/
opengl32.go
301 lines (257 loc) · 7.08 KB
/
opengl32.go
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// Copyright 2011 The win Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build windows
package win
import (
"syscall"
"unsafe"
)
// for second parameter of WglSwapLayerBuffers
const (
WGL_SWAP_MAIN_PLANE = (1 << 0)
WGL_SWAP_OVERLAY1 = (1 << 1)
WGL_SWAP_OVERLAY2 = (1 << 2)
WGL_SWAP_OVERLAY3 = (1 << 3)
WGL_SWAP_OVERLAY4 = (1 << 4)
WGL_SWAP_OVERLAY5 = (1 << 5)
WGL_SWAP_OVERLAY6 = (1 << 6)
WGL_SWAP_OVERLAY7 = (1 << 7)
WGL_SWAP_OVERLAY8 = (1 << 8)
WGL_SWAP_OVERLAY9 = (1 << 9)
WGL_SWAP_OVERLAY10 = (1 << 10)
WGL_SWAP_OVERLAY11 = (1 << 11)
WGL_SWAP_OVERLAY12 = (1 << 12)
WGL_SWAP_OVERLAY13 = (1 << 13)
WGL_SWAP_OVERLAY14 = (1 << 14)
WGL_SWAP_OVERLAY15 = (1 << 15)
WGL_SWAP_UNDERLAY1 = (1 << 16)
WGL_SWAP_UNDERLAY2 = (1 << 17)
WGL_SWAP_UNDERLAY3 = (1 << 18)
WGL_SWAP_UNDERLAY4 = (1 << 19)
WGL_SWAP_UNDERLAY5 = (1 << 20)
WGL_SWAP_UNDERLAY6 = (1 << 21)
WGL_SWAP_UNDERLAY7 = (1 << 22)
WGL_SWAP_UNDERLAY8 = (1 << 23)
WGL_SWAP_UNDERLAY9 = (1 << 24)
WGL_SWAP_UNDERLAY10 = (1 << 25)
WGL_SWAP_UNDERLAY11 = (1 << 26)
WGL_SWAP_UNDERLAY12 = (1 << 27)
WGL_SWAP_UNDERLAY13 = (1 << 28)
WGL_SWAP_UNDERLAY14 = (1 << 29)
WGL_SWAP_UNDERLAY15 = (1 << 30)
)
type (
HGLRC HANDLE
)
type LAYERPLANEDESCRIPTOR struct {
NSize uint16
NVersion uint16
DwFlags uint32
IPixelType uint8
CColorBits uint8
CRedBits uint8
CRedShift uint8
CGreenBits uint8
CGreenShift uint8
CBlueBits uint8
CBlueShift uint8
CAlphaBits uint8
CAlphaShift uint8
CAccumBits uint8
CAccumRedBits uint8
CAccumGreenBits uint8
CAccumBlueBits uint8
CAccumAlphaBits uint8
CDepthBits uint8
CStencilBits uint8
CAuxBuffers uint8
ILayerType uint8
BReserved uint8
CrTransparent COLORREF
}
type POINTFLOAT struct {
X, Y float32
}
type GLYPHMETRICSFLOAT struct {
GmfBlackBoxX float32
GmfBlackBoxY float32
GmfptGlyphOrigin POINTFLOAT
GmfCellIncX float32
GmfCellIncY float32
}
var (
// Library
lib uintptr
// Functions
wglCopyContext uintptr
wglCreateContext uintptr
wglCreateLayerContext uintptr
wglDeleteContext uintptr
wglDescribeLayerPlane uintptr
wglGetCurrentContext uintptr
wglGetCurrentDC uintptr
wglGetLayerPaletteEntries uintptr
wglGetProcAddress uintptr
wglMakeCurrent uintptr
wglRealizeLayerPalette uintptr
wglSetLayerPaletteEntries uintptr
wglShareLists uintptr
wglSwapLayerBuffers uintptr
wglUseFontBitmaps uintptr
wglUseFontOutlines uintptr
)
func init() {
// Library
lib = MustLoadLibrary("opengl32.dll")
// Functions
wglCopyContext = MustGetProcAddress(lib, "wglCopyContext")
wglCreateContext = MustGetProcAddress(lib, "wglCreateContext")
wglCreateLayerContext = MustGetProcAddress(lib, "wglCreateLayerContext")
wglDeleteContext = MustGetProcAddress(lib, "wglDeleteContext")
wglDescribeLayerPlane = MustGetProcAddress(lib, "wglDescribeLayerPlane")
wglGetCurrentContext = MustGetProcAddress(lib, "wglGetCurrentContext")
wglGetCurrentDC = MustGetProcAddress(lib, "wglGetCurrentDC")
wglGetLayerPaletteEntries = MustGetProcAddress(lib, "wglGetLayerPaletteEntries")
wglGetProcAddress = MustGetProcAddress(lib, "wglGetProcAddress")
wglMakeCurrent = MustGetProcAddress(lib, "wglMakeCurrent")
wglRealizeLayerPalette = MustGetProcAddress(lib, "wglRealizeLayerPalette")
wglSetLayerPaletteEntries = MustGetProcAddress(lib, "wglSetLayerPaletteEntries")
wglShareLists = MustGetProcAddress(lib, "wglShareLists")
wglSwapLayerBuffers = MustGetProcAddress(lib, "wglSwapLayerBuffers")
wglUseFontBitmaps = MustGetProcAddress(lib, "wglUseFontBitmapsW")
wglUseFontOutlines = MustGetProcAddress(lib, "wglUseFontOutlinesW")
}
func WglCopyContext(hglrcSrc, hglrcDst HGLRC, mask uint) bool {
ret, _, _ := syscall.Syscall(wglCopyContext, 3,
uintptr(hglrcSrc),
uintptr(hglrcDst),
uintptr(mask))
return ret != 0
}
func WglCreateContext(hdc HDC) HGLRC {
ret, _, _ := syscall.Syscall(wglCreateContext, 1,
uintptr(hdc),
0,
0)
return HGLRC(ret)
}
func WglCreateLayerContext(hdc HDC, iLayerPlane int) HGLRC {
ret, _, _ := syscall.Syscall(wglCreateLayerContext, 2,
uintptr(hdc),
uintptr(iLayerPlane),
0)
return HGLRC(ret)
}
func WglDeleteContext(hglrc HGLRC) bool {
ret, _, _ := syscall.Syscall(wglDeleteContext, 1,
uintptr(hglrc),
0,
0)
return ret != 0
}
func WglDescribeLayerPlane(hdc HDC, iPixelFormat, iLayerPlane int, nBytes uint8, plpd *LAYERPLANEDESCRIPTOR) bool {
ret, _, _ := syscall.Syscall6(wglDescribeLayerPlane, 5,
uintptr(hdc),
uintptr(iPixelFormat),
uintptr(iLayerPlane),
uintptr(nBytes),
uintptr(unsafe.Pointer(plpd)),
0)
return ret != 0
}
func WglGetCurrentContext() HGLRC {
ret, _, _ := syscall.Syscall(wglGetCurrentContext, 0,
0,
0,
0)
return HGLRC(ret)
}
func WglGetCurrentDC() HDC {
ret, _, _ := syscall.Syscall(wglGetCurrentDC, 0,
0,
0,
0)
return HDC(ret)
}
func WglGetLayerPaletteEntries(hdc HDC, iLayerPlane, iStart, cEntries int, pcr *COLORREF) int {
ret, _, _ := syscall.Syscall6(wglGetLayerPaletteEntries, 5,
uintptr(hdc),
uintptr(iLayerPlane),
uintptr(iStart),
uintptr(cEntries),
uintptr(unsafe.Pointer(pcr)),
0)
return int(ret)
}
func WglGetProcAddress(lpszProc *byte) uintptr {
ret, _, _ := syscall.Syscall(wglGetProcAddress, 1,
uintptr(unsafe.Pointer(lpszProc)),
0,
0)
return uintptr(ret)
}
func WglMakeCurrent(hdc HDC, hglrc HGLRC) bool {
ret, _, _ := syscall.Syscall(wglMakeCurrent, 2,
uintptr(hdc),
uintptr(hglrc),
0)
return ret != 0
}
func WglRealizeLayerPalette(hdc HDC, iLayerPlane int, bRealize bool) bool {
ret, _, _ := syscall.Syscall(wglRealizeLayerPalette, 3,
uintptr(hdc),
uintptr(iLayerPlane),
uintptr(BoolToBOOL(bRealize)))
return ret != 0
}
func WglSetLayerPaletteEntries(hdc HDC, iLayerPlane, iStart, cEntries int, pcr *COLORREF) int {
ret, _, _ := syscall.Syscall6(wglSetLayerPaletteEntries, 5,
uintptr(hdc),
uintptr(iLayerPlane),
uintptr(iStart),
uintptr(cEntries),
uintptr(unsafe.Pointer(pcr)),
0)
return int(ret)
}
func WglShareLists(hglrc1, hglrc2 HGLRC) bool {
ret, _, _ := syscall.Syscall(wglShareLists, 2,
uintptr(hglrc1),
uintptr(hglrc2),
0)
return ret != 0
}
func WglSwapLayerBuffers(hdc HDC, fuPlanes uint) bool {
ret, _, _ := syscall.Syscall(wglSwapLayerBuffers, 2,
uintptr(hdc),
uintptr(fuPlanes),
0)
return ret != 0
}
func WglUseFontBitmaps(hdc HDC, first, count, listbase uint32) bool {
ret, _, _ := syscall.Syscall6(wglUseFontBitmaps, 4,
uintptr(hdc),
uintptr(first),
uintptr(count),
uintptr(listbase),
0,
0)
return ret != 0
}
func WglUseFontOutlines(hdc HDC, first, count, listbase uint32, deviation, extrusion float32, format int, pgmf *GLYPHMETRICSFLOAT) bool {
ret, _, _ := syscall.Syscall12(wglUseFontBitmaps, 8,
uintptr(hdc),
uintptr(first),
uintptr(count),
uintptr(listbase),
uintptr(deviation),
uintptr(extrusion),
uintptr(format),
uintptr(unsafe.Pointer(pgmf)),
0,
0,
0,
0)
return ret != 0
}