gld_driver.c

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/****************************************************************************
*
*                        Mesa 3-D graphics library
*                        Direct3D Driver Interface
*
*  ========================================================================
*
*   Copyright (C) 1991-2004 SciTech Software, 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
*   SCITECH SOFTWARE INC 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.
*
*  ======================================================================
*
* Language:     ANSI C
* Environment:  Windows 9x/2000/XP/XBox (Win32)
*
* Description:  Driver functions and interfaces
*
****************************************************************************/

#define STRICT
#define WIN32_LEAN_AND_MEAN
#include <windows.h>

#include "gld_driver.h"
#include "ddlog.h"
#include "glheader.h"

// For glGetString().
#include "common_x86_asm.h"

//---------------------------------------------------------------------------

static char *szDriverError = "Driver used before initialisation!";

// This holds our dynamically created OpenGL renderer string.
// 256 chars should be plenty - remember that some apps display this.
static char _gldRendererString[256];

static char *szVendor = "SciTech Software, Inc.";

//---------------------------------------------------------------------------

extern BOOL gldGetDXErrorString_DX(HRESULT hr, char *buf, int nBufSize);

extern BOOL gldCreateDrawable_MesaSW(DGL_ctx *ctx, BOOL bPersistantInterface, BOOL bPersistantBuffers);
extern BOOL gldResizeDrawable_MesaSW(DGL_ctx *ctx, BOOL bDefaultDriver, BOOL bPersistantInterface, BOOL bPersistantBuffers);
extern BOOL gldDestroyDrawable_MesaSW(DGL_ctx *ctx);
extern BOOL gldCreatePrivateGlobals_MesaSW(void);
extern BOOL gldDestroyPrivateGlobals_MesaSW(void);
extern BOOL gldBuildPixelformatList_MesaSW(void);
extern BOOL gldInitialiseMesa_MesaSW(DGL_ctx *ctx);
extern BOOL gldSwapBuffers_MesaSW(DGL_ctx *ctx, HDC hDC, HWND hWnd);
extern PROC gldGetProcAddress_MesaSW(LPCSTR a);
extern BOOL gldGetDisplayMode_MesaSW(DGL_ctx *ctx, GLD_displayMode *glddm);

extern BOOL gldCreateDrawable_DX(DGL_ctx *ctx, BOOL bPersistantInterface, BOOL bPersistantBuffers);
extern BOOL gldResizeDrawable_DX(DGL_ctx *ctx, BOOL bDefaultDriver, BOOL bPersistantInterface, BOOL bPersistantBuffers);
extern BOOL gldDestroyDrawable_DX(DGL_ctx *ctx);
extern BOOL gldCreatePrivateGlobals_DX(void);
extern BOOL gldDestroyPrivateGlobals_DX(void);
extern BOOL gldBuildPixelformatList_DX(void);
extern BOOL gldInitialiseMesa_DX(DGL_ctx *ctx);
extern BOOL gldSwapBuffers_DX(DGL_ctx *ctx, HDC hDC, HWND hWnd);
extern PROC gldGetProcAddress_DX(LPCSTR a);
extern BOOL gldGetDisplayMode_DX(DGL_ctx *ctx, GLD_displayMode *glddm);

//---------------------------------------------------------------------------
// NOP functions. Called if proper driver functions are not set.
//---------------------------------------------------------------------------

static BOOL _gldDriverError(void)
{
    ddlogMessage(DDLOG_CRITICAL, szDriverError);
    return FALSE;
}

//---------------------------------------------------------------------------

static BOOL _GetDXErrorString_ERROR(
    HRESULT hr,
    char *buf,
    int nBufSize)
{
    return _gldDriverError();
}

//---------------------------------------------------------------------------

static BOOL _CreateDrawable_ERROR(
    DGL_ctx *ctx,
    BOOL bPersistantInterface,
    BOOL bPersistantBuffers)
{
    return _gldDriverError();
}

//---------------------------------------------------------------------------

static BOOL _ResizeDrawable_ERROR(
    DGL_ctx *ctx,
    BOOL bDefaultDriver,
    BOOL bPersistantInterface,
    BOOL bPersistantBuffers)
{
    return _gldDriverError();
}

//---------------------------------------------------------------------------

static BOOL _DestroyDrawable_ERROR(
    DGL_ctx *ctx)
{
    return _gldDriverError();
}

//---------------------------------------------------------------------------

static BOOL _CreatePrivateGlobals_ERROR(void)
{
    return _gldDriverError();
}

//---------------------------------------------------------------------------

static BOOL _DestroyPrivateGlobals_ERROR(void)
{
    return _gldDriverError();
}

//---------------------------------------------------------------------------

static BOOL _BuildPixelformatList_ERROR(void)
{
    return _gldDriverError();
}

//---------------------------------------------------------------------------


static BOOL _InitialiseMesa_ERROR(
    DGL_ctx *ctx)
{
    return _gldDriverError();
}

//---------------------------------------------------------------------------

static BOOL _SwapBuffers_ERROR(
    DGL_ctx *ctx,
    HDC hDC,
    HWND hWnd)
{
    return _gldDriverError();
}

//---------------------------------------------------------------------------

static PROC _GetProcAddress_ERROR(
    LPCSTR a)
{
    _gldDriverError();
    return NULL;
}

//---------------------------------------------------------------------------

static BOOL _GetDisplayMode_ERROR(
    DGL_ctx *ctx,
    GLD_displayMode *glddm)
{
    return _gldDriverError();
}

//---------------------------------------------------------------------------
// Functions useful to all drivers
//---------------------------------------------------------------------------

const GLubyte* _gldGetStringGeneric(
    GLcontext *ctx,
    GLenum name)
{
    if (!ctx)
        return NULL;

    switch (name) {
    case GL_RENDERER:
        sprintf(_gldRendererString, "GLDirect 4.0 %s%s%s%s (%s %s)",
            _mesa_x86_cpu_features  ? "/x86"        : "",
            cpu_has_mmx             ? "/MMX"        : "",
            cpu_has_3dnow           ? "/3DNow!"     : "",
            cpu_has_xmm             ? "/SSE"        : "",
            __DATE__, __TIME__);
        return (const GLubyte *) _gldRendererString;
    case GL_VENDOR:
        return (const GLubyte *) szVendor;
    default:
        return NULL;
    }
}

//---------------------------------------------------------------------------
// Global driver function pointers, initially set to functions that
// will report an error when called.
//---------------------------------------------------------------------------

GLD_driver _gldDriver = {
    _GetDXErrorString_ERROR,
    _CreateDrawable_ERROR,
    _ResizeDrawable_ERROR,
    _DestroyDrawable_ERROR,
    _CreatePrivateGlobals_ERROR,
    _DestroyPrivateGlobals_ERROR,
    _BuildPixelformatList_ERROR,
    _InitialiseMesa_ERROR,
    _SwapBuffers_ERROR,
    _GetProcAddress_ERROR,
    _GetDisplayMode_ERROR
};

//---------------------------------------------------------------------------
// Init function. Should be called as soon as regkeys/ini-settings are read.
//---------------------------------------------------------------------------

BOOL gldInitDriverPointers(
    DWORD dwDriver)
{
    _gldDriver.GetDXErrorString = gldGetDXErrorString_DX;

    if (dwDriver == GLDS_DRIVER_MESA_SW) {
        // Mesa Software driver
        _gldDriver.CreateDrawable           = gldCreateDrawable_MesaSW;
        _gldDriver.ResizeDrawable           = gldResizeDrawable_MesaSW;
        _gldDriver.DestroyDrawable          = gldDestroyDrawable_MesaSW;
        _gldDriver.CreatePrivateGlobals     = gldCreatePrivateGlobals_MesaSW;
        _gldDriver.DestroyPrivateGlobals    = gldDestroyPrivateGlobals_MesaSW;
        _gldDriver.BuildPixelformatList     = gldBuildPixelformatList_MesaSW;
        _gldDriver.InitialiseMesa           = gldInitialiseMesa_MesaSW;
        _gldDriver.SwapBuffers              = gldSwapBuffers_MesaSW;
        _gldDriver.wglGetProcAddress        = gldGetProcAddress_MesaSW;
        _gldDriver.GetDisplayMode           = gldGetDisplayMode_MesaSW;
        return TRUE;
    }
    
    if ((dwDriver == GLDS_DRIVER_REF) || (dwDriver == GLDS_DRIVER_HAL)) {
        // Direct3D driver, either HW or SW
        _gldDriver.CreateDrawable           = gldCreateDrawable_DX;
        _gldDriver.ResizeDrawable           = gldResizeDrawable_DX;
        _gldDriver.DestroyDrawable          = gldDestroyDrawable_DX;
        _gldDriver.CreatePrivateGlobals     = gldCreatePrivateGlobals_DX;
        _gldDriver.DestroyPrivateGlobals    = gldDestroyPrivateGlobals_DX;
        _gldDriver.BuildPixelformatList     = gldBuildPixelformatList_DX;
        _gldDriver.InitialiseMesa           = gldInitialiseMesa_DX;
        _gldDriver.SwapBuffers              = gldSwapBuffers_DX;
        _gldDriver.wglGetProcAddress        = gldGetProcAddress_DX;
        _gldDriver.GetDisplayMode           = gldGetDisplayMode_DX;
        return TRUE;
    };

    return FALSE;
}

//---------------------------------------------------------------------------