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Finished viewport_render decompile.

This commit is contained in:
Duncan Frost 2014-07-11 18:32:32 +01:00
parent 777390c4b0
commit 144470e5aa
1 changed files with 61 additions and 1 deletions
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62
src/viewport.c
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@ -109,10 +109,70 @@ void viewport_update_position(rct_window *window)
/**
*
* rct2: 0x00685C02
* ax: left
* bx: top
* dx: right
* esi: viewport
* edi: dpi
* ebp: bottom
*/
void viewport_render(rct_drawpixelinfo *dpi, rct_viewport *viewport, int left, int top, int right, int bottom)
{
RCT2_CALLPROC_X(0x00685C02, left , top, 0, right, (int)viewport, (int)dpi, bottom);
if (right <= viewport->x) return;
if (bottom <= viewport->y) return;
if (left >= viewport->x + viewport->width )return;
if (top >= viewport->y + viewport->height )return;
//ax
int x_end = left;
if (left < viewport->x){
x_end = viewport->x;
}
//dx
int x_start = right;
if (right > viewport->x + viewport->width){
x_start = viewport->x + viewport->width;
}
//bx
int y_end = top;
if (top < viewport->y){
y_end = viewport->y;
}
//bp
int y_start = bottom;
if (bottom > viewport->y + viewport->height){
y_start = viewport->y + viewport->height;
}
x_end -= viewport->x;
x_start -= viewport->x;
y_end -= viewport->y;
y_start -= viewport->y;
x_end <<= viewport->zoom;
x_start <<= viewport->zoom;
y_end <<= viewport->zoom;
y_start <<= viewport->zoom;
x_end += viewport->view_x;
x_start += viewport->view_x;
y_end += viewport->view_y;
y_start += viewport->view_y;
//cx
int height = y_start - y_end;
if (height > 384){
RCT2_CALLPROC_X(0x00685CBF, x_end, y_end, height, x_start, (int)viewport, (int)dpi, y_end + 384);
y_end += 384;
}
RCT2_CALLPROC_X(0x00685CBF, x_end, y_end, height, x_start, (int)viewport, (int)dpi, y_start);
}
/**