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 org, int rtHeight, const SkIRect& devRect) { 26 GrNativeRect nativeRect; 27 nativeRect.setRelativeTo(org, rtHeight, devRect); 28 return nativeRect; 29 } 30 MakeRelativeToGrNativeRect31 static GrNativeRect MakeRelativeTo(GrSurfaceOrigin origin, int surfaceHeight, int leftOffset, 32 int topOffset, int width, int height) { 33 GrNativeRect nativeRect; 34 nativeRect.setRelativeTo(origin, surfaceHeight, leftOffset, topOffset, width, height); 35 return nativeRect; 36 } 37 38 /** 39 * cast-safe way to treat the rect as an array of (4) ints. 40 */ asIntsGrNativeRect41 const int* asInts() const { 42 return &fX; 43 44 static_assert(0 == offsetof(GrNativeRect, fX)); 45 static_assert(4 == offsetof(GrNativeRect, fY)); 46 static_assert(8 == offsetof(GrNativeRect, fWidth)); 47 static_assert(12 == offsetof(GrNativeRect, fHeight)); 48 static_assert(16 == sizeof(GrNativeRect)); // For an array of GrNativeRect. 49 } asIntsGrNativeRect50 int* asInts() { return &fX; } 51 asSkIRectGrNativeRect52 SkIRect asSkIRect() const { return SkIRect::MakeXYWH(fX, fY, fWidth, fHeight); } 53 54 // sometimes we have a SkIRect from the client that we 55 // want to simultaneously make relative to GL's viewport 56 // and (optionally) convert from top-down to bottom-up. 57 // The GL's viewport will always be the full size of the 58 // current render target so we just pass in the rtHeight 59 // here. setRelativeToGrNativeRect60 void setRelativeTo(GrSurfaceOrigin org, int rtHeight, const SkIRect& devRect) { 61 this->setRelativeTo(org, rtHeight, devRect.x(), devRect.y(), devRect.width(), 62 devRect.height()); 63 } 64 setRelativeToGrNativeRect65 void setRelativeTo(GrSurfaceOrigin origin, int surfaceHeight, int leftOffset, int topOffset, 66 int width, int height) { 67 fX = leftOffset; 68 fWidth = width; 69 if (kBottomLeft_GrSurfaceOrigin == origin) { 70 fY = surfaceHeight - topOffset - height; 71 } else { 72 fY = topOffset; 73 } 74 fHeight = height; 75 76 SkASSERT(fWidth >= 0); 77 SkASSERT(fHeight >= 0); 78 } 79 containsGrNativeRect80 bool contains(int width, int height) const { 81 return fX <= 0 && 82 fY <= 0 && 83 fX + fWidth >= width && 84 fY + fHeight >= height; 85 } 86 invalidateGrNativeRect87 void invalidate() {fX = fWidth = fY = fHeight = -1;} isInvalidGrNativeRect88 bool isInvalid() const { return fX == -1 && fWidth == -1 && fY == -1 89 && fHeight == -1; } 90 91 bool operator ==(const GrNativeRect& that) const { 92 return 0 == memcmp(this, &that, sizeof(GrNativeRect)); 93 } 94 95 bool operator !=(const GrNativeRect& that) const {return !(*this == that);} 96 }; 97 98 #endif 99