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Merge pull request #1 from duncanspumpkin/viewport 

Fix viewport tearing issue
This commit is contained in:
Adrian Wielgosik 2014-12-17 23:23:20 +01:00
parent 7611cd0ad6 c0378279f8
commit 6a73debc67
1 changed files with 13 additions and 12 deletions
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25
src/interface/viewport.c
View File

@ -298,8 +298,8 @@ void sub_689174(sint16* x, sint16* y, sint16 *z, uint8 curr_rotation){
//
//}
void sub_6E7F34(sint16 previous_x, sint16 previous_y, rct_window* w, rct_viewport* viewport){
//RCT2_CALLPROC_X(0x6E7F34, 0, 0, 0, previous_x, (int)viewport, (int)w, previous_y);
void sub_6E7F34(rct_window* w, rct_viewport* viewport, sint16 x_diff, sint16 y_diff){
//RCT2_CALLPROC_X(0x6E7F34, 0, 0, 0, x_diff, (int)viewport, (int)w, y_diff);
rct_window* orignal_w = w;
int left = 0, right = 0, top = 0, bottom = 0;
@ -318,11 +318,11 @@ void sub_6E7F34(sint16 previous_x, sint16 previous_y, rct_window* w, rct_viewpor
top = w->y;
bottom = w->y + w->height;
if (left >= viewport->x)left = viewport->x;
if (right >= viewport->x + viewport->width) right = viewport->x + viewport->width;
if (left < viewport->x)left = viewport->x;
if (right > viewport->x + viewport->width) right = viewport->x + viewport->width;
if (top >= viewport->y)top = viewport->y;
if (bottom >= viewport->y + viewport->height) bottom = viewport->y + viewport->height;
if (top < viewport->y)top = viewport->y;
if (bottom > viewport->y + viewport->height) bottom = viewport->y + viewport->height;
if (left >= right) continue;
if (top >= bottom) continue;
@ -331,7 +331,7 @@ void sub_6E7F34(sint16 previous_x, sint16 previous_y, rct_window* w, rct_viewpor
}
w = orignal_w;
RCT2_CALLPROC_X(0x6E7FF3, 0, 0, 0, previous_x, (int)viewport, (int)w, previous_y);
RCT2_CALLPROC_X(0x6E7FF3, 0, 0, 0, x_diff, (int)viewport, (int)w, y_diff);
}
/* There is a bug in this. */
@ -340,13 +340,14 @@ void sub_6E7DE1(sint16 x, sint16 y, rct_window* w, rct_viewport* viewport){
//return;
uint8 zoom = (1 << viewport->zoom);
sint16 previous_x = viewport->view_x / zoom;
sint16 previous_y = viewport->view_y / zoom;
sint16 x_diff = (viewport->view_x - x) / zoom;
sint16 y_diff = (viewport->view_y - y) / zoom;
viewport->view_x = x;
viewport->view_y = y;
if (((x / zoom) == previous_x) && ((y / zoom) == previous_y)) return;
// If no change in viewing area
if ((!x_diff) && (!y_diff))return;
if (w->flags & WF_7){
int left = max(viewport->x, 0);
@ -400,8 +401,8 @@ void sub_6E7DE1(sint16 x, sint16 y, rct_window* w, rct_viewport* viewport){
return;
}
sub_6E7F34(previous_x, previous_y, w, viewport);
//RCT2_CALLPROC_X(0x6E7F34, 0, 0, 0, previous_x, (int)viewport, (int)w, previous_y);
sub_6E7F34(w, viewport, x_diff, y_diff);
//RCT2_CALLPROC_X(0x6E7F34, 0, 0, 0, x_diff, (int)viewport, (int)w, y_diff);
memcpy(viewport, &view_copy, sizeof(rct_viewport));
}