1075 lines
29 KiB
PHP
1075 lines
29 KiB
PHP
$Revision$
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; VESA20.INC ;;
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;; ;;
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;; Vesa 2.0 functions for MenuetOS ;;
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;; ;;
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;; Copyright 2002 Ville Turjanmaa ;;
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;; Alexey, kgaz@crosswindws.net ;;
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;; - Voodoo compatible graphics ;;
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;; Juan M. Caravaca ;;
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;; - Graphics optimimizations eg. drawline ;;
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;; ;;
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;; See file COPYING for details ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; If you're planning to write your own video driver I suggest
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; you replace the VESA12.INC file and see those instructions.
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;ScreenWidth equ 0xfe00
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;ScreenHeight equ 0xfe04
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;BytesPerScanLine equ 0xfe08
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;LFBAddress equ 0xfe80
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;ScreenBPP equ 0xfbf1
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;WinMapAddress equ 0x460000
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;*************************************************
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; getpixel
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;
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; in:
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; eax = x coordinate
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; ebx = y coordinate
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;
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; ret:
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; ecx = 00 RR GG BB
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getpixel:
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push eax ebx edx edi
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call dword [GETPIXEL]
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pop edi edx ebx eax
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ret
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Vesa20_getpixel24:
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; eax = x
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; ebx = y
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imul ebx, [BytesPerScanLine] ; ebx = y * y multiplier
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lea edi, [eax+eax*2] ; edi = x*3
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add edi, ebx ; edi = x*3+(y*y multiplier)
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add edi, [LFBAddress] ; ebx = where pixel is in memory
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mov ecx, [edi]
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and ecx, 0xffffff
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ret
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Vesa20_getpixel32:
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imul ebx, [BytesPerScanLine] ; ebx = y * y multiplier
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lea edi, [ebx+eax*4] ; edi = x*4+(y*y multiplier)
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add edi, [LFBAddress] ; ebx = where pixel is in memory
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mov ecx, [edi]
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and ecx, 0xffffff
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ret
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;*************************************************
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virtual at esp
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putimg:
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.real_sx dd ?
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.real_sy dd ?
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.image_sx dd ?
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.image_sy dd ?
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.image_cx dd ?
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.image_cy dd ?
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.pti dd ?
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.abs_cx dd ?
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.abs_cy dd ?
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.line_increment dd ?
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.winmap_newline dd ?
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.screen_newline dd ?
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.stack_data = 4*12
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.edi dd ?
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.esi dd ?
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.ebp dd ?
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.esp dd ?
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.ebx dd ?
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.edx dd ?
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.ecx dd ?
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.eax dd ?
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.ret_addr dd ?
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.arg_0 dd ?
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end virtual
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align 16
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; ebx = pointer
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; ecx = size [x|y]
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; edx = coordinates [x|y]
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; ebp = pointer to 'get' function
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; esi = pointer to 'init' function
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; edi = parameter for 'get' function
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vesa20_putimage:
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pushad
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call [disable_mouse]
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sub esp, putimg.stack_data
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; save pointer to image
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mov [putimg.pti], ebx
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; unpack the size
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mov eax, ecx
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and ecx, 0xFFFF
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shr eax, 16
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mov [putimg.image_sx], eax
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mov [putimg.image_sy], ecx
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; unpack the coordinates
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mov eax, edx
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and edx, 0xFFFF
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shr eax, 16
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mov [putimg.image_cx], eax
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mov [putimg.image_cy], edx
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; calculate absolute (i.e. screen) coordinates
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mov eax, [TASK_BASE]
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mov ebx, [eax-twdw + WDATA.box.left]
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add ebx, [putimg.image_cx]
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mov [putimg.abs_cx], ebx
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mov ebx, [eax-twdw + WDATA.box.top]
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add ebx, [putimg.image_cy]
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mov [putimg.abs_cy], ebx
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; real_sx = MIN(wnd_sx-image_cx, image_sx);
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mov ebx, [eax-twdw + WDATA.box.width] ; ebx = wnd_sx
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; \begin{diamond}[20.08.2006]
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; note that WDATA.box.width is one pixel less than real window x-size
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inc ebx
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; \end{diamond}[20.08.2006]
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sub ebx, [putimg.image_cx]
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ja @f
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add esp, putimg.stack_data
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popad
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ret
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@@:
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cmp ebx, [putimg.image_sx]
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jbe .end_x
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mov ebx, [putimg.image_sx]
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.end_x:
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mov [putimg.real_sx], ebx
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; init real_sy
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mov ebx, [eax-twdw + WDATA.box.height] ; ebx = wnd_sy
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; \begin{diamond}[20.08.2006]
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inc ebx
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; \end{diamond}[20.08.2006]
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sub ebx, [putimg.image_cy]
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ja @f
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add esp, putimg.stack_data
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popad
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ret
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@@:
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cmp ebx, [putimg.image_sy]
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jbe .end_y
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mov ebx, [putimg.image_sy]
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.end_y:
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mov [putimg.real_sy], ebx
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; line increment
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mov eax, [putimg.image_sx]
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sub eax, [putimg.real_sx]
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;; imul eax, [putimg.source_bpp]
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; lea eax, [eax + eax * 2]
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call esi
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add eax, [putimg.arg_0]
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mov [putimg.line_increment], eax
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; winmap new line increment
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mov eax, [ScreenWidth]
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inc eax
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sub eax, [putimg.real_sx]
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mov [putimg.winmap_newline], eax
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; screen new line increment
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mov eax, [BytesPerScanLine]
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mov ecx, [putimg.real_sx]
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movzx ebx, byte [ScreenBPP]
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shr ebx, 3
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imul ecx, ebx
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sub eax, ecx
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mov [putimg.screen_newline], eax
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; pointer to image
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mov esi, [putimg.pti]
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; pointer to screen
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mov edx, [putimg.abs_cy]
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imul edx, [BytesPerScanLine]
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mov eax, [putimg.abs_cx]
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movzx ebx, byte [ScreenBPP]
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shr ebx, 3
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imul eax, ebx
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add edx, eax
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add edx, [LFBAddress]
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; pointer to pixel map
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mov eax, [putimg.abs_cy]
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imul eax, [ScreenWidth]
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add eax, [putimg.abs_cy]
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add eax, [putimg.abs_cx]
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add eax, WinMapAddress
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xchg eax, ebp
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; get process number
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mov ebx, [CURRENT_TASK]
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cmp byte [ScreenBPP], 32
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je put_image_end_32
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;put_image_end_24:
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mov edi, [putimg.real_sy]
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align 4
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.new_line:
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mov ecx, [putimg.real_sx]
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; push ebp edx
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align 4
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.new_x:
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push [putimg.edi]
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mov eax, [putimg.ebp+4]
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call eax
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cmp [ebp], bl
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jne .skip
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; mov eax, [esi] ; eax = RRBBGGRR
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mov [edx], ax
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shr eax, 16
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mov [edx+2], al
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.skip:
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; add esi, 3 ;[putimg.source_bpp]
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add edx, 3
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inc ebp
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dec ecx
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jnz .new_x
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; pop edx ebp
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add esi, [putimg.line_increment]
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add edx, [putimg.screen_newline] ;[BytesPerScanLine]
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add ebp, [putimg.winmap_newline] ;[ScreenWidth]
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; inc ebp
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dec edi
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jnz .new_line
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.finish:
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add esp, putimg.stack_data
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popad
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ret
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put_image_end_32:
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mov edi, [putimg.real_sy]
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align 4
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.new_line:
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mov ecx, [putimg.real_sx]
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; push ebp edx
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align 4
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.new_x:
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push [putimg.edi]
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mov eax, [putimg.ebp+4]
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call eax
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cmp [ebp], bl
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jne .skip
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; mov eax, [esi] ; ecx = RRBBGGRR
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mov [edx], eax
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.skip:
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; add esi, [putimg.source_bpp]
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add edx, 4
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inc ebp
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dec ecx
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jnz .new_x
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; pop edx ebp
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add esi, [putimg.line_increment]
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add edx, [putimg.screen_newline] ;[BytesPerScanLine]
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add ebp, [putimg.winmap_newline] ;[ScreenWidth]
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; inc ebp
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dec edi
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jnz .new_line
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.finish:
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add esp, putimg.stack_data
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popad
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call VGA__putimage
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mov [EGA_counter],1
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ret
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;*************************************************
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align 4
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__sys_putpixel:
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; eax = x coordinate
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; ebx = y coordinate
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; ecx = ?? RR GG BB ; 0x01000000 negation
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; edi = 0x00000001 force
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;;; mov [novesachecksum], dword 0
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pushad
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test edi,1 ; force ?
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jnz .forced
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; not forced:
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push ecx ; save 24th bit in case negative pixel wanted
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call checkpixel
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test ecx,ecx
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pop ecx
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jnz .exit
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.forced:
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cmp [ScreenWidth], eax
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jb .exit
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cmp [ScreenHeight], ebx
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jb .exit
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.ok:
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; check if negation
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test ecx,0x01000000
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jz .noneg
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call getpixel
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not ecx
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mov [esp+32-8],ecx
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.noneg:
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; OK to set pixel
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call dword [PUTPIXEL] ; call the real put_pixel function
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.exit:
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popad
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ret
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align 4
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Vesa20_putpixel24:
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; eax = x
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; ebx = y
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imul ebx, [BytesPerScanLine] ; ebx = y * y multiplier
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lea edi, [eax+eax*2] ; edi = x*3
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mov eax, [esp+32-8+4]
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add edi, [LFBAddress]
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add edi, ebx ; ebx = where to put pixel in memory
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mov [edi], ax
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shr eax, 16
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mov [edi+2], al
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ret
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align 4
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Vesa20_putpixel32:
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; eax = x
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; ebx = y
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imul ebx, [BytesPerScanLine] ; ebx = y * y multiplier
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lea edi, [ebx+eax*4] ; edi = x*4+(y*y multiplier)
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mov eax, [esp+32-8+4] ; eax = color
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add edi, [LFBAddress] ; ebx = where to put pixel in memory
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mov [edi], eax
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ret
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;*************************************************
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;align 4
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calculate_edi:
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mov edi, ebx
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imul edi, [ScreenWidth]
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add edi, ebx
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add edi, eax
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ret
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;*************************************************
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; DRAWLINE
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align 4
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__sys_draw_line:
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; inc [mouse_pause]
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call [disable_mouse]
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; draw a line
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; eax = HIWORD = x1
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; LOWORD = x2
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; ebx = HIWORD = y1
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; LOWORD = y2
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; ecx = color
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; edi = force ?
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pusha
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dl_x1 equ esp+20
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dl_y1 equ esp+16
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dl_x2 equ esp+12
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dl_y2 equ esp+8
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dl_dx equ esp+4
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dl_dy equ esp+0
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xor edx, edx ; clear edx
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xor esi, esi ; unpack arguments
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xor ebp, ebp
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mov si, ax ; esi = x2
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mov bp, bx ; ebp = y2
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shr eax, 16 ; eax = x1
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shr ebx, 16 ; ebx = y1
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push eax ; save x1
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push ebx ; save y1
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push esi ; save x2
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push ebp ; save y2
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; checking x-axis...
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sub esi, eax ; esi = x2-x1
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push esi ; save y2-y1
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jl .x2lx1 ; is x2 less than x1 ?
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jg .no_vline ; x1 > x2 ?
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mov edx, ebp ; else (if x1=x2)
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call vline
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push edx ; necessary to rightly restore stack frame at .exit
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jmp .exit
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.x2lx1:
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neg esi ; get esi absolute value
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.no_vline:
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; checking y-axis...
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sub ebp, ebx ; ebp = y2-y1
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push ebp ; save y2-y1
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jl .y2ly1 ; is y2 less than y1 ?
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jg .no_hline ; y1 > y2 ?
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mov edx, [dl_x2] ; else (if y1=y2)
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call hline
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jmp .exit
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.y2ly1:
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neg ebp ; get ebp absolute value
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.no_hline:
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cmp ebp, esi
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jle .x_rules ; |y2-y1| < |x2-x1| ?
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cmp [dl_y2], ebx ; make sure y1 is at the begining
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jge .no_reverse1
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neg dword [dl_dx]
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mov edx, [dl_x2]
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mov [dl_x2], eax
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mov [dl_x1], edx
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mov edx, [dl_y2]
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mov [dl_y2], ebx
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mov [dl_y1], edx
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.no_reverse1:
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mov eax, [dl_dx]
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cdq ; extend eax sing to edx
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shl eax, 16 ; using 16bit fix-point maths
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idiv ebp ; eax = ((x2-x1)*65536)/(y2-y1)
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mov edx, ebp ; edx = counter (number of pixels to draw)
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mov ebp, 1 *65536 ; <<16 ; ebp = dy = 1.0
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mov esi, eax ; esi = dx
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jmp .y_rules
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.x_rules:
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cmp [dl_x2], eax ; make sure x1 is at the begining
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jge .no_reverse2
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neg dword [dl_dy]
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mov edx, [dl_x2]
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mov [dl_x2], eax
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mov [dl_x1], edx
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mov edx, [dl_y2]
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mov [dl_y2], ebx
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mov [dl_y1], edx
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.no_reverse2:
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xor edx, edx
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mov eax, [dl_dy]
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cdq ; extend eax sing to edx
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shl eax, 16 ; using 16bit fix-point maths
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idiv esi ; eax = ((y2-y1)*65536)/(x2-x1)
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mov edx, esi ; edx = counter (number of pixels to draw)
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mov esi, 1 *65536 ;<< 16 ; esi = dx = 1.0
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mov ebp, eax ; ebp = dy
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.y_rules:
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mov eax, [dl_x1]
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mov ebx, [dl_y1]
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shl eax, 16
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shl ebx, 16
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align 4
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.draw:
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push eax ebx
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shr eax, 16
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shr ebx, 16
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call [putpixel]
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pop ebx eax
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add ebx, ebp ; y = y+dy
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add eax, esi ; x = x+dx
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dec edx
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jnz .draw
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; force last drawn pixel to be at (x2,y2)
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mov eax, [dl_x2]
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mov ebx, [dl_y2]
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call [putpixel]
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.exit:
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add esp, 6*4
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popa
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; dec [mouse_pause]
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call [draw_pointer]
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ret
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hline:
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; draw an horizontal line
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; eax = x1
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; edx = x2
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; ebx = y
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; ecx = color
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; edi = force ?
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push eax edx
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cmp edx, eax ; make sure x2 is above x1
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jge @f
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xchg eax, edx
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align 4
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@@:
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call [putpixel]
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inc eax
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cmp eax, edx
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jle @b
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pop edx eax
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ret
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vline:
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; draw a vertical line
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; eax = x
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; ebx = y1
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; edx = y2
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; ecx = color
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; edi = force ?
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push ebx edx
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cmp edx, ebx ; make sure y2 is above y1
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jge @f
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xchg ebx, edx
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align 4
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@@:
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call [putpixel]
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inc ebx
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cmp ebx, edx
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jle @b
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pop edx ebx
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ret
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;*************************************************
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virtual at esp
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drbar:
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.bar_sx dd ?
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.bar_sy dd ?
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.bar_cx dd ?
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.bar_cy dd ?
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.abs_cx dd ?
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.abs_cy dd ?
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.real_sx dd ?
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.real_sy dd ?
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.color dd ?
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.line_inc_scr dd ?
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.line_inc_map dd ?
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.stack_data = 4*11
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end virtual
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align 4
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; eax cx
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|
; ebx cy
|
|
; ecx xe
|
|
; edx ye
|
|
; edi color
|
|
vesa20_drawbar:
|
|
pushad
|
|
call [disable_mouse]
|
|
sub esp, drbar.stack_data
|
|
mov [drbar.color], edi
|
|
sub edx, ebx
|
|
jle .exit ;// mike.dld, 2005-01-29
|
|
sub ecx, eax
|
|
jle .exit ;// mike.dld, 2005-01-29
|
|
mov [drbar.bar_sy], edx
|
|
mov [drbar.bar_sx], ecx
|
|
mov [drbar.bar_cx], eax
|
|
mov [drbar.bar_cy], ebx
|
|
mov edi, [TASK_BASE]
|
|
add eax, [edi-twdw + WDATA.box.left] ; win_cx
|
|
add ebx, [edi-twdw + WDATA.box.top] ; win_cy
|
|
mov [drbar.abs_cx], eax
|
|
mov [drbar.abs_cy], ebx
|
|
; real_sx = MIN(wnd_sx-bar_cx, bar_sx);
|
|
mov ebx, [edi-twdw + WDATA.box.width] ; ebx = wnd_sx
|
|
; \begin{diamond}[20.08.2006]
|
|
; note that WDATA.box.width is one pixel less than real window x-size
|
|
inc ebx
|
|
; \end{diamond}[20.08.2006]
|
|
sub ebx, [drbar.bar_cx]
|
|
ja @f
|
|
.exit: ;// mike.dld, 2005-01-29
|
|
add esp, drbar.stack_data
|
|
popad
|
|
xor eax, eax
|
|
inc eax
|
|
ret
|
|
@@:
|
|
cmp ebx, [drbar.bar_sx]
|
|
jbe .end_x
|
|
mov ebx, [drbar.bar_sx]
|
|
.end_x:
|
|
mov [drbar.real_sx], ebx
|
|
; real_sy = MIN(wnd_sy-bar_cy, bar_sy);
|
|
mov ebx, [edi-twdw + WDATA.box.height] ; ebx = wnd_sy
|
|
; \begin{diamond}[20.08.2006]
|
|
inc ebx
|
|
; \end{diamond}
|
|
sub ebx, [drbar.bar_cy]
|
|
ja @f
|
|
add esp, drbar.stack_data
|
|
popad
|
|
xor eax, eax
|
|
inc eax
|
|
ret
|
|
@@:
|
|
cmp ebx, [drbar.bar_sy]
|
|
jbe .end_y
|
|
mov ebx, [drbar.bar_sy]
|
|
.end_y:
|
|
mov [drbar.real_sy], ebx
|
|
; line_inc_map
|
|
mov eax, [ScreenWidth]
|
|
sub eax, [drbar.real_sx]
|
|
inc eax
|
|
mov [drbar.line_inc_map], eax
|
|
; line_inc_scr
|
|
mov eax, [drbar.real_sx]
|
|
movzx ebx, byte [ScreenBPP]
|
|
shr ebx, 3
|
|
imul eax, ebx
|
|
neg eax
|
|
add eax, [BytesPerScanLine]
|
|
mov [drbar.line_inc_scr], eax
|
|
; pointer to screen
|
|
mov edx, [drbar.abs_cy]
|
|
imul edx, [BytesPerScanLine]
|
|
mov eax, [drbar.abs_cx]
|
|
; movzx ebx, byte [ScreenBPP]
|
|
; shr ebx, 3
|
|
imul eax, ebx
|
|
add edx, eax
|
|
add edx, [LFBAddress]
|
|
; pointer to pixel map
|
|
mov eax, [drbar.abs_cy]
|
|
imul eax, [ScreenWidth]
|
|
add eax, [drbar.abs_cy]
|
|
add eax, [drbar.abs_cx]
|
|
add eax, WinMapAddress
|
|
xchg eax, ebp
|
|
; get process number
|
|
mov ebx, [CURRENT_TASK]
|
|
cmp byte [ScreenBPP], 24
|
|
jne draw_bar_end_32
|
|
draw_bar_end_24:
|
|
mov eax, [drbar.color] ;; BBGGRR00
|
|
mov bh, al ;; bh = BB
|
|
shr eax, 8 ;; eax = RRGG
|
|
; eax - color high RRGG
|
|
; bl - process num
|
|
; bh - color low BB
|
|
; ecx - temp
|
|
; edx - pointer to screen
|
|
; esi - counter
|
|
; edi - counter
|
|
mov esi, [drbar.real_sy]
|
|
align 4
|
|
.new_y:
|
|
mov edi, [drbar.real_sx]
|
|
align 4
|
|
.new_x:
|
|
cmp byte [ebp], bl
|
|
jne .skip
|
|
mov [edx], bh
|
|
mov [edx + 1], ax
|
|
.skip:
|
|
; add pixel
|
|
add edx, 3
|
|
inc ebp
|
|
dec edi
|
|
jnz .new_x
|
|
; add line
|
|
add edx, [drbar.line_inc_scr]
|
|
add ebp, [drbar.line_inc_map]
|
|
; <Ivan 15.10.04> drawing gradient bars
|
|
test eax, 0x00800000
|
|
jz @f
|
|
test bh, bh
|
|
jz @f
|
|
dec bh
|
|
@@:
|
|
; </Ivan 15.10.04>
|
|
dec esi
|
|
jnz .new_y
|
|
add esp, drbar.stack_data
|
|
popad
|
|
xor eax, eax
|
|
ret
|
|
|
|
draw_bar_end_32:
|
|
mov eax, [drbar.color] ;; BBGGRR00
|
|
mov esi, [drbar.real_sy]
|
|
align 4
|
|
.new_y:
|
|
mov edi, [drbar.real_sx]
|
|
align 4
|
|
.new_x:
|
|
cmp byte [ebp], bl
|
|
jne .skip
|
|
mov [edx], eax
|
|
.skip:
|
|
; add pixel
|
|
add edx, 4
|
|
inc ebp
|
|
dec edi
|
|
jnz .new_x
|
|
; add line
|
|
add edx, [drbar.line_inc_scr]
|
|
add ebp, [drbar.line_inc_map]
|
|
; <Ivan 15.10.04> drawing gradient bars
|
|
test eax, 0x80000000
|
|
jz @f
|
|
test al, al
|
|
jz @f
|
|
dec al
|
|
@@:
|
|
; </Ivan 15.10.04>
|
|
dec esi
|
|
jnz .new_y
|
|
add esp, drbar.stack_data
|
|
popad
|
|
call VGA_draw_bar
|
|
xor eax, eax
|
|
mov [EGA_counter],1
|
|
ret
|
|
|
|
;voodoodbcplimit:
|
|
|
|
; ebp:=(y+Ywin)*(ScreenXSize+1)+(x+Xwin)+AddrBuffer
|
|
|
|
|
|
; pusha
|
|
|
|
; xor edx,edx
|
|
; mov eax,ebp
|
|
; mov ebx,[ScreenWidth] ; Screen_X_size
|
|
; inc ebx ; +1
|
|
; sub eax,WinMapAddress ; -AddrBuffer
|
|
; div ebx ;
|
|
; mov ebx,eax ; ebx:=Y
|
|
; mov eax,edx ; eax:=X
|
|
; call cplimit
|
|
|
|
; test ecx,ecx
|
|
; jne dbcpl12
|
|
; popa
|
|
; clc
|
|
; ret
|
|
; dbcpl12:
|
|
; popa
|
|
; stc
|
|
; ret
|
|
|
|
|
|
|
|
|
|
;dbcplimit:
|
|
|
|
; pusha
|
|
|
|
; xor edx,edx
|
|
; mov ebx,[ScreenWidth]
|
|
; inc ebx
|
|
; sub eax,WinMapAddress
|
|
; div ebx
|
|
; mov ebx,eax
|
|
; mov eax,edx
|
|
; call cplimit
|
|
|
|
; test ecx,ecx
|
|
; jne dbcpl1
|
|
; popa
|
|
; clc
|
|
; ret
|
|
; dbcpl1:
|
|
; popa
|
|
; stc
|
|
; ret
|
|
|
|
|
|
vesa20_drawbackground_tiled:
|
|
call [disable_mouse]
|
|
pushad
|
|
; External loop for all y from start to end
|
|
mov ebx, [draw_data+32+RECT.top] ; y start
|
|
dp2:
|
|
mov ebp, [draw_data+32+RECT.left] ; x start
|
|
; 1) Calculate pointers in WinMapAddress (does pixel belong to OS thread?) [ebp]
|
|
; and LFB data (output for our function) [edi]
|
|
mov eax, [BytesPerScanLine]
|
|
mul ebx
|
|
xchg ebp, eax
|
|
add ebp, eax
|
|
add ebp, eax
|
|
add ebp, eax
|
|
cmp [ScreenBPP], byte 24 ; 24 or 32 bpp ? - x size
|
|
jz @f
|
|
add ebp, eax
|
|
@@:
|
|
add ebp, [LFBAddress]
|
|
; ebp:=Y*BytesPerScanLine+X*BytesPerPixel+AddrLFB
|
|
call calculate_edi
|
|
xchg edi, ebp
|
|
; Now eax=x, ebx=y, edi->output, ebp=offset in WinMapAddress
|
|
; 2) Calculate offset in background memory block
|
|
push eax
|
|
xor edx, edx
|
|
mov eax, ebx
|
|
mov ecx, [BgrDataHeight]
|
|
div ecx ; edx := y mod BgrDataHeight
|
|
sub ecx, edx ; ecx := BgrDataHeight - (y mod BgrDataHeight)
|
|
pop eax
|
|
push eax
|
|
mov esi, edx
|
|
imul esi, [BgrDataWidth] ; esi := (y mod BgrDataHeight) * BgrDataWidth
|
|
xor edx, edx
|
|
div dword [BgrDataWidth] ; edx := x mod BgrDataWidth
|
|
add esi, edx ; esi := (y mod BgrDataHeight)*BgrDataWidth + (x mod BgrDataWidth)
|
|
pop eax
|
|
lea esi, [esi*3]
|
|
add esi, [img_background]
|
|
xor edx, edx
|
|
inc edx
|
|
; 3) Loop through redraw rectangle and copy background data
|
|
; Registers meaning:
|
|
; eax = x, ebx = y (screen coordinates)
|
|
; ecx = deltax - number of pixels left in current tile block
|
|
; edx = 1
|
|
; esi -> bgr memory, edi -> output
|
|
; ebp = offset in WinMapAddress
|
|
dp3:
|
|
cmp [ebp+WinMapAddress], dl
|
|
jnz nbgp
|
|
movsb
|
|
movsb
|
|
movsb
|
|
jmp @f
|
|
nbgp:
|
|
add esi, 3
|
|
add edi, 3
|
|
@@:
|
|
cmp [ScreenBPP], byte 25 ; 24 or 32 bpp?
|
|
sbb edi, -1 ; +1 for 32 bpp
|
|
; I do not use 'inc eax' because this is slightly slower then 'add eax,1'
|
|
add ebp, edx
|
|
add eax, edx
|
|
cmp eax, [draw_data+32+RECT.right]
|
|
ja dp4
|
|
sub ecx, edx
|
|
jnz dp3
|
|
; next tile block on x-axis
|
|
mov ecx, [BgrDataWidth]
|
|
sub esi, ecx
|
|
sub esi, ecx
|
|
sub esi, ecx
|
|
jmp dp3
|
|
dp4:
|
|
; next scan line
|
|
inc ebx
|
|
cmp ebx, [draw_data+32+RECT.bottom]
|
|
jbe dp2
|
|
popad
|
|
mov [EGA_counter], 1
|
|
call VGA_drawbackground
|
|
ret
|
|
|
|
; ----------
|
|
|
|
|
|
vesa20_drawbackground_stretch:
|
|
call [disable_mouse]
|
|
pushad
|
|
; Helper variables
|
|
mov eax, [BgrDataWidth]
|
|
xor edx, edx
|
|
mov ecx, [ScreenWidth]
|
|
inc ecx
|
|
div ecx
|
|
push eax ; quo
|
|
push edx ; rem
|
|
mov eax, [BgrDataHeight]
|
|
xor edx, edx
|
|
mov ecx, [ScreenHeight]
|
|
inc ecx
|
|
div ecx
|
|
push eax
|
|
push edx
|
|
; External loop for all y from start to end
|
|
mov ebx, [draw_data+32+RECT.top] ; y start
|
|
mov ebp, [draw_data+32+RECT.left] ; x start
|
|
; 1) Calculate pointers in WinMapAddress (does pixel belong to OS thread?) [ebp]
|
|
; and LFB data (output for our function) [edi]
|
|
mov eax, [BytesPerScanLine]
|
|
mul ebx
|
|
xchg ebp, eax
|
|
add ebp, eax
|
|
add ebp, eax
|
|
add ebp, eax
|
|
cmp [ScreenBPP], byte 24 ; 24 or 32 bpp ? - x size
|
|
jz @f
|
|
add ebp, eax
|
|
@@:
|
|
add ebp, [LFBAddress]
|
|
; ebp:=Y*BytesPerScanLine+X*BytesPerPixel+AddrLFB
|
|
call calculate_edi
|
|
xchg edi, ebp
|
|
; Now eax=x, ebx=y, edi->output, ebp=offset in WinMapAddress
|
|
push ebx
|
|
; 2) Calculate offset in background memory block
|
|
push eax
|
|
mov eax, ebx
|
|
mul dword [BgrDataHeight]
|
|
mov ecx, [ScreenHeight]
|
|
inc ecx
|
|
div ecx ; eax := y * BgrDataHeight / ScreenHeight
|
|
; edx := (y * BgrDataHeight) mod ScreenHeight
|
|
mov esi, eax
|
|
pop eax
|
|
push edx ; dword [esp] = (y * BgrDataHeight) mod ScreenHeight
|
|
; dword [esp+4] = y * BgrDataHeight / ScreenHeight
|
|
push eax
|
|
mov ecx, [BgrDataWidth]
|
|
lea edx, [ecx*3]
|
|
imul edx, [BgrDataHeight]
|
|
add edx, [img_background]
|
|
push edx
|
|
mul ecx
|
|
imul esi, ecx
|
|
dec ecx
|
|
push ecx
|
|
mov ecx, [ScreenWidth]
|
|
inc ecx
|
|
div ecx ; eax := x * BgrDataWidth / ScreenWidth
|
|
; edx := (x * BgrDataWidth) mod ScreenWidth
|
|
add esi, eax
|
|
lea esi, [esi*3]
|
|
add esi, [img_background]
|
|
push ecx edx esi
|
|
; 3) Loop through redraw rectangle and copy background data
|
|
; Registers meaning:
|
|
; ecx = (x * BgrDataWidth) / ScreenWidth
|
|
; edx = (x * BgrDataWidth) mod ScreenWidth (used to fast recalculating of ecx,esi)
|
|
; esi -> bgr memory, edi -> output
|
|
; ebp = offset in WinMapAddress
|
|
; dword [esp] = saved esi
|
|
; dword [esp+4] = saved edx
|
|
; dword [esp+8] = saved ecx
|
|
; dword [esp+12] = BgrDataWidth-1, x-limit for overlapping of points
|
|
; dword [esp+16] = end of bgr memory (defines y-limit for overlapping of points)
|
|
; dword [esp+20] = x
|
|
; dword [esp+24] = (y * BgrDataHeight) mod ScreenHeight (used to fast recalculating of esi)
|
|
; dword [esp+28] = y
|
|
; precalculated constants:
|
|
; dword [esp+32] = BgrDataHeight mod ScreenHeight
|
|
; dword [esp+36] = BgrDataHeight div ScreenHeight
|
|
; dword [esp+40] = BgrDataWidth mod ScreenWidth
|
|
; dword [esp+44] = BgrDataWidth div ScreenWidth
|
|
sdp3:
|
|
add edx, [esp+40]
|
|
cmp [ebp+WinMapAddress], byte 1
|
|
jnz snbgp
|
|
mov al, [esi+2]
|
|
shl eax, 16
|
|
mov ax, [esi]
|
|
cmp ecx, [esp+12]
|
|
jae @f
|
|
cmp edx, [ScreenWidth]
|
|
jb @f
|
|
mov ebx, [esi+2]
|
|
shr ebx, 8
|
|
call overlapping_of_points
|
|
@@:
|
|
mov ebx, [esp+24]
|
|
add ebx, [esp+32]
|
|
cmp ebx, [ScreenHeight]
|
|
jbe @f
|
|
mov ebx, [BgrDataWidth]
|
|
lea ebx, [ebx*3]
|
|
add ebx, esi
|
|
cmp ebx, [esp+16]
|
|
jae @f
|
|
mov ebx, [ebx-1]
|
|
shr ebx, 8
|
|
call overlapping_of_points
|
|
@@:
|
|
mov [edi], ax
|
|
shr eax, 16
|
|
mov [edi+2], al
|
|
snbgp:
|
|
cmp [ScreenBPP], byte 25
|
|
sbb edi, -4
|
|
add ebp, 1
|
|
mov eax, [esp+20]
|
|
add eax, 1
|
|
mov [esp+20], eax
|
|
cmp eax, [draw_data+32+RECT.right]
|
|
ja sdp4
|
|
mov eax, [esp+44]
|
|
add ecx, eax
|
|
lea eax, [eax*3]
|
|
add esi, eax
|
|
; add edx, [esp+40]
|
|
cmp edx, [ScreenWidth]
|
|
jbe sdp3
|
|
sub edx, [ScreenWidth]
|
|
add ecx, 1
|
|
add esi, 3
|
|
sub edx, 1
|
|
jmp sdp3
|
|
sdp4:
|
|
; next y
|
|
mov ebx, [esp+28]
|
|
add ebx, 1
|
|
mov [esp+28], ebx
|
|
cmp ebx, [draw_data+32+RECT.bottom]
|
|
ja sdpdone
|
|
; advance edi, ebp to next scan line
|
|
sub eax, [draw_data+32+RECT.left]
|
|
sub ebp, eax
|
|
add ebp, [ScreenWidth]
|
|
add ebp, 1
|
|
sub edi, eax
|
|
sub edi, eax
|
|
sub edi, eax
|
|
cmp [ScreenBPP], byte 24
|
|
jz @f
|
|
sub edi, eax
|
|
@@:
|
|
add edi, [BytesPerScanLine]
|
|
; restore ecx,edx; advance esi to next background line
|
|
pop esi edx ecx
|
|
push ecx edx
|
|
xor ebx, ebx
|
|
mov eax, [esp+24-4]
|
|
add eax, [esp+32-4]
|
|
cmp eax, [ScreenHeight]
|
|
jbe @f
|
|
sub eax, [ScreenHeight]
|
|
mov ebx, 1
|
|
sub eax, ebx
|
|
@@:
|
|
mov [esp+24-4], eax
|
|
add ebx, [esp+36-4]
|
|
lea ebx, [ebx*3]
|
|
imul ebx, [BgrDataWidth]
|
|
add esi, ebx
|
|
push esi
|
|
mov eax, [draw_data+32+RECT.left]
|
|
mov [esp+20], eax
|
|
jmp sdp3
|
|
sdpdone:
|
|
add esp, 48
|
|
popad
|
|
mov [EGA_counter],1
|
|
call VGA_drawbackground
|
|
ret
|
|
|
|
overlapping_of_points:
|
|
push ecx edx edi
|
|
mov ecx, eax
|
|
mov edx, ebx
|
|
movzx eax, cl
|
|
movzx ebx, dl
|
|
add eax, ebx
|
|
rcr eax, 1
|
|
movzx edi, ax
|
|
movzx eax, ch
|
|
movzx ebx, dh
|
|
add eax, ebx
|
|
rcr eax, 1
|
|
ror edi, 8
|
|
add edi, eax
|
|
shr ecx, 8
|
|
shr edx, 8
|
|
movzx eax, ch
|
|
movzx ebx, dh
|
|
add eax, ebx
|
|
rcr eax, 1
|
|
ror edi, 8
|
|
add eax, edi
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|
ror eax, 16
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|
pop edi edx ecx
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|
ret
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