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/kernel/trunk/docs/sysfuncr.txt
2024,6 → 2024,24
подфункция 2 функции 15.
---------------------- Константы для регистров: ----------------------
eax - SF_BACKGROUND_GET_RECT (39)
======================================================================
== Функция 39, подфункция 3 - получить прямоугольную область фона =
======================================================================
Параметры:
* eax = 39 - номер функции
* ebx = 3 - номер подфункции
* ecx = [x]*65536 + [y]
* edx = [width]*65536 + [height]
* esi = адрес буфера
Возвращаемое значение:
* eax = 0 - успех
* eax = -1 - ошибка
Замечания:
* Функция копирует указанную прямоугольную область в буфер в формате
0x00RRGGBB
---------------------- Константы для регистров: ----------------------
eax - SF_BACKGROUND_GET (39)
======================================================================
====== Функция 39, подфункция 4 - получить режим отрисовки фона. =====

/kernel/trunk/docs/sysfuncs.txt
2005,6 → 2005,24
subfunction 2 of function 15.
---------------------- Constants for registers: ----------------------
eax - SF_BACKGROUND_GET_RECT (39)
======================================================================
== Function 39, subfunction 3 - get rect from the background image. =
======================================================================
Parameters:
* eax = 39 - function number
* ebx = 3 - subfunction number
* ecx = [x]*65536 + [y]
* edx = [width]*65536 + [height]
* esi = buffer address
Returned value:
* eax = 0 - success
* eax = -1 - error
Remarks:
* Function copies specified rectangle of background image to buffer
in 0x00RRGGBB format
---------------------- Constants for registers: ----------------------
eax - SF_BACKGROUND_GET (39)
======================================================================
== Function 39, subfunction 4 - get drawing mode for the background. =

/kernel/trunk/kernel.asm
3053,10 → 3053,10
ret
;------------------------------------------------------------------------------
align 4
sys_getbackground:
; cmp eax,1 ; SIZE
sys_getbackground: ; sysfn 39
dec ebx
jnz nogb1
jnz .nogb1
; sysfn 39.1:
mov eax, [BgrDataWidth]
shl eax, 16
mov ax, word [BgrDataHeight]
3064,17 → 3064,15
ret
;------------------------------------------------------------------------------
align 4
nogb1:
; cmp eax,2 ; PIXEL
.nogb1:
dec ebx
jnz nogb2
jnz .nogb2
; sysfn 39.2:
mov eax, [img_background]
test ecx, ecx
jz @f
cmp eax, static_background_data
jz .ret
;--------------------------------------
align 4
@@:
mov ebx, [mem_BACKGROUND]
3088,22 → 3086,109
and eax, 0xFFFFFF
mov [esp+32], eax
;--------------------------------------
align 4
.ret:
ret
;------------------------------------------------------------------------------
align 4
nogb2:
.x dd ?
.y dd ?
.w dd ?
.h dd ?
.subrect_startptr dd ?
.subrect_bytes dd ?
align 4
.nogb2:
dec ebx
jnz .nogb3
; sysfn 39.3 read background subrect to buffer
; ecx - <x, y>
; edx - <w, h>
; esi - buffer of 0x00RRGGBB
mov eax, [img_background]
cmp eax, static_background_data
jz .ret_39_3
align 4
@@:
movzx eax, cx ; store y in eax
mov [.y], eax
; cmp eax,4 ; TILED / STRETCHED
shr ecx, 16 ; ecx = x
mov [.x], ecx
imul eax, [BgrDataWidth]
add eax, ecx
imul eax, 3
mov [.subrect_startptr], eax
movzx eax, dx ; store h in eax
mov [.h], eax
shr edx, 16 ; edx = w
mov [.w], edx
imul eax, edx
mov [.subrect_bytes], eax
; check bounds
mov ebx, [mem_BACKGROUND]
add ebx, 4095
and ebx, -4096
sub ebx, 4
add eax, [.subrect_startptr]
cmp eax, ebx
ja .fail_39_3
; copy contents
mov edi, [img_background]
xor ecx, ecx ; ecx - row index
.copy_rect:
cmp ecx, [.h]
jae .end_copy_rect
xor edx, edx ; edx - column index
.copy_row:
cmp edx, [.w]
jae .end_copy_row
mov ebx, ecx
imul ebx, [BgrDataWidth]
add ebx, edx
imul ebx, 3
add ebx, [.subrect_startptr]
mov eax, [edi + ebx]
mov ebx, ecx
imul ebx, [.w]
add ebx, edx
and eax, 0xFFFFFF
mov [esi + ebx*4], eax
inc edx
jmp .copy_row
.end_copy_row:
inc ecx
jmp .copy_rect
.end_copy_rect:
xor eax, eax
mov [esp+32], eax
;--------------------------------------
align 4
.fail_39_3:
mov eax, -1
align 4
.ret_39_3:
ret
;--------------------------------------
align 4
.nogb3:
dec ebx
dec ebx
jnz nogb4
jnz .nogb4
; sysfn 39.4:
mov eax, [BgrDrawMode]
;--------------------------------------
align 4
nogb4:
.nogb4:
mov [esp+32], eax
ret
;------------------------------------------------------------------------------