我对RenderScript完全陌生。我试图在http://www.youtube.com/watch?v=5jz0kSuR2j4工作中得到Romain Guy所展示的一个简单示例。
首先，这是代码。
MainActivity.java
package com.example.rsgray;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.renderscript.Allocation;
import android.renderscript.RenderScript;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
requestWindowFeature(Window.FEATURE_NO_TITLE);
ImageView iv = new ImageView(this);
iv.setScaleType(ScaleType.CENTER_CROP);
setContentView(iv);
drawGrayScale(iv, R.drawable.tulips);
}
private void drawGrayScale(ImageView iv, int image) {
Bitmap in = BitmapFactory.decodeResource(getResources(), image);
Bitmap out = Bitmap.createBitmap(in.getWidth(), in.getHeight(), in.getConfig());
RenderScript rs = RenderScript.create(MainActivity.this);
Allocation inAlloc = Allocation.createFromBitmap(rs, in);
Allocation outAlloc = Allocation.createTyped(rs, inAlloc.getType());
ScriptC_gray script = new ScriptC_gray(rs, getResources(), R.raw.gray);
script.set_in(inAlloc);
script.set_out(outAlloc);
script.set_script(script);
script.invoke_filter();
outAlloc.copyTo(out);
iv.setImageBitmap(out);
}
}
gray.rs
#pragma version(1)
#pragma rs java_package_name(com.example.rsgray)
#pragma rs_fp_relaxed
rs_allocation in;
rs_allocation out;
rs_script script;
const static float3 gray = { 0.3f, 0.6f, 0.1f };
void root(const uchar4* v_in, uchar4* v_out, const void* usrData, uint32_t x, uint32_t y) {
rsDebug("gray.rs", rsUptimeMillis());
float4 inPixel = rsUnpackColor8888(*v_in);
float3 result = dot(inPixel.rgb, gray);
*v_out = rsPackColorTo8888(result);
}
void filter() {
rsForEach(script, in, out);
}
最后，AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.rsgray"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="16" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.rsgray.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
res / drawable-nodpi包含tulips.jpg。你不会在Romain Guy的代码中找到我在grey.rs中添加的rsDebug（）语句。
无论如何，代码编译，有或没有rsDebug（）。但是，当我尝试在设备上运行应用程序时，问题就出现了。
我尝试在运行Android 4.4的Nexus 4上运行该应用。使用如图所示的代码，它工作正常，我得到一个灰度图像。但是，如果我注释掉rsDebug（）行，该应用程序将无法正常工作。我只是一个黑屏。
这是logcat输出。
使用rsDebug（）：
11-26 16:22:41.563: D/dalvikvm(21523): GC_FOR_ALLOC freed 69K, 2% free 9046K/9148K, paused 16ms, total 16ms
11-26 16:22:41.573: I/dalvikvm-heap(21523): Grow heap (frag case) to 11.862MB for 3145744-byte allocation
11-26 16:22:41.603: D/dalvikvm(21523): GC_FOR_ALLOC freed <1K, 1% free 12118K/12224K, paused 30ms, total 30ms
11-26 16:22:41.683: D/dalvikvm(21523): GC_FOR_ALLOC freed <1K, 1% free 12117K/12224K, paused 11ms, total 11ms
11-26 16:22:41.693: I/dalvikvm-heap(21523): Grow heap (frag case) to 14.862MB for 3145744-byte allocation
11-26 16:22:41.703: D/dalvikvm(21523): GC_FOR_ALLOC freed 0K, 1% free 15189K/15300K, paused 14ms, total 14ms
11-26 16:22:41.753: V/RenderScript(21523): 0x74ed5020 Launching thread(s), CPUs 4
11-26 16:22:41.753: W/Adreno-RS(21523): <rsdVendorAllocationDestroyQCOM:194>: rsdVendorAllocationDestroy: No context!
11-26 16:22:41.753: E/RenderScript(21523): Successfully loaded runtime: libRSDriver_adreno.so
11-26 16:22:41.783: D/dalvikvm(21523): GC_FOR_ALLOC freed <1K, 1% free 15201K/15300K, paused 11ms, total 11ms
11-26 16:22:41.803: D/dalvikvm(21523): GC_FOR_ALLOC freed <1K, 1% free 15202K/15300K, paused 11ms, total 12ms
11-26 16:22:41.813: W/Adreno-RS(21523): <rsdCompileBitcode:289>: Header check (bitcode_SHA1) failed for /data/data/com.example.rsgray/cache/com.android.renderscript.cache/gray-adreno.meta
11-26 16:22:41.813: W/Adreno-RS(21523): <rsdDumpCompileLog:499>: Build log for gray: RS code uses long(i64) data type
11-26 16:22:41.813: W/Adreno-RS(21523): RS bitcode does not contain an invokable compute root
11-26 16:22:41.813: W/Adreno-RS(21523): <rsdVendorScriptInitQCOM:610>: ERROR: __BuildProgram returned -11
11-26 16:22:41.813: D/RenderScript(21523): long gray.rs 18142906 0x114d6ba
11-26 16:22:41.813: D/RenderScript(21523): long gray.rs 18142906 0x114d6ba
11-26 16:22:41.813: D/RenderScript(21523): long gray.rs 18142906 0x114d6ba
11-26 16:22:41.813: D/RenderScript(21523): long gray.rs 18142906 0x114d6ba
.
. a million more such lines
.
11-26 16:22:44.686: D/RenderScript(21523): long gray.rs 18145771 0x114e1eb
11-26 16:22:44.686: D/RenderScript(21523): long gray.rs 18145771 0x114e1eb
11-26 16:22:44.686: D/RenderScript(21523): long gray.rs 18145771 0x114e1eb
11-26 16:22:44.686: D/RenderScript(21523): long gray.rs 18145771 0x114e1eb
11-26 16:22:44.717: I/Adreno-EGL(21523): <qeglDrvAPI_eglInitialize:320>: EGL 1.4 QUALCOMM build: (CL3776187)
11-26 16:22:44.717: I/Adreno-EGL(21523): OpenGL ES Shader Compiler Version:
11-26 16:22:44.717: I/Adreno-EGL(21523): Build Date: 10/15/13 Tue
11-26 16:22:44.717: I/Adreno-EGL(21523): Local Branch:
11-26 16:22:44.717: I/Adreno-EGL(21523): Remote Branch: partner/upstream
11-26 16:22:44.717: I/Adreno-EGL(21523): Local Patches:
11-26 16:22:44.717: I/Adreno-EGL(21523): Reconstruct Branch:
11-26 16:22:44.747: D/OpenGLRenderer(21523): Enabling debug mode 0
没有rsDebug（）：
11-26 16:23:41.327: D/dalvikvm(21902): GC_FOR_ALLOC freed 56K, 1% free 9046K/9136K, paused 18ms, total 18ms
11-26 16:23:41.337: I/dalvikvm-heap(21902): Grow heap (frag case) to 11.862MB for 3145744-byte allocation
11-26 16:23:41.367: D/dalvikvm(21902): GC_FOR_ALLOC freed <1K, 1% free 12118K/12212K, paused 27ms, total 27ms
11-26 16:23:41.427: D/dalvikvm(21902): GC_FOR_ALLOC freed <1K, 1% free 12117K/12212K, paused 11ms, total 11ms
11-26 16:23:41.437: I/dalvikvm-heap(21902): Grow heap (frag case) to 14.862MB for 3145744-byte allocation
11-26 16:23:41.447: D/dalvikvm(21902): GC_FOR_ALLOC freed 0K, 1% free 15189K/15288K, paused 12ms, total 12ms
11-26 16:23:41.477: V/RenderScript(21902): 0x74ed4f18 Launching thread(s), CPUs 4
11-26 16:23:41.477: W/Adreno-RS(21902): <rsdVendorAllocationDestroyQCOM:194>: rsdVendorAllocationDestroy: No context!
11-26 16:23:41.477: E/RenderScript(21902): Successfully loaded runtime: libRSDriver_adreno.so
11-26 16:23:41.507: D/dalvikvm(21902): GC_FOR_ALLOC freed <1K, 1% free 15201K/15288K, paused 12ms, total 13ms
11-26 16:23:41.527: D/dalvikvm(21902): GC_FOR_ALLOC freed <1K, 1% free 15202K/15288K, paused 12ms, total 12ms
11-26 16:23:41.537: D/bcc(21902): Cache /data/data/com.example.rsgray/cache/com.android.renderscript.cache/gray.o.info is dirty due to the source it dependends on has been changed:
11-26 16:23:43.419: I/Adreno-EGL(21902): <qeglDrvAPI_eglInitialize:320>: EGL 1.4 QUALCOMM build: (CL3776187)
11-26 16:23:43.419: I/Adreno-EGL(21902): OpenGL ES Shader Compiler Version:
11-26 16:23:43.419: I/Adreno-EGL(21902): Build Date: 10/15/13 Tue
11-26 16:23:43.419: I/Adreno-EGL(21902): Local Branch:
11-26 16:23:43.419: I/Adreno-EGL(21902): Remote Branch: partner/upstream
11-26 16:23:43.419: I/Adreno-EGL(21902): Local Patches:
11-26 16:23:43.419: I/Adreno-EGL(21902): Reconstruct Branch:
11-26 16:23:43.449: D/OpenGLRenderer(21902): Enabling debug mode 0
我无法理解调试语句如何影响应用程序的运行方式。任何有关我为什么会遇到这个问题的帮助都会非常感激。
这是我问题的第一部分。
第二部分：当我尝试在运行Android 4.1.2的Galaxy Note 10.1 N8013和运行Android 4.1.2的另一个硬件上运行完全相同的代码时，该应用程序无效。
这是我的硬件的logcat输出：
01-02 00:00:51.043: E/Trace(1684): error opening trace file: No such file or directory (2)
01-02 00:00:51.043: D/ActivityThread(1684): setTargetHeapUtilization:0.25
01-02 00:00:51.043: D/ActivityThread(1684): setTargetHeapIdealFree:8388608
01-02 00:00:51.053: D/ActivityThread(1684): setTargetHeapConcurrentStart:2097152
01-02 00:00:51.183: V/RenderScript(1684): rsContextCreate dev=0x7276fdd0
01-02 00:00:51.183: V/RenderScript(1684): 0x616350e0 Launching thread(s), CPUs 4
01-02 00:00:51.203: V/ScriptC(1684): Create script for resource = gray
01-02 00:00:51.203: E/bcc(1684): CPU is krait2
01-02 00:00:51.274: W/bcc(1684): Unable to open /data/data/com.example.rsgray/cache/com.android.renderscript.cache/gray.o in read mode. (reason: No such file or directory)
01-02 00:00:51.404: A/libc(1684): Fatal signal 11 (SIGSEGV) at 0xdeadbaad (code=1), thread 1701 (.example.rsgray)
最后，这里是三星平板电脑的logcat输出：
01-02 10:34:47.470: D/dalvikvm(19022): GC_FOR_ALLOC freed 48K, 11% free 7046K/7875K, paused 13ms, total 13ms
01-02 10:34:47.475: I/dalvikvm-heap(19022): Grow heap (frag case) to 10.495MB for 3145744-byte allocation
01-02 10:34:47.495: D/dalvikvm(19022): GC_CONCURRENT freed <1K, 9% free 10117K/11015K, paused 11ms+1ms, total 18ms
01-02 10:34:47.585: D/dalvikvm(19022): GC_FOR_ALLOC freed <1K, 9% free 10117K/11015K, paused 10ms, total 10ms
01-02 10:34:47.590: I/dalvikvm-heap(19022): Grow heap (frag case) to 13.494MB for 3145744-byte allocation
01-02 10:34:47.610: D/dalvikvm(19022): GC_CONCURRENT freed <1K, 7% free 13189K/14151K, paused 11ms+3ms, total 23ms
01-02 10:34:47.610: D/dalvikvm(19022): WAIT_FOR_CONCURRENT_GC blocked 12ms
01-02 10:34:47.610: V/RenderScript(19022): rsContextCreate dev=0x40e3b288
01-02 10:34:47.615: V/RenderScript(19022): 0x411e3008 Launching thread(s), CPUs 3
01-02 10:34:47.625: V/ScriptC(19022): Create script for resource = gray
01-02 10:34:47.625: I/bcc(19022): LIBBCC build time: 2013/01/09 23:19:52
01-02 10:34:47.625: I/bcc(19022): LIBBCC build revision: Unknown (not git)
01-02 10:34:47.645: D/StopWatch(19022): StopWatch calcFileSHA1 time (us): 17719
01-02 10:34:47.650: D/StopWatch(19022): StopWatch calcFileSHA1 time (us): 3031
01-02 10:34:47.650: W/bcc(19022): Unable to open file in read mode. (reason: No such file or directory)
01-02 10:34:47.750: A/libc(19022): Fatal signal 11 (SIGSEGV) at 0xdeadbaad (code=1), thread 19053 (.example.rsgray)
关于它。如果有人知道如何解释这个，请告诉我。
谢谢！
答案 0 :(得分：2)
我刚遇到同样的问题。当rsDebug在同一个函数中的某个地方时似乎是固定的。这为我解决了这个问题：
if(x > 0) {
if(x < 0) {
rsDebug("Workaround for renderscript bug", 0.0f);
}
/* Code */
}
使用它，rsDebug实际上从未被调用，因此它不会输出任何内容。
请注意，这不起作用：
if(0) {
rsDebug("Workaround for renderscript bug", 0.0f);
}
这可能已经过优化。