OpenGL 3D立方体多纹理贴图.zip

package com.macrocheng.cubeopengl; import java.nio.ByteBuffer; import java.nio.ByteOrder; import java.nio.FloatBuffer; import java.nio.IntBuffer; import javax.microedition.khronos.egl.EGL10; import javax.microedition.khronos.egl.EGL11; import javax.microedition.khronos.egl.EGLConfig; import javax.microedition.khronos.egl.EGLContext; import javax.microedition.khronos.egl.EGLDisplay; import javax.microedition.khronos.egl.EGLSurface; import javax.microedition.khronos.opengles.GL10; import android.app.Activity; import android.content.Context; import android.graphics.Bitmap; import android.opengl.GLU; import android.view.SurfaceHolder; import android.view.SurfaceView; public abstract class GLTutorialBase extends SurfaceView implements SurfaceHolder.Callback, Runnable { protected EGLContext glContext; protected ViewAnimator animator; protected SurfaceHolder sHolder; protected Thread t; protected boolean running; int width; int height; boolean resize; int fps; /** * Make a direct NIO FloatBuffer from an array of floats * @param arr The array * @return The newly created FloatBuffer */ protected static FloatBuffer makeFloatBuffer(float[] arr) { ByteBuffer bb = ByteBuffer.allocateDirect(arr.length*4); bb.order(ByteOrder.nativeOrder()); FloatBuffer fb = bb.asFloatBuffer(); fb.put(arr); fb.position(0); return fb; } /** * Make a direct NIO IntBuffer from an array of ints * @param arr The array * @return The newly created IntBuffer */ protected static IntBuffer makeFloatBuffer(int[] arr) { ByteBuffer bb = ByteBuffer.allocateDirect(arr.length*4); bb.order(ByteOrder.nativeOrder()); IntBuffer ib = bb.asIntBuffer(); ib.put(arr); ib.position(0); return ib; } /** * Create a texture and send it to the graphics system * @param gl The GL object * @param bmp The bitmap of the texture * @param reverseRGB Should the RGB values be reversed? (necessary workaround for loading .pngs...) * @return The newly created identifier for the texture. */ protected static int loadTexture(GL10 gl, Bitmap bmp) { return loadTexture(gl, bmp, false); } /** * Create a texture and send it to the graphics system * @param gl The GL object * @param bmp The bitmap of the texture * @param reverseRGB Should the RGB values be reversed? (necessary workaround for loading .pngs...) * @return The newly created identifier for the texture. */ protected static int loadTexture(GL10 gl, Bitmap bmp, boolean reverseRGB) { ByteBuffer bb = ByteBuffer.allocateDirect(bmp.getHeight()*bmp.getWidth()*4); bb.order(ByteOrder.BIG_ENDIAN); IntBuffer ib = bb.asIntBuffer(); for (int y=bmp.getHeight()-1;y>-1;y--) for (int x=0;x<bmp.getWidth();x++) { int pix = bmp.getPixel(x,bmp.getHeight()-y-1); // Convert ARGB -> RGBA @SuppressWarnings("unused") byte alpha = (byte)((pix >> 24)&0xFF); byte red = (byte)((pix >> 16)&0xFF); byte green = (byte)((pix >> 8)&0xFF); byte blue = (byte)((pix)&0xFF); // It seems like alpha is currently broken in Android... ib.put(red << 24 | green << 16 | blue << 8 | 0xFF);//255-alpha); } ib.position(0); bb.position(0); int[] tmp_tex = new int[1]; gl.glGenTextures(1, tmp_tex, 0); int tex = tmp_tex[0]; gl.glBindTexture(GL10.GL_TEXTURE_2D, tex); gl.glTexImage2D(GL10.GL_TEXTURE_2D, 0, GL10.GL_RGBA, bmp.getWidth(), bmp.getHeight(), 0, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, bb); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); return tex; } /** * Constructor * @param c The View's context. */ public GLTutorialBase(Context c) { this(c, -1); } /** * Constructor for animated views * @param c The View's context * @param fps The frames per second for the animation. */ public GLTutorialBase(Context c, int fps) { super(c); sHolder = getHolder(); sHolder.addCallback(this); sHolder.setType(SurfaceHolder.SURFACE_TYPE_GPU); this.fps = fps; } @Override protected void onAttachedToWindow() { if (animator != null) { // If we're animated, start the animation animator.start(); } super.onAttachedToWindow(); } @Override protected void onDetachedFromWindow() { if (animator != null) { // If we're animated, stop the animation animator.stop(); } super.onDetachedFromWindow(); } public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { synchronized (this) { this.width = width; this.height = height; this.resize = true; } } public void surfaceCreated(SurfaceHolder holder) { t = new Thread(this); t.start(); } public void surfaceDestroyed(SurfaceHolder arg0) { running = false; try { t.join(); } catch (InterruptedException ex) {} t = null; } public void run() { // Much of this code is from GLSurfaceView in the Google API Demos. // I encourage those interested to look there for documentation. EGL10 egl = (EGL10)EGLContext.getEGL(); EGLDisplay dpy = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY); int[] version = new int[2]; egl.eglInitialize(dpy, version); int[] configSpec = { EGL10.EGL_RED_SIZE, 5, EGL10.EGL_GREEN_SIZE, 6, EGL10.EGL_BLUE_SIZE, 5, EGL10.EGL_DEPTH_SIZE, 16, EGL10.EGL_NONE }; EGLConfig[] configs = new EGLConfig[1]; int[] num_config = new int[1]; egl.eglChooseConfig(dpy, configSpec, configs, 1, num_config); EGLConfig config = configs[0]; EGLContext context = egl.eglCreateContext(dpy, config, EGL10.EGL_NO_CONTEXT, null); EGLSurface surface = egl.eglCreateWindowSurface(dpy, config, sHolder, null); egl.eglMakeCurrent(dpy, surface, surface, context); GL10 gl = (GL10)context.getGL(); init(gl); int delta = -1; if (fps > 0) { delta = 1000/fps; } long time = System.currentTimeMillis(); running = true; while (running) { int w, h; synchronized(this) { w = width; h = height; } if (System.currentTimeMillis()-time < delta) { try { Thread.sleep(System.currentTimeMillis()-time); } catch (InterruptedException ex) {} } drawFrame(gl, w, h); egl.eglSwapBuffers(dpy, surface); if (egl.eglGetError() == EGL11.EGL_CONTEXT_LOST) { Context c = getContext(); if (c instanceof Activity) { ((Activity)c).finish(); } } time = System.currentTimeMillis(); } egl.eglMakeCurrent(dpy, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_CONTEXT); egl.eglDestroySurface(dpy, surface); egl.eglDestroyContext(dpy, context); egl.eglTerminate(dpy); } private void drawFrame(GL10 gl, int w, int h) { if (resize) { resize(gl, w, h); resize = false; } drawFrame(gl); } protected void resize(GL10 gl, int w, int h) { gl.glMatrixMode(GL10.GL_PROJECTION); gl.glLoadIdentity(); gl.glViewport(0,0,w,h); GLU.gluPerspective(gl, 45.0f, ((float)w)/h, 1f, 100f); } protected void init(GL10 gl) {} protected abstract void drawFrame(GL10 gl); }