#define _WIN32_WINNT 0x500
#include <cairo-win32.h>
#include <stdio.h>
#pragma comment(lib, "gdi32.lib")
#pragma comment(lib, "user32.lib")

int main(int argc, char** argv) {
	LOGFONTW lf = {
		12,
		0,
		0,
		0,
		400,
		0,
		0,
		0,
		DEFAULT_CHARSET,
		OUT_OUTLINE_PRECIS,
		CLIP_DEFAULT_PRECIS,
		DEFAULT_QUALITY,
		DEFAULT_PITCH | FF_ROMAN,
		L"Times New Roman"
	};
	HFONT hfont = CreateFontIndirectW(&lf);
	cairo_font_face_t *font = cairo_win32_font_face_create_for_hfont(hfont);

	cairo_matrix_t size, device;
	cairo_matrix_init_scale(&size, 12, 12);
	cairo_matrix_init_identity(&device);
	cairo_font_options_t *options = cairo_font_options_create();
	cairo_scaled_font_t *scaled = cairo_scaled_font_create(font, &size, &device, options);

	// get glyph index for 'a'
	WORD index;
	HDC dc = CreateCompatibleDC(0);
	SelectObject(dc, hfont);
	GetGlyphIndicesA(dc, "a", 1, &index, 0);

	// get extents for real glyph
	cairo_text_extents_t extents;
	cairo_glyph_t glyphA = { index, 0, 0 };
	cairo_scaled_font_glyph_extents(scaled, &glyphA, 1, &extents);
	printf("x/y advance for char 'a' -> glyph '0x%x': %f/%f\n", index, extents.x_advance, extents.y_advance);

	// what's the font's status?
	const char* status = cairo_status_to_string(cairo_scaled_font_status(scaled));
	printf("status of cairo_scaled_font_t: %s\n", status);

	// get extents for garbage glyph
	cairo_glyph_t glyphF = { 0xffff, 0, 0 };
	cairo_scaled_font_glyph_extents(scaled, &glyphF, 1, &extents);
	printf("x/y advance for non-existing glyph '0xffff': %f/%f\n", extents.x_advance, extents.y_advance);

	// what's the font's status?
	status = cairo_status_to_string(cairo_scaled_font_status(scaled));
	printf("status of cairo_scaled_font_t: %s\n", status);

	// get extents for real glyph again
	cairo_scaled_font_glyph_extents(scaled, &glyphA, 1, &extents);
	printf("x/y advance for char 'a' -> glyph '0x%x': %f/%f\n", index, extents.x_advance, extents.y_advance);
}