michael@0: #include "precompiled.h"
michael@0: //
michael@0: // Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: //
michael@0: 
michael@0: // Buffer.cpp: Implements the gl::Buffer class, representing storage of vertex and/or
michael@0: // index data. Implements GL buffer objects and related functionality.
michael@0: // [OpenGL ES 2.0.24] section 2.9 page 21.
michael@0: 
michael@0: #include "libGLESv2/Buffer.h"
michael@0: 
michael@0: #include "libGLESv2/renderer/VertexBuffer.h"
michael@0: #include "libGLESv2/renderer/IndexBuffer.h"
michael@0: #include "libGLESv2/renderer/BufferStorage.h"
michael@0: #include "libGLESv2/renderer/Renderer.h"
michael@0: 
michael@0: namespace gl
michael@0: {
michael@0: 
michael@0: Buffer::Buffer(rx::Renderer *renderer, GLuint id) : RefCountObject(id)
michael@0: {
michael@0:     mRenderer = renderer;
michael@0:     mUsage = GL_DYNAMIC_DRAW;
michael@0: 
michael@0:     mBufferStorage = renderer->createBufferStorage();
michael@0:     mStaticVertexBuffer = NULL;
michael@0:     mStaticIndexBuffer = NULL;
michael@0:     mUnmodifiedDataUse = 0;
michael@0: }
michael@0: 
michael@0: Buffer::~Buffer()
michael@0: {
michael@0:     delete mBufferStorage;
michael@0:     delete mStaticVertexBuffer;
michael@0:     delete mStaticIndexBuffer;
michael@0: }
michael@0: 
michael@0: void Buffer::bufferData(const void *data, GLsizeiptr size, GLenum usage)
michael@0: {
michael@0:     mBufferStorage->clear();
michael@0:     mIndexRangeCache.clear();
michael@0:     mBufferStorage->setData(data, size, 0);
michael@0: 
michael@0:     mUsage = usage;
michael@0: 
michael@0:     invalidateStaticData();
michael@0: 
michael@0:     if (usage == GL_STATIC_DRAW)
michael@0:     {
michael@0:         mStaticVertexBuffer = new rx::StaticVertexBufferInterface(mRenderer);
michael@0:         mStaticIndexBuffer = new rx::StaticIndexBufferInterface(mRenderer);
michael@0:     }
michael@0: }
michael@0: 
michael@0: void Buffer::bufferSubData(const void *data, GLsizeiptr size, GLintptr offset)
michael@0: {
michael@0:     mBufferStorage->setData(data, size, offset);
michael@0:     mIndexRangeCache.invalidateRange(offset, size);
michael@0: 
michael@0:     if ((mStaticVertexBuffer && mStaticVertexBuffer->getBufferSize() != 0) || (mStaticIndexBuffer && mStaticIndexBuffer->getBufferSize() != 0))
michael@0:     {
michael@0:         invalidateStaticData();
michael@0:     }
michael@0: 
michael@0:     mUnmodifiedDataUse = 0;
michael@0: }
michael@0: 
michael@0: rx::BufferStorage *Buffer::getStorage() const
michael@0: {
michael@0:     return mBufferStorage;
michael@0: }
michael@0: 
michael@0: unsigned int Buffer::size()
michael@0: {
michael@0:     return mBufferStorage->getSize();
michael@0: }
michael@0: 
michael@0: GLenum Buffer::usage() const
michael@0: {
michael@0:     return mUsage;
michael@0: }
michael@0: 
michael@0: rx::StaticVertexBufferInterface *Buffer::getStaticVertexBuffer()
michael@0: {
michael@0:     return mStaticVertexBuffer;
michael@0: }
michael@0: 
michael@0: rx::StaticIndexBufferInterface *Buffer::getStaticIndexBuffer()
michael@0: {
michael@0:     return mStaticIndexBuffer;
michael@0: }
michael@0: 
michael@0: void Buffer::invalidateStaticData()
michael@0: {
michael@0:     delete mStaticVertexBuffer;
michael@0:     mStaticVertexBuffer = NULL;
michael@0: 
michael@0:     delete mStaticIndexBuffer;
michael@0:     mStaticIndexBuffer = NULL;
michael@0: 
michael@0:     mUnmodifiedDataUse = 0;
michael@0: }
michael@0: 
michael@0: // Creates static buffers if sufficient used data has been left unmodified
michael@0: void Buffer::promoteStaticUsage(int dataSize)
michael@0: {
michael@0:     if (!mStaticVertexBuffer && !mStaticIndexBuffer)
michael@0:     {
michael@0:         mUnmodifiedDataUse += dataSize;
michael@0: 
michael@0:         if (mUnmodifiedDataUse > 3 * mBufferStorage->getSize())
michael@0:         {
michael@0:             mStaticVertexBuffer = new rx::StaticVertexBufferInterface(mRenderer);
michael@0:             mStaticIndexBuffer = new rx::StaticIndexBufferInterface(mRenderer);
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: rx::IndexRangeCache *Buffer::getIndexRangeCache()
michael@0: {
michael@0:     return &mIndexRangeCache;
michael@0: }
michael@0: 
michael@0: }