Subversion Repositories Kolibri OS

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;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;;

;; Distributed under terms of the GNU General Public License    ;;

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SYSTEM FUNCTIONS of OS Kolibri 0.7.7.0

Number of the function is located in the register eax.

The call of the system function is executed by "int 0x40" command.

All registers except explicitly declared in the returned value,

    including eflags, are preserved.

======================================================================

============== Function 0 - define and draw the window. ==============

======================================================================

Defines an application window. Draws a frame of the window, header and

working area. For skinned windows defines standard close and minimize

buttons.

Parameters:

  * eax = 0 - function number

  * ebx = [coordinate on axis x]*65536 + [size on axis x]

  * ecx = [coordinate on axis y]*65536 + [size on axis y]

  * edx = 0xXYRRGGBB, where:

    * Y = style of the window:

      * Y=1 - only define window area, draw nothing

      * Y=3 - skinned window

      * Y=4 - skinned fixed-size window

      * Y=0,2 window types are outdated and should not be used anymore,

        they are retained for compatibility with old programs.

      * other possible values (from 5 to 15) are reserved,

        function call with such Y is ignored

    * RR, GG, BB = accordingly red, green, blue components of a color

      of the working area of the window (are ignored for style Y=1)

    * X = DCBA (bits)

      * A = 1 - window has caption

      * B = 1 - coordinates of all graphics primitives are relative to

                  window client area

      * C = 1 - don't fill working area on window draw

      * D = 0 - normal filling of the working area, 1 - gradient

    The following parameters are intended for windows

    of a type I and II, and ignored for styles Y=1,3:

  * esi = 0xXYRRGGBB - color of the header

    * RR, GG, BB define color

    * Y=0 - usual window, Y=1 - unmovable window (works for all window styles)

    * X not used, other values of Y are reserved

  * edi = caption string for styles Y=3,4 (also can be set by func 71.1)

Returned value:

  * function does not return value

Remarks:

  * Position and sizes of the window are installed by the first

    call of this function and are ignored at subsequent; to change

    position and/or sizes of already created window use function 67.

  * For windows with styles Y=3,4 and caption (A=1) caption string

    is set by the first call of this function and is ignored

    at subsequent (strictly speaking, is ignored after a call to

    subfunction 2 of function 12 - end redraw); to change caption of

    already created window use subfunction 1 of function 71.

  * If the window has appropriate styles, position and/or sizes can be

    changed by user. Current position and sizes can be obtained

    by function 9.

  * The window must fit on the screen. If the transferred

    coordinates and sizes do not satisfy to this condition,

    appropriate coordinate (or, probably, both) is considered as zero,

    and if it does not help too, the appropriate size

    (or, probably, both) is installed in a size of the screen.

    Further let us designate xpos,ypos,xsize,ysize - values passed

    in ebx,ecx. The coordinates are resulted concerning

    the left upper corner of the window, which, thus, is set as (0,0),

    coordinates of the right lower corner essence (xsize,ysize).

  * The sizes of the window are understood in sence of coordinates

    of the right lower corner. This concerns all other functions too.

    It means, that the real sizes are on 1 pixel more.

  * The window of style Y=1 looks as follows:

    * completely defined by the application

  * The skinned window Y=3,4 looks as follows:

    * draw external frame of width 1 pixel

      with color 'outer' from the skin

    * draw intermediate frame of width 3 pixel

      with color 'frame' from the skin

    * draw internal frame of width 1 pixel

      with color 'inner' from the skin

    * draw header (on bitmaps from the skin) in a rectangle

      (0,0) - (xsize,_skinh-1)

    * if ysize>=26, fill the working area of the window -

      rectangle with the left upper corner (5,_skinh) and right lower

      (xsize-5,ysize-5) with color indicated in edx

      (taking a gradient into account)

    * define two standard buttons: close and minimize

      (see function 8)

    * if A=1 and edi contains (nonzero) pointer to caption string,

      it is drawn in place in header defined in the skin

    * value _skinh is accessible as the result of call

      subfunction 4 of function 48

---------------------- Constants for registers: ----------------------

  eax - SF_CREATE_WINDOW (0)

======================================================================

================ Function 1 - put pixel in the window. ===============

======================================================================

Parameters:

  * eax = 1 - function number

  * ebx = x-coordinate (relative to the window)

  * ecx = y-coordinate (relative to the window)

  * edx = 0x00RRGGBB - color of a pixel

    edx = 0x01xxxxxx - invert color of a pixel

          (low 24 bits are ignored)

Returned value:

  * function does not return value

---------------------- Constants for registers: ----------------------

  eax - SF_PUT_PIXEL (1)

======================================================================

============ Function 2 - get the code of the pressed key. ===========

======================================================================

Takes away the code of the pressed key from the buffer.

Parameters:

  * eax = 2 - function number

Returned value:

  * if the buffer is empty, function returns eax=1

  * if the buffer is not empty, function returns al=0,

    ah=code of the pressed key,

    bits 16-23 = contain scancode for pressed key in ASCII mode,

                 in the scancodes mode this bits cleared.

    bits 23-31 = zero

  * if there is "hotkey", function returns al=2,

    ah=scancode of the pressed key (0 for control keys),

    high word of eax contains a status of control keys at the moment

    of pressing a hotkey

Remarks:

  * There is a common system buffer of the pressed keys

    by a size of 120 bytes, organized as queue.

  * There is one more common system buffer on 120 "hotkeys".

  * If the application with the inactive window calls this function,

    the buffer of the pressed keys is considered to be empty.

  * By default this function returns ASCII-codes; to switch

    to the scancodes mode (and back) use function 66.

    However, hotkeys are always notificated as scancodes.

  * To find out, what keys correspond to what codes, start

    the application keyascii and scancode.

  * Scancodes come directly from keyboard and are fixed;

    ASCII-codes turn out with usage of the conversion tables,

    which can be set by subfunction 2 of function 21

    and get by subfunction 2 of function 26.

  * As a consequence, ASCII-codes take into account current

    keyboard layout (rus/en) as opposed to scancodes.

  * This function notifies only about those hotkeys, which were

    defined by this thread by subfunction 4 of function 66.

---------------------- Constants for registers: ----------------------

  eax - SF_GET_KEY (2)

======================================================================

==================== Function 3 - get system time. ===================

======================================================================

Parameters:

  * eax = 3 - function number

Returned value:

  * eax = 0x00SSMMHH, where HH:MM:SS = Hours:Minutes:Seconds

  * each item is BCD-number, for example,

    for time 23:59:59 function returns 0x00595923

Remarks:

  * See also subfunction 9 of function 26 - get time from

    the moment of start of the system; it is more convenient, because

    returns simply DWORD-value of the time counter.

  * System time can be set by function 22.

---------------------- Constants for registers: ----------------------

  eax - SF_GET_SYS_TIME (3)

======================================================================

=================== Function 4 - draw text string. ===================

======================================================================

Parameters:

  * eax = 4 - function number

  * ebx = X*65536+Y, coordinates in the window or buffer

  * ecx = 0xXXRRGGBB, where

    * RR, GG, BB specify text color

    * XX = ABFFCSSS (bits):

      * A=1 - output zero terminated string

      * B=1 - fill background (color = edi)

      * FF specifies the font and encoding: