Initial add of some (disabled) SiS 6326 drawing code integrated from Alan Cox's

last drop I saw, which was in turn based on a code drop of mine.  Texturing,
culling, and several extensions are unimplemented, and some features could
probably be improved. It's untested, but there don't appear to be regressions on
the 300-series code, so I'd like to get these bits in now so that it can be
worked on as not a huge diff.

1 files changed, 753 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/sis/sis6326_state.c b/src/mesa/drivers/dri/sis/sis6326_state.c
new file mode 100644
index 0000000000..be229d019f
--- /dev/null
+++ b/src/mesa/drivers/dri/sis/sis6326_state.c
@@ -0,0 +1,753 @@
+/*
+ * Copyright 2005 Eric Anholt
+ * 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 (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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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:
+ *    Eric Anholt <anholt@FreeBSD.org>
+ *
+ */
+
+#include "sis_context.h"
+#include "sis_state.h"
+#include "sis_tris.h"
+#include "sis_lock.h"
+#include "sis_tex.h"
+#include "sis_reg.h"
+
+#include "context.h"
+#include "enums.h"
+#include "colormac.h"
+#include "swrast/swrast.h"
+#include "array_cache/acache.h"
+#include "tnl/tnl.h"
+#include "swrast_setup/swrast_setup.h"
+
+#include "tnl/t_pipeline.h"
+
+/* =============================================================
+ * Alpha blending
+ */
+
+static void
+sis6326DDAlphaFunc( GLcontext *ctx, GLenum func, GLfloat ref )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+   GLubyte refbyte;
+
+   __GLSiSHardware *prev = &smesa->prev;
+   __GLSiSHardware *current = &smesa->current;
+
+   CLAMPED_FLOAT_TO_UBYTE(refbyte, ref);
+   current->hwAlpha = refbyte << 16;
+
+   /* Alpha Test function */
+   switch (func)
+   {
+   case GL_NEVER:
+      current->hwAlpha |= S_ASET_PASS_NEVER;
+      break;
+   case GL_LESS:
+      current->hwAlpha |= S_ASET_PASS_LESS;
+      break;
+   case GL_EQUAL:
+      current->hwAlpha |= S_ASET_PASS_EQUAL;
+      break;
+   case GL_LEQUAL:
+      current->hwAlpha |= S_ASET_PASS_LEQUAL;
+      break;
+   case GL_GREATER:
+      current->hwAlpha |= S_ASET_PASS_GREATER;
+      break;
+   case GL_NOTEQUAL:
+      current->hwAlpha |= S_ASET_PASS_NOTEQUAL;
+      break;
+   case GL_GEQUAL:
+      current->hwAlpha |= S_ASET_PASS_GEQUAL;
+      break;
+   case GL_ALWAYS:
+      current->hwAlpha |= S_ASET_PASS_ALWAYS;
+      break;
+   }
+
+   prev->hwAlpha = current->hwAlpha;
+   smesa->GlobalFlag |= GFLAG_ALPHASETTING;
+}
+
+static void
+sis6326DDBlendFuncSeparate( GLcontext *ctx, 
+			    GLenum sfactorRGB, GLenum dfactorRGB,
+			    GLenum sfactorA,   GLenum dfactorA )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+
+   __GLSiSHardware *prev = &smesa->prev;
+   __GLSiSHardware *current = &smesa->current;
+
+   current->hwDstSrcBlend = 0;
+
+   switch (dfactorRGB)
+   {
+   case GL_ZERO:
+      current->hwDstSrcBlend |= S_DBLEND_ZERO;
+      break;
+   case GL_ONE:
+      current->hwDstSrcBlend |= S_DBLEND_ONE;
+      break;
+   case GL_SRC_COLOR:
+      current->hwDstSrcBlend |= S_DBLEND_SRC_COLOR;
+      break;
+   case GL_ONE_MINUS_SRC_COLOR:
+      current->hwDstSrcBlend |= S_DBLEND_INV_SRC_COLOR;
+      break;
+   case GL_SRC_ALPHA:
+      current->hwDstSrcBlend |= S_DBLEND_SRC_ALPHA;
+      break;
+   case GL_ONE_MINUS_SRC_ALPHA:
+      current->hwDstSrcBlend |= S_DBLEND_INV_SRC_ALPHA;
+      break;
+   case GL_DST_ALPHA:
+      current->hwDstSrcBlend |= S_DBLEND_DST_ALPHA;
+      break;
+   case GL_ONE_MINUS_DST_ALPHA:
+      current->hwDstSrcBlend |= S_DBLEND_INV_DST_ALPHA;
+      break;
+   }
+
+   switch (sfactorRGB)
+   {
+   case GL_ZERO:
+      current->hwDstSrcBlend |= S_SBLEND_ZERO;
+      break;
+   case GL_ONE:
+      current->hwDstSrcBlend |= S_SBLEND_ONE;
+      break;
+   case GL_SRC_ALPHA:
+      current->hwDstSrcBlend |= S_SBLEND_SRC_ALPHA;
+      break;
+   case GL_ONE_MINUS_SRC_ALPHA:
+      current->hwDstSrcBlend |= S_SBLEND_INV_SRC_ALPHA;
+      break;
+   case GL_DST_ALPHA:
+      current->hwDstSrcBlend |= S_SBLEND_DST_ALPHA;
+      break;
+   case GL_ONE_MINUS_DST_ALPHA:
+      current->hwDstSrcBlend |= S_SBLEND_INV_DST_ALPHA;
+      break;
+   case GL_DST_COLOR:
+      current->hwDstSrcBlend |= S_SBLEND_DST_COLOR;
+      break;
+   case GL_ONE_MINUS_DST_COLOR:
+      current->hwDstSrcBlend |= S_SBLEND_INV_DST_COLOR;
+      break;
+   case GL_SRC_ALPHA_SATURATE:
+      current->hwDstSrcBlend |= S_SBLEND_SRC_ALPHA_SAT;
+      break;
+   }
+
+   if (current->hwDstSrcBlend != prev->hwDstSrcBlend) {
+      prev->hwDstSrcBlend = current->hwDstSrcBlend;
+      smesa->GlobalFlag |= GFLAG_DSTBLEND;
+   }
+}
+
+/* =============================================================
+ * Depth testing
+ */
+
+static void
+sis6326DDDepthFunc( GLcontext *ctx, GLenum func )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+   __GLSiSHardware *prev = &smesa->prev;
+   __GLSiSHardware *current = &smesa->current;
+
+   current->hwZ &= ~MASK_6326_ZTestMode;
+   switch (func)
+   {
+   case GL_LESS:
+      current->hwZ |= S_ZSET_PASS_LESS;
+      break;
+   case GL_GEQUAL:
+      current->hwZ |= S_ZSET_PASS_GEQUAL;
+      break;
+   case GL_LEQUAL:
+      current->hwZ |= S_ZSET_PASS_LEQUAL;
+      break;
+   case GL_GREATER:
+      current->hwZ |= S_ZSET_PASS_GREATER;
+      break;
+   case GL_NOTEQUAL:
+      current->hwZ |= S_ZSET_PASS_NOTEQUAL;
+      break;
+   case GL_EQUAL:
+      current->hwZ |= S_ZSET_PASS_EQUAL;
+      break;
+   case GL_ALWAYS:
+      current->hwZ |= S_ZSET_PASS_ALWAYS;
+      break;
+   case GL_NEVER:
+      current->hwZ |= S_ZSET_PASS_NEVER;
+      break;
+   }
+
+   if (current->hwZ != prev->hwZ) {
+      prev->hwZ = current->hwZ;
+      smesa->GlobalFlag |= GFLAG_ZSETTING;
+   }
+}
+
+static void
+sis6326DDDepthMask( GLcontext *ctx, GLboolean flag )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+   __GLSiSHardware *current = &smesa->current;
+
+   if (ctx->Depth.Test)
+      current->hwCapEnable |= S_ENABLE_ZWrite;
+   else
+      current->hwCapEnable &= ~S_ENABLE_ZWrite;
+}
+
+/* =============================================================
+ * Fog
+ */
+
+static void
+sis6326DDFogfv( GLcontext *ctx, GLenum pname, const GLfloat *params )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+   __GLSiSHardware *current = &smesa->current;
+   __GLSiSHardware *prev = &smesa->prev;
+
+   GLint fogColor;
+
+   switch(pname)
+   {
+   case GL_FOG_COLOR:
+      fogColor  = FLOAT_TO_UBYTE( ctx->Fog.Color[0] ) << 16;
+      fogColor |= FLOAT_TO_UBYTE( ctx->Fog.Color[1] ) << 8;
+      fogColor |= FLOAT_TO_UBYTE( ctx->Fog.Color[2] );
+      current->hwFog = 0x01000000 | fogColor;
+      if (current->hwFog != prev->hwFog) {
+	 prev->hwFog = current->hwFog;
+	 smesa->GlobalFlag |= GFLAG_FOGSETTING;
+      }
+      break;
+   }
+}
+
+/* =============================================================
+ * Clipping
+ */
+
+void
+sis6326UpdateClipping(GLcontext *ctx)
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+
+   __GLSiSHardware *prev = &smesa->prev;
+   __GLSiSHardware *current = &smesa->current;
+
+   GLint x1, y1, x2, y2;
+
+   x1 = 0;
+   y1 = 0;
+   x2 = smesa->width - 1;
+   y2 = smesa->height - 1;
+
+   if (ctx->Scissor.Enabled) {
+      if (ctx->Scissor.X > x1)
+	 x1 = ctx->Scissor.X;
+      if (ctx->Scissor.Y > y1)
+	 y1 = ctx->Scissor.Y;
+      if (ctx->Scissor.X + ctx->Scissor.Width - 1 < x2)
+	 x2 = ctx->Scissor.X + ctx->Scissor.Width - 1;
+      if (ctx->Scissor.Y + ctx->Scissor.Height - 1 < y2)
+	 y2 = ctx->Scissor.Y + ctx->Scissor.Height - 1;
+   }
+
+   y1 = Y_FLIP(y1);
+   y2 = Y_FLIP(y2);
+
+   /*current->clipTopBottom = (y2 << 13) | y1;
+   current->clipLeftRight = (x1 << 13) | x2;*/ /* XXX */
+   current->clipTopBottom = (0 << 13) | smesa->height;
+   current->clipLeftRight = (0 << 13) | smesa->width;
+
+   if ((current->clipTopBottom != prev->clipTopBottom) ||
+       (current->clipLeftRight != prev->clipLeftRight)) {
+      prev->clipTopBottom = current->clipTopBottom;
+      prev->clipLeftRight = current->clipLeftRight;
+      smesa->GlobalFlag |= GFLAG_CLIPPING;
+   }
+}
+
+static void
+sis6326DDScissor( GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h )
+{
+   if (ctx->Scissor.Enabled)
+      sis6326UpdateClipping( ctx );
+}
+
+/* =============================================================
+ * Culling
+ */
+
+static void
+sis6326UpdateCull( GLcontext *ctx )
+{
+   /* XXX culling */
+}
+
+
+static void
+sis6326DDCullFace( GLcontext *ctx, GLenum mode )
+{
+   sis6326UpdateCull( ctx );
+}
+
+static void
+sis6326DDFrontFace( GLcontext *ctx, GLenum mode )
+{
+   sis6326UpdateCull( ctx );
+}
+
+/* =============================================================
+ * Masks
+ */
+
+static void sis6326DDColorMask( GLcontext *ctx,
+				GLboolean r, GLboolean g,
+				GLboolean b, GLboolean a )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+	
+   if (r && g && b && ((ctx->Visual.alphaBits == 0) || a)) {
+      FALLBACK(smesa, SIS_FALLBACK_WRITEMASK, 0);
+   } else {
+      FALLBACK(smesa, SIS_FALLBACK_WRITEMASK, 1);
+   }
+}
+
+/* =============================================================
+ * Rendering attributes
+ */
+
+static void sis6326UpdateSpecular(GLcontext *ctx)
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+   __GLSiSHardware *current = &smesa->current;
+
+   if (NEED_SECONDARY_COLOR(ctx))
+      current->hwCapEnable |= S_ENABLE_Specular;
+   else
+      current->hwCapEnable &= ~S_ENABLE_Specular;
+}
+
+static void sis6326DDLightModelfv(GLcontext *ctx, GLenum pname,
+			      const GLfloat *param)
+{
+   if (pname == GL_LIGHT_MODEL_COLOR_CONTROL) {
+      sis6326UpdateSpecular(ctx);
+   }
+}
+static void sis6326DDShadeModel( GLcontext *ctx, GLenum mode )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+
+   /* Signal to sisRasterPrimitive to recalculate dwPrimitiveSet */
+   smesa->hw_primitive = -1;
+}
+
+/* =============================================================
+ * Window position
+ */
+
+/* =============================================================
+ * Viewport
+ */
+
+static void sis6326CalcViewport( GLcontext *ctx )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+   const GLfloat *v = ctx->Viewport._WindowMap.m;
+   GLfloat *m = smesa->hw_viewport;
+
+   /* See also sis_translate_vertex.
+    */
+   m[MAT_SX] =   v[MAT_SX];
+   m[MAT_TX] =   v[MAT_TX] + SUBPIXEL_X;
+   m[MAT_SY] = - v[MAT_SY];
+   m[MAT_TY] = - v[MAT_TY] + smesa->driDrawable->h + SUBPIXEL_Y;
+   m[MAT_SZ] =   v[MAT_SZ] * smesa->depth_scale;
+   m[MAT_TZ] =   v[MAT_TZ] * smesa->depth_scale;
+}
+
+static void sis6326DDViewport( GLcontext *ctx,
+			   GLint x, GLint y,
+			   GLsizei width, GLsizei height )
+{
+   sis6326CalcViewport( ctx );
+}
+
+static void sis6326DDDepthRange( GLcontext *ctx,
+			     GLclampd nearval, GLclampd farval )
+{
+   sis6326CalcViewport( ctx );
+}
+
+/* =============================================================
+ * Miscellaneous
+ */
+
+static void
+sis6326DDLogicOpCode( GLcontext *ctx, GLenum opcode )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+
+   __GLSiSHardware *prev = &smesa->prev;
+   __GLSiSHardware *current = &smesa->current;
+
+   if (!ctx->Color.ColorLogicOpEnabled)
+      return;
+
+   current->hwDstSet &= ~MASK_ROP2;
+   switch (opcode)
+   {
+   case GL_CLEAR:
+      current->hwDstSet |= LOP_CLEAR;
+      break;
+   case GL_SET:
+      current->hwDstSet |= LOP_SET;
+      break;
+   case GL_COPY:
+      current->hwDstSet |= LOP_COPY;
+      break;
+   case GL_COPY_INVERTED:
+      current->hwDstSet |= LOP_COPY_INVERTED;
+      break;
+   case GL_NOOP:
+      current->hwDstSet |= LOP_NOOP;
+      break;
+   case GL_INVERT:
+      current->hwDstSet |= LOP_INVERT;
+      break;
+   case GL_AND:
+      current->hwDstSet |= LOP_AND;
+      break;
+   case GL_NAND:
+      current->hwDstSet |= LOP_NAND;
+      break;
+   case GL_OR:
+      current->hwDstSet |= LOP_OR;
+      break;
+   case GL_NOR:
+      current->hwDstSet |= LOP_NOR;
+      break;
+   case GL_XOR:
+      current->hwDstSet |= LOP_XOR;
+      break;
+   case GL_EQUIV:
+      current->hwDstSet |= LOP_EQUIV;
+      break;
+   case GL_AND_REVERSE:
+      current->hwDstSet |= LOP_AND_REVERSE;
+      break;
+   case GL_AND_INVERTED:
+      current->hwDstSet |= LOP_AND_INVERTED;
+      break;
+   case GL_OR_REVERSE:
+      current->hwDstSet |= LOP_OR_REVERSE;
+      break;
+   case GL_OR_INVERTED:
+      current->hwDstSet |= LOP_OR_INVERTED;
+      break;
+   }
+
+   if (current->hwDstSet != prev->hwDstSet) {
+      prev->hwDstSet = current->hwDstSet;
+      smesa->GlobalFlag |= GFLAG_DESTSETTING;
+   }
+}
+
+void sis6326DDDrawBuffer( GLcontext *ctx, GLenum mode )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+
+   __GLSiSHardware *prev = &smesa->prev;
+   __GLSiSHardware *current = &smesa->current;
+
+   if(getenv("SIS_DRAW_FRONT"))
+      ctx->DrawBuffer->_ColorDrawBufferMask[0] = GL_FRONT_LEFT;
+
+   /*
+    * _DrawDestMask is easier to cope with than <mode>.
+    */
+   current->hwDstSet &= ~MASK_DstBufferPitch;
+   switch ( ctx->DrawBuffer->_ColorDrawBufferMask[0] ) {
+   case BUFFER_BIT_FRONT_LEFT:
+      current->hwOffsetDest = smesa->front.offset;
+      current->hwDstSet |= smesa->front.pitch;
+      FALLBACK( smesa, SIS_FALLBACK_DRAW_BUFFER, GL_FALSE );
+      break;
+   case BUFFER_BIT_BACK_LEFT:
+      current->hwOffsetDest = smesa->back.offset;
+      current->hwDstSet |= smesa->back.pitch;
+      FALLBACK( smesa, SIS_FALLBACK_DRAW_BUFFER, GL_FALSE );
+      break;
+   default:
+      /* GL_NONE or GL_FRONT_AND_BACK or stereo left&right, etc */
+      FALLBACK( smesa, SIS_FALLBACK_DRAW_BUFFER, GL_TRUE );
+      return;
+   }
+
+   if (current->hwDstSet != prev->hwDstSet) {
+      prev->hwDstSet = current->hwDstSet;
+      smesa->GlobalFlag |= GFLAG_DESTSETTING;
+   }
+
+   if (current->hwOffsetDest != prev->hwOffsetDest) {
+      prev->hwOffsetDest = current->hwOffsetDest;
+      smesa->GlobalFlag |= GFLAG_DESTSETTING;
+   }
+}
+
+/* =============================================================
+ * Polygon stipple
+ */
+
+/* =============================================================
+ * Render mode
+ */
+
+/* =============================================================
+ * State enable/disable
+ */
+
+static void
+sis6326DDEnable( GLcontext *ctx, GLenum cap, GLboolean state )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+
+   __GLSiSHardware *current = &smesa->current;
+
+   switch (cap)
+   {
+   case GL_ALPHA_TEST:
+      if (state)
+         current->hwCapEnable |= S_ENABLE_AlphaTest;
+      else
+         current->hwCapEnable &= ~S_ENABLE_AlphaTest;
+      break;
+   case GL_BLEND:
+      /* TODO: */
+      if (state)
+      /* if (state & !ctx->Color.ColorLogicOpEnabled) */
+         current->hwCapEnable |= S_ENABLE_Blend;
+      else
+         current->hwCapEnable &= ~S_ENABLE_Blend;
+      break;
+   case GL_CULL_FACE:
+      /* XXX culling */
+      break;
+   case GL_DEPTH_TEST:
+      if (state && smesa->depth.offset != 0)
+         current->hwCapEnable |= S_ENABLE_ZTest;
+      else
+         current->hwCapEnable &= ~S_ENABLE_ZTest;
+      sis6326DDDepthMask( ctx, ctx->Depth.Mask );
+      break;
+   case GL_DITHER:
+      if (state)
+         current->hwCapEnable |= S_ENABLE_Dither;
+      else
+         current->hwCapEnable &= ~S_ENABLE_Dither;
+      break;
+   case GL_FOG:
+      if (state)
+         current->hwCapEnable |= S_ENABLE_Fog;
+      else
+         current->hwCapEnable &= ~S_ENABLE_Fog;
+      break;
+   case GL_COLOR_LOGIC_OP:
+      if (state)
+         sis6326DDLogicOpCode( ctx, ctx->Color.LogicOp );
+      else
+         sis6326DDLogicOpCode( ctx, GL_COPY );
+      break;
+   case GL_SCISSOR_TEST:
+      sis6326UpdateClipping( ctx );
+      break;
+   case GL_STENCIL_TEST:
+      if (state) {
+         FALLBACK(smesa, SIS_FALLBACK_STENCIL, 1);
+      } else {
+         FALLBACK(smesa, SIS_FALLBACK_STENCIL, 0);
+      }
+      break;
+   case GL_LIGHTING:
+   case GL_COLOR_SUM_EXT:
+      sis6326UpdateSpecular(ctx);
+      break;
+    }
+}
+
+/* =============================================================
+ * State initialization, management
+ */
+
+/* Called before beginning of rendering. */
+void
+sis6326UpdateHWState( GLcontext *ctx )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+   __GLSiSHardware *prev = &smesa->prev;
+   __GLSiSHardware *current = &smesa->current;
+
+   if (smesa->NewGLState & _NEW_TEXTURE)
+      sisUpdateTextureState( ctx );
+
+   if (current->hwCapEnable ^ prev->hwCapEnable) {
+      prev->hwCapEnable = current->hwCapEnable;
+      smesa->GlobalFlag |= GFLAG_ENABLESETTING;
+   }
+
+   if (smesa->GlobalFlag & GFLAG_RENDER_STATES)
+      sis_update_render_state( smesa );
+
+   if (smesa->GlobalFlag & GFLAG_TEXTURE_STATES)
+      sis_update_texture_state( smesa );
+}
+
+static void
+sis6326DDInvalidateState( GLcontext *ctx, GLuint new_state )
+{
+	sisContextPtr smesa = SIS_CONTEXT(ctx);
+
+	_swrast_InvalidateState( ctx, new_state );
+	_swsetup_InvalidateState( ctx, new_state );
+	_ac_InvalidateState( ctx, new_state );
+	_tnl_InvalidateState( ctx, new_state );
+	smesa->NewGLState |= new_state;
+}
+
+/* Initialize the context's hardware state.
+ */
+void sis6326DDInitState( sisContextPtr smesa )
+{
+   __GLSiSHardware *prev = &smesa->prev;
+   __GLSiSHardware *current = &smesa->current;
+   GLcontext *ctx = smesa->glCtx;
+
+   /* add Texture Perspective Enable */
+   current->hwCapEnable = S_ENABLE_TextureCache |
+       S_ENABLE_TexturePerspective | S_ENABLE_Dither;
+
+   /* Z test mode is LESS */
+   current->hwZ = S_ZSET_PASS_LESS | S_ZSET_FORMAT_16;
+   if (ctx->Visual.depthBits > 0)
+      current->hwCapEnable |= S_ENABLE_ZWrite;
+
+   /* Alpha test mode is ALWAYS, alpha ref value is 0 */
+   current->hwAlpha = S_ASET_PASS_ALWAYS;
+
+   /* ROP2 is COPYPEN */
+   current->hwDstSet = LOP_COPY;
+
+   /* LinePattern is 0, Repeat Factor is 0 */
+   current->hwLinePattern = 0x00008000;
+
+   /* Src blend is BLEND_ONE, Dst blend is D3DBLEND_ZERO */
+   current->hwDstSrcBlend = S_SBLEND_ONE | S_DBLEND_ZERO;
+   
+   switch (smesa->bytesPerPixel)
+   {
+   case 2:
+      current->hwDstSet |= DST_FORMAT_RGB_565;
+      break;
+   case 4:
+      current->hwDstSet |= DST_FORMAT_ARGB_8888;
+      break;
+   }
+
+   smesa->depth_scale = 1.0 / (GLfloat)0xffff;
+
+   smesa->clearTexCache = GL_TRUE;
+
+   smesa->clearColorPattern = 0;
+
+   sis6326UpdateZPattern(smesa, 1.0);
+   sis6326UpdateCull(ctx);
+
+   /* Set initial fog settings. Start and end are the same case.  */
+   sis6326DDFogfv( ctx, GL_FOG_DENSITY, &ctx->Fog.Density );
+   sis6326DDFogfv( ctx, GL_FOG_END, &ctx->Fog.End );
+   sis6326DDFogfv( ctx, GL_FOG_MODE, NULL );
+
+   memcpy(prev, current, sizeof(__GLSiSHardware));
+}
+
+/* Initialize the driver's state functions.
+ */
+void sis6326DDInitStateFuncs( GLcontext *ctx )
+{
+   ctx->Driver.UpdateState		= sis6326DDInvalidateState;
+
+   ctx->Driver.Clear			= sis6326DDClear;
+   ctx->Driver.ClearColor		= sis6326DDClearColor;
+   ctx->Driver.ClearDepth		= sis6326DDClearDepth;
+
+   ctx->Driver.AlphaFunc		= sis6326DDAlphaFunc;
+   ctx->Driver.BlendFuncSeparate	= sis6326DDBlendFuncSeparate;
+   ctx->Driver.ColorMask		= sis6326DDColorMask;
+   ctx->Driver.CullFace			= sis6326DDCullFace;
+   ctx->Driver.DepthMask		= sis6326DDDepthMask;
+   ctx->Driver.DepthFunc		= sis6326DDDepthFunc;
+   ctx->Driver.DepthRange		= sis6326DDDepthRange;
+   ctx->Driver.DrawBuffer		= sis6326DDDrawBuffer;
+   ctx->Driver.Enable			= sis6326DDEnable;
+   ctx->Driver.FrontFace	 	= sis6326DDFrontFace;
+   ctx->Driver.Fogfv			= sis6326DDFogfv;
+   ctx->Driver.Hint			= NULL;
+   ctx->Driver.Lightfv			= NULL;
+   ctx->Driver.LogicOpcode	 	= sis6326DDLogicOpCode;
+   ctx->Driver.PolygonMode		= NULL;
+   ctx->Driver.PolygonStipple		= NULL;
+   ctx->Driver.RenderMode	 	= NULL;
+   ctx->Driver.Scissor			= sis6326DDScissor;
+   ctx->Driver.ShadeModel		= sis6326DDShadeModel;
+   ctx->Driver.LightModelfv		= sis6326DDLightModelfv;
+   ctx->Driver.Viewport			= sis6326DDViewport;
+
+   /* Pixel path fallbacks. */
+   ctx->Driver.Accum			= _swrast_Accum;
+   ctx->Driver.Bitmap			= _swrast_Bitmap;
+   ctx->Driver.CopyPixels		= _swrast_CopyPixels;
+   ctx->Driver.DrawPixels		= _swrast_DrawPixels;
+   ctx->Driver.ReadPixels		= _swrast_ReadPixels;
+
+   /* Swrast hooks for imaging extensions: */
+   ctx->Driver.CopyColorTable		= _swrast_CopyColorTable;
+   ctx->Driver.CopyColorSubTable	= _swrast_CopyColorSubTable;
+   ctx->Driver.CopyConvolutionFilter1D	= _swrast_CopyConvolutionFilter1D;
+   ctx->Driver.CopyConvolutionFilter2D	= _swrast_CopyConvolutionFilter2D;
+}