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      1 /*
      2  * Copyright (C) 2011 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 
     28 #include "core/html/canvas/WebGLVertexArrayObjectOES.h"
     29 
     30 #include "core/html/canvas/WebGLRenderingContext.h"
     31 #include "platform/graphics/Extensions3D.h"
     32 
     33 namespace WebCore {
     34 
     35 PassRefPtr<WebGLVertexArrayObjectOES> WebGLVertexArrayObjectOES::create(WebGLRenderingContext* ctx, VaoType type)
     36 {
     37     return adoptRef(new WebGLVertexArrayObjectOES(ctx, type));
     38 }
     39 
     40 WebGLVertexArrayObjectOES::WebGLVertexArrayObjectOES(WebGLRenderingContext* ctx, VaoType type)
     41     : WebGLContextObject(ctx)
     42     , m_type(type)
     43     , m_hasEverBeenBound(false)
     44     , m_boundElementArrayBuffer(0)
     45 {
     46     ScriptWrappable::init(this);
     47     m_vertexAttribState.resize(ctx->maxVertexAttribs());
     48 
     49     Extensions3D* extensions = context()->graphicsContext3D()->extensions();
     50     switch (m_type) {
     51     case VaoTypeDefault:
     52         break;
     53     default:
     54         setObject(extensions->createVertexArrayOES());
     55         break;
     56     }
     57 }
     58 
     59 WebGLVertexArrayObjectOES::~WebGLVertexArrayObjectOES()
     60 {
     61     deleteObject(0);
     62 }
     63 
     64 void WebGLVertexArrayObjectOES::deleteObjectImpl(GraphicsContext3D* context3d, Platform3DObject object)
     65 {
     66     Extensions3D* extensions = context3d->extensions();
     67     switch (m_type) {
     68     case VaoTypeDefault:
     69         break;
     70     default:
     71         extensions->deleteVertexArrayOES(object);
     72         break;
     73     }
     74 
     75     if (m_boundElementArrayBuffer)
     76         m_boundElementArrayBuffer->onDetached(context3d);
     77 
     78     for (size_t i = 0; i < m_vertexAttribState.size(); ++i) {
     79         VertexAttribState& state = m_vertexAttribState[i];
     80         if (state.bufferBinding)
     81             state.bufferBinding->onDetached(context3d);
     82     }
     83 }
     84 
     85 void WebGLVertexArrayObjectOES::setElementArrayBuffer(PassRefPtr<WebGLBuffer> buffer)
     86 {
     87     if (buffer)
     88         buffer->onAttached();
     89     if (m_boundElementArrayBuffer)
     90         m_boundElementArrayBuffer->onDetached(context()->graphicsContext3D());
     91     m_boundElementArrayBuffer = buffer;
     92 
     93 }
     94 
     95 void WebGLVertexArrayObjectOES::setVertexAttribState(
     96     GC3Duint index, GC3Dsizei bytesPerElement, GC3Dint size, GC3Denum type, GC3Dboolean normalized, GC3Dsizei stride, GC3Dintptr offset, PassRefPtr<WebGLBuffer> buffer)
     97 {
     98     GC3Dsizei validatedStride = stride ? stride : bytesPerElement;
     99 
    100     VertexAttribState& state = m_vertexAttribState[index];
    101 
    102     if (buffer)
    103         buffer->onAttached();
    104     if (state.bufferBinding)
    105         state.bufferBinding->onDetached(context()->graphicsContext3D());
    106 
    107     state.bufferBinding = buffer;
    108     state.bytesPerElement = bytesPerElement;
    109     state.size = size;
    110     state.type = type;
    111     state.normalized = normalized;
    112     state.stride = validatedStride;
    113     state.originalStride = stride;
    114     state.offset = offset;
    115 }
    116 
    117 void WebGLVertexArrayObjectOES::unbindBuffer(PassRefPtr<WebGLBuffer> buffer)
    118 {
    119     if (m_boundElementArrayBuffer == buffer) {
    120         m_boundElementArrayBuffer->onDetached(context()->graphicsContext3D());
    121         m_boundElementArrayBuffer = 0;
    122     }
    123 
    124     for (size_t i = 0; i < m_vertexAttribState.size(); ++i) {
    125         VertexAttribState& state = m_vertexAttribState[i];
    126         if (state.bufferBinding == buffer) {
    127             buffer->onDetached(context()->graphicsContext3D());
    128             state.bufferBinding = 0;
    129         }
    130     }
    131 }
    132 
    133 void WebGLVertexArrayObjectOES::setVertexAttribDivisor(GC3Duint index, GC3Duint divisor)
    134 {
    135     VertexAttribState& state = m_vertexAttribState[index];
    136     state.divisor = divisor;
    137 }
    138 
    139 }
    140