我有下一个问题。 我写了一些使用opengl es 1.0的android应用程序 我正在使用GLSurfaceView和自定义渲染器。以下是我的自定义渲染器 onDrawFrame，onSurfaceChanged，onSurfaceChanged 的方法：
@Override
public void onDrawFrame(GL10 gl) {
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
// clear Screen and Depth Buffer
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
// Reset the Modelview Matrix
gl.glLoadIdentity();
// Drawing
gl.glTranslatef(0f, 0f, -3.0f); // move 5 units INTO the screen
// is the same as moving the camera 5 units away
// gl.glScalef(0.5f, 0.5f, 0.5f); // scale the square to 50%
// otherwise it will be too large
square.draw(gl, mScrollable.getIndexA(), mScrollable.getIndexB(), mScrollable.getAlphaValue()); // Draw the triangle
}
@Override
public void onSurfaceChanged(GL10 gl, int width, int height) {
if(height == 0) { //Prevent A Divide By Zero By
height = 1; //Making Height Equal One
}
gl.glViewport(0, 0, mWidth, mHeight); //Reset The Current Viewport
gl.glMatrixMode(GL10.GL_PROJECTION); //Select The Projection Matrix
gl.glLoadIdentity(); //Reset The Projection Matrix
//Calculate The Aspect Ratio Of The Window
GLU.gluPerspective(gl, 45.0f, (float) width / (float) height, 0.1f, 100.0f);
gl.glMatrixMode(GL10.GL_MODELVIEW); //Select The Modelview Matrix
gl.glLoadIdentity(); //Reset The Modelview Matrix
}
@Override
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
// Load the texture for the square
square.loadGLTexture(gl, this.context);
gl.glEnable(GL10.GL_BLEND);
gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
gl.glEnable(GL10.GL_TEXTURE_2D); //Enable Texture Mapping ( NEW )
gl.glShadeModel(GL10.GL_SMOOTH); //Enable Smooth Shading
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.5f); //Black Background
gl.glClearDepthf(1.0f); //Depth Buffer Setup
gl.glEnable(GL10.GL_DEPTH_TEST); //Enables Depth Testing
gl.glDepthFunc(GL10.GL_LEQUAL); //The Type Of Depth Testing To Do
//Really Nice Perspective Calculations
gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_NICEST);
}
我的Square类渲染纹理：
private int[] textures;
private GL10 mGl;
private FloatBuffer vertexBuffer; // buffer holding the vertices
private float vertices[] = {
-1.0f, -1.8f, 0.0f, // V1 - bottom left
-1.0f, 1.3f, 0.0f, // V2 - top left
1.0f, -1.8f, 0.0f, // V3 - bottom right
1.0f, 1.3f, 0.0f // V4 - top right
};
private FloatBuffer textureBuffer; // buffer holding the texture coordinates
private float texture[] = {
// Mapping coordinates for the vertices
0.0f, 1.0f, // top left (V2)
0.0f, 0.0f, // bottom left (V1)
1.0f, 1.0f, // top right (V4)
1.0f, 0.0f // bottom right (V3)
};
private GlAnimationCache cacheHelper;
public void loadGLTexture(GL10 gl, Context context) {
// loading texture
mGl = gl;
gl.glGenTextures(mImageEntityList.size(), textures, 0);
cacheHelper = new GlAnimationCache(mContext, mImageEntityList, mGlRenderer, mGlSurfaceView);
cacheHelper.initCache(); //it init cache in background thread
}
public void removeTextureAt(int position){
mGl.glDeleteTextures(1, textures, position);
}
public void bindTextureAt(final Bitmap bitmap, int position){
// generate one texture poi, 0);
// ...and bind it to our array
mGl.glBindTexture(GL10.GL_TEXTURE_2D, textures[position]);
mGl.glVertexPointer(2, GL10.GL_FLOAT, 0, vertexBuffer);
mGl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, textureBuffer);
// create nearest filtered texture
mGl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST);
mGl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
//Different possible texture parameters, e.g. GL10.GL_CLAMP_TO_EDGE
// gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_REPEAT);
// gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_REPEAT);
// Use Android GLUtils to specify a two-dimensional texture image from our bitmap
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLUtils.getInternalFormat(bitmap), bitmap, GLUtils.getType(bitmap), 0);
bitmap.recycle();
}
private int prevIndex = 0;
/** The draw method for the square with the GL context */
public void draw(GL10 gl, int indexA, int indexB, float alpha) {
// bind the previously generated texture
if(prevIndex != indexA){
cacheHelper.synchronizeCache(indexA);
prevIndex = indexA;
}
// Point to our buffers
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[indexA]);
// Set the face rotation
gl.glFrontFace(GL10.GL_CW);
// Point to our vertex buffer
gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);
gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, textureBuffer);
gl.glColor4f(1, 1, 1, 1f);
// Draw the vertices as triangle strip
gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, vertices.length / 3);
//Disable the client state before leaving
gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[indexB]);
// Set the face rotation
gl.glFrontFace(GL10.GL_CW);
// Point to our vertex buffer
gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);
gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, textureBuffer);
gl.glColor4f(1, 1, 1, Math.abs(alpha));
// Draw the vertices as triangle strip
gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, vertices.length / 3);
//Disable the client state before leaving
gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
}
所以，接下来的问题是：在三星S5上，阿尔卡特One Touch 4033D和Motorolla Droid Razr纹理都很好。但在三星Galaxy Nexus上，我只看到了白盒＆＃39;。
我试图将纹理的大小更改为2（512 x 512）的幂，但它没有帮助。
答案 0 :(得分：2)
在Square类中添加函数：
public boolean isNPOTSupported(GL10 gl) {
String extensions = gl.glGetString(GL10.GL_EXTENSIONS);
return extensions.indexOf("GL_OES_texture_npot") != -1;
}
当你生成纹理时，添加：
final boolean isNPOTSupported = isNPOTSupported(gl);
if(isNPOTSupported) {
gl.glGenTextures(mImageEntityList.size(), textures, 0);
}else{
for(int i = 0; i < mImageEntityList.size(); i++){
gl.glGenTextures(1, textures, i);
}
}
取而代之的是：
gl.glGenTextures(mImageEntityList.size(), textures, 0);