Golang C.GLenum类(方法)实例源码

// void glGetRenderbufferParameteriv(GLenum target, GLenum pname, GLint* params);
func GetRenderbufferParameteriv(target, pname GLenum, params []int32) {
	if len(params) == 0 {
		panic(ErrorInputSize)
	}

	C.glGetRenderbufferParameteriv(C.GLenum(target), C.GLenum(pname), (*C.GLint)(&params[0]))
}

func GetRenderbufferParameteriv(
	target Enum, pname Enum, params *int32) {
	C.glGetRenderbufferParameteriv(
		C.GLenum(target),
		C.GLenum(pname),
		(*C.GLint)(params))
}

func TexImage2D(target TextureTarget, level int, internalformat InternalFormat, width, height int, format TextureFormat, datatype DataType, pixels []uint8) {
	if pixels != nil {
		C.glTexImage2D(C.GLenum(target), C.GLint(level), C.GLint(internalformat), C.GLsizei(width), C.GLsizei(height), 0, C.GLenum(format), C.GLenum(datatype), unsafe.Pointer(&pixels[0]))
	} else {
		C.glTexImage2D(C.GLenum(target), C.GLint(level), C.GLint(internalformat), C.GLsizei(width), C.GLsizei(height), 0, C.GLenum(format), C.GLenum(datatype), unsafe.Pointer(nil))
	}
}

// void glGetRenderbufferParameteriv(GLenum target, GLenum pname, GLint* params);
func GetRenderbufferParameteriv(target, pname GLenum, params []int32) {
	if len(params) == 0 {
		panic("Invalid params size")
	}

	C.glGetRenderbufferParameteriv(C.GLenum(target), C.GLenum(pname), (*C.GLint)(&params[0]))
}

func BlendEquationSeparate(
	modeRGB Enum, modeAlpha Enum) {
	C.glBlendEquationSeparate(
		C.GLenum(modeRGB),
		C.GLenum(modeAlpha))

}

func TexParameterf(
	target Enum, pname Enum, param float32) {
	C.glTexParameterf(
		C.GLenum(target),
		C.GLenum(pname),
		C.GLfloat(param))
}

func TexParameteriv(
	target Enum, pname Enum, params *int32) {
	C.glTexParameteriv(
		C.GLenum(target),
		C.GLenum(pname),
		(*C.GLint)(params))
}

func TexParameterfv(
	target Enum, pname Enum, params *float32) {
	C.glTexParameterfv(
		C.GLenum(target),
		C.GLenum(pname),
		(*C.GLfloat)(params))
}

func TexParameteri(
	target Enum, pname Enum, param int32) {
	C.glTexParameteri(
		C.GLenum(target),
		C.GLenum(pname),
		C.GLint(param))
}

func CopyTexImage2D(target uint, level int, internalformat uint,
	x, y, width, height, border int) {
	C.glCopyTexImage2D(
		C.GLenum(target), C.GLint(level), C.GLenum(internalformat),
		C.GLint(x), C.GLint(y), C.GLsizei(width), C.GLsizei(height),
		C.GLint(border))
}

func StencilOp(
	fail Enum, zfail Enum, zpass Enum) {
	C.glStencilOp(
		C.GLenum(fail),
		C.GLenum(zfail),
		C.GLenum(zpass))
}

func BlendFunc(
	sfactor Enum, dfactor Enum) {
	C.glBlendFunc(
		C.GLenum(sfactor),
		C.GLenum(dfactor))

}

func GetShaderPrecisionFormat(shadertype, precisiontype uint) (
	range_ int32, precision int32) {
	C.glGetShaderPrecisionFormat(
		C.GLenum(shadertype), C.GLenum(precisiontype),
		(*C.GLint)(&range_), (*C.GLint)(&precision))
	return
}

// Set calls glBufferData with appropriate arguments to load the data pointed to by data into the buffer. usage is passed along verbatim. targ is used for binding and it should most likely be ARRAY_BUFFER.
func (buf *Buffer) Set(targ int, data interface{}, usage int) {
	buf.Bind(targ)
	p, t, ts, s := toCtype(data)
	C.glBufferData(C.GLenum(targ), C.GLsizeiptr(s), p, C.GLenum(usage))
	buf.t = t
	buf.ts = ts
	buf.Unbind(targ)
}

func CompressedTexImage2D(target uint, level int, internalformat uint,
	width, height, border, imageSize int, data Void) {
	C.glCompressedTexImage2D(
		C.GLenum(target), C.GLint(level), C.GLenum(internalformat),
		C.GLsizei(width), C.GLsizei(height),
		C.GLint(border), C.GLsizei(imageSize),
		unsafe.Pointer(data))
}

func TexSubImage2D(target uint, level, xoffset, yoffset, width, height int,
	format, type_ uint, pixels Void) {

	C.glTexSubImage2D(C.GLenum(target), C.GLint(level),
		C.GLint(xoffset), C.GLint(yoffset), C.GLsizei(width), C.GLsizei(height),
		C.GLenum(format), C.GLenum(type_),
		unsafe.Pointer(pixels))
}

func GetFramebufferAttachmentParameteriv(
	target, attachment, pname uint, params []int32) []int32 {
	C.glGetFramebufferAttachmentParameteriv(
		C.GLenum(target), C.GLenum(attachment),
		C.GLenum(pname), (*C.GLint)(&params[0]))
	return params

}

func GetFramebufferAttachmentParameteriv(
	target Enum, attachment Enum, pname Enum, params *int32) {
	C.glGetFramebufferAttachmentParameteriv(
		C.GLenum(target),
		C.GLenum(attachment),
		C.GLenum(pname),
		(*C.GLint)(params))
}

func StencilFuncSeparate(
	face Enum, func_ Enum, ref int32, mask uint32) {
	C.glStencilFuncSeparate(
		C.GLenum(face),
		C.GLenum(func_),
		C.GLint(ref),
		C.GLuint(mask))
}

func CompressedTexSubImage2D(target uint, level, xoffset, yoffset int,
	width, height int, format uint, imageSize int, data Void) {
	C.glCompressedTexSubImage2D(
		C.GLenum(target), C.GLint(level),
		C.GLint(xoffset), C.GLint(yoffset),
		C.GLsizei(width), C.GLsizei(height),
		C.GLenum(format), C.GLsizei(imageSize),
		unsafe.Pointer(data))
}