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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrNativeRect_DEFINED
#define GrNativeRect_DEFINED
#include "include/core/SkRect.h"
#include "include/gpu/GrTypes.h"
/**
* Helper struct for dealing with bottom-up surface origins (bottom-up instead of top-down).
*/
struct GrNativeRect {
int fX;
int fY;
int fWidth;
int fHeight;
static GrNativeRect MakeRelativeTo(GrSurfaceOrigin org, int rtHeight, const SkIRect& devRect) {
GrNativeRect nativeRect;
nativeRect.setRelativeTo(org, rtHeight, devRect);
return nativeRect;
}
static GrNativeRect MakeRelativeTo(GrSurfaceOrigin origin, int surfaceHeight, int leftOffset,
int topOffset, int width, int height) {
GrNativeRect nativeRect;
nativeRect.setRelativeTo(origin, surfaceHeight, leftOffset, topOffset, width, height);
return nativeRect;
}
/**
* cast-safe way to treat the rect as an array of (4) ints.
*/
const int* asInts() const {
return &fX;
GR_STATIC_ASSERT(0 == offsetof(GrNativeRect, fX));
GR_STATIC_ASSERT(4 == offsetof(GrNativeRect, fY));
GR_STATIC_ASSERT(8 == offsetof(GrNativeRect, fWidth));
GR_STATIC_ASSERT(12 == offsetof(GrNativeRect, fHeight));
GR_STATIC_ASSERT(16 == sizeof(GrNativeRect)); // For an array of GrNativeRect.
}
int* asInts() { return &fX; }
SkIRect asSkIRect() const { return SkIRect::MakeXYWH(fX, fY, fWidth, fHeight); }
// sometimes we have a SkIRect from the client that we
// want to simultaneously make relative to GL's viewport
// and (optionally) convert from top-down to bottom-up.
// The GL's viewport will always be the full size of the
// current render target so we just pass in the rtHeight
// here.
void setRelativeTo(GrSurfaceOrigin org, int rtHeight, const SkIRect& devRect) {
this->setRelativeTo(org, rtHeight, devRect.x(), devRect.y(), devRect.width(),
devRect.height());
}
void setRelativeTo(GrSurfaceOrigin origin, int surfaceHeight, int leftOffset, int topOffset,
int width, int height) {
fX = leftOffset;
fWidth = width;
if (kBottomLeft_GrSurfaceOrigin == origin) {
fY = surfaceHeight - topOffset - height;
} else {
fY = topOffset;
}
fHeight = height;
SkASSERT(fWidth >= 0);
SkASSERT(fHeight >= 0);
}
bool contains(int width, int height) const {
return fX <= 0 &&
fY <= 0 &&
fX + fWidth >= width &&
fY + fHeight >= height;
}
void invalidate() {fX = fWidth = fY = fHeight = -1;}
bool isInvalid() const { return fX == -1 && fWidth == -1 && fY == -1
&& fHeight == -1; }
bool operator ==(const GrNativeRect& that) const {
return 0 == memcmp(this, &that, sizeof(GrNativeRect));
}
bool operator !=(const GrNativeRect& that) const {return !(*this == that);}
};
#endif
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