1 - rgy;

             vo[0] = tvo[num2 + row];
             vo[1] = tvo[num2 + row + jump];
             vo[2] = tvo[num2 + row + jump + 1];
             vo[3] = tvo[num2 + row + 1];
#define SWP(a, b) do {typeof(a) vt; vt = (a); (a) = (b); (b) = vt;} while (0)
             if (b > 0)
               {
                  SWP(vo[0], vo[3]);
                  SWP(vo[1], vo[2]);
                  vo[0].y = h - vo[0].y;
                  vo[1].y = h - vo[1].y;
                  vo[2].y = h - vo[2].y;
                  vo[3].y = h - vo[3].y;
               }

             // FRONT
             sl = st->slices[nn];
             if (!sl)
               {
                  sl = _slice_new(st, st->front, x, y, w, h);
                  st->slices[nn] = sl;
               }

             _slice_xyz(st, sl,
                        vo[0].x, vo[0].y, vo[0].z,
                        vo[1].x, vo[1].y, vo[1].z,
                        vo[2].x, vo[2].y, vo[2].z,
                        vo[3].x, vo[3].y, vo[3].z);
             if (b <= 0)
                _slice_uv(st, sl,
                          rgx,       rgy,       rgx + rgw, rgy,
                          rgx + rgw, rgy + rgh, rgx,       rgy + rgh);
             else
                _slice_uv(st, sl,
                          rgx,       1 - (rgy + rgh), rgx + rgw, 1 - (rgy + rgh),
                          rgx + rgw, 1 - rgy,         rgx,       1 - rgy);

             // BACK
             sl = st->slices2[nn];
             if (!sl)
               {
                  sl = _slice_new(st, st->back, x, y, w, h);
                  st->slices2[nn] = sl;
               }

             _slice_xyz(st, sl,
                        vo[1].x, vo[1].y, vo[1].z,
                        vo[0].x, vo[0].y, vo[0].z,
                        vo[3].x, vo[3].y, vo[3].z,
                        vo[2].x, vo[2].y, vo[2].z);
             if (st->backflip)
               {
                  if (b <= 0)
                     _slice_uv(st, sl,
                               rgx + rgw, rgy,       rgx,       rgy,
                               rgx,       rgy + rgh, rgx + rgw, rgy + rgh);
                  else
                     _slice_uv(st, sl,
                               rgx + rgw, 1 - (rgy + rgh), rgx,       1 - (rgy + rgh),
                               rgx,       1 - rgy,         rgx + rgw, 1 - rgy);
               }
             else
               {
                  if (b <= 0)
                     _slice_uv(st, sl,
                               1 - (rgx + rgw), rgy,       1 - (rgx),       rgy,
                               1 - (rgx),       rgy + rgh, 1 - (rgx + rgw), rgy + rgh);
                  else
                     _slice_uv(st, sl,
                               1 - (rgx + rgw), 1 - (rgy + rgh), 1 - (rgx),       1 - (rgy + rgh),
                               1 - (rgx),       1 - rgy,         1 - (rgx + rgw), 1 - rgy);
               }
          }
     }

   num = 0;
   for (j = 0; j < st->slices_h; j++)
     {
        for (i = 0; i < st->slices_w; i++)
          {
             _slice_apply(st, st->slices[num], x, y, w, h, ox, oy, ow, oh);
             _slice_apply(st, st->slices2[num], x, y, w, h, ox, oy, ow, oh);
             _slice_light(st, st->slices[num], ox, oy, ow, oh);
             _slice_light(st, st->slices2[num], ox, oy, ow, oh);
             num++;
          }
     }

   for (i = 0; i <= st->slices_w; i++)
     {
        num = i * st->slices_h;
        for (j = 0; j <= st->slices_h; j++)
          {
             Slice *s[4];

             s[0] = s[1] = s[2] = s[3] = NULL;
             if ((i > 0)            && (j > 0))
                s[0] = st->slices[num - 1 - st->slices_h];
             if ((i < st->slices_w) && (j > 0))
                s[1] = st->slices[num - 1];
             if ((i > 0)            && (j < st->slices_h))
                s[2] = st->slices[num - st->slices_h];
             if ((i < st->slices_w) && (j < st->slices_h))
                s[3] = st->slices[num];
             if (st->dir == 0)
                _slice_obj_vert_color_merge(s[0], 2, s[1], 3,
                                            s[2], 1, s[3], 0);
             else if (st->dir == 1)
                _slice_obj_vert_color_merge(s[0], 3, s[1], 2,
                                            s[2], 0, s[3], 1);
             else if (st->dir == 2)
                _slice_obj_vert_color_merge(s[0], 3, s[1], 2,
                                            s[2], 0, s[3], 1);
             else if (st->dir == 3)
                _slice_obj_vert_color_merge(s[0], 2, s[1], 3,
                                            s[2], 1, s[3], 0);
             s[0] = s[1] = s[2] = s[3] = NULL;
             if ((i > 0)            && (j > 0))
                s[0] = st->slices2[num - 1 - st->slices_h];
             if ((i < st->slices_w) && (j > 0))
                s[1] = st->slices2[num - 1];
             if ((i > 0)            && (j < st->slices_h))
                s[2] = st->slices2[num - st->slices_h];
             if ((i < st->slices_w) && (j < st->slices_h))
                s[3] = st->slices2[num];
             if (st->dir == 0)
                _slice_obj_vert_color_merge(s[0], 3, s[1], 2,
                                            s[2], 0, s[3], 1);
             else if (st->dir == 1)
                _slice_obj_vert_color_merge(s[0], 2, s[1], 3,
                                            s[2], 1, s[3], 0);
             else if (st->dir == 2)
                _slice_obj_vert_color_merge(s[0], 2, s[1], 3,
                                            s[2], 1, s[3], 0);
             else if (st->dir == 3)
                _slice_obj_vert_color_merge(s[0], 3, s[1], 2,
                                            s[2], 0, s[3], 1);
             num++;
          }
     }

   num = 0;
   for (i = 0; i < st->slices_w; i++)
     {
        for (j = 0; j < st->slices_h; j++)
          {
             _slice_3d(st, st->slices[num], ox, oy, ow, oh);
             _slice_3d(st, st->slices2[num], ox, oy, ow, oh);
             num++;
          }
     }

   return 1;
}

static void
_state_end(State *st)
{
   _state_slices_clear(st);
}

static Eina_Bool
_state_anim(void *data, double pos)
{
   State *st = data;
   double p;

   p = ecore_animator_pos_map(pos, ECORE_POS_MAP_ACCELERATE, 0.0, 0.0);
   if (st->finish)
     {
        if (st->dir == 0)
           st->x = st->ox * (1.0 - p);
        else if (st->dir == 1)
           st->x = st->ox + ((st->w - st->ox) * p);
        else if (st->dir == 2)
           st->y = st->oy * (1.0 - p);
        else if (st->dir == 3)
           st->y = st->oy + ((st->h - st->oy) * p);
     }
   else
     {
        if (st->dir == 0)
           st->x = st->ox + ((st->w - st->ox) * p);
        else if (st->dir == 1)
           st->x = st->ox * (1.0 - p);
        else if (st->dir == 2)
           st->y = st->oy + ((st->h - st->oy) * p);
        else if (st->dir == 3)
           st->y = st->oy * (1.0 - p);
     }
   _state_update(st);
   if (pos < 1.0) return EINA_TRUE;
   evas_object_show(st->front);
   evas_object_show(st->back);
   _state_end(st);
   st->anim = NULL;
   return EINA_FALSE;
}

static void
_update_curl_job(void *data)
{
   State *st = data;
   st->job = NULL;
   if (_state_update(st))
     {
        evas_object_hide(st->front);
        evas_object_hide(st->back);
     }
}

static void
im_down_cb(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
{
   State *st = &state;
   Evas_Event_Mouse_Down *ev = event_info;
   Evas_Coord x, y, w, h;

   if (ev->button != 1) return;
   st->front = data;
   st->back = evas_object_data_get(data, "im2");
   st->backflip = 1;
   st->down = 1;
   evas_object_geometry_get(st->front, &x, &y, &w, &h);
   st->x = ev->canvas.x - x;
   st->y = ev->canvas.y - y;
   st->w = w;
   st->h = h;
   st->down_x = st->x;
   st->down_y = st->y;
   st->dir = -1;
   if (_state_update(st))
     {
        evas_object_hide(st->front);
        evas_object_hide(st->back);
     }
}

static void
im_up_cb(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
{
   State *st = &state;
   Evas_Event_Mouse_Up *ev = event_info;
   Evas_Coord x, y, w, h;
   double tm = 0.5;

   if (ev->button != 1) return;
   st->down = 0;
   evas_object_geometry_get(st->front, &x, &y, &w, &h);
   st->x = ev->canvas.x - x;
   st->y = ev->canvas.y - y;
   st->w = w;
   st->h = h;
   st->ox = st->x;
   st->oy = st->y;
   if (st->job)
     {
        ecore_job_del(st->job);
        st->job = NULL;
     }
   if (st->anim) ecore_animator_del(st->anim);
   st->finish = 0;
   if (st->dir == 0)
     {
        tm = (double)st->x / (double)st->w;
        if (st->x < (st->w / 2)) st->finish = 1;
     }
   else if (st->dir == 1)
     {
        if (st->x > (st->w / 2)) st->finish = 1;
        tm = 1.0 - ((double)st->x / (double)st->w);
     }
   else if (st->dir == 2)
     {
        if (st->y < (st->h / 2)) st->finish = 1;
        tm = (double)st->y / (double)st->h;
     }
   else if (st->dir == 3)
     {
        if (st->y > (st->h / 2)) st->finish = 1;
        tm = 1.0 - ((double)st->y / (double)st->h);
     }
   if (tm < 0.01) tm = 0.01;
   else if (tm > 0.99) tm = 0.99;
   if (!st->finish) tm = 1.0 - tm;
   tm *= 0.5;
   st->anim = ecore_animator_timeline_add(tm, _state_anim, st);
   _state_anim(st, 0.0);
}

static void
im_move_cb(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
{
   State *st = &state;
   Evas_Event_Mouse_Move *ev = event_info;
   Evas_Coord x, y, w, h;

   if (!st->down) return;
   evas_object_geometry_get(st->front, &x, &y, &w, &h);
   st->x = ev->cur.canvas.x - x;
   st->y = ev->cur.canvas.y - y;
   st->w = w;
   st->h = h;
   if (st->job) ecore_job_del(st->job);
   st->job = ecore_job_add(_update_curl_job, st);
}

void
test_flip_page_eo(void *data EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info EINA_UNUSED)
{
   Evas_Object *win, *im, *im2, *rc;
   char buf[PATH_MAX];

   win = elm_win_util_standard_add("flip-page", "Flip Page (EO API)");
   elm_win_focus_highlight_enabled_set(win, EINA_TRUE);
   elm_win_autodel_set(win, EINA_TRUE);

   im2 = evas_object_image_filled_add(evas_object_evas_get(win));
   snprintf(buf, sizeof(buf), "%s/images/%s",
            elm_app_data_dir_get(), "sky_04.jpg");
   evas_object_image_file_set(im2, buf, NULL);
   evas_object_move(im2, 40, 40);
   evas_object_resize(im2, 400, 400);
   evas_object_show(im2);

#if 0
   im = elm_layout_add(win);
   snprintf(buf, sizeof(buf), "%s/objects/test.edj", elm_app_data_dir_get());
   elm_layout_file_set(im, buf, "layout");
#else
   im = evas_object_image_filled_add(evas_object_evas_get(win));
   snprintf(buf, sizeof(buf), "%s/images/%s",
            elm_app_data_dir_get(), "twofish.jpg");
   evas_object_image_file_set(im, buf, NULL);
#endif
   evas_object_move(im, 40, 40);
   evas_object_resize(im, 400, 400);
   evas_object_show(im);

   evas_object_data_set(im, "im2", im2);

   rc = evas_object_rectangle_add(evas_object_evas_get(win));
   evas_object_color_set(rc, 0, 0, 0, 0);
   evas_object_move(rc, 40, 340);
   evas_object_resize(rc, 400, 100);
   evas_object_show(rc);

   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_DOWN, im_down_cb, im);
   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_UP,   im_up_cb,   im);
   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_MOVE, im_move_cb, im);

   rc = evas_object_rectangle_add(evas_object_evas_get(win));
   evas_object_color_set(rc, 0, 0, 0, 0);
   evas_object_move(rc, 40, 40);
   evas_object_resize(rc, 400, 100);
   evas_object_show(rc);

   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_DOWN, im_down_cb, im);
   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_UP,   im_up_cb,   im);
   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_MOVE, im_move_cb, im);

   rc = evas_object_rectangle_add(evas_object_evas_get(win));
   evas_object_color_set(rc, 0, 0, 0, 0);
   evas_object_move(rc, 340, 40);
   evas_object_resize(rc, 100, 400);
   evas_object_show(rc);

   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_DOWN, im_down_cb, im);
   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_UP,   im_up_cb,   im);
   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_MOVE, im_move_cb, im);

   rc = evas_object_rectangle_add(evas_object_evas_get(win));
   evas_object_color_set(rc, 0, 0, 0, 0);
   evas_object_move(rc, 40, 40);
   evas_object_resize(rc, 100, 400);
   evas_object_show(rc);

   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_DOWN, im_down_cb, im);
   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_UP,   im_up_cb,   im);
   evas_object_event_callback_add(rc, EVAS_CALLBACK_MOUSE_MOVE, im_move_cb, im);

   evas_object_resize(win, 480, 480);
   evas_object_show(win);
}