gecko-dev/dom/canvas/WebGLVertexArrayFake.cpp

76 строки
2.1 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebGLVertexArrayFake.h"
#include "GLContext.h"
#include "WebGLContext.h"
namespace mozilla {
WebGLVertexArrayFake::WebGLVertexArrayFake(WebGLContext* webgl)
: WebGLVertexArray(webgl)
, mIsVAO(false)
{ }
void
WebGLVertexArrayFake::BindVertexArrayImpl()
{
// Go through and re-bind all buffers and setup all
// vertex attribute pointers
gl::GLContext* gl = mContext->gl;
WebGLRefPtr<WebGLVertexArray> prevVertexArray = mContext->mBoundVertexArray;
mContext->mBoundVertexArray = this;
WebGLRefPtr<WebGLBuffer> prevBuffer = mContext->mBoundArrayBuffer;
mContext->BindBuffer(LOCAL_GL_ELEMENT_ARRAY_BUFFER, mElementArrayBuffer);
for (size_t i = 0; i < mAttribs.Length(); ++i) {
const WebGLVertexAttribData& vd = mAttribs[i];
mContext->BindBuffer(LOCAL_GL_ARRAY_BUFFER, vd.buf);
if (vd.integer) {
gl->fVertexAttribIPointer(i, vd.size, vd.type, vd.stride,
reinterpret_cast<const GLvoid*>(vd.byteOffset));
} else {
gl->fVertexAttribPointer(i, vd.size, vd.type, vd.normalized, vd.stride,
reinterpret_cast<const GLvoid*>(vd.byteOffset));
}
if (vd.enabled)
gl->fEnableVertexAttribArray(i);
else
gl->fDisableVertexAttribArray(i);
}
size_t len = prevVertexArray->mAttribs.Length();
for (size_t i = mAttribs.Length(); i < len; ++i) {
const WebGLVertexAttribData& vd = prevVertexArray->mAttribs[i];
if (vd.enabled)
gl->fDisableVertexAttribArray(i);
}
mContext->BindBuffer(LOCAL_GL_ARRAY_BUFFER, prevBuffer);
mIsVAO = true;
}
void
WebGLVertexArrayFake::DeleteImpl()
{
mIsVAO = false;
}
bool
WebGLVertexArrayFake::IsVertexArrayImpl()
{
return mIsVAO;
}
} // namespace mozilla