안드로이드 android 오픈지엘 OpenGL ES 2.0 다시 그리기

 

 

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출처: http://gogorchg.tistory.com/entry/Android-Opengl-es-20-%EB%8B%A4%EC%8B%9C-%EA%B7%B8%EB%A6%AC%EA%B8%B0

 

 

ByteBuffer pixelBuffer;
 
void storePixels() {
   try {
     GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, fbuf);
     pixelBuffer = ByteBuffer.allocateDirect(width * height * 4).order(ByteOrder.nativeOrder());
     GLES20.glReadPixels(0, 0, width, height, GL20.GL_RGBA, GL20.GL_UNSIGNED_BYTE, pixelBuffer);
     GLES20.glBindFrameBuffer(GLES20.GL_FRAMEBUFFER, 0);
     gfx.checkGlError("store Pixels");
   }catch (OutOfMemoryError e) {
     pixelBuffer = null;
   }
 }
 
void redrawPixels() {
   GLES20.glBindFramebuffer(GL20.GL_FRAMEBUFFER, fbuf);
   int[] texId = new int[1];
   GLES20.glGenTextures(1, texId, 0);
   int bufferTex = texId[0];
   GLES20.glBindTexture(GL20.GL_TEXTURE_2D, bufferTex);
   GLES20.glTexParameterf(GL20.GL_TEXTURE_2D, GL20.GL_TEXTURE_MAG_FILTER, GL20.GL_LINEAR);
   GLES20.glTexParameterf(GL20.GL_TEXTURE_2D, GL20.GL_TEXTURE_MIN_FILTER, GL20.GL_LINEAR);
   GLES20.glTexParameterf(GL20.GL_TEXTURE_2D, GL20.GL_TEXTURE_WRAP_S, repeatX ? GL20.GL_REPEAT
     : GL20.GL_CLAMP_TO_EDGE);
   GLES20.glTexParameterf(GL20.GL_TEXTURE_2D, GL20.GL_TEXTURE_WRAP_T, repeatY ? GL20.GL_REPEAT
     : GL20.GL_CLAMP_TO_EDGE);
   GLES20.glTexImage2D(GL20.GL_TEXTURE_2D, 0, GL20.GL_RGBA, width, height, 0, GL20.GL_RGBA, GL20.GL_UNSIGNED_BYTE, pixelBuffer);
   gfx.drawTexture(bufferTex, width, height, Transform.IDENTITY, width/2, height/2, false, false, 1);
   GLES20.glDeleteTextures(1, IntBuffer.wrap(new int[] {bufferTex}));
   pixelBuffer = null;
   GLES20.glBindFrameBuffer(GLES20.GL_FRAMEBUFFER, 0);
 }

 

출처 : http://stackoverflow.com/questions/7208255/android-opengl-es-2-0-glreadpixels-and-glteximage2d-drawing-a-black-textur
 
우선 확인은 못해봤는데요.

저장해 두면 유용하게 쓸 듯해서... ㅋㅋ 

 

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