Subversion Repositories Kolibri OS

SYSTEM FUNCTIONS of OS Kolibri 0.7.0.0

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.

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============== 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=0 - type I - fixed-size window

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

      * Y=2 - type II - variable-size window

      * Y=3 - skinned window

      * Y=4 - skinned window with fixed sizes

      * other possible values (from 4 up 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=2)

    * X = DCBA (bits)

      * A = 1 - window has caption; for style Y=3 caption string

                  must be passed in edi, for other styles use

                  subfunction 1 of function 71

      * 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

    * X defines a gradient of header: X=0 - no gradient,

      X=8 - usual gradient,

      for windows of a type II X=4 - negative gradient

    * other values of X and Y are reserved

  * edi = 0x00RRGGBB - color of the frame

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 style Y=3 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 type I looks as follows:

    * draw external frame of color indicated in edi, 1 pixel in width

    * draw header - rectangle with the left upper corner (1,1) and

      right lower (xsize-1,min(25,ysize)) color indicated in esi

      (taking a gradient into account)

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

      rectangle with the left upper corner (1,21) and right lower

      (xsize-1,ysize-1) (sizes (xsize-1)*(ysize-21)) with color

      indicated in edx (taking a gradient into account)

    * if A=1 and caption has been already set by subfunction 1

      of function 71, it is drawn in the corresponding place of header

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

    * completely defined by the application

  * The window of type II looks as follows:

    * draw external frame of width 1 pixel with the "shaded" color

      edi (all components of the color decrease twice)

    * draw intermediate frame of width 3 pixels with color edi

    * draw internal frame of width 1 pixel with the "shaded" color edi

    * draw header - rectangle with the left upper corner (4,4)

      and right lower (xsize-4,min(20,ysize)) color, indicated in esi

      (taking a gradient into account)

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

      rectangle with the left upper corner (5,20) and right lower

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

      (taking a gradient into account)

    * if A=1 and caption has been already set by subfunction 1

      of function 71, it is drawn in the corresponding place of header

  * The skinned window 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

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

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

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

============ 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, high word of eax is 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.

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

==================== 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.

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

============ Function 4 - draw text string in the window. ============

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

Parameters:

  * eax = 4 - function number

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

  * ecx = 0xX0RRGGBB, where

    * RR, GG, BB specify text color

    * X=ABnn (bits):

    * nn specifies the used font: 0=system monospaced,

      1=system font of variable width