tdfx_state.c

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

      }
      fxMesa->dirty |= TDFX_UPLOAD_DITHER;
      break;

   case GL_FOG:
      FLUSH_BATCH( fxMesa );
      fxMesa->new_state |= TDFX_NEW_FOG;
      break;

   case GL_COLOR_LOGIC_OP:
      FALLBACK( fxMesa, TDFX_FALLBACK_LOGICOP,
		(ctx->Color.ColorLogicOpEnabled &&
		 ctx->Color.LogicOp != GL_COPY));
      break;

   case GL_LIGHTING:
      FALLBACK( fxMesa, TDFX_FALLBACK_SPECULAR,
		(ctx->Light.Enabled &&
		 ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR ));
      break;

   case GL_LINE_SMOOTH:
      FLUSH_BATCH( fxMesa );
      fxMesa->new_state |= TDFX_NEW_LINE;
      break;

   case GL_LINE_STIPPLE:
      FALLBACK(fxMesa, TDFX_FALLBACK_LINE_STIPPLE, state);
      break;

   case GL_POLYGON_STIPPLE:
      FLUSH_BATCH(fxMesa);
      fxMesa->new_state |= TDFX_NEW_STIPPLE;
      break;

   case GL_SCISSOR_TEST:
      FLUSH_BATCH( fxMesa );
      fxMesa->new_state |= TDFX_NEW_CLIP;
      break;

   case GL_STENCIL_TEST:
      FLUSH_BATCH( fxMesa );
      FALLBACK( fxMesa, TDFX_FALLBACK_STENCIL, state && !fxMesa->haveHwStencil);
      fxMesa->new_state |= TDFX_NEW_STENCIL;
      break;

   case GL_TEXTURE_3D:
      FLUSH_BATCH( fxMesa );
      FALLBACK( fxMesa, TDFX_FALLBACK_TEXTURE_MAP, state); /* wrong */
      fxMesa->new_state |= TDFX_NEW_TEXTURE;
      break;

   case GL_TEXTURE_1D:
   case GL_TEXTURE_2D:
      FLUSH_BATCH( fxMesa );
      fxMesa->new_state |= TDFX_NEW_TEXTURE;
      break;

   default:
      return;
   }
}



/* Set the buffer used for drawing */
/* XXX support for separate read/draw buffers hasn't been tested */
static void tdfxDDDrawBuffer( GLcontext *ctx, GLenum mode )
{
   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);

   if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
      fprintf( stderr, "%s()\n", __FUNCTION__ );
   }

   FLUSH_BATCH( fxMesa );

   if (ctx->DrawBuffer->_NumColorDrawBuffers > 1) {
      FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_TRUE );
      return;
   }

   switch ( ctx->DrawBuffer->_ColorDrawBufferIndexes[0] ) {
   case BUFFER_FRONT_LEFT:
      fxMesa->DrawBuffer = fxMesa->ReadBuffer = GR_BUFFER_FRONTBUFFER;
      fxMesa->new_state |= TDFX_NEW_RENDER;
      FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_FALSE );
      break;
   case BUFFER_BACK_LEFT:
      fxMesa->DrawBuffer = fxMesa->ReadBuffer = GR_BUFFER_BACKBUFFER;
      fxMesa->new_state |= TDFX_NEW_RENDER;
      FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_FALSE );
      break;
   case -1:
      FX_grColorMaskv( ctx, false4 );
      FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_FALSE );
      break;
   default:
      FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_TRUE );
      break;
   }
}


static void tdfxDDReadBuffer( GLcontext *ctx, GLenum mode )
{
   /* XXX ??? */
}


/* =============================================================
 * Polygon stipple
 */

static void tdfxDDPolygonStipple( GLcontext *ctx, const GLubyte *mask )
{
   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
   const GLubyte *m = mask;
   GLubyte q[4];
   int i,j,k;
   GLboolean allBitsSet;

/*     int active = (ctx->Polygon.StippleFlag &&  */
/*  		 fxMesa->reduced_prim == GL_TRIANGLES); */

   FLUSH_BATCH(fxMesa);
   fxMesa->Stipple.Pattern = 0xffffffff;
   fxMesa->dirty |= TDFX_UPLOAD_STIPPLE;
   fxMesa->new_state |= TDFX_NEW_STIPPLE;

   /* Check if the stipple pattern is fully opaque.  If so, use software
    * rendering.  This basically a trick to make sure the OpenGL conformance
    * test passes.
    */
   allBitsSet = GL_TRUE;
   for (i = 0; i < 32; i++) {
      if (((GLuint *) mask)[i] != 0xffffffff) {
         allBitsSet = GL_FALSE;
         break;
      }
   }
   if (allBitsSet) {
      fxMesa->haveHwStipple = GL_FALSE;
      return;
   }

   q[0] = mask[0];
   q[1] = mask[4];
   q[2] = mask[8];
   q[3] = mask[12];

   for (k = 0 ; k < 8 ; k++)
      for (j = 0 ; j < 4; j++)
	 for (i = 0 ; i < 4 ; i++,m++) {
	    if (*m != q[j]) {
	       fxMesa->haveHwStipple = GL_FALSE;
	       return;
	    }
         }

   fxMesa->haveHwStipple = GL_TRUE;
   fxMesa->Stipple.Pattern = ( (q[0] << 0) |
                               (q[1] << 8) |
                               (q[2] << 16) |
                               (q[3] << 24) );
}



static void tdfxDDRenderMode( GLcontext *ctx, GLenum mode )
{
   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
   FALLBACK( fxMesa, TDFX_FALLBACK_RENDER_MODE, (mode != GL_RENDER) );
}



static void tdfxDDPrintState( const char *msg, GLuint flags )
{
   fprintf( stderr,
	    "%s: (0x%x) %s%s%s%s%s%s%s%s%s%s%s%s%s\n",
	    msg,
	    flags,
	    (flags & TDFX_NEW_COLOR) ? "color, " : "",
	    (flags & TDFX_NEW_ALPHA) ? "alpha, " : "",
	    (flags & TDFX_NEW_DEPTH) ? "depth, " : "",
	    (flags & TDFX_NEW_RENDER) ? "render, " : "",
	    (flags & TDFX_NEW_FOG) ? "fog, " : "",
	    (flags & TDFX_NEW_STENCIL) ? "stencil, " : "",
	    (flags & TDFX_NEW_STIPPLE) ? "stipple, " : "",
	    (flags & TDFX_NEW_CLIP) ? "clip, " : "",
	    (flags & TDFX_NEW_VIEWPORT) ? "viewport, " : "",
	    (flags & TDFX_NEW_CULL) ? "cull, " : "",
	    (flags & TDFX_NEW_GLIDE) ? "glide, " : "",
	    (flags & TDFX_NEW_TEXTURE) ? "texture, " : "",
	    (flags & TDFX_NEW_CONTEXT) ? "context, " : "");
}



void tdfxDDUpdateHwState( GLcontext *ctx )
{
   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
   int new_state = fxMesa->new_state;

   if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
      fprintf( stderr, "%s()\n", __FUNCTION__ );
   }

   if ( new_state )
   {
      FLUSH_BATCH( fxMesa );

      fxMesa->new_state = 0;

      if ( 0 )
	 tdfxDDPrintState( "tdfxUpdateHwState", new_state );

      /* Update the various parts of the context's state.
       */
      if ( new_state & TDFX_NEW_ALPHA ) {
	 tdfxUpdateAlphaMode( ctx );
      }

      if ( new_state & TDFX_NEW_DEPTH )
	 tdfxUpdateZMode( ctx );

      if ( new_state & TDFX_NEW_FOG )
	 tdfxUpdateFogAttrib( ctx );

      if ( new_state & TDFX_NEW_CLIP )
	 tdfxUpdateClipping( ctx );

      if ( new_state & TDFX_NEW_STIPPLE )
	 tdfxUpdateStipple( ctx );

      if ( new_state & TDFX_NEW_CULL )
	 tdfxUpdateCull( ctx );

      if ( new_state & TDFX_NEW_LINE )
         tdfxUpdateLine( ctx );

      if ( new_state & TDFX_NEW_VIEWPORT )
	 tdfxUpdateViewport( ctx );

      if ( new_state & TDFX_NEW_RENDER )
	 tdfxUpdateRenderAttrib( ctx );

      if ( new_state & TDFX_NEW_STENCIL )
         tdfxUpdateStencil( ctx );

      if ( new_state & TDFX_NEW_TEXTURE ) {
	 tdfxUpdateTextureState( ctx );
      }
      else if ( new_state & TDFX_NEW_TEXTURE_BIND ) {
	 tdfxUpdateTextureBinding( ctx );
      }
   }

   if ( 0 ) {
      FxI32 bias = (FxI32) (ctx->Polygon.OffsetUnits * TDFX_DEPTH_BIAS_SCALE);

      if ( fxMesa->Depth.Bias != bias ) {
	 fxMesa->Depth.Bias = bias;
	 fxMesa->dirty |= TDFX_UPLOAD_DEPTH_BIAS;
      }
   }

   if ( fxMesa->dirty ) {
      LOCK_HARDWARE( fxMesa );
      tdfxEmitHwStateLocked( fxMesa );
      UNLOCK_HARDWARE( fxMesa );
   }
}


static void tdfxDDInvalidateState( GLcontext *ctx, GLuint new_state )
{
   _swrast_InvalidateState( ctx, new_state );
   _swsetup_InvalidateState( ctx, new_state );
   _vbo_InvalidateState( ctx, new_state );
   _tnl_InvalidateState( ctx, new_state );
   TDFX_CONTEXT(ctx)->new_gl_state |= new_state;
}



/* Initialize the context's Glide state mirror.  These values will be
 * used as Glide function call parameters when the time comes.
 */
void tdfxInitState( tdfxContextPtr fxMesa )
{
   GLcontext *ctx = fxMesa->glCtx;
   GLint i;

   fxMesa->ColorCombine.Function	= GR_COMBINE_FUNCTION_LOCAL;
   fxMesa->ColorCombine.Factor		= GR_COMBINE_FACTOR_NONE;
   fxMesa->ColorCombine.Local		= GR_COMBINE_LOCAL_ITERATED;
   fxMesa->ColorCombine.Other		= GR_COMBINE_OTHER_NONE;
   fxMesa->ColorCombine.Invert		= FXFALSE;
   fxMesa->AlphaCombine.Function	= GR_COMBINE_FUNCTION_LOCAL;
   fxMesa->AlphaCombine.Factor		= GR_COMBINE_FACTOR_NONE;
   fxMesa->AlphaCombine.Local		= GR_COMBINE_LOCAL_ITERATED;
   fxMesa->AlphaCombine.Other		= GR_COMBINE_OTHER_NONE;
   fxMesa->AlphaCombine.Invert		= FXFALSE;

   fxMesa->ColorCombineExt.SourceA	= GR_CMBX_ITRGB;
   fxMesa->ColorCombineExt.ModeA	= GR_FUNC_MODE_X;
   fxMesa->ColorCombineExt.SourceB	= GR_CMBX_ZERO;
   fxMesa->ColorCombineExt.ModeB	= GR_FUNC_MODE_ZERO;
   fxMesa->ColorCombineExt.SourceC	= GR_CMBX_ZERO;
   fxMesa->ColorCombineExt.InvertC	= FXTRUE;
   fxMesa->ColorCombineExt.SourceD	= GR_CMBX_ZERO;
   fxMesa->ColorCombineExt.InvertD	= FXFALSE;
   fxMesa->ColorCombineExt.Shift	= 0;
   fxMesa->ColorCombineExt.Invert	= FXFALSE;
   fxMesa->AlphaCombineExt.SourceA	= GR_CMBX_ITALPHA;
   fxMesa->AlphaCombineExt.ModeA	= GR_FUNC_MODE_X;
   fxMesa->AlphaCombineExt.SourceB	= GR_CMBX_ZERO;
   fxMesa->AlphaCombineExt.ModeB	= GR_FUNC_MODE_ZERO;
   fxMesa->AlphaCombineExt.SourceC	= GR_CMBX_ZERO;
   fxMesa->AlphaCombineExt.InvertC	= FXTRUE;
   fxMesa->AlphaCombineExt.SourceD	= GR_CMBX_ZERO;
   fxMesa->AlphaCombineExt.InvertD	= FXFALSE;
   fxMesa->AlphaCombineExt.Shift	= 0;
   fxMesa->AlphaCombineExt.Invert	= FXFALSE;

   fxMesa->sScale0 = fxMesa->tScale0 = 1.0;
   fxMesa->sScale1 = fxMesa->tScale1 = 1.0;

   fxMesa->TexPalette.Type = 0;
   fxMesa->TexPalette.Data = NULL;

   for ( i = 0 ; i < TDFX_NUM_TMU ; i++ ) {
      fxMesa->TexSource[i].StartAddress	= 0;
      fxMesa->TexSource[i].EvenOdd	= GR_MIPMAPLEVELMASK_EVEN;
      fxMesa->TexSource[i].Info		= NULL;

      fxMesa->TexCombine[i].FunctionRGB		= 0;
      fxMesa->TexCombine[i].FactorRGB		= 0;
      fxMesa->TexCombine[i].FunctionAlpha	= 0;
      fxMesa->TexCombine[i].FactorAlpha		= 0;
      fxMesa->TexCombine[i].InvertRGB		= FXFALSE;
      fxMesa->TexCombine[i].InvertAlpha		= FXFALSE;

      fxMesa->TexCombineExt[i].Alpha.SourceA	= 0;
      /* XXX more state to init here */
      fxMesa->TexCombineExt[i].Color.SourceA	= 0;
      fxMesa->TexCombineExt[i].EnvColor        = 0x0;

      fxMesa->TexParams[i].sClamp 	= GR_TEXTURECLAMP_WRAP;
      fxMesa->TexParams[i].tClamp	= GR_TEXTURECLAMP_WRAP;
      fxMesa->TexParams[i].minFilt	= GR_TEXTUREFILTER_POINT_SAMPLED;
      fxMesa->TexParams[i].magFilt	= GR_TEXTUREFILTER_BILINEAR;
      fxMesa->TexParams[i].mmMode	= GR_MIPMAP_DISABLE;
      fxMesa->TexParams[i].LODblend	= FXFALSE;
      fxMesa->TexParams[i].LodBias	= 0.0;

      fxMesa->TexState.EnvMode[i]	= ~0;
      fxMesa->TexState.TexFormat[i]	= ~0;
      fxMesa->TexState.Enabled[i]	= 0;
   }

   if ( ctx->Visual.doubleBufferMode) {
      fxMesa->DrawBuffer		= GR_BUFFER_BACKBUFFER;
      fxMesa->ReadBuffer		= GR_BUFFER_BACKBUFFER;
   } else {
      fxMesa->DrawBuffer		= GR_BUFFER_FRONTBUFFER;
      fxMesa->ReadBuffer		= GR_BUFFER_FRONTBUFFER;
   }

   fxMesa->Color.ClearColor		= 0x00000000;
   fxMesa->Color.ClearAlpha		= 0x00;
   fxMesa->Color.ColorMask[RCOMP]	= FXTRUE;
   fxMesa->Color.ColorMask[BCOMP]	= FXTRUE;
   fxMesa->Color.ColorMask[GCOMP]	= FXTRUE;
   fxMesa->Color.ColorMask[ACOMP]	= FXTRUE;
   fxMesa->Color.MonoColor		= 0xffffffff;

   fxMesa->Color.AlphaFunc		= GR_CMP_ALWAYS;
   fxMesa->Color.AlphaRef		= 0x00;
   fxMesa->Color.BlendSrcRGB		= GR_BLEND_ONE;
   fxMesa->Color.BlendDstRGB		= GR_BLEND_ZERO;
   fxMesa->Color.BlendSrcA		= GR_BLEND_ONE;
   fxMesa->Color.BlendSrcA		= GR_BLEND_ZERO;

   fxMesa->Color.Dither			= GR_DITHER_2x2;

   if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
      fxMesa->Depth.Mode		= GR_DEPTHBUFFER_ZBUFFER;
   } else {
      fxMesa->Depth.Mode		= GR_DEPTHBUFFER_DISABLE;
   }
   fxMesa->Depth.Bias			= 0;
   fxMesa->Depth.Func			= GR_CMP_LESS;
   fxMesa->Depth.Clear			= 0; /* computed later */
   fxMesa->Depth.Mask			= FXTRUE;


   fxMesa->Fog.Mode			= GR_FOG_DISABLE;
   fxMesa->Fog.Color			= 0x00000000;
   fxMesa->Fog.Table			= NULL;
   fxMesa->Fog.Density			= 1.0;
   fxMesa->Fog.Near			= 1.0;
   fxMesa->Fog.Far			= 1.0;

   fxMesa->Stencil.Function		= GR_CMP_ALWAYS;
   fxMesa->Stencil.RefValue		= 0;
   fxMesa->Stencil.ValueMask		= 0xff;
   fxMesa->Stencil.WriteMask		= 0xff;
   fxMesa->Stencil.FailFunc		= 0;
   fxMesa->Stencil.ZFailFunc		= 0;
   fxMesa->Stencil.ZPassFunc		= 0;
   fxMesa->Stencil.Clear		= 0;

   fxMesa->Stipple.Mode                 = GR_STIPPLE_DISABLE;
   fxMesa->Stipple.Pattern              = 0xffffffff;

   fxMesa->Scissor.minX			= 0;
   fxMesa->Scissor.minY			= 0;
   fxMesa->Scissor.maxX			= 0;
   fxMesa->Scissor.maxY			= 0;

   fxMesa->Viewport.Mode		= GR_WINDOW_COORDS;
   fxMesa->Viewport.X			= 0;
   fxMesa->Viewport.Y			= 0;
   fxMesa->Viewport.Width		= 0;
   fxMesa->Viewport.Height		= 0;
   fxMesa->Viewport.Near		= 0.0;
   fxMesa->Viewport.Far			= 0.0;

   fxMesa->CullMode			= GR_CULL_DISABLE;

   fxMesa->Glide.ColorFormat		= GR_COLORFORMAT_ABGR;
   fxMesa->Glide.Origin			= GR_ORIGIN_LOWER_LEFT;
   fxMesa->Glide.Initialized		= FXFALSE;
}



void tdfxDDInitStateFuncs( GLcontext *ctx )
{
   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);

   ctx->Driver.UpdateState		= tdfxDDInvalidateState;

   ctx->Driver.ClearColor		= tdfxDDClearColor;
   ctx->Driver.DrawBuffer		= tdfxDDDrawBuffer;
   ctx->Driver.ReadBuffer		= tdfxDDReadBuffer;

   ctx->Driver.AlphaFunc		= tdfxDDAlphaFunc;
   ctx->Driver.BlendEquationSeparate	= tdfxDDBlendEquationSeparate;
   ctx->Driver.BlendFuncSeparate	= tdfxDDBlendFuncSeparate;
   ctx->Driver.ClearDepth		= tdfxDDClearDepth;
   ctx->Driver.ColorMask		= tdfxDDColorMask;
   ctx->Driver.CullFace			= tdfxDDCullFace;
   ctx->Driver.FrontFace		= tdfxDDFrontFace;
   ctx->Driver.DepthFunc		= tdfxDDDepthFunc;
   ctx->Driver.DepthMask		= tdfxDDDepthMask;
   ctx->Driver.DepthRange		= tdfxDDDepthRange;
   ctx->Driver.Enable			= tdfxDDEnable;
   ctx->Driver.Fogfv			= tdfxDDFogfv;
   ctx->Driver.LightModelfv		= tdfxDDLightModelfv;
   ctx->Driver.LineWidth		= tdfxDDLineWidth;
   ctx->Driver.PolygonStipple		= tdfxDDPolygonStipple;
   ctx->Driver.RenderMode               = tdfxDDRenderMode;
   ctx->Driver.Scissor			= tdfxDDScissor;
   ctx->Driver.ShadeModel		= tdfxDDShadeModel;

   if ( fxMesa->haveHwStencil ) {
      ctx->Driver.StencilFuncSeparate	= tdfxDDStencilFuncSeparate;
      ctx->Driver.StencilMaskSeparate	= tdfxDDStencilMaskSeparate;
      ctx->Driver.StencilOpSeparate	= tdfxDDStencilOpSeparate;
   }

   ctx->Driver.Viewport			= tdfxDDViewport;
}