vnc-test.c

来自「eCos操作系统源码」· C语言 代码 · 共 446 行 · 第 1/2 页

    while(1)
    {
        FD_ZERO(&sock_desc);  /* Zero the socket set descriptor */

        if (kbd_handle)
        {
            FD_SET(kbd_handle, &sock_desc);  /* Add the keyboard handle to the set */
        }

        if (mouse_handle)
        {
            FD_SET(mouse_handle, &sock_desc);  /* Add the mouse handle to the set */
        }

        /* Use select to wait until a keyboard or mouse event occurs*/
        select(max_handle+1, &sock_desc, NULL, NULL, NULL);

        /* Check for a keyboard event */
        if (FD_ISSET(kbd_handle, &sock_desc))
        {
            kbd_len = 4;

            /* Read keyboard data until there is none left */
            while (kbd_len == 4)
                {
                /* Read 4 bytes from keyboard */
                kbd_len = read(kbd_handle, kbd_data, 4);

                if (kbd_len == 4)
        {
            if (kbd_data[1])
            {
                diag_printf("Keyboard data: keysym value 0x%x is pressed\n",
                             kbd_data[2]*256 + kbd_data[3]);
            }
            else
            {
                diag_printf("Keyboard data: keysym value 0x%x is released\n",
                             kbd_data[2]*256 + kbd_data[3]);
            }
                }
            }
        }

        /* Check for a mouse event */
        if (FD_ISSET(mouse_handle, &sock_desc))
        {
            mouse_len = 8;

            /* Read mouse data until there is none left */
            while (mouse_len == 8)
            {
                /* Read 8 bytes from mouse */
                mouse_len = read(mouse_handle, mouse_data, 8);

                if (mouse_len == 8)
                {
                    HideCursor();  /* Hide the old cursor */
                    cursor_x = mouse_data[2]*256 + mouse_data[3];
                    cursor_y = mouse_data[4]*256 + mouse_data[5];

                    if (mouse_data[1] && !last_mouse_button)
                    {
                        /* Ring bell and change colours of bell message text if the */
                        /* mouse button is pressed on a yellow pixel                */
                        if (VncReadPixel(mouse_data[2]*256 + mouse_data[3],
                                         mouse_data[4]*256 + mouse_data[5]) == VNC_YELLOW)
                        {
                            VncSoundBell();  /* Ring bell on the client */

                            if (bell_text_state)
                            {
                                bell_text_state = 0;
                                /* Draw a background for the text */
                                VncFillRect(bell_text_x_pos,  /* x1 */
                                            bell_text_y_pos,  /* y1 */
                                            bell_text_x_pos + bell_text_width,  /* x2 */
                                            bell_text_y_pos + bell_text_height, /* y2 */
                                            VNC_BLUE);  /* Colour */
                                /* Write the text on the background */
                                print_area = VncPrintf(0, 1, VNC_YELLOW, bell_text_x_pos, bell_text_y_pos, "%s", bell_message);

                            }
                            else
                            {
                                bell_text_state = 1;
                                /* Draw a background for the text */
                                VncFillRect(bell_text_x_pos,  /* x1 */
                                            bell_text_y_pos,  /* y1 */
                                            bell_text_x_pos + bell_text_width,  /* x2 */
                                            bell_text_y_pos + bell_text_height, /* y2 */
                                            VNC_YELLOW);  /* Colour */
                                /* Write the text on the background */
                                print_area = VncPrintf(0, 1, VNC_BLUE, bell_text_x_pos, bell_text_y_pos, "%s", bell_message);
                            }
                        }
                    }

                    last_mouse_button = mouse_data[1];  /* Save mouse button data */
                    DrawCursor();  /* Draw the new cursor */
                }
            }

        }
    }

    return 1;
}


vnc_colour_t under_cursor[16][16];  /* Buffer to hold display area under cursor */

    /* Buffer holding cursor data */
#define BLK VNC_BLACK
#define TRN VNC_BLUE
#define WHT VNC_WHITE
#define GRY VNC_LTGRAY
vnc_colour_t cursor[16][16] = {{BLK, BLK, BLK, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN},
                               {BLK, GRY, GRY, BLK, BLK, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN},
                               {BLK, WHT, GRY, GRY, GRY, BLK, BLK, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN},
                               {TRN, BLK, WHT, GRY, GRY, GRY, GRY, BLK, BLK, TRN, TRN, TRN, TRN, TRN, TRN, TRN},
                               {TRN, BLK, WHT, WHT, GRY, GRY, GRY, GRY, GRY, BLK, BLK, TRN, TRN, TRN, TRN, TRN},
                               {TRN, TRN, BLK, WHT, WHT, GRY, GRY, GRY, GRY, GRY, GRY, BLK, BLK, TRN, TRN, TRN},
                               {TRN, TRN, BLK, WHT, WHT, WHT, GRY, GRY, GRY, GRY, GRY, GRY, GRY, BLK, TRN, TRN},
                               {TRN, TRN, TRN, BLK, WHT, WHT, WHT, GRY, GRY, BLK, BLK, BLK, BLK, BLK, TRN, TRN},
                               {TRN, TRN, TRN, BLK, WHT, WHT, WHT, WHT, GRY, GRY, BLK, TRN, TRN, TRN, TRN, TRN},
                               {TRN, TRN, TRN, TRN, BLK, WHT, WHT, BLK, WHT, GRY, GRY, BLK, TRN, TRN, TRN, TRN},
                               {TRN, TRN, TRN, TRN, BLK, WHT, WHT, BLK, BLK, WHT, GRY, GRY, BLK, TRN, TRN, TRN},
                               {TRN, TRN, TRN, TRN, TRN, BLK, WHT, BLK, TRN, BLK, WHT, GRY, GRY, BLK, TRN, TRN},
                               {TRN, TRN, TRN, TRN, TRN, BLK, WHT, BLK, TRN, TRN, BLK, WHT, GRY, GRY, BLK, TRN},
                               {TRN, TRN, TRN, TRN, TRN, TRN, BLK, TRN, TRN, TRN, TRN, BLK, WHT, GRY, GRY, BLK},
                               {TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, BLK, WHT, BLK, TRN},
                               {TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, TRN, BLK, TRN, TRN}};
#undef BLK
#undef TRN
#undef WHT
#undef GRY

void DrawCursor(void)
{
    int rect_width, rect_height;

    if (cursor_x >= display_info->frame_width)
    {
        /* Cursor is off the screen */
        return;
    }
    else if ((cursor_x + 16) >= display_info->frame_width)
    {
        /* Cursor is partially off the screen */
        rect_width = display_info->frame_width - cursor_x;
    }
    else
    {
        /* Cursor is fully on the screen */
        rect_width = 16;
    }

    if (cursor_y >= display_info->frame_height)
    {
        /* Cursor is off the screen */
        return;
    }
    else if ((cursor_y + 16) >= display_info->frame_height)
    {
        /* Cursor is partially off the screen */
        rect_height = display_info->frame_height - cursor_y;
    }
    else
    {
        /* Cursor is fully on the screen */
        rect_height = 16;
    }

    /* Save the area under the cursor */
    VncCopyRect2Buffer(cursor_x, cursor_y, rect_width, rect_height, under_cursor, 16, 16, 0, 0);

    /* Draw the new cursor */
    VncCopyBuffer2RectMask(cursor, 16, 16, 0, 0, cursor_x, cursor_y, rect_width, rect_height, VNC_BLUE);
}


void HideCursor(void)
{
    int rect_width, rect_height;

    if (cursor_x >= display_info->frame_width)
    {
        /* Cursor is off the screen */
        return;
    }
    else if ((cursor_x + 16) >= display_info->frame_width)
    {
        /* Cursor is partially off the screen */
        rect_width = display_info->frame_width - cursor_x;
    }
    else
    {
        /* Cursor is fully on the screen */
        rect_width = 16;
    }

    if (cursor_y >= display_info->frame_height)
    {
        /* Cursor is off the screen */
        return;
    }
    else if ((cursor_y + 16) >= display_info->frame_height)
    {
        /* Cursor is partially off the screen */
        rect_height = display_info->frame_height - cursor_y;
    }
    else
    {
        /* Cursor is fully on the screen */
        rect_height = 16;
    }

    /* Restore the saved area under the cursor */
    VncCopyBuffer2Rect(under_cursor, 16, 16, 0, 0, cursor_x, cursor_y, rect_width, rect_height);
}