窗口弹出前保存窗口内容到XMS(页 1) - C语言论坛 - C图形专区 - 编程论坛

beyondabcd 发表于 2007-9-18 15:46

窗口弹出前保存窗口内容到XMS

当窗口弹出前保存窗口内容到XMS char buf[800];//全局数组变量,每次取一行800个像素 unsigned short xms_handle;//XMS句柄 /**********************************************************/ /* 保存窗口内容到XMS /**********************************************************/ void Save_Window_XMS(int x1,int y1,int x2,int y2) { int i,j; unsigned short size,len; unsigned long offset = 0; char *pp;

 size = (x2-x1+1)*(y2-y1+1)/1024 +1; if (XMS_Size() < size) puts("not enough XMS"); if ((xms_handle = XMS_Alloc(size)) == 0)//XMS申请空间成功 puts("XMS handle Error...\n"); for (i= y1; i<=y2;i++) { pp=buf; for (j= x1; j<=x2;j++) *pp++ = getpixel(j,i);//在屏幕上获取像素点 len = x2-x1+1; Write_To_XMS(buf,len,xms_handle,offset);//缓冲区buf中存储的像素送至XMS offset += len; } } -------------------------------------------------------------------------------------------------------- 原程序是800X600模式的，用除１０２４，我想用640 X 480的模式，应该除什么数呀？

ba_wang_mao 发表于 2007-9-19 08:59

你没有搞明白，其实size = (x2-x1+1)*(y2-y1+1)/1024 +1;就是计算窗口区域占用多少K（1K＝1024字节） 因为子程序XMS_Size() 返回的是内存剩余空间有多少K

一笔苍穹 发表于 2007-9-19 09:52

TC256 XMS/EMS双内核版（未发布）的源码可能对LZ有帮助： <a href="http://www.ds0101.com/DownLoad/ShowInfo.asp?ID=48" target="_blank" >http://www.ds0101.com/DownLoad/ShowInfo.asp?ID=48</A>

ba_wang_mao 发表于 2007-9-19 12:00

支持！

beyondabcd 发表于 2007-9-19 14:49

不好意思,我问一个很莱的问题

beyondabcd 发表于 2007-9-19 15:10

#include "graphics.h" #include<dos.h>
#include<conio.h>
#include "stdio.h" #include "fcntl.h" #include "malloc.h" #include "io.h" #include "showbmp.c" #include "rsvga256.h" 
typedef unsigned int XMS_HANDLE; XMS_HANDLE xms_handle; /* 伪指针 */ XMS_HANDLE xms_save_restore_handle; /* 伪指针 */
typedef struct emm { unsigned int length; unsigned source_handle; unsigned long source_offset; unsigned dest_handle; unsigned long dest_offset; } xmm; xmm xms;

int far(* XMS_Function)( ); int xms_installed( ) { _AX=0x4300; geninterrupt(0x2f); if(_AL==0x80) { _AX=0x4310; geninterrupt(0x2f); XMS_Function=MK_FP(_ES,_BX); return(1); } else { printf("XMS is not installed\n!"); return(0); } }
int test_xms(unsigned int size) { _AH=8; XMS_Function( ); if(_AX<size) { printf("No enough XMS to be used!\n"); return(0); } else return(1); }
unsigned int alloc_xms(unsigned int size) { _DX=size; _AH=9; XMS_Function( ); if(_AX!=1) { printf("XMS allocation is error\n"); return(0); } else return(_DX); }
 int move_xms(xms) { _DS=FP_SEG(xms); _SI=FP_OFF(xms); _AH=0x0b; XMS_Function( );
 if(_AX!=1) { printf("XMS move error! %d\n",_BL); return(0); } else return(1); }
void free_xms(unsigned int handle) { _DX=handle; _AH=0x0a; XMS_Function( ); }
 /*----------------------------------------------------------- */ /* 从常规内存缓冲区buf装载到扩充内存 */ /*-----------------------------------------------------------*/
 void Write_To_XMS(char *buf, unsigned int size,unsigned handle,unsigned long offset) { xms.length=size; xms.source_handle = 0; xms.source_offset = FP_SEG((void far *)buf); xms.source_offset <<= 16; xms.source_offset += FP_OFF((void far *)buf); xms.dest_handle = handle; xms.dest_offset = offset; move_xms(&xms); }

 /*----------------------------------------------------------- */ /* 从扩充内存中读取信息到常规内存缓冲区buf */ /*-----------------------------------------------------------*/ void Read_From_XMS(char *buf,unsigned int size,unsigned handle,unsigned long offset) { xms.length = size; xms.source_handle = handle; xms.source_offset = offset; xms.dest_handle = 0; xms.dest_offset = FP_SEG((void far *)buf); xms.dest_offset <<= 16; xms.dest_offset += FP_OFF((void far *)buf); move_xms(&xms); }

 char sssbuf[400]; void Save_Image_XMS(int POPUP_x1,int POPUP_x2,int POPUP_y1,int POPUP_y2 ) { int i,j; unsigned int size; unsigned long offset = 0; char *pp;

 size = (POPUP_x2-POPUP_x1+1)*(POPUP_y2-POPUP_y1+1)/1024+1;
 if (test_xms(size)==0) puts("not enough XMS"); printf("%d",test_xms(size));getch(); if ((xms_save_restore_handle = alloc_xms(size)) == 0) puts("XMS handle Error...\n"); for (i= POPUP_y1; i<=POPUP_y2;i++) { size = POPUP_x2-POPUP_x1; printf("%d",size); pp = sssbuf; for (j= POPUP_x1; j<=POPUP_x2;j++) *pp++ = getpixel(j,i); Write_To_XMS(sssbuf,size,xms_save_restore_handle,offset); offset += size; } }

 void Restore_Image_XMS(int POPUP_x1,int POPUP_x2,int POPUP_y1,int POPUP_y2) { int i,j; unsigned short size; unsigned long offset = 0; char *pp;

 size = POPUP_x2-POPUP_x1; for (i= POPUP_y1; i<=POPUP_y2;i++) { Read_From_XMS(sssbuf,size,xms_save_restore_handle,offset); offset += size; pp = sssbuf; for (j= POPUP_x1; j<=POPUP_x2;j++) putpixel(j,i,*pp++);/* sssbuf[j-POPUP_x1]); */ } free_xms(xms_save_restore_handle); }
 int huge rReturn_SVGA256(void) { return(SVGA640x480x256); }
 void main() { int iii=DETECT, jjj=0;
 installuserdriver("Svga256", rReturn_SVGA256); /* 对于svga256必需执行该函数以安装BGI驱动 */ initgraph(&iii, &jjj, ""); printf("%d",xms_installed( ));getch(); show_bmp("main.bmp",0,0); getch(); Save_Image_XMS(50,110,50,100 ); getch(); show_bmp("bell.bmp",40,40); getch(); Restore_Image_XMS(50,110,50,100); getch(); closegraph(); }
程序走到黄体字时,就走不了,大家帮忙看看

 
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eakcon 发表于 2007-11-14 10:10

好强呀！
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窗口弹出前保存窗口内容到XMS