Added size command and check

This commit is contained in:
Jan Christian Grünhage 2017-05-27 16:27:33 +02:00
parent 9be1e1d07c
commit 51b555464a
Signed by: jcgruenhage
GPG key ID: 321A67D9EE8BC3E1
3 changed files with 229 additions and 229 deletions

View file

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View file

@ -1,8 +1,8 @@
package main
import (
"math/rand"
"git.jcg.re/jcgruenhage/pixclient"
"math/rand"
"net"
)
@ -29,7 +29,7 @@ func main() {
} else {
panic("Illegal Direction!")
}
if counter%500 == 0 {
if counter%50 == 0 {
iterateColor(&r, &g, &b)
}
client.WritePixel(currentX, currentY, r, g, b, 255)

View file

@ -1,24 +1,33 @@
package pixclient
import (
"bufio"
"errors"
"net"
"strconv"
"strings"
)
type Client struct {
connection net.Conn
width int
height int
}
func Init(addr net.IP, port int) *Client {
var client Client
connection, err := net.Dial("tcp", addr.String()+":"+strconv.Itoa(port))
client.connection = connection
check(err)
client.connection = connection
client.Size()
return &client
}
func (Client *Client) WritePixel(x, y int, r, g, b, a byte) {
func (Client *Client) WritePixel(x, y int, r, g, b, a byte) error {
var bytes []byte
if x <= 0 || y <= 0 || x >= Client.width || y >= Client.height {
return errors.New("Pixel out of range.")
}
bytes = append(appendTwoDigitHex(appendTwoDigitHex(appendTwoDigitHex(appendTwoDigitHex(append(append(append(append(append(
bytes, []byte("PX ")...),
[]byte(strconv.FormatInt(int64(x), 10))...),
@ -35,7 +44,21 @@ func (Client *Client) WritePixel(x, y int, r, g, b, a byte) {
//
//Client.connection.Write([]byte(
// fmt.Sprintf("PX %d %d %X\n", x, y, []byte{r, g, b, a})))
return nil
}
func (Client *Client) Size() (int, int) {
Client.connection.Write([]byte("SIZE\n"))
reader := bufio.NewReader(Client.connection)
size, err := reader.ReadBytes('\n')
check(err)
sizeString := string(size)
sizeArray := strings.Split(sizeString, " ")
Client.width, _ = strconv.Atoi(sizeArray[1])
Client.height, _ = strconv.Atoi(sizeArray[2])
return Client.width, Client.height
}
func appendTwoDigitHex(bytes []byte, val byte) []byte {
if val < 0x10 {
bytes = append(bytes, []byte("0")...)