1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkSurfaceProps_DEFINED
#define SkSurfaceProps_DEFINED
#include "include/core/SkScalar.h"
#include "include/core/SkTypes.h"
#include "include/private/base/SkTo.h"
/**
* Description of how the LCD strips are arranged for each pixel. If this is unknown, or the
* pixels are meant to be "portable" and/or transformed before showing (e.g. rotated, scaled)
* then use kUnknown_SkPixelGeometry.
*/
enum SkPixelGeometry {
kUnknown_SkPixelGeometry,
kRGB_H_SkPixelGeometry,
kBGR_H_SkPixelGeometry,
kRGB_V_SkPixelGeometry,
kBGR_V_SkPixelGeometry,
};
// Returns true iff geo is a known geometry and is RGB.
static inline bool SkPixelGeometryIsRGB(SkPixelGeometry geo) {
return kRGB_H_SkPixelGeometry == geo || kRGB_V_SkPixelGeometry == geo;
}
// Returns true iff geo is a known geometry and is BGR.
static inline bool SkPixelGeometryIsBGR(SkPixelGeometry geo) {
return kBGR_H_SkPixelGeometry == geo || kBGR_V_SkPixelGeometry == geo;
}
// Returns true iff geo is a known geometry and is horizontal.
static inline bool SkPixelGeometryIsH(SkPixelGeometry geo) {
return kRGB_H_SkPixelGeometry == geo || kBGR_H_SkPixelGeometry == geo;
}
// Returns true iff geo is a known geometry and is vertical.
static inline bool SkPixelGeometryIsV(SkPixelGeometry geo) {
return kRGB_V_SkPixelGeometry == geo || kBGR_V_SkPixelGeometry == geo;
}
/**
* Describes properties and constraints of a given SkSurface. The rendering engine can parse these
* during drawing, and can sometimes optimize its performance (e.g. disabling an expensive
* feature).
*/
class SK_API SkSurfaceProps {
public:
enum Flags {
kDefault_Flag = 0,
kUseDeviceIndependentFonts_Flag = 1 << 0,
// Use internal MSAA to render to non-MSAA GPU surfaces.
kDynamicMSAA_Flag = 1 << 1,
// If set, all rendering will have dithering enabled
// Currently this only impacts GPU backends
kAlwaysDither_Flag = 1 << 2,
};
/** No flags, unknown pixel geometry, platform-default contrast/gamma. */
SkSurfaceProps();
/** TODO(kschmi): Remove this constructor and replace with the one below. **/
SkSurfaceProps(uint32_t flags, SkPixelGeometry);
/** Specified pixel geometry, text contrast, and gamma **/
SkSurfaceProps(uint32_t flags, SkPixelGeometry, SkScalar textContrast, SkScalar textGamma);
SkSurfaceProps(const SkSurfaceProps&) = default;
SkSurfaceProps& operator=(const SkSurfaceProps&) = default;
SkSurfaceProps cloneWithPixelGeometry(SkPixelGeometry newPixelGeometry) const {
return SkSurfaceProps(fFlags, newPixelGeometry, fTextContrast, fTextGamma);
}
static constexpr SkScalar kMaxContrastInclusive = 1;
static constexpr SkScalar kMinContrastInclusive = 0;
static constexpr SkScalar kMaxGammaExclusive = 4;
static constexpr SkScalar kMinGammaInclusive = 0;
uint32_t flags() const { return fFlags; }
SkPixelGeometry pixelGeometry() const { return fPixelGeometry; }
SkScalar textContrast() const { return fTextContrast; }
SkScalar textGamma() const { return fTextGamma; }
bool isUseDeviceIndependentFonts() const {
return SkToBool(fFlags & kUseDeviceIndependentFonts_Flag);
}
bool isAlwaysDither() const {
return SkToBool(fFlags & kAlwaysDither_Flag);
}
bool operator==(const SkSurfaceProps& that) const {
return fFlags == that.fFlags && fPixelGeometry == that.fPixelGeometry &&
fTextContrast == that.fTextContrast && fTextGamma == that.fTextGamma;
}
bool operator!=(const SkSurfaceProps& that) const {
return !(*this == that);
}
private:
uint32_t fFlags;
SkPixelGeometry fPixelGeometry;
// This gamma value is specifically about blending of mask coverage.
// The surface also has a color space, but that applies to the colors.
SkScalar fTextContrast;
SkScalar fTextGamma;
};
#endif
|
