I need some help!!
I am developing for Android, using OpenGL ES 1.0 with some 1.1 accessibility.
Okay so I have OpenGL load my textures when onSurfaceCreated is called.
Bitmap bitmap = BitmapFactory.decodeResource(mContext.getResources(),bitmaps[i]); glBindTexture(GL_TEXTURE_2D,textures[i]); glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_GENERATE_MIPMAP, GL11.GL_TRUE); glTexParameterx(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT); glTexParameterx(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT); glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE); texImage2D(GL_TEXTURE_2D,0,bitmap,0); bitmap.recycle();
The textures load great, everything works fine.
But I am giving the user the option to adjust the color/hue of some of the textures that are loaded.
The color change function loops through the image pixel by pixel and changes the color and hue using “Color.colorToHSV”
and then rebinds the adjusted image like such
localBitmap = changeHue(2, BitmapFactory.decodeResource(Wallpaper.this.getApplication().getApplicationContext().getResources(), Wallpaper.this.bitmaps)); glBindTexture(GL10.GL_TEXTURE_2D,textures); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, localBitmap, 0); localBitmap.recycle();
This works fine, but while it is adjusting the color of the image, it locks my GUI thread making my application to appear freeze for roughly 10 seconds while it makes the adjustments.
I have been playing around today on ways to prevent this lockup and speed up the time it takes to adjust the colors.
The images are only 512*512 and I am trying to make this color change happen immediately so there is no delay and no lock-up.
So I thought about using a thread/runnable.
I have used them before and they have significantly decreased the wait time for calculations to be performed, but I have never used them with OpenGL and from what I have heard OpenGL and multitasking can be a complicated thing.
I had made a thread to do the calculations when necessary then rebind the textures etc.
But it seems that I cannot rebind textures outside of the main OpenGL context even if I try to save the context to a variable and access it that way.
Basically I am trying to reduce/remove the wait time for the color change to take effect and move the color change function to a separate thread to prevent locking up my GUI.
Anyone care to shed some light on the best way for me to achieve this? Thanks!