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add new platform_abstraction

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add support of loading ttf file
This commit is contained in:
Jinhao
2017-04-26 08:04:25 +08:00
parent 4aba8e8c7f
commit 2ff8a1c729
42 changed files with 876 additions and 398 deletions
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101
source/detail/platform_spec_windows.cpp
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@@ -12,15 +12,18 @@
* @brief basis classes and data structures required by nana
*/
#include <nana/detail/platform_spec_selector.hpp>
#include "platform_spec_selector.hpp"
#include "platform_abstraction.hpp"
#if defined(NANA_WINDOWS)
#include <stdexcept>
#include <map>
#include <windows.h>
#include <shellapi.h>
///////////////////////////////////////////////////////////////////////////////////////////////////////
/******************************************************************
@@ -310,15 +313,6 @@ namespace detail
}
}
//struct font_tag::deleter
void font_tag::deleter::operator()(const font_tag* tag) const
{
if(tag && tag->handle)
::DeleteObject(tag->handle);
delete tag;
}
//end struct font_tag::deleter
//class platform_spec
platform_spec::co_initializer::co_initializer()
: ole32_(::LoadLibrary(L"OLE32.DLL"))
@@ -354,104 +348,21 @@ namespace detail
struct platform_spec::implementation
{
font_ptr_t def_font_ptr;
std::map<native_window_type, window_icons> iconbase;
};
platform_spec::platform_spec()
: impl_{ new implementation}
{
//Create default font object.
NONCLIENTMETRICS metrics = {};
metrics.cbSize = sizeof metrics;
#if(WINVER >= 0x0600)
#if defined(NANA_MINGW)
OSVERSIONINFO osvi = {};
osvi.dwOSVersionInfoSize = sizeof(osvi);
::GetVersionEx(&osvi);
if (osvi.dwMajorVersion < 6)
metrics.cbSize -= sizeof(metrics.iPaddedBorderWidth);
#else
if(!IsWindowsVistaOrGreater())
metrics.cbSize -= sizeof(metrics.iPaddedBorderWidth);
#endif
#endif
::SystemParametersInfo(SPI_GETNONCLIENTMETRICS, sizeof metrics, &metrics, 0);
impl_->def_font_ptr = make_native_font(to_utf8(metrics.lfMessageFont.lfFaceName).c_str(), font_size_to_height(9), 400, false, false, false);
platform_abstraction::initialize();
}
platform_spec::~platform_spec()
{
platform_abstraction::shutdown();
delete impl_;
}
const platform_spec::font_ptr_t& platform_spec::default_native_font() const
{
return impl_->def_font_ptr;
}
void platform_spec::default_native_font(const font_ptr_t& fp)
{
impl_->def_font_ptr = fp;
}
unsigned platform_spec::font_size_to_height(unsigned size) const
{
HDC hdc = ::GetDC(0);
size = ::MulDiv(int(size), ::GetDeviceCaps(hdc, LOGPIXELSY), 72);
::ReleaseDC(0, hdc);
return size;
}
unsigned platform_spec::font_height_to_size(unsigned height) const
{
HDC hdc = ::GetDC(0);
unsigned pixels = ::GetDeviceCaps(hdc, LOGPIXELSY);
::ReleaseDC(0, hdc);
height = static_cast<unsigned>(static_cast<long long>(72) * height / pixels);
return height;
}
platform_spec::font_ptr_t platform_spec::make_native_font(const char* name, unsigned height, unsigned weight, bool italic, bool underline, bool strike_out)
{
::LOGFONT logfont;
memset(&logfont, 0, sizeof logfont);
if (name && *name)
std::wcscpy(logfont.lfFaceName, to_wstring(name).c_str());
else
std::wcscpy(logfont.lfFaceName, impl_->def_font_ptr->name.c_str());
logfont.lfCharSet = DEFAULT_CHARSET;
HDC hdc = ::GetDC(0);
logfont.lfHeight = -static_cast<int>(height);
::ReleaseDC(0, hdc);
logfont.lfWidth = 0;
logfont.lfWeight = weight;
logfont.lfQuality = PROOF_QUALITY;
logfont.lfPitchAndFamily = FIXED_PITCH;
logfont.lfItalic = italic;
logfont.lfUnderline = underline;
logfont.lfStrikeOut = strike_out;
HFONT result = ::CreateFontIndirect(&logfont);
if(result)
{
font_tag * impl = new font_tag;
impl->name = logfont.lfFaceName;
impl->height = height;
impl->weight = weight;
impl->italic = italic;
impl->underline = underline;
impl->strikeout = strike_out;
impl->handle = result;
return std::shared_ptr<font_tag>(impl, font_tag::deleter());
}
return nullptr;
}
platform_spec& platform_spec::instance()
{
static platform_spec object;