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transform_save should check wall coordinates against size in blocks, not the actual size

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Fixes crash when rotating a section of wall that is wider than YRES

Conflicts:

	src/save.c
This commit is contained in:
jacksonmj 2012-01-19 22:00:49 +00:00 committed by Simon Robertshaw
parent a27074fc47
commit 34c6043014
1 changed files with 136 additions and 0 deletions
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136
src/save.c
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@ -2170,3 +2170,139 @@ void *build_thumb(int *size, int bzip2)
*size = j;
return d;
}
void *transform_save(void *odata, int *size, matrix2d transform, vector2d translate)
{
void *ndata;
unsigned char (*bmapo)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(unsigned char));
unsigned char (*bmapn)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(unsigned char));
particle *partst = calloc(sizeof(particle), NPART);
sign *signst = calloc(MAXSIGNS, sizeof(sign));
unsigned (*pmapt)[XRES] = calloc(YRES*XRES, sizeof(unsigned));
float (*fvxo)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(float));
float (*fvyo)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(float));
float (*fvxn)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(float));
float (*fvyn)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(float));
float (*vxo)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(float));
float (*vyo)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(float));
float (*vxn)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(float));
float (*vyn)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(float));
float (*pvo)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(float));
float (*pvn)[XRES/CELL] = calloc((YRES/CELL)*(XRES/CELL), sizeof(float));
int i, x, y, nx, ny, w, h, nw, nh;
vector2d pos, tmp, ctl, cbr;
vector2d cornerso[4];
unsigned char *odatac = odata;
if (parse_save(odata, *size, 0, 0, 0, bmapo, vxo, vyo, pvo, fvxo, fvyo, signst, partst, pmapt))
{
free(bmapo);
free(bmapn);
free(partst);
free(signst);
free(pmapt);
free(fvxo);
free(fvyo);
free(fvxn);
free(fvyn);
free(vxo);
free(vyo);
free(vxn);
free(vyn);
free(pvo);
free(pvn);
return odata;
}
w = odatac[6]*CELL;
h = odatac[7]*CELL;
// undo any translation caused by rotation
cornerso[0] = v2d_new(0,0);
cornerso[1] = v2d_new(w-1,0);
cornerso[2] = v2d_new(0,h-1);
cornerso[3] = v2d_new(w-1,h-1);
for (i=0; i<4; i++)
{
tmp = m2d_multiply_v2d(transform,cornerso[i]);
if (i==0) ctl = cbr = tmp; // top left, bottom right corner
if (tmp.x<ctl.x) ctl.x = tmp.x;
if (tmp.y<ctl.y) ctl.y = tmp.y;
if (tmp.x>cbr.x) cbr.x = tmp.x;
if (tmp.y>cbr.y) cbr.y = tmp.y;
}
// casting as int doesn't quite do what we want with negative numbers, so use floor()
tmp = v2d_new(floor(ctl.x+0.5f),floor(ctl.y+0.5f));
translate = v2d_sub(translate,tmp);
nw = floor(cbr.x+0.5f)-floor(ctl.x+0.5f)+1;
nh = floor(cbr.y+0.5f)-floor(ctl.y+0.5f)+1;
if (nw>XRES) nw = XRES;
if (nh>YRES) nh = YRES;
// rotate and translate signs, parts, walls
for (i=0; i<MAXSIGNS; i++)
{
if (!signst[i].text[0]) continue;
pos = v2d_new(signst[i].x, signst[i].y);
pos = v2d_add(m2d_multiply_v2d(transform,pos),translate);
nx = floor(pos.x+0.5f);
ny = floor(pos.y+0.5f);
if (nx<0 || nx>=nw || ny<0 || ny>=nh)
{
signst[i].text[0] = 0;
continue;
}
signst[i].x = nx;
signst[i].y = ny;
}
for (i=0; i<NPART; i++)
{
if (!partst[i].type) continue;
pos = v2d_new(partst[i].x, partst[i].y);
pos = v2d_add(m2d_multiply_v2d(transform,pos),translate);
nx = floor(pos.x+0.5f);
ny = floor(pos.y+0.5f);
if (nx<0 || nx>=nw || ny<0 || ny>=nh)
{
partst[i].type = PT_NONE;
continue;
}
partst[i].x = nx;
partst[i].y = ny;
}
for (y=0; y<YRES/CELL; y++)
for (x=0; x<XRES/CELL; x++)
{
pos = v2d_new(x*CELL+CELL*0.4f, y*CELL+CELL*0.4f);
pos = v2d_add(m2d_multiply_v2d(transform,pos),translate);
nx = pos.x/CELL;
ny = pos.y/CELL;
if (nx<0 || nx>=nw/CELL || ny<0 || ny>=nh/CELL)
continue;
if (bmapo[y][x])
{
bmapn[ny][nx] = bmapo[y][x];
if (bmapo[y][x]==WL_FAN)
{
fvxn[ny][nx] = fvxo[y][x];
fvyn[ny][nx] = fvyo[y][x];
}
}
vxn[ny][nx] = vxo[y][x];
vyn[ny][nx] = vyo[y][x];
pvn[ny][nx] = pvo[y][x];
}
ndata = build_save(size,0,0,nw,nh,bmapn,vxn,vyn,pvn,fvxn,fvyn,signst,partst);
free(bmapo);
free(bmapn);
free(partst);
free(signst);
free(pmapt);
free(fvxo);
free(fvyo);
free(fvxn);
free(fvyn);
free(vxo);
free(vyo);
free(vxn);
free(vyn);
free(pvo);
free(pvn);
return ndata;
}