148 lines
3.9 KiB
Go
148 lines
3.9 KiB
Go
package wingui
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import (
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"syscall"
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"unsafe"
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)
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const (
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WM_PAINT = 15
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BI_RGB = 0
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BI_BITFIELDS = 3
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DIB_PAL_COLORS = 1
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DIB_RGB_COLORS = 0
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BLACKNESS = 0x42
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DSTINVERT = 0x550009
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MERGECOPY = 0xC000CA
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MERGEPAINT = 0xBB0226
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NOTSRCCOPY = 0x330008
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NOTSRCERASE = 0x1100A6
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PATCOPY = 0xF00021
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PATINVERT = 0x5A0049
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PATPAINT = 0xFB0A09
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SRCAND = 0x8800C6
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SRCCOPY = 0xCC0020
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SRCERASE = 0x440328
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SRCINVERT = 0x660046
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SRCPAINT = 0xEE0086
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WHITENESS = 0xFF0062
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)
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type RECT struct {
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Left int32
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Top int32
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Right int32
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Bottom int32
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}
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type PAINTSTRUCT struct {
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HDC syscall.Handle
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Erase int32 // bool
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RcPaint RECT
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Restore int32 // bool
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IncUpdate int32 // bool
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rgbReserved [32]byte
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}
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type BITMAP struct {
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Type int32
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Width int32
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Height int32
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WidthBytes int32
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Planes uint16
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BitsPixel uint16
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Bits *byte
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}
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type BITMAPINFOHEADER struct {
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Size uint32
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Width int32
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Height int32
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Planes uint16
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BitCount uint16
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Compression uint32
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SizeImage uint32
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XPelsPerMeter int32
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YPelsPerMeter int32
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ClrUsed uint32
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ClrImportant uint32
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}
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type BITMAPINFO struct {
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Header BITMAPINFOHEADER
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Colors [1]RGBQUAD
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}
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type RGBQUAD struct {
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Blue byte
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Green byte
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Red byte
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Reserved byte
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}
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var (
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modgdi32 = syscall.NewLazyDLL("gdi32.dll")
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procGetDC = moduser32.NewProc("GetDC")
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procCreateCompatibleDC = modgdi32.NewProc("CreateCompatibleDC")
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procGetObject = modgdi32.NewProc("GetObjectW")
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procSelectObject = modgdi32.NewProc("SelectObject")
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procBeginPaint = moduser32.NewProc("BeginPaint")
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procEndPaint = moduser32.NewProc("EndPaint")
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procCreateCompatibleBitmap = modgdi32.NewProc("CreateCompatibleBitmap")
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procCreateDIBSection = modgdi32.NewProc("CreateDIBSection")
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procBitBlt = modgdi32.NewProc("BitBlt")
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)
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func GetDC(hwnd syscall.Handle) (hdc syscall.Handle) {
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r0, _, _ := syscall.Syscall(procGetDC.Addr(), 1, uintptr(hwnd), 0, 0)
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hdc = syscall.Handle(r0)
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return hdc
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}
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func CreateCompatibleDC(hwnd syscall.Handle) (hdc syscall.Handle) {
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r0, _, _ := syscall.Syscall(procCreateCompatibleDC.Addr(), 1, uintptr(hwnd), 0, 0)
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hdc = syscall.Handle(r0)
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return hdc
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}
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func GetObject(hgdiobj syscall.Handle, cbBuffer uintptr, object uintptr) (size uint32) {
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r0, _, _ := syscall.Syscall(procGetObject.Addr(), 3, uintptr(hgdiobj), uintptr(cbBuffer), object)
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size = uint32(r0)
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return size
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}
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func SelectObject(hdc syscall.Handle, hgdiobj syscall.Handle) syscall.Handle {
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r0, _, _ := syscall.Syscall(procSelectObject.Addr(), 2, uintptr(hdc), uintptr(hgdiobj), 0)
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return syscall.Handle(r0)
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}
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func BeginPaint(hwnd syscall.Handle, ps *PAINTSTRUCT) (hdc syscall.Handle){
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r0, _, _ := syscall.Syscall(procBeginPaint.Addr(), 2, uintptr(hwnd), uintptr(unsafe.Pointer(ps)), 0)
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hdc = syscall.Handle(r0)
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return
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}
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func EndPaint(hwnd syscall.Handle, ps *PAINTSTRUCT) bool {
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syscall.Syscall(procEndPaint.Addr(), 2, uintptr(hwnd), uintptr(unsafe.Pointer(ps)), 0)
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return true
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}
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func CreateCompatibleBitmap(hdc syscall.Handle, width, height uintptr) (hbitmap syscall.Handle) {
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r0, _, _ := syscall.Syscall(procCreateCompatibleBitmap.Addr(), 3, uintptr(hdc), uintptr(width), uintptr(height))
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return syscall.Handle(r0)
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}
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func CreateDIBSection(hdc syscall.Handle, pbmi *BITMAPINFO, iUsage uint, ppvBits uintptr, hSection uint32, dwOffset uint32) (hbitmap syscall.Handle) {
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r0, _, _ := syscall.Syscall6(procCreateDIBSection.Addr(), 6, uintptr(hdc), uintptr(unsafe.Pointer(pbmi)), uintptr(iUsage), ppvBits, uintptr(hSection), uintptr(dwOffset))
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return syscall.Handle(r0)
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}
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func BitBlt(hdc syscall.Handle, nXDest, nYDest, nWidth, nHeight int, hdcSrc syscall.Handle, nXSrc, nYSrc int, dwRop uint32) bool {
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r0, _, _ := syscall.Syscall9(procBitBlt.Addr(), 9, uintptr(hdc), uintptr(nXDest), uintptr(nYDest), uintptr(nWidth), uintptr(nHeight), uintptr(hdcSrc), uintptr(nXSrc), uintptr(nYSrc), uintptr(dwRop))
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return r0 != 0
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}
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