X11: ディスプレイの情報

#include <stdio.h>
#include <X11/Xlib.h>

int main(int argc,char **argv)
{
    Display *d;
    Screen *s;
    XPixmapFormatValues *pixf;
    int i,cnt,*narr;
    
    d = XOpenDisplay(NULL);
    if(!d) return 1;

    printf("ConnectionNumber: %d\n", ConnectionNumber(d));
    printf("DefaultRootWindow(XID): %lu\n", DefaultRootWindow(d));
    printf("DefaultScreen: %d\n", DefaultScreen(d));
    printf("DisplayString: '%s'\n", DisplayString(d));
    printf("LastKnownRequestProcessed: %lu\n", LastKnownRequestProcessed(d));
    printf("NextRequest: %lu\n", NextRequest(d));
    printf("ProtocolVersion: %d\n", ProtocolVersion(d));
    printf("ProtocolRevision: %d\n", ProtocolRevision(d));
    printf("QLength: %d\n", QLength(d));
    printf("ScreenCount: %d\n", ScreenCount(d));
    printf("ServerVendor: '%s'\n", ServerVendor(d));
    printf("VendorRelease: 0x%x\n", VendorRelease(d));

    //screen

    s = DefaultScreenOfDisplay(d);

    printf("\n[screen]\n");
    printf("BlackPixelOfScreen: 0x%lx\n", BlackPixelOfScreen(s));
    printf("WhitePixelOfScreen: 0x%lx\n", WhitePixelOfScreen(s));
    printf("CellsOfScreen: %d\n", CellsOfScreen(s));
    printf("DefaultColormapOfScreen(XID): %lu\n", DefaultColormapOfScreen(s));
    printf("DefaultDepthOfScreen: %d\n", DefaultDepthOfScreen(s));
    printf("DoesBackingStore: %d\n", DoesBackingStore(s));
    printf("DoesSaveUnders: %d\n", DoesSaveUnders(s));
    printf("EventMaskOfScreen: 0x%lx\n", EventMaskOfScreen(s));
    printf("WidthOfScreen: %d\n", WidthOfScreen(s));
    printf("HeightOfScreen: %d\n", HeightOfScreen(s));
    printf("WidthMMOfScreen: %d\n", WidthMMOfScreen(s));
    printf("HeightMMOfScreen: %d\n", HeightMMOfScreen(s));
    printf("MaxCmapsOfScreen: %d\n", MaxCmapsOfScreen(s));
    printf("MinCmapsOfScreen: %d\n", MinCmapsOfScreen(s));
    printf("PlanesOfScreen: %d\n", PlanesOfScreen(s));
    printf("RootWindowOfScreen(XID): %lu\n", RootWindowOfScreen(s));

    //使用可能な深さ

    narr = XListDepths(d, DefaultScreen(d), &cnt);
    if(narr)
    {
        printf("\n[depths]\n");
        
        for(i = 0; i < cnt; i++)
            printf("%d,", narr[i]);

        printf("\n");
        
        XFree(narr);
    }

    //イメージフォーマット

    printf("\n[image]\n");

    printf("ImageByteOrder: %d\n", ImageByteOrder(d));
    printf("BitmapUnit: %d\n", BitmapUnit(d));
    printf("BitmapBitOrder: %d\n", BitmapBitOrder(d));
    printf("BitmapPad: %d\n", BitmapPad(d));

    pixf = XListPixmapFormats(d, &cnt);
    if(pixf)
    {
        printf("\n[ListPixmapFormats]\n");
        
        for(i = 0; i < cnt; i++)
        {
            printf("depth: %d, bits_per_pixel:%d, scanline_pad:%d\n",
                pixf[i].depth, pixf[i].bits_per_pixel, pixf[i].scanline_pad);
        }

        printf("\n");
    
        XFree(pixf);
    }

    //閉じる

    XCloseDisplay(d);

    return 0;
}

ConnectionNumber: 3
DefaultRootWindow(XID): 1892
DefaultScreen: 0
DisplayString: ':0'
LastKnownRequestProcessed: 6
NextRequest: 7
ProtocolVersion: 11
ProtocolRevision: 0
QLength: 0
ScreenCount: 1
ServerVendor: 'The X.Org Foundation'
VendorRelease: 0xb8a590

[screen]
BlackPixelOfScreen: 0x0
WhitePixelOfScreen: 0xffffff
CellsOfScreen: 256
DefaultColormapOfScreen(XID): 32
DefaultDepthOfScreen: 24
DoesBackingStore: 1
DoesSaveUnders: 0
EventMaskOfScreen: 0x7a003f
WidthOfScreen: 1920
HeightOfScreen: 1080
WidthMMOfScreen: 508
HeightMMOfScreen: 285
MaxCmapsOfScreen: 1
MinCmapsOfScreen: 1
PlanesOfScreen: 24
RootWindowOfScreen(XID): 1892

[depths]
24,1,4,8,15,16,32,

[image]
ImageByteOrder: 0
BitmapUnit: 32
BitmapBitOrder: 0
BitmapPad: 32

[ListPixmapFormats]
depth: 1, bits_per_pixel:1, scanline_pad:32
depth: 4, bits_per_pixel:8, scanline_pad:32
depth: 8, bits_per_pixel:8, scanline_pad:32
depth: 15, bits_per_pixel:16, scanline_pad:32
depth: 16, bits_per_pixel:16, scanline_pad:32
depth: 24, bits_per_pixel:32, scanline_pad:32
depth: 32, bits_per_pixel:32, scanline_pad:32

int *XListDepths(Display *display, int screen_number, int *count_return);

24,1,4,8,15,16,32