1 /* 2 * Copyright (c) 2002-2008 LWJGL Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * * Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * * Neither the name of 'LWJGL' nor the names of 17 * its contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 package org.lwjgl.opengl; 33 34 import java.nio.Buffer; 35 import java.util.Arrays; 36 37 import static org.lwjgl.opengl.GL11.*; 38 import static org.lwjgl.opengl.GL13.*; 39 import static org.lwjgl.opengl.GL20.*; 40 41 class BaseReferences { 42 43 int elementArrayBuffer; 44 int arrayBuffer; 45 final Buffer[] glVertexAttribPointer_buffer; 46 final Buffer[] glTexCoordPointer_buffer; 47 int glClientActiveTexture; 48 49 int vertexArrayObject; 50 51 int pixelPackBuffer; 52 int pixelUnpackBuffer; 53 54 int indirectBuffer; 55 BaseReferences(ContextCapabilities caps)56 BaseReferences(ContextCapabilities caps) { 57 int max_vertex_attribs; 58 if ( caps.OpenGL20 || caps.GL_ARB_vertex_shader ) 59 max_vertex_attribs = glGetInteger(GL_MAX_VERTEX_ATTRIBS); 60 else 61 max_vertex_attribs = 0; 62 glVertexAttribPointer_buffer = new Buffer[max_vertex_attribs]; 63 64 int max_texture_units; 65 if ( caps.OpenGL20 ) 66 max_texture_units = glGetInteger(GL_MAX_TEXTURE_IMAGE_UNITS); 67 else if ( caps.OpenGL13 || caps.GL_ARB_multitexture ) 68 max_texture_units = glGetInteger(GL_MAX_TEXTURE_UNITS); 69 else 70 max_texture_units = 1; 71 glTexCoordPointer_buffer = new Buffer[max_texture_units]; 72 } 73 clear()74 void clear() { 75 this.elementArrayBuffer = 0; 76 this.arrayBuffer = 0; 77 this.glClientActiveTexture = 0; 78 Arrays.fill(glVertexAttribPointer_buffer, null); 79 Arrays.fill(glTexCoordPointer_buffer, null); 80 81 this.vertexArrayObject = 0; 82 83 this.pixelPackBuffer = 0; 84 this.pixelUnpackBuffer = 0; 85 86 this.indirectBuffer = 0; 87 } 88 copy(BaseReferences references, int mask)89 void copy(BaseReferences references, int mask) { 90 if ( (mask & GL_CLIENT_VERTEX_ARRAY_BIT) != 0 ) { 91 this.elementArrayBuffer = references.elementArrayBuffer; 92 this.arrayBuffer = references.arrayBuffer; 93 this.glClientActiveTexture = references.glClientActiveTexture; 94 System.arraycopy(references.glVertexAttribPointer_buffer, 0, glVertexAttribPointer_buffer, 0, glVertexAttribPointer_buffer.length); 95 System.arraycopy(references.glTexCoordPointer_buffer, 0, glTexCoordPointer_buffer, 0, glTexCoordPointer_buffer.length); 96 97 this.vertexArrayObject = references.vertexArrayObject; 98 99 this.indirectBuffer = references.indirectBuffer; 100 } 101 102 if ( (mask & GL_CLIENT_PIXEL_STORE_BIT) != 0 ) { 103 this.pixelPackBuffer = references.pixelPackBuffer; 104 this.pixelUnpackBuffer = references.pixelUnpackBuffer; 105 } 106 } 107 } 108