Windows cursors on linux

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How to load windows cursors (.cur) in Linux using XLib and Xcursors?
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Windows 7 Cursors download for Linux
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Convert Windows cursors to Linux cursors

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Windows to Linux cursor converter

Input files should be in inputs/*.ani and inputs/*.cur Output files will go to outputs/CURSORNAME/CURSORNAME*

Start with a default cursor theme, something like Adwaita

mkdir -p ~/.icons/THEMENAME cp /usr/share/icons/Adwaita/cursors ~/.icons/THEMENAME

Replace the cursors you want

cp outputs/CURSORNAME/CURSORNAME ~/.icons/THEMENAME/cursors/CURSOR_TO_REPLACE

You may also have to select the cursor theme. In Gnome, this is done using gnome-tweak-tool , in Appearance/Themes/Cursor select THEMENAME .

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Convert Windows cursors to Linux cursors

Источник

How to load windows cursors (.cur) in Linux using XLib and Xcursors?

Any obvious error? I can’t really find sources about Xcursor and i’m close to switch to typical OpenGL textures and get over it. NOTE: I’m already disabled Virtualbox integrated mouse, so the mouse is entirely on guest machine and i run it fullscreen.

@Leiaz, thank you for the comment. I assume the cursor you tested with is .xbm (x window bitmap) ? From documentation here i can’t really find out if Xcursor supports .cur or not. Thank you for the effort.

Oh .. that is probably the problem. file says it’s a «X11 cursor». .cur seems to be a Windows format. The Xcursor file format is defined in the man page, I don’t think it’s possible to use another format directly. There is a xcursorgen utility to create a Xcursor from PNG file(s).

@Leiaz, thank you. I had the impression .cur are compatible with Xcursor, but they’re not. Even .xbm or .xpm were not loaded. Your cursors loaded as well 🙂 although i can’t find out what they are or how to create them (i mean, specs) The only thing for sure their header start with Xcur.. . Convert PNGs to xcursor i don’t find it really good since i want to be able to use the same cursor in Windows/Linux and don’t like really to provide hotspots as well; perhaps some internal conversion from .cur to xcurso` might be the way once i find out the xcursor format. I’ll post my results.

There was a problem in Oracle Virtualbox not able to show hardware cursors on OpenGL context ; they’ve shown under it and this is known issue (as i learnt) for quite some time now. This gave the impression of cursors-not-loaded. I just switched to VMware and it doesn’t suffering from this.

1 Answer 1

Since i solved my problem i decided it’s a good idea to post my results, in hope of helping someone trying to make his application more cross-platform. My code follows, and explanation follows the code.

X11 development headers package (etc. libx11-dev)
Xcursor development headers package (etc. libxcursor-dev)
A portable header, like this one.

. // to store colors struct COLOR < uint8_t r,g,b,a; COLOR() < this->r = this->g = this->b = this->a = 0; > COLOR(uint8_t r,uint8_t g,uint8_t b) < this->r = r; this->g = g; this->b = b; this->a = 255; > bool operator == (COLOR c) const < return (r == c.r && g == c.g && b == c.b); >>; size_t get_bit(int32_t number,int8_t position) < size_t bitmask = 1 . // load cursor #if defined(_WIN32) // etc. use standard WinApi code, (HCURSOR)LoadImage(..) and such #endif #if defined(__linux__) Display* display = XOpenDisplay(NULL); string filename = "mycursor.cur"; // fread(buf,1,2,fp); // number of images // we're only interested in the first image fread(buf,1,1,fp); // width (0 to 255; 0=means 256 width) int8_t width = (buf[0]==0 ? 256 : buf[0]); fread(buf,1,1,fp); // height (0 to 255; 0=means 256 height) int8_t height = (buf[0]==0 ? 256 : buf[0]); fread(buf,1,1,fp); // number of colors in palette (0 for no palette) fread(buf,1,1,fp); // reserved. should be 0 fread(buf,1,2,fp); // hotspot x int16_t hotspot_x = buf[0] | (buf[1] <<8); fread(buf,1,2,fp); // hotspot y int16_t hotspot_y = buf[0] | (buf[1]<<8); fread(buf,1,4,fp); // image data in bytes fread(buf,1,4,fp); // offset to image data // Now we need to verify if image in .cur is BMP or PNG (Vista+) // We can't just check 'magic' since if it's BMP, the header will be missing (PNG is whole) // So we search for PNG magic; if doesnt exist, we have a BMP! // NOTE: for simplicity we go only for BMP for the moment. // So just check if 'biSize' is 40 (Windows NT & 3.1x or later) // BITMAPINFOHEADER fread(buf,1,4,fp); // biSize int32_t biSize = (buf[0]&0xff) | (buf[1]<<8) | (buf[2]<<16) | (buf[3]<<24); if (biSize!=40) < // error: file does not contain valid BMP data; return; >fread(buf,1,4,fp); // biWidth int32_t biWidth = (buf[0]&0xff) | (buf[1] <<8) | (buf[2]<<16) | (buf[3]<<24); fread(buf,1,4,fp); // biHeight (if positive =>bottom-up, if negative => up-bottom) int32_t biHeight = (buf[0]&0xff) | (buf[1] <<8) | (buf[2]<<16) | (buf[3]<<24); fread(buf,1,2,fp); // biPlanes fread(buf,1,2,fp); // biBitCount int16_t biBitCount = (buf[0]&0xff) | (buf[1]<<8) | (buf[2]<<16) | (buf[3]<<24); if (biBitCount!=24 && biBitCount!=32) < // error: only 24/32 bits supported; return; >fread(buf,1,4,fp); // biCompression int32_t biCompression = (buf[0]&0xff) | (buf[1] <<8) | (buf[2]<<16) | (buf[3]<<24); // we want only uncompressed BMP data if (biCompression!=0 /*BI_RGB*/ ) < // error: file is compressed; only uncompressed BMP is supported; return; >fread(buf,1,4,fp); // biSizeImage fread(buf,1,4,fp); // biXPelsPerMeter fread(buf,1,4,fp); // biYPelsPerMeter fread(buf,1,4,fp); // biClrUsed fread(buf,1,4,fp); // biClrImportant // DECODE IMAGE uint8_t origin = (biHeight>0 ? 0 : 1); // 0=bottom-up, 1=up-bottom // there are cases where BMP sizes are NOT the same with cursor; we use the cursor ones biWidth = width; biHeight = height; COLOR* pixels = new COLOR[biWidth * biHeight]; for(int32_t y=0;y > > // read mask // mask is 1-bit-per-pixel for describing the cursor bitmap's opaque and transparent pixels. // so for 1 pixel we need 1 bit, for etc. 32 pixels width, we need 32*1 bits (or 4 bytes per line) // so for etc. 32 pixels height we need 4*32 = 128 bytes or [mask bytes per line * height] uint16_t mask_bytes_per_line = biWidth / 8; uint16_t mask_bytes = mask_bytes_per_line * biHeight; char* mask = new char[mask_bytes]; fread(mask,1,mask_bytes,fp); fclose(fp); // reverse every [mask_bytes_per_line] bytes; (etc. for 4 bytes per line do: 0,1,2,3 => 3,2,1,0) -> you really need to ask Microsoft for this 8) char rmask[4]; for(uint16_t x=0;x // copy the reversed line for(uint16_t r=0;r > // now extract all bits from mask bytes into new array (equal to width*height) vector bits; for(uint16_t x=0;x > delete[] mask; // reverse vector (?) reverse(bits.begin(),bits.end()); // now the bits contains =1 (transparent) and =0 (opaque) which we use on cursor directly XcursorImage* cimg = XcursorImageCreate(biWidth,biHeight); cimg->xhot = hotspot_x; cimg->yhot = hotspot_y; // create the image for(int32_t y=0;ypixels[offset] = ((bits[offset]==1?0:pix.a) <<24) + (pix.r<<16) + (pix.g<<8) + (pix.b); >> // create cursor from image and release the image Cursor cursor = XcursorImageLoadCursor(display,cimg); XcursorImageDestroy(cimg); . // set the cursor XDefineCursor(display,yourwindow,cursor); XFlush(display); . // free cursor if (cursor!=None)

The above code takes a Windows .cur cursor file and creates an Xcursor for use in X11 window system. Of course, there are lots of limitations to my .cur format handling but one can easily add his own improvements to the above code (like say supporting 8-bit cursors). The above code not only take care of alpha-transparency but also 32-bit alpha-blended cursors

Источник

Windows 7 Cursors download for Linux

This is the Linux app named Windows 7 Cursors whose latest release can be downloaded as Cursor.zip. It can be run online in the free hosting provider OnWorks for workstations.

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DESCRIPTION

Windows 7 Cursors for Windows xp

This is an application that can also be fetched from https://sourceforge.net/projects/win7cursors/. It has been hosted in OnWorks in order to be run online in an easiest way from one of our free Operative Systems.

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