michael@0: #include "precompiled.h"
michael@0: //
michael@0: // Copyright (c) 2012 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: // IndexBuffer11.cpp: Defines the D3D11 IndexBuffer implementation.
michael@0: 
michael@0: #include "libGLESv2/renderer/IndexBuffer11.h"
michael@0: #include "libGLESv2/renderer/Renderer11.h"
michael@0: 
michael@0: namespace rx
michael@0: {
michael@0: 
michael@0: IndexBuffer11::IndexBuffer11(Renderer11 *const renderer) : mRenderer(renderer)
michael@0: {
michael@0:     mBuffer = NULL;
michael@0:     mBufferSize = 0;
michael@0:     mDynamicUsage = false;
michael@0: }
michael@0: 
michael@0: IndexBuffer11::~IndexBuffer11()
michael@0: {
michael@0:     if (mBuffer)
michael@0:     {
michael@0:         mBuffer->Release();
michael@0:         mBuffer = NULL;
michael@0:     }
michael@0: }
michael@0: 
michael@0: bool IndexBuffer11::initialize(unsigned int bufferSize, GLenum indexType, bool dynamic)
michael@0: {
michael@0:     if (mBuffer)
michael@0:     {
michael@0:         mBuffer->Release();
michael@0:         mBuffer = NULL;
michael@0:     }
michael@0: 
michael@0:     updateSerial();
michael@0: 
michael@0:     if (bufferSize > 0)
michael@0:     {
michael@0:         ID3D11Device* dxDevice = mRenderer->getDevice();
michael@0: 
michael@0:         D3D11_BUFFER_DESC bufferDesc;
michael@0:         bufferDesc.ByteWidth = bufferSize;
michael@0:         bufferDesc.Usage = D3D11_USAGE_DYNAMIC;
michael@0:         bufferDesc.BindFlags = D3D11_BIND_INDEX_BUFFER;
michael@0:         bufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
michael@0:         bufferDesc.MiscFlags = 0;
michael@0:         bufferDesc.StructureByteStride = 0;
michael@0: 
michael@0:         HRESULT result = dxDevice->CreateBuffer(&bufferDesc, NULL, &mBuffer);
michael@0:         if (FAILED(result))
michael@0:         {
michael@0:             return false;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     mBufferSize = bufferSize;
michael@0:     mIndexType = indexType;
michael@0:     mDynamicUsage = dynamic;
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: IndexBuffer11 *IndexBuffer11::makeIndexBuffer11(IndexBuffer *indexBuffer)
michael@0: {
michael@0:     ASSERT(HAS_DYNAMIC_TYPE(IndexBuffer11*, indexBuffer));
michael@0:     return static_cast<IndexBuffer11*>(indexBuffer);
michael@0: }
michael@0: 
michael@0: bool IndexBuffer11::mapBuffer(unsigned int offset, unsigned int size, void** outMappedMemory)
michael@0: {
michael@0:     if (mBuffer)
michael@0:     {
michael@0:         // Check for integer overflows and out-out-bounds map requests
michael@0:         if (offset + size < offset || offset + size > mBufferSize)
michael@0:         {
michael@0:             ERR("Index buffer map range is not inside the buffer.");
michael@0:             return false;
michael@0:         }
michael@0: 
michael@0:         ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
michael@0: 
michael@0:         D3D11_MAPPED_SUBRESOURCE mappedResource;
michael@0:         HRESULT result = dxContext->Map(mBuffer, 0, D3D11_MAP_WRITE_NO_OVERWRITE, 0, &mappedResource);
michael@0:         if (FAILED(result))
michael@0:         {
michael@0:             ERR("Index buffer map failed with error 0x%08x", result);
michael@0:             return false;
michael@0:         }
michael@0: 
michael@0:         *outMappedMemory = reinterpret_cast<char*>(mappedResource.pData) + offset;
michael@0:         return true;
michael@0:     }
michael@0:     else
michael@0:     {
michael@0:         ERR("Index buffer not initialized.");
michael@0:         return false;
michael@0:     }
michael@0: }
michael@0: 
michael@0: bool IndexBuffer11::unmapBuffer()
michael@0: {
michael@0:     if (mBuffer)
michael@0:     {
michael@0:         ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
michael@0:         dxContext->Unmap(mBuffer, 0);
michael@0:         return true;
michael@0:     }
michael@0:     else
michael@0:     {
michael@0:         ERR("Index buffer not initialized.");
michael@0:         return false;
michael@0:     }
michael@0: }
michael@0: 
michael@0: GLenum IndexBuffer11::getIndexType() const
michael@0: {
michael@0:     return mIndexType;
michael@0: }
michael@0: 
michael@0: unsigned int IndexBuffer11::getBufferSize() const
michael@0: {
michael@0:     return mBufferSize;
michael@0: }
michael@0: 
michael@0: bool IndexBuffer11::setSize(unsigned int bufferSize, GLenum indexType)
michael@0: {
michael@0:     if (bufferSize > mBufferSize || indexType != mIndexType)
michael@0:     {
michael@0:         return initialize(bufferSize, indexType, mDynamicUsage);
michael@0:     }
michael@0:     else
michael@0:     {
michael@0:         return true;
michael@0:     }
michael@0: }
michael@0: 
michael@0: bool IndexBuffer11::discard()
michael@0: {
michael@0:     if (mBuffer)
michael@0:     {
michael@0:         ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
michael@0: 
michael@0:         D3D11_MAPPED_SUBRESOURCE mappedResource;
michael@0:         HRESULT result = dxContext->Map(mBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
michael@0:         if (FAILED(result))
michael@0:         {
michael@0:             ERR("Index buffer map failed with error 0x%08x", result);
michael@0:             return false;
michael@0:         }
michael@0: 
michael@0:         dxContext->Unmap(mBuffer, 0);
michael@0: 
michael@0:         return true;
michael@0:     }
michael@0:     else
michael@0:     {
michael@0:         ERR("Index buffer not initialized.");
michael@0:         return false;
michael@0:     }
michael@0: }
michael@0: 
michael@0: DXGI_FORMAT IndexBuffer11::getIndexFormat() const
michael@0: {
michael@0:     switch (mIndexType)
michael@0:     {
michael@0:       case GL_UNSIGNED_BYTE:    return DXGI_FORMAT_R16_UINT;
michael@0:       case GL_UNSIGNED_SHORT:   return DXGI_FORMAT_R16_UINT;
michael@0:       case GL_UNSIGNED_INT:     return DXGI_FORMAT_R32_UINT;
michael@0:       default: UNREACHABLE();   return DXGI_FORMAT_UNKNOWN;
michael@0:     }
michael@0: }
michael@0: 
michael@0: ID3D11Buffer *IndexBuffer11::getBuffer() const
michael@0: {
michael@0:     return mBuffer;
michael@0: }
michael@0: 
michael@0: }