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#include "precompiled.h"
//
// Copyright (c) 2012 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.
//
// VertexDeclarationCache.cpp: Implements a helper class to construct and cache vertex declarations.
#include "libGLESv2/ProgramBinary.h"
#include "libGLESv2/Context.h"
#include "libGLESv2/renderer/VertexBuffer9.h"
#include "libGLESv2/renderer/VertexDeclarationCache.h"
namespace rx
{
VertexDeclarationCache::VertexDeclarationCache() : mMaxLru(0)
{
for (int i = 0; i < NUM_VERTEX_DECL_CACHE_ENTRIES; i++)
{
mVertexDeclCache[i].vertexDeclaration = NULL;
mVertexDeclCache[i].lruCount = 0;
}
for (int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
{
mAppliedVBs[i].serial = 0;
}
mLastSetVDecl = NULL;
mInstancingEnabled = true;
}
VertexDeclarationCache::~VertexDeclarationCache()
{
for (int i = 0; i < NUM_VERTEX_DECL_CACHE_ENTRIES; i++)
{
if (mVertexDeclCache[i].vertexDeclaration)
{
mVertexDeclCache[i].vertexDeclaration->Release();
}
}
}
GLenum VertexDeclarationCache::applyDeclaration(IDirect3DDevice9 *device, TranslatedAttribute attributes[], gl::ProgramBinary *programBinary, GLsizei instances, GLsizei *repeatDraw)
{
*repeatDraw = 1;
int indexedAttribute = gl::MAX_VERTEX_ATTRIBS;
int instancedAttribute = gl::MAX_VERTEX_ATTRIBS;
if (instances > 0)
{
// Find an indexed attribute to be mapped to D3D stream 0
for (int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
{
if (attributes[i].active)
{
if (indexedAttribute == gl::MAX_VERTEX_ATTRIBS && attributes[i].divisor == 0)
{
indexedAttribute = i;
}
else if (instancedAttribute == gl::MAX_VERTEX_ATTRIBS && attributes[i].divisor != 0)
{
instancedAttribute = i;
}
if (indexedAttribute != gl::MAX_VERTEX_ATTRIBS && instancedAttribute != gl::MAX_VERTEX_ATTRIBS)
break; // Found both an indexed and instanced attribute
}
}
if (indexedAttribute == gl::MAX_VERTEX_ATTRIBS)
{
return GL_INVALID_OPERATION;
}
}
D3DVERTEXELEMENT9 elements[gl::MAX_VERTEX_ATTRIBS + 1];
D3DVERTEXELEMENT9 *element = &elements[0];
for (int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
{
if (attributes[i].active)
{
// Directly binding the storage buffer is not supported for d3d9
ASSERT(attributes[i].storage == NULL);
int stream = i;
if (instances > 0)
{
// Due to a bug on ATI cards we can't enable instancing when none of the attributes are instanced.
if (instancedAttribute == gl::MAX_VERTEX_ATTRIBS)
{
*repeatDraw = instances;
}
else
{
if (i == indexedAttribute)
{
stream = 0;
}
else if (i == 0)
{
stream = indexedAttribute;
}
UINT frequency = 1;
if (attributes[i].divisor == 0)
{
frequency = D3DSTREAMSOURCE_INDEXEDDATA | instances;
}
else
{
frequency = D3DSTREAMSOURCE_INSTANCEDATA | attributes[i].divisor;
}
device->SetStreamSourceFreq(stream, frequency);
mInstancingEnabled = true;
}
}
VertexBuffer9 *vertexBuffer = VertexBuffer9::makeVertexBuffer9(attributes[i].vertexBuffer);
if (mAppliedVBs[stream].serial != attributes[i].serial ||
mAppliedVBs[stream].stride != attributes[i].stride ||
mAppliedVBs[stream].offset != attributes[i].offset)
{
device->SetStreamSource(stream, vertexBuffer->getBuffer(), attributes[i].offset, attributes[i].stride);
mAppliedVBs[stream].serial = attributes[i].serial;
mAppliedVBs[stream].stride = attributes[i].stride;
mAppliedVBs[stream].offset = attributes[i].offset;
}
element->Stream = stream;
element->Offset = 0;
element->Type = attributes[i].attribute->mArrayEnabled ? vertexBuffer->getDeclType(*attributes[i].attribute) : D3DDECLTYPE_FLOAT4;
element->Method = D3DDECLMETHOD_DEFAULT;
element->Usage = D3DDECLUSAGE_TEXCOORD;
element->UsageIndex = programBinary->getSemanticIndex(i);
element++;
}
}
if (instances == 0 || instancedAttribute == gl::MAX_VERTEX_ATTRIBS)
{
if (mInstancingEnabled)
{
for (int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
{
device->SetStreamSourceFreq(i, 1);
}
mInstancingEnabled = false;
}
}
static const D3DVERTEXELEMENT9 end = D3DDECL_END();
*(element++) = end;
for (int i = 0; i < NUM_VERTEX_DECL_CACHE_ENTRIES; i++)
{
VertexDeclCacheEntry *entry = &mVertexDeclCache[i];
if (memcmp(entry->cachedElements, elements, (element - elements) * sizeof(D3DVERTEXELEMENT9)) == 0 && entry->vertexDeclaration)
{
entry->lruCount = ++mMaxLru;
if(entry->vertexDeclaration != mLastSetVDecl)
{
device->SetVertexDeclaration(entry->vertexDeclaration);
mLastSetVDecl = entry->vertexDeclaration;
}
return GL_NO_ERROR;
}
}
VertexDeclCacheEntry *lastCache = mVertexDeclCache;
for (int i = 0; i < NUM_VERTEX_DECL_CACHE_ENTRIES; i++)
{
if (mVertexDeclCache[i].lruCount < lastCache->lruCount)
{
lastCache = &mVertexDeclCache[i];
}
}
if (lastCache->vertexDeclaration != NULL)
{
lastCache->vertexDeclaration->Release();
lastCache->vertexDeclaration = NULL;
// mLastSetVDecl is set to the replacement, so we don't have to worry
// about it.
}
memcpy(lastCache->cachedElements, elements, (element - elements) * sizeof(D3DVERTEXELEMENT9));
device->CreateVertexDeclaration(elements, &lastCache->vertexDeclaration);
device->SetVertexDeclaration(lastCache->vertexDeclaration);
mLastSetVDecl = lastCache->vertexDeclaration;
lastCache->lruCount = ++mMaxLru;
return GL_NO_ERROR;
}
void VertexDeclarationCache::markStateDirty()
{
for (int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
{
mAppliedVBs[i].serial = 0;
}
mLastSetVDecl = NULL;
mInstancingEnabled = true; // Forces it to be disabled when not used
}
}
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