wear/src/main/java/jp/sfjp/gokigen/a01c/liveview/glview/GokigenGLUtilities.kt

   1 package jp.sfjp.gokigen.a01c.liveview.glview
   2
   3 import android.content.Context
   4 import android.graphics.Bitmap
   5 import android.graphics.BitmapFactory
   6 import android.opengl.GLUtils
   7 import java.io.IOException
   8 import java.io.InputStream
   9 import javax.microedition.khronos.opengles.GL10
  10
  11 class GokigenGLUtilities(private val mContext: Context)
  12 {
  13
  14     /**
  15      * テクスチャの準備
  16      *
  17      *
  18      */
  19     fun prepareTexture(gl: GL10?, resourceId: Int): Int
  20     {
  21         try
  22         {
  23             /*
  24              * Create our texture. This has to be done each time the
  25              * surface is created.
  26              */
  27             val textures = IntArray(1)
  28             gl?.glGenTextures(1, textures, 0)
  29             gl?.glBindTexture(GL10.GL_TEXTURE_2D, textures[0])
  30             gl?.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST.toFloat())
  31             gl?.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR.toFloat())
  32             gl?.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE.toFloat())
  33             gl?.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE.toFloat())
  34             gl?.glTexEnvf(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE, GL10.GL_REPLACE.toFloat())
  35
  36             /////////////////////////////////////////////////////////////////////
  37             val inputStream: InputStream = mContext.resources.openRawResource(resourceId)
  38             val bitmap: Bitmap
  39             bitmap = try
  40             {
  41                 BitmapFactory.decodeStream(inputStream)
  42             }
  43             finally
  44             {
  45                 try
  46                 {
  47                     inputStream.close()
  48                 }
  49                 catch (e: IOException)
  50                 {
  51                     e.printStackTrace()
  52                 }
  53             }
  54             try
  55             {
  56                 GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0)
  57                 bitmap.recycle()
  58             }
  59             catch (ex: Exception)
  60             {
  61                 ex.printStackTrace()
  62             }
  63             return textures[0]
  64         }
  65         catch (e : Exception)
  66         {
  67             e.printStackTrace()
  68             return -1
  69         }
  70     }
  71 }