diff options
Diffstat (limited to 'src/3rdparty/angle/src/libGLESv2/Buffer.cpp')
-rw-r--r-- | src/3rdparty/angle/src/libGLESv2/Buffer.cpp | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libGLESv2/Buffer.cpp b/src/3rdparty/angle/src/libGLESv2/Buffer.cpp new file mode 100644 index 0000000000..dd12e3c077 --- /dev/null +++ b/src/3rdparty/angle/src/libGLESv2/Buffer.cpp @@ -0,0 +1,117 @@ +// +// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +// + +// Buffer.cpp: Implements the gl::Buffer class, representing storage of vertex and/or +// index data. Implements GL buffer objects and related functionality. +// [OpenGL ES 2.0.24] section 2.9 page 21. + +#include "libGLESv2/Buffer.h" + +#include "libGLESv2/main.h" +#include "libGLESv2/VertexDataManager.h" +#include "libGLESv2/IndexDataManager.h" + +namespace gl +{ + +Buffer::Buffer(GLuint id) : RefCountObject(id) +{ + mContents = NULL; + mSize = 0; + mUsage = GL_DYNAMIC_DRAW; + + mStaticVertexBuffer = NULL; + mStaticIndexBuffer = NULL; + mUnmodifiedDataUse = 0; +} + +Buffer::~Buffer() +{ + delete[] mContents; + delete mStaticVertexBuffer; + delete mStaticIndexBuffer; +} + +void Buffer::bufferData(const void *data, GLsizeiptr size, GLenum usage) +{ + if (size == 0) + { + delete[] mContents; + mContents = NULL; + } + else if (size != mSize) + { + delete[] mContents; + mContents = new GLubyte[size]; + memset(mContents, 0, size); + } + + if (data != NULL && size > 0) + { + memcpy(mContents, data, size); + } + + mSize = size; + mUsage = usage; + + invalidateStaticData(); + + if (usage == GL_STATIC_DRAW) + { + mStaticVertexBuffer = new StaticVertexBuffer(getDevice()); + mStaticIndexBuffer = new StaticIndexBuffer(getDevice()); + } +} + +void Buffer::bufferSubData(const void *data, GLsizeiptr size, GLintptr offset) +{ + memcpy(mContents + offset, data, size); + + if ((mStaticVertexBuffer && mStaticVertexBuffer->size() != 0) || (mStaticIndexBuffer && mStaticIndexBuffer->size() != 0)) + { + invalidateStaticData(); + } + + mUnmodifiedDataUse = 0; +} + +StaticVertexBuffer *Buffer::getStaticVertexBuffer() +{ + return mStaticVertexBuffer; +} + +StaticIndexBuffer *Buffer::getStaticIndexBuffer() +{ + return mStaticIndexBuffer; +} + +void Buffer::invalidateStaticData() +{ + delete mStaticVertexBuffer; + mStaticVertexBuffer = NULL; + + delete mStaticIndexBuffer; + mStaticIndexBuffer = NULL; + + mUnmodifiedDataUse = 0; +} + +// Creates static buffers if sufficient used data has been left unmodified +void Buffer::promoteStaticUsage(int dataSize) +{ + if (!mStaticVertexBuffer && !mStaticIndexBuffer) + { + mUnmodifiedDataUse += dataSize; + + if (mUnmodifiedDataUse > 3 * mSize) + { + mStaticVertexBuffer = new StaticVertexBuffer(getDevice()); + mStaticIndexBuffer = new StaticIndexBuffer(getDevice()); + } + } +} + +} |