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graphics::make throws std::bad_alloc when it fails

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This commit is contained in:
Jinhao 2017-09-27 08:13:55 +08:00
parent 13761be5e9
commit 8d9351e051
1 changed files with 59 additions and 27 deletions
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86
source/paint/graphics.cpp
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@ -293,7 +293,7 @@ namespace paint
void graphics::make(const ::nana::size& sz)
{
if(impl_->handle == nullptr || impl_->size != sz)
if (impl_->handle == nullptr || impl_->size != sz)
{
if (sz.empty())
{
@ -302,9 +302,10 @@ namespace paint
}
//The object will be delete while dwptr_ is performing a release.
drawable_type dw = new nana::detail::drawable_impl_type;
std::shared_ptr<nana::detail::drawable_impl_type> dw{ new nana::detail::drawable_impl_type, detail::drawable_deleter{} };
//Reuse the old font
if(impl_->platform_drawable)
if (impl_->platform_drawable)
{
drawable_type reuse = impl_->platform_drawable.get();
dw->font = reuse->font;
@ -314,8 +315,13 @@ namespace paint
dw->font = impl_->font_shadow.impl_->real_font;
#if defined(NANA_WINDOWS)
HDC hdc = ::GetDC(0);
HDC hdc = ::GetDC(nullptr);
HDC cdc = ::CreateCompatibleDC(hdc);
if (nullptr == cdc)
{
::ReleaseDC(nullptr, hdc);
throw std::bad_alloc{};
}
BITMAPINFO bmi;
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
@ -328,34 +334,60 @@ namespace paint
HBITMAP bmp = ::CreateDIBSection(cdc, &bmi, DIB_RGB_COLORS, reinterpret_cast<void**>(&(dw->pixbuf_ptr)), 0, 0);
if(bmp)
{
::DeleteObject((HBITMAP)::SelectObject(cdc, bmp));
::DeleteObject(::SelectObject(cdc, dw->font->native_handle()));
dw->context = cdc;
dw->pixmap = bmp;
::SetBkMode(cdc, TRANSPARENT);
}
else
if (nullptr == bmp)
{
::DeleteDC(cdc);
delete dw;
dw = nullptr;
release();
::ReleaseDC(nullptr, hdc);
throw std::bad_alloc{};
}
::DeleteObject((HBITMAP)::SelectObject(cdc, bmp));
::DeleteObject(::SelectObject(cdc, dw->font->native_handle()));
dw->context = cdc;
dw->pixmap = bmp;
::SetBkMode(cdc, TRANSPARENT);
::ReleaseDC(0, hdc);
#elif defined(NANA_X11)
auto & spec = nana::detail::platform_spec::instance();
Display* disp = spec.open_display();
int screen = DefaultScreen(disp);
Window root = ::XRootWindow(disp, screen);
dw->pixmap = ::XCreatePixmap(disp, root, sz.width, sz.height, DefaultDepth(disp, screen));
dw->context = ::XCreateGC(disp, dw->pixmap, 0, 0);
#if defined(NANA_USE_XFT)
dw->xftdraw = ::XftDrawCreate(disp, dw->pixmap, spec.screen_visual(), spec.colormap());
#endif
{
nana::detail::platform_scope_guard psg;
spec.set_error_handler();
Display* disp = spec.open_display();
int screen = DefaultScreen(disp);
Window root = ::XRootWindow(disp, screen);
auto pixmap = ::XCreatePixmap(disp, root, sz.width, sz.height, DefaultDepth(disp, screen));
if(spec.error_code)
{
spec.rev_error_handler();
throw std::bad_alloc();
}
auto context = ::XCreateGC(disp, pixmap, 0, 0);
if (spec.error_code)
{
::XFreePixmap(disp, pixmap);
spec.rev_error_handler();
throw std::bad_alloc();
}
# if defined(NANA_USE_XFT)
auto xftdraw = ::XftDrawCreate(disp, pixmap, spec.screen_visual(), spec.colormap());
if (spec.error_code)
{
::XFreeGC(disp, context);
::XFreePixmap(disp, pixmap);
spec.rev_error_handler();
throw std::bad_alloc();
}
dw->xftdraw = xftdraw;
# endif
dw->pixmap = pixmap;
dw->context = context;
}
#endif
if(dw)
{
@ -366,8 +398,8 @@ namespace paint
#else
dw->update_text_color();
#endif
impl_->platform_drawable.reset(dw, detail::drawable_deleter{});
impl_->handle = dw;
impl_->platform_drawable = dw;
impl_->handle = dw.get();
impl_->size = sz;
impl_->handle->string.tab_pixels = detail::raw_text_extent_size(impl_->handle, L"\t", 1).width;