add SciTech's GLDirect driver for Windows.

This code is donated to Mesa which allows the usage of
a Direct3D layer (DX7, DX8, DX9 or complete software fallback).

No build system exists for this code yet, that will come.....

1 files changed, 281 insertions, 0 deletions

diff --git a/src/mesa/drivers/windows/gldirect/dglcontext.h b/src/mesa/drivers/windows/gldirect/dglcontext.h
new file mode 100644
index 00000000000..5c433b857ef
--- /dev/null
+++ b/src/mesa/drivers/windows/gldirect/dglcontext.h
@@ -0,0 +1,281 @@
+/****************************************************************************
+*
+*                        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 (Win32)
+*
+* Description:  OpenGL context handling.
+*
+****************************************************************************/
+
+#ifndef __DGLCONTEXT_H
+#define __DGLCONTEXT_H
+
+// Disable compiler complaints about DLL linkage
+#pragma warning (disable:4273)
+
+// Macros to control compilation
+#ifndef STRICT
+#define STRICT
+#endif // STRICT
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <GL\gl.h>
+
+#ifdef _USE_GLD3_WGL
+	#include "dglmacros.h"
+	#include "dglglobals.h"
+	#include "pixpack.h"
+	#include "ddlog.h"
+	#include "dglpf.h"
+	#include "context.h"	// Mesa context
+#else
+	#include <ddraw.h>
+	#include <d3d.h>
+
+	#include "dglmacros.h"
+	#include "dglglobals.h"
+	#include "pixpack.h"
+	#include "ddlog.h"
+	#include "dglpf.h"
+	#include "d3dvertex.h"
+
+	#include "DirectGL.h"
+
+	#include "context.h"	// Mesa context
+	#include "vb.h"			// Mesa vertex buffer
+#endif // _USE_GLD3_WGL
+
+/*---------------------- Macros and type definitions ----------------------*/
+
+// TODO: Use a list instead of this constant!
+#define DGL_MAX_CONTEXTS 32
+
+// Structure for describing an OpenGL context
+#ifdef _USE_GLD3_WGL
+typedef struct {
+	BOOL				bHasBeenCurrent;
+	DGL_pixelFormat		*lpPF;
+
+	// Pointer to private driver data (this also contains the drawable).
+	void				*glPriv;
+
+	// Mesa vars:
+	GLcontext			*glCtx;			// The core Mesa context
+	GLvisual			*glVis;			// Describes the color buffer
+	GLframebuffer		*glBuffer;		// Ancillary buffers
+
+	GLuint				ClearIndex;
+	GLuint				CurrentIndex;
+	GLubyte				ClearColor[4];
+	GLubyte				CurrentColor[4];
+
+	BOOL				EmulateSingle;	// Emulate single-buffering
+	BOOL				bDoubleBuffer;
+	BOOL				bDepthBuffer;
+
+	// Shared driver vars:
+	BOOL				bAllocated;
+    BOOL				bFullscreen;	// Is this a fullscreen context?
+    BOOL				bSceneStarted;	// Has a lpDev->BeginScene been issued?
+    BOOL				bCanRender;		// Flag: states whether rendering is OK
+	BOOL				bFrameStarted;	// Has frame update started at all?
+	BOOL				bStencil;		// TRUE if this context has stencil
+	BOOL				bGDIEraseBkgnd; // GDI Erase Background command
+
+	// Window information
+	HWND				hWnd;			// Window handle
+	HDC					hDC;			// Windows' Device Context of the window
+	DWORD				dwWidth;		// Window width
+	DWORD				dwHeight;		// Window height
+	DWORD				dwBPP;			// Window bits-per-pixel;
+	RECT				rcScreenRect;	// Screen rectangle
+	DWORD				dwModeWidth;	// Display mode width
+	DWORD				dwModeHeight;	// Display mode height
+	float				dvClipX;
+	float				dvClipY;
+	LONG				lpfnWndProc;	// window message handler function
+
+} DGL_ctx;
+
+#define GLD_context			DGL_ctx
+#define GLD_GET_CONTEXT(c)	(GLD_context*)(c)->DriverCtx
+
+#else // _USE_GLD3_WGL
+
+typedef struct {
+	BOOL				bHasBeenCurrent;
+	DGL_pixelFormat		*lpPF;
+	//
+	// Mesa context vars:
+	//
+	GLcontext			*glCtx;			// The core Mesa context
+	GLvisual			*glVis;			// Describes the color buffer
+	GLframebuffer		*glBuffer;		// Ancillary buffers
+
+	GLuint				ClearIndex;
+	GLuint				CurrentIndex;
+	GLubyte				ClearColor[4];
+	GLubyte				CurrentColor[4];
+
+	BOOL				EmulateSingle;	// Emulate single-buffering
+	BOOL				bDoubleBuffer;
+	BOOL				bDepthBuffer;
+	int					iZBufferPF;		// Index of Zbuffer pixel format
+
+	// Vertex buffer: one-to-one correlation with Mesa's vertex buffer.
+	// This will be filled by our setup function (see d3dvsetup.c)
+	DGL_TLvertex		gWin[VB_SIZE];	// Transformed and lit vertices
+//	DGL_Lvertex			gObj[VB_SIZE];	// Lit vertices in object coordinates.
+
+	// Indices for DrawIndexedPrimitive.
+	// Clipped quads are drawn seperately, so use VB_SIZE.
+	// 6 indices are needed to make 2 triangles for each possible quad
+//	WORD				wIndices[(VB_SIZE / 4) * 6];
+	WORD				wIndices[32768];
+
+	//
+	// Device driver vars:
+	//
+	BOOL				bAllocated;
+    BOOL				bFullscreen;	// Is this a fullscreen context?
+    BOOL				bSceneStarted;	// Has a lpDev->BeginScene been issued?
+    BOOL				bCanRender;		// Flag: states whether rendering is OK
+	BOOL				bFrameStarted;	// Has frame update started at all?
+
+    // DirectX COM interfaces, postfixed with the interface number
+	IDirectDraw				*lpDD1;
+	IDirectDraw4			*lpDD4;
+	IDirect3D3				*lpD3D3;
+	IDirect3DDevice3		*lpDev3;
+	IDirect3DViewport3		*lpViewport3;
+	IDirectDrawSurface4		*lpFront4;
+	IDirectDrawSurface4		*lpBack4;
+	IDirectDrawSurface4		*lpDepth4;
+
+	// Vertex buffers
+	BOOL					bD3DPipeline; // True if using D3D geometry pipeline
+	IDirect3DVertexBuffer	*m_vbuf;	// Unprocessed vertices
+	IDirect3DVertexBuffer	*m_pvbuf;	// Processed vertices ready to be rendered
+
+	D3DTEXTUREOP		ColorOp[MAX_TEXTURE_UNITS]; // Used for re-enabling texturing
+	D3DTEXTUREOP		AlphaOp[MAX_TEXTURE_UNITS]; // Used for re-enabling texturing
+	struct gl_texture_object *tObj[MAX_TEXTURE_UNITS];
+
+	DDCAPS				ddCaps;			// DirectDraw caps
+	D3DDEVICEDESC		D3DDevDesc;		// Direct3D Device description
+
+	DDPIXELFORMAT		ddpfRender;		// Pixel format of the render buffer
+	DDPIXELFORMAT		ddpfDepth;		// Pixel format of the depth buffer
+
+	BOOL				bStencil;		// TRUE is this context has stencil
+
+	PX_packFunc			fnPackFunc;		// Pixel packing function for SW
+	PX_unpackFunc		fnUnpackFunc;	// Pixel unpacking function for SW
+	PX_packSpanFunc		fnPackSpanFunc;	// Pixel span packer
+
+	D3DVIEWPORT2		d3dViewport;	// D3D Viewport object
+
+	D3DCULL				cullmode;		// Direct3D cull mode
+	D3DCOLOR			curcolor;		// Current color
+	DWORD				dwColorPF;		// Current color, in format of target surface
+	D3DCOLOR			d3dClearColor;	// Clear color
+	D3DCOLOR			ConstantColor;	// For flat shading
+	DWORD				dwClearColorPF;	// Clear color, in format of target surface
+	BOOL				bGDIEraseBkgnd; // GDI Erase Background command
+
+	// Primitive caches
+//	DGL_vertex			LineCache[DGL_MAX_LINE_VERTS];
+//	DGL_vertex			TriCache[DGL_MAX_TRI_VERTS];
+//	DWORD				dwNextLineVert;
+//	DWORD				dwNextTriVert;
+
+	// Window information
+	HWND				hWnd;			// Window handle
+	HDC					hDC;			// Windows' Device Context of the window
+	DWORD				dwWidth;		// Window width
+	DWORD				dwHeight;		// Window height
+	DWORD				dwBPP;			// Window bits-per-pixel;
+	RECT				rcScreenRect;	// Screen rectangle
+	DWORD				dwModeWidth;	// Display mode width
+	DWORD				dwModeHeight;	// Display mode height
+	float				dvClipX;
+	float				dvClipY;
+	LONG				lpfnWndProc;	// window message handler function
+
+	// Shared texture palette
+	IDirectDrawPalette	*lpGlobalPalette;
+
+	// Usage counters.
+	// One of these counters will be incremented when we choose
+	// between hardware and software rendering functions.
+//	DWORD				dwHWUsageCount;	// Hardware usage count
+//	DWORD				dwSWUsageCount;	// Software usage count
+
+	// Texture state flags.
+//	BOOL				m_texturing;		// TRUE is texturing
+//	BOOL				m_mtex;				// TRUE if multitexture
+//	BOOL				m_texHandleValid;	// TRUE if tex state valid
+
+	// Renderstate caches to ensure no redundant state changes
+	DWORD				dwRS[256];		// Renderstates
+	DWORD				dwTSS[2][24];	// Texture-stage states
+	LPDIRECT3DTEXTURE2	lpTex[2];		// Texture (1 per stage)
+
+	DWORD				dwMaxTextureSize;	// Max texture size:
+											// clamped to 1024.
+
+} DGL_ctx;
+#endif // _USE_GLD3_WGL
+
+/*------------------------- Function Prototypes ---------------------------*/
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+HHOOK	hKeyHook;
+LRESULT CALLBACK dglKeyProc(int code,WPARAM wParam,LPARAM lParam);
+
+void		dglInitContextState();
+void		dglDeleteContextState();
+BOOL 		dglIsValidContext(HGLRC a);
+DGL_ctx*	dglGetContextAddress(const HGLRC a);
+HDC 		dglGetCurrentDC(void);
+HGLRC 		dglGetCurrentContext(void);
+HGLRC		dglCreateContext(HDC a, const DGL_pixelFormat *lpPF);
+BOOL		dglMakeCurrent(HDC a, HGLRC b);
+BOOL		dglDeleteContext(HGLRC a);
+BOOL		dglSwapBuffers(HDC hDC);
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif