我创建了一个 opengl 表面,一切正常,但是当我尝试使用以下方法在其上绘制文本时:
public void loadFPSTexture(GL10 gl){
Bitmap bitmap = Bitmap.createBitmap(256, 256, Bitmap.Config.RGB_565);
bitmap.eraseColor(Color.BLACK);
Canvas canvas = new Canvas(bitmap);
Paint textPaint = new Paint();
textPaint.setTextSize(35);
textPaint.setFakeBoldText(true);
textPaint.setAntiAlias(true);
textPaint.setARGB(255, 255, 255, 255);
canvas.drawText("FPS "+reportedFramerate, 10,35, textPaint);
gl.glGenTextures(1, texturesFPS, 0);
gl.glBindTexture(GL10.GL_TEXTURE_2D, texturesFPS[0]);
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);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_REPEAT);
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0);
bitmap.recycle();
}
然后在我的 onDraw 函数中使用:
gl.glPushMatrix();
gl.glEnable(GL10.GL_TEXTURE_2D);
gl.glBindTexture(GL10.GL_TEXTURE_2D, texturesFPS[0]);
gl.glTranslatef(-surfaceSize.x/1.5f, surfaceSize.y/1.5f, 0.0f);
gl.glScalef(10, 10, 1.0f);
gl.glColor4f(1.0f, 1.0f, 1.0f, saturation_head);
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
gl.glVertexPointer(3, GL10.GL_FLOAT, 0,vertexBuffer);
gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, textureFPSBuffer);
gl.glDrawElements(GL10.GL_TRIANGLES, indices.length,GL10.GL_UNSIGNED_SHORT, indexBuffer);
gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
gl.glDisable(GL10.GL_TEXTURE_2D);
gl.glPopMatrix();
我遇到了奇怪的崩溃,并且在此之后无法绘制表面。Logcat 显示以下内容的恒定流:
E/Adreno200-EGL( 2578): eglLockWindowSurface: failed to map the memory for fd=32 offs=1536000
E/SurfaceFlinger( 2578): GL error 0x0505
E/Adreno200-EGL( 2578): eglLockWindowSurface: failed to map the memory for fd=32 offs=1536000
E/Adreno200-EGL( 2578): egliSwapWindowSurface: oglSwapBuffer failed
E/SurfaceFlinger( 2578): eglSwapBuffers: EGL error 0x3003 (EGL_BAD_ALLOC)
我不确定为什么会这样?任何帮助将非常感激!