Не могу представить китайский рисунок с Freetype ⇐ C++

[Anonymous]

Я пытаюсь вывести эту строку L "Привет, 你好, 日本" . Вот что он показывает:

Я пытаюсь использовать freetype
, чтобы нарисовать на hdc in winapi/atl. class = "lang-cpp prettyprint-override">

Код: Выделить всё

#include 
#include 
#include 
#include 
#include FT_FREETYPE_H

using std::cout;
using std::endl;

template class scope_guard
{
T t;
public:
scope_guard(T _t) :t(_t) {}
~scope_guard() { t(); }
};

void drawGlythBitmap(FT_Face ftface, HDC hdc, int& pen_x, int& pen_y, wchar_t c)
{
FT_Load_Char(ftface, c, FT_LOAD_RENDER);

FT_GlyphSlot& glyph = ftface->glyph;
FT_Bitmap& btm = ftface->glyph->bitmap;
FT_Bitmap& pbtm = glyph->bitmap;
int heigthAdvance = -glyph->bitmap_top + ftface->size->metrics.y_ppem; //stays inside the rectangle, but diacritics go under the bottom
//int heigthAdvance = -glyph->bitmap_top; //stays on top of rectangle and intersects it
int ytop = pen_y + heigthAdvance;

for (int i = 0, xi = pen_x; i < pbtm.width; i++, xi++)
{
for (int j = 0; j < pbtm.rows; j++)
{
char pixel_val = pbtm.buffer[j * pbtm.width + i] ^ -1;
SetPixel(hdc, xi, ytop + j, RGB(pixel_val, pixel_val, pixel_val)); //almost ok
}
}

pen_x += glyph->advance.x >> 6;
}

void drawStringFT_IntoDC(FT_Face ftface, HDC hdc, const wchar_t* str, int& pen_x, int& pen_y, SIZE* sz = 0)
{
for (int i = 0; str[i]; i++)
drawGlythBitmap(ftface, hdc, pen_x, pen_y, str[i]);
}

void drawStringFT_IntoDC(FT_Face ftface, HDC hdc, const wchar_t* str, unsigned int fontSizeFT, int& pen_x, int& pen_y, SIZE* sz = 0)
{
FT_Set_Pixel_Sizes(ftface, 0, fontSizeFT);
drawStringFT_IntoDC(ftface, hdc, str, pen_x, pen_y, sz);
}

class CDemoWindow : public CWindowImpl
{
FT_Library ftlib;
FT_Face ftface;

public:

CDemoWindow()
{
FT_Init_FreeType(&ftlib);
FT_New_Face(ftlib, "C:/Windows/Fonts/arial.ttf", 0, &ftface);
}

virtual ~CDemoWindow() {
FT_Done_Face(ftface);
FT_Done_FreeType(ftlib);
}

/////////////////////////// Message Handlers /////////////////////////////////
LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
return 1;
}

LRESULT OnPaint(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(&ps);
scope_guard sg_ps([this, &ps]() { EndPaint(&ps); });

int xstart = 50, pen_x = 50, pen_y = 200, ystart = 200, step = 30;

std::wstring str = L"Hello, 你好, 日本";

unsigned int fontSizeFT = 48;
drawStringFT_IntoDC(ftface, hdc, str.c_str(), fontSizeFT, pen_x, pen_y);

bHandled = TRUE;
return 0;
}

LRESULT OnLButtonUp(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
Invalidate(); //repaint request with a click
return 0;
}

LRESULT OnKeyDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
switch (wParam)
{
case VK_ESCAPE:
PostQuitMessage(0);
bHandled = TRUE;
break;
}
return 0;
}

LRESULT OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
PostQuitMessage(0);
return 1;
}

BEGIN_MSG_MAP(CDemoWindow)
MESSAGE_HANDLER(WM_CREATE, OnCreate)
MESSAGE_HANDLER(WM_PAINT, OnPaint)
MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
MESSAGE_HANDLER(WM_LBUTTONUP, OnLButtonUp)
MESSAGE_HANDLER(WM_KEYDOWN, OnKeyDown)
END_MSG_MAP()
};

int main()
{
CDemoWindow cwnd;

HWND hWnd = cwnd.Create(NULL, CWindow::rcDefault, L"Hello", WS_OVERLAPPEDWINDOW);

cwnd.ShowWindow(SW_SHOWNORMAL);
cwnd.UpdateWindow();

MSG msg;
while (GetMessage(&msg, 0, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}

Замечание 1: Чтобы предвидеть возможные вопросы, все чары установлены и на месте. Если есть какие-либо подозрения в файле CPP, содержащем китайские символы, это также не проблема, то это в UTF-8, кодируясь с подписью. src = "https://i.sstatic.net/qvowxrnz.png"/>
#include
#include
#include

using std::cout;
using std::endl;

template class scope_guard
{
T t;
public:
scope_guard(T _t) :t(_t) {}
~scope_guard() { t(); }
};

SIZE paintWithFont(HDC hDC, int x, int y, const wchar_t* str, wchar_t* font, int height = 0, int width = 0, DWORD iCharset = DEFAULT_CHARSET)
{
HFONT hFont = ::CreateFontW(height, width, 0, 0, FW_DONTCARE,
0, 0, 0, iCharset,
0, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH, font);
HGDIOBJ hOldFont = ::SelectObject(hDC, hFont);
scope_guard fnt_guard([&hFont, &hOldFont]() {::DeleteObject(hFont); ::DeleteObject(hOldFont); });
SIZE sz;
::GetTextExtentPoint32W(hDC, str, wcslen(str), &sz);
::TextOutW(hDC, x, y, str, wcslen(str));
::SelectObject(hDC, hOldFont);
return sz;
}

class CDemoWindow : public CWindowImpl
{

public:

CDemoWindow()
{
}

virtual ~CDemoWindow() {
}

/////////////////////////// Message Handlers /////////////////////////////////
LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
return 1;
}

LRESULT OnPaint(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(&ps);
scope_guard sg_ps([this, &ps]() { EndPaint(&ps); });

int xstart = 50, pen_x = 50, pen_y = 200, ystart = 200, step = 30;

std::wstring str = L"Hello, 你好, 日本";

SIZE sz;
unsigned int fontSize = 48;
paintWithFont(hdc, 50, ystart, str.c_str(), L"Arial", fontSize); ystart += step;

bHandled = TRUE;
return 0;
}

LRESULT OnLButtonUp(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
Invalidate(); //repaint request with a click
return 0;
}

LRESULT OnKeyDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
switch (wParam)
{
case VK_ESCAPE:
PostQuitMessage(0);
bHandled = TRUE;
break;
}
return 0;
}

LRESULT OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
PostQuitMessage(0);
return 1;
}

BEGIN_MSG_MAP(CDemoWindow)
MESSAGE_HANDLER(WM_CREATE, OnCreate)
MESSAGE_HANDLER(WM_PAINT, OnPaint)
MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
MESSAGE_HANDLER(WM_LBUTTONUP, OnLButtonUp)
MESSAGE_HANDLER(WM_KEYDOWN, OnKeyDown)
END_MSG_MAP()
};

int main()
{
CDemoWindow cwnd;

HWND hWnd = cwnd.Create(NULL, CWindow::rcDefault, L"Hello", WS_OVERLAPPEDWINDOW);
cwnd.ShowWindow(SW_SHOWNORMAL);
cwnd.UpdateWindow();

MSG msg;
while (GetMessage(&msg, 0, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}
< /code>
замечание 3 < /strong> коды Unicode для Chars:

你 4f60

好 597d

⽇ 2f47

本 672c < /p>

Подробнее здесь: https://stackoverflow.com/questions/797 ... h-freetype