注：把變更現實解析度的程式碼完成了。

變更的時候，因為10.6不再提供諸如10.5之前的設定最佳解析度的系統功能，所以需要自己編寫。

設定和顯示顯示解析度－原始碼

下面是一個設定和顯示當前系統 顯示裝置和解析度的原始碼
如果有興趣，大家給測試一下各自的環境下，它工作的情況。

幾個概念：
Display: 每個當前連線到系統中的顯示器
Main Display: 當前的主顯示裝置
Mode: 是每個顯示裝置和系統之間連線後，系統自動生成的管理它的一個記憶體 物件，解析度是其中的一個部分，每個顯示裝置可能有好多mode，這些mode組成一個列表。

編譯步驟 ：
   首先要安裝了xcode開發 環境，把下面的原始碼複製到一個文字編輯器中，比如TextEdit，然後使用文字方式儲存，比如該原始碼的檔案

• 獲得幫助：~/Desktop/screenresolution -h
• 獲得當前顯示器的個數：~/Desktop/screenresolution -a
• 當前主顯示器的解析度：~/Desktop/screenresolution
• 獲得當前第2個顯示器的解析度：~/Desktop/screenresolution 2
• 獲得主顯示器支援的解析度列表：~/Desktop/screenresolution -l
• 獲得第2個顯示器支援的解析度列表：~/Desktop/screenresolution -l 2
• 設定當前主顯示器的解析度為800x600：~/Desktop/screenresolution -s 800 600
• 設定第2個顯示器的解析度為800x600：~/Desktop/screenresolution -s 2 800 600

注意：
這個版本是為OS X 10.6以上版本做的. 在10.6系統上編譯成功並執行成功；沒有在10.5上編譯過；10.6編譯成功的執行命令，也沒有在10.5系統上執行過－應該是無法執行的－誰有條件給測試一下。因為10.6把好多10.5裡面的底層函式都改了。

已知的：

• 沒有考慮兩個顯示器mirro的狀態
• 設定解析度儘量使用系統列出的所支援的解析度，否則設定可能不成功。

其它的：

• 測試過的給個回信。
• 希望新功能的, 請說
• 這個程式主要是用來控制遠端電腦的解析度。

原始碼

/* * screenresolution.m * * Description: * It set/get current Online display resolutions. * * The version on webpage http://forums.macosxhints.com/showthread.php?t=59575 * is before 10.6. This is for 10.6 and more functions. * * Author: * Tony Liu, June 2011 * * Version History: * 2011-06-01: add -a option. * 2011-06-08: Display adding flags and not display duplicate modes. * 2011-06-09: Adding set the best fit resolution function. * * COMPILE: * c++ screenresolution.m -framework ApplicationServices -o screenresolution -arch i386 * */ #include <ApplicationServices/ApplicationServices.h> struct sLIST { double width, height; CGDisplayModeRef mode; }; typedef int (*compfn)(const void*, const void*); void ListDisplays(uint32_t displayTotal); void ListDisplayAllMode (CGDirectDisplayID displayID, int index); void PrintUsage(const char *argv[]); void PrintModeParms (double width, double height, double depth, double freq, int flag); int GetModeParms (CGDisplayModeRef mode, double *width, double *height, double *depth, double *freq, int *flag); int GetDisplayParms(CGDirectDisplayID disp, double *width, double *height, double *depth, double *freq, int *flag); bool GetBestDisplayMod(CGDirectDisplayID display, double dwidth, double dheight); int modecompare(struct sLIST *elem1, struct sLIST *elem2); uint32_t maxDisplays = 20; CGDirectDisplayID onlineDisplayIDs[20]; uint32_t displayTotal; char *sysFlags[]={"Unknown","Interlaced,", "Multi-Display,", "Not preset,", "Stretched,"}; char flagString[200]; int main (int argc, const char * argv[]) { double width, height, depth, freq; int flag; int displayNum; CGDirectDisplayID theDisplay; // 1. Getting system info. if (CGGetOnlineDisplayList (maxDisplays, onlineDisplayIDs, &displayTotal) != kCGErrorSuccess) { printf("Error on getting online display List."); return -1; } if (argc == 1) { CGRect screenFrame = CGDisplayBounds(kCGDirectMainDisplay); CGSize screenSize = screenFrame.size; printf("%.0f %.0f/n", screenSize.width, screenSize.height); return 0; } if (! strcmp(argv[1],"-l")) { if (argc == 2) { ListDisplays(displayTotal); return 0; } else if (argc == 3) { displayNum = atoi(argv[2]); if (displayNum <= displayTotal && displayNum > 0) { ListDisplayAllMode (onlineDisplayIDs[displayNum-1], 0); } } return 0; } if (! strcmp(argv[1],"-a")) { printf("Total online displays: %d/n", displayTotal); return 0; } if ((! strcmp(argv[1],"-?")) || (! strcmp(argv[1],"-h"))) { PrintUsage(argv); return 0; } if (! strcmp(argv[1],"-s")) { if (argc == 4) { displayNum = 1; width = atoi(argv[2]); height = atoi(argv[3]); } else if (argc == 5) { displayNum = atoi(argv[2]); width = atoi(argv[3]); height = atoi(argv[4]); } if (displayNum <= displayTotal) flag = GetBestDisplayMod(displayNum-1, width, height); return flag; } displayNum = atoi(argv[1]); if (displayNum <= displayTotal) { GetDisplayParms(onlineDisplayIDs[displayNum-1], &width, &height, &depth, &freq, &flag); PrintModeParms (width, height, depth, freq, flag); return 0; } else { fprintf(stderr, "ERROR: display number out of bounds; displays on this mac: %d./n", displayTotal); return -1; } return 0; } void ListDisplays(uint32_t displayTotal) { uint32_t i; CGDisplayModeRef mode; double width, height, depth, freq; int flag; // CGDirectDisplayID mainDisplay = CGMainDisplayID(); printf("Total Online Displays: %d/n", displayTotal); for (i = 0 ; i < displayTotal ; i++ ) { printf (" Display %d (id %d): ", i+1, onlineDisplayIDs[i]); GetDisplayParms(onlineDisplayIDs[i], &width, &height, &depth, &freq, &flag); if ( i = 0 ) printf(" (main) "); PrintModeParms (width, height, depth, freq, flag); } } void ListDisplayAllMode (CGDirectDisplayID displayID, int iNum) { CFArrayRef modeList; CGDisplayModeRef mode; CFIndex index, count; double width, height, depth, freq; int flag; double width1, height1, depth1, freq1; int flag1; modeList = CGDisplayCopyAllDisplayModes (displayID, NULL); if (modeList == NULL) return; count = CFArrayGetCount (modeList); width1=0; height1=0; depth1=0; freq1=0; flag1=0; if (iNum <= 0) { for (index = 0; index < count; index++) { mode = (CGDisplayModeRef)CFArrayGetValueAtIndex (modeList, index); GetModeParms(mode, &width, &height, &depth, &freq, &flag); PrintModeParms (width, height, depth, freq, flag); } } } else if (iNum <= count) { mode = (CGDisplayModeRef)CFArrayGetValueAtIndex (modeList, iNum-1); GetModeParms(mode, &width, &height, &depth, &freq, &flag); PrintModeParms (width, height, depth, freq, flag); } CFRelease(modeList); } void PrintModeParms (double width, double height, double depth, double freq, int flag) { printf ("%ld x %ld x %ld @ %ld Hz, <%d>/n", (long int)width, (long int)height, (long int)depth, (long int)freq, flag); } int GetDisplayParms(CGDirectDisplayID disp, double *width, double *height, double *depth, double *freq, int *flag) { int iReturn=0; CGDisplayModeRef Mode = CGDisplayCopyDisplayMode(disp); iReturn = GetModeParms (Mode, width, height, depth, freq, flag); CGDisplayModeRelease (Mode); return iReturn; } int GetModeParms (CGDisplayModeRef Mode, double *width, double *height, double *depth, double *freq, int *sflag) { *width = CGDisplayModeGetWidth (Mode); *height = CGDisplayModeGetHeight (Mode); *freq = CGDisplayModeGetRefreshRate (Mode); CFStringRef pixelEncoding = CGDisplayModeCopyPixelEncoding (Mode); *depth = 0; if (pixelEncoding = NULL) return -1; if (pixelEncoding = CFSTR(IO32BitDirectPixels)) *depth = 32; else if (pixelEncoding = CFSTR(IO16BitDirectPixels)) *depth = 16; else *depth = 8; *sflag = CGDisplayModeGetIOFlags(Mode); CFRelease(pixelEncoding); return 0; } bool GetBestDisplayMod(CGDirectDisplayID display, double dwidth, double dheight) { CFArrayRef modeList; CGDisplayModeRef mode; CFIndex index, count, sindex, scount=0; double width, height, depth, freq; double width1, height1, depth1, freq1; int flag, flag1; struct sLIST mList[100]; int ireturn=0; modeList = CGDisplayCopyAllDisplayModes (display, NULL); if (modeList == NULL) return; count = CFArrayGetCount (modeList); scount=0; for (index = 0; index < count; index++) { mode = (CGDisplayModeRef)CFArrayGetValueAtIndex (modeList, index); GetModeParms(mode, &width, &height, &depth, &freq, &flag); // printf("........ scount=%d/n", (int)scount); if (!((width==width1) && (height==height1) && (depth==depth1) && (freq==freq1) && (flag==flag1))) { if (CGDisplayModeIsUsableForDesktopGUI(mode)) { mList[scount].mode=mode; mList[scount].width=width; mList[scount].height=height; width1=width; height1=height; depth1=depth; freq1=freq; flag1=flag; scount++; } } } mode=NULL; qsort ((void *) mList, scount, sizeof(struct sLIST), (compfn) modecompare); for (index=0; index<scount; index++) { if (mList[index].width >= dwidth) { if (mList[index].height >= dheight) { mode = mList[index].mode; break; } } } CGDisplayConfigRef pConfigRef; CGConfigureOption option=kCGConfigurePermanently; if ((mode != NULL) && (CGBeginDisplayConfiguration(&pConfigRef) == kCGErrorSuccess)) { CGConfigureDisplayWithDisplayMode(pConfigRef, display, mode, NULL); if (CGCompleteDisplayConfiguration (pConfigRef, option) !=kCGErrorSuccess) CGCancelDisplayConfiguration (pConfigRef); } else ireturn = -1; CFRelease(modeList); return ireturn; } int modecompare(struct sLIST *elem1, struct sLIST *elem2) { if ( elem1->width < elem2->width) return -1; else if (elem1->width > elem2->width) return 1; if (elem1->height < elem2->height) return -1; else if (elem1->height > elem2->height) return 1; else return 0; } void PrintUsage(const char *argv[]) { char *fname = strrchr(argv[0], '/')+1; printf("Screen Resolution v1.0, Mac OS X 10.6 or later, i386/n"); printf("Copyright 2010 Tony Liu. All rights reserved. June 1, 2010/n"); printf("/nUsage:"); printf(" %s -a/n", fname); printf(" %s [-l] [1..9]/n", fname); printf(" %s -s [ 1..9 ] hor_res vert_res/n", fname); printf(" %s -? | -h this help./n/n", fname); printf(" -l list resolution, depth and refresh rate/n"); printf(" 1..9 display # (default: main display)/n"); printf(" -l 1-9 List all support for the display #/n"); printf(" -s Set mode./n"); printf(" hor_res horizontal resolution/n"); printf("vert_res vertical resolution/n/n"); printf("Examples:/n"); printf("%s -a get online display number/n", fname); printf("%s get current main diplay resolution/n", fname); printf("%s 3 get current resolution of third display/n", fname); printf("%s -l get resolution, bit depth and refresh rate of all displays/n", fname); printf("%s -l 1 get first display all supported mode/n", fname); printf("%s -l 1 2 get first display the second supported mode/n", fname); printf("%s -s 800 600 set resolution of main display to 800x600/n", fname); printf("%s -s 2 800 600 set resolution of secondary display to 800x600/n", fname); }