MappableRingBuffer.java

net.minecraft.client.renderer.MappableRingBuffer

信息

• 全限定名：net.minecraft.client.renderer.MappableRingBuffer
• 类型：public class
• 包：net.minecraft.client.renderer
• 源码路径：src/main/java/net/minecraft/client/renderer/MappableRingBuffer.java
• 起始行号：L13
• 实现：AutoCloseable
• 职责：

  TODO

字段/常量

• BUFFER_COUNT

  • 类型: int
  • 修饰符: private static final
  • 源码定位: L14
  • 说明:

    TODO

• buffers

  • 类型: GpuBuffer[]
  • 修饰符: private final
  • 源码定位: L15
  • 说明:

    TODO

• fences

  • 类型: GpuFence[]
  • 修饰符: private final
  • 源码定位: L16
  • 说明:

    TODO

• size

  • 类型: int
  • 修饰符: private final
  • 源码定位: L17
  • 说明:

    TODO

• current

  • 类型: int
  • 修饰符: private
  • 源码定位: L18
  • 说明:

    TODO

内部类/嵌套类型

• 无

构造器

public MappableRingBuffer(Supplier<String> label, int usage, int size) @ L20

• 构造器名：MappableRingBuffer
• 源码定位：L20
• 修饰符：public

参数:

• label: Supplier
• usage: int
• size: int

说明:

TODO

方法

下面的方法块按源码顺序生成。

public int size() @ L35

• 方法名：size
• 源码定位：L35
• 返回类型：int
• 修饰符：public

参数:

• 无

说明:

TODO

public GpuBuffer currentBuffer() @ L39

• 方法名：currentBuffer
• 源码定位：L39
• 返回类型：GpuBuffer
• 修饰符：public

参数:

• 无

说明:

TODO

public void rotate() @ L50

• 方法名：rotate
• 源码定位：L50
• 返回类型：void
• 修饰符：public

参数:

• 无

说明:

TODO

public void close() @ L59

• 方法名：close
• 源码定位：L59
• 返回类型：void
• 修饰符：public

参数:

• 无

说明:

TODO

代码

@OnlyIn(Dist.CLIENT)
public class MappableRingBuffer implements AutoCloseable {
    private static final int BUFFER_COUNT = 3;
    private final GpuBuffer[] buffers = new GpuBuffer[3];
    private final @Nullable GpuFence[] fences = new GpuFence[3];
    private final int size;
    private int current = 0;
 
    public MappableRingBuffer(Supplier<String> label, @GpuBuffer.Usage int usage, int size) {
        GpuDevice device = RenderSystem.getDevice();
        if ((usage & 1) == 0 && (usage & 2) == 0) {
            throw new IllegalArgumentException("MappableRingBuffer requires at least one of USAGE_MAP_READ or USAGE_MAP_WRITE");
        } else {
            for (int i = 0; i < 3; i++) {
                int finalI = i;
                this.buffers[i] = device.createBuffer(() -> label.get() + " #" + finalI, usage, size);
                this.fences[i] = null;
            }
 
            this.size = size;
        }
    }
 
    public int size() {
        return this.size;
    }
 
    public GpuBuffer currentBuffer() {
        GpuFence fence = this.fences[this.current];
        if (fence != null) {
            fence.awaitCompletion(Long.MAX_VALUE);
            fence.close();
            this.fences[this.current] = null;
        }
 
        return this.buffers[this.current];
    }
 
    public void rotate() {
        if (this.fences[this.current] != null) {
            this.fences[this.current].close();
        }
 
        this.fences[this.current] = RenderSystem.getDevice().createCommandEncoder().createFence();
        this.current = (this.current + 1) % 3;
    }
 
    @Override
    public void close() {
        for (int i = 0; i < 3; i++) {
            this.buffers[i].close();
            if (this.fences[i] != null) {
                this.fences[i].close();
            }
        }
    }
}

引用的其他类

• GpuBuffer

  • 引用位置: 字段/返回值

• GpuFence

  • 引用位置: 字段

• RenderSystem

  • 引用位置: 方法调用
  • 关联成员: RenderSystem.getDevice()