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/**************************************************************************
 *
 * Copyright 2011 Jose Fonseca
 * Copyright 2008-2009 VMware, Inc.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 **************************************************************************/


#include <stdio.h>

#include "d3dshader.hpp"
#include "d3d9imports.hpp"


typedef HRESULT
(WINAPI *PD3DXDISASSEMBLESHADER)(
    CONST DWORD *pShader,
    BOOL EnableColorCode,
    LPCSTR pComments,
    LPD3DXBUFFER *ppDisassembly
);


void DumpShader(trace::Writer &writer, const DWORD *tokens)
{
    static BOOL firsttime = TRUE;
    static HMODULE hD3DXModule = NULL;
    static PD3DXDISASSEMBLESHADER pfnD3DXDisassembleShader = NULL;

    if (firsttime) {
        if (!hD3DXModule) {
            unsigned release;
            int version;
            for (release = 0; release <= 1; ++release) {
                /* Version 41 corresponds to Mar 2009 version of DirectX Runtime / SDK */
                for (version = 41; version >= 0; --version) {
                    char filename[256];
                    _snprintf(filename, sizeof(filename),
                              "d3dx9%s%s%u.dll", release ? "" : "d", version ? "_" : "", version);
                    hD3DXModule = LoadLibraryA(filename);
                    if (hD3DXModule)
                        goto found;
                }
            }
found:
            ;
        }

        if (hD3DXModule) {
            if (!pfnD3DXDisassembleShader) {
                pfnD3DXDisassembleShader = (PD3DXDISASSEMBLESHADER)GetProcAddress(hD3DXModule, "D3DXDisassembleShader");
            }
        }

        firsttime = FALSE;
    }

    if (pfnD3DXDisassembleShader) {
        LPD3DXBUFFER pDisassembly = NULL;
        HRESULT hr;

        hr = pfnD3DXDisassembleShader( (DWORD *)tokens, FALSE, NULL, &pDisassembly);
        if (hr == D3D_OK) {
            writer.writeString((const char *)pDisassembly->GetBufferPointer());
        }

        if (pDisassembly) {
            pDisassembly->Release();
        }

        if (hr == D3D_OK) {
            return;
        }
    }

    writer.writeOpaque(tokens);
}