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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the implementation of the StreamBankCB class.
#include "core/cross/precompile.h"
#include "core/cross/command_buffer/param_cache_cb.h"
#include "core/cross/command_buffer/primitive_cb.h"
#include "core/cross/command_buffer/renderer_cb.h"
#include "core/cross/command_buffer/buffer_cb.h"
#include "core/cross/command_buffer/effect_cb.h"
#include "core/cross/command_buffer/stream_bank_cb.h"
#include "command_buffer/common/cross/gapi_interface.h"
#include "command_buffer/client/cross/cmd_buffer_helper.h"
// TODO: add unit tests.
namespace o3d {
using command_buffer::ResourceId;
using command_buffer::CommandBufferHelper;
using command_buffer::CommandBufferEntry;
using command_buffer::GAPIInterface;
using command_buffer::kInvalidResource;
namespace vertex_struct = command_buffer::vertex_struct;
StreamBankCB::StreamBankCB(ServiceLocator* service_locator,
RendererCB *renderer)
: StreamBank(service_locator),
renderer_(renderer),
vertex_struct_id_(kInvalidResource) {
}
StreamBankCB::~StreamBankCB() {
DestroyVertexStruct();
}
// Converts a semantic/index pair from the O3D conventions to the command
// buffer conventions.
static bool GetCBSemantic(
Stream::Semantic semantic,
unsigned int semantic_index,
vertex_struct::Semantic *out_semantic,
unsigned int *out_semantic_index) {
// TODO: what meaning do we really want to put to our semantics ? How
// do they match the semantics that are set in the effect ? What combination
// of (semantic, index) are supposed to work ?
switch (semantic) {
case Stream::POSITION:
if (semantic_index != 0) return false;
*out_semantic = vertex_struct::kPosition;
*out_semantic_index = 0;
return true;
case Stream::NORMAL:
if (semantic_index != 0) return false;
*out_semantic = vertex_struct::kNormal;
*out_semantic_index = 0;
return true;
case Stream::TANGENT:
if (semantic_index != 0) return false;
*out_semantic = vertex_struct::kTexCoord;
*out_semantic_index = 6;
return true;
case Stream::BINORMAL:
if (semantic_index != 0) return false;
*out_semantic = vertex_struct::kTexCoord;
*out_semantic_index = 7;
return true;
case Stream::COLOR:
if (semantic_index > 1) return false;
*out_semantic = vertex_struct::kColor;
*out_semantic_index = semantic_index;
return true;
case Stream::TEXCOORD:
*out_semantic = vertex_struct::kTexCoord;
*out_semantic_index = semantic_index;
return true;
default:
return false;
}
}
// Converts a data type from O3D enum values to command-buffer enum values.
static vertex_struct::Type GetCBType(const Field& field) {
if (field.IsA(FloatField::GetApparentClass())) {
switch (field.num_components()) {
case 1:
return vertex_struct::kFloat1;
case 2:
return vertex_struct::kFloat3;
case 3:
return vertex_struct::kFloat3;
case 4:
return vertex_struct::kFloat4;
}
} else if (field.IsA(UByteNField::GetApparentClass())) {
switch (field.num_components()) {
case 4:
return vertex_struct::kUChar4N;
}
}
DLOG(ERROR) << "Unknown Stream DataType";
return vertex_struct::kNumTypes;
}
// This function is overridden so that we can invalidate the vertex struct any
// time the streams change.
void StreamBankCB::OnUpdateStreams() {
DestroyVertexStruct();
}
// Creates the vertex struct resource on the service side. It will only set the
// vertex inputs if they represent semantics and types we know about. The
// command buffer API will not draw with an incomplete vertex struct.
// This function will get called on Draw, after any change to the vertex inputs
// has occurred.
void StreamBankCB::CreateVertexStruct() {
DCHECK_EQ(kInvalidResource, vertex_struct_id_);
vertex_struct_id_ = renderer_->vertex_structs_ids().AllocateID();
CommandBufferHelper *helper = renderer_->helper();
helper->CreateVertexStruct(vertex_struct_id_, vertex_stream_params_.size());
for (unsigned int i = 0; i < vertex_stream_params_.size(); ++i) {
const Stream &stream = vertex_stream_params_[i]->stream();
vertex_struct::Semantic cb_semantic;
unsigned int cb_semantic_index;
if (!GetCBSemantic(stream.semantic(), stream.semantic_index(), &cb_semantic,
&cb_semantic_index)) {
DLOG(INFO) << "Unknown semantic (" << stream.semantic() << ", "
<< stream.semantic_index() << ") - ignoring stream.";
continue;
}
vertex_struct::Type cb_type = GetCBType(stream.field());
if (cb_type == vertex_struct::kNumTypes) {
DLOG(INFO) << "Invalid type (" << stream.field().num_components()
<< ") - ignoring stream.";
continue;
}
VertexBufferCB *vertex_buffer =
static_cast<VertexBufferCB *>(stream.field().buffer());
helper->SetVertexInput(
vertex_struct_id_, i,
vertex_buffer->resource_id(),
stream.field().offset(),
cb_semantic,
cb_semantic_index,
cb_type,
vertex_buffer->stride());
}
}
// Destroys the vertex struct resource on the service side.
void StreamBankCB::DestroyVertexStruct() {
if (vertex_struct_id_ != kInvalidResource) {
CommandBufferHelper *helper = renderer_->helper();
helper->DestroyVertexStruct(vertex_struct_id_);
renderer_->vertex_structs_ids().FreeID(vertex_struct_id_);
vertex_struct_id_ = kInvalidResource;
}
}
void StreamBankCB::BindStreamsForRendering() {
if (vertex_struct_id_ == kInvalidResource)
CreateVertexStruct();
CommandBufferHelper *helper = renderer_->helper();
helper->SetVertexStruct(vertex_struct_id_);
}
} // namespace o3d
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