我是opengl ES的新手，我想在TextureView上渲染开放式视图。
以下是立方体绘图的示例open-gl示例https://gist.github.com/ybakos/4151696 但 当我试图使用TextureView绘制相同的立方体时，
我无法绘制那个立方体。 指导我如何使用TextureView绘制opengl多维数据集。
以下是示例代码::
public class DemoGraphicGlctivity extends Activity implements TextureView.SurfaceTextureListener {
private RenderThread mRenderThread;
private TextureView mTextureView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mTextureView = new TextureView(this);
mTextureView.setSurfaceTextureListener(this);
setContentView(mTextureView, new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, 400));
}
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
mRenderThread = new RenderThread(getResources(), surface, DemoGraphicGlctivity.this);
mRenderThread.start();
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
mRenderThread.finish();
try {
mRenderThread.join();
} catch (InterruptedException e) {
Log.e(RenderThread.LOG_TAG, "Could not wait for render thread");
}
return true;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
private static class RenderThread extends Thread {
private static final String LOG_TAG = "GLTextureView";
static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
static final int EGL_OPENGL_ES2_BIT = 4;
private volatile boolean mFinished;
private final Resources mResources;
private final SurfaceTexture mSurface;
private EGL10 mEgl;
private EGLDisplay mEglDisplay;
private EGLConfig mEglConfig;
private EGLContext mEglContext;
private EGLSurface mEglSurface;
private GL mGL;
Context context;
RenderThread(Resources resources, SurfaceTexture surface, Context mContext) {
mResources = resources;
mSurface = surface;
context = mContext;
}
@Override
public void run() {
initGL();
// vertices
FloatBuffer vertexBuffer = ByteBuffer
.allocateDirect(CubeConstant.vertices.length * 4)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
vertexBuffer.put(CubeConstant.vertices);
vertexBuffer.position(0);
// texture map
FloatBuffer textureBuffer = ByteBuffer
.allocateDirect(CubeConstant.texture.length * 4)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
textureBuffer.put(CubeConstant.texture);
textureBuffer.position(0);
// indices
ByteBuffer indexBuffer = ByteBuffer.allocateDirect(CubeConstant.indices.length);
indexBuffer.put(CubeConstant.indices);
indexBuffer.position(0);
int texture = loadTexture(R.drawable.receipt_bg);
//int program = buildProgram(sSimpleVS, sSimpleFS);
int program = ShaderHelper
.linkProgram(ShaderHelper
.compileVertexShader(TextResourceReader
.readTextFileFromResource(context,
R.raw.cube_vertex)), ShaderHelper
.compileFragmentShader(TextResourceReader
.readTextFileFromResource(context,
R.raw.cube_fragment)));
int aPositionLocation = glGetAttribLocation(program, "a_Position");
checkGlError();
int aTextureCoordinatesLocation = glGetAttribLocation(program, "a_TextureCoordinates");
checkGlError();
glBindTexture(GL_TEXTURE_2D, texture);
checkGlError();
glUseProgram(program);
checkGlError();
glVertexAttribPointer(aPositionLocation, 3 , GL_FLOAT, false , 0, vertexBuffer);
checkGlError();
vertexBuffer.position(0);
glVertexAttribPointer(aPositionLocation, 3 , GL_FLOAT, false , 0, vertexBuffer);
glEnableVertexAttribArray(aPositionLocation);
textureBuffer.position(0);
glVertexAttribPointer(aTextureCoordinatesLocation, 2, GL_FLOAT, false, 0, textureBuffer);
glEnableVertexAttribArray(aTextureCoordinatesLocation);
checkGlError();
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
checkGlError();
while (!mFinished) {
checkCurrent();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
checkGlError();
glBindTexture(GL_TEXTURE_2D, texture);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, indexBuffer);
if (!mEgl.eglSwapBuffers(mEglDisplay, mEglSurface)) {
throw new RuntimeException("Cannot swap buffers");
}
checkEglError();
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
// Ignore
}
}
finishGL();
}
private int loadTexture(int resource) {
int[] textures = new int[1];
glActiveTexture(GL_TEXTURE0);
glGenTextures(1, textures, 0);
checkGlError();
int texture = textures[0];
glBindTexture(GL_TEXTURE_2D, texture);
checkGlError();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
Bitmap bitmap = BitmapFactory.decodeResource(mResources, resource);
GLUtils.texImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap, GL_UNSIGNED_BYTE, 0);
checkGlError();
bitmap.recycle();
return texture;
}
private void checkEglError() {
int error = mEgl.eglGetError();
if (error != EGL10.EGL_SUCCESS) {
Log.w(LOG_TAG, "EGL error = 0x" + Integer.toHexString(error));
}
}
private static void checkGlError() {
int error = glGetError();
if (error != GL_NO_ERROR) {
Log.w(LOG_TAG, "GL error = 0x" + Integer.toHexString(error));
}
}
private void finishGL() {
mEgl.eglDestroyContext(mEglDisplay, mEglContext);
mEgl.eglDestroySurface(mEglDisplay, mEglSurface);
}
private void checkCurrent() {
if (!mEglContext.equals(mEgl.eglGetCurrentContext()) ||
!mEglSurface.equals(mEgl.eglGetCurrentSurface(EGL10.EGL_DRAW))) {
if (!mEgl.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext)) {
throw new RuntimeException("eglMakeCurrent failed "
+ GLUtils.getEGLErrorString(mEgl.eglGetError()));
}
}
}
private void initGL() {
mEgl = (EGL10) EGLContext.getEGL();
mEglDisplay = mEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
if (mEglDisplay == EGL10.EGL_NO_DISPLAY) {
throw new RuntimeException("eglGetDisplay failed "
+ GLUtils.getEGLErrorString(mEgl.eglGetError()));
}
int[] version = new int[2];
if (!mEgl.eglInitialize(mEglDisplay, version)) {
throw new RuntimeException("eglInitialize failed " +
GLUtils.getEGLErrorString(mEgl.eglGetError()));
}
mEglConfig = chooseEglConfig();
if (mEglConfig == null) {
throw new RuntimeException("eglConfig not initialized");
}
mEglContext = createContext(mEgl, mEglDisplay, mEglConfig);
mEglSurface = mEgl.eglCreateWindowSurface(mEglDisplay, mEglConfig, mSurface, null);
if (mEglSurface == null || mEglSurface == EGL10.EGL_NO_SURFACE) {
int error = mEgl.eglGetError();
if (error == EGL10.EGL_BAD_NATIVE_WINDOW) {
Log.e(LOG_TAG, "createWindowSurface returned EGL_BAD_NATIVE_WINDOW.");
return;
}
throw new RuntimeException("createWindowSurface failed "
+ GLUtils.getEGLErrorString(error));
}
if (!mEgl.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext)) {
throw new RuntimeException("eglMakeCurrent failed "
+ GLUtils.getEGLErrorString(mEgl.eglGetError()));
}
mGL = mEglContext.getGL();
}
EGLContext createContext(EGL10 egl, EGLDisplay eglDisplay, EGLConfig eglConfig) {
int[] attrib_list = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE };
return egl.eglCreateContext(eglDisplay, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list);
}
private EGLConfig chooseEglConfig() {
int[] configsCount = new int[1];
EGLConfig[] configs = new EGLConfig[1];
int[] configSpec = getConfig();
if (!mEgl.eglChooseConfig(mEglDisplay, configSpec, configs, 1, configsCount)) {
throw new IllegalArgumentException("eglChooseConfig failed " +
GLUtils.getEGLErrorString(mEgl.eglGetError()));
} else if (configsCount[0] > 0) {
return configs[0];
}
return null;
}
private static int[] getConfig() {
return new int[] {
EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL10.EGL_RED_SIZE, 8,
EGL10.EGL_GREEN_SIZE, 8,
EGL10.EGL_BLUE_SIZE, 8,
EGL10.EGL_ALPHA_SIZE, 8,
EGL10.EGL_DEPTH_SIZE, 0,
EGL10.EGL_STENCIL_SIZE, 0,
EGL10.EGL_NONE
};
}
void finish() {
mFinished = true;
}
}
}
请让我知道我哪里出错......
答案 0 :(得分：0)
我不知道多少但是我必须在这个问题上遵守指示： 创建一个OpenGL上下文