133 lines
3.4 KiB
Go
133 lines
3.4 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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DIB_PAL_COLORS = 1
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DIB_RGB_COLORS = 0
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SRCCOPY = 0xCC0020
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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 uint32
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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 = loadDll("gdi32.dll")
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procGetDC = getSysProcAddr(moduser32, "GetDC")
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procCreateCompatibleDC = getSysProcAddr(modgdi32, "CreateCompatibleDC")
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procGetObject = getSysProcAddr(modgdi32, "GetObjectW")
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procSelectObject = getSysProcAddr(modgdi32, "SelectObject")
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procBeginPaint = getSysProcAddr(moduser32, "BeginPaint")
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procEndPaint = getSysProcAddr(moduser32, "EndPaint")
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procCreateCompatibleBitmap = getSysProcAddr(modgdi32, "CreateCompatibleBitmap")
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procCreateDIBSection = getSysProcAddr(modgdi32, "CreateDIBSection")
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procBitBlt = getSysProcAddr(modgdi32, "BitBlt")
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)
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func GetDC(hwnd uint32) (hdc uint32) {
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r0, _, _ := syscall.Syscall(procGetDC, 1, uintptr(hwnd), 0, 0)
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hdc = uint32(r0)
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return hdc
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}
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func CreateCompatibleDC(hwnd uint32) (hdc uint32) {
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r0, _, _ := syscall.Syscall(procCreateCompatibleDC, 1, uintptr(hwnd), 0, 0)
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hdc = uint32(r0)
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return hdc
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}
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func GetObject(hgdiobj uint32, cbBuffer int, object uintptr) (size uint32) {
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r0, _, _ := syscall.Syscall(procGetObject, 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 uint32, hgdiobj uint32) uint32 {
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r0, _, _ := syscall.Syscall(procSelectObject, 2, uintptr(hdc), uintptr(hgdiobj), 0)
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return uint32(r0)
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}
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func BeginPaint(hwnd uint32, ps *PAINTSTRUCT) (hdc uint32) {
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r0, _, _ := syscall.Syscall(procBeginPaint, 2, uintptr(hwnd), uintptr(unsafe.Pointer(ps)), 0)
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hdc = uint32(r0)
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return hdc
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}
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func EndPaint(hwnd uint32, ps *PAINTSTRUCT) bool {
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syscall.Syscall(procEndPaint, 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 uint32, width, height int) (hbitmap uint32) {
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r0, _, _ := syscall.Syscall(procCreateCompatibleBitmap, 3, uintptr(hdc), uintptr(width), uintptr(height))
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return uint32(r0)
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}
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func CreateDIBSection(hdc uint32, pbmi *BITMAPINFO, iUsage uint, ppvBits uintptr, hSection uint32, dwOffset uint32) (hbitmap uint32) {
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r0, _, _ := syscall.Syscall6(procCreateDIBSection, 6, uintptr(hdc), uintptr(unsafe.Pointer(pbmi)), uintptr(iUsage), ppvBits, uintptr(hSection), uintptr(dwOffset))
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return uint32(r0)
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}
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func BitBlt(hdc uint32, nXDest, nYDest, nWidth, nHeight int, hdcSrc uint32, nXSrc, nYSrc int, dwRop uint32) bool {
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r0, _, _ := syscall.Syscall9(procBitBlt, 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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