## Microsoft Windows Backend

Microsoft Windows Backend —

## Synopsis

    cairo_surface_t* cairo_win32_surface_create (HDC hdc);
    cairo_font_face_t* cairo_win32_font_face_create_for_logfontw
                                                (LOGFONTW *logfont);
    cairo_status_t cairo_win32_scaled_font_select_font
                                                (cairo_scaled_font_t *scaled_font,
                                                 HDC hdc);
    void        cairo_win32_scaled_font_done_font
                                                (cairo_scaled_font_t *scaled_font);
    double      cairo_win32_scaled_font_get_metrics_factor
                                                (cairo_scaled_font_t *scaled_font);

## Description

## Details

### cairo_win32_surface_create ()

    cairo_surface_t* cairo_win32_surface_create (HDC hdc);

`hdc` : |
Returns : |

### cairo_win32_font_face_create_for_logfontw ()

    cairo_font_face_t* cairo_win32_font_face_create_for_logfontw
                                                (LOGFONTW *logfont);

Creates a new font for the Win32 font backend based on a LOGFONT. This font can then be used with `cairo_set_font_face()` or `cairo_font_create()`. The cairo_scaled_font_t returned from `cairo_font_create()` is also for the Win32 backend and can be used with functions such as `cairo_win32_scaled_font_select_font()`.

`logfont` : | A LOGFONTW structure specifying the font to use. The lfHeight, lfWidth, lfOrientation and lfEscapement fields of this structure are ignored.
Returns : | a newly created cairo_font_face_t. Free with `cairo_font_face_destroy()` when you are done using it.

### cairo_win32_scaled_font_select_font ()

    cairo_status_t cairo_win32_scaled_font_select_font
                                                (cairo_scaled_font_t *scaled_font,
                                                 HDC hdc);

Selects the font into the given device context and changes the map mode and world transformation of the device context to match that of the font. This function is intended for use when using layout APIs such as Uniscribe to do text layout with the cairo font. After finishing using the device context, you must call `cairo_win32_scaled_font_done_font()` to release any resources allocated by this function.

See `cairo_win32_scaled_font_get_metrics_factor()` for converting logical coordinates from the device context to font space.

Normally, calls to `SaveDC()` and `RestoreDC()` would be made around the use of this function to preserve the original graphics state.

`scaled_font` : | A cairo_scaled_font_t from the Win32 font backend. Such an object can be created with `cairo_win32_scaled_font_create_for_logfontw()`.
`hdc` : | a device context
Returns : | `CAIRO_STATUS_SUCCESS` if the operation succeeded. otherwise an error such as `CAIRO_STATUS_NO_MEMORY` and the device context is unchanged.

### cairo_win32_scaled_font_done_font ()

    void        cairo_win32_scaled_font_done_font
                                                (cairo_scaled_font_t *scaled_font);

Releases any resources allocated by `cairo_win32_scaled_font_select_font()`

`scaled_font` : | A cairo_scaled_font_t from the Win32 font backend.

### cairo_win32_scaled_font_get_metrics_factor ()

    double      cairo_win32_scaled_font_get_metrics_factor
                                                (cairo_scaled_font_t *scaled_font);

Gets a scale factor between logical coordinates in the coordinate space used by `cairo_win32_scaled_font_select_font()` (that is, the coordinate system used by the Windows functions to return metrics) and font space coordinates.

`scaled_font` : | a cairo_scaled_font_t from the Win32 font backend
Returns : | factor to multiply logical units by to get font space coordinates.