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First draft of draw_quadrant

This commit is contained in:
Duncan Frost 2014-07-22 19:09:26 +01:00
parent 03f4c2e57e
commit d97c0b4679
1 changed files with 140 additions and 1 deletions
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141
src/viewport.c
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@ -285,6 +285,144 @@ void sub_0x68615B(int ebp){
RCT2_GLOBAL(0xF1AD24, uint32) = 0;
}
/**
*
* rct2: 0x0068615B
* ebp: ebp
*/
void sub_0x68B6C2(){
rct_drawpixelinfo* dpi = RCT2_GLOBAL(0x140E9A8, rct_drawpixelinfo*);
sint16 ax, bx, cx, dx;
switch (RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_ROTATION, uint32)){
case 0:
ax = dpi->y;
bx = dpi->x;
ax -= 16;
bx &= 0xFFE0;
ax &= 0xFFE0;
bx >>= 1;
cx = ax;
ax -= bx;
cx += bx;
ax &= 0xFFE0;
cx &= 0xFFE0;
dx = dpi->height;
dx += 2128;
dx >>= 5;
for (int i = dx; i > 0; --i){
RCT2_CALLPROC_X(0x68B35F, ax, 0, cx, 0, 0, 0, 0);
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
cx += 0x20;
ax -= 0x20;
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
ax += 0x20;
RCT2_CALLPROC_X(0x68B35F, ax, 0, cx, 0, 0, 0, 0);
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
ax += 0x20;
cx -= 0x20;
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
cx += 0x20;
}
break;
case 1:
ax = dpi->y;
bx = dpi->x;
ax -= 0x10;
bx &= 0xFFE0;
ax &= 0xFFE0;
bx >>= 1;
cx = ax;
ax = -ax;
ax -= bx;
cx -= bx;
cx -= 0x10;
ax &= 0xFFE0;
cx &= 0xFFE0;
dx = dpi->height;
dx += 0x860;
dx >>= 5;
for (int i = dx; i > 0; i--){
RCT2_CALLPROC_X(0x68B35F, ax, 0, cx, 0, 0, 0, 0);
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
ax -= 0x20;
cx -= 0x20;
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
cx += 0x20;
RCT2_CALLPROC_X(0x68B35F, ax, 0, cx, 0, 0, 0, 0);
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
ax += 0x20;
cx += 0x20;
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
ax -= 0x20;
}
break;
case 2:
ax = dpi->y;
bx = dpi->x;
ax -= 0x10;
bx &= 0xFFE0;
ax &= 0xFFE0;
bx >>= 1;
ax = -ax;
cx = ax;
ax += bx;
cx -= bx;
ax &= 0xFFE0;
cx &= 0xFFE0;
dx = dpi->height;
dx += 0x860;
dx >>= 5;
for (int i = dx; i > 0; i--){
RCT2_CALLPROC_X(0x68B35F, ax, 0, cx, 0, 0, 0, 0);
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
ax += 0x20;
cx -= 0x20;
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
ax -= 0x20;
RCT2_CALLPROC_X(0x68B35F, ax, 0, cx, 0, 0, 0, 0);
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
ax -= 0x20;
cx += 0x20;
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
cx -= 0x20;
}
break;
case 3:
ax = dpi->y;
bx = dpi->x;
ax -= 0x10;
bx &= 0xFFE0;
ax &= 0xFFE0;
bx >>= 1;
cx = ax;
ax += bx;
cx = -cx;
cx += bx;
cx -= 0x10;
ax &= 0xFFE0;
cx &= 0xFFE0;
dx = dpi->height;
dx += 0x860;
dx >>= 5;
for (int i = dx; i > 0; i--){
int esi, ebp;
RCT2_CALLPROC_X(0x68B35F, ax, 0, cx, 0, 0, 0, 0);
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
ax += 0x20;
cx += 0x20;
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
cx -= 0x20;
RCT2_CALLPROC_X(0x68B35F, ax, 0, cx, 0, 0, 0, 0);
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
ax -= 0x20;
cx -= 0x20;
RCT2_CALLPROC_X(0x69E8B0, ax, 0, cx, 0, 0, 0, 0);
ax += 0x20;
}
break;
}
}
/**
*
@ -377,7 +515,8 @@ void viewport_paint(rct_viewport* viewport, rct_drawpixelinfo* dpi, int left, in
RCT2_GLOBAL(0x140E9A8, uint32) = (int)dpi2;
int ebp = 0, ebx = 0, esi = 0, ecx = 0;
sub_0x68615B(0xEE788C); //Memory copy
RCT2_CALLFUNC_X(0x68B6C2, &start_x, &ebx, &ecx, (int*)&bits_pointer, &esi, (int*)&dpi2, &ebp); //Big function call 4 rotation versions
sub_0x68B6C2();
//RCT2_CALLPROC_X(0x68B6C2, 0, 0, 0, 0, 0, 0, 0); //Big function call 4 rotation versions
RCT2_CALLFUNC_X(0x688217, &start_x, &ebx, &ecx, (int*)&bits_pointer, &esi, (int*)&dpi2, &ebp); //Move memory
RCT2_CALLFUNC_X(0x688485, &start_x, &ebx, &ecx, (int*)&bits_pointer, &esi, (int*)&dpi2, &ebp); //Big function call