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ui/app,ui/app/internal/gl: work around golang.org/issue/34474

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Apparently, the (*syscall.LazyProc).Call does not keep its arguments
alive across calls.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2019-09-23 20:26:52 +01:00
parent 5c87437542
commit 5c9d35c186
3 changed files with 55 additions and 11 deletions
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ui/app/internal/gl/gl_windows.go
+28 -7
View File
@@ -4,6 +4,7 @@ package gl
import (
"math"
"runtime"
"syscall"
"unsafe"
@@ -101,7 +102,9 @@ func (f *Functions) BeginQuery(target Enum, query Query) {
}
func (c *Functions) BindAttribLocation(p Program, a Attrib, name string) {
cname := cString(name)
syscall.Syscall(_glBindAttribLocation.Addr(), 3, uintptr(p.V), uintptr(a), uintptr(unsafe.Pointer(&cname[0])))
c0 := &cname[0]
syscall.Syscall(_glBindAttribLocation.Addr(), 3, uintptr(p.V), uintptr(a), uintptr(unsafe.Pointer(c0)))
issue34474KeepAlive(c)
}
func (c *Functions) BindBuffer(target Enum, b Buffer) {
syscall.Syscall(_glBindBuffer.Addr(), 2, uintptr(target), uintptr(b.V), 0)
@@ -125,7 +128,9 @@ func (c *Functions) BufferData(target Enum, src []byte, usage Enum) {
if n := len(src); n == 0 {
syscall.Syscall6(_glBufferData.Addr(), 4, uintptr(target), 0, 0, uintptr(usage), 0, 0)
} else {
syscall.Syscall6(_glBufferData.Addr(), 4, uintptr(target), uintptr(n), uintptr(unsafe.Pointer(&src[0])), uintptr(usage), 0, 0)
s0 := &src[0]
syscall.Syscall6(_glBufferData.Addr(), 4, uintptr(target), uintptr(n), uintptr(unsafe.Pointer(s0)), uintptr(usage), 0, 0)
issue34474KeepAlive(s0)
}
}
func (c *Functions) CheckFramebufferStatus(target Enum) Enum {
@@ -287,7 +292,9 @@ func (c *Functions) GetString(pname Enum) string {
}
func (c *Functions) GetUniformLocation(p Program, name string) Uniform {
cname := cString(name)
u, _, _ := syscall.Syscall(_glGetUniformLocation.Addr(), 2, uintptr(p.V), uintptr(unsafe.Pointer(&cname[0])), 0)
c0 := &cname[0]
u, _, _ := syscall.Syscall(_glGetUniformLocation.Addr(), 2, uintptr(p.V), uintptr(unsafe.Pointer(c0)), 0)
issue34474KeepAlive(c)
return Uniform{int(u)}
}
func (c *Functions) InvalidateFramebuffer(target, attachment Enum) {
@@ -305,7 +312,9 @@ func (c *Functions) PixelStorei(pname Enum, param int32) {
syscall.Syscall(_glPixelStorei.Addr(), 2, uintptr(pname), uintptr(param), 0)
}
func (f *Functions) ReadPixels(x, y, width, height int, format, ty Enum, data []byte) {
syscall.Syscall6(_glReadPixels.Addr(), uintptr(x), uintptr(y), uintptr(width), uintptr(height), uintptr(format), uintptr(ty), uintptr(unsafe.Pointer(&data[0])))
d0 := &data[0]
syscall.Syscall6(_glReadPixels.Addr(), uintptr(x), uintptr(y), uintptr(width), uintptr(height), uintptr(format), uintptr(ty), uintptr(unsafe.Pointer(d0)))
issue34474KeepAlive(d0)
}
func (c *Functions) RenderbufferStorage(target, internalformat Enum, width, height int) {
syscall.Syscall6(_glRenderbufferStorage.Addr(), 4, uintptr(target), uintptr(internalformat), uintptr(width), uintptr(height), 0, 0)
@@ -315,17 +324,23 @@ func (c *Functions) Scissor(x, y, width, height int32) {
}
func (c *Functions) ShaderSource(s Shader, src string) {
var n uintptr = uintptr(len(src))
syscall.Syscall6(_glShaderSource.Addr(), 4, uintptr(s.V), 1, uintptr(unsafe.Pointer(&src)), uintptr(unsafe.Pointer(&n)), 0, 0)
psrc := &src
syscall.Syscall6(_glShaderSource.Addr(), 4, uintptr(s.V), 1, uintptr(unsafe.Pointer(psrc)), uintptr(unsafe.Pointer(&n)), 0, 0)
issue34474KeepAlive(psrc)
}
func (c *Functions) TexImage2D(target Enum, level int, internalFormat int, width, height int, format, ty Enum, data []byte) {
if len(data) == 0 {
syscall.Syscall9(_glTexImage2D.Addr(), 9, uintptr(target), uintptr(level), uintptr(internalFormat), uintptr(width), uintptr(height), 0, uintptr(format), uintptr(ty), 0)
} else {
syscall.Syscall9(_glTexImage2D.Addr(), 9, uintptr(target), uintptr(level), uintptr(internalFormat), uintptr(width), uintptr(height), 0, uintptr(format), uintptr(ty), uintptr(unsafe.Pointer(&data[0])))
d0 := &data[0]
syscall.Syscall9(_glTexImage2D.Addr(), 9, uintptr(target), uintptr(level), uintptr(internalFormat), uintptr(width), uintptr(height), 0, uintptr(format), uintptr(ty), uintptr(unsafe.Pointer(d0)))
issue34474KeepAlive(d0)
}
}
func (c *Functions) TexSubImage2D(target Enum, level int, x, y, width, height int, format, ty Enum, data []byte) {
syscall.Syscall9(_glTexSubImage2D.Addr(), 9, uintptr(target), uintptr(level), uintptr(x), uintptr(y), uintptr(width), uintptr(height), uintptr(format), uintptr(ty), uintptr(unsafe.Pointer(&data[0])))
d0 := &data[0]
syscall.Syscall9(_glTexSubImage2D.Addr(), 9, uintptr(target), uintptr(level), uintptr(x), uintptr(y), uintptr(width), uintptr(height), uintptr(format), uintptr(ty), uintptr(unsafe.Pointer(d0)))
issue34474KeepAlive(d0)
}
func (c *Functions) TexParameteri(target, pname Enum, param int) {
syscall.Syscall(_glTexParameteri.Addr(), 3, uintptr(target), uintptr(pname), uintptr(param))
@@ -364,3 +379,9 @@ func cString(s string) []byte {
copy(b, s)
return b
}
// issue34474KeepAlive calls runtime.KeepAlive as a
// workaround for golang.org/issue/34474.
func issue34474KeepAlive(v interface{}) {
runtime.KeepAlive(v)
}