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sheet.c
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#include "bootpack.h"
#define SHEET_USE 1
struct SHTCTL *shtctl_init(struct MEMMAN *memman, unsigned char *vram, int xsize, int ysize)
{
struct SHTCTL *ctl;
int i;
ctl = (struct SHTCTL *) memman_alloc_4k(memman, sizeof (struct SHTCTL));
if (ctl == 0) {
goto err;
}
ctl->map = (unsigned char *) memman_alloc_4k(memman, xsize * ysize);
if (ctl->map == 0) {
memman_free_4k(memman, (int) ctl, sizeof (struct SHTCTL));
goto err;
}
ctl->vram = vram;
ctl->xsize = xsize;
ctl->ysize = ysize;
ctl->top = -1; /*没有一张SHEET*/
for (i = 0; i < MAX_SHEETS; i++) {
ctl->sheets0[i].flags = 0; /*未使用标记*/
ctl->sheets0[i].ctl = ctl; /*记录所属*/
}
err:
return ctl;
}
struct SHEET *sheet_alloc(struct SHTCTL *ctl)
{
struct SHEET *sht;
int i;
for (i = 0; i < MAX_SHEETS; i++) {
if (ctl->sheets0[i].flags == 0) {
sht = &ctl->sheets0[i];
sht->flags = SHEET_USE;
sht->height = -1;
return sht;
}
}
return 0;
}
void sheet_setbuf(struct SHEET *sht, unsigned char *buf, int xsize, int ysize, int col_inv)
{
sht->buf = buf;
sht->bxsize = xsize;
sht->bysize = ysize;
sht->col_inv = col_inv;
return;
}
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, sid4, *p;
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];
sid = sht - ctl->sheets0; /* 将进行了减法计算的地址作为图层号码使用 */
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;
if (sht->col_inv == -1) {
if ((sht->vx0 & 3) == 0 && (bx0 & 3) == 0 && (bx1 & 3) == 0) {
bx1 = (bx1 - bx0) / 4;
sid4 = sid | sid << 8 | sid << 16 | sid << 24;
for (by = by0; by < by1; by++) {
vy = sht->vy0 + by;
vx = sht->vx0 + bx0;
p = (int*)&map[vy * ctl->xsize + vx];
for (bx = 0; bx < bx1; bx++) {
p[bx] = sid4;
}
}
} else {
for (by = by0; by < by1; by++) {
vy = sht->vy0 + by;
for (bx = bx0; bx < bx1; bx++) {
vx = sht->vx0 + bx;
map[vy * ctl->xsize + vx] = sid;
}
}
}
} else {
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) {
map[vy * ctl->xsize + vx] = sid;
}
}
}
}
}
return;
}
void sheet_refreshsub(struct SHTCTL* ctl, int vx0, int vy0, int vx1, int vy1, int h0, int h1)
{
int h, bx, by, vx, vy, bx0, by0, bx1, by1, bx2, sid4, i, i1, *p, *q, *r;
unsigned char *buf, *vram = ctl->vram, *map = ctl->map, sid;
struct SHEET* sht;
/*如果refresh的范围超出了画面则修正*/
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 <= h1; h++) {
sht = ctl->sheets[h];
buf = sht->buf;
sid = sht - ctl->sheets0;
/* 利用vx0~vy1，对bx0~by1进行倒推 */
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;
}
if ((sht->vx0 & 3) == 0) {
i = (bx0 + 3) / 4;
i1 = bx1 / 4;
i1 = i1 - i;
sid4 = sid | sid << 8 | sid << 16 | sid << 24;
for (by = by0; by < by1; by++) {
vy = sht->vy0 + by;
for (bx = bx0; bx < bx1 && (bx & 3) != 0; bx++) {
vx = sht->vx0 + bx;
if (map[vy * ctl->xsize + vx] == sid) {
vram[vy * ctl->xsize + vx] = buf[by * sht->bxsize + bx];
}
}
vx = sht->vx0 + bx;
p = (int*)&map[vy * ctl->xsize + vx];
q = (int*)&vram[vy * ctl->xsize + vx];
r = (int*)&buf[by * sht->bxsize + bx];
for (i = 0; i < i1; i++) {
if (p[i] == sid4) {
q[i] = r[i];
} else {
bx2 = bx + i * 4;
vx = sht->vx0 + bx2;
if (map[vy * ctl->xsize + vx + 0] == sid) {
vram[vy * ctl->xsize + vx + 0] = buf[by * sht->bxsize + bx2 + 0];
}
if (map[vy * ctl->xsize + vx + 1] == sid) {
vram[vy * ctl->xsize + vx + 1] = buf[by * sht->bxsize + bx2 + 1];
}
if (map[vy * ctl->xsize + vx + 2] == sid) {
vram[vy * ctl->xsize + vx + 2] = buf[by * sht->bxsize + bx2 + 2];
}
if (map[vy * ctl->xsize + vx + 3] == sid) {
vram[vy * ctl->xsize + vx + 3] = buf[by * sht->bxsize + bx2 + 3];
}
}
}
for (bx += i1 * 4; bx < bx1; bx++) {
vx = sht->vx0 + bx;
if (map[vy * ctl->xsize + vx] == sid) {
vram[vy * ctl->xsize + vx] = buf[by * sht->bxsize + bx];
}
}
}
} else {
for (by = by0; by < by1; by++) {
vy = sht->vy0 + by;
for (bx = bx0; bx < bx1; bx++) {
vx = sht->vx0 + bx;
if (map[vy * ctl->xsize + vx] == sid) {
vram[vy * ctl->xsize + vx] = buf[by * sht->bxsize + bx];
}
}
}
}
}
return;
}
void sheet_updown(struct SHEET *sht, int height)
{
struct SHTCTL* ctl = sht->ctl;
int h, old = sht->height; /*将设置前的高度记录下来*/
if (height > ctl->top + 1) {
height = ctl->top + 1;
}
if (height < -1) {
height = -1;
}
sht->height = height;
if (old > height) {
if (height >= 0) {
for (h = old; h > height; h--) {
ctl->sheets[h] = ctl->sheets[h - 1];
ctl->sheets[h]->height = h;
}
ctl->sheets[height] = sht;
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 {
if (ctl->top > old) {
for (h = old; h < ctl->top; h++) {
ctl->sheets[h] = ctl->sheets[h + 1];
ctl->sheets[h]->height = h;
}
}
ctl->top--;
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 if (old < height) {
if (old >= 0) {
for (h = old; h < height; h++) {
ctl->sheets[h] = ctl->sheets[h + 1];
ctl->sheets[h]->height = h;
}
ctl->sheets[height] = sht;
} else {
for (h = ctl->top; h >= height; h--) {
ctl->sheets[h + 1] = ctl->sheets[h];
ctl->sheets[h + 1]->height = h + 1;
}
ctl->sheets[height] = sht;
ctl->top++;
}
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);
}
return;
}
void sheet_refresh(struct SHEET* sht, int bx0, int by0, int bx1, int by1)
{
if (sht->height >= 0) { /*如果正在显示，则按新图层的信息进行刷新*/
sheet_refreshsub(sht->ctl, sht->vx0 + bx0, sht->vy0 + by0, sht->vx0 + bx1,
sht->vy0 + by1, sht->height, sht->height);
}
return;
}
void sheet_slide(struct SHEET* sht, int vx0, int vy0)
{
struct SHTCTL* ctl = sht->ctl;
int old_vx0 = sht->vx0, old_vy0 = sht->vy0;
sht->vx0 = vx0;
sht->vy0 = vy0;
if (sht->height >= 0) { /*如果正在显示，则按新图层的信息进行刷新*/
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);
}
return;
}
void sheet_free(struct SHEET *sht)
{
if (sht->height >= 0) {
sheet_updown(sht, -1);/*如果正在显示，则先设置为隐层*/
}
sht->flags = 0; /*未使用标记*/
return;
}