function gui.FontIcons(GL,source,ranges,size)
	local path = require"anima.path"
	local fontpath = path.chain(path.animapath(),"fonts","fontawesome-webfont.ttf")
	source = source or fontpath
	--ranges = ranges or ffi.new("ImWchar[3]",{0xf000,0xf2e0,0})
	ranges = ranges or ffi.new("ImWchar[3]",{0xf000,0xf1fb,0})
	size = size or 16
	local FAicons = {source=source,size=size,ranges=ranges}
	
	function FAicons:LoadFont()
		FAicons.atlas = ig.GetIO().Fonts
		local fnt_cfg = ig.ImFontConfig()
		fnt_cfg.PixelSnapH = true
		fnt_cfg.OversampleH = 1
		FAicons.font = FAicons.atlas:AddFontFromFileTTF(source, size, fnt_cfg,ranges)
		assert(FAicons.font~=nil,"could not load font!!!")
		--self.font:SetFallbackChar(self.ranges[0])
	end
	function FAicons:Button(cp,ID)
		--local glyph = self.font:FindGlyphNoFallback(cp + self.ranges[0])
		--if glyph==nil then print("bad codepoint",cp);return false end
		local glyph = self.font:FindGlyph(cp + self.ranges[0])
		ID = ID or tostring(cp)
		local ret = ig.ImageButton(ID,self.atlas.TexID, ig.ImVec2(self.size,self.size), ig.ImVec2(glyph.U0,glyph.V0), ig.ImVec2(glyph.U1,glyph.V1), ig.ImVec4(0,0,0,0), ig.ImVec4(1,1,1,1));
		return ret
	end
	
	function FAicons:GetCursors(cps)
		
		cps = cps or {hand=166,glass=2,glass_p=14,glass_m=16,pickcolor=0x01FB}--0x01FB}
		self.cursorcps = cps
		
		-- local img = ffi.new("unsigned char[?]",self.atlas.TexWidth * self.atlas.TexHeight * 4)
		-- gl.glBindTexture(glc.GL_TEXTURE_2D,ffi.cast("GLuint",self.atlas.TexID))
		-- gl.glGetTexImage(glc.GL_TEXTURE_2D,0,glc.GL_RGBA,glc.GL_UNSIGNED_BYTE,img);
		print("atlas data",FAicons.atlas.TexWidth,FAicons.atlas.TexHeight)
		--local imgp = ffi.new("unsigned char*[1]")
		local wi = ffi.new("int[1]")
		local hi = ffi.new("int[1]")
		--self.atlas:GetTexDataAsRGBA32(imgp,wi,hi)
		local atlas = ig.GetIO().Fonts
		
		local img = ffi.cast("unsigned char*",atlas.TexPixelsRGBA32)
		--print("wi,hi",wi[0],hi[0])
		--local img = imgp[0]

		local cursors = {}
		
		for k,cp in pairs(cps) do
			local glyph = self.font:FindGlyphNoFallback(cp + self.ranges[0])
			assert(glyph~=nil,"no glyph!! "..(cp + self.ranges[0]))
			local basex = math.floor(glyph.U0*self.atlas.TexWidth)
			local basey = math.floor(glyph.V0*self.atlas.TexHeight)
			local width = math.floor((glyph.U1-glyph.U0)*self.atlas.TexWidth)
			local height = math.floor((glyph.V1-glyph.V0)*self.atlas.TexHeight)
			print("glyph data",width,height,self.atlas.TexWidth,self.atlas.TexHeight)
			
			if not GL.SDL then --glfw
				local image = ffi.new("GLFWimage")
				image.width = width
				image.height = height
				image.pixels = ffi.new("unsigned char[?]",width*height*4)
				--
				for i=0,width-1 do
					for j = 0,height-1 do
						for p=0,3 do
							image.pixels[(i + j*width)*4 + p] = img[(basex+i + (basey+j)*self.atlas.TexWidth)*4 + p]
						end
					end
				end
				cursors[k] = glfw.glfwCreateCursor(image, 0, 0);
				assert(cursors[k]~=nil,"glfwCreateCursor failed")
			else --SDL
				--local surface = sdl.createRGBSurface(0, width, height, 32, 0, 0, 0, 0);
				local surface = sdl.C.SDL_CreateRGBSurfaceWithFormat(0, width, height, 32, sdl.PIXELFORMAT_ABGR8888)
				local pitch = surface.pitch
				--local formato = surface.format
				
				local pixels = ffi.cast("unsigned char*",surface.pixels)
				print("surface.pixels",pixels,pitch)
				-- print(formato.format,sdl.PIXELFORMAT_RGBA8888,formato.palette, formato.BitsPerPixel, formato.BytesPerPixel)
				-- for k,v in pairs(sdl) do
					-- if formato.format == v then print("format",k); break end
				-- end
				for i=0,width-1 do
					for j = 0,height-1 do
						for p=0,3 do
							--pixels[(i + j*width)*4 + p] = img[(basex+i + (basey+j)*self.atlas.TexWidth)*4 + p]
							pixels[i*4 + j*pitch + p] = img[(basex+i + (basey+j)*self.atlas.TexWidth)*4 + p]
						end
					end
				end
				cursors[k] = sdl.createColorCursor(surface,0,0)
				sdl.freeSurface(surface)
				assert(cursors[k]~=nil,"sdl.createColorCursor failed")
			end
		end

		return cursors
	end
	
	return FAicons
end --FAicons