mewin/nana
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

open png/jpg image with memory buffer

Browse Source
This commit is contained in:
Jinhao
2016-01-27 01:14:28 +08:00
parent 5a960ed88c
commit 3c8ee33ae8
8 changed files with 278 additions and 152 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
source/paint/image.cpp
View File

@@ -163,7 +163,7 @@ namespace paint
{}
//class image
image::image()
image::image() noexcept
{}
image::image(const image& rhs)
@@ -245,7 +245,7 @@ namespace paint
if (ext_png == ext)
{
#if defined(NANA_ENABLE_PNG)
ptr = std::make_shared<detail::image_png>;
ptr = std::make_shared<detail::image_png>();
#else
return ptr;
#endif
@@ -299,14 +299,53 @@ namespace paint
return (image_ptr_ ? image_ptr_->open(path) : false);
}
bool image::open_icon(const void* data, std::size_t bytes)
bool image::open(const void* data, std::size_t bytes)
{
image::image_impl_interface * helper = new detail::image_ico(true);
image_ptr_ = std::shared_ptr<image_impl_interface>(helper);
return helper->open(data, bytes);
close();
if (bytes > 2)
{
std::shared_ptr<image::image_impl_interface> ptr;
auto meta = *reinterpret_cast<const unsigned short*>(data);
if (*reinterpret_cast<const short*>("BM") == meta)
ptr = std::make_shared<detail::image_bmp>();
else if (*reinterpret_cast<const short*>("MZ") == meta)
ptr = std::make_shared<detail::image_ico>(false);
else
{
if (bytes > 8 && (0x474e5089 == *reinterpret_cast<const unsigned*>(data)))
{
#if defined(NANA_ENABLE_PNG)
ptr = std::make_shared<detail::image_png>();
#endif
}
else
{
#if defined(NANA_ENABLE_JPEG)
//JFIF
if (bytes > 11 && (0xe0ffd8ff == *reinterpret_cast<const unsigned*>(data)) && 0x4649464A == *reinterpret_cast<const unsigned*>(reinterpret_cast<const char*>(data)+6))
ptr = std::make_shared<detail::image_jpeg>();
else if (bytes > 9 && (0x66697845 == *reinterpret_cast<const unsigned*>(reinterpret_cast<const char*>(data)+5))) //Exif
ptr = std::make_shared<detail::image_jpeg>();
#endif
}
}
if (ptr)
{
image_ptr_.swap(ptr);
return image_ptr_->open(data, bytes);
}
}
return false;
}
bool image::empty() const
bool image::empty() const noexcept
{
return ((nullptr == image_ptr_) || image_ptr_->empty());
}