mirror of https://github.com/OpenRCT2/OpenRCT2.git
Merge pull request #1 from duncanspumpkin/viewport
Fix viewport tearing issue
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commit
6a73debc67
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@ -298,8 +298,8 @@ void sub_689174(sint16* x, sint16* y, sint16 *z, uint8 curr_rotation){
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//
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//}
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void sub_6E7F34(sint16 previous_x, sint16 previous_y, rct_window* w, rct_viewport* viewport){
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//RCT2_CALLPROC_X(0x6E7F34, 0, 0, 0, previous_x, (int)viewport, (int)w, previous_y);
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void sub_6E7F34(rct_window* w, rct_viewport* viewport, sint16 x_diff, sint16 y_diff){
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//RCT2_CALLPROC_X(0x6E7F34, 0, 0, 0, x_diff, (int)viewport, (int)w, y_diff);
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rct_window* orignal_w = w;
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int left = 0, right = 0, top = 0, bottom = 0;
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@ -318,11 +318,11 @@ void sub_6E7F34(sint16 previous_x, sint16 previous_y, rct_window* w, rct_viewpor
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top = w->y;
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bottom = w->y + w->height;
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if (left >= viewport->x)left = viewport->x;
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if (right >= viewport->x + viewport->width) right = viewport->x + viewport->width;
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if (left < viewport->x)left = viewport->x;
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if (right > viewport->x + viewport->width) right = viewport->x + viewport->width;
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if (top >= viewport->y)top = viewport->y;
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if (bottom >= viewport->y + viewport->height) bottom = viewport->y + viewport->height;
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if (top < viewport->y)top = viewport->y;
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if (bottom > viewport->y + viewport->height) bottom = viewport->y + viewport->height;
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if (left >= right) continue;
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if (top >= bottom) continue;
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@ -331,7 +331,7 @@ void sub_6E7F34(sint16 previous_x, sint16 previous_y, rct_window* w, rct_viewpor
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}
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w = orignal_w;
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RCT2_CALLPROC_X(0x6E7FF3, 0, 0, 0, previous_x, (int)viewport, (int)w, previous_y);
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RCT2_CALLPROC_X(0x6E7FF3, 0, 0, 0, x_diff, (int)viewport, (int)w, y_diff);
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}
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/* There is a bug in this. */
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@ -340,13 +340,14 @@ void sub_6E7DE1(sint16 x, sint16 y, rct_window* w, rct_viewport* viewport){
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//return;
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uint8 zoom = (1 << viewport->zoom);
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sint16 previous_x = viewport->view_x / zoom;
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sint16 previous_y = viewport->view_y / zoom;
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sint16 x_diff = (viewport->view_x - x) / zoom;
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sint16 y_diff = (viewport->view_y - y) / zoom;
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viewport->view_x = x;
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viewport->view_y = y;
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if (((x / zoom) == previous_x) && ((y / zoom) == previous_y)) return;
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// If no change in viewing area
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if ((!x_diff) && (!y_diff))return;
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if (w->flags & WF_7){
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int left = max(viewport->x, 0);
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@ -400,8 +401,8 @@ void sub_6E7DE1(sint16 x, sint16 y, rct_window* w, rct_viewport* viewport){
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return;
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}
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sub_6E7F34(previous_x, previous_y, w, viewport);
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//RCT2_CALLPROC_X(0x6E7F34, 0, 0, 0, previous_x, (int)viewport, (int)w, previous_y);
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sub_6E7F34(w, viewport, x_diff, y_diff);
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//RCT2_CALLPROC_X(0x6E7F34, 0, 0, 0, x_diff, (int)viewport, (int)w, y_diff);
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memcpy(viewport, &view_copy, sizeof(rct_viewport));
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}
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