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/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrRect_DEFINED
#define GrRect_DEFINED
#include "SkTypes.h"
#include "SkRect.h"
struct GrIRect16 {
int16_t fLeft, fTop, fRight, fBottom;
static GrIRect16 SK_WARN_UNUSED_RESULT MakeEmpty() {
GrIRect16 r;
r.setEmpty();
return r;
}
static GrIRect16 SK_WARN_UNUSED_RESULT MakeWH(int16_t w, int16_t h) {
GrIRect16 r;
r.set(0, 0, w, h);
return r;
}
static GrIRect16 SK_WARN_UNUSED_RESULT MakeXYWH(int16_t x, int16_t y, int16_t w, int16_t h) {
GrIRect16 r;
r.set(x, y, x + w, y + h);
return r;
}
int width() const { return fRight - fLeft; }
int height() const { return fBottom - fTop; }
int area() const { return this->width() * this->height(); }
bool isEmpty() const { return fLeft >= fRight || fTop >= fBottom; }
void setEmpty() { memset(this, 0, sizeof(*this)); }
void set(int16_t left, int16_t top, int16_t right, int16_t bottom) {
fLeft = left;
fTop = top;
fRight = right;
fBottom = bottom;
}
void set(const SkIRect& r) {
fLeft = SkToS16(r.fLeft);
fTop = SkToS16(r.fTop);
fRight = SkToS16(r.fRight);
fBottom = SkToS16(r.fBottom);
}
};
/** Returns true if the rectangles have a nonzero area of overlap. It assumed that rects can be
infinitely small but not "inverted". */
static inline bool GrRectsOverlap(const SkRect& a, const SkRect& b) {
// See skbug.com/6607 about the isFinite() checks.
SkASSERT(!a.isFinite() || (a.fLeft <= a.fRight && a.fTop <= a.fBottom));
SkASSERT(!b.isFinite() || (b.fLeft <= b.fRight && b.fTop <= b.fBottom));
return a.fRight > b.fLeft && a.fBottom > b.fTop && b.fRight > a.fLeft && b.fBottom > a.fTop;
}
/** Returns true if the rectangles overlap or share an edge or corner. It assumed that rects can be
infinitely small but not "inverted". */
static inline bool GrRectsTouchOrOverlap(const SkRect& a, const SkRect& b) {
// See skbug.com/6607 about the isFinite() checks.
SkASSERT(!a.isFinite() || (a.fLeft <= a.fRight && a.fTop <= a.fBottom));
SkASSERT(!b.isFinite() || (b.fLeft <= b.fRight && b.fTop <= b.fBottom));
return a.fRight >= b.fLeft && a.fBottom >= b.fTop && b.fRight >= a.fLeft && b.fBottom >= a.fTop;
}
#endif
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