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eg/nuklear/nuklear_gdi.h  view on Meta::CPAN

}

GdiFont*
nk_gdifont_create(const char *name, int size)
{
    TEXTMETRICW metric;
    GdiFont *font = (GdiFont*)calloc(1, sizeof(GdiFont));
    if (!font)
        return NULL;
    font->dc = CreateCompatibleDC(0);
    font->handle = CreateFontA(size, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, CLEARTYPE_QUALITY, DEFAULT_PITCH | FF_DONTCARE, name);
    SelectObject(font->dc, font->handle);
    GetTextMetricsW(font->dc, &metric);
    font->height = metric.tmHeight;
    return font;
}

static float
nk_gdifont_get_text_width(nk_handle handle, float height, const char *text, int len)
{
    GdiFont *font = (GdiFont*)handle.ptr;
    SIZE size;
    int wsize;
    WCHAR* wstr;
    if (!font || !text)
        return 0;

    wsize = MultiByteToWideChar(CP_UTF8, 0, text, len, NULL, 0);
    wstr = (WCHAR*)_alloca(wsize * sizeof(wchar_t));
    MultiByteToWideChar(CP_UTF8, 0, text, len, wstr, wsize);
    if (GetTextExtentPoint32W(font->dc, wstr, wsize, &size))
        return (float)size.cx;
    return -1.0f;
}

void
nk_gdifont_del(GdiFont *font)
{
    if(!font) return;
    DeleteObject(font->handle);
    DeleteDC(font->dc);
    free(font);
}

static void
nk_gdi_clipboard_paste(nk_handle usr, struct nk_text_edit *edit)
{
    (void)usr;
    if (IsClipboardFormatAvailable(CF_UNICODETEXT) && OpenClipboard(NULL))
    {
        HGLOBAL mem = GetClipboardData(CF_UNICODETEXT);
        if (mem)
        {
            SIZE_T size = GlobalSize(mem) - 1;
            if (size)
            {
                LPCWSTR wstr = (LPCWSTR)GlobalLock(mem);
                if (wstr)
                {
                    int utf8size = WideCharToMultiByte(CP_UTF8, 0, wstr, (int)(size / sizeof(wchar_t)), NULL, 0, NULL, NULL);
                    if (utf8size)
                    {
                        char* utf8 = (char*)malloc(utf8size);
                        if (utf8)
                        {
                            WideCharToMultiByte(CP_UTF8, 0, wstr, (int)(size / sizeof(wchar_t)), utf8, utf8size, NULL, NULL);
                            nk_textedit_paste(edit, utf8, utf8size);
                            free(utf8);
                        }
                    }
                    GlobalUnlock(mem);
                }
            }
        }
        CloseClipboard();
    }
}

static void
nk_gdi_clipboard_copy(nk_handle usr, const char *text, int len)
{
    if (OpenClipboard(NULL))
    {
        int wsize = MultiByteToWideChar(CP_UTF8, 0, text, len, NULL, 0);
        if (wsize)
        {
            HGLOBAL mem = (HGLOBAL)GlobalAlloc(GMEM_MOVEABLE, (wsize + 1) * sizeof(wchar_t));
            if (mem)
            {
                wchar_t* wstr = (wchar_t*)GlobalLock(mem);
                if (wstr)
                {
                    MultiByteToWideChar(CP_UTF8, 0, text, len, wstr, wsize);
                    wstr[wsize] = 0;
                    GlobalUnlock(mem);

                    SetClipboardData(CF_UNICODETEXT, mem);
                }
            }
        }
        CloseClipboard();
    }
}

NK_API struct nk_context*
nk_gdi_init(GdiFont *gdifont, HDC window_dc, unsigned int width, unsigned int height)
{
    struct nk_user_font *font = &gdifont->nk;
    font->userdata = nk_handle_ptr(gdifont);
    font->height = (float)gdifont->height;
    font->width = nk_gdifont_get_text_width;

    gdi.bitmap = CreateCompatibleBitmap(window_dc, width, height);
    gdi.window_dc = window_dc;
    gdi.memory_dc = CreateCompatibleDC(window_dc);
    gdi.width = width;
    gdi.height = height;
    SelectObject(gdi.memory_dc, gdi.bitmap);

    nk_init_default(&gdi.ctx, font);
    gdi.ctx.clip.copy = nk_gdi_clipboard_copy;
    gdi.ctx.clip.paste = nk_gdi_clipboard_paste;
    return &gdi.ctx;
}

NK_API void
nk_gdi_set_font(GdiFont *gdifont)
{