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1 /*
2  * Copyright 2019 Google LLC
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 #ifndef GrImageInfo_DEFINED
9 #define GrImageInfo_DEFINED
10 
11 #include "include/core/SkImageInfo.h"
12 #include "include/private/GrTypesPriv.h"
13 #include "src/gpu/GrColorInfo.h"
14 
15 class GrImageInfo {
16 public:
17     GrImageInfo() = default;
18 
GrImageInfo(const SkImageInfo & info)19     /* implicit */ GrImageInfo(const SkImageInfo& info)
20             : fColorInfo(info.colorInfo()), fDimensions(info.dimensions()) {}
21 
GrImageInfo(GrColorType ct,SkAlphaType at,sk_sp<SkColorSpace> cs,int w,int h)22     GrImageInfo(GrColorType ct, SkAlphaType at, sk_sp<SkColorSpace> cs, int w, int h)
23             : fColorInfo(ct, at, std::move(cs)), fDimensions{w,h} {}
24 
GrImageInfo(GrColorType ct,SkAlphaType at,sk_sp<SkColorSpace> cs,const SkISize & dimensions)25     GrImageInfo(GrColorType ct, SkAlphaType at, sk_sp<SkColorSpace> cs, const SkISize& dimensions)
26             : fColorInfo(ct, at, std::move(cs)), fDimensions(dimensions) {}
27 
GrImageInfo(const GrColorInfo & info,const SkISize & dimensions)28     GrImageInfo(const GrColorInfo& info, const SkISize& dimensions)
29             : fColorInfo(info), fDimensions(dimensions) {}
30 
GrImageInfo(GrColorInfo && info,const SkISize & dimensions)31     GrImageInfo(GrColorInfo&& info, const SkISize& dimensions)
32             : fColorInfo(std::move(info)), fDimensions(dimensions) {}
33 
34     GrImageInfo(const GrImageInfo&) = default;
35     GrImageInfo(GrImageInfo&&) = default;
36     GrImageInfo& operator=(const GrImageInfo&) = default;
37     GrImageInfo& operator=(GrImageInfo&&) = default;
38 
makeColorType(GrColorType ct)39     GrImageInfo makeColorType(GrColorType ct) const {
40         return {ct, this->alphaType(), this->refColorSpace(), this->width(), this->height()};
41     }
42 
makeAlphaType(SkAlphaType at)43     GrImageInfo makeAlphaType(SkAlphaType at) const {
44         return {this->colorType(), at, this->refColorSpace(), this->width(), this->height()};
45     }
46 
makeWH(int width,int height)47     GrImageInfo makeWH(int width, int height) const {
48         return {this->colorType(), this->alphaType(), this->refColorSpace(), width, height};
49     }
50 
colorInfo()51     const GrColorInfo& colorInfo() const { return fColorInfo; }
52 
colorType()53     GrColorType colorType() const { return fColorInfo.colorType(); }
54 
alphaType()55     SkAlphaType alphaType() const { return fColorInfo.alphaType(); }
56 
colorSpace()57     SkColorSpace* colorSpace() const { return fColorInfo.colorSpace(); }
58 
refColorSpace()59     sk_sp<SkColorSpace> refColorSpace() const { return fColorInfo.refColorSpace(); }
60 
dimensions()61     SkISize dimensions() const { return fDimensions; }
62 
width()63     int width() const { return fDimensions.width(); }
64 
height()65     int height() const { return fDimensions.height(); }
66 
bpp()67     size_t bpp() const { return GrColorTypeBytesPerPixel(this->colorType()); }
68 
minRowBytes()69     size_t minRowBytes() const { return this->bpp() * this->width(); }
70 
71     /**
72      * Place this image rect in a surface of dimensions surfaceWidth x surfaceHeight size offset at
73      * surfacePt and then clip the pixel rectangle to the bounds of the surface. If the pixel rect
74      * does not intersect the rectangle or is empty then return false. If clipped, the input
75      * surfacePt, the width/height of this GrImageInfo, and the data pointer will be modified to
76      * reflect the clipped rectangle.
77      */
78     template <typename T>
clip(int surfaceWidth,int surfaceHeight,SkIPoint * surfacePt,T ** data,size_t rowBytes)79     bool clip(int surfaceWidth, int surfaceHeight, SkIPoint* surfacePt, T** data, size_t rowBytes) {
80         auto bounds = SkIRect::MakeWH(surfaceWidth, surfaceHeight);
81         auto rect = SkIRect::MakeXYWH(surfacePt->fX, surfacePt->fY, this->width(), this->height());
82         if (!rect.intersect(bounds)) {
83             return false;
84         }
85         *data = SkTAddOffset<T>(*data, (rect.fTop  - surfacePt->fY) * rowBytes +
86                                        (rect.fLeft - surfacePt->fX) * this->bpp());
87         surfacePt->fX = rect.fLeft;
88         surfacePt->fY = rect.fTop;
89         fDimensions = rect.size();
90         return true;
91     }
92 
isValid()93     bool isValid() const { return fColorInfo.isValid() && this->width() > 0 && this->height() > 0; }
94 
95 private:
96     GrColorInfo fColorInfo = {};
97     SkISize fDimensions;
98 };
99 
100 #endif
101