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
|
#include "stdafx.h"
#include "Image.h"
namespace storm {
using namespace geometry;
inline Color toColor(byte *src) {
return Color(src[0], src[1], src[2], src[3]);
}
inline byte toByte(float f) {
return byte(f * 255.0f);
}
inline void fromColor(const Color &src, byte *dest) {
dest[0] = toByte(src.r);
dest[1] = toByte(src.g);
dest[2] = toByte(src.b);
dest[3] = toByte(src.a);
}
Image::Image() : data(null), w(0), h(0) {}
Image::Image(const Image &o) : data(null), w(o.w), h(o.h) {
Nat s = w * h * 4;
data = runtime::allocBuffer(engine(), s);
memcpy(data->v, o.data->v, s);
}
Image::Image(Size size) : data(null), w(Nat(size.w)), h(Nat(size.h)) {
Nat s = w * h * 4;
data = runtime::allocBuffer(engine(), s);
}
Image::Image(Nat w, Nat h) : data(null), w(w), h(h) {
Nat s = w * h * 4;
data = runtime::allocBuffer(engine(), s);
}
geometry::Size Image::size() {
return geometry::Size(Float(w), Float(h));
}
Nat Image::offset(Nat x, Nat y) {
return (y * w + x) * 4;
}
Color Image::get(Nat x, Nat y) {
if (x >= w || y >= h)
return Color();
return toColor(data->v + offset(x, y));
}
Color Image::get(Point p) {
// TODO? Interpolate colors?
return get(Nat(p.x), Nat(p.y));
}
void Image::set(Nat x, Nat y, Color c) {
if (x >= w || y >= h)
return;
fromColor(c, data->v + offset(x, y));
}
void Image::set(Point p, Color c) {
set(Nat(p.x), Nat(p.y), c);
}
Bool Image::hasAlpha() {
for (Nat y = 0; y < h; y++) {
for (Nat x = 0; x < w; x++) {
byte *b = buffer(x, y);
if (b[3] != 255)
return true;
}
}
return false;
}
Nat Image::stride() const {
return w * 4;
}
Nat Image::bufferSize() const {
return w * h * 4;
}
byte *Image::buffer() {
return data->v;
}
byte *Image::buffer(Nat x, Nat y) {
return data->v + offset(x, y);
}
void Image::vflip() {
Nat halfHeight = h / 2;
for (Nat y = 0; y < halfHeight; y++) {
for (Nat x = 0; x < w; x++) {
byte *a = buffer(x, y);
byte *b = buffer(x, h - y - 1);
swap(a[0], b[0]);
swap(a[1], b[1]);
swap(a[2], b[2]);
swap(a[3], b[3]);
}
}
}
}
|
