package com.seu.magicfilter.advanced;

import java.nio.ByteBuffer;

import android.opengl.GLES20;

import com.seu.magicfilter.utils.MagicFilterType;
import net.ossrs.yasea.R;

import com.seu.magicfilter.base.gpuimage.GPUImageFilter;

public class MagicSakuraFilter extends GPUImageFilter{
    private int[] mToneCurveTexture = {-1};
    private int mToneCurveTextureUniformLocation;
    private int mTexelHeightUniformLocation;
    private int mTexelWidthUniformLocation;
    
    public MagicSakuraFilter(){
        super(MagicFilterType.SAKURA, R.raw.romance);
    }

    @Override
    protected void onDestroy(){
        super.onDestroy();
        GLES20.glDeleteTextures(1, mToneCurveTexture, 0);
        mToneCurveTexture[0] = -1;
    }

    @Override
    protected void onDrawArraysAfter(){
        if (mToneCurveTexture[0] != -1){
            GLES20.glActiveTexture(GLES20.GL_TEXTURE3);
            GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
            GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
        }
    }

    @Override
    protected void onDrawArraysPre(){
        if (mToneCurveTexture[0] != -1){
            GLES20.glActiveTexture(GLES20.GL_TEXTURE3);
            GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mToneCurveTexture[0]);
            GLES20.glUniform1i(mToneCurveTextureUniformLocation, 3);
        }
    }

    @Override
    protected void onInit(){
        super.onInit();
        mToneCurveTextureUniformLocation = GLES20.glGetUniformLocation(getProgram(), "curve");
        mTexelWidthUniformLocation = GLES20.glGetUniformLocation(getProgram(), "texelWidthOffset");
        mTexelHeightUniformLocation = GLES20.glGetUniformLocation(getProgram(), "texelHeightOffset");
    }

    @Override
    protected void onInitialized(){
        super.onInitialized();
        runOnDraw(new Runnable(){
            public void run(){
                GLES20.glGenTextures(1, mToneCurveTexture, 0);
                GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mToneCurveTexture[0]);
                GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
                        GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
                GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
                        GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
                GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
                        GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
                GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
                        GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);                    
                byte[] arrayOfByte = new byte[1024];
                int[] arrayOfInt = { 95, 95, 96, 97, 97, 98, 99, 99, 100, 101, 101, 102, 103, 104, 104, 105, 106, 106, 107, 108, 108, 109, 110, 111, 111, 112, 113, 113, 114, 115, 115, 116, 117, 117, 118, 119, 120, 120, 121, 122, 122, 123, 124, 124, 125, 126, 127, 127, 128, 129, 129, 130, 131, 131, 132, 133, 133, 134, 135, 136, 136, 137, 138, 138, 139, 140, 140, 141, 142, 143, 143, 144, 145, 145, 146, 147, 147, 148, 149, 149, 150, 151, 152, 152, 153, 154, 154, 155, 156, 156, 157, 158, 159, 159, 160, 161, 161, 162, 163, 163, 164, 165, 165, 166, 167, 168, 168, 169, 170, 170, 171, 172, 172, 173, 174, 175, 175, 176, 177, 177, 178, 179, 179, 180, 181, 181, 182, 183, 184, 184, 185, 186, 186, 187, 188, 188, 189, 190, 191, 191, 192, 193, 193, 194, 195, 195, 196, 197, 197, 198, 199, 200, 200, 201, 202, 202, 203, 204, 204, 205, 206, 207, 207, 208, 209, 209, 210, 211, 211, 212, 213, 213, 214, 215, 216, 216, 217, 218, 218, 219, 220, 220, 221, 222, 223, 223, 224, 225, 225, 226, 227, 227, 228, 229, 229, 230, 231, 232, 232, 233, 234, 234, 235, 236, 236, 237, 238, 239, 239, 240, 241, 241, 242, 243, 243, 244, 245, 245, 246, 247, 248, 248, 249, 250, 250, 251, 252, 252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 };
                for (int i = 0; i < 256; i++)
                {
                  arrayOfByte[(i * 4)] = ((byte)arrayOfInt[i]);
                  arrayOfByte[(1 + i * 4)] = ((byte)arrayOfInt[i]);
                  arrayOfByte[(2 + i * 4)] = ((byte)arrayOfInt[i]);
                  arrayOfByte[(3 + i * 4)] = ((byte)arrayOfInt[i]);
                }
                GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, 256, 1, 0, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, ByteBuffer.wrap(arrayOfByte));
            }
        });
    }

    @Override
    public void onInputSizeChanged(int width, int height) {
        super.onInputSizeChanged(width, height);
        GLES20.glUniform1f(mTexelWidthUniformLocation, (1.0f / (float)width));
        GLES20.glUniform1f(mTexelHeightUniformLocation, (1.0f / (float)height));
    }
}
