kolibrios/kernel/trunk/video/cursors.inc

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                                                              ;;
;; Copyright (C) KolibriOS team 2004-2018. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License    ;;
;;                                                              ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

$Revision$


LOAD_FROM_FILE  = 0
LOAD_FROM_MEM   = 1
LOAD_INDIRECT   = 2
LOAD_SYSTEM     = 3

struct  BITMAPINFOHEADER
        Size                    dd ?
        Width                   dd ?
        Height                  dd ?
        Planes                  dw ?
        BitCount                dw ?
        Compression             dd ?
        SizeImage               dd ?
        XPelsPerMeter           dd ?
        YPelsPerMeter           dd ?
        ClrUsed                 dd ?
        ClrImportant            dd ?
ends
;------------------------------------------------------------------------------
align 4
proc init_cursor stdcall, dst:dword, src:dword
           locals
             rBase    dd ?
             pQuad    dd ?
             pBits    dd ?
             pAnd     dd ?
             width    dd ?
             height   dd ?
             counter  dd ?
           endl

        mov     esi, [src]
        add     esi, [esi+18]
        mov     eax, esi

        cmp     [esi+BITMAPINFOHEADER.BitCount], 24
        je      .img_24
        cmp     [esi+BITMAPINFOHEADER.BitCount], 8
        je      .img_8
        cmp     [esi+BITMAPINFOHEADER.BitCount], 4
        je      .img_4
;--------------------------------------
align 4
.img_2:
        add     eax, [esi]
        mov     [pQuad], eax
        add     eax, 8
        mov     [pBits], eax
        add     eax, 128
        mov     [pAnd], eax
        mov     eax, [esi+4]
        mov     [width], eax
        mov     ebx, [esi+8]
        shr     ebx, 1
        mov     [height], ebx

        mov     edi, [dst]
        add     edi, 32*31*4
        mov     [rBase], edi

        mov     esi, [pQuad]
;--------------------------------------
align 4
.l21:
        mov     ebx, [pBits]
        mov     ebx, [ebx]
        bswap   ebx
        mov     eax, [pAnd]
        mov     eax, [eax]
        bswap   eax
        mov     [counter], 32
;--------------------------------------
align 4
@@:
        xor     edx, edx
        shl     eax, 1
        setc    dl
        dec     edx

        xor     ecx, ecx
        shl     ebx, 1
        setc    cl
        mov     ecx, [esi+ecx*4]
        and     ecx, edx
        and     edx, 0xFF000000
        or      edx, ecx
        mov     [edi], edx

        add     edi, 4
        dec     [counter]
        jnz     @B

        add     [pBits], 4
        add     [pAnd], 4
        mov     edi, [rBase]
        sub     edi, 128
        mov     [rBase], edi
        sub     [height], 1
        jnz     .l21
        ret
;--------------------------------------
align 4
.img_4:
        add     eax, [esi]
        mov     [pQuad], eax
        add     eax, 64
        mov     [pBits], eax
        add     eax, 0x200
        mov     [pAnd], eax
        mov     eax, [esi+4]
        mov     [width], eax
        mov     ebx, [esi+8]
        shr     ebx, 1
        mov     [height], ebx

        mov     edi, [dst]
        add     edi, 32*31*4
        mov     [rBase], edi

        mov     esi, [pQuad]
        mov     ebx, [pBits]
;--------------------------------------
align 4
.l4:
        mov     eax, [pAnd]
        mov     eax, [eax]
        bswap   eax
        mov     [counter], 16
;--------------------------------------
align 4
@@:
        xor     edx, edx
        shl     eax, 1
        setc    dl
        dec     edx

        movzx   ecx, byte [ebx]
        and     cl, 0xF0
        shr     ecx, 2
        mov     ecx, [esi+ecx]
        and     ecx, edx
        and     edx, 0xFF000000
        or      edx, ecx
        mov     [edi], edx

        xor     edx, edx
        shl     eax, 1
        setc    dl
        dec     edx

        movzx   ecx, byte [ebx]
        and     cl, 0x0F
        mov     ecx, [esi+ecx*4]
        and     ecx, edx
        and     edx, 0xFF000000
        or      edx, ecx
        mov     [edi+4], edx

        inc     ebx
        add     edi, 8
        dec     [counter]
        jnz     @B

        add     [pAnd], 4
        mov     edi, [rBase]
        sub     edi, 128
        mov     [rBase], edi
        sub     [height], 1
        jnz     .l4
        ret
;--------------------------------------
align 4
.img_8:
        add     eax, [esi]
        mov     [pQuad], eax
        add     eax, 1024
        mov     [pBits], eax
        add     eax, 1024
        mov     [pAnd], eax
        mov     eax, [esi+4]
        mov     [width], eax
        mov     ebx, [esi+8]
        shr     ebx, 1
        mov     [height], ebx

        mov     edi, [dst]
        add     edi, 32*31*4
        mov     [rBase], edi

        mov     esi, [pQuad]
        mov     ebx, [pBits]
;--------------------------------------
align 4
.l81:
        mov     eax, [pAnd]
        mov     eax, [eax]
        bswap   eax
        mov     [counter], 32
;--------------------------------------
align 4
@@:
        xor     edx, edx
        shl     eax, 1
        setc    dl
        dec     edx

        movzx   ecx, byte [ebx]
        mov     ecx, [esi+ecx*4]
        and     ecx, edx
        and     edx, 0xFF000000
        or      edx, ecx
        mov     [edi], edx

        inc     ebx
        add     edi, 4
        dec     [counter]
        jnz     @B

        add     [pAnd], 4
        mov     edi, [rBase]
        sub     edi, 128
        mov     [rBase], edi
        sub     [height], 1
        jnz     .l81
        ret
;--------------------------------------
align 4
.img_24:
        add     eax, [esi]
        mov     [pQuad], eax
        add     eax, 0xC00
        mov     [pAnd], eax
        mov     eax, [esi+BITMAPINFOHEADER.Width]
        mov     [width], eax
        mov     ebx, [esi+BITMAPINFOHEADER.Height]
        shr     ebx, 1
        mov     [height], ebx

        mov     edi, [dst]
        add     edi, 32*31*4
        mov     [rBase], edi

        mov     esi, [pAnd]
        mov     ebx, [pQuad]
;--------------------------------------
align 4
.row_24:
        mov     eax, [esi]
        bswap   eax
        mov     [counter], 32
;--------------------------------------
align 4
@@:
        xor     edx, edx
        shl     eax, 1
        setc    dl
        dec     edx

        mov     ecx, [ebx]
        and     ecx, 0x00FFFFFF
        and     ecx, edx
        and     edx, 0xFF000000
        or      edx, ecx
        mov     [edi], edx
        add     ebx, 3
        add     edi, 4
        dec     [counter]
        jnz     @B

        add     esi, 4
        mov     edi, [rBase]
        sub     edi, 128
        mov     [rBase], edi
        sub     [height], 1
        jnz     .row_24
        ret
endp
;------------------------------------------------------------------------------
align 4
proc set_cursor stdcall, hcursor:dword
        mov     eax, [hcursor]
        cmp     [eax+CURSOR.magic], 'CURS'
        jne     .fail
;           cmp [eax+CURSOR.size], CURSOR_SIZE
;           jne .fail
        mov     ebx, [current_slot]
        xchg    eax, [ebx+APPDATA.cursor]
        jmp     .end
;--------------------------------------
align 4
.fail:
        mov     eax, [def_cursor]
        mov     ebx, [current_slot]
        xchg    eax, [ebx+APPDATA.cursor]
align 4
.end:
        mov     [redrawmouse_unconditional], 1
        call    __sys_draw_pointer
        ret
endp
;------------------------------------------------------------------------------
align 4
; param
;  eax= pid
;  ebx= src
;  ecx= flags

create_cursor:
.src     equ esp
.flags   equ esp+4
.hcursor equ esp+8

        sub     esp, 4         ;space for .hcursor
        push    ecx
        push    ebx

        mov     ebx, eax
        mov     eax, sizeof.CURSOR
        call    create_kernel_object
        test    eax, eax
        jz      .fail

        mov     [.hcursor], eax

        xor     ebx, ebx
        mov     [eax+CURSOR.magic], 'CURS'
        mov     [eax+CURSOR.destroy], destroy_cursor
        mov     [eax+CURSOR.hot_x], ebx
        mov     [eax+CURSOR.hot_y], ebx

        stdcall kernel_alloc, 0x1000
        test    eax, eax
        jz      .fail

        mov     edi, [.hcursor]
        mov     [edi+CURSOR.base], eax

        mov     esi, [.src]
        mov     ebx, [.flags]
        cmp     bx, LOAD_INDIRECT
        je      .indirect

        movzx   ecx, word [esi+10]
        movzx   edx, word [esi+12]
        mov     [edi+CURSOR.hot_x], ecx
        mov     [edi+CURSOR.hot_y], edx

        stdcall init_cursor, eax, esi

align 4
.add_cursor:
        mov     ecx, [.hcursor]
        lea     ecx, [ecx+CURSOR.list_next]
        lea     edx, [_display.cr_list.next]

        pushfd
        cli
        list_add ecx, edx   ;list_add_tail(new, head)
        popfd

        mov     eax, [.hcursor]
        cmp     [_display.init_cursor], 0
        je      .fail

        push    eax
        call    [_display.init_cursor]
        add     esp, 4

        mov     eax, [.hcursor]
;--------------------------------------
align 4
.fail:
        add     esp, 12
        ret
;--------------------------------------
align 4
.indirect:
        shr     ebx, 16
        movzx   ecx, bh
        movzx   edx, bl
        mov     [edi+CURSOR.hot_x], ecx
        mov     [edi+CURSOR.hot_y], edx

        xchg    edi, eax
        mov     ecx, 1024
        cld
        rep movsd
        jmp     .add_cursor
;------------------------------------------------------------------------------
align 4
proc load_cursor stdcall, src:dword, flags:dword
           locals
             handle  dd ?
           endl

        xor     eax, eax
        cmp     [create_cursor], eax
        je      .fail2

        mov     [handle], eax
        cmp     word [flags], LOAD_FROM_FILE
        jne     @F

        stdcall load_file, [src]
        test    eax, eax
        jz      .fail
        mov     [src], eax
;--------------------------------------
align 4
@@:
        push    ebx
        push    esi
        push    edi

        mov     eax, [CURRENT_TASK]
        shl     eax, 5
        mov     eax, [CURRENT_TASK+eax+4]
        mov     ebx, [src]
        mov     ecx, [flags]
        call    create_cursor    ;eax, ebx, ecx
        mov     [handle], eax

        cmp     word [flags], LOAD_FROM_FILE
        jne     .exit
        stdcall kernel_free, [src]
;--------------------------------------
align 4
.exit:
        pop     edi
        pop     esi
        pop     ebx
;--------------------------------------
align 4
.fail:
        mov     eax, [handle]
;--------------------------------------
align 4
.fail2:
        ret
endp
;------------------------------------------------------------------------------
align 4
proc delete_cursor stdcall, hcursor:dword

;        DEBUGF 1,'K : delete_cursor %x\n', [hcursor]

        mov     esi, [hcursor]

        cmp     [esi+CURSOR.magic], 'CURS'
        jne     .fail

        mov     ebx, [CURRENT_TASK]
        shl     ebx, 5
        mov     ebx, [CURRENT_TASK+ebx+4]
        cmp     ebx, [esi+CURSOR.pid]
        jne     .fail

        mov     ebx, [current_slot]
        cmp     esi, [ebx+APPDATA.cursor]
        jne     @F
        mov     eax, [def_cursor]
        mov     [ebx+APPDATA.cursor], eax
;--------------------------------------
align 4
@@:
        mov     eax, [hcursor]
        call    [eax+APPOBJ.destroy]
;--------------------------------------
align 4
.fail:
        ret
endp
;------------------------------------------------------------------------------
align 4
; param
;  eax= cursor
destroy_cursor:

        push    eax
        stdcall kernel_free, [eax+CURSOR.base]

        mov     eax, [esp]
        lea     eax, [eax+CURSOR.list_next]

        pushfd
        cli
        list_del eax
        popfd

        pop     eax
        call    destroy_kernel_object
        ret
;------------------------------------------------------------------------------
align 4
select_cursor:
        mov     eax, [esp+4]
        mov     [_display.cursor], eax
        ret     4
;------------------------------------------------------------------------------
align 4
proc restore_24 stdcall, x:dword, y:dword

        push    ebx

        mov     ebx, [cur_saved_base]
        mov     edx, [cur.h]
        test    edx, edx
        jz      .ret

        push    esi
        push    edi

        mov     esi, cur_saved_data
        mov     ecx, [cur.w]
        lea     ecx, [ecx+ecx*2]
        push    ecx
;--------------------------------------
align 4
@@:
        mov     edi, ebx
        add     ebx, [_display.lfb_pitch]

        mov     ecx, [esp]
        rep movsb
        dec     edx
        jnz     @B

        pop     ecx
        pop     edi
        pop     esi
;--------------------------------------
align 4
.ret:
        pop     ebx
        ret
endp
;------------------------------------------------------------------------------
align 4
proc restore_32 stdcall, x:dword, y:dword

        push    ebx

        mov     ebx, [cur_saved_base]
        mov     edx, [cur.h]
        test    edx, edx
        jz      .ret

        push    esi
        push    edi

        mov     esi, cur_saved_data
;--------------------------------------
align 4
@@:
        mov     edi, ebx
        add     ebx, [_display.lfb_pitch]

        mov     ecx, [cur.w]
        rep movsd
        dec     edx
        jnz     @B

        pop     edi
        pop     esi

;--------------------------------------
align 4
.ret:
        pop     ebx
        ret
endp
;------------------------------------------------------------------------------
align 4
proc restore_16 stdcall, x:dword, y:dword

        push    ebx

        mov     ebx, [cur_saved_base]
        mov     edx, [cur.h]
        test    edx, edx
        jz      .ret

        push    esi
        push    edi

        mov     esi, cur_saved_data
;--------------------------------------
align 4
@@:
        mov     edi, ebx
        add     ebx, [_display.lfb_pitch]

        mov     ecx, [cur.w]
        rep movsw
        dec     edx
        jnz     @B

        pop     edi
        pop     esi

;--------------------------------------
align 4
.ret:
        pop     ebx
        ret
endp
;------------------------------------------------------------------------------
align 4
proc move_cursor_24 stdcall, hcursor:dword, x:dword, y:dword
           locals
             h      dd ?
             _dx     dd ?
             _dy     dd ?
           endl

        mov     esi, [hcursor]
        mov     ecx, [x]
        mov     eax, [y]
;        mov     ebx, [BytesPerScanLine]

        xor     edx, edx
        sub     ecx, [esi+CURSOR.hot_x]
        lea     ebx, [ecx+32-1]
        mov     [x], ecx
        sets    dl
        dec     edx
        and     ecx, edx      ;clip x to 0<=x
        mov     [cur.left], ecx
        mov     edi, ecx
        sub     edi, [x]
        mov     [_dx], edi

        xor     edx, edx
        sub     eax, [esi+CURSOR.hot_y]
        lea     edi, [eax+32-1]
        mov     [y], eax
        sets    dl
        dec     edx
        and     eax, edx      ;clip y to 0<=y
        mov     [cur.top], eax
        mov     edx, eax
        sub     edx, [y]
        mov     [_dy], edx

;        mul     dword [BytesPerScanLine]
        mov     eax, [BPSLine_calc_area+eax*4]
        lea     edx, [LFB_BASE+ecx*3]
        add     edx, eax
        mov     [cur_saved_base], edx

        cmp     ebx, [_display.width]
        jb      @F
        mov     ebx, [_display.width]
;--------------------------------------
align 4
@@:
        cmp     edi, [_display.height]
        jb      @F
        mov     edi, [_display.height]
;--------------------------------------
align 4
@@:

        sub     ebx, [x]
        sub     edi, [y]
        sub     ebx, [_dx]
        sub     edi, [_dy]

        mov     [cur.w], ebx
        mov     [cur.h], edi
        mov     [h], edi

        mov     eax, edi
        mov     edi, cur_saved_data
;--------------------------------------
align 4
@@:
        mov     esi, edx
        add     edx, [_display.lfb_pitch]
        mov     ecx, [cur.w]
        lea     ecx, [ecx+ecx*2]
        rep movsb
        dec     eax
        jnz     @B

;draw cursor
        mov     ebx, [cur_saved_base]
        mov     eax, [_dy]
        shl     eax, 5
        add     eax, [_dx]

        mov     esi, [hcursor]
        mov     esi, [esi+CURSOR.base]
        lea     edx, [esi+eax*4]
;--------------------------------------
align 4
.row:
        mov     ecx, [cur.w]
        mov     esi, edx
        mov     edi, ebx
        add     edx, 32*4
        add     ebx, [_display.lfb_pitch]
;--------------------------------------
align 4
.pix:
        lodsd
        test    eax, 0xFF000000
        jz      @F
        mov     [edi], ax
        shr     eax, 16
        mov     [edi+2], al
;--------------------------------------
align 4
@@:
        add     edi, 3
        dec     ecx
        jnz     .pix

        dec     [h]
        jnz     .row
        ret
endp
;------------------------------------------------------------------------------
align 4
proc move_cursor_32 stdcall, hcursor:dword, x:dword, y:dword
           locals
             h      dd ?
             _dx     dd ?
             _dy     dd ?
           endl

        mov     esi, [hcursor]
        mov     ecx, [x]
        mov     eax, [y]

        xor     edx, edx
        sub     ecx, [esi+CURSOR.hot_x]
        lea     ebx, [ecx+32-1]
        mov     [x], ecx
        sets    dl
        dec     edx
        and     ecx, edx      ;clip x to 0<=x
        mov     [cur.left], ecx
        mov     edi, ecx
        sub     edi, [x]
        mov     [_dx], edi

        xor     edx, edx
        sub     eax, [esi+CURSOR.hot_y]
        lea     edi, [eax+32-1]
        mov     [y], eax
        sets    dl
        dec     edx
        and     eax, edx      ;clip y to 0<=y
        mov     [cur.top], eax
        mov     edx, eax
        sub     edx, [y]
        mov     [_dy], edx

;        mul     dword [BytesPerScanLine]
        mov     eax, [BPSLine_calc_area+eax*4]
        lea     edx, [LFB_BASE+eax+ecx*4]
        mov     [cur_saved_base], edx

        cmp     ebx, [_display.width]
        jb      @F
        mov     ebx, [_display.width]
;--------------------------------------
align 4
@@:
        cmp     edi, [_display.height]
        jb      @F
        mov     edi, [_display.height]
;--------------------------------------
align 4
@@:
        sub     ebx, [x]
        sub     edi, [y]
        sub     ebx, [_dx]
        sub     edi, [_dy]

        mov     [cur.w], ebx
        mov     [cur.h], edi
        mov     [h], edi

        mov     eax, edi
        mov     edi, cur_saved_data
;--------------------------------------
align 4
@@:
        mov     esi, edx
        add     edx, [_display.lfb_pitch]
        mov     ecx, [cur.w]
        rep movsd
        dec     eax
        jnz     @B

;draw cursor
        mov     ebx, [cur_saved_base]
        mov     eax, [_dy]
        shl     eax, 5
        add     eax, [_dx]

        mov     esi, [hcursor]
        mov     esi, [esi+CURSOR.base]
        lea     edx, [esi+eax*4]
;--------------------------------------
align 4
.row:
        mov     ecx, [cur.w]
        mov     esi, edx
        mov     edi, ebx
        add     edx, 32*4
        add     ebx, [_display.lfb_pitch]
;--------------------------------------
align 4
.pix:
        lodsd
        test    eax, 0xFF000000
        jz      @F
        mov     [edi], eax
;--------------------------------------
align 4
@@:
        add     edi, 4
        dec     ecx
        jnz     .pix

        dec     [h]
        jnz     .row
        ret
endp
;------------------------------------------------------------------------------
align 4
proc move_cursor_16 stdcall, hcursor:dword, x:dword, y:dword
           locals
             h      dd ?
             _dx     dd ?
             _dy     dd ?
           endl

        mov     esi, [hcursor]
        mov     ecx, [x]
        mov     eax, [y]

        xor     edx, edx
        sub     ecx, [esi+CURSOR.hot_x]
        lea     ebx, [ecx+32-1]
        mov     [x], ecx
        sets    dl
        dec     edx
        and     ecx, edx      ;clip x to 0<=x
        mov     [cur.left], ecx
        mov     edi, ecx
        sub     edi, [x]
        mov     [_dx], edi

        xor     edx, edx
        sub     eax, [esi+CURSOR.hot_y]
        lea     edi, [eax+32-1]
        mov     [y], eax
        sets    dl
        dec     edx
        and     eax, edx      ;clip y to 0<=y
        mov     [cur.top], eax
        mov     edx, eax
        sub     edx, [y]
        mov     [_dy], edx

;        mul     dword [BytesPerScanLine]
        mov     eax, [BPSLine_calc_area+eax*4]
        lea     edx, [LFB_BASE+eax+ecx*2]
        mov     [cur_saved_base], edx

        cmp     ebx, [_display.width]
        jb      @F
        mov     ebx, [_display.width]
;--------------------------------------
align 4
@@:
        cmp     edi, [_display.height]
        jb      @F
        mov     edi, [_display.height]
;--------------------------------------
align 4
@@:
        sub     ebx, [x]
        sub     edi, [y]
        sub     ebx, [_dx]
        sub     edi, [_dy]

        mov     [cur.w], ebx
        mov     [cur.h], edi
        mov     [h], edi

        mov     eax, edi
        mov     edi, cur_saved_data
;--------------------------------------
align 4
@@:
        mov     esi, edx
        add     edx, [_display.lfb_pitch]
        mov     ecx, [cur.w]

        rep movsw
        dec     eax
        jnz     @B

;draw cursor
        mov     ebx, [cur_saved_base]
        mov     eax, [_dy]
        shl     eax, 5
        add     eax, [_dx]

        mov     esi, [hcursor]
        mov     esi, [esi+CURSOR.base]
        lea     edx, [esi+eax*4]
;--------------------------------------
align 4
.row:
        mov     ecx, [cur.w]
        mov     esi, edx
        mov     edi, ebx
        add     edx, 32*4
        add     ebx, [_display.lfb_pitch]
;--------------------------------------
align 4
.pix:
        lodsd
        test    eax, 0xFF000000
        jz      @F
; convert to 16 bpp and store to real LFB
        and     eax, 00000000111110001111110011111000b
        shr     ah, 2
        shr     ax, 3
        ror     eax, 8
        add     al, ah
        rol     eax, 8
        mov     [edi], ax
;--------------------------------------
align 4
@@:
        add     edi, 2
        dec     ecx
        jnz     .pix

        dec     [h]
        jnz     .row
        ret
endp
;------------------------------------------------------------------------------
align 4
check_mouse_area_for_getpixel_new:
; in:
; eax = x
; ebx = y
; out:
; ecx = new color
;--------------------------------------
; check for Y
        cmp     bx, [Y_UNDER_subtraction_CUR_hot_y]
        jb      .no_mouse_area

        cmp     bx, [Y_UNDER_sub_CUR_hot_y_add_curh]
        jae     .no_mouse_area
;--------------------------------------
; check for X
        cmp     ax, [X_UNDER_subtraction_CUR_hot_x]
        jb      .no_mouse_area

        cmp     ax, [X_UNDER_sub_CUR_hot_x_add_curh]
        jae     .no_mouse_area
;--------------------------------------
        push    eax ebx
; offset X
        movzx   ecx, word [X_UNDER_subtraction_CUR_hot_x]
        sub     eax, ecx        ; x1
; offset Y
        movzx   ecx, word [Y_UNDER_subtraction_CUR_hot_y]
        sub     ebx, ecx        ; y1
;--------------------------------------
; ebx = offset y
; eax = offset x
        imul    ebx, [cur.w]     ;y
        add     eax, ebx
        mov     ebx, eax
        shl     eax, 2
        cmp     byte [_display.bits_per_pixel], 32
        je      @f
        sub     eax, ebx
        cmp     byte [_display.bits_per_pixel], 24
        je      @f
        sub     eax, ebx
        add     eax, cur_saved_data
        mov     ecx, [eax]
        shl     ecx, 3
        ror     ecx, 8
        shl     cx, 2
        ror     ecx, 8
        shl     cl, 3
        rol     ecx, 16
        or      ecx, 0xff000000
        pop     ebx eax
        ret

;--------------------------------------
align 4
@@:
        add     eax, cur_saved_data
        mov     ecx, [eax]
        or      ecx, 0xff000000
        pop     ebx eax
        ret
;--------------------------------------
align 4
.no_mouse_area:
        xor     ecx, ecx
        ret
;-----------------------------------------------------------------------------
align 4
check_mouse_area_for_putpixel_new:
; in:
; ecx = x shl 16 + y
; eax = color
; out:
; eax = new color
;--------------------------------------
; check for Y
        cmp     cx, [Y_UNDER_sub_CUR_hot_y_add_curh]
        jae     .no_mouse_area

        sub     cx, [Y_UNDER_subtraction_CUR_hot_y]
        jb      .no_mouse_area

        rol     ecx, 16
;--------------------------------------
; check for X
        cmp     cx, [X_UNDER_sub_CUR_hot_x_add_curh]
        jae     .no_mouse_area

        sub     cx, [X_UNDER_subtraction_CUR_hot_x]
        jb      .no_mouse_area

        ror     ecx, 16
;--------------------------------------
align 4
.1:
        push    eax
;--------------------------------------
; ecx = (offset x) shl 16 + (offset y)
        push    ebx
        mov     ebx, ecx
        shr     ebx, 16        ; x
        and     ecx, 0xffff    ; y

        cmp     ecx, [cur.h]
        jae     @f

        cmp     ebx, [cur.w]
        jb      .ok
;--------------------------------------
align 4
@@:
;        DEBUGF  1, "K : SHIT HAPPENS: %x %x \n", ecx,ebx
        pop     ebx
        jmp     .sh   ; SORRY! SHIT HAPPENS!
;--------------------------------------
align 4
.ok:
; ecx = offset y
; ebx = offset x
        push    ebx ecx
        imul    ecx, [cur.w]    ;y
        add     ecx, ebx
        mov     ebx, ecx
        shl     ecx, 2
        cmp     byte [_display.bits_per_pixel], 16
        je      .16
        cmp     byte [_display.bits_per_pixel], 24
        je      .24
        and     eax, 0xFFFFFF
        mov     [ecx + cur_saved_data], eax   ;store new color  to
        jmp     @f
;--------------------------------------
align 4
.16:
        sub     ecx, ebx
        sub     ecx, ebx
; convert to 16 bpp and store to real LFB
        and     eax, 00000000111110001111110011111000b
        shr     ah, 2
        shr     ax, 3
        ror     eax, 8
        add     al, ah
        rol     eax, 8
        mov     [ecx + cur_saved_data], ax      ;store new color  to
        jmp     @f
;--------------------------------------
align 4
.24:
        sub     ecx, ebx
        mov     [ecx + cur_saved_data], ax      ;store new color  to
        shr     eax, 16
        mov     [ecx + cur_saved_data + 2], al  ;store new color  to
;--------------------------------------
align 4
@@:
        pop     ecx ebx

        shl     ecx, 5
        add     ecx, ebx

        mov     eax, [current_cursor]
        mov     eax, [eax+CURSOR.base]
        lea     eax, [eax+ecx*4]
        mov     eax, [eax]

        pop     ebx

        test    eax, 0xFF000000
        jz      @f

        add     esp, 4
        ret
;--------------------------------------
align 4
.sh:
        mov     ecx, -1
;--------------------------------------
align 4
@@:
        pop     eax
;--------------------------------------
align 4
.no_mouse_area:
        ret
;------------------------------------------------------------------------------
align 4
get_display:
        mov     eax, _display
        ret
;------------------------------------------------------------------------------
align 4
init_display:
        xor     eax, eax
        mov     edi, _display

        mov     [edi+display_t.init_cursor], eax
        mov     [edi+display_t.select_cursor], eax
        mov     [edi+display_t.show_cursor], eax
        mov     [edi+display_t.move_cursor], eax
        mov     [edi+display_t.restore_cursor], eax

        lea     ecx, [edi+display_t.cr_list.next]
        mov     [edi+display_t.cr_list.next], ecx
        mov     [edi+display_t.cr_list.prev], ecx

        cmp     [SCR_MODE], word 0x13
        jbe     .fail

        test    word [SCR_MODE], 0x4000
        jz      .fail

        mov     ebx, restore_32
        mov     ecx, move_cursor_32
        mov     edx, Vesa20_putpixel32_new
        mov     eax, [_display.bits_per_pixel]
        cmp     al, 32
        jne     .not_32bpp

.set:
        mov     [_display.select_cursor], select_cursor
        mov     [_display.move_cursor], ecx
        mov     [_display.restore_cursor], ebx
        mov     [_display.check_mouse], check_mouse_area_for_putpixel_new
        mov     [_display.check_m_pixel], check_mouse_area_for_getpixel_new

        cmp     [PUTPIXEL], dword VGA_putpixel
        je      @f
        mov     [PUTPIXEL], edx
@@:
        stdcall load_cursor, clock_arrow, dword LOAD_FROM_MEM
        mov     [def_cursor_clock], eax
        stdcall load_cursor, def_arrow, dword LOAD_FROM_MEM
        mov     [def_cursor], eax
        ret

.not_32bpp:
        cmp     al, 24
        jne     .not_24bpp

        mov     ebx, restore_24
        mov     ecx, move_cursor_24
        mov     edx, Vesa20_putpixel24_new
        jmp     .set

.not_24bpp:
        cmp     al, 16
        jne     .not_16bpp
        mov     ebx, restore_16
        mov     ecx, move_cursor_16
        mov     edx, Vesa20_putpixel16_new
        jmp     .set

.not_16bpp:
;        cmp     al, 15
;        jne     .fail
;        mov     ebx, restore_15
;        mov     ecx, move_cursor_15
;        mov     edx, Vesa20_putpixel15_new
;        jmp     .set

.fail:
        xor     eax, eax
        mov     [_display.select_cursor], eax
        mov     [_display.move_cursor], eax
        ret
;------------------------------------------------------------------------------
align 4
def_arrow:
  file 'arrow.cur'
;------------------------------------------------------------------------------
align 4
clock_arrow:
  file 'arrow_clock.cur'
;------------------------------------------------------------------------------