pandory500/SDL-mirror
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Center the old SDL 1.2 screen in the window if we can't get the size we wanted.

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This commit is contained in:
Sam Lantinga 2011-02-13 23:09:18 -08:00
parent 98f0920828
commit 72cdb910fb
4 changed files with 170 additions and 51 deletions
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39
src/video/SDL_rect.c
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@ -23,6 +23,7 @@
#include "SDL_rect.h"
SDL_bool
SDL_HasIntersection(const SDL_Rect * A, const SDL_Rect * B)
{
@ -339,4 +340,42 @@ SDL_IntersectRectAndLine(const SDL_Rect * rect, int *X1, int *Y1, int *X2,
return SDL_TRUE;
}
SDL_bool
SDL_GetSpanEnclosingRect(int width, int height,
int numrects, SDL_Rect * rects, SDL_Rect *span)
{
int i;
int span_y1, span_y2;
int rect_y1, rect_y2;
/* Initialize to empty rect */
span_y1 = height;
span_y2 = 0;
for (i = 0; i < numrects; ++i) {
rect_y1 = rects[i].y;
rect_y2 = rect_y1 + rects[i].h;
/* Clip out of bounds rectangles, and expand span rect */
if (rect_y1 < 0) {
span_y1 = 0;
} else if (rect_y1 < span_y1) {
span_y1 = rect_y1;
}
if (rect_y2 > height) {
span_y2 = height;
} else if (rect_y2 > span_y2) {
span_y2 = rect_y2;
}
}
if (span_y2 > span_y1) {
span->x = 0;
span->y = span_y1;
span->w = width;
span->h = (span_y2 - span_y1);
return SDL_TRUE;
}
return SDL_FALSE;
}
/* vi: set ts=4 sw=4 expandtab: */