消除图层刷新10.txt

在刷新Box窗体时，也同时在刷新底层桌面
一个窗体，它的高度是10，那么它刷新时，高度为0到9的窗体根本不需要跟着刷新
否则产生闪烁
win_sheet.c中更改
sheet_refreshsub 是用来刷新图层的，这次改动就增加了一个参数h0, 这个h0就表示当前要刷新的图层的高度
在for 循环不再从0开始，而是从h0开始，也就是从当前图层的高度往上进行刷新
void sheet_refreshsub(struct SHTCTL *ctl, int vx0, int vy0, int vx1, int vy1, int h0) {
    ....
    for (h = h0; h <= ctl->top; h++) {
       .....
    } 
    .....
}

其它调用了它的函数也要做更改,在调用sheet_refreshsub的时候多添加一个参数
int sheet_refresh(struct SHTCTL *ctl, struct SHEET *sht, int bx0, int by0, int bx1, int by1) {
    if (sht->height >= 0) {
        //多添加一个图层高度的参数
        sheet_refreshsub(ctl, sht->vx0 + bx0, sht->vy0 + by0, sht->vx0 + bx1,
        sht->vy0 + by1, sht->height);
    }
    return 0;
}

void sheet_slide(struct SHTCTL *ctl, struct SHEET *sht, int vx0, int vy0) {
    int old_vx0 = sht->vx0, old_vy0 = sht->vy0;
    sht->vx0 = vx0;
    sht->vy0 = vy0;
    if (sht->height >= 0) {
         sheet_refreshsub(ctl, old_vx0, old_vy0, old_vx0 + sht->bxsize, old_vy0 + sht->bysize, 0);
         sheet_refreshsub(ctl, vx0, vy0, vx0+sht->bxsize, vy0+sht->bysize, sht->height);
    }
}

void sheet_slide(struct SHTCTL *ctl, struct SHEET *sht, int vx0, int vy0) {
    int old_vx0 = sht->vx0, old_vy0 = sht->vy0;
    sht->vx0 = vx0;
    sht->vy0 = vy0;
    if (sht->height >= 0) {
         //多添加一个图层高度的参数
         sheet_refreshsub(ctl, old_vx0, old_vy0, old_vx0 + sht->bxsize, old_vy0 + sht->bysize, 0);
         sheet_refreshsub(ctl, vx0, vy0, vx0+sht->bxsize, vy0+sht->bysize, sht->height);
    }
}

void sheet_updown(struct SHTCTL *ctl, struct SHEET *sht, int height) {
     ....
       if (old > height) {
         ....
           if (height >= 0) {
         .....

         //多添加一个图层高度的参数
           sheet_refreshsub(ctl, sht->vx0, sht->vy0, 
           sht->vx0+sht->bxsize, sht->vy0+sht->bysize, height+1);
            }
       } else {
           ....
           //多添加一个图层高度的参数
            sheet_refreshsub(ctl, sht->vx0, sht->vy0, 
            sht->vx0+sht->bxsize, sht->vy0+sht->bysize,0);
       }
    else {
        ....
        //多添加一个图层高度的参数
        sheet_refreshsub(ctl, sht->vx0, sht->vy0, sht->vx0+sht->bxsize, sht->vy0+sht->bysize,
        height);
   }
}


解决了普通图层的闪烁问题,当鼠标放置图层上,鼠标疯狂闪烁
鼠标图层比Message Box 高，当鼠标与Box重叠时，Box的刷新会导致鼠标的刷新
窗体自身刷新时，它会把处于它上方的窗体也进行刷新,这是没必要的

刷新方法更改,只更改与上层图层不重叠的区域。
// 增加map变量,记录图层每一个像素点所对应的窗体编号
struct SHTCTL {
    unsigned char *vram, *map;
    int xsize, ysize, top;
    struct SHEET *sheets[MAX_SHEETS];
    struct SHEET sheets0[MAX_SHEETS];
};

struct SHTCTL *shtctl_init(struct MEMMAN *memman, unsigned char *vram,
  int xsize, int ysize) {
  ....
   //为图层像素编号数值分配内存
    ctl->map = (unsigned char*)memman_alloc_4k(memman, xsize * ysize);
    if (ctl->map == 0) {
        memman_free_4k(memman, (int)ctl, SIZE_OF_SHTCTL);
        return 0;
    }
  .....
}

//  将图层对象在这个数值中的下标作为它的窗体编号
void sheet_refreshmap(struct SHTCTL *ctl, int vx0, int vy0, int vx1, int vy1, int h0) {
    int h, bx, by, vx, vy, bx0, by0, bx1, by1;
    unsigned char *buf, sid, *map = ctl->map;
    struct SHEET *sht;

    if (vx0 < 0) {vx0 = 0;}
    if (vy0 < 0) {vy0 = 0;}

    if (vx1 > ctl->xsize) {vx1 = ctl->xsize;}
    if (vy1 > ctl->ysize) {vy1 = ctl->ysize;}

    for (h = h0; h <= ctl->top; h++) {
        sht = ctl->sheets[h];
        //获取图层编号，也就是图层对象在图层数组中的下标
        sid = sht - ctl->sheets0;
        buf = sht->buf;
        bx0 = vx0 - sht->vx0;
        by0 = vy0 - sht->vy0;
        bx1 = vx1 - sht->vx0;
        by1 = vy1 - sht->vy0;

        if (bx0 < 0) { bx0 = 0;}
        if (by0 < 0) { by0 = 0;}
        if (bx1 > sht->bxsize) {bx1 = sht->bxsize;}
        if (by1 > sht->bysize) {by1 = sht->bysize;}

        for (by = by0; by < by1; by++) {
            vy = sht->vy0 + by;
            for (bx = bx0; bx < bx1; bx++) {
                vx = sht->vx0 + bx;
                if (buf[by * sht->bxsize + bx] != sht->col_inv) {
                    //将图层标号设置到map变量里
                    map[vy * ctl->xsize + vx] = sid;
                }
            }
        }

    }

    return;
}

用来设置像素对应的图层编号，
假如窗口1的某个像素位于坐标（20， 30），map[30*xsize + 20]=1
窗口2移动后，有像素点也移动到了坐标(20,30),map[30*xsize + 20]=2
像素所在位置对应的窗口号，就可以只刷新对应窗口的像素点
void sheet_refreshsub(struct SHTCTL *ctl, int vx0, int vy0, int vx1, int vy1, int h0, int h1) {
    int h, bx, by, vx, vy;
    unsigned char *buf, c, *vram = ctl->vram, *map = ctl->map, sid;
    struct SHEET *sht;
    if (vx0 < 0) {vx0 = 0;}
    if (vy0 < 9) {vy0 = 0;}
    if (vx1 > ctl->xsize) {vx1 = ctl->xsize;}
    if (vy1 > ctl->ysize) {vy1 = ctl->ysize;}

    for (h = h0; h <= h1; h++) {
        sht = ctl->sheets[h];
        buf = sht->buf;

        //获得当前图层对应的窗口号
        sid = sht - ctl->sheets0;

        for (by = 0; by < sht->bysize; by++) {
            vy = sht->vy0 + by;
            for (bx = 0; bx < sht->bxsize; bx++) {
                vx = sht->vx0 + bx;
                if (vx0 <= vx && vx < vx1 && vy0 <= vy && vy < vy1) {
                    c = buf[by * sht->bxsize + bx];
                    //确定当前坐标对应的素点是否属于要刷新的窗口
                    if (map[vy * ctl->xsize + vx] == sid && c != sht->col_inv) {
                        vram[vy * ctl->xsize + vx] = c;
                    }
                }
            }
        }
    }
}

其他对应的图层刷新函数也做相应改动：
void sheet_slide(struct SHTCTL *ctl, struct SHEET *sht, int vx0, int vy0) {
    int old_vx0 = sht->vx0, old_vy0 = sht->vy0;
    sht->vx0 = vx0;
    sht->vy0 = vy0;
    if (sht->height >= 0) {
         sheet_refreshmap(ctl, old_vx0, old_vy0, old_vx0 + sht->bxsize, old_vy0 + sht->bysize, 0);
         sheet_refreshmap(ctl, vx0, vy0, vx0+sht->bxsize, vy0+sht->bysize, sht->height);
         sheet_refreshsub(ctl, old_vx0, old_vy0, old_vx0 + sht->bxsize, 
                          old_vy0 + sht->bysize, 0, sht->height - 1);
         sheet_refreshsub(ctl, vx0, vy0, vx0+sht->bxsize, vy0+sht->bysize, sht->height, 
                          sht->height);
    }
}

void sheet_updown(struct SHTCTL *ctl, struct SHEET *sht, int height) {
 ....
 if (old > height) {
    ....
     if (height >= 0) {
     ....
    //窗体高度更新后，要更改像素点所在位置的窗体标号
            sheet_refreshmap(ctl, sht->vx0, sht->vy0, sht->vx0+sht->bxsize, sht->vy0+sht->bysize,
        height+1);
            sheet_refreshsub(ctl, sht->vx0, sht->vy0, sht->vx0+sht->bxsize, sht->vy0+sht->bysize,
        height+1, old);
        } else {
          ....
              //窗体高度更新后，要更改像素点所在位置的窗体标号
            sheet_refreshmap(ctl, sht->vx0, sht->vy0, sht->vx0+sht->bxsize, sht->vy0+sht->bysize,
        0);
            sheet_refreshsub(ctl, sht->vx0, sht->vy0, sht->vx0+sht->bxsize, sht->vy0+sht->bysize,
        0, old - 1);
        }
 } else {
    ....
    //窗体高度更新后，要更改像素点所在位置的窗体标号
        sheet_refreshmap(ctl, sht->vx0, sht->vy0, sht->vx0+sht->bxsize, sht->vy0+sht->bysize,
        height);       

        sheet_refreshsub(ctl, sht->vx0, sht->vy0, sht->vx0+sht->bxsize, sht->vy0+sht->bysize,
        height, height);
   }


}