1 /* 2 * Copyright 2011 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 9 10 #ifndef GrNativeRect_DEFINED 11 #define GrNativeRect_DEFINED 12 13 #include "include/core/SkRect.h" 14 #include "include/gpu/GrTypes.h" 15 16 /** 17 * Helper struct for dealing with bottom-up surface origins (bottom-up instead of top-down). 18 */ 19 struct GrNativeRect { 20 int fX; 21 int fY; 22 int fWidth; 23 int fHeight; 24 MakeRelativeToGrNativeRect25 static GrNativeRect MakeRelativeTo(GrSurfaceOrigin origin, int rtHeight, SkIRect devRect) { 26 GrNativeRect nativeRect; 27 nativeRect.setRelativeTo(origin, rtHeight, devRect); 28 return nativeRect; 29 } 30 MakeIRectRelativeToGrNativeRect31 static SkIRect MakeIRectRelativeTo(GrSurfaceOrigin origin, int rtHeight, SkIRect devRect) { 32 return MakeRelativeTo(origin, rtHeight, devRect).asSkIRect(); 33 } 34 35 /** 36 * cast-safe way to treat the rect as an array of (4) ints. 37 */ asIntsGrNativeRect38 const int* asInts() const { 39 return &fX; 40 41 static_assert(0 == offsetof(GrNativeRect, fX)); 42 static_assert(4 == offsetof(GrNativeRect, fY)); 43 static_assert(8 == offsetof(GrNativeRect, fWidth)); 44 static_assert(12 == offsetof(GrNativeRect, fHeight)); 45 static_assert(16 == sizeof(GrNativeRect)); // For an array of GrNativeRect. 46 } asIntsGrNativeRect47 int* asInts() { return &fX; } 48 asSkIRectGrNativeRect49 SkIRect asSkIRect() const { return SkIRect::MakeXYWH(fX, fY, fWidth, fHeight); } 50 51 // sometimes we have a SkIRect from the client that we 52 // want to simultaneously make relative to GL's viewport 53 // and (optionally) convert from top-down to bottom-up. 54 // The GL's viewport will always be the full size of the 55 // current render target so we just pass in the rtHeight 56 // here. setRelativeToGrNativeRect57 void setRelativeTo(GrSurfaceOrigin org, int rtHeight, const SkIRect& devRect) { 58 this->setRelativeTo(org, rtHeight, devRect.x(), devRect.y(), devRect.width(), 59 devRect.height()); 60 } 61 setRelativeToGrNativeRect62 void setRelativeTo(GrSurfaceOrigin origin, int surfaceHeight, int leftOffset, int topOffset, 63 int width, int height) { 64 fX = leftOffset; 65 fWidth = width; 66 if (kBottomLeft_GrSurfaceOrigin == origin) { 67 fY = surfaceHeight - topOffset - height; 68 } else { 69 fY = topOffset; 70 } 71 fHeight = height; 72 73 SkASSERT(fWidth >= 0); 74 SkASSERT(fHeight >= 0); 75 } 76 containsGrNativeRect77 bool contains(int width, int height) const { 78 return fX <= 0 && 79 fY <= 0 && 80 fX + fWidth >= width && 81 fY + fHeight >= height; 82 } 83 invalidateGrNativeRect84 void invalidate() {fX = fWidth = fY = fHeight = -1;} isInvalidGrNativeRect85 bool isInvalid() const { return fX == -1 && fWidth == -1 && fY == -1 86 && fHeight == -1; } 87 88 bool operator ==(const GrNativeRect& that) const { 89 return 0 == memcmp(this, &that, sizeof(GrNativeRect)); 90 } 91 92 bool operator !=(const GrNativeRect& that) const {return !(*this == that);} 93 }; 94 95 #endif 96