hardwarebuffer怎么用
时间: 2023-07-08 09:42:56 浏览: 75
HardwareBuffer是Android Oreo(API级别26)中引入的新特性,它允许图形渲染和计算API(如OpenGL ES,Vulkan和RenderScript)直接访问硬件缓冲区,从而在GPU和CPU之间实现高效的数据共享。硬件缓冲区通常与图像或图形数据相关联。
下面是一些使用HardwareBuffer的示例代码:
1. 创建HardwareBuffer对象:
```java
import android.graphics.HardwareBuffer;
int width = 1280;
int height = 720;
int format = HardwareBuffer.RGBA_8888;
HardwareBuffer buffer = HardwareBuffer.create(width, height, format, 1);
```
2. 将HardwareBuffer用作OpenGL ES纹理:
```java
import android.opengl.GLES31Ext;
int textureId = 0;
GLES31Ext.glCreateTextures(GLES31Ext.GL_TEXTURE_EXTERNAL_OES, 1, textureId);
GLES31Ext.glEGLImageTargetTexture2DOES(GLES31Ext.GL_TEXTURE_EXTERNAL_OES, buffer);
```
3. 将HardwareBuffer用作RenderScript输入/输出:
```java
import android.renderscript.Allocation;
import android.renderscript.RenderScript;
RenderScript rs = RenderScript.create(context);
Allocation input = Allocation.createFromBitmap(rs, bitmap, Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_SCRIPT);
Allocation output = Allocation.createTyped(rs, new Type.Builder(rs, Element.U8_4(rs)).setX(width).setY(height).create(), Allocation.USAGE_SCRIPT);
input.setFromHardwareBuffer(buffer);
output.copyTo(bitmap);
```
以上示例代码仅供参考,具体实现可能因应用场景的不同而有所不同。