56 lines
2 KiB
Java
56 lines
2 KiB
Java
package net.minecraft.client.renderer;
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import com.mojang.blaze3d.buffers.GpuBuffer;
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import com.mojang.blaze3d.buffers.GpuBufferSlice;
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import com.mojang.blaze3d.buffers.Std140Builder;
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import com.mojang.blaze3d.systems.GpuDevice;
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import com.mojang.blaze3d.systems.RenderSystem;
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import java.nio.ByteBuffer;
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import net.fabricmc.api.EnvType;
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import net.fabricmc.api.Environment;
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import org.joml.Matrix4f;
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import org.lwjgl.system.MemoryStack;
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@Environment(EnvType.CLIENT)
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public class CachedOrthoProjectionMatrixBuffer implements AutoCloseable {
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private final GpuBuffer buffer;
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private final GpuBufferSlice bufferSlice;
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private final float zNear;
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private final float zFar;
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private final boolean invertY;
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private float width;
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private float height;
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public CachedOrthoProjectionMatrixBuffer(String label, float zNear, float zFar, boolean invertY) {
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this.zNear = zNear;
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this.zFar = zFar;
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this.invertY = invertY;
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GpuDevice gpuDevice = RenderSystem.getDevice();
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this.buffer = gpuDevice.createBuffer(() -> "Projection matrix UBO " + label, 136, RenderSystem.PROJECTION_MATRIX_UBO_SIZE);
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this.bufferSlice = this.buffer.slice(0, RenderSystem.PROJECTION_MATRIX_UBO_SIZE);
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}
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public GpuBufferSlice getBuffer(float width, float height) {
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if (this.width != width || this.height != height) {
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Matrix4f matrix4f = this.createProjectionMatrix(width, height);
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try (MemoryStack memoryStack = MemoryStack.stackPush()) {
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ByteBuffer byteBuffer = Std140Builder.onStack(memoryStack, RenderSystem.PROJECTION_MATRIX_UBO_SIZE).putMat4f(matrix4f).get();
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RenderSystem.getDevice().createCommandEncoder().writeToBuffer(this.buffer.slice(), byteBuffer);
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}
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this.width = width;
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this.height = height;
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}
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return this.bufferSlice;
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}
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private Matrix4f createProjectionMatrix(float width, float height) {
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return new Matrix4f().setOrtho(0.0F, width, this.invertY ? height : 0.0F, this.invertY ? 0.0F : height, this.zNear, this.zFar);
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}
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public void close() {
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this.buffer.close();
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}
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}
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