xref: /third_party/skia/src/c/sk_imageinfo.cpp (revision cb93a386) 
1/*
2 * Copyright 2018 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#include "include/core/SkColorSpace.h"
9#include "include/core/SkImageInfo.h"
10
11#include "include/c/sk_colorspace.h"
12#include "include/c/sk_imageinfo.h"
13
14const struct {
15    sk_colortype_t  fC;
16    SkColorType     fSK;
17} gColorTypeMap[] = {
18    { UNKNOWN_SK_COLORTYPE,     kUnknown_SkColorType    },
19    { RGBA_8888_SK_COLORTYPE,   kRGBA_8888_SkColorType  },
20    { BGRA_8888_SK_COLORTYPE,   kBGRA_8888_SkColorType  },
21    { ALPHA_8_SK_COLORTYPE,     kAlpha_8_SkColorType    },
22    { GRAY_8_SK_COLORTYPE,      kGray_8_SkColorType     },
23    { RGBA_F16_SK_COLORTYPE,    kRGBA_F16_SkColorType   },
24    { RGBA_F32_SK_COLORTYPE,    kRGBA_F32_SkColorType   },
25};
26
27const struct {
28    sk_alphatype_t  fC;
29    SkAlphaType     fSK;
30} gAlphaTypeMap[] = {
31    { OPAQUE_SK_ALPHATYPE,      kOpaque_SkAlphaType     },
32    { PREMUL_SK_ALPHATYPE,      kPremul_SkAlphaType     },
33    { UNPREMUL_SK_ALPHATYPE,    kUnpremul_SkAlphaType   },
34};
35
36static bool from_c_colortype(sk_colortype_t cCT, SkColorType* skCT) {
37    for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypeMap); ++i) {
38        if (gColorTypeMap[i].fC == cCT) {
39            if (skCT) {
40                *skCT = gColorTypeMap[i].fSK;
41            }
42            return true;
43        }
44    }
45    return false;
46}
47
48static bool to_c_colortype(SkColorType skCT, sk_colortype_t* cCT) {
49    for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypeMap); ++i) {
50        if (gColorTypeMap[i].fSK == skCT) {
51            if (cCT) {
52                *cCT = gColorTypeMap[i].fC;
53            }
54            return true;
55        }
56    }
57    return false;
58}
59
60static bool from_c_alphatype(sk_alphatype_t cAT, SkAlphaType* skAT) {
61    for (size_t i = 0; i < SK_ARRAY_COUNT(gAlphaTypeMap); ++i) {
62        if (gAlphaTypeMap[i].fC == cAT) {
63            if (skAT) {
64                *skAT = gAlphaTypeMap[i].fSK;
65            }
66            return true;
67        }
68    }
69    return false;
70}
71
72static bool to_c_alphatype(SkAlphaType skAT, sk_alphatype_t* cAT) {
73    for (size_t i = 0; i < SK_ARRAY_COUNT(gAlphaTypeMap); ++i) {
74        if (gAlphaTypeMap[i].fSK == skAT) {
75            if (cAT) {
76                *cAT = gAlphaTypeMap[i].fC;
77            }
78            return true;
79        }
80    }
81    return false;
82}
83
84const SkImageInfo* ToImageInfo(const sk_imageinfo_t* cinfo) {
85    return reinterpret_cast<const SkImageInfo*>(cinfo);
86}
87
88/////////////////////////////////////////////////////////////////////////////////////////////
89
90sk_imageinfo_t* sk_imageinfo_new(int w, int h, sk_colortype_t cct, sk_alphatype_t cat,
91                                 sk_colorspace_t* ccs) {
92    SkColorType ct;
93    SkAlphaType at;
94    if (!from_c_colortype(cct, &ct) || !from_c_alphatype(cat, &at)) {
95        return nullptr;
96    }
97    SkColorSpace* cs = (SkColorSpace*)ccs;
98
99    SkImageInfo* info = new SkImageInfo(SkImageInfo::Make(w, h, ct, at, sk_ref_sp(cs)));
100    return reinterpret_cast<sk_imageinfo_t*>(info);
101}
102
103void sk_imageinfo_delete(sk_imageinfo_t* cinfo) {
104    delete ToImageInfo(cinfo);
105}
106
107int32_t sk_imageinfo_get_width(const sk_imageinfo_t* cinfo) {
108    return ToImageInfo(cinfo)->width();
109}
110
111int32_t sk_imageinfo_get_height(const sk_imageinfo_t* cinfo) {
112    return ToImageInfo(cinfo)->height();
113}
114
115sk_colortype_t sk_imageinfo_get_colortype(const sk_imageinfo_t* cinfo) {
116    sk_colortype_t ct;
117    return to_c_colortype(ToImageInfo(cinfo)->colorType(), &ct) ? ct : UNKNOWN_SK_COLORTYPE;
118}
119
120sk_alphatype_t sk_imageinfo_get_alphatype(const sk_imageinfo_t* cinfo) {
121    sk_alphatype_t at;
122    // odd that we return premul on failure...
123    return to_c_alphatype(ToImageInfo(cinfo)->alphaType(), &at) ? at : PREMUL_SK_ALPHATYPE;
124}
125
126sk_colorspace_t* sk_imageinfo_get_colorspace(const sk_imageinfo_t* cinfo) {
127    return reinterpret_cast<sk_colorspace_t*>(ToImageInfo(cinfo)->colorSpace());
128}
129
130/////////////////////////////////////////////////////////////////////////////////////////////
131
132sk_colorspace_t* sk_colorspace_new_srgb() {
133    return reinterpret_cast<sk_colorspace_t*>(SkColorSpace::MakeSRGB().release());
134}
135
136void sk_colorspace_ref(sk_colorspace_t* cs) {
137    SkSafeRef(reinterpret_cast<SkColorSpace*>(cs));
138}
139
140void sk_colorspace_unref(sk_colorspace_t* cs) {
141    SkSafeUnref(reinterpret_cast<SkColorSpace*>(cs));
142}
143
144