001package net.minecraft.util;
002
003import cpw.mods.fml.relauncher.Side;
004import cpw.mods.fml.relauncher.SideOnly;
005import java.awt.image.BufferedImage;
006import java.io.File;
007import java.nio.IntBuffer;
008import java.text.DateFormat;
009import java.text.SimpleDateFormat;
010import java.util.Date;
011import javax.imageio.ImageIO;
012import org.lwjgl.BufferUtils;
013import org.lwjgl.opengl.GL11;
014import org.lwjgl.opengl.GL12;
015
016@SideOnly(Side.CLIENT)
017public class ScreenShotHelper
018{
019    private static final DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd_HH.mm.ss");
020    private static IntBuffer field_74293_b;
021    private static int[] field_74294_c;
022
023    /**
024     * Takes a screenshot and saves it to the screenshots directory. Returns the filename of the screenshot.
025     */
026    public static String saveScreenshot(File par0File, int par1, int par2)
027    {
028        return func_74292_a(par0File, (String)null, par1, par2);
029    }
030
031    public static String func_74292_a(File par0File, String par1Str, int par2, int par3)
032    {
033        try
034        {
035            File var4 = new File(par0File, "screenshots");
036            var4.mkdir();
037            int var5 = par2 * par3;
038
039            if (field_74293_b == null || field_74293_b.capacity() < var5)
040            {
041                field_74293_b = BufferUtils.createIntBuffer(var5);
042                field_74294_c = new int[var5];
043            }
044
045            GL11.glPixelStorei(GL11.GL_PACK_ALIGNMENT, 1);
046            GL11.glPixelStorei(GL11.GL_UNPACK_ALIGNMENT, 1);
047            field_74293_b.clear();
048            GL11.glReadPixels(0, 0, par2, par3, GL12.GL_BGRA, GL12.GL_UNSIGNED_INT_8_8_8_8_REV, field_74293_b);
049            field_74293_b.get(field_74294_c);
050            func_74289_a(field_74294_c, par2, par3);
051            BufferedImage var6 = new BufferedImage(par2, par3, 1);
052            var6.setRGB(0, 0, par2, par3, field_74294_c, 0, par2);
053            File var7;
054
055            if (par1Str == null)
056            {
057                var7 = func_74290_a(var4);
058            }
059            else
060            {
061                var7 = new File(var4, par1Str);
062            }
063
064            ImageIO.write(var6, "png", var7);
065            return "Saved screenshot as " + var7.getName();
066        }
067        catch (Exception var8)
068        {
069            var8.printStackTrace();
070            return "Failed to save: " + var8;
071        }
072    }
073
074    private static File func_74290_a(File par0File)
075    {
076        String var2 = dateFormat.format(new Date()).toString();
077        int var3 = 1;
078
079        while (true)
080        {
081            File var1 = new File(par0File, var2 + (var3 == 1 ? "" : "_" + var3) + ".png");
082
083            if (!var1.exists())
084            {
085                return var1;
086            }
087
088            ++var3;
089        }
090    }
091
092    private static void func_74289_a(int[] par0ArrayOfInteger, int par1, int par2)
093    {
094        int[] var3 = new int[par1];
095        int var4 = par2 / 2;
096
097        for (int var5 = 0; var5 < var4; ++var5)
098        {
099            System.arraycopy(par0ArrayOfInteger, var5 * par1, var3, 0, par1);
100            System.arraycopy(par0ArrayOfInteger, (par2 - 1 - var5) * par1, par0ArrayOfInteger, var5 * par1, par1);
101            System.arraycopy(var3, 0, par0ArrayOfInteger, (par2 - 1 - var5) * par1, par1);
102        }
103    }
104}