D2Patch/D2PTextureDescriptor.m at master · chestnut42/D2Patch · GitHub

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
//
//  D2PTextureDescriptor.m
//  D2Patch
//
//  Created by Andrey on 23/02/2017.
//

#import "D2PTextureDescriptor.h"


@implementation D2PTextureDescriptor

@synthesize width = _width;
@synthesize height = _height;
@synthesize format = _format;
@synthesize type = _type;
@synthesize pixels = _pixels;
@synthesize textureHash = _textureHash;


- (instancetype) initWithData:(const GLvoid *)pixels
                        width:(GLsizei)width
                       height:(GLsizei)height
                       format:(GLenum)format
                         type:(GLenum)type
{
    self = [super init];
    if (self)
    {
        _width = width;
        _height = height;
        _format = format;
        _type = type;
        _pixels = pixels;

        _textureHash = [[D2PTextureHash alloc] initWithData:pixels length:self.size];
    }

    return self;
}


- (BOOL) isEqual:(id)object
{
    if ([object isMemberOfClass:[D2PTextureDescriptor class]])
    {
        D2PTextureDescriptor *otherDescriptor = (D2PTextureDescriptor *) object;

        return _width == otherDescriptor->_width
        && _height == otherDescriptor->_height
        && _format == otherDescriptor->_format
        && _type == otherDescriptor->_type
        && _pixels == otherDescriptor->_pixels;
    }
    else
    {
        return NO;
    }
}


- (NSUInteger) hash
{
    return @(_width).hash
    + @(_height).hash
    + @(_format).hash
    + @(_type).hash
    + ((NSUInteger) _pixels);
}


- (NSUInteger) bytesPerPixel
{
    switch (self.type)
    {
        case GL_UNSIGNED_SHORT_1_5_5_5_REV:
            return 2;

        default:
            [NSException raise:@"Fatal error" format:@"Unknow texture size"];
            return 0;
    }
}


- (NSUInteger) area
{
    return self.width * self.height;
}


- (NSUInteger) size
{
    return self.area * self.bytesPerPixel;
}


@end