Initial commit of Command & Conquer Red Alert source code.

2025-12-16 07:31:39 -05:00 · 2025-02-27 16:15:05 +00:00
parent b685cea758
commit 5e733d5dcc
2082 changed files with 797727 additions and 0 deletions
--- a/VQ/VQM32/VESABLIT.CPP
+++ b/VQ/VQM32/VESABLIT.CPP
@@ -0,0 +1,135 @@
+/*
+**	Command & Conquer Red Alert(tm)
+**	Copyright 2025 Electronic Arts Inc.
+**
+**	This program is free software: you can redistribute it and/or modify
+**	it under the terms of the GNU General Public License as published by
+**	the Free Software Foundation, either version 3 of the License, or
+**	(at your option) any later version.
+**
+**	This program is distributed in the hope that it will be useful,
+**	but WITHOUT ANY WARRANTY; without even the implied warranty of
+**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+**	GNU General Public License for more details.
+**
+**	You should have received a copy of the GNU General Public License
+**	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/****************************************************************************
+*
+*         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
+*
+*----------------------------------------------------------------------------
+*
+* FILE
+*     vesablit.c
+*
+* DESCRIPTION
+*     VESA bitblit routines. (32-Bit protected mode)
+*
+* PROGRAMMER
+*     Bill Randolph
+*     Denzil E. Long, Jr.
+*
+* DATE
+*     January 26, 1995
+*
+*----------------------------------------------------------------------------
+*
+* PUBLIC
+*     VESA_Blit_640x480 - Blit to 640x480 256 color VESA mode.
+*
+****************************************************************************/
+
+#include <stdio.h>
+#include <mem.h>
+#include <dos.h>
+#include "video.h"
+#include "vesavid.h"
+#include "vesablit.h"
+
+
+/****************************************************************************
+*
+* NAME
+*     VESA_Blit_640x480 - Blit to 640x480 256 color VESA mode.
+*
+* SYNOPSIS
+*     VESA_Blit_640x480(DisplayInfo, Buffer, X, Y, Width, Height)
+*
+*     void VESA_Blit_640x480(DisplayInfo *, char *, long, long, long, long);
+*
+* FUNCTION
+*
+* INPUTS
+*     DisplayInfo - Pointer to display information structure.
+*     Buffer      - Pointer to buffer to blit to VRAM.
+*     X           - Destination X coordinate of blit (upper left).
+*     Y           - Destination Y coordinate of blit (upper left).
+*     Width       - Width of blit.
+*     Height      - Height of blit.
+*
+* RESULT
+*     NONE
+*
+****************************************************************************/
+
+void VESA_Blit_640x480(DisplayInfo *disp,unsigned char *buf,long x1,long y1,
+		long width,long height)
+{
+	VESAModeInfo *vminfo;
+	long         bank;
+	long         last_bank;
+	long         bank_offset;
+	long         scrn_offset;
+	long         grains_per_win;
+	long         part1;
+	long         part2;
+	long         i;
+
+	/* Initialize values */
+	vminfo = (VESAModeInfo *)disp->Extended;
+	scrn_offset = ((disp->XRes * y1) + x1);
+	grains_per_win = ((long)vminfo->WinSize / (long)vminfo->WinGranularity);
+	bank_offset = scrn_offset % 65536L;
+	last_bank = -1;
+
+	for (i = 0; i < height; i++) {
+
+		/* Compute which bank this scanline is in */
+		bank = (scrn_offset / 65536L);
+
+		/* Set a new bank */
+		if (bank != last_bank) {
+			SetVESAWindow(bank);
+			last_bank = bank;
+			bank_offset = (scrn_offset % 65536L);
+		}
+
+		/* Copy a full scanline */
+		if ((bank_offset + width) < 65536L) {
+			Copy_Row((char *)buf, (char *)bank_offset, width);
+			buf += width;
+			scrn_offset += disp->XRes;
+			bank_offset += disp->XRes;
+		}
+
+		/* Copy two partial scanlines */
+		else {
+			part1 = (65536L - bank_offset);
+			part2 = (width - part1);
+			Copy_Row((char *)buf, (char *)bank_offset, part1);
+
+			buf += part1;
+			bank += grains_per_win;
+			last_bank += grains_per_win;
+			SetVESAWindow(bank);
+			Copy_Row((char *)buf, (char *)0, part2);
+
+			buf += part2;
+			scrn_offset += disp->XRes;
+			bank_offset = (scrn_offset % 65536L);
+		}
+	}
+}