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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkCGUtils.h"
#include "SkStream.h"
// This is used by CGDataProviderCreateWithData
static void unref_proc(void* info, const void* addr, size_t size) {
SkASSERT(info);
((SkRefCnt*)info)->unref();
}
// These are used by CGDataProviderSequentialCallbacks
static size_t get_bytes_proc(void* info, void* buffer, size_t bytes) {
SkASSERT(info);
return ((SkStream*)info)->read(buffer, bytes);
}
static off_t skip_forward_proc(void* info, off_t bytes) {
return ((SkStream*)info)->skip((size_t) bytes);
}
static void rewind_proc(void* info) {
SkASSERT(info);
((SkStream*)info)->rewind();
}
static void release_info_proc(void* info) {
SkASSERT(info);
((SkStream*)info)->unref();
}
CGDataProviderRef SkCreateDataProviderFromStream(SkStream* stream) {
stream->ref(); // unref will be called when the provider is deleted
const void* addr = stream->getMemoryBase();
if (addr) {
// special-case when the stream is just a block of ram
return CGDataProviderCreateWithData(stream, addr, stream->getLength(),
unref_proc);
}
CGDataProviderSequentialCallbacks rec;
sk_bzero(&rec, sizeof(rec));
rec.version = 0;
rec.getBytes = get_bytes_proc;
rec.skipForward = skip_forward_proc;
rec.rewind = rewind_proc;
rec.releaseInfo = release_info_proc;
return CGDataProviderCreateSequential(stream, &rec);
}
///////////////////////////////////////////////////////////////////////////////
#include "SkData.h"
CGDataProviderRef SkCreateDataProviderFromData(SkData* data) {
data->ref();
return CGDataProviderCreateWithData(data, data->data(), data->size(),
unref_proc);
}
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