tdfx_context.h

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

struct tdfxSharedState {
   GLboolean umaTexMemory;
   GLuint totalTexMem[TDFX_NUM_TMU]; /* constant */
   GLuint freeTexMem[TDFX_NUM_TMU]; /* changes as we go */
   tdfxMemRange *tmPool;
   tdfxMemRange *tmFree[TDFX_NUM_TMU];
};



/* ================================================================
 * The vertex structures.
 */
/* The size of this union is not of relevence:
 */
typedef struct tdfx_vertex_t {
   GLfloat x, y, z;			/* Coordinates in screen space */
   GLfloat rhw;				/* Reciprocal homogeneous w */
   GLubyte color[4];		/* Diffuse color */
   GLfloat fog;
   GLfloat tu0, tv0;		/* Texture 0 coordinates */
   GLfloat tu1, tv1;		/* Texture 1 coordinates */
   GLfloat tq0, tq1;		/* Texture 0/1 q coords */
   unsigned char pspec[4];	/* B, G, R, A [0..255] */
   float psize;		/* point size */
   long pad[16 - 14];	/* ensure 64b structure */
} tdfxVertex, *tdfxVertexPtr;


/* ================================================================
 *
 * We want to keep a mirror of the Glide function call parameters so we
 * can avoid updating our state too often.
 *
 * Each of these broad groups will typically have a new state flag
 * associated with it, and will be updated together.  The individual
 * Glide function calls each have a dirty flag and will only be called
 * when absolutely necessary.
 */

/* for grTexSource() */
struct tdfx_texsource {
   FxU32 StartAddress;
   FxU32 EvenOdd;
   GrTexInfo *Info;
};

/* Texture object params */
struct tdfx_texparams {
   GrTextureClampMode_t sClamp;
   GrTextureClampMode_t tClamp;
   GrTextureFilterMode_t minFilt;
   GrTextureFilterMode_t magFilt;
   GrMipMapMode_t mmMode;
   FxBool LODblend;
   GLfloat LodBias;
};

/* for grTexDownloadTable() texture palettes */
struct tdfx_texpalette {
   GrTexTable_t Type;
   void *Data;
};

/* for Voodoo3/Banshee's grColorCombine() and grAlphaCombine() */
struct tdfx_combine {
   GrCombineFunction_t Function;	/* Combine function */
   GrCombineFactor_t Factor;		/* Combine scale factor */
   GrCombineLocal_t Local;		/* Local combine source */
   GrCombineOther_t Other;		/* Other combine source */
   FxBool Invert;			/* Combine result inversion flag */
};

/* for Voodoo3's grTexCombine() */
struct tdfx_texcombine {
   GrCombineFunction_t FunctionRGB;
   GrCombineFactor_t FactorRGB;
   GrCombineFunction_t FunctionAlpha;
   GrCombineFactor_t FactorAlpha;
   FxBool InvertRGB;
   FxBool InvertAlpha;
};


/* for Voodoo5's grColorCombineExt() */
struct tdfx_combine_color_ext {
   GrCCUColor_t SourceA;
   GrCombineMode_t ModeA;
   GrCCUColor_t SourceB;
   GrCombineMode_t ModeB;
   GrCCUColor_t SourceC;
   FxBool InvertC;
   GrCCUColor_t SourceD;
   FxBool InvertD;
   FxU32 Shift;
   FxBool Invert;
};

/* for Voodoo5's grAlphaCombineExt() */
struct tdfx_combine_alpha_ext {
   GrACUColor_t SourceA;
   GrCombineMode_t ModeA;
   GrACUColor_t SourceB;
   GrCombineMode_t ModeB;
   GrACUColor_t SourceC;
   FxBool InvertC;
   GrACUColor_t SourceD;
   FxBool InvertD;
   FxU32 Shift;
   FxBool Invert;
};

/* for Voodoo5's grTexColorCombineExt() */
struct tdfx_color_texenv {
   GrTCCUColor_t SourceA;
   GrCombineMode_t ModeA;
   GrTCCUColor_t SourceB;
   GrCombineMode_t ModeB;
   GrTCCUColor_t SourceC;
   FxBool InvertC;
   GrTCCUColor_t SourceD;
   FxBool InvertD;
   FxU32 Shift;
   FxBool Invert;
};

/* for Voodoo5's grTexAlphaCombineExt() */
struct tdfx_alpha_texenv {
   GrTACUColor_t SourceA;
   GrCombineMode_t ModeA;
   GrTACUColor_t SourceB;
   GrCombineMode_t ModeB;
   GrTACUColor_t SourceC;
   FxBool InvertC;
   GrTCCUColor_t SourceD;
   FxBool InvertD;
   FxU32 Shift;
   FxBool Invert;
};

/* Voodoo5's texture combine environment */
struct tdfx_texcombine_ext {
   struct tdfx_alpha_texenv Alpha;
   struct tdfx_color_texenv Color;
   GrColor_t EnvColor;
};

/* Used to track changes between Glide's state and Mesa's */
struct tdfx_texstate {
   GLuint Enabled[2];              /* values ala ctx->Texture.Unit[i]._ReallyEnabled */
   GLenum EnvMode[TDFX_NUM_TMU];   /* index is Glide index, not OpenGL */
   GLenum TexFormat[TDFX_NUM_TMU]; /* index is Glide index, not OpenGL */
};

struct tdfx_color {
   GrColor_t ClearColor;		/* Buffer clear color value */
   GrAlpha_t ClearAlpha;		/* Buffer clear alpha value */
   FxBool ColorMask[4];			/* Per-channel write enable flags */

   GrColor_t MonoColor;			/* Constant color value */

   /* Alpha testing */
   GrCmpFnc_t AlphaFunc;		/* Alpha test function */
   GrAlpha_t AlphaRef;			/* Alpha ref value in range [0,255] */

   /* Blending */
   GrAlphaBlendFnc_t BlendSrcRGB;	/* Blend source RGB factor */
   GrAlphaBlendFnc_t BlendDstRGB;	/* Blend destination RGB factor */
   GrAlphaBlendOp_t BlendEqRGB;		/* Blend source RGB op */
   GrAlphaBlendFnc_t BlendSrcA;		/* Blend source alpha factor */
   GrAlphaBlendFnc_t BlendDstA;		/* Blend destination alpha factor */
   GrAlphaBlendOp_t BlendEqA;		/* Blend source alpha op */

   GrDitherMode_t Dither;		/* Dither enable */
};

struct tdfx_depth {
   GrDepthBufferMode_t Mode;		/* Fixed-point Z or floating-point W */
   FxI32 Bias;				/* Polygon offset factor */
   GrCmpFnc_t Func;			/* Depth test function */
   FxU32 Clear;				/* Buffer clear value */
   FxBool Mask;				/* Write enable flag */
};

struct tdfx_stipple {
   GrStippleMode_t Mode;		/* Stipple enable/disable */
   FxU32 Pattern;			/* 8x4 Stipple Pattern */
};

struct tdfx_fog {
   GrFogMode_t Mode;			/* Glide fog mode */
   GrColor_t Color;			/* Fog color value */
   GLenum TableMode;			/* GL fog mode currently in table */
   GrFog_t *Table;			/* Fog value table */
   FxFloat Density;			/* Density >= 0 */
   FxFloat Near;			/* Start distance in eye coords */
   FxFloat Far;				/* End distance in eye coords */
};

struct tdfx_stencil {
   GrCmpFnc_t Function;			/* Stencil function */
   GrStencil_t RefValue;		/* Stencil reference value */
   GrStencil_t ValueMask;		/* Value mask */
   GrStencil_t WriteMask;		/* Write mask */
   GrStencil_t FailFunc;		/* Stencil fail function */
   GrStencil_t ZFailFunc;		/* Stencil pass, depth fail function */
   GrStencil_t ZPassFunc;		/* Stencil pass, depth pass function */
   GrStencil_t Clear;			/* Buffer clear value */
};

struct tdfx_scissor {
   FxU32 minX, minY;			/* Lower left corner */
   FxU32 maxX, maxY;			/* Upper right corner */
};

struct tdfx_viewport {
   GrCoordinateSpaceMode_t Mode;	/* Coordinate space */
   FxI32 X, Y;				/* Position */
   FxI32 Width, Height;			/* Size */
   FxFloat Near, Far;			/* Depth buffer range */
};

struct tdfx_glide {
   void *State;				/* Mirror of internal Glide state */
   GrContext_t Context;			/* Glide context identifier */
   FxI32 Board;				/* Current graphics subsystem */
   GrColorFormat_t ColorFormat;		/* Framebuffer format */
   GrOriginLocation_t Origin;		/* Location of screen space origin */

   FxBool Initialized;			/* Glide initialization done? */

   FxI32 SwapInterval;			/* SwapBuffers interval */
   FxI32 MaxPendingSwaps;		/* Maximum outstanding SwapBuffers */
   FxI32 TextureAlign;

   /* Extensions */
   FxBool HaveCombineExt;		/* COMBINE */
   FxBool HaveCommandTransportExt;	/* COMMAND_TRANSPORT */
   FxBool HaveFogCoordExt;		/* FOGCOORD */
   FxBool HavePixelExt;			/* PIXEXT */
   FxBool HaveTextureBufferExt;		/* TEXTUREBUFFER */
   FxBool HaveTexFmtExt;		/* TEXFMT */
   FxBool HaveTexUMAExt;		/* TEXUMA */
   FxBool HaveMirrorExt;		/* MIRROR */
   FxBool HaveTexus2;			/* Texus 2 - FXT1 */

   /* Glide library function pointers */
   void (*grDrawPoint)( const void *pt );
   void (*grDrawLine)( const void *v1, const void *v2 );
   void (*grDrawTriangle)( const void *a, const void *b, const void *c );
   void (*grVertexLayout)(FxU32 param, FxI32 offset, FxU32 mode);
   void (*grDrawVertexArray)(FxU32 mode, FxU32 Count, void *pointers);
   void (*grDrawVertexArrayContiguous)(FxU32 mode, FxU32 Count,
                                       void *pointers, FxU32 stride);
   void (*grBufferClear)( GrColor_t color, GrAlpha_t alpha, FxU32 depth );
   void (*grBufferSwap)( FxU32 swap_interval );
   void (*grRenderBuffer)( GrBuffer_t buffer );
   void (*grErrorSetCallback)( GrErrorCallbackFnc_t fnc );
   void (*grFinish)(void);
   void (*grFlush)(void);
   GrContext_t (*grSstWinOpen)(FxU32                hWnd,
                               GrScreenResolution_t screen_resolution,
                               GrScreenRefresh_t    refresh_rate,
                               GrColorFormat_t      color_format,
                               GrOriginLocation_t   origin_location,
                               int                  nColBuffers,
                               int                  nAuxBuffers);
   void (*grSstWinClose)( GrContext_t context );
/* Not used */
#if 0
   void (*grSetNumPendingBuffers)(FxI32 NumPendingBuffers);
#endif
   void (*grSelectContext)( GrContext_t context );
   void (*grSstOrigin)(GrOriginLocation_t  origin);
   void (*grSstSelect)( int which_sst );
   void (*grAlphaBlendFunction)(GrAlphaBlendFnc_t rgb_sf,
                                GrAlphaBlendFnc_t rgb_df,
                                GrAlphaBlendFnc_t alpha_sf,
                                GrAlphaBlendFnc_t alpha_df);
   void (*grAlphaCombine)(GrCombineFunction_t function,
                          GrCombineFactor_t factor,
                          GrCombineLocal_t local, GrCombineOther_t other,
                          FxBool invert);
   void (*grAlphaControlsITRGBLighting)( FxBool enable );
   void (*grAlphaTestFunction)( GrCmpFnc_t function );
   void (*grAlphaTestReferenceValue)( GrAlpha_t value );
   void (*grChromakeyMode)( GrChromakeyMode_t mode );
   void (*grChromakeyValue)( GrColor_t value );
   void (*grClipWindow)( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy );
   void (*grColorCombine)( GrCombineFunction_t function,
                           GrCombineFactor_t factor,
                           GrCombineLocal_t local,
                           GrCombineOther_t other,
                           FxBool invert );
   void (*grColorMask)( FxBool rgb, FxBool a );
   void (*grCullMode)( GrCullMode_t mode );
   void (*grConstantColorValue)( GrColor_t value );
   void (*grDepthBiasLevel)( FxI32 level );
   void (*grDepthBufferFunction)( GrCmpFnc_t function );
   void (*grDepthBufferMode)( GrDepthBufferMode_t mode );
   void (*grDepthMask)( FxBool mask );
   void (*grDisableAllEffects)( void );
   void (*grDitherMode)( GrDitherMode_t mode );
   void (*grFogColorValue)( GrColor_t fogcolor );
   void (*grFogMode)( GrFogMode_t mode );
   void (*grFogTable)( const GrFog_t ft[] );
   void (*grLoadGammaTable)( FxU32 nentries, FxU32 *red, FxU32 *green, FxU32 *blue);
   void (*grSplash)(float x, float y, float width, float height, FxU32 frame);
   FxU32 (*grGet)( FxU32 pname, FxU32 plength, FxI32 *params );
   const char * (*grGetString)( FxU32 pname );
   FxI32 (*grQueryResolutions)( const GrResolution *resTemplate,
                                GrResolution *output );
   FxBool (*grReset)( FxU32 what );
   GrProc (*grGetProcAddress)( char *procName );
   void (*grEnable)( GrEnableMode_t mode );
   void (*grDisable)( GrEnableMode_t mode );
   void (*grCoordinateSpace)( GrCoordinateSpaceMode_t mode );
   void (*grDepthRange)( FxFloat n, FxFloat f );
   void (*grStippleMode)( GrStippleMode_t mode );
   void (*grStipplePattern)( GrStipplePattern_t mode );
   void (*grViewport)( FxI32 x, FxI32 y, FxI32 width, FxI32 height );
   FxU32 (*grTexCalcMemRequired)(GrLOD_t lodmin, GrLOD_t lodmax,
                                GrAspectRatio_t aspect, GrTextureFormat_t fmt);
   FxU32 (*grTexTextureMemRequired)( FxU32 evenOdd, GrTexInfo *info );
   FxU32 (*grTexMinAddress)( GrChipID_t tmu );
   FxU32 (*grTexMaxAddress)( GrChipID_t tmu );
   void (*grTexNCCTable)( GrNCCTable_t table );
   void (*grTexSource)( GrChipID_t tmu, FxU32 startAddress,
                        FxU32 evenOdd, GrTexInfo *info );
   void (*grTexClampMode)( GrChipID_t tmu,
                           GrTextureClampMode_t s_clampmode,
                           GrTextureClampMode_t t_clampmode );
   void (*grTexCombine)( GrChipID_t tmu,
                         GrCombineFunction_t rgb_function,
                         GrCombineFactor_t rgb_factor, 
                         GrCombineFunction_t alpha_function,
                         GrCombineFactor_t alpha_factor,
                         FxBool rgb_invert,
                         FxBool alpha_invert);
   void (*grTexDetailControl)( GrChipID_t tmu, int lod_bias,