139 lines
3.2 KiB
Go
139 lines
3.2 KiB
Go
// +build windows
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package ct
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import (
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"syscall"
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"unsafe"
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)
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var fg_colors = []uint16{
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0,
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0,
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foreground_red,
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foreground_green,
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foreground_red | foreground_green,
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foreground_blue,
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foreground_red | foreground_blue,
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foreground_green | foreground_blue,
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foreground_red | foreground_green | foreground_blue}
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var bg_colors = []uint16{
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0,
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0,
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background_red,
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background_green,
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background_red | background_green,
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background_blue,
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background_red | background_blue,
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background_green | background_blue,
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background_red | background_green | background_blue}
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const (
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foreground_blue = uint16(0x0001)
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foreground_green = uint16(0x0002)
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foreground_red = uint16(0x0004)
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foreground_intensity = uint16(0x0008)
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background_blue = uint16(0x0010)
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background_green = uint16(0x0020)
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background_red = uint16(0x0040)
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background_intensity = uint16(0x0080)
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foreground_mask = foreground_blue | foreground_green | foreground_red | foreground_intensity
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background_mask = background_blue | background_green | background_red | background_intensity
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)
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var (
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kernel32 = syscall.NewLazyDLL("kernel32.dll")
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procGetStdHandle = kernel32.NewProc("GetStdHandle")
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procSetConsoleTextAttribute = kernel32.NewProc("SetConsoleTextAttribute")
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procGetConsoleScreenBufferInfo = kernel32.NewProc("GetConsoleScreenBufferInfo")
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hStdout uintptr
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initScreenInfo *console_screen_buffer_info
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)
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func setConsoleTextAttribute(hConsoleOutput uintptr, wAttributes uint16) bool {
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ret, _, _ := procSetConsoleTextAttribute.Call(
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hConsoleOutput,
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uintptr(wAttributes))
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return ret != 0
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}
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type coord struct {
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X, Y int16
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}
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type small_rect struct {
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Left, Top, Right, Bottom int16
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}
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type console_screen_buffer_info struct {
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DwSize coord
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DwCursorPosition coord
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WAttributes uint16
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SrWindow small_rect
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DwMaximumWindowSize coord
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}
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func getConsoleScreenBufferInfo(hConsoleOutput uintptr) *console_screen_buffer_info {
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var csbi console_screen_buffer_info
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ret, _, _ := procGetConsoleScreenBufferInfo.Call(
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hConsoleOutput,
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uintptr(unsafe.Pointer(&csbi)))
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if ret == 0 {
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return nil
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}
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return &csbi
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}
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const (
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std_output_handle = uint32(-11 & 0xFFFFFFFF)
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)
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func init() {
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kernel32 := syscall.NewLazyDLL("kernel32.dll")
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procGetStdHandle = kernel32.NewProc("GetStdHandle")
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hStdout, _, _ = procGetStdHandle.Call(uintptr(std_output_handle))
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initScreenInfo = getConsoleScreenBufferInfo(hStdout)
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syscall.LoadDLL("")
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}
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func resetColor() {
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if initScreenInfo == nil { // No console info - Ex: stdout redirection
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return
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}
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setConsoleTextAttribute(hStdout, initScreenInfo.WAttributes)
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}
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func changeColor(fg Color, fgBright bool, bg Color, bgBright bool) {
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attr := uint16(0)
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if fg == None || bg == None {
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cbufinfo := getConsoleScreenBufferInfo(hStdout)
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if cbufinfo == nil { // No console info - Ex: stdout redirection
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return
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}
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attr = getConsoleScreenBufferInfo(hStdout).WAttributes
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} // if
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if fg != None {
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attr = attr & ^foreground_mask | fg_colors[fg]
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if fgBright {
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attr |= foreground_intensity
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} // if
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} // if
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if bg != None {
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attr = attr & ^background_mask | bg_colors[bg]
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if bgBright {
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attr |= background_intensity
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} // if
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} // if
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setConsoleTextAttribute(hStdout, attr)
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}
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