115 lines
4.5 KiB
Java
115 lines
4.5 KiB
Java
package com.mojang.blaze3d.opengl;
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import java.nio.ByteBuffer;
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import java.util.Set;
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import java.util.function.Supplier;
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import net.fabricmc.api.EnvType;
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import net.fabricmc.api.Environment;
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import org.jetbrains.annotations.Nullable;
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import org.lwjgl.opengl.GLCapabilities;
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import org.lwjgl.system.MemoryUtil;
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@Environment(EnvType.CLIENT)
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public abstract class BufferStorage {
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public static BufferStorage create(GLCapabilities capabilities, Set<String> enabledExtensions) {
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if (capabilities.GL_ARB_buffer_storage && GlDevice.USE_GL_ARB_buffer_storage) {
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enabledExtensions.add("GL_ARB_buffer_storage");
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return new BufferStorage.Immutable();
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} else {
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return new BufferStorage.Mutable();
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}
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}
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public abstract GlBuffer createBuffer(DirectStateAccess directStateAccess, @Nullable Supplier<String> label, int usage, int size);
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public abstract GlBuffer createBuffer(DirectStateAccess directStateAccess, @Nullable Supplier<String> label, int usage, ByteBuffer data);
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public abstract GlBuffer.GlMappedView mapBuffer(DirectStateAccess directStateAccess, GlBuffer buffer, int offset, int size, int usage);
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@Environment(EnvType.CLIENT)
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static class Immutable extends BufferStorage {
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@Override
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public GlBuffer createBuffer(DirectStateAccess directStateAccess, @Nullable Supplier<String> label, int usage, int size) {
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int i = directStateAccess.createBuffer();
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directStateAccess.bufferStorage(i, size, GlConst.bufferUsageToGlFlag(usage));
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ByteBuffer byteBuffer = this.tryMapBufferPersistent(directStateAccess, usage, i, size);
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return new GlBuffer(label, directStateAccess, usage, size, i, byteBuffer);
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}
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@Override
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public GlBuffer createBuffer(DirectStateAccess directStateAccess, @Nullable Supplier<String> label, int usage, ByteBuffer data) {
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int i = directStateAccess.createBuffer();
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int j = data.remaining();
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directStateAccess.bufferStorage(i, data, GlConst.bufferUsageToGlFlag(usage));
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ByteBuffer byteBuffer = this.tryMapBufferPersistent(directStateAccess, usage, i, j);
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return new GlBuffer(label, directStateAccess, usage, j, i, byteBuffer);
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}
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@Nullable
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private ByteBuffer tryMapBufferPersistent(DirectStateAccess directStateAccess, int usage, int handle, int size) {
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int i = 0;
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if ((usage & 1) != 0) {
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i |= 1;
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}
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if ((usage & 2) != 0) {
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i |= 18;
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}
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ByteBuffer byteBuffer;
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if (i != 0) {
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GlStateManager.clearGlErrors();
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byteBuffer = directStateAccess.mapBufferRange(handle, 0, size, i | 64);
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if (byteBuffer == null) {
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throw new IllegalStateException("Can't persistently map buffer, opengl error " + GlStateManager._getError());
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}
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} else {
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byteBuffer = null;
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}
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return byteBuffer;
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}
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@Override
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public GlBuffer.GlMappedView mapBuffer(DirectStateAccess directStateAccess, GlBuffer buffer, int offset, int size, int usage) {
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if (buffer.persistentBuffer == null) {
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throw new IllegalStateException("Somehow trying to map an unmappable buffer");
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} else {
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return new GlBuffer.GlMappedView(() -> {
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if ((usage & 2) != 0) {
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directStateAccess.flushMappedBufferRange(buffer.handle, offset, size);
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}
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}, buffer, MemoryUtil.memSlice(buffer.persistentBuffer, offset, size));
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}
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}
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}
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@Environment(EnvType.CLIENT)
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static class Mutable extends BufferStorage {
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@Override
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public GlBuffer createBuffer(DirectStateAccess directStateAccess, @Nullable Supplier<String> label, int usage, int size) {
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int i = directStateAccess.createBuffer();
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directStateAccess.bufferData(i, size, GlConst.bufferUsageToGlEnum(usage));
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return new GlBuffer(label, directStateAccess, usage, size, i, null);
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}
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@Override
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public GlBuffer createBuffer(DirectStateAccess directStateAccess, @Nullable Supplier<String> label, int usage, ByteBuffer data) {
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int i = directStateAccess.createBuffer();
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int j = data.remaining();
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directStateAccess.bufferData(i, data, GlConst.bufferUsageToGlEnum(usage));
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return new GlBuffer(label, directStateAccess, usage, j, i, null);
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}
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@Override
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public GlBuffer.GlMappedView mapBuffer(DirectStateAccess directStateAccess, GlBuffer buffer, int offset, int size, int usage) {
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GlStateManager.clearGlErrors();
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ByteBuffer byteBuffer = directStateAccess.mapBufferRange(buffer.handle, offset, size, usage);
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if (byteBuffer == null) {
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throw new IllegalStateException("Can't map buffer, opengl error " + GlStateManager._getError());
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} else {
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return new GlBuffer.GlMappedView(() -> directStateAccess.unmapBuffer(buffer.handle), buffer, byteBuffer);
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}
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}
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}
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}
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