116 lines
3.5 KiB
NASM
116 lines
3.5 KiB
NASM
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; Command & Conquer Red Alert(tm)
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; Copyright 2025 Electronic Arts Inc.
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;
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; This program is free software: you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation, either version 3 of the License, or
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; (at your option) any later version.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;
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;***************************************************************************
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;** C O N F I D E N T I A L --- W E S T W O O D A S S O C I A T E S **
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;***************************************************************************
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;* *
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;* Project Name : Westwood 32 bit Library *
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;* *
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;* File Name : BITBLIT.ASM *
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;* *
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;* Programmer : Julio R. Jerez *
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;* *
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;* Start Date : Feb 6, 1995 *
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;* *
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;* *
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;*-------------------------------------------------------------------------*
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;* Functions: *
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;* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - *
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IDEAL
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P386
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MODEL USE32 FLAT
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LOCALS ??
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INCLUDE "mcgaprim.inc"
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INCLUDE "gbuffer.inc"
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; typedef struct {
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; int x0 , y0 ;
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; int x1 , y1 ;
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; } CLIP_WIN ;
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; Note for efficiency reasons x1 must be >= x0 and y1 >= y0
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; int get_clip ( CLIP_WIN * window , CLIP_WIN * sorce_rect ) ;
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CODESEG
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PROC get_clip C near
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USES eax , ebx
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;*===================================================================
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;* define the arguements that our function takes.
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;*===================================================================
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ARG win : dword
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ARG rect : dword
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mov edi , [ rect ]
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mov esi , [ win ]
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xor eax , eax
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xor edx , edx
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mov ecx , [ (RECTANGLE edi) . x0 ]
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mov ebx , [ (RECTANGLE edi) . x1 ]
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sub ecx , [ (RECTANGLE esi) . x0 ]
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sub ebx , [ (RECTANGLE esi) . x0 ]
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shld eax , ecx , 1
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shld edx , ebx , 1
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; mov ebx , [ (RECTANGLE esi) . x1 ]
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; inc ebx
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; mov [ rect ] , ebx
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mov ecx , [ (RECTANGLE edi) . x0 ]
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mov ebx , [ (RECTANGLE edi) . x1 ]
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sub ecx , [ (RECTANGLE esi) . x1 ]
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sub ebx , [ (RECTANGLE esi) . x1 ]
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dec ecx
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dec ebx
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shld eax , ecx , 1
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shld edx , ebx , 1
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mov ecx , [ (RECTANGLE edi) . y0 ]
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mov ebx , [ (RECTANGLE edi) . y1 ]
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sub ecx , [ (RECTANGLE esi) . y0 ]
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sub ebx , [ (RECTANGLE esi) . y0 ]
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shld eax , ecx , 1
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shld edx , ebx , 1
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; mov ebx , [ (RECTANGLE esi) . y1 ]
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; inc ebx
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; mov [ rect ] , ebx
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mov ecx , [ (RECTANGLE edi) . y0 ]
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mov ebx , [ (RECTANGLE edi) . y1 ]
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sub ecx , [ (RECTANGLE esi) . y1 ]
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sub ebx , [ (RECTANGLE esi) . y1 ]
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dec ecx
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dec ebx
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shld eax , ecx , 1
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shld edx , ebx , 1
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xor al , 5
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xor dl , 5
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mov ah , dl
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ret
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ENDP get_clip
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END
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