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New front end functions to save and restore a region of the puzzle

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bitmap. Can be used to implement sprite-like animations: for
example, useful for games that wish to implement a user interface
which involves dragging an object around the playing area.

[originally from svn r5987]
This commit is contained in:
Simon Tatham
2005-06-22 08:30:31 +00:00
parent 64fbdf60ee
commit b176767dfa
4 changed files with 186 additions and 0 deletions
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42
osx.m
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@ -1232,6 +1232,48 @@ void draw_text(frontend *fe, int x, int y, int fonttype, int fontsize,
[string drawAtPoint:point withAttributes:attr];
}
struct blitter {
int w, h;
int x, y;
NSImage *img;
};
blitter *blitter_new(int w, int h)
{
blitter *bl = snew(blitter);
bl->x = bl->y = -1;
bl->w = w;
bl->h = h;
bl->img = [[NSImage alloc] initWithSize:NSMakeSize(w, h)];
[bl->img setFlipped:YES];
return bl;
}
void blitter_free(blitter *bl)
{
[bl->img release];
sfree(bl);
}
void blitter_save(frontend *fe, blitter *bl, int x, int y)
{
[fe->image unlockFocus];
[bl->img lockFocus];
[fe->image drawInRect:NSMakeRect(0, 0, bl->w, bl->h)
fromRect:NSMakeRect(x, y, bl->w, bl->h)
operation:NSCompositeCopy fraction:1.0];
[bl->img unlockFocus];
[fe->image lockFocus];
bl->x = x;
bl->y = y;
}
void blitter_load(frontend *fe, blitter *bl, int x, int y)
{
if (x == BLITTER_FROMSAVED && y == BLITTER_FROMSAVED) {
x = bl->x;
y = bl->y;
}
[bl->img drawInRect:NSMakeRect(x, y, bl->w, bl->h)
fromRect:NSMakeRect(0, 0, bl->w, bl->h)
operation:NSCompositeCopy fraction:1.0];
}
void draw_update(frontend *fe, int x, int y, int w, int h)
{
[fe->view setNeedsDisplayInRect:NSMakeRect(x,y,w,h)];