162 lines
5.1 KiB
Java
162 lines
5.1 KiB
Java
/*
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* Copyright (c) 2002-2008 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.opengl;
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import java.nio.IntBuffer;
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import static org.lwjgl.opengl.GL15.*;
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import static org.lwjgl.opengl.GL21.*;
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import static org.lwjgl.opengl.GL40.*;
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final class StateTracker {
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private ReferencesStack references_stack;
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private final StateStack attrib_stack;
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private boolean insideBeginEnd;
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// VAOs are not shareable between contexts, no need to sync or make this static.
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private final FastIntMap<VAOState> vaoMap = new FastIntMap<VAOState>();
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StateTracker() {
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attrib_stack = new StateStack(0);
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}
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/** This is called after getting function addresses. */
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void init() {
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references_stack = new ReferencesStack();
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}
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static void setBeginEnd(ContextCapabilities caps, boolean inside) {
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caps.tracker.insideBeginEnd = inside;
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}
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boolean isBeginEnd() {
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return insideBeginEnd;
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}
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static void popAttrib(ContextCapabilities caps) {
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caps.tracker.doPopAttrib();
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}
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private void doPopAttrib() {
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references_stack.popState(attrib_stack.popState());
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}
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static void pushAttrib(ContextCapabilities caps, int mask) {
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caps.tracker.doPushAttrib(mask);
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}
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private void doPushAttrib(int mask) {
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attrib_stack.pushState(mask);
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references_stack.pushState();
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}
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static References getReferences(ContextCapabilities caps) {
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return caps.tracker.references_stack.getReferences();
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}
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static void bindBuffer(ContextCapabilities caps, int target, int buffer) {
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final BaseReferences references = getReferences(caps);
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switch ( target ) {
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case GL_ARRAY_BUFFER:
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references.arrayBuffer = buffer;
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break;
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case GL_ELEMENT_ARRAY_BUFFER:
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// When a vertex array object is currently bound, update
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// the VAO state instead of client state.
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if ( references.vertexArrayObject != 0 )
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caps.tracker.vaoMap.get(references.vertexArrayObject).elementArrayBuffer = buffer;
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else
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references.elementArrayBuffer = buffer;
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break;
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case GL_PIXEL_PACK_BUFFER:
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references.pixelPackBuffer = buffer;
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break;
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case GL_PIXEL_UNPACK_BUFFER:
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references.pixelUnpackBuffer = buffer;
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break;
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case GL_DRAW_INDIRECT_BUFFER:
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references.indirectBuffer = buffer;
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break;
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}
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}
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static void bindVAO(final ContextCapabilities caps, final int array) {
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final FastIntMap<VAOState> vaoMap = caps.tracker.vaoMap;
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if ( !vaoMap.containsKey(array) )
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vaoMap.put(array, new VAOState());
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getReferences(caps).vertexArrayObject = array;
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}
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static void deleteVAO(final ContextCapabilities caps, final IntBuffer arrays) {
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for ( int i = arrays.position(); i < arrays.limit(); i++ )
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deleteVAO(caps, arrays.get(i));
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}
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static void deleteVAO(final ContextCapabilities caps, final int array) {
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caps.tracker.vaoMap.remove(array);
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final BaseReferences references = getReferences(caps);
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if ( references.vertexArrayObject == array )
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references.vertexArrayObject = 0;
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}
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/**
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* Returns the currently bound ELEMENT_ARRAY_BUFFER. If a vertex array
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* object is currently bound, then the VAO state is returned instead
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* of the client state.
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*
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* @return the currently bound ELEMENT_ARRAY_BUFFER.
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*/
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static int getElementArrayBufferBound(final ContextCapabilities caps) {
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final BaseReferences references = getReferences(caps);
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if ( references.vertexArrayObject == 0 )
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return references.elementArrayBuffer;
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else
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return caps.tracker.vaoMap.get(references.vertexArrayObject).elementArrayBuffer;
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}
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/**
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* Simple class to help us track VAO state. Currently
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* only ELEMENT_ARRAY_BUFFER_BINDING is tracked, since
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* that's the only state we check from tables 6.6-6.9.
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*/
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private static class VAOState {
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int elementArrayBuffer;
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}
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} |