int main() {
int width, height, cursorx, cursory, cbsize;
init(&width, &height); // Graphics initialization
cursorx = width / 2;
cursory = height / 2;
cbsize = (CUR_SIZ * 2) + 1;
VGImage CursorBuffer = vgCreateImage(VG_sABGR_8888, cbsize, cbsize, VG_IMAGE_QUALITY_BETTER);
if (mouseinit(width, height) != 0) {
fprintf(stderr, "Unable to initialize the mouse\n");
exit(1);
}
Start(width, height); // Start the picture
Background(0, 0, 0); // Black background
Fill(44, 77, 232, 1); // Big blue marble
Circle(width / 2, 0, width); // The "world"
Fill(255, 255, 255, 1); // White text
TextMid(width / 2, height / 2, "hello, world", SerifTypeface, width / 10); // Greetings
End(); // update picture
// MAIN LOOP
while (left_count < 2) { // Loop until the left mouse button pressed & released
// if the mouse moved...
if (mouse.x != cursorx || mouse.y != cursory) {
restoreCursor(CursorBuffer);
cursorx = mouse.x;
cursory = mouse.y;
saveCursor(CursorBuffer, cursorx, cursory, width, height, CUR_SIZ);
circleCursor(cursorx, cursory, width, height, CUR_SIZ);
End(); // update picture
}
}
restoreCursor(CursorBuffer); // not strictly necessary as display will be closed
vgDestroyImage(CursorBuffer); // tidy up memory
finish(); // Graphics cleanup
exit(0);
}
void draw_cursor(int curx, int cury, int width, int height, int s)
{
circleCursor(cursorx, cursory, mouse.max_x, mouse.max_y, CUR_SIZ);
}
