343 lines
12 KiB
Java
343 lines
12 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 org.lwjgl.BufferUtils;
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import org.lwjgl.LWJGLUtil;
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import java.nio.Buffer;
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import java.nio.FloatBuffer;
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import static org.lwjgl.opengl.ARBBufferObject.*;
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import static org.lwjgl.opengl.ATIVertexArrayObject.*;
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import static org.lwjgl.opengl.EXTAbgr.*;
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import static org.lwjgl.opengl.EXTBgra.*;
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import static org.lwjgl.opengl.EXTDirectStateAccess.*;
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import static org.lwjgl.opengl.GL11.*;
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import static org.lwjgl.opengl.GL13.*;
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import static org.lwjgl.opengl.GL15.*;
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import static org.lwjgl.opengl.NVPathRendering.*;
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/**
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* A class to check buffer boundaries in GL methods. Many GL
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* methods read data from the GL into a native Buffer at its current position. If there is unsufficient space in the buffer when
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* the call is made then a buffer overflow would otherwise occur and cause unexpected behaviour, a crash, or worse, a security
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* risk. Therefore in those methods where GL reads data back into a buffer, we will call a bounds check method from this class
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* to ensure that there is sufficient space in the buffer.
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* <p/>
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* Thrown by the debug build library of the LWJGL if any OpenGL operation causes an error.
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*
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* @author cix_foo <cix_foo@users.sourceforge.net>
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* @version $Revision$
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* $Id$
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*/
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class GLChecks {
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/** Static methods only! */
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private GLChecks() {
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}
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/** Helper method to ensure that array buffer objects are disabled. If they are enabled, we'll throw an OpenGLException */
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static void ensureArrayVBOdisabled(ContextCapabilities caps) {
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if ( LWJGLUtil.CHECKS && StateTracker.getReferences(caps).arrayBuffer != 0 )
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throw new OpenGLException("Cannot use Buffers when Array Buffer Object is enabled");
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}
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/** Helper method to ensure that array buffer objects are enabled. If they are disabled, we'll throw an OpenGLException */
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static void ensureArrayVBOenabled(ContextCapabilities caps) {
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if ( LWJGLUtil.CHECKS && StateTracker.getReferences(caps).arrayBuffer == 0 )
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throw new OpenGLException("Cannot use offsets when Array Buffer Object is disabled");
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}
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/** Helper method to ensure that element array buffer objects are disabled. If they are enabled, we'll throw an OpenGLException */
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static void ensureElementVBOdisabled(ContextCapabilities caps) {
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if ( LWJGLUtil.CHECKS && StateTracker.getElementArrayBufferBound(caps) != 0 )
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throw new OpenGLException("Cannot use Buffers when Element Array Buffer Object is enabled");
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}
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/** Helper method to ensure that element array buffer objects are enabled. If they are disabled, we'll throw an OpenGLException */
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static void ensureElementVBOenabled(ContextCapabilities caps) {
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if ( LWJGLUtil.CHECKS && StateTracker.getElementArrayBufferBound(caps) == 0 )
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throw new OpenGLException("Cannot use offsets when Element Array Buffer Object is disabled");
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}
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/** Helper method to ensure that array buffer objects are disabled. If they are enabled, we'll throw an OpenGLException */
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static void ensureIndirectBOdisabled(ContextCapabilities caps) {
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if ( LWJGLUtil.CHECKS && StateTracker.getReferences(caps).indirectBuffer != 0 )
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throw new OpenGLException("Cannot use Buffers when Draw Indirect Object is enabled");
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}
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/** Helper method to ensure that array buffer objects are enabled. If they are disabled, we'll throw an OpenGLException */
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static void ensureIndirectBOenabled(ContextCapabilities caps) {
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if ( LWJGLUtil.CHECKS && StateTracker.getReferences(caps).indirectBuffer == 0 )
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throw new OpenGLException("Cannot use offsets when Draw Indirect Object is disabled");
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}
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/** Helper method to ensure that pixel pack buffer objects are disabled. If they are enabled, we'll throw an OpenGLException */
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static void ensurePackPBOdisabled(ContextCapabilities caps) {
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if ( LWJGLUtil.CHECKS && StateTracker.getReferences(caps).pixelPackBuffer != 0 )
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throw new OpenGLException("Cannot use Buffers when Pixel Pack Buffer Object is enabled");
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}
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/** Helper method to ensure that pixel pack buffer objects are enabled. If they are disabled, we'll throw an OpenGLException */
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static void ensurePackPBOenabled(ContextCapabilities caps) {
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if ( LWJGLUtil.CHECKS && StateTracker.getReferences(caps).pixelPackBuffer == 0 )
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throw new OpenGLException("Cannot use offsets when Pixel Pack Buffer Object is disabled");
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}
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/** Helper method to ensure that pixel unpack buffer objects are disabled. If they are enabled, we'll throw an OpenGLException */
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static void ensureUnpackPBOdisabled(ContextCapabilities caps) {
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if ( LWJGLUtil.CHECKS && StateTracker.getReferences(caps).pixelUnpackBuffer != 0 )
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throw new OpenGLException("Cannot use Buffers when Pixel Unpack Buffer Object is enabled");
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}
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/** Helper method to ensure that pixel unpack buffer objects are enabled. If they are disabled, we'll throw an OpenGLException */
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static void ensureUnpackPBOenabled(ContextCapabilities caps) {
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if ( LWJGLUtil.CHECKS && StateTracker.getReferences(caps).pixelUnpackBuffer == 0 )
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throw new OpenGLException("Cannot use offsets when Pixel Unpack Buffer Object is disabled");
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}
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/**
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* Calculate the storage required for an image in elements
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*
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* @param format The format of the image (example: GL_RGBA)
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* @param type The type of the image elements (example: GL_UNSIGNED_BYTE)
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* @param width The width of the image
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* @param height The height of the image (1 for 1D images)
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* @param depth The depth of the image (1 for 2D images)
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*
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* @return the size, in elements, of the image
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*/
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static int calculateImageStorage(Buffer buffer, int format, int type, int width, int height, int depth) {
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return LWJGLUtil.CHECKS ? calculateImageStorage(format, type, width, height, depth) >> BufferUtils.getElementSizeExponent(buffer) : 0;
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}
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static int calculateTexImage1DStorage(Buffer buffer, int format, int type, int width) {
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return LWJGLUtil.CHECKS ? calculateTexImage1DStorage(format, type, width) >> BufferUtils.getElementSizeExponent(buffer) : 0;
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}
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static int calculateTexImage2DStorage(Buffer buffer, int format, int type, int width, int height) {
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return LWJGLUtil.CHECKS ? calculateTexImage2DStorage(format, type, width, height) >> BufferUtils.getElementSizeExponent(buffer) : 0;
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}
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static int calculateTexImage3DStorage(Buffer buffer, int format, int type, int width, int height, int depth) {
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return LWJGLUtil.CHECKS ? calculateTexImage3DStorage(format, type, width, height, depth) >> BufferUtils.getElementSizeExponent(buffer) : 0;
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}
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/**
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* Calculate the storage required for an image in bytes.
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*
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* @param format The format of the image (example: GL_RGBA)
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* @param type The type of the image elements (example: GL_UNSIGNED_BYTE)
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* @param width The width of the image
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* @param height The height of the image (1 for 1D images)
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* @param depth The depth of the image (1 for 2D images)
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*
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* @return the size, in bytes, of the image
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*/
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private static int calculateImageStorage(int format, int type, int width, int height, int depth) {
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return calculateBytesPerPixel(format, type) * width * height * depth;
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}
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private static int calculateTexImage1DStorage(int format, int type, int width) {
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return calculateBytesPerPixel(format, type) * width;
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}
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private static int calculateTexImage2DStorage(int format, int type, int width, int height) {
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return calculateTexImage1DStorage(format, type, width) * height;
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}
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private static int calculateTexImage3DStorage(int format, int type, int width, int height, int depth) {
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return calculateTexImage2DStorage(format, type, width, height) * depth;
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}
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private static int calculateBytesPerPixel(int format, int type) {
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int bpe;
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switch ( type ) {
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case GL_UNSIGNED_BYTE:
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case GL_BYTE:
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bpe = 1;
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break;
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case GL_UNSIGNED_SHORT:
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case GL_SHORT:
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bpe = 2;
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break;
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case GL_UNSIGNED_INT:
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case GL_INT:
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case GL_FLOAT:
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bpe = 4;
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break;
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default:
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// TODO: Add more types (like the GL12 types GL_UNSIGNED_INT_8_8_8_8
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return 0;
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// throw new IllegalArgumentException("Unknown type " + type);
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}
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int epp;
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switch ( format ) {
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case GL_LUMINANCE:
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case GL_ALPHA:
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epp = 1;
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break;
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case GL_LUMINANCE_ALPHA:
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epp = 2;
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break;
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case GL_RGB:
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case GL_BGR_EXT:
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epp = 3;
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break;
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case GL_RGBA:
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case GL_ABGR_EXT:
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case GL_BGRA_EXT:
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epp = 4;
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break;
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default:
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// TODO: Add more formats. Assuming 4 is too wasteful on buffer sizes where e.g. 1 is enough (like GL_DEPTH_COMPONENT)
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return 0;
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/* // Assume 4 elements per pixel
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epp = 4;*/
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}
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return bpe * epp;
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}
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// NV_path_rendering checks
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static int calculateBytesPerCharCode(int type) {
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switch ( type ) {
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case GL_UNSIGNED_BYTE:
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case GL_UTF8_NV:
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return 1;
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case GL_UNSIGNED_SHORT:
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case GL_2_BYTES:
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case GL_UTF16_NV:
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return 2;
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case GL_3_BYTES:
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return 3;
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case GL_4_BYTES:
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return 4;
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default:
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throw new IllegalArgumentException("Unsupported charcode type: " + type);
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}
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}
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static int calculateBytesPerPathName(int pathNameType) {
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switch ( pathNameType ) {
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case GL_BYTE:
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case GL_UNSIGNED_BYTE:
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case GL_UTF8_NV:
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return 1;
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case GL_SHORT:
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case GL_UNSIGNED_SHORT:
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case GL_2_BYTES:
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case GL_UTF16_NV:
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return 2;
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case GL_3_BYTES:
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return 3;
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case GL_INT:
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case GL_UNSIGNED_INT:
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case GL_FLOAT:
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case GL_4_BYTES:
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return 4;
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default:
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throw new IllegalArgumentException("Unsupported path name type: " + pathNameType);
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}
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}
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static int calculateTransformPathValues(int transformType) {
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switch ( transformType ) {
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case GL_NONE:
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return 0;
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case GL_TRANSLATE_X_NV:
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case GL_TRANSLATE_Y_NV:
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return 1;
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case GL_TRANSLATE_2D_NV:
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return 2;
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case GL_TRANSLATE_3D_NV:
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return 3;
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case GL_AFFINE_2D_NV:
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case GL_TRANSPOSE_AFFINE_2D_NV:
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return 6;
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case GL_AFFINE_3D_NV:
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case GL_TRANSPOSE_AFFINE_3D_NV:
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return 12;
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default:
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throw new IllegalArgumentException("Unsupported transform type: " + transformType);
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}
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}
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static int calculatePathColorGenModeElements(int genMode) {
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switch ( genMode ) {
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case GL_NONE:
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return 0;
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case GL_CONSTANT:
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return 1;
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case GL_OBJECT_LINEAR:
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case GL_PATH_OBJECT_BOUNDING_BOX_NV:
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return 3;
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case GL_EYE_LINEAR:
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return 4;
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default:
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throw new IllegalArgumentException(String.format("Unsupported genMode specified: 0x%X", genMode));
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}
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}
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static int calculatePathColorGenFormatComponents(int colorFormat) {
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switch ( colorFormat ) {
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case GL_LUMINANCE:
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case GL_INTENSITY:
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case GL_ALPHA:
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return 1;
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case GL_LUMINANCE_ALPHA:
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return 2;
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case GL_RGB:
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return 3;
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case GL_RGBA:
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return 4;
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default:
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throw new IllegalArgumentException(String.format("Unsupported colorFormat specified: 0x%X", colorFormat));
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}
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}
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static int calculateMetricsSize(int metricQueryMask, int stride) {
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if ( LWJGLUtil.DEBUG && (stride < 0 || (stride % 4) != 0) )
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throw new IllegalArgumentException("Invalid stride value: " + stride);
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final int metrics = Integer.bitCount(metricQueryMask);
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if ( LWJGLUtil.DEBUG && (stride >> 2) < metrics )
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throw new IllegalArgumentException("The queried metrics do not fit in the specified stride: " + stride);
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return stride == 0 ? metrics : (stride >> 2);
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}
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} |