forked from KolibriOS/kolibrios
[KERNEL] Add sysfn 39.3 - copy rect of background image to buffer.
Previously was only 39.2 that reads one pixel from background image. (39.2 is shomehow useless due to big context switching overhead if you trying to read some area of pixels using 39.2) git-svn-id: svn://kolibrios.org@9458 a494cfbc-eb01-0410-851d-a64ba20cac60
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@ -2023,6 +2023,24 @@ path db 'HD0/1',0
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* Есть парная функция установки точки на фоновом изображении -
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подфункция 2 функции 15.
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---------------------- Константы для регистров: ----------------------
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eax - SF_BACKGROUND_GET_RECT (39)
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======================================================================
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== Функция 39, подфункция 3 - получить прямоугольную область фона =
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======================================================================
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Параметры:
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* eax = 39 - номер функции
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* ebx = 3 - номер подфункции
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* ecx = [x]*65536 + [y]
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* edx = [width]*65536 + [height]
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* esi = адрес буфера
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Возвращаемое значение:
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* eax = 0 - успех
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* eax = -1 - ошибка
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Замечания:
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* Функция копирует указанную прямоугольную область в буфер в формате
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0x00RRGGBB
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---------------------- Константы для регистров: ----------------------
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eax - SF_BACKGROUND_GET (39)
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======================================================================
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@ -2004,6 +2004,24 @@ Remarks:
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* There is a pair function to set pixel on the background image -
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subfunction 2 of function 15.
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---------------------- Constants for registers: ----------------------
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eax - SF_BACKGROUND_GET_RECT (39)
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======================================================================
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== Function 39, subfunction 3 - get rect from the background image. =
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======================================================================
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Parameters:
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* eax = 39 - function number
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* ebx = 3 - subfunction number
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* ecx = [x]*65536 + [y]
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* edx = [width]*65536 + [height]
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* esi = buffer address
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Returned value:
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* eax = 0 - success
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* eax = -1 - error
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Remarks:
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* Function copies specified rectangle of background image to buffer
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in 0x00RRGGBB format
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---------------------- Constants for registers: ----------------------
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eax - SF_BACKGROUND_GET (39)
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======================================================================
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@ -3053,10 +3053,10 @@ force_redraw_background:
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ret
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;------------------------------------------------------------------------------
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align 4
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sys_getbackground:
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; cmp eax,1 ; SIZE
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sys_getbackground: ; sysfn 39
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dec ebx
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jnz nogb1
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jnz .nogb1
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; sysfn 39.1:
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mov eax, [BgrDataWidth]
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shl eax, 16
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mov ax, word [BgrDataHeight]
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@ -3064,17 +3064,15 @@ sys_getbackground:
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ret
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;------------------------------------------------------------------------------
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align 4
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nogb1:
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; cmp eax,2 ; PIXEL
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.nogb1:
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dec ebx
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jnz nogb2
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jnz .nogb2
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; sysfn 39.2:
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mov eax, [img_background]
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test ecx, ecx
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jz @f
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cmp eax, static_background_data
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jz .ret
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;--------------------------------------
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align 4
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@@:
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mov ebx, [mem_BACKGROUND]
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@ -3088,22 +3086,109 @@ align 4
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and eax, 0xFFFFFF
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mov [esp+32], eax
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;--------------------------------------
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align 4
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.ret:
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ret
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;------------------------------------------------------------------------------
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align 4
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nogb2:
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.x dd ?
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.y dd ?
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.w dd ?
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.h dd ?
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.subrect_startptr dd ?
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.subrect_bytes dd ?
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align 4
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.nogb2:
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dec ebx
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jnz .nogb3
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; sysfn 39.3 read background subrect to buffer
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; ecx - <x, y>
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; edx - <w, h>
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; esi - buffer of 0x00RRGGBB
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mov eax, [img_background]
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cmp eax, static_background_data
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jz .ret_39_3
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align 4
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@@:
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movzx eax, cx ; store y in eax
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mov [.y], eax
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; cmp eax,4 ; TILED / STRETCHED
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shr ecx, 16 ; ecx = x
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mov [.x], ecx
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imul eax, [BgrDataWidth]
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add eax, ecx
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imul eax, 3
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mov [.subrect_startptr], eax
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movzx eax, dx ; store h in eax
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mov [.h], eax
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shr edx, 16 ; edx = w
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mov [.w], edx
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imul eax, edx
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mov [.subrect_bytes], eax
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; check bounds
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mov ebx, [mem_BACKGROUND]
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add ebx, 4095
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and ebx, -4096
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sub ebx, 4
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add eax, [.subrect_startptr]
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cmp eax, ebx
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ja .fail_39_3
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; copy contents
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mov edi, [img_background]
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xor ecx, ecx ; ecx - row index
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.copy_rect:
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cmp ecx, [.h]
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jae .end_copy_rect
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xor edx, edx ; edx - column index
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.copy_row:
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cmp edx, [.w]
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jae .end_copy_row
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mov ebx, ecx
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imul ebx, [BgrDataWidth]
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add ebx, edx
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imul ebx, 3
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add ebx, [.subrect_startptr]
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mov eax, [edi + ebx]
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mov ebx, ecx
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imul ebx, [.w]
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add ebx, edx
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and eax, 0xFFFFFF
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mov [esi + ebx*4], eax
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inc edx
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jmp .copy_row
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.end_copy_row:
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inc ecx
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jmp .copy_rect
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.end_copy_rect:
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xor eax, eax
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mov [esp+32], eax
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;--------------------------------------
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align 4
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.fail_39_3:
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mov eax, -1
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align 4
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.ret_39_3:
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ret
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;--------------------------------------
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align 4
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.nogb3:
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dec ebx
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dec ebx
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jnz nogb4
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jnz .nogb4
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; sysfn 39.4:
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mov eax, [BgrDrawMode]
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;--------------------------------------
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align 4
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nogb4:
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.nogb4:
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mov [esp+32], eax
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ret
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;------------------------------------------------------------------------------
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