State your state

- Address a few bugs with rubidium
 - Ignore EBOs when restoring state
 - ElementBuffer deals in raw gl handles
 - Document all state changes/restores/resets

Co-authored-by: PepperCode1 <44146161+peppercode1@users.noreply.github.com>
This commit is contained in:
Jozufozu 2022-10-22 12:36:13 -07:00 committed by PepperCode1
parent 2c7a6abcb6
commit 98e4831b6e
12 changed files with 119 additions and 154 deletions

View file

@ -39,7 +39,7 @@ public class GlStateTracker {
return new State(BUFFERS.clone(), vao, program);
}
public static record State(int[] buffers, int vao, int program) {
public record State(int[] buffers, int vao, int program) {
public void restore() {
if (vao != GlStateTracker.vao) {
GlStateManager._glBindVertexArray(vao);
@ -48,7 +48,7 @@ public class GlStateTracker {
GlBufferType[] values = GlBufferType.values();
for (int i = 0; i < values.length; i++) {
if (buffers[i] != GlStateTracker.BUFFERS[i]) {
if (buffers[i] != GlStateTracker.BUFFERS[i] && values[i] != GlBufferType.ELEMENT_ARRAY_BUFFER) {
GlStateManager._glBindBuffer(values[i].glEnum, buffers[i]);
}
}

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@ -45,6 +45,7 @@ public class GPUInstancer<D extends InstanceData> extends AbstractInstancer<D> {
public void render() {
if (invalid()) return;
// XXX VAO is bound and not reset or restored
vao.bind();
renderSetup();
@ -68,12 +69,15 @@ public class GPUInstancer<D extends InstanceData> extends AbstractInstancer<D> {
vao = new GlVertexArray();
// XXX Callback seems unnecessary. Remove and extract code to run after alloc call?
model = modelAllocator.alloc(modelData, arenaModel -> {
// XXX VAO is bound and not reset or restored
vao.bind();
arenaModel.setupState(vao);
});
// XXX VAO is already guaranteed to be bound in model callback
vao.bind();
vao.enableArrays(model.getAttributeCount() + instanceFormat.getAttributeCount());
@ -108,6 +112,7 @@ public class GPUInstancer<D extends InstanceData> extends AbstractInstancer<D> {
removeDeletedInstances();
}
// XXX ARRAY_BUFFER is bound and reset
instanceVBO.bind();
if (!realloc()) {

View file

@ -68,15 +68,23 @@ public class InstancedMaterialGroup<P extends WorldProgram> implements MaterialG
return vertexCount;
}
// XXX Overriden in CrumblingGroup
// XXX Runs inside of restore state
public void render(Matrix4f viewProjection, double camX, double camY, double camZ, RenderLayer layer) {
type.setupRenderState();
Textures.bindActiveTextures();
renderAll(viewProjection, camX, camY, camZ, layer);
Textures.bindActiveTextures(); // XXX Changes active unit and bound textures
renderAll(viewProjection, camX, camY, camZ, layer); // XXX May change ARRAY_BUFFER binding (reset or not reset), VAO binding (not reset), shader binding (not reset), call Model.createEBO
type.clearRenderState();
// XXX Should texture bindings be reset or restored?
// XXX Should the active unit be reset or restored?
// XXX Should the VAO binding be reset or restored?
// XXX Should the ARRAY_BUFFER binding be reset or restored?
// XXX Should the shader binding be reset or restored?
}
// XXX Internal GL state changes are inconsistent; sometimes bindings are reset to 0, sometimes not
protected void renderAll(Matrix4f viewProjection, double camX, double camY, double camZ, RenderLayer layer) {
initializeInstancers();
initializeInstancers(); // XXX May change ARRAY_BUFFER binding (reset or not reset), VAO binding (not reset), call Model.createEBO
vertexCount = 0;
instanceCount = 0;
@ -88,6 +96,7 @@ public class InstancedMaterialGroup<P extends WorldProgram> implements MaterialG
P program = owner.context.getProgram(ProgramContext.create(entry.getKey()
.getProgramSpec(), Formats.POS_TEX_NORMAL, layer));
// XXX Shader is bound and not reset or restored
program.bind();
program.uploadViewProjection(viewProjection);
program.uploadCameraPos(camX, camY, camZ);
@ -95,7 +104,7 @@ public class InstancedMaterialGroup<P extends WorldProgram> implements MaterialG
setup(program);
for (GPUInstancer<?> instancer : material.getAllInstancers()) {
instancer.render();
instancer.render(); // XXX May change VAO binding (not reset), ARRAY_BUFFER binding (reset)
vertexCount += instancer.getVertexCount();
instanceCount += instancer.getInstanceCount();
}
@ -103,19 +112,19 @@ public class InstancedMaterialGroup<P extends WorldProgram> implements MaterialG
}
private void initializeInstancers() {
ModelAllocator allocator = getModelAllocator();
ModelAllocator allocator = getModelAllocator(); // XXX May change ARRAY_BUFFER binding (not reset)
// initialize all uninitialized instancers...
for (InstancedMaterial<?> material : materials.values()) {
for (GPUInstancer<?> instancer : material.uninitialized) {
instancer.init(allocator);
instancer.init(allocator); // XXX May change VAO binding (not reset), ARRAY_BUFFER binding (not reset), call Model.createEBO
}
material.uninitialized.clear();
}
if (allocator instanceof ModelPool pool) {
// ...and then flush the model arena in case anything was marked for upload
pool.flush();
pool.flush(); // XXX May change ARRAY_BUFFER binding (reset)
}
}

View file

@ -74,6 +74,7 @@ public class InstancingEngine<P extends WorldProgram> implements Engine {
*/
@Override
public void render(TaskEngine taskEngine, RenderLayerEvent event) {
// XXX Restore state
GlStateTracker.State restoreState = GlStateTracker.getRestoreState();
double camX;

View file

@ -1,25 +1,29 @@
package com.jozufozu.flywheel.backend.model;
import com.jozufozu.flywheel.backend.gl.GlNumericType;
import com.jozufozu.flywheel.backend.gl.buffer.GlBuffer;
import com.jozufozu.flywheel.backend.gl.buffer.GlBufferType;
import com.mojang.blaze3d.vertex.VertexFormat;
public class ElementBuffer {
private final GlBuffer buffer;
public final int elementCount;
public final GlNumericType eboIndexType;
protected final int elementCount;
protected final VertexFormat.IndexType eboIndexType;
private final int glBuffer;
public ElementBuffer(GlBuffer backing, int elementCount, GlNumericType indexType) {
this.buffer = backing;
this.eboIndexType = indexType;
public ElementBuffer(int backing, int elementCount, VertexFormat.IndexType indexType) {
this.elementCount = elementCount;
this.eboIndexType = indexType;
this.glBuffer = backing;
}
public void bind() {
buffer.bind();
GlBufferType.ELEMENT_ARRAY_BUFFER.bind(glBuffer);
}
public void unbind() {
buffer.unbind();
public int getElementCount() {
return elementCount;
}
public VertexFormat.IndexType getEboIndexType() {
return eboIndexType;
}
}

View file

@ -52,27 +52,26 @@ public class IndexedModel implements BufferedModel {
* The VBO/VAO should be bound externally.
*/
public void setupState(GlVertexArray vao) {
// XXX ARRAY_BUFFER is bound and not reset or restored
vbo.bind();
vao.enableArrays(getAttributeCount());
vao.bindAttributes(0, getType().getLayout());
ebo.bind();
}
@Override
public void drawCall() {
ebo.bind();
GL20.glDrawElements(primitiveMode.glEnum, ebo.elementCount, ebo.eboIndexType.getGlEnum(), 0);
GL20.glDrawElements(primitiveMode.glEnum, ebo.getElementCount(), ebo.getEboIndexType().asGLType, 0);
}
/**
* Draws many instances of this model, assuming the appropriate state is already bound.
*/
* Draws many instances of this model, assuming the appropriate state is already bound.
*/
@Override
public void drawInstances(int instanceCount) {
if (!valid()) return;
ebo.bind();
GL31.glDrawElementsInstanced(primitiveMode.glEnum, ebo.elementCount, ebo.eboIndexType.getGlEnum(), 0, instanceCount);
GL31.glDrawElementsInstanced(primitiveMode.glEnum, ebo.getElementCount(), ebo.getEboIndexType().asGLType, 0, instanceCount);
}
public boolean isDeleted() {

View file

@ -42,6 +42,7 @@ public class ModelPool implements ModelAllocator {
vbo = new MappedGlBuffer(GlBufferType.ARRAY_BUFFER);
// XXX ARRAY_BUFFER is bound and not reset or restored
vbo.bind();
vbo.setGrowthMargin(stride * 64);
}
@ -68,6 +69,7 @@ public class ModelPool implements ModelAllocator {
if (dirty) {
if (anyToRemove) processDeletions();
// XXX ARRAY_BUFFER is bound and reset
vbo.bind();
if (realloc()) {
uploadAll();
@ -182,25 +184,25 @@ public class ModelPool implements ModelAllocator {
@Override
public void setupState(GlVertexArray vao) {
// XXX ARRAY_BUFFER is bound and not reset or restored
vbo.bind();
vao.enableArrays(getAttributeCount());
vao.bindAttributes(0, vertexType.getLayout());
ebo.bind();
}
@Override
public void drawCall() {
GL32.glDrawElementsBaseVertex(GlPrimitive.TRIANGLES.glEnum, ebo.elementCount, ebo.eboIndexType.getGlEnum(), 0, first);
GL32.glDrawElementsBaseVertex(GlPrimitive.TRIANGLES.glEnum, ebo.getElementCount(), ebo.getEboIndexType().asGLType, 0, first);
}
@Override
public void drawInstances(int instanceCount) {
if (!valid()) return;
ebo.bind();
//Backend.log.info(StringUtil.args("drawElementsInstancedBaseVertex", GlPrimitive.TRIANGLES, ebo.elementCount, ebo.eboIndexType, 0, instanceCount, first));
GL32.glDrawElementsInstancedBaseVertex(GlPrimitive.TRIANGLES.glEnum, ebo.elementCount, ebo.eboIndexType.getGlEnum(), 0, instanceCount, first);
GL32.glDrawElementsInstancedBaseVertex(GlPrimitive.TRIANGLES.glEnum, ebo.getElementCount(), ebo.getEboIndexType().asGLType, 0, instanceCount, first);
}
@Override

View file

@ -58,6 +58,7 @@ public class VBOModel implements BufferedModel {
* The VBO/VAO should be bound externally.
*/
public void setupState(GlVertexArray vao) {
// XXX ARRAY_BUFFER is bound and not reset or restored
vbo.bind();
vao.enableArrays(getAttributeCount());
vao.bindAttributes(0, getLayout());

View file

@ -1,43 +1,32 @@
package com.jozufozu.flywheel.core;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.EnumMap;
import java.util.Map;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import org.lwjgl.system.MemoryStack;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.lwjgl.opengl.GL32;
import org.lwjgl.opengl.GL32C;
import org.lwjgl.system.MemoryUtil;
import com.jozufozu.flywheel.backend.gl.GlNumericType;
import com.jozufozu.flywheel.backend.gl.buffer.GlBuffer;
import com.jozufozu.flywheel.backend.gl.buffer.GlBufferType;
import com.jozufozu.flywheel.backend.gl.buffer.MappedGlBuffer;
import com.jozufozu.flywheel.backend.gl.buffer.GlBufferUsage;
import com.jozufozu.flywheel.backend.model.ElementBuffer;
import com.jozufozu.flywheel.event.ReloadRenderersEvent;
import com.mojang.blaze3d.vertex.VertexFormat;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.eventbus.api.EventPriority;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod;
import it.unimi.dsi.fastutil.ints.Int2ReferenceArrayMap;
import it.unimi.dsi.fastutil.ints.Int2ReferenceMap;
/**
* A class to manage EBOs that index quads as triangles.
*/
@Mod.EventBusSubscriber(Dist.CLIENT)
public class QuadConverter {
public static final int STARTING_CAPACITY = 42; // 255 / 6 = 42
private static QuadConverter INSTANCE;
@Nonnull
@NotNull
public static QuadConverter getInstance() {
if (INSTANCE == null) {
INSTANCE = new QuadConverter(STARTING_CAPACITY);
INSTANCE = new QuadConverter();
}
return INSTANCE;
@ -48,130 +37,78 @@ public class QuadConverter {
return INSTANCE;
}
Map<GlNumericType, GlBuffer> ebos;
int[] capacities;
private final Int2ReferenceMap<ElementBuffer> cache = new Int2ReferenceArrayMap<>();
private final int ebo;
private int quadCapacity;
public QuadConverter(int initialCapacity) {
this.ebos = new EnumMap<>(GlNumericType.class);
initCapacities();
fillBuffer(initialCapacity);
public QuadConverter() {
this.ebo = GL32.glGenBuffers();
this.quadCapacity = 0;
}
public ElementBuffer quads2Tris(int quads) {
int indexCount = quads * 6;
GlNumericType type = getSmallestIndexType(indexCount);
if (quads > getCapacity(type)) {
fillBuffer(quads, indexCount, type);
if (quads > quadCapacity) {
grow(quads * 2);
}
return new ElementBuffer(getBuffer(type), indexCount, type);
return cache.computeIfAbsent(quads, this::createElementBuffer);
}
private void initCapacities() {
this.capacities = new int[GlNumericType.values().length];
@NotNull
private ElementBuffer createElementBuffer(int quads) {
return new ElementBuffer(ebo, quads * 6, VertexFormat.IndexType.INT);
}
private int getCapacity(GlNumericType type) {
return capacities[type.ordinal()];
}
private void grow(int quads) {
int byteSize = quads * 6 * GlNumericType.UINT.getByteWidth();
final long ptr = MemoryUtil.nmemAlloc(byteSize);
private void updateCapacity(GlNumericType type, int capacity) {
if (getCapacity(type) < capacity) {
capacities[type.ordinal()] = capacity;
}
fillBuffer(ptr, quads);
// XXX ARRAY_BUFFER is bound and reset
final var bufferType = GlBufferType.ARRAY_BUFFER;
final int oldBuffer = bufferType.getBoundBuffer();
bufferType.bind(ebo);
GL32C.nglBufferData(bufferType.glEnum, byteSize, ptr, GlBufferUsage.STATIC_DRAW.glEnum);
bufferType.bind(oldBuffer);
MemoryUtil.nmemFree(ptr);
this.quadCapacity = quads;
}
public void delete() {
ebos.values()
.forEach(GlBuffer::delete);
ebos.clear();
initCapacities();
GL32.glDeleteBuffers(ebo);
this.quadCapacity = 0;
}
private void fillBuffer(int quads) {
int indexCount = quads * 6;
private void fillBuffer(long ptr, int quads) {
int numVertices = 4 * quads;
int baseVertex = 0;
while (baseVertex < numVertices) {
writeQuadIndicesUnsafe(ptr, baseVertex);
fillBuffer(quads, indexCount, getSmallestIndexType(indexCount));
}
private void fillBuffer(int quads, int indexCount, GlNumericType type) {
MemoryStack stack = MemoryStack.stackPush();
int bytes = indexCount * type.getByteWidth();
ByteBuffer indices;
if (bytes > stack.getSize()) {
indices = MemoryUtil.memAlloc(bytes); // not enough space on the preallocated stack
} else {
stack.push();
indices = stack.malloc(bytes);
baseVertex += 4;
ptr += 6 * 4;
}
indices.order(ByteOrder.nativeOrder());
fillBuffer(indices, type, quads);
GlBuffer buffer = getBuffer(type);
buffer.bind();
buffer.upload(indices);
buffer.unbind();
if (bytes > stack.getSize()) {
MemoryUtil.memFree(indices);
} else {
stack.pop();
}
updateCapacity(type, quads);
}
private void fillBuffer(ByteBuffer indices, GlNumericType type, int quads) {
for (int i = 0, max = 4 * quads; i < max; i += 4) {
// triangle a
type.castAndBuffer(indices, i);
type.castAndBuffer(indices, i + 1);
type.castAndBuffer(indices, i + 2);
// triangle b
type.castAndBuffer(indices, i);
type.castAndBuffer(indices, i + 2);
type.castAndBuffer(indices, i + 3);
}
((Buffer) indices).flip();
private void writeQuadIndicesUnsafe(long ptr, int baseVertex) {
// triangle a
MemoryUtil.memPutInt(ptr, baseVertex);
MemoryUtil.memPutInt(ptr + 4, baseVertex + 1);
MemoryUtil.memPutInt(ptr + 8, baseVertex + 2);
// triangle b
MemoryUtil.memPutInt(ptr + 12, baseVertex);
MemoryUtil.memPutInt(ptr + 16, baseVertex + 2);
MemoryUtil.memPutInt(ptr + 20, baseVertex + 3);
}
private GlBuffer getBuffer(GlNumericType type) {
return ebos.computeIfAbsent(type, $ -> new MappedGlBuffer(GlBufferType.ELEMENT_ARRAY_BUFFER));
}
/**
* Given the needed number of indices, what is the smallest bit width type that can index everything? <br>
*
* <pre>
* | indexCount | type |
* |--------------|-------|
* | [0, 255) | byte |
* | [256, 65536) | short |
* | [65537, ) | int |
* </pre>
*/
private static GlNumericType getSmallestIndexType(int indexCount) {
// indexCount = indexCount >>> 8;
// if (indexCount == 0) {
// return GlNumericType.UBYTE;
// }
// indexCount = indexCount >>> 8;
// if (indexCount == 0) {
// return GlNumericType.USHORT;
// }
return GlNumericType.UINT;
}
// make sure this gets reset first so it has a chance to repopulate
@SubscribeEvent(priority = EventPriority.HIGHEST)
// make sure this gets reset first, so it has a chance to repopulate
public static void onRendererReload(ReloadRenderersEvent event) {
if (INSTANCE != null) INSTANCE.delete();
if (INSTANCE != null) {
INSTANCE.delete();
INSTANCE = null;
}
}
}

View file

@ -18,6 +18,7 @@ public class CrumblingGroup<P extends CrumblingProgram> extends InstancedMateria
super(owner, type);
}
// XXX See notes of overriden method
@Override
public void render(Matrix4f viewProjection, double camX, double camY, double camZ, RenderLayer layer) {
type.setupRenderState();

View file

@ -65,6 +65,7 @@ public class CrumblingRenderer {
Vec3 cameraPos = camera.getPosition();
// XXX Restore state
GlStateTracker.State restoreState = GlStateTracker.getRestoreState();
CrumblingRenderer.renderBreaking(activeStages, new RenderLayerEvent(level, null, stack, null, cameraPos.x, cameraPos.y, cameraPos.z));
restoreState.restore();
@ -87,6 +88,7 @@ public class CrumblingRenderer {
instanceManager.beginFrame(SerialTaskEngine.INSTANCE, info);
// XXX Each call applies another restore state even though we are already inside of a restore state
materials.render(SerialTaskEngine.INSTANCE, event);
instanceManager.invalidate();
@ -94,6 +96,9 @@ public class CrumblingRenderer {
}
// XXX Inconsistent GL state cleanup
// If texture binding and active unit need to be restored, store them in variables before GL state is changed
// instead of guessing that unit 0 and crumbling tex 0 are correct
GlTextureUnit.T0.makeActive();
AbstractTexture breaking = textureManager.getTexture(ModelBakery.BREAKING_LOCATIONS.get(0));
if (breaking != null) RenderSystem.bindTexture(breaking.getId());

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@ -46,6 +46,7 @@ public interface Model {
return Formats.POS_TEX_NORMAL;
}
// XXX Since this is public API (technically) we cannot make assumptions about what GL state this method can use or modify unless a contract is established.
/**
* Create an element buffer object that indexes the vertices of this model.
*