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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 defines a few utilities for Direct3D.
#ifndef O3D_COMMAND_BUFFER_SERVICE_WIN_D3D9_D3D9_UTILS_H_
#define O3D_COMMAND_BUFFER_SERVICE_WIN_D3D9_D3D9_UTILS_H_
#ifndef NOMINMAX
// windows.h defines min() and max() as macros, conflicting with std::min and
// std::max unless NOMINMAX is defined.
#define NOMINMAX
#endif
#include <windows.h>
#include <d3d9.h>
#include <d3dx9.h>
#include <dxerr.h>
#include <algorithm>
#include "command_buffer/common/cross/gapi_interface.h"
#if defined (_DEBUG)
#ifndef HR
#define HR(x) { \
HRESULT hr = x; \
if (FAILED(hr)) { \
LOG(ERROR) << "DirectX error at " << __FILE__ << ":" << __LINE__ \
<< " when calling " << #x << ": " << DXGetErrorStringA(hr); \
} \
}
#endif
#else // _DEBUG
#ifndef HR
#define HR(x) x;
#endif
#endif // _DEBUG
namespace o3d {
namespace command_buffer {
union FloatAndDWORD {
float float_value;
DWORD dword_value;
};
// Bit casts a float into a DWORD. That's what D3D expects for some values.
inline DWORD FloatAsDWORD(float value) {
volatile FloatAndDWORD float_and_dword;
float_and_dword.float_value = value;
return float_and_dword.dword_value;
}
// Clamps a float to [0 .. 1] and maps it to [0 .. 255]
inline unsigned int FloatToClampedByte(float value) {
value = std::min(1.f, std::max(0.f, value));
return static_cast<unsigned int>(value * 255);
}
// Converts a RGBA color into a D3DCOLOR
inline D3DCOLOR RGBAToD3DCOLOR(const RGBA &color) {
return D3DCOLOR_RGBA(FloatToClampedByte(color.red),
FloatToClampedByte(color.green),
FloatToClampedByte(color.blue),
FloatToClampedByte(color.alpha));
}
static bool D3DSemanticToCBSemantic(
D3DDECLUSAGE 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 ?
// TODO(gman): This is just plain wrong! Fix it. Converting binormal to
// texcoord 7 means there will be conflicts if I have both a Binormal and a
// texcoord 7 or 2 binormals both of which we have examples of already in O3D!
switch (semantic) {
case D3DDECLUSAGE_POSITION:
if (semantic_index != 0) return false;
*out_semantic = vertex_struct::kPosition;
*out_semantic_index = 0;
return true;
case D3DDECLUSAGE_NORMAL:
if (semantic_index != 0) return false;
*out_semantic = vertex_struct::kNormal;
*out_semantic_index = 0;
return true;
case D3DDECLUSAGE_TANGENT:
if (semantic_index != 0) return false;
*out_semantic = vertex_struct::kTexCoord;
*out_semantic_index = 6;
return true;
case D3DDECLUSAGE_BINORMAL:
if (semantic_index != 0) return false;
*out_semantic = vertex_struct::kTexCoord;
*out_semantic_index = 7;
return true;
case D3DDECLUSAGE_COLOR:
if (semantic_index > 1) return false;
*out_semantic = vertex_struct::kColor;
*out_semantic_index = semantic_index;
return true;
case D3DDECLUSAGE_TEXCOORD:
*out_semantic = vertex_struct::kTexCoord;
*out_semantic_index = semantic_index;
return true;
default:
return false;
}
}
} // namespace command_buffer
} // namespace o3d
#endif // O3D_COMMAND_BUFFER_SERVICE_WIN_D3D9_D3D9_UTILS_H_
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