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Initial commit of Command & Conquer Red Alert source code.
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LFeenanEA
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WIN32LIB/SRCDEBUG/VBUFFER.CPP
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WIN32LIB/SRCDEBUG/VBUFFER.CPP
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/*
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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 S T U D I O 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 : VBUFFER.CPP *
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* *
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* Programmer : Phil W. Gorrow *
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* *
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* Start Date : January 9, 1995 *
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* *
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* Last Update : January 9, 1995 [PWG] *
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* *
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* This module contains the C++ class definitions for the video buffer *
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* class. This include routines for class creation and modification *
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*-------------------------------------------------------------------------*
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* Functions: *
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* VVPC::VideoViewPortClass -- Constructor for basic view port class *
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* VVPC::VideoViewPortClass -- Default constructor for view port class *
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* VVPC::~VideoViewPortClass -- Destructor for GraphicViewPortClass *
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* VVPC::Attach -- Attaches a viewport to a buffer class *
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* VVPC::Change -- Changes position and size of a Video View Port *
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* VBC::VideoBufferClass -- Default constuctor for video buffers *
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* VBC::VideoBufferClass -- Lowlevel constructor for video buffer class *
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* VBC::~VideoBufferClass -- Destructor for the video buffer class *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#include "vbuffer.h"
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/*=========================================================================*/
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/* The following PRIVATE functions are in this file: */
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/*=========================================================================*/
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/*= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =*/
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/***************************************************************************
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* VVPC::VIDEOVIEWPORTCLASS -- Constructor for basic view port class *
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* *
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* INPUT: VideoBufferClass * vbuffer - buffer to attach to *
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* WORD x - x offset into buffer *
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* WORD y - y offset into buffer *
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* WORD w - view port width in pixels *
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* WORD h - view port height in pixels *
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* *
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* OUTPUT: Constructors may not have a return value *
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* *
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* HISTORY: *
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* 05/09/1994 PWG : Created. *
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*=========================================================================*/
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VideoViewPortClass::VideoViewPortClass(VideoBufferClass *vbuffer, int x, int y, int w, int h)
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{
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Attach(vbuffer, x, y, w, h);
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}
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/***************************************************************************
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* VVPC::VIDEOVIEWPORTCLASS -- Default constructor for view port class *
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* *
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* INPUT: none *
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* *
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* OUTPUT: none *
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* *
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* HISTORY: *
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* 05/09/1994 PWG : Created. *
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*=========================================================================*/
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VideoViewPortClass::VideoViewPortClass(void)
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{
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}
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/***************************************************************************
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* VVPC::~VIDEOVIEWPORTCLASS -- Destructor for GraphicViewPortClass *
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* *
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* INPUT: none *
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* *
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* OUTPUT: A destructor may not return a value. *
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* *
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* HISTORY: *
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* 05/10/1994 PWG : Created. *
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*=========================================================================*/
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VideoViewPortClass::~VideoViewPortClass(void)
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{
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}
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/***************************************************************************
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* VVPC::ATTACH -- Attaches a viewport to a buffer class *
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* *
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* INPUT: GraphicBufferClass *g_buff - pointer to gbuff to attach to *
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* WORD x - x position to attach to *
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* WORD y - y position to attach to *
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* WORD w - width of the view port *
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* WORD h - height of the view port *
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* *
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* OUTPUT: none *
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* *
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* HISTORY: *
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* 05/10/1994 PWG : Created. *
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*=========================================================================*/
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void VideoViewPortClass::Attach(VideoBufferClass *vbuffer, int x, int y, int w, int h)
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{
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/*======================================================================*/
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/* Verify that the x and y coordinates are valid and placed within the */
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/* physical buffer. */
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/*======================================================================*/
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if (x < 0) // you cannot place view port off
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x = 0; // the left edge of physical buf
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if (x >= vbuffer->Get_Width()) // you cannot place left edge off
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x = vbuffer->Get_Width() - 1; // the right edge of physical buf
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if (y < 0) // you cannot place view port off
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y = 0; // the top edge of physical buf
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if (y >= vbuffer->Get_Height()) // you cannot place view port off
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y = vbuffer->Get_Height() - 1; // bottom edge of physical buf
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/*======================================================================*/
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/* Adjust the width and height of necessary */
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/*======================================================================*/
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if (x + w > vbuffer->Get_Width()) // if the x plus width is larger
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w = vbuffer->Get_Width() - x; // than physical, fix width
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if (y + h > vbuffer->Get_Height()) // if the y plus height is larger
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h = vbuffer->Get_Height() - y; // than physical, fix height
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/*======================================================================*/
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/* Get a pointer to the top left edge of the buffer. */
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/*======================================================================*/
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Offset = vbuffer->Get_Offset() + (vbuffer->Get_Width() * y) + x;
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/*======================================================================*/
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/* Copy over all of the variables that we need to store. */
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/*======================================================================*/
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XPos = x;
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YPos = y;
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XAdd = vbuffer->Get_Width() - w;
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Width = w;
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Height = h;
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VideoBuff = vbuffer;
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}
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/***************************************************************************
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* VVPC::CHANGE -- Changes position and size of a Video View Port *
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* *
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* INPUT: WORD the new x pixel position of the Video view port *
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* WORD the new y pixel position of the Video view port *
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* WORD the new width of the viewport in pixels *
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* WORD the new height of the viewport in pixels *
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* *
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* OUTPUT: BOOL whether the Video View Port could be sucessfully *
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* resized. *
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* *
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* WARNINGS: You may not resize a Video View Port which is derived *
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* from a Video View Port Buffer, *
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* *
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* HISTORY: *
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* 09/14/1994 SKB : Created. *
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*=========================================================================*/
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BOOL VideoViewPortClass::Change(int x, int y, int w, int h)
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{
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/*======================================================================*/
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/* Can not change a Video View Port if it is actually the physical */
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/* representation of a Video Buffer. */
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/*======================================================================*/
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if (this == Get_Video_Buffer()) {
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return(FALSE);
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}
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/*======================================================================*/
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/* Since there is no allocated information, just re-attach it to the */
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/* existing Video buffer as if we were creating the */
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/* VideoViewPort. */
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/*======================================================================*/
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Attach(Get_Video_Buffer(), x, y, w, h);
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return(TRUE);
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}
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/***************************************************************************
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* VBC::VIDEOBUFFERCLASS -- Default constuctor for video buffers *
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* *
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* INPUT: WORD w - width of buffer in pixels (default = 320) *
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* WORD h - height of buffer in pixels (default = 200) *
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* *
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* OUTPUT: none *
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* *
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* HISTORY: *
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* 05/13/1994 PWG : Created. *
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*=========================================================================*/
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VideoBufferClass::VideoBufferClass(int w, int h)
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{
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Offset = 0xa0000; // Get offset to the buffer
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Width = w; // Record width of Buffer
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Height = h; // Record height of Buffer
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XAdd = 0; // Record XAdd of Buffer
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XPos = 0; // Record XPos of Buffer
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YPos = 0; // Record YPos of Buffer
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VideoBuff = this; // Get a pointer to our self
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}
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/***************************************************************************
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* VBC::VIDEOBUFFERCLASS -- Lowlevel constructor for video buffer class *
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* *
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* INPUT: UWORD the selector of the memory reference *
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* long the offset of the memory reference *
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* WORD the width of the video buffer *
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* WORD the height of the video buffer *
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* *
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* OUTPUT: none *
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* *
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* HISTORY: *
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* 06/07/1994 PWG : Created. *
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*=========================================================================*/
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VideoBufferClass::VideoBufferClass(unsigned short selector, long offset, int w, int h)
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{
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Offset = offset; // Get offset to the buffer
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Width = w; // Record width of Buffer
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Height = h; // Record height of Buffer
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XAdd = 0; // Record XAdd of Buffer
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XPos = 0; // Record XPos of Buffer
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YPos = 0; // Record YPos of Buffer
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VideoBuff = this; // Get a pointer to our self
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}
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/*=========================================================================*
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* VBC::~VIDEOBUFFERCLASS -- Destructor for the video buffer class *
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* *
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* INPUT: none *
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* *
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* OUTPUT: none *
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* *
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* HISTORY: *
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* 05/03/1994 PWG : Created. *
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*=========================================================================*/
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VideoBufferClass::~VideoBufferClass()
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{
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}
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