/*
* Returns the ID of the font matching the given pattern and stores the height
* of the font (in pixels) in *font_height. die()s if no font matches.
*
*/
int get_font_id(xcb_connection_t *conn, char *pattern, int *font_height) {
xcb_void_cookie_t font_cookie;
xcb_list_fonts_with_info_cookie_t info_cookie;
/* Send all our requests first */
int result;
result = xcb_generate_id(conn);
font_cookie = xcb_open_font_checked(conn, result, strlen(pattern), pattern);
info_cookie = xcb_list_fonts_with_info(conn, 1, strlen(pattern), pattern);
xcb_generic_error_t *error = xcb_request_check(conn, font_cookie);
if (error != NULL) {
fprintf(stderr, "ERROR: Could not open font: %d\n", error->error_code);
exit(1);
}
/* Get information (height/name) for this font */
xcb_list_fonts_with_info_reply_t *reply = xcb_list_fonts_with_info_reply(conn, info_cookie, NULL);
if (reply == NULL)
errx(1, "Could not load font \"%s\"\n", pattern);
*font_height = reply->font_ascent + reply->font_descent;
return result;
}
static
int init_font() {
xcb_void_cookie_t cookie;
xcb_generic_error_t *err;
xcb_list_fonts_with_info_cookie_t info_cookie;
xcb_list_fonts_with_info_reply_t *info;
/* open font */
nil_.font.id = xcb_generate_id(nil_.con);
cookie = xcb_open_font_checked(nil_.con, nil_.font.id,
strlen(cfg_.font_name), cfg_.font_name);
err = xcb_request_check(nil_.con, cookie);
if (err) {
NIL_ERR("open font: %d", err->error_code);
return -1;
}
info_cookie = xcb_list_fonts_with_info(nil_.con, 1,
strlen(cfg_.font_name), cfg_.font_name);
info = xcb_list_fonts_with_info_reply(nil_.con, info_cookie, 0);
if (!info) {
NIL_ERR("load font: %s", cfg_.font_name);
return -1;
}
NIL_LOG("font ascent=%d, descent=%d", info->font_ascent, info->font_descent);
nil_.font.ascent = info->font_ascent;
nil_.font.descent = info->font_descent;
free(info);
return 0;
}
static xcb_gc_t getFontGC(xcb_connection_t *connection,
xcb_screen_t *screen,
xcb_window_t window,
const char *fontName) {
xcb_font_t font = xcb_generate_id(connection);
xcb_void_cookie_t fontCookie = xcb_open_font_checked(connection,
font,
strlen(fontName),
fontName);
testCookie(fontCookie, connection, "can't open font");
xcb_gcontext_t gc = xcb_generate_id(connection);
uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
uint32_t value_list[3];
value_list[0] = screen->black_pixel;
value_list[1] = screen->white_pixel;
value_list[2] = font;
xcb_void_cookie_t gcCookie = xcb_create_gc_checked(connection,
gc,
window,
mask,
value_list);
testCookie(gcCookie, connection, "can't create gc");
fontCookie = xcb_close_font_checked(connection, font);
testCookie(fontCookie, connection, "can't close font");
return gc;
}
static void
cursor_set (xcb_connection_t *c,
xcb_screen_t *screen,
xcb_window_t window,
int cursor_id)
{
uint32_t values_list[3];
xcb_void_cookie_t cookie_font;
xcb_void_cookie_t cookie_gc;
xcb_generic_error_t *error;
xcb_font_t font;
xcb_cursor_t cursor;
xcb_gcontext_t gc;
uint32_t mask;
uint32_t value_list;
font = xcb_generate_id (c);
cookie_font = xcb_open_font_checked (c, font,
strlen ("cursor"),
"cursor");
error = xcb_request_check (c, cookie_font);
if (error) {
fprintf (stderr, "ERROR: can't open font : %d\n", error->error_code);
xcb_disconnect (c);
exit (-1);
}
cursor = xcb_generate_id (c);
xcb_create_glyph_cursor (c, cursor, font, font,
cursor_id, cursor_id + 1,
0, 0, 0,
0, 0, 0);
gc = xcb_generate_id (c);
mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
values_list[0] = screen->black_pixel;
values_list[1] = screen->white_pixel;
values_list[2] = font;
cookie_gc = xcb_create_gc_checked (c, gc, window, mask, values_list);
error = xcb_request_check (c, cookie_gc);
if (error) {
fprintf (stderr, "ERROR: can't create gc : %d\n", error->error_code);
xcb_disconnect (c);
exit (-1);
}
mask = XCB_CW_CURSOR;
value_list = cursor;
xcb_change_window_attributes (c, window, mask, &value_list);
xcb_free_cursor (c, cursor);
cookie_font = xcb_close_font_checked (c, font);
error = xcb_request_check (c, cookie_font);
if (error) {
fprintf (stderr, "ERROR: can't close font : %d\n", error->error_code);
xcb_disconnect (c);
exit (-1);
}
}
xcb_gc_t get_font_gc(xcb_connection_t *dpy, xcb_window_t win, const char *font_name)
{
xcb_void_cookie_t ck;
xcb_font_t font = xcb_generate_id(dpy);
ck = xcb_open_font_checked(dpy, font, strlen(font_name), font_name);
check_request(dpy, ck, "Can't open font");
xcb_gcontext_t gc = xcb_generate_id(dpy);
uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
uint32_t values[] = {0xffcccccc, 0xff111111, font};
xcb_create_gc(dpy, gc, win, mask, values);
xcb_close_font(dpy, font);
return gc;
}
static xcb_gc_t
gc_font_get (xcb_connection_t *c,
xcb_screen_t *screen,
xcb_window_t window,
const char *font_name)
{
uint32_t value_list[3];
xcb_void_cookie_t cookie_font;
xcb_void_cookie_t cookie_gc;
xcb_generic_error_t *error;
xcb_font_t font;
xcb_gcontext_t gc;
uint32_t mask;
font = xcb_generate_id (c);
cookie_font = xcb_open_font_checked (c, font,
strlen (font_name),
font_name);
error = xcb_request_check (c, cookie_font);
if (error) {
fprintf (stderr, "ERROR: can't open font : %d\n", error->error_code);
xcb_disconnect (c);
return -1;
}
gc = xcb_generate_id (c);
mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
value_list[0] = screen->black_pixel;
value_list[1] = screen->white_pixel;
value_list[2] = font;
cookie_gc = xcb_create_gc_checked (c, gc, window, mask, value_list);
error = xcb_request_check (c, cookie_gc);
if (error) {
fprintf (stderr, "ERROR: can't create gc : %d\n", error->error_code);
xcb_disconnect (c);
exit (-1);
}
cookie_font = xcb_close_font_checked (c, font);
error = xcb_request_check (c, cookie_font);
if (error) {
fprintf (stderr, "ERROR: can't close font : %d\n", error->error_code);
xcb_disconnect (c);
exit (-1);
}
return gc;
}
static void setCursor(xcb_connection_t *connection,
xcb_screen_t *screen,
xcb_window_t window,
int cursorId) {
xcb_font_t font = xcb_generate_id(connection);
xcb_void_cookie_t fontCookie = xcb_open_font_checked(connection,
font,
strlen("cursor"),
"cursor");
testCookie(fontCookie, connection, "can't open font");
xcb_cursor_t cursor = xcb_generate_id(connection);
xcb_create_glyph_cursor(connection,
cursor,
font,
font,
cursorId,
cursorId + 1,
0,0,0,0,0,0);
xcb_gcontext_t gc = xcb_generate_id(connection);
uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
uint32_t values_list[3];
values_list[0] = screen->black_pixel;
values_list[1] = screen->white_pixel;
values_list[2] = font;
xcb_void_cookie_t gcCookie = xcb_create_gc_checked(connection, gc, window, mask, values_list);
testCookie(gcCookie, connection, "can't create gc");
mask = XCB_CW_CURSOR;
uint32_t value_list = cursor;
xcb_change_window_attributes(connection, window, mask, &value_list);
xcb_free_cursor(connection, cursor);
fontCookie = xcb_close_font_checked(connection, font);
testCookie(fontCookie, connection, "can't close font");
}
/** \param connection connection to a X sever
\param screen screen, where the window will be created
\param parent parent window (0 for screen->root)
\param windowed means no fullscreen
*/
scr_window(xcb_connection_t *connection, xcb_screen_t *screen,
xcb_window_t parent, bool windowed)
: con(connection), scr(screen), client_win(0)
{
uint32_t mask;
uint32_t values[3];
xcb_void_cookie_t cookie;
xcb_generic_error_t *error = NULL;
if(!parent) parent = scr->root;
// use parent window size when not in windowed mode
if(!windowed) {
xcb_get_geometry_cookie_t geo_cookie = xcb_get_geometry(con, parent);
xcb_get_geometry_reply_t *reply =
xcb_get_geometry_reply(con, geo_cookie, &error);
if(error) {
std::cerr << "Could not get parent window geometry." << std::endl;
exit(1);
}
width = reply->width;
height = reply->height;
free(reply);
} else {
// use some defaults in windowed mode
width = 640;
height = 480;
}
if(windowed) {
// create a black maybe override-redirected window
// and register for expose and resize events.
mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
values[0] = scr->black_pixel;
values[1] = !windowed; // only if in fullscreen mode, otherwise normal window
values[2] = XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_STRUCTURE_NOTIFY;
win = xcb_generate_id(con);
cookie = xcb_create_window_checked(
con, XCB_COPY_FROM_PARENT, win,
parent, 0, 0, width, height, 0,
XCB_WINDOW_CLASS_INPUT_OUTPUT,
scr->root_visual, mask, values
);
error = xcb_request_check(con, cookie);
if(error) {
std::cerr << "Could not create window." << std::endl;
exit(1);
}
// map the window on the screen
xcb_map_window(con, win);
xcb_flush(con);
} else {
// directly use the parent window
win = parent;
// cahnge window attributes like above
mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
values[0] = scr->black_pixel;
values[1] = XCB_EVENT_MASK_EXPOSURE;
xcb_void_cookie_t cookie =
xcb_change_window_attributes(con, win, mask, values);
xcb_generic_error_t *error = xcb_request_check(con, cookie);
if(error) {
std::cerr << "Could not configure window." << std::endl;
exit(1);
}
}
// open a font. "fixed" should hopefully be available everywhere
font = xcb_generate_id(con);
std::string font_name = "fixed";
cookie = xcb_open_font_checked(con, font, font_name.size(),
font_name.c_str());
error = xcb_request_check(con, cookie);
if(error) {
std::cerr << "Could not open font " << font_name << "." << std::endl;
exit(1);
}
// allocate white text graphics context with above font
txt_gc = xcb_generate_id(con);
mask = XCB_GC_FOREGROUND | XCB_GC_FONT;
values[0] = scr->white_pixel;
values[1] = font;
cookie = xcb_create_gc_checked(con, txt_gc, win, mask, values);
error = xcb_request_check(con, cookie);
if(error) {
std::cerr << "Could not create graphics context." << std::endl;
exit(1);
}
}
void draw(xcb_connection_t *connection, xcb_screen_t *screen, xcb_window_t window) {
if (NULL != testcase) {
DRAW_FUNC pf = (DRAW_FUNC)dlsym(0, testcase);
if (NULL != pf) {
fprintf(stderr, "call %s \n", testcase);
pf();
return;
}
}
//get_version();
xcb_font_t font = xcb_generate_id(connection);
xcb_void_cookie_t cookie_font = xcb_open_font_checked(connection, font, strlen(font_name_pattern), font_name_pattern);
xcb_generic_error_t *error = xcb_request_check(connection, cookie_font);
if (error) {
fprintf(stderr, "ERROR: can't open font :%d\n", error->error_code);
xcb_disconnect(connection);
exit(0);
}
xcb_gcontext_t gc = xcb_generate_id(connection);
uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
uint32_t value_list[3];
value_list[0] = screen->black_pixel;
value_list[1] = screen->white_pixel;
value_list[2] = font;
xcb_void_cookie_t cookie_gc = xcb_create_gc_checked(connection, gc, window, mask, value_list);
error = xcb_request_check(connection, cookie_gc);
if (error) {
fprintf(stderr, "ERROR: can't create gc: %d\n", error->error_code);
xcb_disconnect(connection);
exit(0);
}
cookie_font = xcb_close_font_checked(connection, font);
error = xcb_request_check(connection, cookie_font);
if (error) {
fprintf(stderr, "ERROR: can't close font: %d\n", error->error_code);
xcb_disconnect(connection);
exit(0);
}
glClearColor(1.0, 1.0, 1.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glFlush();
glColor3f(1.0f, 0.0f, 0.0f);
glRasterPos2f(0.0f, 0.0f);
glPushAttrib(GL_LIST_BIT);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
static int isFirstCall = 1;
static GLuint lists;
if (isFirstCall) {
lists = glGenLists(128);
}
#if 1
//for (i = 0; i < sizeof(letters)
glNewList(lists + 'A', GL_COMPILE);
glBitmap(8, 13, 0.0, 2.0, 10.0, 0.0, letters[0]);
glEndList();
GLubyte *str = (GLubyte*)"A";
#else
glXUseXFont(font, 0, 128, lists);
GLubyte *str = (GLubyte*)"Hello, world.";
#endif
glListBase(lists);
glCallLists(strlen(str), GL_UNSIGNED_BYTE, str);
glPopAttrib();
glFlush();
/* static int isFirstCall = 1;
static GLuint lists;
//load font
//gen list
if (isFirstCall) {
lists = glGenLists(128);
}
glXUseXFont(font, 0, 128, lists);
glListBase(lists);
char *str = "Hello, world";
for (; *str!='\0';++str) {
glCallList(lists + *str);
}
glFlush();
//glDeleteLists(lists, 256);
//use font
//draw text
//unuse font?
//delete list
//unload font*/
cookie_gc = xcb_free_gc(connection, gc);
error = xcb_request_check(connection, cookie_gc);
if (error) {
fprintf(stderr, "ERROR: can't free gc: %d\n", error->error_code);
xcb_disconnect(connection);
exit(0);
}
}
