Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 648 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa/src/mesa/drivers/dri/r128/r128_texstate.c b/nx-X11/extras/Mesa/src/mesa/drivers/dri/r128/r128_texstate.c
new file mode 100644
index 000000000..c22323b68
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/drivers/dri/r128/r128_texstate.c
@@ -0,0 +1,648 @@
+/* $XFree86: xc/lib/GL/mesa/src/drv/r128/r128_texstate.c,v 1.1 2002/02/22 21:44:58 dawes Exp $ */
+/**************************************************************************
+
+Copyright 1999, 2000 ATI Technologies Inc. and Precision Insight, Inc.,
+                                               Cedar Park, Texas.
+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
+on the rights to use, copy, modify, merge, publish, distribute, sub
+license, 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 (including the next
+paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ATI, PRECISION INSIGHT AND/OR THEIR SUPPLIERS 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.
+
+**************************************************************************/
+
+/*
+ * Authors:
+ *   Gareth Hughes <gareth@valinux.com>
+ *   Kevin E. Martin <martin@valinux.com>
+ *   Brian Paul <brianp@valinux.com>
+ */
+
+#include "glheader.h"
+#include "imports.h"
+#include "context.h"
+#include "macros.h"
+#include "texformat.h"
+
+#include "r128_context.h"
+#include "r128_state.h"
+#include "r128_ioctl.h"
+#include "r128_tris.h"
+#include "r128_tex.h"
+
+
+static void r128SetTexImages( r128ContextPtr rmesa,
+                              const struct gl_texture_object *tObj )
+{
+   r128TexObjPtr t = (r128TexObjPtr) tObj->DriverData;
+   struct gl_texture_image *baseImage = tObj->Image[0][tObj->BaseLevel];
+   int log2Pitch, log2Height, log2Size, log2MinSize;
+   int totalSize;
+   int i;
+   GLint firstLevel, lastLevel;
+
+   assert(t);
+   assert(baseImage);
+
+   if ( R128_DEBUG & DEBUG_VERBOSE_API )
+      fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *) tObj );
+
+   switch (baseImage->TexFormat->MesaFormat) {
+   case MESA_FORMAT_ARGB8888:
+   case MESA_FORMAT_ARGB8888_REV:
+      t->textureFormat = R128_DATATYPE_ARGB8888;
+      break;
+   case MESA_FORMAT_ARGB4444:
+   case MESA_FORMAT_ARGB4444_REV:
+      t->textureFormat = R128_DATATYPE_ARGB4444;
+      break;
+   case MESA_FORMAT_RGB565:
+   case MESA_FORMAT_RGB565_REV:
+      t->textureFormat = R128_DATATYPE_RGB565;
+      break;
+   case MESA_FORMAT_RGB332:
+      t->textureFormat = R128_DATATYPE_RGB8;
+      break;
+   case MESA_FORMAT_CI8:
+      t->textureFormat = R128_DATATYPE_CI8;
+      break;
+   case MESA_FORMAT_YCBCR:
+      t->textureFormat = R128_DATATYPE_YVYU422;
+      break;
+   case MESA_FORMAT_YCBCR_REV:
+      t->textureFormat = R128_DATATYPE_VYUY422;
+      break;
+   default:
+      _mesa_problem(rmesa->glCtx, "Bad texture format in %s", __FUNCTION__);
+   };
+
+   /* Compute which mipmap levels we really want to send to the hardware.
+    */
+
+   driCalculateTextureFirstLastLevel( (driTextureObject *) t );
+   firstLevel = t->base.firstLevel;
+   lastLevel  = t->base.lastLevel;
+
+   log2Pitch = tObj->Image[0][firstLevel]->WidthLog2;
+   log2Height = tObj->Image[0][firstLevel]->HeightLog2;
+   log2Size = MAX2(log2Pitch, log2Height);
+   log2MinSize = log2Size;
+
+   t->base.dirty_images[0] = 0;
+   totalSize = 0;
+   for ( i = firstLevel; i <= lastLevel; i++ ) {
+      const struct gl_texture_image *texImage;
+
+      texImage = tObj->Image[0][i];
+      if ( !texImage || !texImage->Data ) {
+         lastLevel = i - 1;
+	 break;
+      }
+
+      log2MinSize = texImage->MaxLog2;
+
+      t->image[i - firstLevel].offset = totalSize;
+      t->image[i - firstLevel].width  = tObj->Image[0][i]->Width;
+      t->image[i - firstLevel].height = tObj->Image[0][i]->Height;
+
+      t->base.dirty_images[0] |= (1 << i);
+
+      totalSize += (tObj->Image[0][i]->Height *
+		    tObj->Image[0][i]->Width *
+		    tObj->Image[0][i]->TexFormat->TexelBytes);
+
+      /* Offsets must be 32-byte aligned for host data blits and tiling */
+      totalSize = (totalSize + 31) & ~31;
+   }
+
+   t->base.totalSize = totalSize;
+   t->base.firstLevel = firstLevel;
+   t->base.lastLevel = lastLevel;
+
+   /* Set the texture format */
+   t->setup.tex_cntl &= ~(0xf << 16);
+   t->setup.tex_cntl |= t->textureFormat;
+
+   t->setup.tex_combine_cntl = 0x00000000;  /* XXX is this right? */
+
+   t->setup.tex_size_pitch = ((log2Pitch   << R128_TEX_PITCH_SHIFT) |
+			      (log2Size    << R128_TEX_SIZE_SHIFT) |
+			      (log2Height  << R128_TEX_HEIGHT_SHIFT) |
+			      (log2MinSize << R128_TEX_MIN_SIZE_SHIFT));
+
+   for ( i = 0 ; i < R128_MAX_TEXTURE_LEVELS ; i++ ) {
+      t->setup.tex_offset[i]  = 0x00000000;
+   }
+
+   if (firstLevel == lastLevel)
+      t->setup.tex_cntl |= R128_MIP_MAP_DISABLE;
+   else
+      t->setup.tex_cntl &= ~R128_MIP_MAP_DISABLE;
+
+   /* FYI: r128UploadTexImages( rmesa, t ); used to be called here */
+}
+
+
+/* ================================================================
+ * Texture combine functions
+ */
+
+#define COLOR_COMB_DISABLE		(R128_COMB_DIS |		\
+					 R128_COLOR_FACTOR_TEX)
+#define COLOR_COMB_COPY_INPUT		(R128_COMB_COPY_INP |		\
+					 R128_COLOR_FACTOR_TEX)
+#define COLOR_COMB_MODULATE		(R128_COMB_MODULATE |		\
+					 R128_COLOR_FACTOR_TEX)
+#define COLOR_COMB_MODULATE_NTEX	(R128_COMB_MODULATE |		\
+					 R128_COLOR_FACTOR_NTEX)
+#define COLOR_COMB_ADD			(R128_COMB_ADD |		\
+					 R128_COLOR_FACTOR_TEX)
+#define COLOR_COMB_BLEND_TEX		(R128_COMB_BLEND_TEXTURE |	\
+					 R128_COLOR_FACTOR_TEX)
+/* Rage 128 Pro/M3 only! */
+#define COLOR_COMB_BLEND_COLOR		(R128_COMB_MODULATE2X |		\
+					 R128_COMB_FCN_MSB |		\
+					 R128_COLOR_FACTOR_CONST_COLOR)
+
+#define ALPHA_COMB_DISABLE		(R128_COMB_ALPHA_DIS |		\
+					 R128_ALPHA_FACTOR_TEX_ALPHA)
+#define ALPHA_COMB_COPY_INPUT		(R128_COMB_ALPHA_COPY_INP |	\
+					 R128_ALPHA_FACTOR_TEX_ALPHA)
+#define ALPHA_COMB_MODULATE		(R128_COMB_ALPHA_MODULATE |	\
+					 R128_ALPHA_FACTOR_TEX_ALPHA)
+#define ALPHA_COMB_MODULATE_NTEX	(R128_COMB_ALPHA_MODULATE |	\
+					 R128_ALPHA_FACTOR_NTEX_ALPHA)
+#define ALPHA_COMB_ADD			(R128_COMB_ALPHA_ADD |		\
+					 R128_ALPHA_FACTOR_TEX_ALPHA)
+
+#define INPUT_INTERP			(R128_INPUT_FACTOR_INT_COLOR |	\
+					 R128_INP_FACTOR_A_INT_ALPHA)
+#define INPUT_PREVIOUS			(R128_INPUT_FACTOR_PREV_COLOR |	\
+					 R128_INP_FACTOR_A_PREV_ALPHA)
+
+static GLboolean r128UpdateTextureEnv( GLcontext *ctx, int unit )
+{
+   r128ContextPtr rmesa = R128_CONTEXT(ctx);
+   GLint source = rmesa->tmu_source[unit];
+   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[source];
+   const struct gl_texture_object *tObj = texUnit->_Current;
+   const GLenum format = tObj->Image[0][tObj->BaseLevel]->Format;
+   GLuint combine;
+
+   if ( R128_DEBUG & DEBUG_VERBOSE_API ) {
+      fprintf( stderr, "%s( %p, %d )\n",
+	       __FUNCTION__, (void *) ctx, unit );
+   }
+
+   if ( unit == 0 ) {
+      combine = INPUT_INTERP;
+   } else {
+      combine = INPUT_PREVIOUS;
+   }
+
+   /* Set the texture environment state */
+   switch ( texUnit->EnvMode ) {
+   case GL_REPLACE:
+      switch ( format ) {
+      case GL_RGBA:
+      case GL_LUMINANCE_ALPHA:
+      case GL_INTENSITY:
+	 combine |= (COLOR_COMB_DISABLE |		/* C = Ct            */
+		     ALPHA_COMB_DISABLE);		/* A = At            */
+	 break;
+      case GL_RGB:
+      case GL_LUMINANCE:
+	 combine |= (COLOR_COMB_DISABLE |		/* C = Ct            */
+		     ALPHA_COMB_COPY_INPUT);		/* A = Af            */
+	 break;
+      case GL_ALPHA:
+	 combine |= (COLOR_COMB_COPY_INPUT |		/* C = Cf            */
+		     ALPHA_COMB_DISABLE);		/* A = At            */
+	 break;
+      case GL_COLOR_INDEX:
+      default:
+	 return GL_FALSE;
+      }
+      break;
+
+   case GL_MODULATE:
+      switch ( format ) {
+      case GL_RGBA:
+      case GL_LUMINANCE_ALPHA:
+      case GL_INTENSITY:
+	 combine |= (COLOR_COMB_MODULATE |		/* C = CfCt          */
+		     ALPHA_COMB_MODULATE);		/* A = AfAt          */
+	 break;
+      case GL_RGB:
+      case GL_LUMINANCE:
+	 combine |= (COLOR_COMB_MODULATE |		/* C = CfCt          */
+		     ALPHA_COMB_COPY_INPUT);		/* A = Af            */
+	 break;
+      case GL_ALPHA:
+	 combine |= (COLOR_COMB_COPY_INPUT |		/* C = Cf            */
+		     ALPHA_COMB_MODULATE);		/* A = AfAt          */
+	 break;
+      case GL_COLOR_INDEX:
+      default:
+	 return GL_FALSE;
+      }
+      break;
+
+   case GL_DECAL:
+      switch ( format ) {
+      case GL_RGBA:
+	 combine |= (COLOR_COMB_BLEND_TEX |		/* C = Cf(1-At)+CtAt */
+		     ALPHA_COMB_COPY_INPUT);		/* A = Af            */
+	 break;
+      case GL_RGB:
+	 combine |= (COLOR_COMB_DISABLE |		/* C = Ct            */
+		     ALPHA_COMB_COPY_INPUT);		/* A = Af            */
+	 break;
+      case GL_ALPHA:
+      case GL_LUMINANCE:
+      case GL_LUMINANCE_ALPHA:
+      case GL_INTENSITY:
+	 /* Undefined behaviour - just copy the incoming fragment */
+	 combine |= (COLOR_COMB_COPY_INPUT |		/* C = undefined     */
+		     ALPHA_COMB_COPY_INPUT);		/* A = undefined     */
+	 break;
+      case GL_COLOR_INDEX:
+      default:
+	 return GL_FALSE;
+      }
+      break;
+
+   case GL_BLEND:
+      /* Rage 128 Pro and M3 can handle GL_BLEND texturing.
+       */
+      if ( !R128_IS_PLAIN( rmesa ) ) {
+         /* XXX this hasn't been fully tested, I don't have a Pro card. -BP */
+	 switch ( format ) {
+	 case GL_RGBA:
+	 case GL_LUMINANCE_ALPHA:
+	    combine |= (COLOR_COMB_BLEND_COLOR |	/* C = Cf(1-Ct)+CcCt */
+			ALPHA_COMB_MODULATE);		/* A = AfAt          */
+	    break;
+
+	 case GL_RGB:
+	 case GL_LUMINANCE:
+	    combine |= (COLOR_COMB_BLEND_COLOR |	/* C = Cf(1-Ct)+CcCt */
+			ALPHA_COMB_COPY_INPUT);		/* A = Af            */
+	    break;
+
+	 case GL_ALPHA:
+	    combine |= (COLOR_COMB_COPY_INPUT |		/* C = Cf            */
+			ALPHA_COMB_MODULATE);		/* A = AfAt          */
+	    break;
+
+	 case GL_INTENSITY:
+	    /* GH: We could be smarter about this... */
+	    switch ( rmesa->env_color & 0xff000000 ) {
+	    case 0x00000000:
+	       combine |= (COLOR_COMB_BLEND_COLOR |	/* C = Cf(1-It)+CcIt */
+			   ALPHA_COMB_MODULATE_NTEX);	/* A = Af(1-It)      */
+	    default:
+	       combine |= (COLOR_COMB_MODULATE |	/* C = fallback      */
+			   ALPHA_COMB_MODULATE);	/* A = fallback      */
+	       return GL_FALSE;
+	    }
+	    break;
+
+	 case GL_COLOR_INDEX:
+	 default:
+	    return GL_FALSE;
+	 }
+	 break;
+      }
+
+      /* Rage 128 has to fake some cases of GL_BLEND, otherwise fallback
+       * to software rendering.
+       */
+      if ( rmesa->blend_flags ) {
+	 return GL_FALSE;
+      }
+      switch ( format ) {
+      case GL_RGBA:
+      case GL_LUMINANCE_ALPHA:
+	 switch ( rmesa->env_color & 0x00ffffff ) {
+	 case 0x00000000:
+	    combine |= (COLOR_COMB_MODULATE_NTEX |	/* C = Cf(1-Ct)      */
+			ALPHA_COMB_MODULATE);		/* A = AfAt          */
+	    break;
+#if 0
+         /* This isn't right - BP */
+	 case 0x00ffffff:
+	    if ( unit == 0 ) {
+	       combine |= (COLOR_COMB_MODULATE_NTEX |	/* C = Cf(1-Ct)      */
+			   ALPHA_COMB_MODULATE);	/* A = AfAt          */
+	    } else {
+	       combine |= (COLOR_COMB_ADD |		/* C = Cf+Ct         */
+			   ALPHA_COMB_COPY_INPUT);	/* A = Af            */
+	    }
+	    break;
+#endif
+	 default:
+	    combine |= (COLOR_COMB_MODULATE |		/* C = fallback      */
+			ALPHA_COMB_MODULATE);		/* A = fallback      */
+	    return GL_FALSE;
+	 }
+	 break;
+      case GL_RGB:
+      case GL_LUMINANCE:
+	 switch ( rmesa->env_color & 0x00ffffff ) {
+	 case 0x00000000:
+	    combine |= (COLOR_COMB_MODULATE_NTEX |	/* C = Cf(1-Ct)      */
+			ALPHA_COMB_COPY_INPUT);		/* A = Af            */
+	    break;
+#if 0
+         /* This isn't right - BP */
+	 case 0x00ffffff:
+	    if ( unit == 0 ) {
+	       combine |= (COLOR_COMB_MODULATE_NTEX |	/* C = Cf(1-Ct)      */
+			   ALPHA_COMB_COPY_INPUT);	/* A = Af            */
+	    } else {
+	       combine |= (COLOR_COMB_ADD |		/* C = Cf+Ct         */
+			   ALPHA_COMB_COPY_INPUT);	/* A = Af            */
+	    }
+	    break;
+#endif
+	 default:
+	    combine |= (COLOR_COMB_MODULATE |		/* C = fallback      */
+			ALPHA_COMB_COPY_INPUT);		/* A = fallback      */
+	    return GL_FALSE;
+	 }
+	 break;
+      case GL_ALPHA:
+	 if ( unit == 0 ) {
+	    combine |= (COLOR_COMB_COPY_INPUT |		/* C = Cf            */
+			ALPHA_COMB_MODULATE);		/* A = AfAt          */
+	 } else {
+	    combine |= (COLOR_COMB_COPY_INPUT |		/* C = Cf            */
+			ALPHA_COMB_COPY_INPUT);		/* A = Af            */
+	 }
+	 break;
+      case GL_INTENSITY:
+	 switch ( rmesa->env_color & 0x00ffffff ) {
+	 case 0x00000000:
+	    combine |= COLOR_COMB_MODULATE_NTEX;	/* C = Cf(1-It)      */
+	    break;
+#if 0
+         /* This isn't right - BP */
+	 case 0x00ffffff:
+	    if ( unit == 0 ) {
+	       combine |= COLOR_COMB_MODULATE_NTEX;	/* C = Cf(1-It)      */
+	    } else {
+	       combine |= COLOR_COMB_ADD;		/* C = Cf+It         */
+	    }
+	    break;
+#endif
+	 default:
+	    combine |= (COLOR_COMB_MODULATE |		/* C = fallback      */
+			ALPHA_COMB_MODULATE);		/* A = fallback      */
+	    return GL_FALSE;
+	 }
+	 switch ( rmesa->env_color & 0xff000000 ) {
+	 case 0x00000000:
+	    combine |= ALPHA_COMB_MODULATE_NTEX;	/* A = Af(1-It)      */
+	    break;
+#if 0
+         /* This isn't right - BP */
+	 case 0xff000000:
+	    if ( unit == 0 ) {
+	       combine |= ALPHA_COMB_MODULATE_NTEX;	/* A = Af(1-It)      */
+	    } else {
+	       combine |= ALPHA_COMB_ADD;		/* A = Af+It         */
+	    }
+	    break;
+#endif
+	 default:
+	    combine |= (COLOR_COMB_MODULATE |		/* C = fallback      */
+			ALPHA_COMB_MODULATE);		/* A = fallback      */
+	    return GL_FALSE;
+	 }
+	 break;
+      case GL_COLOR_INDEX:
+      default:
+	 return GL_FALSE;
+      }
+      break;
+
+   case GL_ADD:
+      switch ( format ) {
+      case GL_RGBA:
+      case GL_LUMINANCE_ALPHA:
+	 combine |= (COLOR_COMB_ADD |			/* C = Cf+Ct         */
+		     ALPHA_COMB_MODULATE);		/* A = AfAt          */
+	 break;
+      case GL_RGB:
+      case GL_LUMINANCE:
+	 combine |= (COLOR_COMB_ADD |			/* C = Cf+Ct         */
+		     ALPHA_COMB_COPY_INPUT);		/* A = Af            */
+	 break;
+      case GL_ALPHA:
+	 combine |= (COLOR_COMB_COPY_INPUT |		/* C = Cf            */
+		     ALPHA_COMB_MODULATE);		/* A = AfAt          */
+	 break;
+      case GL_INTENSITY:
+	 combine |= (COLOR_COMB_ADD |			/* C = Cf+Ct         */
+		     ALPHA_COMB_ADD);			/* A = Af+At         */
+	 break;
+      case GL_COLOR_INDEX:
+      default:
+	 return GL_FALSE;
+      }
+      break;
+
+   default:
+      return GL_FALSE;
+   }
+
+   if ( rmesa->tex_combine[unit] != combine ) {
+     rmesa->tex_combine[unit] = combine;
+     rmesa->dirty |= R128_UPLOAD_TEX0 << unit;
+   }
+   return GL_TRUE;
+}
+
+static void disable_tex( GLcontext *ctx, int unit )
+{
+   r128ContextPtr rmesa = R128_CONTEXT(ctx);
+
+   FLUSH_BATCH( rmesa );
+
+   if ( rmesa->CurrentTexObj[unit] ) {
+      rmesa->CurrentTexObj[unit]->base.bound &= ~(1 << unit);
+      rmesa->CurrentTexObj[unit] = NULL;
+   }
+
+   rmesa->setup.tex_cntl_c &= ~(R128_TEXMAP_ENABLE << unit);
+   rmesa->setup.tex_size_pitch_c &= ~(R128_TEX_SIZE_PITCH_MASK << 
+				      (R128_SEC_TEX_SIZE_PITCH_SHIFT * unit));
+   rmesa->dirty |= R128_UPLOAD_CONTEXT;
+
+   /* If either texture unit is disabled, then multitexturing is not
+    * happening.
+    */
+
+   rmesa->blend_flags &= ~R128_BLEND_MULTITEX;
+}
+
+static GLboolean enable_tex_2d( GLcontext *ctx, int unit )
+{
+   r128ContextPtr rmesa = R128_CONTEXT(ctx);
+   const int source = rmesa->tmu_source[unit];
+   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[source];
+   const struct gl_texture_object *tObj = texUnit->_Current;
+   r128TexObjPtr t = (r128TexObjPtr) tObj->DriverData;
+
+   /* Need to load the 2d images associated with this unit.
+    */
+   if ( t->base.dirty_images[0] ) {
+      /* FIXME: For Radeon, RADEON_FIREVERTICES is called here.  Should
+       * FIXME: something similar be done for R128?
+       */
+      /*  FLUSH_BATCH( rmesa ); */
+
+      r128SetTexImages( rmesa, tObj );
+      r128UploadTexImages( rmesa, t );
+      if ( !t->base.memBlock ) 
+	  return GL_FALSE;
+   }
+
+   return GL_TRUE;
+}
+
+static GLboolean update_tex_common( GLcontext *ctx, int unit )
+{
+   r128ContextPtr rmesa = R128_CONTEXT(ctx);
+   const int source = rmesa->tmu_source[unit];
+   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[source];
+   const struct gl_texture_object *tObj = texUnit->_Current;
+   r128TexObjPtr t = (r128TexObjPtr) tObj->DriverData;
+
+
+   /* Fallback if there's a texture border */
+   if ( tObj->Image[0][tObj->BaseLevel]->Border > 0 ) {
+      return GL_FALSE;
+   }
+
+
+   /* Update state if this is a different texture object to last
+    * time.
+    */
+   if ( rmesa->CurrentTexObj[unit] != t ) {
+      if ( rmesa->CurrentTexObj[unit] != NULL ) {
+	 /* The old texture is no longer bound to this texture unit.
+	  * Mark it as such.
+	  */
+
+	 rmesa->CurrentTexObj[unit]->base.bound &= 
+	     ~(1UL << unit);
+      }
+
+      rmesa->CurrentTexObj[unit] = t;
+      t->base.bound |= (1UL << unit);
+      rmesa->dirty |= R128_UPLOAD_TEX0 << unit;
+
+      driUpdateTextureLRU( (driTextureObject *) t ); /* XXX: should be locked! */
+   }
+
+   /* FIXME: We need to update the texture unit if any texture parameters have
+    * changed, but this texture was already bound.  This could be changed to
+    * work like the Radeon driver where the texture object has it's own
+    * dirty state flags
+    */
+   rmesa->dirty |= R128_UPLOAD_TEX0 << unit;
+
+   /* register setup */
+   rmesa->setup.tex_size_pitch_c &= ~(R128_TEX_SIZE_PITCH_MASK << 
+				      (R128_SEC_TEX_SIZE_PITCH_SHIFT * unit));
+
+   if ( unit == 0 ) {
+      rmesa->setup.tex_cntl_c       |= R128_TEXMAP_ENABLE;
+      rmesa->setup.tex_size_pitch_c |= t->setup.tex_size_pitch << 0;
+      rmesa->setup.scale_3d_cntl    &= ~R128_TEX_CACHE_SPLIT;
+      t->setup.tex_cntl             &= ~R128_SEC_SELECT_SEC_ST;
+   }
+   else {
+      rmesa->setup.tex_cntl_c       |= R128_SEC_TEXMAP_ENABLE;
+      rmesa->setup.tex_size_pitch_c |= t->setup.tex_size_pitch << 16;
+      rmesa->setup.scale_3d_cntl    |= R128_TEX_CACHE_SPLIT;
+      t->setup.tex_cntl             |=  R128_SEC_SELECT_SEC_ST;
+
+      /* If the second TMU is enabled, then multitexturing is happening.
+       */
+      if ( R128_IS_PLAIN( rmesa ) )
+	  rmesa->blend_flags            |= R128_BLEND_MULTITEX;
+   }
+
+   rmesa->dirty |= R128_UPLOAD_CONTEXT;
+
+
+   /* FIXME: The Radeon has some cached state so that it can avoid calling
+    * FIXME: UpdateTextureEnv in some cases.  Is that possible here?
+    */
+   return r128UpdateTextureEnv( ctx, unit );
+}
+
+static GLboolean updateTextureUnit( GLcontext *ctx, int unit )
+{
+   r128ContextPtr rmesa = R128_CONTEXT(ctx);
+   const int source = rmesa->tmu_source[unit];
+   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[source];
+
+
+   if (texUnit->_ReallyEnabled & (TEXTURE_1D_BIT | TEXTURE_2D_BIT)) {
+      return (enable_tex_2d( ctx, unit ) &&
+	      update_tex_common( ctx, unit ));
+   }
+   else if ( texUnit->_ReallyEnabled ) {
+      return GL_FALSE;
+   }
+   else {
+      disable_tex( ctx, unit );
+      return GL_TRUE;
+   }
+}
+
+
+void r128UpdateTextureState( GLcontext *ctx )
+{
+   r128ContextPtr rmesa = R128_CONTEXT(ctx);
+   GLboolean ok;
+
+
+   /* This works around a quirk with the R128 hardware.  If only OpenGL 
+    * TEXTURE1 is enabled, then the hardware TEXTURE0 must be used.  The
+    * hardware TEXTURE1 can ONLY be used when hardware TEXTURE0 is also used.
+    */
+
+   rmesa->tmu_source[0] = 0;
+   rmesa->tmu_source[1] = 1;
+
+   if ((ctx->Texture._EnabledUnits & 0x03) == 0x02) {
+      /* only texture 1 enabled */
+      rmesa->tmu_source[0] = 1;
+      rmesa->tmu_source[1] = 0;
+   }
+
+   ok = (updateTextureUnit( ctx, 0 ) &&
+	 updateTextureUnit( ctx, 1 ));
+
+   FALLBACK( rmesa, R128_FALLBACK_TEXTURE, !ok );
+}