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Initial commit of Command & Conquer Red Alert source code.
This commit is contained in:
LFeenanEA
315
WWFLAT32/MCGAPRIM/GBUFFER.CPP
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315
WWFLAT32/MCGAPRIM/GBUFFER.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 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 : GBUFFER.CPP *
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* *
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* Programmer : Phil W. Gorrow *
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* *
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* Start Date : May 3, 1994 *
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* *
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* Last Update : February 23, 1995 [PWG] *
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* *
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*-------------------------------------------------------------------------*
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* Functions: *
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* VVPC::VirtualViewPort -- Default constructor for a virtual viewport *
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* VVPC:~VirtualViewPortClass -- Destructor for a virtual viewport *
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* VVPC::Clear -- Clears a graphic page to correct color *
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* VBC::VideoBufferClass -- Lowlevel constructor for video buffer class *
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* GVPC::Change -- Changes position and size of a Graphic View Port *
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* VVPC::Change -- Changes position and size of a Video View Port *
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* Set_Logic_Page -- Sets LogicPage to new buffer *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#ifndef GBUFFER_H
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#include "gbuffer.h"
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#endif
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#pragma inline
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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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* GVPC::GRAPHICVIEWPORTCLASS -- Constructor for basic view port class *
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* m *
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* INPUT: GraphicBufferClass * gbuffer - buffer to attach to *
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* int x - x offset into buffer *
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* int y - y offset into buffer *
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* int w - view port width in pixels *
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* int 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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GraphicViewPortClass::GraphicViewPortClass(GraphicBufferClass *gbuffer, int x, int y, int w, int h)
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{
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Attach(gbuffer, x, y, w, h);
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}
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/***************************************************************************
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* GVPC::GRAPHICVIEWPORTCLASS -- 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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GraphicViewPortClass::GraphicViewPortClass(void)
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{
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}
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/***************************************************************************
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* GVPC::~GRAPHICVIEWPORTCLASS -- 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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GraphicViewPortClass::~GraphicViewPortClass(void)
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{
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}
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/***************************************************************************
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* GVPC::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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* int x - x position to attach to *
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* int y - y position to attach to *
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* int w - width of the view port *
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* int 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 GraphicViewPortClass::Attach(GraphicBufferClass *gbuffer, 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 >= gbuffer->Get_Width()) // you cannot place left edge off
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x = gbuffer->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 >= gbuffer->Get_Height()) // you cannot place view port off
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y = gbuffer->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 > gbuffer->Get_Width()) // if the x plus width is larger
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w = gbuffer->Get_Width() - x; // than physical, fix width
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if (y + h > gbuffer->Get_Height()) // if the y plus height is larger
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h = gbuffer->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 = gbuffer->Get_Offset() + (gbuffer->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 = gbuffer->Get_Width() - w;
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Width = w;
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Height = h;
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GraphicBuff = gbuffer;
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}
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/***************************************************************************
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* GVPC::CHANGE -- Changes position and size of a Graphic View Port *
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* *
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* INPUT: int the new x pixel position of the graphic view port *
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* int the new y pixel position of the graphic view port *
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* int the new width of the viewport in pixels *
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* int the new height of the viewport in pixels *
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* *
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* OUTPUT: BOOL whether the Graphic View Port could be sucessfully *
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* resized. *
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* *
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* WARNINGS: You may not resize a Graphic View Port which is derived *
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* from a Graphic 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 GraphicViewPortClass::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 Graphic View Port if it is actually the physical */
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/* representation of a Graphic Buffer. */
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/*======================================================================*/
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if (this == Get_Graphic_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 graphic buffer as if we were creating the */
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/* GraphicViewPort. */
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/*======================================================================*/
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Attach(Get_Graphic_Buffer(), x, y, w, h);
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return(TRUE);
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}
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/***************************************************************************
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* GBC::GRAPHICBUFFERCLASS -- Constructor for fixed size buffers *
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* *
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* INPUT: long size - size of the buffer to create *
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* int w - width of buffer in pixels (default = 320) *
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* int h - height of buffer in pixels (default = 200) *
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* void *buffer - a pointer to the buffer if any (optional) *
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* *
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* OUTPUT: *
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* *
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* WARNINGS: *
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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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GraphicBufferClass::GraphicBufferClass(long size, int w, int h, void *buffer)
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{
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Size = size; // find size of physical buffer
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if (buffer) { // if buffer is specified
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Buffer = (BYTE *)buffer; // point to it and mark
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Allocated = FALSE; // it as user allocated
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} else {
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Buffer = new BYTE[Size]; // otherwise allocate it and
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Allocated = TRUE; // mark it system alloced
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}
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Offset = (long)Buffer; // 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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GraphicBuff = this; // Get a pointer to our self
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}
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/*=========================================================================*
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* GBC::GRAPHICBUFFERCLASS -- inline constructor for GraphicBufferClass *
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* *
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* INPUT: int w - width of buffer in pixels (default = 320) *
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* int h - height of buffer in pixels (default = 200) *
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* void *buffer - a pointer to the buffer if any (optional) *
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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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GraphicBufferClass::GraphicBufferClass(int w, int h, void *buffer)
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{
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Size = w * h; // find size of physical buffer
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if (buffer) { // if buffer is specified
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Buffer = (BYTE *)buffer; // point to it and mark
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Allocated = FALSE; // it as user allocated
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} else {
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Buffer = new BYTE[Size]; // otherwise allocate it and
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Allocated = TRUE; // mark it system alloced
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}
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Offset = (long)Buffer; // 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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GraphicBuff = this; // Get a pointer to our self
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}
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/*=========================================================================*
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* GBC::~GRAPHICBUFFERCLASS -- Destructor for the graphic 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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GraphicBufferClass::~GraphicBufferClass()
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{
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}
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/***************************************************************************
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* SET_LOGIC_PAGE -- Sets LogicPage to new buffer *
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* *
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* INPUT: GraphicBufferClass * the buffer we are going to set *
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* *
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* OUTPUT: GraphicBufferClass * the previous buffer type *
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* *
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* WARNINGS: *
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* *
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* HISTORY: *
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* 02/23/1995 PWG : Created. *
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*=========================================================================*/
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GraphicBufferClass *Set_Logic_Page(GraphicBufferClass *ptr)
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{
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GraphicBufferClass *old = LogicPage;
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LogicPage = ptr;
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return(old);
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}
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/***************************************************************************
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* SET_LOGIC_PAGE -- Sets LogicPage to new buffer *
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* *
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* INPUT: GraphicBufferClass & the buffer we are going to set *
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* *
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* OUTPUT: GraphicBufferClass * the previous buffer type *
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* *
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* WARNINGS: *
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* *
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* HISTORY: *
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* 02/23/1995 PWG : Created. *
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*=========================================================================*/
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GraphicBufferClass *Set_Logic_Page(GraphicBufferClass &ptr)
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{
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GraphicBufferClass *old = LogicPage;
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LogicPage = &ptr;
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return(old);
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}
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