New driver for i915 as well as older i830/i845/i865 chipsets.

1 files changed, 1183 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i915/i830_state.c b/src/mesa/drivers/dri/i915/i830_state.c
new file mode 100644
index 00000000000..4649a759585
--- /dev/null
+++ b/src/mesa/drivers/dri/i915/i830_state.c
@@ -0,0 +1,1183 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ **************************************************************************/
+
+
+#include "glheader.h"
+#include "context.h"
+#include "macros.h"
+#include "enums.h"
+#include "dd.h"
+
+#include "texmem.h"
+
+#include "intel_screen.h"
+#include "intel_batchbuffer.h"
+
+#include "i830_context.h"
+#include "i830_reg.h"
+
+static void i830StencilFunc(GLcontext *ctx, GLenum func, GLint ref,
+			    GLuint mask)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   int test = 0;
+
+   mask = mask & 0xff;
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s : func: %s, ref : 0x%x, mask: 0x%x\n", __FUNCTION__,
+	      _mesa_lookup_enum_by_nr(func), ref, mask);
+
+   switch(func) {
+   case GL_NEVER: 
+      test = COMPAREFUNC_NEVER; 
+      break;
+   case GL_LESS: 
+      test = COMPAREFUNC_LESS; 
+      break;
+   case GL_LEQUAL: 
+      test = COMPAREFUNC_LEQUAL; 
+      break;
+   case GL_GREATER: 
+      test = COMPAREFUNC_GREATER; 
+      break;
+   case GL_GEQUAL: 
+      test = COMPAREFUNC_GEQUAL; 
+      break;
+   case GL_NOTEQUAL: 
+      test = COMPAREFUNC_NOTEQUAL; 
+      break;
+   case GL_EQUAL: 
+      test = COMPAREFUNC_EQUAL; 
+      break;
+   case GL_ALWAYS: 
+      test = COMPAREFUNC_ALWAYS; 
+      break;
+   default:
+      return;
+   }
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+   i830->state.Ctx[I830_CTXREG_STATE4] &= ~MODE4_ENABLE_STENCIL_TEST_MASK;
+   i830->state.Ctx[I830_CTXREG_STATE4] |= (ENABLE_STENCIL_TEST_MASK |
+					STENCIL_TEST_MASK(mask));
+   i830->state.Ctx[I830_CTXREG_STENCILTST] &= ~(STENCIL_REF_VALUE_MASK |
+					     ENABLE_STENCIL_TEST_FUNC_MASK);
+   i830->state.Ctx[I830_CTXREG_STENCILTST] |= (ENABLE_STENCIL_REF_VALUE |
+					    ENABLE_STENCIL_TEST_FUNC |
+					    STENCIL_REF_VALUE(ref) |
+					    STENCIL_TEST_FUNC(test));
+}
+
+static void i830StencilMask(GLcontext *ctx, GLuint mask)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s : mask 0x%x\n", __FUNCTION__, mask);
+
+   mask = mask & 0xff;
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+   i830->state.Ctx[I830_CTXREG_STATE4] &= ~MODE4_ENABLE_STENCIL_WRITE_MASK;
+   i830->state.Ctx[I830_CTXREG_STATE4] |= (ENABLE_STENCIL_WRITE_MASK |
+					STENCIL_WRITE_MASK(mask));
+}
+
+static void i830StencilOp(GLcontext *ctx, GLenum fail, GLenum zfail,
+			  GLenum zpass)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   int fop, dfop, dpop;
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s: fail : %s, zfail: %s, zpass : %s\n", __FUNCTION__,
+	      _mesa_lookup_enum_by_nr(fail),
+	      _mesa_lookup_enum_by_nr(zfail),
+	      _mesa_lookup_enum_by_nr(zpass));
+
+   fop = 0; dfop = 0; dpop = 0;
+
+   switch(fail) {
+   case GL_KEEP: 
+      fop = STENCILOP_KEEP; 
+      break;
+   case GL_ZERO: 
+      fop = STENCILOP_ZERO; 
+      break;
+   case GL_REPLACE: 
+      fop = STENCILOP_REPLACE; 
+      break;
+   case GL_INCR: 
+      fop = STENCILOP_INCRSAT;
+      break;
+   case GL_DECR: 
+      fop = STENCILOP_DECRSAT;
+      break;
+   case GL_INCR_WRAP:
+      fop = STENCILOP_INCR; 
+      break;
+   case GL_DECR_WRAP:
+      fop = STENCILOP_DECR; 
+      break;
+   case GL_INVERT: 
+      fop = STENCILOP_INVERT; 
+      break;
+   default: 
+      break;
+   }
+   switch(zfail) {
+   case GL_KEEP: 
+      dfop = STENCILOP_KEEP; 
+      break;
+   case GL_ZERO: 
+      dfop = STENCILOP_ZERO; 
+      break;
+   case GL_REPLACE: 
+      dfop = STENCILOP_REPLACE; 
+      break;
+   case GL_INCR: 
+      dfop = STENCILOP_INCRSAT;
+      break;
+   case GL_DECR: 
+      dfop = STENCILOP_DECRSAT;
+      break;
+   case GL_INCR_WRAP:
+      dfop = STENCILOP_INCR; 
+      break;
+   case GL_DECR_WRAP:
+      dfop = STENCILOP_DECR; 
+      break;
+   case GL_INVERT: 
+      dfop = STENCILOP_INVERT; 
+      break;
+   default: 
+      break;
+   }
+   switch(zpass) {
+   case GL_KEEP: 
+      dpop = STENCILOP_KEEP; 
+      break;
+   case GL_ZERO: 
+      dpop = STENCILOP_ZERO; 
+      break;
+   case GL_REPLACE: 
+      dpop = STENCILOP_REPLACE; 
+      break;
+   case GL_INCR: 
+      dpop = STENCILOP_INCRSAT;
+      break;
+   case GL_DECR: 
+      dpop = STENCILOP_DECRSAT;
+      break;
+   case GL_INCR_WRAP:
+      dpop = STENCILOP_INCR; 
+      break;
+   case GL_DECR_WRAP:
+      dpop = STENCILOP_DECR; 
+      break;
+   case GL_INVERT: 
+      dpop = STENCILOP_INVERT; 
+      break;
+   default: 
+      break;
+   }
+
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+   i830->state.Ctx[I830_CTXREG_STENCILTST] &= ~(STENCIL_OPS_MASK);
+   i830->state.Ctx[I830_CTXREG_STENCILTST] |= (ENABLE_STENCIL_PARMS |
+					    STENCIL_FAIL_OP(fop) |
+					    STENCIL_PASS_DEPTH_FAIL_OP(dfop) |
+					    STENCIL_PASS_DEPTH_PASS_OP(dpop));
+}
+
+static void i830AlphaFunc(GLcontext *ctx, GLenum func, GLfloat ref)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   int test = 0;
+   GLubyte refByte;
+   GLuint refInt;
+
+   UNCLAMPED_FLOAT_TO_UBYTE(refByte, ref);
+   refInt = (GLuint)refByte;
+
+   switch(func) {
+   case GL_NEVER: 
+      test = COMPAREFUNC_NEVER; 
+      break;
+   case GL_LESS: 
+      test = COMPAREFUNC_LESS; 
+      break;
+   case GL_LEQUAL: 
+      test = COMPAREFUNC_LEQUAL; 
+      break;
+   case GL_GREATER: 
+      test = COMPAREFUNC_GREATER; 
+      break;
+   case GL_GEQUAL: 
+      test = COMPAREFUNC_GEQUAL; 
+      break;
+   case GL_NOTEQUAL: 
+      test = COMPAREFUNC_NOTEQUAL; 
+      break;
+   case GL_EQUAL: 
+      test = COMPAREFUNC_EQUAL; 
+      break;
+   case GL_ALWAYS: 
+      test = COMPAREFUNC_ALWAYS; 
+      break;
+   default:
+      return;
+   }
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+   i830->state.Ctx[I830_CTXREG_STATE2] &= ~ALPHA_TEST_REF_MASK;
+   i830->state.Ctx[I830_CTXREG_STATE2] |= (ENABLE_ALPHA_TEST_FUNC |
+					ENABLE_ALPHA_REF_VALUE |
+					ALPHA_TEST_FUNC(test) |
+					ALPHA_REF_VALUE(refInt));
+}
+
+/* This function makes sure that the proper enables are
+ * set for LogicOp, Independant Alpha Blend, and Blending.
+ * It needs to be called from numerous places where we
+ * could change the LogicOp or Independant Alpha Blend without subsequent
+ * calls to glEnable.
+ */
+static void i830EvalLogicOpBlendState(GLcontext *ctx)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+
+   if (ctx->Color._LogicOpEnabled) {
+      i830->state.Ctx[I830_CTXREG_ENABLES_1] &= ~(ENABLE_COLOR_BLEND |
+					       ENABLE_LOGIC_OP_MASK);
+      i830->state.Ctx[I830_CTXREG_ENABLES_1] |= (DISABLE_COLOR_BLEND |
+					      ENABLE_LOGIC_OP);
+   } else if (ctx->Color.BlendEnabled) {
+      i830->state.Ctx[I830_CTXREG_ENABLES_1] &= ~(ENABLE_COLOR_BLEND |
+					       ENABLE_LOGIC_OP_MASK);
+      i830->state.Ctx[I830_CTXREG_ENABLES_1] |= (ENABLE_COLOR_BLEND |
+					      DISABLE_LOGIC_OP);
+   } else {
+      i830->state.Ctx[I830_CTXREG_ENABLES_1] &= ~(ENABLE_COLOR_BLEND |
+					       ENABLE_LOGIC_OP_MASK);
+      i830->state.Ctx[I830_CTXREG_ENABLES_1] |= (DISABLE_COLOR_BLEND |
+					      DISABLE_LOGIC_OP);
+   }
+}
+
+static void i830BlendColor(GLcontext *ctx, const GLfloat color[4])
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   GLubyte r, g, b, a;
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+   UNCLAMPED_FLOAT_TO_UBYTE(r, color[RCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(g, color[GCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(b, color[BCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(a, color[ACOMP]);
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+   i830->state.Ctx[I830_CTXREG_BLENDCOLOR1] = (a<<24) | (r<<16) | (g<<8) | b;
+}
+
+static void i830BlendEquationSeparate(GLcontext *ctx, GLenum modeRGB,
+				      GLenum modeA) 
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   int func = ENABLE_ALPHA_BLENDFUNC;
+
+   assert( modeRGB == modeA );
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+     fprintf(stderr, "%s %s\n", __FUNCTION__,
+	     _mesa_lookup_enum_by_nr(modeRGB));
+
+   /* This will catch a logicop blend equation */
+   i830EvalLogicOpBlendState(ctx);
+
+   switch(modeRGB) {
+   case GL_FUNC_ADD: 
+      func |= BLENDFUNC_ADD; 
+      break;
+   case GL_MIN: 
+      func |= BLENDFUNC_MIN; 
+      break;
+   case GL_MAX: 
+      func |= BLENDFUNC_MAX; 
+      break;
+   case GL_FUNC_SUBTRACT: 
+      func |= BLENDFUNC_SUB; 
+      break;
+   case GL_FUNC_REVERSE_SUBTRACT: 
+      func |= BLENDFUNC_RVRSE_SUB; 
+      break;
+   case GL_LOGIC_OP:
+   default: return;
+   }
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+   i830->state.Ctx[I830_CTXREG_STATE1] &= ~BLENDFUNC_MASK;
+   i830->state.Ctx[I830_CTXREG_STATE1] |= func;
+}
+
+
+
+static int translate_blend_factor( GLenum factor )
+{
+   switch(factor) {
+   case GL_ZERO: 
+      return BLENDFACT_ZERO; 
+   case GL_SRC_ALPHA: 
+      return BLENDFACT_SRC_ALPHA; 
+   case GL_ONE: 
+      return BLENDFACT_ONE; 
+   case GL_SRC_COLOR: 
+      return BLENDFACT_SRC_COLR; 
+   case GL_ONE_MINUS_SRC_COLOR: 
+      return BLENDFACT_INV_SRC_COLR; 
+   case GL_DST_COLOR: 
+      return BLENDFACT_DST_COLR; 
+   case GL_ONE_MINUS_DST_COLOR: 
+      return BLENDFACT_INV_DST_COLR; 
+   case GL_ONE_MINUS_SRC_ALPHA:
+      return BLENDFACT_INV_SRC_ALPHA; 
+   case GL_DST_ALPHA: 
+      return BLENDFACT_DST_ALPHA; 
+   case GL_ONE_MINUS_DST_ALPHA:
+      return BLENDFACT_INV_DST_ALPHA; 
+   case GL_SRC_ALPHA_SATURATE: 
+      return BLENDFACT_SRC_ALPHA_SATURATE;
+   case GL_CONSTANT_COLOR:
+      return BLENDFACT_CONST_COLOR; 
+   case GL_ONE_MINUS_CONSTANT_COLOR:
+      return BLENDFACT_INV_CONST_COLOR;
+   case GL_CONSTANT_ALPHA:
+      return BLENDFACT_CONST_ALPHA; 
+   case GL_ONE_MINUS_CONSTANT_ALPHA:
+      return BLENDFACT_INV_CONST_ALPHA;
+   default:
+      return BLENDFACT_ZERO;
+   }
+}
+
+static void i830BlendFuncSeparate(GLcontext *ctx, GLenum sfactorRGB, 
+				  GLenum dfactorRGB, GLenum sfactorA,
+				  GLenum dfactorA )
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   int iab = i830->state.Ctx[I830_CTXREG_IALPHAB];
+   int s1 = i830->state.Ctx[I830_CTXREG_STATE1];
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+
+   iab &= ~(SRC_DST_ABLEND_MASK|ENABLE_INDPT_ALPHA_BLEND);
+   s1 &= ~SRC_DST_BLND_MASK;
+      
+   iab |= (ENABLE_SRC_ABLEND_FACTOR|ENABLE_DST_ABLEND_FACTOR);
+   s1 |= (ENABLE_SRC_BLND_FACTOR|ENABLE_DST_BLND_FACTOR);
+
+   if (ctx->Color.BlendEquationRGB == GL_MIN ||
+       ctx->Color.BlendEquationRGB == GL_MAX) {
+      sfactorA = sfactorRGB = dfactorA = dfactorRGB = GL_ONE;
+   }
+
+   iab |= SRC_ABLEND_FACT(translate_blend_factor(sfactorA)); 
+   iab |= DST_ABLEND_FACT(translate_blend_factor(dfactorA)); 
+   s1 |= SRC_BLND_FACT(translate_blend_factor(sfactorRGB)); 
+   s1 |= DST_BLND_FACT(translate_blend_factor(dfactorRGB)); 
+
+   if (sfactorA != sfactorRGB || dfactorA != dfactorRGB) 
+      iab |= ENABLE_INDPT_ALPHA_BLEND;
+   else
+      iab |= DISABLE_INDPT_ALPHA_BLEND;
+
+   if (iab != i830->state.Ctx[I830_CTXREG_IALPHAB] ||
+       s1 != i830->state.Ctx[I830_CTXREG_STATE1]) {
+      I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+      i830->state.Ctx[I830_CTXREG_IALPHAB] = iab;
+      i830->state.Ctx[I830_CTXREG_STATE1] = s1;
+   }
+}
+
+
+
+static void i830DepthFunc(GLcontext *ctx, GLenum func)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   int test = 0;
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+   switch(func) {
+   case GL_NEVER: 
+      test = COMPAREFUNC_NEVER; 
+      break;
+   case GL_LESS: 
+      test = COMPAREFUNC_LESS; 
+      break;
+   case GL_LEQUAL: 
+      test = COMPAREFUNC_LEQUAL; 
+      break;
+   case GL_GREATER: 
+      test = COMPAREFUNC_GREATER; 
+      break;
+   case GL_GEQUAL: 
+      test = COMPAREFUNC_GEQUAL; 
+      break;
+   case GL_NOTEQUAL: 
+      test = COMPAREFUNC_NOTEQUAL; 
+      break;
+   case GL_EQUAL: 
+      test = COMPAREFUNC_EQUAL; 
+      break;
+   case GL_ALWAYS: 
+      test = COMPAREFUNC_ALWAYS; 
+      break;
+   default: return;
+   }
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+   i830->state.Ctx[I830_CTXREG_STATE3] &= ~DEPTH_TEST_FUNC_MASK;
+   i830->state.Ctx[I830_CTXREG_STATE3] |= (ENABLE_DEPTH_TEST_FUNC |
+				       DEPTH_TEST_FUNC(test));
+}
+
+static void i830DepthMask(GLcontext *ctx, GLboolean flag)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s flag (%d)\n", __FUNCTION__, flag);
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+
+   i830->state.Ctx[I830_CTXREG_ENABLES_2] &= ~ENABLE_DIS_DEPTH_WRITE_MASK;
+
+   if (flag && ctx->Depth.Test)
+      i830->state.Ctx[I830_CTXREG_ENABLES_2] |= ENABLE_DEPTH_WRITE;
+   else
+      i830->state.Ctx[I830_CTXREG_ENABLES_2] |= DISABLE_DEPTH_WRITE;
+}
+
+/* =============================================================
+ * Polygon stipple
+ *
+ * The i830 supports a 4x4 stipple natively, GL wants 32x32.
+ * Fortunately stipple is usually a repeating pattern.
+ */
+static void i830PolygonStipple( GLcontext *ctx, const GLubyte *mask )
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   const GLubyte *m = mask;
+   GLubyte p[4];
+   int i,j,k;
+   int active = (ctx->Polygon.StippleFlag &&
+		 i830->intel.reduced_primitive == GL_TRIANGLES);
+   GLuint newMask;
+
+   if (active) {
+      I830_STATECHANGE(i830, I830_UPLOAD_STIPPLE);
+      i830->state.Stipple[I830_STPREG_ST1] &= ~ST1_ENABLE;
+   }
+
+   p[0] = mask[12] & 0xf; p[0] |= p[0] << 4;
+   p[1] = mask[8] & 0xf; p[1] |= p[1] << 4;
+   p[2] = mask[4] & 0xf; p[2] |= p[2] << 4;
+   p[3] = mask[0] & 0xf; p[3] |= p[3] << 4;
+
+   for (k = 0 ; k < 8 ; k++)
+      for (j = 3 ; j >= 0; j--)
+	 for (i = 0 ; i < 4 ; i++, m++)
+	    if (*m != p[j]) {
+	       i830->intel.hw_stipple = 0;
+	       return;
+	    }
+
+   newMask = (((p[0] & 0xf) << 0) |
+	      ((p[1] & 0xf) << 4) |
+	      ((p[2] & 0xf) << 8) |
+	      ((p[3] & 0xf) << 12));
+
+
+   if (newMask == 0xffff || newMask == 0x0) {
+      /* this is needed to make conform pass */
+      i830->intel.hw_stipple = 0;
+      return;
+   }
+
+   i830->state.Stipple[I830_STPREG_ST1] &= ~0xffff;
+   i830->state.Stipple[I830_STPREG_ST1] |= newMask;
+   i830->intel.hw_stipple = 1;
+
+   if (active)
+      i830->state.Stipple[I830_STPREG_ST1] |= ST1_ENABLE;
+}
+
+
+/* =============================================================
+ * Hardware clipping
+ */
+static void i830Scissor(GLcontext *ctx, GLint x, GLint y, 
+			GLsizei w, GLsizei h)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   intelScreenPrivate *screen = i830->intel.intelScreen;
+   int x1, y1, x2, y2;
+
+   if (!i830->intel.driDrawable)
+      return;
+
+   x1 = x;
+   y1 = i830->intel.driDrawable->h - (y + h);
+   x2 = x + w - 1;
+   y2 = y1 + h - 1;
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "[%s] x(%d) y(%d) w(%d) h(%d)\n", __FUNCTION__,
+	      x, y, w, h);
+
+   if (x1 < 0) x1 = 0;
+   if (y1 < 0) y1 = 0;
+   if (x2 < 0) x2 = 0;
+   if (y2 < 0) y2 = 0;
+
+   if (x2 >= screen->width) x2 = screen->width-1;
+   if (y2 >= screen->height) y2 = screen->height-1;
+   if (x1 >= screen->width) x1 = screen->width-1;
+   if (y1 >= screen->height) y1 = screen->height-1;
+
+
+   I830_STATECHANGE(i830, I830_UPLOAD_BUFFERS);
+   i830->state.Buffer[I830_DESTREG_SR1] = (y1 << 16) | (x1 & 0xffff);
+   i830->state.Buffer[I830_DESTREG_SR2] = (y2 << 16) | (x2 & 0xffff);
+}
+
+static void i830LogicOp(GLcontext *ctx, GLenum opcode)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   int tmp = 0;
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+   /* FIXME: This should be a look-up table, like the r200 driver. */
+   switch(opcode) {
+   case GL_CLEAR: 
+      tmp = LOGICOP_CLEAR; 
+      break;
+   case GL_AND: 
+      tmp = LOGICOP_AND; 
+      break;
+   case GL_AND_REVERSE: 
+      tmp = LOGICOP_AND_RVRSE; 
+      break;
+   case GL_COPY: 
+      tmp = LOGICOP_COPY; 
+      break;
+   case GL_COPY_INVERTED: 
+      tmp = LOGICOP_COPY_INV; 
+      break;
+   case GL_AND_INVERTED: 
+      tmp = LOGICOP_AND_INV; 
+      break;
+   case GL_NOOP: 
+      tmp = LOGICOP_NOOP; 
+      break;
+   case GL_XOR: 
+      tmp = LOGICOP_XOR; 
+      break;
+   case GL_OR: 
+      tmp = LOGICOP_OR; 
+      break;
+   case GL_OR_INVERTED: 
+      tmp = LOGICOP_OR_INV; 
+      break;
+   case GL_NOR: 
+      tmp = LOGICOP_NOR; 
+      break;
+   case GL_EQUIV: 
+      tmp = LOGICOP_EQUIV; 
+      break;
+   case GL_INVERT: 
+      tmp = LOGICOP_INV; 
+      break;
+   case GL_OR_REVERSE: 
+      tmp = LOGICOP_OR_RVRSE; 
+      break;
+   case GL_NAND: 
+      tmp = LOGICOP_NAND; 
+      break;
+   case GL_SET: 
+      tmp = LOGICOP_SET; 
+      break;
+   default:
+      return;
+   }
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+   i830->state.Ctx[I830_CTXREG_STATE4] &= ~LOGICOP_MASK;
+   i830->state.Ctx[I830_CTXREG_STATE4] |= LOGIC_OP_FUNC(tmp);
+}
+
+
+
+static void i830CullFaceFrontFace(GLcontext *ctx, GLenum unused)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   GLuint mode;
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+   if (!ctx->Polygon.CullFlag) {
+      mode = CULLMODE_NONE;
+   }
+   else if (ctx->Polygon.CullFaceMode != GL_FRONT_AND_BACK) {
+      mode = CULLMODE_CW;
+
+      if (ctx->Polygon.CullFaceMode == GL_FRONT)
+	 mode ^= (CULLMODE_CW ^ CULLMODE_CCW);
+      if (ctx->Polygon.FrontFace != GL_CCW)
+	 mode ^= (CULLMODE_CW ^ CULLMODE_CCW);
+   }
+   else {
+      mode = CULLMODE_BOTH;
+   }
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+   i830->state.Ctx[I830_CTXREG_STATE3] &= ~CULLMODE_MASK;
+   i830->state.Ctx[I830_CTXREG_STATE3] |= ENABLE_CULL_MODE | mode;
+}
+
+static void i830LineWidth( GLcontext *ctx, GLfloat widthf )
+{
+   i830ContextPtr i830 = I830_CONTEXT( ctx );
+   int width;
+   int state5;
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+   width = (int)(widthf * 2);
+   CLAMP_SELF(width, 1, 15);
+   
+   state5 = i830->state.Ctx[I830_CTXREG_STATE5] & ~FIXED_LINE_WIDTH_MASK;
+   state5 |= (ENABLE_FIXED_LINE_WIDTH | FIXED_LINE_WIDTH(width));
+
+   if (state5 != i830->state.Ctx[I830_CTXREG_STATE5]) {
+      I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+      i830->state.Ctx[I830_CTXREG_STATE5] = state5;
+   }
+}
+
+static void i830PointSize(GLcontext *ctx, GLfloat size)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   GLint point_size = (int)size;
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+     fprintf(stderr, "%s\n", __FUNCTION__);
+
+   CLAMP_SELF(point_size, 1, 256);
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+   i830->state.Ctx[I830_CTXREG_STATE5] &= ~FIXED_POINT_WIDTH_MASK;
+   i830->state.Ctx[I830_CTXREG_STATE5] |= (ENABLE_FIXED_POINT_WIDTH |
+				       FIXED_POINT_WIDTH(point_size));
+}
+
+
+/* =============================================================
+ * Color masks
+ */
+
+static void i830ColorMask(GLcontext *ctx,
+			  GLboolean r, GLboolean g,
+			  GLboolean b, GLboolean a)
+{
+   i830ContextPtr i830 = I830_CONTEXT( ctx );
+   GLuint tmp = 0;
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s r(%d) g(%d) b(%d) a(%d)\n", __FUNCTION__, r, g, b, a);
+
+   tmp = ((i830->state.Ctx[I830_CTXREG_ENABLES_2] & ~WRITEMASK_MASK) |
+	  ENABLE_COLOR_MASK |
+	  ENABLE_COLOR_WRITE |
+	  ((!r) << WRITEMASK_RED_SHIFT) |
+	  ((!g) << WRITEMASK_GREEN_SHIFT) |
+	  ((!b) << WRITEMASK_BLUE_SHIFT) |
+	  ((!a) << WRITEMASK_ALPHA_SHIFT));
+
+   if (tmp != i830->state.Ctx[I830_CTXREG_ENABLES_2]) {
+      I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+      i830->state.Ctx[I830_CTXREG_ENABLES_2] = tmp;
+   }
+}
+
+static void update_specular( GLcontext *ctx )
+{
+   i830ContextPtr i830 = I830_CONTEXT( ctx );
+
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+   i830->state.Ctx[I830_CTXREG_ENABLES_1] &= ~ENABLE_SPEC_ADD_MASK;
+
+   if (NEED_SECONDARY_COLOR(ctx))
+      i830->state.Ctx[I830_CTXREG_ENABLES_1] |= ENABLE_SPEC_ADD;
+   else
+      i830->state.Ctx[I830_CTXREG_ENABLES_1] |= DISABLE_SPEC_ADD;
+}
+
+static void i830LightModelfv(GLcontext *ctx, GLenum pname, 
+			     const GLfloat *param)
+{
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+   if (pname == GL_LIGHT_MODEL_COLOR_CONTROL) {
+      update_specular( ctx );
+   }
+}
+
+/* In Mesa 3.5 we can reliably do native flatshading.
+ */
+static void i830ShadeModel(GLcontext *ctx, GLenum mode)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+
+
+#define SHADE_MODE_MASK ((1<<10)|(1<<8)|(1<<6)|(1<<4))
+
+   i830->state.Ctx[I830_CTXREG_STATE3] &= ~SHADE_MODE_MASK;
+
+   if (mode == GL_FLAT) {
+     i830->state.Ctx[I830_CTXREG_STATE3] |= (ALPHA_SHADE_MODE(SHADE_MODE_FLAT) |
+					  FOG_SHADE_MODE(SHADE_MODE_FLAT) |
+					  SPEC_SHADE_MODE(SHADE_MODE_FLAT) |
+					  COLOR_SHADE_MODE(SHADE_MODE_FLAT));
+   } else {
+     i830->state.Ctx[I830_CTXREG_STATE3] |= (ALPHA_SHADE_MODE(SHADE_MODE_LINEAR) |
+					  FOG_SHADE_MODE(SHADE_MODE_LINEAR) |
+					  SPEC_SHADE_MODE(SHADE_MODE_LINEAR) |
+					  COLOR_SHADE_MODE(SHADE_MODE_LINEAR));
+   }
+}
+
+/* =============================================================
+ * Fog
+ */
+static void i830Fogfv(GLcontext *ctx, GLenum pname, const GLfloat *param)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+
+   if (INTEL_DEBUG&DEBUG_DRI)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+   if (pname == GL_FOG_COLOR) {      
+      GLuint color = (((GLubyte)(ctx->Fog.Color[0]*255.0F) << 16) |
+		      ((GLubyte)(ctx->Fog.Color[1]*255.0F) << 8) |
+		      ((GLubyte)(ctx->Fog.Color[2]*255.0F) << 0));
+
+      I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+      i830->state.Ctx[I830_CTXREG_FOGCOLOR] = (_3DSTATE_FOG_COLOR_CMD | color);
+   }
+}
+
+/* =============================================================
+ */
+
+static void i830Enable(GLcontext *ctx, GLenum cap, GLboolean state)
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+
+   switch(cap) {
+   case GL_LIGHTING:
+   case GL_COLOR_SUM:
+      update_specular( ctx );
+      break;
+
+   case GL_ALPHA_TEST:
+      I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+      i830->state.Ctx[I830_CTXREG_ENABLES_1] &= ~ENABLE_DIS_ALPHA_TEST_MASK;
+      if (state)
+	 i830->state.Ctx[I830_CTXREG_ENABLES_1] |= ENABLE_ALPHA_TEST;
+      else
+	 i830->state.Ctx[I830_CTXREG_ENABLES_1] |= DISABLE_ALPHA_TEST;
+
+      break;
+
+   case GL_BLEND:
+      i830EvalLogicOpBlendState(ctx);
+      break;
+
+   case GL_COLOR_LOGIC_OP:
+      i830EvalLogicOpBlendState(ctx);
+
+      /* Logicop doesn't seem to work at 16bpp:
+       */
+      if (i830->intel.intelScreen->cpp == 2)
+	 FALLBACK( &i830->intel, I830_FALLBACK_LOGICOP, state );
+      break;
+ 
+   case GL_DITHER:
+      I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+      i830->state.Ctx[I830_CTXREG_ENABLES_2] &= ~ENABLE_DITHER;
+
+      if (state)
+	 i830->state.Ctx[I830_CTXREG_ENABLES_2] |= ENABLE_DITHER;
+      else
+	 i830->state.Ctx[I830_CTXREG_ENABLES_2] |= DISABLE_DITHER;
+      break;
+
+   case GL_DEPTH_TEST:
+      I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+      i830->state.Ctx[I830_CTXREG_ENABLES_1] &= ~ENABLE_DIS_DEPTH_TEST_MASK;
+
+      if (state)
+	 i830->state.Ctx[I830_CTXREG_ENABLES_1] |= ENABLE_DEPTH_TEST;
+      else
+	 i830->state.Ctx[I830_CTXREG_ENABLES_1] |= DISABLE_DEPTH_TEST;
+
+      /* Also turn off depth writes when GL_DEPTH_TEST is disabled:
+       */
+      i830DepthMask( ctx, ctx->Depth.Mask );
+      break;
+
+   case GL_SCISSOR_TEST:
+      I830_STATECHANGE(i830, I830_UPLOAD_BUFFERS);
+      
+      if (state)
+	 i830->state.Buffer[I830_DESTREG_SENABLE] = 
+	    (_3DSTATE_SCISSOR_ENABLE_CMD |
+	     ENABLE_SCISSOR_RECT);
+      else
+	 i830->state.Buffer[I830_DESTREG_SENABLE] = 
+	    (_3DSTATE_SCISSOR_ENABLE_CMD |
+	     DISABLE_SCISSOR_RECT);
+
+      break;
+
+   case GL_LINE_SMOOTH:
+      I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+      
+      i830->state.Ctx[I830_CTXREG_AA] &= ~AA_LINE_ENABLE;
+      if (state)
+	 i830->state.Ctx[I830_CTXREG_AA] |= AA_LINE_ENABLE;
+      else
+	 i830->state.Ctx[I830_CTXREG_AA] |= AA_LINE_DISABLE;
+      break;
+
+   case GL_FOG:
+      I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+      i830->state.Ctx[I830_CTXREG_ENABLES_1] &= ~ENABLE_DIS_FOG_MASK;
+      if (state)
+	 i830->state.Ctx[I830_CTXREG_ENABLES_1] |= ENABLE_FOG;
+      else
+	 i830->state.Ctx[I830_CTXREG_ENABLES_1] |= DISABLE_FOG;
+      break;
+
+   case GL_CULL_FACE:
+      i830CullFaceFrontFace(ctx, 0);
+      break;
+
+   case GL_TEXTURE_2D:
+      break;
+
+   case GL_STENCIL_TEST:
+      if (i830->intel.hw_stencil) {
+	 I830_STATECHANGE(i830, I830_UPLOAD_CTX);
+
+	 if (state) {
+	    i830->state.Ctx[I830_CTXREG_ENABLES_1] |= ENABLE_STENCIL_TEST;
+	    i830->state.Ctx[I830_CTXREG_ENABLES_2] |= ENABLE_STENCIL_WRITE;
+	 } else {
+	    i830->state.Ctx[I830_CTXREG_ENABLES_1] &= ~ENABLE_STENCIL_TEST;
+	    i830->state.Ctx[I830_CTXREG_ENABLES_2] &= ~ENABLE_STENCIL_WRITE;
+	    i830->state.Ctx[I830_CTXREG_ENABLES_1] |= DISABLE_STENCIL_TEST;
+	    i830->state.Ctx[I830_CTXREG_ENABLES_2] |= DISABLE_STENCIL_WRITE;
+	 }
+      } else {
+	 FALLBACK( &i830->intel, I830_FALLBACK_STENCIL, state );
+      }
+      break;
+
+   case GL_POLYGON_STIPPLE:
+      /* The stipple command worked on my 855GM box, but not my 845G.
+       * I'll do more testing later to find out exactly which hardware
+       * supports it.  Disabled for now.
+       */
+      if (i830->intel.hw_stipple && 
+	  i830->intel.reduced_primitive == GL_TRIANGLES)
+      {
+	 I830_STATECHANGE(i830, I830_UPLOAD_STIPPLE);
+	 i830->state.Stipple[I830_STPREG_ST1] &= ~ST1_ENABLE;
+	 if (state)
+	    i830->state.Stipple[I830_STPREG_ST1] |= ST1_ENABLE;
+      }
+      break;
+
+   default:
+      ;
+   }
+}
+
+
+static void i830_init_packets( i830ContextPtr i830 )
+{
+   intelScreenPrivate *screen = i830->intel.intelScreen;
+
+   /* Zero all state */
+   memset(&i830->state, 0, sizeof(i830->state));
+
+   /* Set default blend state */
+   i830->state.TexBlend[0][0] = (_3DSTATE_MAP_BLEND_OP_CMD(0) |
+				  TEXPIPE_COLOR |
+				  ENABLE_TEXOUTPUT_WRT_SEL |
+				  TEXOP_OUTPUT_CURRENT |
+				  DISABLE_TEX_CNTRL_STAGE |
+				  TEXOP_SCALE_1X |
+				  TEXOP_MODIFY_PARMS |
+				  TEXOP_LAST_STAGE |
+				  TEXBLENDOP_ARG1);
+   i830->state.TexBlend[0][1] = (_3DSTATE_MAP_BLEND_OP_CMD(0) |
+				  TEXPIPE_ALPHA |
+				  ENABLE_TEXOUTPUT_WRT_SEL |
+				  TEXOP_OUTPUT_CURRENT |
+				  TEXOP_SCALE_1X |
+				  TEXOP_MODIFY_PARMS |
+				  TEXBLENDOP_ARG1);
+   i830->state.TexBlend[0][2] = (_3DSTATE_MAP_BLEND_ARG_CMD(0) |
+				  TEXPIPE_COLOR |
+				  TEXBLEND_ARG1 |
+				  TEXBLENDARG_MODIFY_PARMS |
+				  TEXBLENDARG_DIFFUSE);
+   i830->state.TexBlend[0][3] = (_3DSTATE_MAP_BLEND_ARG_CMD(0) |
+				  TEXPIPE_ALPHA |
+				  TEXBLEND_ARG1 |
+				  TEXBLENDARG_MODIFY_PARMS |
+				  TEXBLENDARG_DIFFUSE);
+
+   i830->state.TexBlendWordsUsed[0] = 4;
+
+
+   i830->state.Ctx[I830_CTXREG_VF] =  0;
+   i830->state.Ctx[I830_CTXREG_VF2] = 0;
+
+   i830->state.Ctx[I830_CTXREG_AA] = (_3DSTATE_AA_CMD |
+				      AA_LINE_ECAAR_WIDTH_ENABLE |
+				      AA_LINE_ECAAR_WIDTH_1_0 |
+				      AA_LINE_REGION_WIDTH_ENABLE |
+				      AA_LINE_REGION_WIDTH_1_0 | 
+				      AA_LINE_DISABLE);
+
+   i830->state.Ctx[I830_CTXREG_ENABLES_1] = (_3DSTATE_ENABLES_1_CMD |
+					     DISABLE_LOGIC_OP |
+					     DISABLE_STENCIL_TEST |
+					     DISABLE_DEPTH_BIAS |
+					     DISABLE_SPEC_ADD |
+					     DISABLE_FOG |
+					     DISABLE_ALPHA_TEST |
+					     DISABLE_COLOR_BLEND |
+					     DISABLE_DEPTH_TEST);
+
+   if (i830->intel.hw_stencil) {
+      i830->state.Ctx[I830_CTXREG_ENABLES_2] = (_3DSTATE_ENABLES_2_CMD |
+						ENABLE_STENCIL_WRITE |
+						ENABLE_TEX_CACHE |
+						ENABLE_DITHER |
+						ENABLE_COLOR_MASK |
+						/* set no color comps disabled */
+						ENABLE_COLOR_WRITE |
+						ENABLE_DEPTH_WRITE);
+   } else {
+      i830->state.Ctx[I830_CTXREG_ENABLES_2] = (_3DSTATE_ENABLES_2_CMD |
+						DISABLE_STENCIL_WRITE |
+						ENABLE_TEX_CACHE |
+						ENABLE_DITHER |
+						ENABLE_COLOR_MASK |
+						/* set no color comps disabled */
+						ENABLE_COLOR_WRITE |
+						ENABLE_DEPTH_WRITE);
+   }
+
+   i830->state.Ctx[I830_CTXREG_STATE1] = (_3DSTATE_MODES_1_CMD |
+					  ENABLE_COLR_BLND_FUNC |
+					  BLENDFUNC_ADD |
+					  ENABLE_SRC_BLND_FACTOR |
+					  SRC_BLND_FACT(BLENDFACT_ONE) | 
+					  ENABLE_DST_BLND_FACTOR |
+					  DST_BLND_FACT(BLENDFACT_ZERO) );
+
+   i830->state.Ctx[I830_CTXREG_STATE2] = (_3DSTATE_MODES_2_CMD |
+					  ENABLE_GLOBAL_DEPTH_BIAS | 
+					  GLOBAL_DEPTH_BIAS(0) |
+					  ENABLE_ALPHA_TEST_FUNC | 
+					  ALPHA_TEST_FUNC(COMPAREFUNC_ALWAYS) |
+					  ALPHA_REF_VALUE(0) );
+
+   i830->state.Ctx[I830_CTXREG_STATE3] = (_3DSTATE_MODES_3_CMD |
+					  ENABLE_DEPTH_TEST_FUNC |
+					  DEPTH_TEST_FUNC(COMPAREFUNC_LESS) |
+					  ENABLE_ALPHA_SHADE_MODE |
+					  ALPHA_SHADE_MODE(SHADE_MODE_LINEAR) |
+					  ENABLE_FOG_SHADE_MODE |
+					  FOG_SHADE_MODE(SHADE_MODE_LINEAR) |
+					  ENABLE_SPEC_SHADE_MODE |
+					  SPEC_SHADE_MODE(SHADE_MODE_LINEAR) |
+					  ENABLE_COLOR_SHADE_MODE |
+					  COLOR_SHADE_MODE(SHADE_MODE_LINEAR) |
+					  ENABLE_CULL_MODE |
+					  CULLMODE_NONE);
+
+   i830->state.Ctx[I830_CTXREG_STATE4] = (_3DSTATE_MODES_4_CMD |
+					  ENABLE_LOGIC_OP_FUNC |
+					  LOGIC_OP_FUNC(LOGICOP_COPY) |
+					  ENABLE_STENCIL_TEST_MASK |
+					  STENCIL_TEST_MASK(0xff) |
+					  ENABLE_STENCIL_WRITE_MASK |
+					  STENCIL_WRITE_MASK(0xff));
+
+   i830->state.Ctx[I830_CTXREG_STENCILTST] = (_3DSTATE_STENCIL_TEST_CMD |
+					      ENABLE_STENCIL_PARMS |
+					      STENCIL_FAIL_OP(STENCILOP_KEEP) |
+					      STENCIL_PASS_DEPTH_FAIL_OP(STENCILOP_KEEP) |
+					      STENCIL_PASS_DEPTH_PASS_OP(STENCILOP_KEEP) |
+					      ENABLE_STENCIL_TEST_FUNC |
+					      STENCIL_TEST_FUNC(COMPAREFUNC_ALWAYS) |
+					      ENABLE_STENCIL_REF_VALUE |
+					      STENCIL_REF_VALUE(0) );
+
+   i830->state.Ctx[I830_CTXREG_STATE5] = (_3DSTATE_MODES_5_CMD |
+					  FLUSH_TEXTURE_CACHE |
+					  ENABLE_SPRITE_POINT_TEX |
+					  SPRITE_POINT_TEX_OFF |
+					  ENABLE_FIXED_LINE_WIDTH |
+					  FIXED_LINE_WIDTH(0x2) | /* 1.0 */
+					  ENABLE_FIXED_POINT_WIDTH |
+					  FIXED_POINT_WIDTH(1) );
+
+   i830->state.Ctx[I830_CTXREG_IALPHAB] = (_3DSTATE_INDPT_ALPHA_BLEND_CMD |
+					   DISABLE_INDPT_ALPHA_BLEND |
+					   ENABLE_ALPHA_BLENDFUNC |
+					   ABLENDFUNC_ADD);
+
+   i830->state.Ctx[I830_CTXREG_FOGCOLOR] = (_3DSTATE_FOG_COLOR_CMD |
+					    FOG_COLOR_RED(0) |
+					    FOG_COLOR_GREEN(0) |
+					    FOG_COLOR_BLUE(0));
+
+   i830->state.Ctx[I830_CTXREG_BLENDCOLOR0] = _3DSTATE_CONST_BLEND_COLOR_CMD;
+   i830->state.Ctx[I830_CTXREG_BLENDCOLOR1] = 0;
+
+   i830->state.Ctx[I830_CTXREG_MCSB0] = _3DSTATE_MAP_COORD_SETBIND_CMD;
+   i830->state.Ctx[I830_CTXREG_MCSB1] = (TEXBIND_SET3(TEXCOORDSRC_VTXSET_3) |
+					 TEXBIND_SET2(TEXCOORDSRC_VTXSET_2) |
+					 TEXBIND_SET1(TEXCOORDSRC_VTXSET_1) |
+					 TEXBIND_SET0(TEXCOORDSRC_VTXSET_0));
+					 
+
+   i830->state.Stipple[I830_STPREG_ST0] = _3DSTATE_STIPPLE;
+
+   i830->state.Buffer[I830_DESTREG_CBUFADDR0] = _3DSTATE_BUF_INFO_CMD;
+   i830->state.Buffer[I830_DESTREG_CBUFADDR1] = 
+      (BUF_3D_ID_COLOR_BACK | 
+       BUF_3D_PITCH(screen->frontPitch * screen->cpp) |
+       BUF_3D_USE_FENCE);
+
+
+   i830->state.Buffer[I830_DESTREG_DBUFADDR0] = _3DSTATE_BUF_INFO_CMD;
+   i830->state.Buffer[I830_DESTREG_DBUFADDR1] = 
+      (BUF_3D_ID_DEPTH |
+       BUF_3D_PITCH(screen->depthPitch * screen->cpp) |
+       BUF_3D_USE_FENCE);
+   i830->state.Buffer[I830_DESTREG_DBUFADDR2] = screen->depthOffset;
+
+
+   i830->state.Buffer[I830_DESTREG_DV0] = _3DSTATE_DST_BUF_VARS_CMD;
+
+   switch (screen->fbFormat) {
+   case DV_PF_555:
+   case DV_PF_565:
+      i830->state.Buffer[I830_DESTREG_DV1] = (DSTORG_HORT_BIAS(0x8) | /* .5 */
+					      DSTORG_VERT_BIAS(0x8) | /* .5 */
+					      screen->fbFormat |
+					      DEPTH_IS_Z |
+					      DEPTH_FRMT_16_FIXED);
+      break;
+   case DV_PF_8888:
+      i830->state.Buffer[I830_DESTREG_DV1] = (DSTORG_HORT_BIAS(0x8) | /* .5 */
+					      DSTORG_VERT_BIAS(0x8) | /* .5 */
+					      screen->fbFormat |
+					      DEPTH_IS_Z |
+					      DEPTH_FRMT_24_FIXED_8_OTHER);
+      break;
+   }
+
+   i830->state.Buffer[I830_DESTREG_SENABLE] = (_3DSTATE_SCISSOR_ENABLE_CMD |
+					       DISABLE_SCISSOR_RECT);
+   i830->state.Buffer[I830_DESTREG_SR0] = _3DSTATE_SCISSOR_RECT_0_CMD;
+   i830->state.Buffer[I830_DESTREG_SR1] = 0;
+   i830->state.Buffer[I830_DESTREG_SR2] = 0;
+}
+
+
+void i830InitStateFuncs( struct dd_function_table *functions )
+{
+   functions->AlphaFunc = i830AlphaFunc;
+   functions->BlendColor = i830BlendColor;
+   functions->BlendEquationSeparate = i830BlendEquationSeparate;
+   functions->BlendFuncSeparate = i830BlendFuncSeparate;
+   functions->ColorMask = i830ColorMask;
+   functions->CullFace = i830CullFaceFrontFace;
+   functions->DepthFunc = i830DepthFunc;
+   functions->DepthMask = i830DepthMask;
+   functions->Enable = i830Enable;
+   functions->Fogfv = i830Fogfv;
+   functions->FrontFace = i830CullFaceFrontFace;
+   functions->LightModelfv = i830LightModelfv;
+   functions->LineWidth = i830LineWidth;
+   functions->LogicOpcode = i830LogicOp;
+   functions->PointSize = i830PointSize;
+   functions->PolygonStipple = i830PolygonStipple;
+   functions->Scissor = i830Scissor;
+   functions->ShadeModel = i830ShadeModel;
+   functions->StencilFunc = i830StencilFunc;
+   functions->StencilMask = i830StencilMask;
+   functions->StencilOp = i830StencilOp;
+}
+
+void i830InitState( i830ContextPtr i830 )
+{
+   GLcontext *ctx = &i830->intel.ctx;
+
+   i830_init_packets( i830 );
+
+   intelInitState( ctx );
+
+   memcpy( &i830->initial, &i830->state, sizeof(i830->state) );
+
+   i830->current = &i830->state;
+   i830->state.emitted = 0;
+   i830->state.active = (I830_UPLOAD_TEXBLEND(0) |
+			 I830_UPLOAD_STIPPLE |
+			 I830_UPLOAD_CTX |
+			 I830_UPLOAD_BUFFERS);
+}
+
+
+
+
+