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 #ifndef GrNativeRect_DEFINED 8 #define GrNativeRect_DEFINED 9 10 #include "include/core/SkRect.h" 11 #include "include/gpu/ganesh/GrTypes.h" 12 #include "include/private/base/SkAssert.h" 13 14 #include <cstddef> 15 #include <cstring> 16 17 /** 18 * Helper struct for dealing with bottom-up surface origins (bottom-up instead of top-down). 19 */ 20 struct GrNativeRect { 21 int fX; 22 int fY; 23 int fWidth; 24 int fHeight; 25 MakeRelativeToGrNativeRect26 static GrNativeRect MakeRelativeTo(GrSurfaceOrigin origin, int rtHeight, SkIRect devRect) { 27 GrNativeRect nativeRect; 28 nativeRect.setRelativeTo(origin, rtHeight, devRect); 29 return nativeRect; 30 } 31 MakeIRectRelativeToGrNativeRect32 static SkIRect MakeIRectRelativeTo(GrSurfaceOrigin origin, int rtHeight, SkIRect devRect) { 33 return MakeRelativeTo(origin, rtHeight, devRect).asSkIRect(); 34 } 35 36 /** 37 * cast-safe way to treat the rect as an array of (4) ints. 38 */ asIntsGrNativeRect39 const int* asInts() const { 40 return &fX; 41 42 static_assert(0 == offsetof(GrNativeRect, fX)); 43 static_assert(4 == offsetof(GrNativeRect, fY)); 44 static_assert(8 == offsetof(GrNativeRect, fWidth)); 45 static_assert(12 == offsetof(GrNativeRect, fHeight)); 46 static_assert(16 == sizeof(GrNativeRect)); // For an array of GrNativeRect. 47 } asIntsGrNativeRect48 int* asInts() { return &fX; } 49 asSkIRectGrNativeRect50 SkIRect asSkIRect() const { return SkIRect::MakeXYWH(fX, fY, fWidth, fHeight); } 51 52 // sometimes we have a SkIRect from the client that we 53 // want to simultaneously make relative to GL's viewport 54 // and (optionally) convert from top-down to bottom-up. 55 // The GL's viewport will always be the full size of the 56 // current render target so we just pass in the rtHeight 57 // here. setRelativeToGrNativeRect58 void setRelativeTo(GrSurfaceOrigin org, int rtHeight, const SkIRect& devRect) { 59 this->setRelativeTo(org, rtHeight, devRect.x(), devRect.y(), devRect.width(), 60 devRect.height()); 61 } 62 setRelativeToGrNativeRect63 void setRelativeTo(GrSurfaceOrigin origin, int surfaceHeight, int leftOffset, int topOffset, 64 int width, int height) { 65 fX = leftOffset; 66 fWidth = width; 67 if (kBottomLeft_GrSurfaceOrigin == origin) { 68 fY = surfaceHeight - topOffset - height; 69 } else { 70 fY = topOffset; 71 } 72 fHeight = height; 73 74 SkASSERT(fWidth >= 0); 75 SkASSERT(fHeight >= 0); 76 } 77 containsGrNativeRect78 bool contains(int width, int height) const { 79 return fX <= 0 && 80 fY <= 0 && 81 fX + fWidth >= width && 82 fY + fHeight >= height; 83 } 84 invalidateGrNativeRect85 void invalidate() {fX = fWidth = fY = fHeight = -1;} isInvalidGrNativeRect86 bool isInvalid() const { return fX == -1 && fWidth == -1 && fY == -1 87 && fHeight == -1; } 88 89 bool operator ==(const GrNativeRect& that) const { 90 return 0 == memcmp(this, &that, sizeof(GrNativeRect)); 91 } 92 93 bool operator !=(const GrNativeRect& that) const {return !(*this == that);} 94 }; 95 96 #endif 97