Adding upstream version 0.0~git20250520.a1d9079+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

gl/fn.go

@@ -0,0 +1,210 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gl
+
+import "unsafe"
+
+type call struct {
+	args     fnargs
+	parg     unsafe.Pointer
+	blocking bool
+}
+
+type fnargs struct {
+	fn glfn
+
+	a0 uintptr
+	a1 uintptr
+	a2 uintptr
+	a3 uintptr
+	a4 uintptr
+	a5 uintptr
+	a6 uintptr
+	a7 uintptr
+	a8 uintptr
+	a9 uintptr
+}
+
+type glfn int
+
+const (
+	glfnUNDEFINED glfn = iota
+	glfnActiveTexture
+	glfnAttachShader
+	glfnBindAttribLocation
+	glfnBindBuffer
+	glfnBindFramebuffer
+	glfnBindRenderbuffer
+	glfnBindTexture
+	glfnBindVertexArray
+	glfnBlendColor
+	glfnBlendEquation
+	glfnBlendEquationSeparate
+	glfnBlendFunc
+	glfnBlendFuncSeparate
+	glfnBufferData
+	glfnBufferSubData
+	glfnCheckFramebufferStatus
+	glfnClear
+	glfnClearColor
+	glfnClearDepthf
+	glfnClearStencil
+	glfnColorMask
+	glfnCompileShader
+	glfnCompressedTexImage2D
+	glfnCompressedTexSubImage2D
+	glfnCopyTexImage2D
+	glfnCopyTexSubImage2D
+	glfnCreateProgram
+	glfnCreateShader
+	glfnCullFace
+	glfnDeleteBuffer
+	glfnDeleteFramebuffer
+	glfnDeleteProgram
+	glfnDeleteRenderbuffer
+	glfnDeleteShader
+	glfnDeleteTexture
+	glfnDeleteVertexArray
+	glfnDepthFunc
+	glfnDepthRangef
+	glfnDepthMask
+	glfnDetachShader
+	glfnDisable
+	glfnDisableVertexAttribArray
+	glfnDrawArrays
+	glfnDrawElements
+	glfnEnable
+	glfnEnableVertexAttribArray
+	glfnFinish
+	glfnFlush
+	glfnFramebufferRenderbuffer
+	glfnFramebufferTexture2D
+	glfnFrontFace
+	glfnGenBuffer
+	glfnGenFramebuffer
+	glfnGenRenderbuffer
+	glfnGenTexture
+	glfnGenVertexArray
+	glfnGenerateMipmap
+	glfnGetActiveAttrib
+	glfnGetActiveUniform
+	glfnGetAttachedShaders
+	glfnGetAttribLocation
+	glfnGetBooleanv
+	glfnGetBufferParameteri
+	glfnGetError
+	glfnGetFloatv
+	glfnGetFramebufferAttachmentParameteriv
+	glfnGetIntegerv
+	glfnGetProgramInfoLog
+	glfnGetProgramiv
+	glfnGetRenderbufferParameteriv
+	glfnGetShaderInfoLog
+	glfnGetShaderPrecisionFormat
+	glfnGetShaderSource
+	glfnGetShaderiv
+	glfnGetString
+	glfnGetTexParameterfv
+	glfnGetTexParameteriv
+	glfnGetUniformLocation
+	glfnGetUniformfv
+	glfnGetUniformiv
+	glfnGetVertexAttribfv
+	glfnGetVertexAttribiv
+	glfnHint
+	glfnIsBuffer
+	glfnIsEnabled
+	glfnIsFramebuffer
+	glfnIsProgram
+	glfnIsRenderbuffer
+	glfnIsShader
+	glfnIsTexture
+	glfnLineWidth
+	glfnLinkProgram
+	glfnPixelStorei
+	glfnPolygonOffset
+	glfnReadPixels
+	glfnReleaseShaderCompiler
+	glfnRenderbufferStorage
+	glfnSampleCoverage
+	glfnScissor
+	glfnShaderSource
+	glfnStencilFunc
+	glfnStencilFuncSeparate
+	glfnStencilMask
+	glfnStencilMaskSeparate
+	glfnStencilOp
+	glfnStencilOpSeparate
+	glfnTexImage2D
+	glfnTexParameterf
+	glfnTexParameterfv
+	glfnTexParameteri
+	glfnTexParameteriv
+	glfnTexSubImage2D
+	glfnUniform1f
+	glfnUniform1fv
+	glfnUniform1i
+	glfnUniform1iv
+	glfnUniform2f
+	glfnUniform2fv
+	glfnUniform2i
+	glfnUniform2iv
+	glfnUniform3f
+	glfnUniform3fv
+	glfnUniform3i
+	glfnUniform3iv
+	glfnUniform4f
+	glfnUniform4fv
+	glfnUniform4i
+	glfnUniform4iv
+	glfnUniformMatrix2fv
+	glfnUniformMatrix3fv
+	glfnUniformMatrix4fv
+	glfnUseProgram
+	glfnValidateProgram
+	glfnVertexAttrib1f
+	glfnVertexAttrib1fv
+	glfnVertexAttrib2f
+	glfnVertexAttrib2fv
+	glfnVertexAttrib3f
+	glfnVertexAttrib3fv
+	glfnVertexAttrib4f
+	glfnVertexAttrib4fv
+	glfnVertexAttribPointer
+	glfnViewport
+
+	// ES 3.0 functions
+	glfnUniformMatrix2x3fv
+	glfnUniformMatrix3x2fv
+	glfnUniformMatrix2x4fv
+	glfnUniformMatrix4x2fv
+	glfnUniformMatrix3x4fv
+	glfnUniformMatrix4x3fv
+	glfnBlitFramebuffer
+	glfnUniform1ui
+	glfnUniform2ui
+	glfnUniform3ui
+	glfnUniform4ui
+	glfnUniform1uiv
+	glfnUniform2uiv
+	glfnUniform3uiv
+	glfnUniform4uiv
+)
+
+func goString(buf []byte) string {
+	for i, b := range buf {
+		if b == 0 {
+			return string(buf[:i])
+		}
+	}
+	panic("buf is not NUL-terminated")
+}
+
+func glBoolean(b bool) uintptr {
+	if b {
+		return TRUE
+	}
+	return FALSE
+}