1 /*
2 * Copyright 2012 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/SkTypes.h"
9
10 #if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
11
12 #include "include/core/SkStream.h"
13 #include "include/private/SkMalloc.h"
14 #include "include/utils/mac/SkCGUtils.h"
15
16 // These are used by CGDataProviderCreateWithData
17
unref_proc(void * info,const void * addr,size_t size)18 static void unref_proc(void* info, const void* addr, size_t size) {
19 SkASSERT(info);
20 ((SkRefCnt*)info)->unref();
21 }
22
delete_stream_proc(void * info,const void * addr,size_t size)23 static void delete_stream_proc(void* info, const void* addr, size_t size) {
24 SkASSERT(info);
25 SkStream* stream = (SkStream*)info;
26 SkASSERT(stream->getMemoryBase() == addr);
27 SkASSERT(stream->getLength() == size);
28 delete stream;
29 }
30
31 // These are used by CGDataProviderSequentialCallbacks
32
get_bytes_proc(void * info,void * buffer,size_t bytes)33 static size_t get_bytes_proc(void* info, void* buffer, size_t bytes) {
34 SkASSERT(info);
35 return ((SkStream*)info)->read(buffer, bytes);
36 }
37
skip_forward_proc(void * info,off_t bytes)38 static off_t skip_forward_proc(void* info, off_t bytes) {
39 return ((SkStream*)info)->skip((size_t) bytes);
40 }
41
rewind_proc(void * info)42 static void rewind_proc(void* info) {
43 SkASSERT(info);
44 ((SkStream*)info)->rewind();
45 }
46
47 // Used when info is an SkStream.
release_info_proc(void * info)48 static void release_info_proc(void* info) {
49 SkASSERT(info);
50 delete (SkStream*)info;
51 }
52
SkCreateDataProviderFromStream(std::unique_ptr<SkStreamRewindable> stream)53 CGDataProviderRef SkCreateDataProviderFromStream(std::unique_ptr<SkStreamRewindable> stream) {
54 // TODO: Replace with SkStream::getData() when that is added. Then we only
55 // have one version of CGDataProviderCreateWithData (i.e. same release proc)
56 const void* addr = stream->getMemoryBase();
57 if (addr) {
58 // special-case when the stream is just a block of ram
59 size_t size = stream->getLength();
60 return CGDataProviderCreateWithData(stream.release(), addr, size, delete_stream_proc);
61 }
62
63 CGDataProviderSequentialCallbacks rec;
64 sk_bzero(&rec, sizeof(rec));
65 rec.version = 0;
66 rec.getBytes = get_bytes_proc;
67 rec.skipForward = skip_forward_proc;
68 rec.rewind = rewind_proc;
69 rec.releaseInfo = release_info_proc;
70 return CGDataProviderCreateSequential(stream.release(), &rec);
71 }
72
73 ///////////////////////////////////////////////////////////////////////////////
74
75 #include "include/core/SkData.h"
76
SkCreateDataProviderFromData(sk_sp<SkData> data)77 CGDataProviderRef SkCreateDataProviderFromData(sk_sp<SkData> data) {
78 const void* addr = data->data();
79 size_t size = data->size();
80 return CGDataProviderCreateWithData(data.release(), addr, size, unref_proc);
81 }
82
83 #endif//defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
84