xserver and mesa git update 28-12-2010

1 files changed, 1617 insertions, 1616 deletions

diff --git a/mesalib/src/mesa/main/texenvprogram.c b/mesalib/src/mesa/main/texenvprogram.c
index 20f02cefe..aa318f7de 100644
--- a/mesalib/src/mesa/main/texenvprogram.c
+++ b/mesalib/src/mesa/main/texenvprogram.c
@@ -1,1616 +1,1617 @@
-/**************************************************************************
- * 
- * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
- * All Rights Reserved.
- * Copyright 2009 VMware, Inc.  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, 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 TUNGSTEN GRAPHICS AND/OR ITS 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.
- * 
- **************************************************************************/
-
-#include "glheader.h"
-#include "imports.h"
-#include "program/program.h"
-#include "program/prog_parameter.h"
-#include "program/prog_cache.h"
-#include "program/prog_instruction.h"
-#include "program/prog_print.h"
-#include "program/prog_statevars.h"
-#include "program/programopt.h"
-#include "texenvprogram.h"
-
-
-/*
- * Note on texture units:
- *
- * The number of texture units supported by fixed-function fragment
- * processing is MAX_TEXTURE_COORD_UNITS, not MAX_TEXTURE_IMAGE_UNITS.
- * That's because there's a one-to-one correspondence between texture
- * coordinates and samplers in fixed-function processing.
- *
- * Since fixed-function vertex processing is limited to MAX_TEXTURE_COORD_UNITS
- * sets of texcoords, so is fixed-function fragment processing.
- *
- * We can safely use ctx->Const.MaxTextureUnits for loop bounds.
- */
-
-
-struct texenvprog_cache_item
-{
-   GLuint hash;
-   void *key;
-   struct gl_fragment_program *data;
-   struct texenvprog_cache_item *next;
-};
-
-static GLboolean
-texenv_doing_secondary_color(GLcontext *ctx)
-{
-   if (ctx->Light.Enabled &&
-       (ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR))
-      return GL_TRUE;
-
-   if (ctx->Fog.ColorSumEnabled)
-      return GL_TRUE;
-
-   return GL_FALSE;
-}
-
-/**
- * Up to nine instructions per tex unit, plus fog, specular color.
- */
-#define MAX_INSTRUCTIONS ((MAX_TEXTURE_COORD_UNITS * 9) + 12)
-
-#define DISASSEM (MESA_VERBOSE & VERBOSE_DISASSEM)
-
-struct mode_opt {
-#ifdef __GNUC__
-   __extension__ GLubyte Source:4;  /**< SRC_x */
-   __extension__ GLubyte Operand:3; /**< OPR_x */
-#else
-   GLubyte Source;  /**< SRC_x */
-   GLubyte Operand; /**< OPR_x */
-#endif
-};
-
-struct state_key {
-   GLuint nr_enabled_units:8;
-   GLuint enabled_units:8;
-   GLuint separate_specular:1;
-   GLuint fog_enabled:1;
-   GLuint fog_mode:2;          /**< FOG_x */
-   GLuint inputs_available:12;
-   GLuint num_draw_buffers:4;
-
-   /* NOTE: This array of structs must be last! (see "keySize" below) */
-   struct {
-      GLuint enabled:1;
-      GLuint source_index:3;   /**< TEXTURE_x_INDEX */
-      GLuint shadow:1;
-      GLuint ScaleShiftRGB:2;
-      GLuint ScaleShiftA:2;
-
-      GLuint NumArgsRGB:3;  /**< up to MAX_COMBINER_TERMS */
-      GLuint ModeRGB:5;     /**< MODE_x */
-
-      GLuint NumArgsA:3;  /**< up to MAX_COMBINER_TERMS */
-      GLuint ModeA:5;     /**< MODE_x */
-
-      GLuint texture_cyl_wrap:1; /**< For gallium test/debug only */
-
-      struct mode_opt OptRGB[MAX_COMBINER_TERMS];
-      struct mode_opt OptA[MAX_COMBINER_TERMS];
-   } unit[MAX_TEXTURE_UNITS];
-};
-
-#define FOG_LINEAR  0
-#define FOG_EXP     1
-#define FOG_EXP2    2
-#define FOG_UNKNOWN 3
-
-static GLuint translate_fog_mode( GLenum mode )
-{
-   switch (mode) {
-   case GL_LINEAR: return FOG_LINEAR;
-   case GL_EXP: return FOG_EXP;
-   case GL_EXP2: return FOG_EXP2;
-   default: return FOG_UNKNOWN;
-   }
-}
-
-#define OPR_SRC_COLOR           0
-#define OPR_ONE_MINUS_SRC_COLOR 1
-#define OPR_SRC_ALPHA           2
-#define OPR_ONE_MINUS_SRC_ALPHA	3
-#define OPR_ZERO                4
-#define OPR_ONE                 5
-#define OPR_UNKNOWN             7
-
-static GLuint translate_operand( GLenum operand )
-{
-   switch (operand) {
-   case GL_SRC_COLOR: return OPR_SRC_COLOR;
-   case GL_ONE_MINUS_SRC_COLOR: return OPR_ONE_MINUS_SRC_COLOR;
-   case GL_SRC_ALPHA: return OPR_SRC_ALPHA;
-   case GL_ONE_MINUS_SRC_ALPHA: return OPR_ONE_MINUS_SRC_ALPHA;
-   case GL_ZERO: return OPR_ZERO;
-   case GL_ONE: return OPR_ONE;
-   default:
-      assert(0);
-      return OPR_UNKNOWN;
-   }
-}
-
-#define SRC_TEXTURE  0
-#define SRC_TEXTURE0 1
-#define SRC_TEXTURE1 2
-#define SRC_TEXTURE2 3
-#define SRC_TEXTURE3 4
-#define SRC_TEXTURE4 5
-#define SRC_TEXTURE5 6
-#define SRC_TEXTURE6 7
-#define SRC_TEXTURE7 8
-#define SRC_CONSTANT 9
-#define SRC_PRIMARY_COLOR 10
-#define SRC_PREVIOUS 11
-#define SRC_ZERO     12
-#define SRC_UNKNOWN  15
-
-static GLuint translate_source( GLenum src )
-{
-   switch (src) {
-   case GL_TEXTURE: return SRC_TEXTURE;
-   case GL_TEXTURE0:
-   case GL_TEXTURE1:
-   case GL_TEXTURE2:
-   case GL_TEXTURE3:
-   case GL_TEXTURE4:
-   case GL_TEXTURE5:
-   case GL_TEXTURE6:
-   case GL_TEXTURE7: return SRC_TEXTURE0 + (src - GL_TEXTURE0);
-   case GL_CONSTANT: return SRC_CONSTANT;
-   case GL_PRIMARY_COLOR: return SRC_PRIMARY_COLOR;
-   case GL_PREVIOUS: return SRC_PREVIOUS;
-   case GL_ZERO:
-      return SRC_ZERO;
-   default:
-      assert(0);
-      return SRC_UNKNOWN;
-   }
-}
-
-#define MODE_REPLACE                     0  /* r = a0 */
-#define MODE_MODULATE                    1  /* r = a0 * a1 */
-#define MODE_ADD                         2  /* r = a0 + a1 */
-#define MODE_ADD_SIGNED                  3  /* r = a0 + a1 - 0.5 */
-#define MODE_INTERPOLATE                 4  /* r = a0 * a2 + a1 * (1 - a2) */
-#define MODE_SUBTRACT                    5  /* r = a0 - a1 */
-#define MODE_DOT3_RGB                    6  /* r = a0 . a1 */
-#define MODE_DOT3_RGB_EXT                7  /* r = a0 . a1 */
-#define MODE_DOT3_RGBA                   8  /* r = a0 . a1 */
-#define MODE_DOT3_RGBA_EXT               9  /* r = a0 . a1 */
-#define MODE_MODULATE_ADD_ATI           10  /* r = a0 * a2 + a1 */
-#define MODE_MODULATE_SIGNED_ADD_ATI    11  /* r = a0 * a2 + a1 - 0.5 */
-#define MODE_MODULATE_SUBTRACT_ATI      12  /* r = a0 * a2 - a1 */
-#define MODE_ADD_PRODUCTS               13  /* r = a0 * a1 + a2 * a3 */
-#define MODE_ADD_PRODUCTS_SIGNED        14  /* r = a0 * a1 + a2 * a3 - 0.5 */
-#define MODE_BUMP_ENVMAP_ATI            15  /* special */
-#define MODE_UNKNOWN                    16
-
-/**
- * Translate GL combiner state into a MODE_x value
- */
-static GLuint translate_mode( GLenum envMode, GLenum mode )
-{
-   switch (mode) {
-   case GL_REPLACE: return MODE_REPLACE;
-   case GL_MODULATE: return MODE_MODULATE;
-   case GL_ADD:
-      if (envMode == GL_COMBINE4_NV)
-         return MODE_ADD_PRODUCTS;
-      else
-         return MODE_ADD;
-   case GL_ADD_SIGNED:
-      if (envMode == GL_COMBINE4_NV)
-         return MODE_ADD_PRODUCTS_SIGNED;
-      else
-         return MODE_ADD_SIGNED;
-   case GL_INTERPOLATE: return MODE_INTERPOLATE;
-   case GL_SUBTRACT: return MODE_SUBTRACT;
-   case GL_DOT3_RGB: return MODE_DOT3_RGB;
-   case GL_DOT3_RGB_EXT: return MODE_DOT3_RGB_EXT;
-   case GL_DOT3_RGBA: return MODE_DOT3_RGBA;
-   case GL_DOT3_RGBA_EXT: return MODE_DOT3_RGBA_EXT;
-   case GL_MODULATE_ADD_ATI: return MODE_MODULATE_ADD_ATI;
-   case GL_MODULATE_SIGNED_ADD_ATI: return MODE_MODULATE_SIGNED_ADD_ATI;
-   case GL_MODULATE_SUBTRACT_ATI: return MODE_MODULATE_SUBTRACT_ATI;
-   case GL_BUMP_ENVMAP_ATI: return MODE_BUMP_ENVMAP_ATI;
-   default:
-      assert(0);
-      return MODE_UNKNOWN;
-   }
-}
-
-
-/**
- * Do we need to clamp the results of the given texture env/combine mode?
- * If the inputs to the mode are in [0,1] we don't always have to clamp
- * the results.
- */
-static GLboolean
-need_saturate( GLuint mode )
-{
-   switch (mode) {
-   case MODE_REPLACE:
-   case MODE_MODULATE:
-   case MODE_INTERPOLATE:
-      return GL_FALSE;
-   case MODE_ADD:
-   case MODE_ADD_SIGNED:
-   case MODE_SUBTRACT:
-   case MODE_DOT3_RGB:
-   case MODE_DOT3_RGB_EXT:
-   case MODE_DOT3_RGBA:
-   case MODE_DOT3_RGBA_EXT:
-   case MODE_MODULATE_ADD_ATI:
-   case MODE_MODULATE_SIGNED_ADD_ATI:
-   case MODE_MODULATE_SUBTRACT_ATI:
-   case MODE_ADD_PRODUCTS:
-   case MODE_ADD_PRODUCTS_SIGNED:
-   case MODE_BUMP_ENVMAP_ATI:
-      return GL_TRUE;
-   default:
-      assert(0);
-      return GL_FALSE;
-   }
-}
-
-
-
-/**
- * Translate TEXTURE_x_BIT to TEXTURE_x_INDEX.
- */
-static GLuint translate_tex_src_bit( GLbitfield bit )
-{
-   ASSERT(bit);
-   return _mesa_ffs(bit) - 1;
-}
-
-
-#define VERT_BIT_TEX_ANY    (0xff << VERT_ATTRIB_TEX0)
-#define VERT_RESULT_TEX_ANY (0xff << VERT_RESULT_TEX0)
-
-/**
- * Identify all possible varying inputs.  The fragment program will
- * never reference non-varying inputs, but will track them via state
- * constants instead.
- *
- * This function figures out all the inputs that the fragment program
- * has access to.  The bitmask is later reduced to just those which
- * are actually referenced.
- */
-static GLbitfield get_fp_input_mask( GLcontext *ctx )
-{
-   /* _NEW_PROGRAM */
-   const GLboolean vertexShader = (ctx->Shader.CurrentProgram &&
-				   ctx->Shader.CurrentProgram->LinkStatus &&
-                                   ctx->Shader.CurrentProgram->VertexProgram);
-   const GLboolean vertexProgram = ctx->VertexProgram._Enabled;
-   GLbitfield fp_inputs = 0x0;
-
-   if (ctx->VertexProgram._Overriden) {
-      /* Somebody's messing with the vertex program and we don't have
-       * a clue what's happening.  Assume that it could be producing
-       * all possible outputs.
-       */
-      fp_inputs = ~0;
-   }
-   else if (ctx->RenderMode == GL_FEEDBACK) {
-      /* _NEW_RENDERMODE */
-      fp_inputs = (FRAG_BIT_COL0 | FRAG_BIT_TEX0);
-   }
-   else if (!(vertexProgram || vertexShader) ||
-            !ctx->VertexProgram._Current) {
-      /* Fixed function vertex logic */
-      /* _NEW_ARRAY */
-      GLbitfield varying_inputs = ctx->varying_vp_inputs;
-
-      /* These get generated in the setup routine regardless of the
-       * vertex program:
-       */
-      /* _NEW_POINT */
-      if (ctx->Point.PointSprite)
-         varying_inputs |= FRAG_BITS_TEX_ANY;
-
-      /* First look at what values may be computed by the generated
-       * vertex program:
-       */
-      /* _NEW_LIGHT */
-      if (ctx->Light.Enabled) {
-         fp_inputs |= FRAG_BIT_COL0;
-
-         if (texenv_doing_secondary_color(ctx))
-            fp_inputs |= FRAG_BIT_COL1;
-      }
-
-      /* _NEW_TEXTURE */
-      fp_inputs |= (ctx->Texture._TexGenEnabled |
-                    ctx->Texture._TexMatEnabled) << FRAG_ATTRIB_TEX0;
-
-      /* Then look at what might be varying as a result of enabled
-       * arrays, etc:
-       */
-      if (varying_inputs & VERT_BIT_COLOR0)
-         fp_inputs |= FRAG_BIT_COL0;
-      if (varying_inputs & VERT_BIT_COLOR1)
-         fp_inputs |= FRAG_BIT_COL1;
-
-      fp_inputs |= (((varying_inputs & VERT_BIT_TEX_ANY) >> VERT_ATTRIB_TEX0) 
-                    << FRAG_ATTRIB_TEX0);
-
-   }
-   else {
-      /* calculate from vp->outputs */
-      struct gl_vertex_program *vprog;
-      GLbitfield64 vp_outputs;
-
-      /* Choose GLSL vertex shader over ARB vertex program.  Need this
-       * since vertex shader state validation comes after fragment state
-       * validation (see additional comments in state.c).
-       */
-      if (vertexShader)
-         vprog = ctx->Shader.CurrentProgram->VertexProgram;
-      else
-         vprog = ctx->VertexProgram.Current;
-
-      vp_outputs = vprog->Base.OutputsWritten;
-
-      /* These get generated in the setup routine regardless of the
-       * vertex program:
-       */
-      /* _NEW_POINT */
-      if (ctx->Point.PointSprite)
-         vp_outputs |= FRAG_BITS_TEX_ANY;
-
-      if (vp_outputs & (1 << VERT_RESULT_COL0))
-         fp_inputs |= FRAG_BIT_COL0;
-      if (vp_outputs & (1 << VERT_RESULT_COL1))
-         fp_inputs |= FRAG_BIT_COL1;
-
-      fp_inputs |= (((vp_outputs & VERT_RESULT_TEX_ANY) >> VERT_RESULT_TEX0) 
-                    << FRAG_ATTRIB_TEX0);
-   }
-   
-   return fp_inputs;
-}
-
-
-/**
- * Examine current texture environment state and generate a unique
- * key to identify it.
- */
-static GLuint make_state_key( GLcontext *ctx,  struct state_key *key )
-{
-   GLuint i, j;
-   GLbitfield inputs_referenced = FRAG_BIT_COL0;
-   const GLbitfield inputs_available = get_fp_input_mask( ctx );
-   GLuint keySize;
-
-   memset(key, 0, sizeof(*key));
-
-   /* _NEW_TEXTURE */
-   for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
-      const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
-      const struct gl_texture_object *texObj = texUnit->_Current;
-      const struct gl_tex_env_combine_state *comb = texUnit->_CurrentCombine;
-      GLenum format;
-
-      if (!texUnit->_ReallyEnabled || !texUnit->Enabled)
-         continue;
-
-      format = texObj->Image[0][texObj->BaseLevel]->_BaseFormat;
-
-      key->unit[i].enabled = 1;
-      key->enabled_units |= (1<<i);
-      key->nr_enabled_units = i + 1;
-      inputs_referenced |= FRAG_BIT_TEX(i);
-
-      key->unit[i].source_index =
-         translate_tex_src_bit(texUnit->_ReallyEnabled);
-
-      key->unit[i].shadow = ((texObj->CompareMode == GL_COMPARE_R_TO_TEXTURE) &&
-                             ((format == GL_DEPTH_COMPONENT) || 
-                              (format == GL_DEPTH_STENCIL_EXT)));
-
-      key->unit[i].NumArgsRGB = comb->_NumArgsRGB;
-      key->unit[i].NumArgsA = comb->_NumArgsA;
-
-      key->unit[i].ModeRGB =
-	 translate_mode(texUnit->EnvMode, comb->ModeRGB);
-      key->unit[i].ModeA =
-	 translate_mode(texUnit->EnvMode, comb->ModeA);
-
-      key->unit[i].ScaleShiftRGB = comb->ScaleShiftRGB;
-      key->unit[i].ScaleShiftA = comb->ScaleShiftA;
-
-      for (j = 0; j < MAX_COMBINER_TERMS; j++) {
-         key->unit[i].OptRGB[j].Operand = translate_operand(comb->OperandRGB[j]);
-         key->unit[i].OptA[j].Operand = translate_operand(comb->OperandA[j]);
-         key->unit[i].OptRGB[j].Source = translate_source(comb->SourceRGB[j]);
-         key->unit[i].OptA[j].Source = translate_source(comb->SourceA[j]);
-      }
-
-      if (key->unit[i].ModeRGB == MODE_BUMP_ENVMAP_ATI) {
-         /* requires some special translation */
-         key->unit[i].NumArgsRGB = 2;
-         key->unit[i].ScaleShiftRGB = 0;
-         key->unit[i].OptRGB[0].Operand = OPR_SRC_COLOR;
-         key->unit[i].OptRGB[0].Source = SRC_TEXTURE;
-         key->unit[i].OptRGB[1].Operand = OPR_SRC_COLOR;
-         key->unit[i].OptRGB[1].Source = texUnit->BumpTarget - GL_TEXTURE0 + SRC_TEXTURE0;
-       }
-
-      /* this is a back-door for enabling cylindrical texture wrap mode */
-      if (texObj->Priority == 0.125)
-         key->unit[i].texture_cyl_wrap = 1;
-   }
-
-   /* _NEW_LIGHT | _NEW_FOG */
-   if (texenv_doing_secondary_color(ctx)) {
-      key->separate_specular = 1;
-      inputs_referenced |= FRAG_BIT_COL1;
-   }
-
-   /* _NEW_FOG */
-   if (ctx->Fog.Enabled) {
-      key->fog_enabled = 1;
-      key->fog_mode = translate_fog_mode(ctx->Fog.Mode);
-      inputs_referenced |= FRAG_BIT_FOGC; /* maybe */
-   }
-
-   /* _NEW_BUFFERS */
-   key->num_draw_buffers = ctx->DrawBuffer->_NumColorDrawBuffers;
-
-   key->inputs_available = (inputs_available & inputs_referenced);
-
-   /* compute size of state key, ignoring unused texture units */
-   keySize = sizeof(*key) - sizeof(key->unit)
-      + key->nr_enabled_units * sizeof(key->unit[0]);
-
-   return keySize;
-}
-
-
-/**
- * Use uregs to represent registers internally, translate to Mesa's
- * expected formats on emit.  
- *
- * NOTE: These are passed by value extensively in this file rather
- * than as usual by pointer reference.  If this disturbs you, try
- * remembering they are just 32bits in size.
- *
- * GCC is smart enough to deal with these dword-sized structures in
- * much the same way as if I had defined them as dwords and was using
- * macros to access and set the fields.  This is much nicer and easier
- * to evolve.
- */
-struct ureg {
-   GLuint file:4;
-   GLuint idx:8;
-   GLuint negatebase:1;
-   GLuint swz:12;
-   GLuint pad:7;
-};
-
-static const struct ureg undef = { 
-   PROGRAM_UNDEFINED,
-   ~0,
-   0,
-   0,
-   0
-};
-
-
-/** State used to build the fragment program:
- */
-struct texenv_fragment_program {
-   struct gl_fragment_program *program;
-   struct state_key *state;
-
-   GLbitfield alu_temps;	/**< Track texture indirections, see spec. */
-   GLbitfield temps_output;	/**< Track texture indirections, see spec. */
-   GLbitfield temp_in_use;	/**< Tracks temporary regs which are in use. */
-   GLboolean error;
-
-   struct ureg src_texture[MAX_TEXTURE_COORD_UNITS];   
-   /* Reg containing each texture unit's sampled texture color,
-    * else undef.
-    */
-
-   struct ureg texcoord_tex[MAX_TEXTURE_COORD_UNITS];
-   /* Reg containing texcoord for a texture unit,
-    * needed for bump mapping, else undef.
-    */
-
-   struct ureg src_previous;	/**< Reg containing color from previous 
-				 * stage.  May need to be decl'd.
-				 */
-
-   GLuint last_tex_stage;	/**< Number of last enabled texture unit */
-
-   struct ureg half;
-   struct ureg one;
-   struct ureg zero;
-};
-
-
-
-static struct ureg make_ureg(GLuint file, GLuint idx)
-{
-   struct ureg reg;
-   reg.file = file;
-   reg.idx = idx;
-   reg.negatebase = 0;
-   reg.swz = SWIZZLE_NOOP;
-   reg.pad = 0;
-   return reg;
-}
-
-static struct ureg swizzle( struct ureg reg, int x, int y, int z, int w )
-{
-   reg.swz = MAKE_SWIZZLE4(GET_SWZ(reg.swz, x),
-			   GET_SWZ(reg.swz, y),
-			   GET_SWZ(reg.swz, z),
-			   GET_SWZ(reg.swz, w));
-
-   return reg;
-}
-
-static struct ureg swizzle1( struct ureg reg, int x )
-{
-   return swizzle(reg, x, x, x, x);
-}
-
-static struct ureg negate( struct ureg reg )
-{
-   reg.negatebase ^= 1;
-   return reg;
-}
-
-static GLboolean is_undef( struct ureg reg )
-{
-   return reg.file == PROGRAM_UNDEFINED;
-}
-
-
-static struct ureg get_temp( struct texenv_fragment_program *p )
-{
-   GLint bit;
-   
-   /* First try and reuse temps which have been used already:
-    */
-   bit = _mesa_ffs( ~p->temp_in_use & p->alu_temps );
-
-   /* Then any unused temporary:
-    */
-   if (!bit)
-      bit = _mesa_ffs( ~p->temp_in_use );
-
-   if (!bit) {
-      _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__);
-      exit(1);
-   }
-
-   if ((GLuint) bit > p->program->Base.NumTemporaries)
-      p->program->Base.NumTemporaries = bit;
-
-   p->temp_in_use |= 1<<(bit-1);
-   return make_ureg(PROGRAM_TEMPORARY, (bit-1));
-}
-
-static struct ureg get_tex_temp( struct texenv_fragment_program *p )
-{
-   int bit;
-   
-   /* First try to find available temp not previously used (to avoid
-    * starting a new texture indirection).  According to the spec, the
-    * ~p->temps_output isn't necessary, but will keep it there for
-    * now:
-    */
-   bit = _mesa_ffs( ~p->temp_in_use & ~p->alu_temps & ~p->temps_output );
-
-   /* Then any unused temporary:
-    */
-   if (!bit) 
-      bit = _mesa_ffs( ~p->temp_in_use );
-
-   if (!bit) {
-      _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__);
-      exit(1);
-   }
-
-   if ((GLuint) bit > p->program->Base.NumTemporaries)
-      p->program->Base.NumTemporaries = bit;
-
-   p->temp_in_use |= 1<<(bit-1);
-   return make_ureg(PROGRAM_TEMPORARY, (bit-1));
-}
-
-
-/** Mark a temp reg as being no longer allocatable. */
-static void reserve_temp( struct texenv_fragment_program *p, struct ureg r )
-{
-   if (r.file == PROGRAM_TEMPORARY)
-      p->temps_output |= (1 << r.idx);
-}
-
-
-static void release_temps(GLcontext *ctx, struct texenv_fragment_program *p )
-{
-   GLuint max_temp = ctx->Const.FragmentProgram.MaxTemps;
-
-   /* KW: To support tex_env_crossbar, don't release the registers in
-    * temps_output.
-    */
-   if (max_temp >= sizeof(int) * 8)
-      p->temp_in_use = p->temps_output;
-   else
-      p->temp_in_use = ~((1<<max_temp)-1) | p->temps_output;
-}
-
-
-static struct ureg register_param5( struct texenv_fragment_program *p, 
-				    GLint s0,
-				    GLint s1,
-				    GLint s2,
-				    GLint s3,
-				    GLint s4)
-{
-   gl_state_index tokens[STATE_LENGTH];
-   GLuint idx;
-   tokens[0] = s0;
-   tokens[1] = s1;
-   tokens[2] = s2;
-   tokens[3] = s3;
-   tokens[4] = s4;
-   idx = _mesa_add_state_reference( p->program->Base.Parameters, tokens );
-   return make_ureg(PROGRAM_STATE_VAR, idx);
-}
-
-
-#define register_param1(p,s0)          register_param5(p,s0,0,0,0,0)
-#define register_param2(p,s0,s1)       register_param5(p,s0,s1,0,0,0)
-#define register_param3(p,s0,s1,s2)    register_param5(p,s0,s1,s2,0,0)
-#define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0)
-
-static GLuint frag_to_vert_attrib( GLuint attrib )
-{
-   switch (attrib) {
-   case FRAG_ATTRIB_COL0: return VERT_ATTRIB_COLOR0;
-   case FRAG_ATTRIB_COL1: return VERT_ATTRIB_COLOR1;
-   default:
-      assert(attrib >= FRAG_ATTRIB_TEX0);
-      assert(attrib <= FRAG_ATTRIB_TEX7);
-      return attrib - FRAG_ATTRIB_TEX0 + VERT_ATTRIB_TEX0;
-   }
-}
-
-
-static struct ureg register_input( struct texenv_fragment_program *p, GLuint input )
-{
-   if (p->state->inputs_available & (1<<input)) {
-      p->program->Base.InputsRead |= (1 << input);
-      return make_ureg(PROGRAM_INPUT, input);
-   }
-   else {
-      GLuint idx = frag_to_vert_attrib( input );
-      return register_param3( p, STATE_INTERNAL, STATE_CURRENT_ATTRIB, idx );
-   }
-}
-
-
-static void emit_arg( struct prog_src_register *reg,
-		      struct ureg ureg )
-{
-   reg->File = ureg.file;
-   reg->Index = ureg.idx;
-   reg->Swizzle = ureg.swz;
-   reg->Negate = ureg.negatebase ? NEGATE_XYZW : NEGATE_NONE;
-   reg->Abs = GL_FALSE;
-}
-
-static void emit_dst( struct prog_dst_register *dst,
-		      struct ureg ureg, GLuint mask )
-{
-   dst->File = ureg.file;
-   dst->Index = ureg.idx;
-   dst->WriteMask = mask;
-   dst->CondMask = COND_TR;  /* always pass cond test */
-   dst->CondSwizzle = SWIZZLE_NOOP;
-}
-
-static struct prog_instruction *
-emit_op(struct texenv_fragment_program *p,
-	enum prog_opcode op,
-	struct ureg dest,
-	GLuint mask,
-	GLboolean saturate,
-	struct ureg src0,
-	struct ureg src1,
-	struct ureg src2 )
-{
-   const GLuint nr = p->program->Base.NumInstructions++;
-   struct prog_instruction *inst = &p->program->Base.Instructions[nr];
-
-   assert(nr < MAX_INSTRUCTIONS);
-
-   _mesa_init_instructions(inst, 1);
-   inst->Opcode = op;
-   
-   emit_arg( &inst->SrcReg[0], src0 );
-   emit_arg( &inst->SrcReg[1], src1 );
-   emit_arg( &inst->SrcReg[2], src2 );
-   
-   inst->SaturateMode = saturate ? SATURATE_ZERO_ONE : SATURATE_OFF;
-
-   emit_dst( &inst->DstReg, dest, mask );
-
-#if 0
-   /* Accounting for indirection tracking:
-    */
-   if (dest.file == PROGRAM_TEMPORARY)
-      p->temps_output |= 1 << dest.idx;
-#endif
-
-   return inst;
-}
-   
-
-static struct ureg emit_arith( struct texenv_fragment_program *p,
-			       enum prog_opcode op,
-			       struct ureg dest,
-			       GLuint mask,
-			       GLboolean saturate,
-			       struct ureg src0,
-			       struct ureg src1,
-			       struct ureg src2 )
-{
-   emit_op(p, op, dest, mask, saturate, src0, src1, src2);
-   
-   /* Accounting for indirection tracking:
-    */
-   if (src0.file == PROGRAM_TEMPORARY)
-      p->alu_temps |= 1 << src0.idx;
-
-   if (!is_undef(src1) && src1.file == PROGRAM_TEMPORARY)
-      p->alu_temps |= 1 << src1.idx;
-
-   if (!is_undef(src2) && src2.file == PROGRAM_TEMPORARY)
-      p->alu_temps |= 1 << src2.idx;
-
-   if (dest.file == PROGRAM_TEMPORARY)
-      p->alu_temps |= 1 << dest.idx;
-       
-   p->program->Base.NumAluInstructions++;
-   return dest;
-}
-
-static struct ureg emit_texld( struct texenv_fragment_program *p,
-			       enum prog_opcode op,
-			       struct ureg dest,
-			       GLuint destmask,
-			       GLuint tex_unit,
-			       GLuint tex_idx,
-                               GLuint tex_shadow,
-			       struct ureg coord )
-{
-   struct prog_instruction *inst = emit_op( p, op, 
-					  dest, destmask, 
-					  GL_FALSE,	/* don't saturate? */
-					  coord, 	/* arg 0? */
-					  undef,
-					  undef);
-   
-   inst->TexSrcTarget = tex_idx;
-   inst->TexSrcUnit = tex_unit;
-   inst->TexShadow = tex_shadow;
-
-   p->program->Base.NumTexInstructions++;
-
-   /* Accounting for indirection tracking:
-    */
-   reserve_temp(p, dest);
-
-#if 0
-   /* Is this a texture indirection?
-    */
-   if ((coord.file == PROGRAM_TEMPORARY &&
-	(p->temps_output & (1<<coord.idx))) ||
-       (dest.file == PROGRAM_TEMPORARY &&
-	(p->alu_temps & (1<<dest.idx)))) {
-      p->program->Base.NumTexIndirections++;
-      p->temps_output = 1<<coord.idx;
-      p->alu_temps = 0;
-      assert(0);		/* KW: texture env crossbar */
-   }
-#endif
-
-   return dest;
-}
-
-
-static struct ureg register_const4f( struct texenv_fragment_program *p, 
-				     GLfloat s0,
-				     GLfloat s1,
-				     GLfloat s2,
-				     GLfloat s3)
-{
-   GLfloat values[4];
-   GLuint idx, swizzle;
-   struct ureg r;
-   values[0] = s0;
-   values[1] = s1;
-   values[2] = s2;
-   values[3] = s3;
-   idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4,
-                                     &swizzle );
-   r = make_ureg(PROGRAM_CONSTANT, idx);
-   r.swz = swizzle;
-   return r;
-}
-
-#define register_scalar_const(p, s0)    register_const4f(p, s0, s0, s0, s0)
-#define register_const1f(p, s0)         register_const4f(p, s0, 0, 0, 1)
-#define register_const2f(p, s0, s1)     register_const4f(p, s0, s1, 0, 1)
-#define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1)
-
-
-static struct ureg get_one( struct texenv_fragment_program *p )
-{
-   if (is_undef(p->one)) 
-      p->one = register_scalar_const(p, 1.0);
-   return p->one;
-}
-
-static struct ureg get_half( struct texenv_fragment_program *p )
-{
-   if (is_undef(p->half)) 
-      p->half = register_scalar_const(p, 0.5);
-   return p->half;
-}
-
-static struct ureg get_zero( struct texenv_fragment_program *p )
-{
-   if (is_undef(p->zero)) 
-      p->zero = register_scalar_const(p, 0.0);
-   return p->zero;
-}
-
-
-static void program_error( struct texenv_fragment_program *p, const char *msg )
-{
-   _mesa_problem(NULL, "%s", msg);
-   p->error = 1;
-}
-
-static struct ureg get_source( struct texenv_fragment_program *p, 
-			       GLuint src, GLuint unit )
-{
-   switch (src) {
-   case SRC_TEXTURE: 
-      assert(!is_undef(p->src_texture[unit]));
-      return p->src_texture[unit];
-
-   case SRC_TEXTURE0:
-   case SRC_TEXTURE1:
-   case SRC_TEXTURE2:
-   case SRC_TEXTURE3:
-   case SRC_TEXTURE4:
-   case SRC_TEXTURE5:
-   case SRC_TEXTURE6:
-   case SRC_TEXTURE7: 
-      assert(!is_undef(p->src_texture[src - SRC_TEXTURE0]));
-      return p->src_texture[src - SRC_TEXTURE0];
-
-   case SRC_CONSTANT:
-      return register_param2(p, STATE_TEXENV_COLOR, unit);
-
-   case SRC_PRIMARY_COLOR:
-      return register_input(p, FRAG_ATTRIB_COL0);
-
-   case SRC_ZERO:
-      return get_zero(p);
-
-   case SRC_PREVIOUS:
-      if (is_undef(p->src_previous))
-	 return register_input(p, FRAG_ATTRIB_COL0);
-      else
-	 return p->src_previous;
-
-   default:
-      assert(0);
-      return undef;
-   }
-}
-
-static struct ureg emit_combine_source( struct texenv_fragment_program *p, 
-					GLuint mask,
-					GLuint unit,
-					GLuint source, 
-					GLuint operand )
-{
-   struct ureg arg, src, one;
-
-   src = get_source(p, source, unit);
-
-   switch (operand) {
-   case OPR_ONE_MINUS_SRC_COLOR: 
-      /* Get unused tmp,
-       * Emit tmp = 1.0 - arg.xyzw
-       */
-      arg = get_temp( p );
-      one = get_one( p );
-      return emit_arith( p, OPCODE_SUB, arg, mask, 0, one, src, undef);
-
-   case OPR_SRC_ALPHA: 
-      if (mask == WRITEMASK_W)
-	 return src;
-      else
-	 return swizzle1( src, SWIZZLE_W );
-   case OPR_ONE_MINUS_SRC_ALPHA: 
-      /* Get unused tmp,
-       * Emit tmp = 1.0 - arg.wwww
-       */
-      arg = get_temp(p);
-      one = get_one(p);
-      return emit_arith(p, OPCODE_SUB, arg, mask, 0,
-			one, swizzle1(src, SWIZZLE_W), undef);
-   case OPR_ZERO:
-      return get_zero(p);
-   case OPR_ONE:
-      return get_one(p);
-   case OPR_SRC_COLOR: 
-      return src;
-   default:
-      assert(0);
-      return src;
-   }
-}
-
-/**
- * Check if the RGB and Alpha sources and operands match for the given
- * texture unit's combinder state.  When the RGB and A sources and
- * operands match, we can emit fewer instructions.
- */
-static GLboolean args_match( const struct state_key *key, GLuint unit )
-{
-   GLuint i, numArgs = key->unit[unit].NumArgsRGB;
-
-   for (i = 0; i < numArgs; i++) {
-      if (key->unit[unit].OptA[i].Source != key->unit[unit].OptRGB[i].Source) 
-	 return GL_FALSE;
-
-      switch (key->unit[unit].OptA[i].Operand) {
-      case OPR_SRC_ALPHA: 
-	 switch (key->unit[unit].OptRGB[i].Operand) {
-	 case OPR_SRC_COLOR: 
-	 case OPR_SRC_ALPHA: 
-	    break;
-	 default:
-	    return GL_FALSE;
-	 }
-	 break;
-      case OPR_ONE_MINUS_SRC_ALPHA: 
-	 switch (key->unit[unit].OptRGB[i].Operand) {
-	 case OPR_ONE_MINUS_SRC_COLOR: 
-	 case OPR_ONE_MINUS_SRC_ALPHA: 
-	    break;
-	 default:
-	    return GL_FALSE;
-	 }
-	 break;
-      default: 
-	 return GL_FALSE;	/* impossible */
-      }
-   }
-
-   return GL_TRUE;
-}
-
-static struct ureg emit_combine( struct texenv_fragment_program *p,
-				 struct ureg dest,
-				 GLuint mask,
-				 GLboolean saturate,
-				 GLuint unit,
-				 GLuint nr,
-				 GLuint mode,
-				 const struct mode_opt *opt)
-{
-   struct ureg src[MAX_COMBINER_TERMS];
-   struct ureg tmp, half;
-   GLuint i;
-
-   assert(nr <= MAX_COMBINER_TERMS);
-
-   for (i = 0; i < nr; i++)
-      src[i] = emit_combine_source( p, mask, unit, opt[i].Source, opt[i].Operand );
-
-   switch (mode) {
-   case MODE_REPLACE: 
-      if (mask == WRITEMASK_XYZW && !saturate)
-	 return src[0];
-      else
-	 return emit_arith( p, OPCODE_MOV, dest, mask, saturate, src[0], undef, undef );
-   case MODE_MODULATE: 
-      return emit_arith( p, OPCODE_MUL, dest, mask, saturate,
-			 src[0], src[1], undef );
-   case MODE_ADD: 
-      return emit_arith( p, OPCODE_ADD, dest, mask, saturate, 
-			 src[0], src[1], undef );
-   case MODE_ADD_SIGNED:
-      /* tmp = arg0 + arg1
-       * result = tmp - .5
-       */
-      half = get_half(p);
-      tmp = get_temp( p );
-      emit_arith( p, OPCODE_ADD, tmp, mask, 0, src[0], src[1], undef );
-      emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp, half, undef );
-      return dest;
-   case MODE_INTERPOLATE: 
-      /* Arg0 * (Arg2) + Arg1 * (1-Arg2) -- note arguments are reordered:
-       */
-      return emit_arith( p, OPCODE_LRP, dest, mask, saturate, src[2], src[0], src[1] );
-
-   case MODE_SUBTRACT: 
-      return emit_arith( p, OPCODE_SUB, dest, mask, saturate, src[0], src[1], undef );
-
-   case MODE_DOT3_RGBA:
-   case MODE_DOT3_RGBA_EXT: 
-   case MODE_DOT3_RGB_EXT:
-   case MODE_DOT3_RGB: {
-      struct ureg tmp0 = get_temp( p );
-      struct ureg tmp1 = get_temp( p );
-      struct ureg neg1 = register_scalar_const(p, -1);
-      struct ureg two  = register_scalar_const(p, 2);
-
-      /* tmp0 = 2*src0 - 1
-       * tmp1 = 2*src1 - 1
-       *
-       * dst = tmp0 dot3 tmp1 
-       */
-      emit_arith( p, OPCODE_MAD, tmp0, WRITEMASK_XYZW, 0, 
-		  two, src[0], neg1);
-
-      if (memcmp(&src[0], &src[1], sizeof(struct ureg)) == 0)
-	 tmp1 = tmp0;
-      else
-	 emit_arith( p, OPCODE_MAD, tmp1, WRITEMASK_XYZW, 0, 
-		     two, src[1], neg1);
-      emit_arith( p, OPCODE_DP3, dest, mask, saturate, tmp0, tmp1, undef);
-      return dest;
-   }
-   case MODE_MODULATE_ADD_ATI:
-      /* Arg0 * Arg2 + Arg1 */
-      return emit_arith( p, OPCODE_MAD, dest, mask, saturate,
-			 src[0], src[2], src[1] );
-   case MODE_MODULATE_SIGNED_ADD_ATI: {
-      /* Arg0 * Arg2 + Arg1 - 0.5 */
-      struct ureg tmp0 = get_temp(p);
-      half = get_half(p);
-      emit_arith( p, OPCODE_MAD, tmp0, mask, 0, src[0], src[2], src[1] );
-      emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp0, half, undef );
-      return dest;
-   }
-   case MODE_MODULATE_SUBTRACT_ATI:
-      /* Arg0 * Arg2 - Arg1 */
-      emit_arith( p, OPCODE_MAD, dest, mask, 0, src[0], src[2], negate(src[1]) );
-      return dest;
-   case MODE_ADD_PRODUCTS:
-      /* Arg0 * Arg1 + Arg2 * Arg3 */
-      {
-         struct ureg tmp0 = get_temp(p);
-         emit_arith( p, OPCODE_MUL, tmp0, mask, 0, src[0], src[1], undef );
-         emit_arith( p, OPCODE_MAD, dest, mask, saturate, src[2], src[3], tmp0 );
-      }
-      return dest;
-   case MODE_ADD_PRODUCTS_SIGNED:
-      /* Arg0 * Arg1 + Arg2 * Arg3 - 0.5 */
-      {
-         struct ureg tmp0 = get_temp(p);
-         half = get_half(p);
-         emit_arith( p, OPCODE_MUL, tmp0, mask, 0, src[0], src[1], undef );
-         emit_arith( p, OPCODE_MAD, tmp0, mask, 0, src[2], src[3], tmp0 );
-         emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp0, half, undef );
-      }
-      return dest;
-   case MODE_BUMP_ENVMAP_ATI:
-      /* special - not handled here */
-      assert(0);
-      return src[0];
-   default: 
-      assert(0);
-      return src[0];
-   }
-}
-
-
-/**
- * Generate instructions for one texture unit's env/combiner mode.
- */
-static struct ureg
-emit_texenv(struct texenv_fragment_program *p, GLuint unit)
-{
-   const struct state_key *key = p->state;
-   GLboolean rgb_saturate, alpha_saturate;
-   GLuint rgb_shift, alpha_shift;
-   struct ureg out, dest;
-
-   if (!key->unit[unit].enabled) {
-      return get_source(p, SRC_PREVIOUS, 0);
-   }
-   if (key->unit[unit].ModeRGB == MODE_BUMP_ENVMAP_ATI) {
-      /* this isn't really a env stage delivering a color and handled elsewhere */
-      return get_source(p, SRC_PREVIOUS, 0);
-   }
-   
-   switch (key->unit[unit].ModeRGB) {
-   case MODE_DOT3_RGB_EXT:
-      alpha_shift = key->unit[unit].ScaleShiftA;
-      rgb_shift = 0;
-      break;
-   case MODE_DOT3_RGBA_EXT:
-      alpha_shift = 0;
-      rgb_shift = 0;
-      break;
-   default:
-      rgb_shift = key->unit[unit].ScaleShiftRGB;
-      alpha_shift = key->unit[unit].ScaleShiftA;
-      break;
-   }
-   
-   /* If we'll do rgb/alpha shifting don't saturate in emit_combine().
-    * We don't want to clamp twice.
-    */
-   if (rgb_shift)
-      rgb_saturate = GL_FALSE;  /* saturate after rgb shift */
-   else if (need_saturate(key->unit[unit].ModeRGB))
-      rgb_saturate = GL_TRUE;
-   else
-      rgb_saturate = GL_FALSE;
-
-   if (alpha_shift)
-      alpha_saturate = GL_FALSE;  /* saturate after alpha shift */
-   else if (need_saturate(key->unit[unit].ModeA))
-      alpha_saturate = GL_TRUE;
-   else
-      alpha_saturate = GL_FALSE;
-
-   /* If this is the very last calculation (and various other conditions
-    * are met), emit directly to the color output register.  Otherwise,
-    * emit to a temporary register.
-    */
-   if (key->separate_specular ||
-       unit != p->last_tex_stage ||
-       alpha_shift ||
-       key->num_draw_buffers != 1 ||
-       rgb_shift)
-      dest = get_temp( p );
-   else
-      dest = make_ureg(PROGRAM_OUTPUT, FRAG_RESULT_COLOR);
-
-   /* Emit the RGB and A combine ops
-    */
-   if (key->unit[unit].ModeRGB == key->unit[unit].ModeA &&
-       args_match(key, unit)) {
-      out = emit_combine( p, dest, WRITEMASK_XYZW, rgb_saturate,
-			  unit,
-			  key->unit[unit].NumArgsRGB,
-			  key->unit[unit].ModeRGB,
-			  key->unit[unit].OptRGB);
-   }
-   else if (key->unit[unit].ModeRGB == MODE_DOT3_RGBA_EXT ||
-	    key->unit[unit].ModeRGB == MODE_DOT3_RGBA) {
-      out = emit_combine( p, dest, WRITEMASK_XYZW, rgb_saturate,
-			  unit,
-			  key->unit[unit].NumArgsRGB,
-			  key->unit[unit].ModeRGB,
-			  key->unit[unit].OptRGB);
-   }
-   else {
-      /* Need to do something to stop from re-emitting identical
-       * argument calculations here:
-       */
-      out = emit_combine( p, dest, WRITEMASK_XYZ, rgb_saturate,
-			  unit,
-			  key->unit[unit].NumArgsRGB,
-			  key->unit[unit].ModeRGB,
-			  key->unit[unit].OptRGB);
-      out = emit_combine( p, dest, WRITEMASK_W, alpha_saturate,
-			  unit,
-			  key->unit[unit].NumArgsA,
-			  key->unit[unit].ModeA,
-			  key->unit[unit].OptA);
-   }
-
-   /* Deal with the final shift:
-    */
-   if (alpha_shift || rgb_shift) {
-      struct ureg shift;
-      GLboolean saturate = GL_TRUE;  /* always saturate at this point */
-
-      if (rgb_shift == alpha_shift) {
-	 shift = register_scalar_const(p, (GLfloat)(1<<rgb_shift));
-      }
-      else {
-	 shift = register_const4f(p, 
-				  (GLfloat)(1<<rgb_shift),
-				  (GLfloat)(1<<rgb_shift),
-				  (GLfloat)(1<<rgb_shift),
-				  (GLfloat)(1<<alpha_shift));
-      }
-      return emit_arith( p, OPCODE_MUL, dest, WRITEMASK_XYZW, 
-			 saturate, out, shift, undef );
-   }
-   else
-      return out;
-}
-
-
-/**
- * Generate instruction for getting a texture source term.
- */
-static void load_texture( struct texenv_fragment_program *p, GLuint unit )
-{
-   if (is_undef(p->src_texture[unit])) {
-      const GLuint texTarget = p->state->unit[unit].source_index;
-      struct ureg texcoord;
-      struct ureg tmp = get_tex_temp( p );
-
-      if (is_undef(p->texcoord_tex[unit])) {
-         texcoord = register_input(p, FRAG_ATTRIB_TEX0+unit);
-      }
-      else {
-         /* might want to reuse this reg for tex output actually */
-         texcoord = p->texcoord_tex[unit];
-      }
-
-      /* TODO: Use D0_MASK_XY where possible.
-       */
-      if (p->state->unit[unit].enabled) {
-         GLboolean shadow = GL_FALSE;
-
-	 if (p->state->unit[unit].shadow) {
-	    p->program->Base.ShadowSamplers |= 1 << unit;
-            shadow = GL_TRUE;
-         }
-
-	 p->src_texture[unit] = emit_texld( p, OPCODE_TXP,
-					    tmp, WRITEMASK_XYZW, 
-					    unit, texTarget, shadow,
-                                            texcoord );
-
-         p->program->Base.SamplersUsed |= (1 << unit);
-         /* This identity mapping should already be in place
-          * (see _mesa_init_program_struct()) but let's be safe.
-          */
-         p->program->Base.SamplerUnits[unit] = unit;
-      }
-      else
-	 p->src_texture[unit] = get_zero(p);
-
-      if (p->state->unit[unit].texture_cyl_wrap) {
-         /* set flag which is checked by Mesa->Gallium program translation */
-         p->program->Base.InputFlags[0] |= PROG_PARAM_BIT_CYL_WRAP;
-      }
-
-   }
-}
-
-static GLboolean load_texenv_source( struct texenv_fragment_program *p, 
-				     GLuint src, GLuint unit )
-{
-   switch (src) {
-   case SRC_TEXTURE:
-      load_texture(p, unit);
-      break;
-
-   case SRC_TEXTURE0:
-   case SRC_TEXTURE1:
-   case SRC_TEXTURE2:
-   case SRC_TEXTURE3:
-   case SRC_TEXTURE4:
-   case SRC_TEXTURE5:
-   case SRC_TEXTURE6:
-   case SRC_TEXTURE7:       
-      load_texture(p, src - SRC_TEXTURE0);
-      break;
-      
-   default:
-      /* not a texture src - do nothing */
-      break;
-   }
- 
-   return GL_TRUE;
-}
-
-
-/**
- * Generate instructions for loading all texture source terms.
- */
-static GLboolean
-load_texunit_sources( struct texenv_fragment_program *p, GLuint unit )
-{
-   const struct state_key *key = p->state;
-   GLuint i;
-
-   for (i = 0; i < key->unit[unit].NumArgsRGB; i++) {
-      load_texenv_source( p, key->unit[unit].OptRGB[i].Source, unit );
-   }
-
-   for (i = 0; i < key->unit[unit].NumArgsA; i++) {
-      load_texenv_source( p, key->unit[unit].OptA[i].Source, unit );
-   }
-
-   return GL_TRUE;
-}
-
-/**
- * Generate instructions for loading bump map textures.
- */
-static GLboolean
-load_texunit_bumpmap( struct texenv_fragment_program *p, GLuint unit )
-{
-   const struct state_key *key = p->state;
-   GLuint bumpedUnitNr = key->unit[unit].OptRGB[1].Source - SRC_TEXTURE0;
-   struct ureg texcDst, bumpMapRes;
-   struct ureg constdudvcolor = register_const4f(p, 0.0, 0.0, 0.0, 1.0);
-   struct ureg texcSrc = register_input(p, FRAG_ATTRIB_TEX0 + bumpedUnitNr);
-   struct ureg rotMat0 = register_param3( p, STATE_INTERNAL, STATE_ROT_MATRIX_0, unit );
-   struct ureg rotMat1 = register_param3( p, STATE_INTERNAL, STATE_ROT_MATRIX_1, unit );
-
-   load_texenv_source( p, unit + SRC_TEXTURE0, unit );
-
-   bumpMapRes = get_source(p, key->unit[unit].OptRGB[0].Source, unit);
-   texcDst = get_tex_temp( p );
-   p->texcoord_tex[bumpedUnitNr] = texcDst;
-
-   /* Apply rot matrix and add coords to be available in next phase.
-    * dest = (Arg0.xxxx * rotMat0 + Arg1) + (Arg0.yyyy * rotMat1)
-    * note only 2 coords are affected the rest are left unchanged (mul by 0)
-    */
-   emit_arith( p, OPCODE_MAD, texcDst, WRITEMASK_XYZW, 0,
-               swizzle1(bumpMapRes, SWIZZLE_X), rotMat0, texcSrc );
-   emit_arith( p, OPCODE_MAD, texcDst, WRITEMASK_XYZW, 0,
-               swizzle1(bumpMapRes, SWIZZLE_Y), rotMat1, texcDst );
-
-   /* Move 0,0,0,1 into bumpmap src if someone (crossbar) is foolish
-    * enough to access this later, should optimize away.
-    */
-   emit_arith( p, OPCODE_MOV, bumpMapRes, WRITEMASK_XYZW, 0,
-               constdudvcolor, undef, undef );
-
-   return GL_TRUE;
-}
-
-/**
- * Generate a new fragment program which implements the context's
- * current texture env/combine mode.
- */
-static void
-create_new_program(GLcontext *ctx, struct state_key *key,
-                   struct gl_fragment_program *program)
-{
-   struct prog_instruction instBuffer[MAX_INSTRUCTIONS];
-   struct texenv_fragment_program p;
-   GLuint unit;
-   struct ureg cf, out;
-   int i;
-
-   memset(&p, 0, sizeof(p));
-   p.state = key;
-   p.program = program;
-
-   /* During code generation, use locally-allocated instruction buffer,
-    * then alloc dynamic storage below.
-    */
-   p.program->Base.Instructions = instBuffer;
-   p.program->Base.Target = GL_FRAGMENT_PROGRAM_ARB;
-   p.program->Base.String = NULL;
-   p.program->Base.NumTexIndirections = 1; /* is this right? */
-   p.program->Base.NumTexInstructions = 0;
-   p.program->Base.NumAluInstructions = 0;
-   p.program->Base.NumInstructions = 0;
-   p.program->Base.NumTemporaries = 0;
-   p.program->Base.NumParameters = 0;
-   p.program->Base.NumAttributes = 0;
-   p.program->Base.NumAddressRegs = 0;
-   p.program->Base.Parameters = _mesa_new_parameter_list();
-   p.program->Base.InputsRead = 0x0;
-
-   if (key->num_draw_buffers == 1)
-      p.program->Base.OutputsWritten = 1 << FRAG_RESULT_COLOR;
-   else {
-      for (i = 0; i < key->num_draw_buffers; i++)
-	 p.program->Base.OutputsWritten |= (1 << (FRAG_RESULT_DATA0 + i));
-   }
-
-   for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
-      p.src_texture[unit] = undef;
-      p.texcoord_tex[unit] = undef;
-   }
-
-   p.src_previous = undef;
-   p.half = undef;
-   p.zero = undef;
-   p.one = undef;
-
-   p.last_tex_stage = 0;
-   release_temps(ctx, &p);
-
-   if (key->enabled_units) {
-      GLboolean needbumpstage = GL_FALSE;
-
-      /* Zeroth pass - bump map textures first */
-      for (unit = 0; unit < key->nr_enabled_units; unit++)
-	 if (key->unit[unit].enabled &&
-             key->unit[unit].ModeRGB == MODE_BUMP_ENVMAP_ATI) {
-	    needbumpstage = GL_TRUE;
-	    load_texunit_bumpmap( &p, unit );
-	 }
-      if (needbumpstage)
-	 p.program->Base.NumTexIndirections++;
-
-      /* First pass - to support texture_env_crossbar, first identify
-       * all referenced texture sources and emit texld instructions
-       * for each:
-       */
-      for (unit = 0; unit < key->nr_enabled_units; unit++)
-	 if (key->unit[unit].enabled) {
-	    load_texunit_sources( &p, unit );
-	    p.last_tex_stage = unit;
-	 }
-
-      /* Second pass - emit combine instructions to build final color:
-       */
-      for (unit = 0; unit < key->nr_enabled_units; unit++)
-	 if (key->unit[unit].enabled) {
-	    p.src_previous = emit_texenv( &p, unit );
-            reserve_temp(&p, p.src_previous); /* don't re-use this temp reg */
-	    release_temps(ctx, &p);	/* release all temps */
-	 }
-   }
-
-   cf = get_source( &p, SRC_PREVIOUS, 0 );
-
-   for (i = 0; i < key->num_draw_buffers; i++) {
-      if (key->num_draw_buffers == 1)
-	 out = make_ureg( PROGRAM_OUTPUT, FRAG_RESULT_COLOR );
-      else {
-	 out = make_ureg( PROGRAM_OUTPUT, FRAG_RESULT_DATA0 + i );
-      }
-
-      if (key->separate_specular) {
-	 /* Emit specular add.
-	  */
-	 struct ureg s = register_input(&p, FRAG_ATTRIB_COL1);
-	 emit_arith( &p, OPCODE_ADD, out, WRITEMASK_XYZ, 0, cf, s, undef );
-	 emit_arith( &p, OPCODE_MOV, out, WRITEMASK_W, 0, cf, undef, undef );
-      }
-      else if (memcmp(&cf, &out, sizeof(cf)) != 0) {
-	 /* Will wind up in here if no texture enabled or a couple of
-	  * other scenarios (GL_REPLACE for instance).
-	  */
-	 emit_arith( &p, OPCODE_MOV, out, WRITEMASK_XYZW, 0, cf, undef, undef );
-      }
-   }
-   /* Finish up:
-    */
-   emit_arith( &p, OPCODE_END, undef, WRITEMASK_XYZW, 0, undef, undef, undef);
-
-   if (key->fog_enabled) {
-      /* Pull fog mode from GLcontext, the value in the state key is
-       * a reduced value and not what is expected in FogOption
-       */
-      p.program->FogOption = ctx->Fog.Mode;
-      p.program->Base.InputsRead |= FRAG_BIT_FOGC;
-   }
-   else {
-      p.program->FogOption = GL_NONE;
-   }
-
-   if (p.program->Base.NumTexIndirections > ctx->Const.FragmentProgram.MaxTexIndirections) 
-      program_error(&p, "Exceeded max nr indirect texture lookups");
-
-   if (p.program->Base.NumTexInstructions > ctx->Const.FragmentProgram.MaxTexInstructions)
-      program_error(&p, "Exceeded max TEX instructions");
-
-   if (p.program->Base.NumAluInstructions > ctx->Const.FragmentProgram.MaxAluInstructions)
-      program_error(&p, "Exceeded max ALU instructions");
-
-   ASSERT(p.program->Base.NumInstructions <= MAX_INSTRUCTIONS);
-
-   /* Allocate final instruction array */
-   p.program->Base.Instructions
-      = _mesa_alloc_instructions(p.program->Base.NumInstructions);
-   if (!p.program->Base.Instructions) {
-      _mesa_error(ctx, GL_OUT_OF_MEMORY,
-                  "generating tex env program");
-      return;
-   }
-   _mesa_copy_instructions(p.program->Base.Instructions, instBuffer,
-                           p.program->Base.NumInstructions);
-
-   if (p.program->FogOption) {
-      _mesa_append_fog_code(ctx, p.program);
-      p.program->FogOption = GL_NONE;
-   }
-
-
-   /* Notify driver the fragment program has (actually) changed.
-    */
-   if (ctx->Driver.ProgramStringNotify) {
-      GLboolean ok = ctx->Driver.ProgramStringNotify(ctx,
-                                                     GL_FRAGMENT_PROGRAM_ARB, 
-                                                     &p.program->Base);
-      /* Driver should be able to handle any texenv programs as long as
-       * the driver correctly reported max number of texture units correctly,
-       * etc.
-       */
-      ASSERT(ok);
-      (void) ok; /* silence unused var warning */
-   }
-
-   if (DISASSEM) {
-      _mesa_print_program(&p.program->Base);
-      printf("\n");
-   }
-}
-
-
-/**
- * Return a fragment program which implements the current
- * fixed-function texture, fog and color-sum operations.
- */
-struct gl_fragment_program *
-_mesa_get_fixed_func_fragment_program(GLcontext *ctx)
-{
-   struct gl_fragment_program *prog;
-   struct state_key key;
-   GLuint keySize;
-	
-   keySize = make_state_key(ctx, &key);
-      
-   prog = (struct gl_fragment_program *)
-      _mesa_search_program_cache(ctx->FragmentProgram.Cache,
-                                 &key, keySize);
-
-   if (!prog) {
-      prog = (struct gl_fragment_program *) 
-         ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
-
-      create_new_program(ctx, &key, prog);
-
-      _mesa_program_cache_insert(ctx, ctx->FragmentProgram.Cache,
-                                 &key, keySize, &prog->Base);
-   }
-
-   return prog;
-}
+/**************************************************************************

+ * 

+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.

+ * All Rights Reserved.

+ * Copyright 2009 VMware, Inc.  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, 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 TUNGSTEN GRAPHICS AND/OR ITS 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.

+ * 

+ **************************************************************************/

+

+#include "glheader.h"

+#include "imports.h"

+#include "program/program.h"

+#include "program/prog_parameter.h"

+#include "program/prog_cache.h"

+#include "program/prog_instruction.h"

+#include "program/prog_print.h"

+#include "program/prog_statevars.h"

+#include "program/programopt.h"

+#include "texenvprogram.h"

+

+

+/*

+ * Note on texture units:

+ *

+ * The number of texture units supported by fixed-function fragment

+ * processing is MAX_TEXTURE_COORD_UNITS, not MAX_TEXTURE_IMAGE_UNITS.

+ * That's because there's a one-to-one correspondence between texture

+ * coordinates and samplers in fixed-function processing.

+ *

+ * Since fixed-function vertex processing is limited to MAX_TEXTURE_COORD_UNITS

+ * sets of texcoords, so is fixed-function fragment processing.

+ *

+ * We can safely use ctx->Const.MaxTextureUnits for loop bounds.

+ */

+

+

+struct texenvprog_cache_item

+{

+   GLuint hash;

+   void *key;

+   struct gl_fragment_program *data;

+   struct texenvprog_cache_item *next;

+};

+

+static GLboolean

+texenv_doing_secondary_color(struct gl_context *ctx)

+{

+   if (ctx->Light.Enabled &&

+       (ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR))

+      return GL_TRUE;

+

+   if (ctx->Fog.ColorSumEnabled)

+      return GL_TRUE;

+

+   return GL_FALSE;

+}

+

+/**

+ * Up to nine instructions per tex unit, plus fog, specular color.

+ */

+#define MAX_INSTRUCTIONS ((MAX_TEXTURE_COORD_UNITS * 9) + 12)

+

+#define DISASSEM (MESA_VERBOSE & VERBOSE_DISASSEM)

+

+struct mode_opt {

+#ifdef __GNUC__

+   __extension__ GLubyte Source:4;  /**< SRC_x */

+   __extension__ GLubyte Operand:3; /**< OPR_x */

+#else

+   GLubyte Source;  /**< SRC_x */

+   GLubyte Operand; /**< OPR_x */

+#endif

+};

+

+struct state_key {

+   GLuint nr_enabled_units:8;

+   GLuint enabled_units:8;

+   GLuint separate_specular:1;

+   GLuint fog_enabled:1;

+   GLuint fog_mode:2;          /**< FOG_x */

+   GLuint inputs_available:12;

+   GLuint num_draw_buffers:4;

+

+   /* NOTE: This array of structs must be last! (see "keySize" below) */

+   struct {

+      GLuint enabled:1;

+      GLuint source_index:3;   /**< TEXTURE_x_INDEX */

+      GLuint shadow:1;

+      GLuint ScaleShiftRGB:2;

+      GLuint ScaleShiftA:2;

+

+      GLuint NumArgsRGB:3;  /**< up to MAX_COMBINER_TERMS */

+      GLuint ModeRGB:5;     /**< MODE_x */

+

+      GLuint NumArgsA:3;  /**< up to MAX_COMBINER_TERMS */

+      GLuint ModeA:5;     /**< MODE_x */

+

+      GLuint texture_cyl_wrap:1; /**< For gallium test/debug only */

+

+      struct mode_opt OptRGB[MAX_COMBINER_TERMS];

+      struct mode_opt OptA[MAX_COMBINER_TERMS];

+   } unit[MAX_TEXTURE_UNITS];

+};

+

+#define FOG_LINEAR  0

+#define FOG_EXP     1

+#define FOG_EXP2    2

+#define FOG_UNKNOWN 3

+

+static GLuint translate_fog_mode( GLenum mode )

+{

+   switch (mode) {

+   case GL_LINEAR: return FOG_LINEAR;

+   case GL_EXP: return FOG_EXP;

+   case GL_EXP2: return FOG_EXP2;

+   default: return FOG_UNKNOWN;

+   }

+}

+

+#define OPR_SRC_COLOR           0

+#define OPR_ONE_MINUS_SRC_COLOR 1

+#define OPR_SRC_ALPHA           2

+#define OPR_ONE_MINUS_SRC_ALPHA	3

+#define OPR_ZERO                4

+#define OPR_ONE                 5

+#define OPR_UNKNOWN             7

+

+static GLuint translate_operand( GLenum operand )

+{

+   switch (operand) {

+   case GL_SRC_COLOR: return OPR_SRC_COLOR;

+   case GL_ONE_MINUS_SRC_COLOR: return OPR_ONE_MINUS_SRC_COLOR;

+   case GL_SRC_ALPHA: return OPR_SRC_ALPHA;

+   case GL_ONE_MINUS_SRC_ALPHA: return OPR_ONE_MINUS_SRC_ALPHA;

+   case GL_ZERO: return OPR_ZERO;

+   case GL_ONE: return OPR_ONE;

+   default:

+      assert(0);

+      return OPR_UNKNOWN;

+   }

+}

+

+#define SRC_TEXTURE  0

+#define SRC_TEXTURE0 1

+#define SRC_TEXTURE1 2

+#define SRC_TEXTURE2 3

+#define SRC_TEXTURE3 4

+#define SRC_TEXTURE4 5

+#define SRC_TEXTURE5 6

+#define SRC_TEXTURE6 7

+#define SRC_TEXTURE7 8

+#define SRC_CONSTANT 9

+#define SRC_PRIMARY_COLOR 10

+#define SRC_PREVIOUS 11

+#define SRC_ZERO     12

+#define SRC_UNKNOWN  15

+

+static GLuint translate_source( GLenum src )

+{

+   switch (src) {

+   case GL_TEXTURE: return SRC_TEXTURE;

+   case GL_TEXTURE0:

+   case GL_TEXTURE1:

+   case GL_TEXTURE2:

+   case GL_TEXTURE3:

+   case GL_TEXTURE4:

+   case GL_TEXTURE5:

+   case GL_TEXTURE6:

+   case GL_TEXTURE7: return SRC_TEXTURE0 + (src - GL_TEXTURE0);

+   case GL_CONSTANT: return SRC_CONSTANT;

+   case GL_PRIMARY_COLOR: return SRC_PRIMARY_COLOR;

+   case GL_PREVIOUS: return SRC_PREVIOUS;

+   case GL_ZERO:

+      return SRC_ZERO;

+   default:

+      assert(0);

+      return SRC_UNKNOWN;

+   }

+}

+

+#define MODE_REPLACE                     0  /* r = a0 */

+#define MODE_MODULATE                    1  /* r = a0 * a1 */

+#define MODE_ADD                         2  /* r = a0 + a1 */

+#define MODE_ADD_SIGNED                  3  /* r = a0 + a1 - 0.5 */

+#define MODE_INTERPOLATE                 4  /* r = a0 * a2 + a1 * (1 - a2) */

+#define MODE_SUBTRACT                    5  /* r = a0 - a1 */

+#define MODE_DOT3_RGB                    6  /* r = a0 . a1 */

+#define MODE_DOT3_RGB_EXT                7  /* r = a0 . a1 */

+#define MODE_DOT3_RGBA                   8  /* r = a0 . a1 */

+#define MODE_DOT3_RGBA_EXT               9  /* r = a0 . a1 */

+#define MODE_MODULATE_ADD_ATI           10  /* r = a0 * a2 + a1 */

+#define MODE_MODULATE_SIGNED_ADD_ATI    11  /* r = a0 * a2 + a1 - 0.5 */

+#define MODE_MODULATE_SUBTRACT_ATI      12  /* r = a0 * a2 - a1 */

+#define MODE_ADD_PRODUCTS               13  /* r = a0 * a1 + a2 * a3 */

+#define MODE_ADD_PRODUCTS_SIGNED        14  /* r = a0 * a1 + a2 * a3 - 0.5 */

+#define MODE_BUMP_ENVMAP_ATI            15  /* special */

+#define MODE_UNKNOWN                    16

+

+/**

+ * Translate GL combiner state into a MODE_x value

+ */

+static GLuint translate_mode( GLenum envMode, GLenum mode )

+{

+   switch (mode) {

+   case GL_REPLACE: return MODE_REPLACE;

+   case GL_MODULATE: return MODE_MODULATE;

+   case GL_ADD:

+      if (envMode == GL_COMBINE4_NV)

+         return MODE_ADD_PRODUCTS;

+      else

+         return MODE_ADD;

+   case GL_ADD_SIGNED:

+      if (envMode == GL_COMBINE4_NV)

+         return MODE_ADD_PRODUCTS_SIGNED;

+      else

+         return MODE_ADD_SIGNED;

+   case GL_INTERPOLATE: return MODE_INTERPOLATE;

+   case GL_SUBTRACT: return MODE_SUBTRACT;

+   case GL_DOT3_RGB: return MODE_DOT3_RGB;

+   case GL_DOT3_RGB_EXT: return MODE_DOT3_RGB_EXT;

+   case GL_DOT3_RGBA: return MODE_DOT3_RGBA;

+   case GL_DOT3_RGBA_EXT: return MODE_DOT3_RGBA_EXT;

+   case GL_MODULATE_ADD_ATI: return MODE_MODULATE_ADD_ATI;

+   case GL_MODULATE_SIGNED_ADD_ATI: return MODE_MODULATE_SIGNED_ADD_ATI;

+   case GL_MODULATE_SUBTRACT_ATI: return MODE_MODULATE_SUBTRACT_ATI;

+   case GL_BUMP_ENVMAP_ATI: return MODE_BUMP_ENVMAP_ATI;

+   default:

+      assert(0);

+      return MODE_UNKNOWN;

+   }

+}

+

+

+/**

+ * Do we need to clamp the results of the given texture env/combine mode?

+ * If the inputs to the mode are in [0,1] we don't always have to clamp

+ * the results.

+ */

+static GLboolean

+need_saturate( GLuint mode )

+{

+   switch (mode) {

+   case MODE_REPLACE:

+   case MODE_MODULATE:

+   case MODE_INTERPOLATE:

+      return GL_FALSE;

+   case MODE_ADD:

+   case MODE_ADD_SIGNED:

+   case MODE_SUBTRACT:

+   case MODE_DOT3_RGB:

+   case MODE_DOT3_RGB_EXT:

+   case MODE_DOT3_RGBA:

+   case MODE_DOT3_RGBA_EXT:

+   case MODE_MODULATE_ADD_ATI:

+   case MODE_MODULATE_SIGNED_ADD_ATI:

+   case MODE_MODULATE_SUBTRACT_ATI:

+   case MODE_ADD_PRODUCTS:

+   case MODE_ADD_PRODUCTS_SIGNED:

+   case MODE_BUMP_ENVMAP_ATI:

+      return GL_TRUE;

+   default:

+      assert(0);

+      return GL_FALSE;

+   }

+}

+

+

+

+/**

+ * Translate TEXTURE_x_BIT to TEXTURE_x_INDEX.

+ */

+static GLuint translate_tex_src_bit( GLbitfield bit )

+{

+   ASSERT(bit);

+   return _mesa_ffs(bit) - 1;

+}

+

+

+#define VERT_BIT_TEX_ANY    (0xff << VERT_ATTRIB_TEX0)

+#define VERT_RESULT_TEX_ANY (0xff << VERT_RESULT_TEX0)

+

+/**

+ * Identify all possible varying inputs.  The fragment program will

+ * never reference non-varying inputs, but will track them via state

+ * constants instead.

+ *

+ * This function figures out all the inputs that the fragment program

+ * has access to.  The bitmask is later reduced to just those which

+ * are actually referenced.

+ */

+static GLbitfield get_fp_input_mask( struct gl_context *ctx )

+{

+   /* _NEW_PROGRAM */

+   const GLboolean vertexShader =

+      (ctx->Shader.CurrentVertexProgram &&

+       ctx->Shader.CurrentVertexProgram->LinkStatus &&

+       ctx->Shader.CurrentVertexProgram->VertexProgram);

+   const GLboolean vertexProgram = ctx->VertexProgram._Enabled;

+   GLbitfield fp_inputs = 0x0;

+

+   if (ctx->VertexProgram._Overriden) {

+      /* Somebody's messing with the vertex program and we don't have

+       * a clue what's happening.  Assume that it could be producing

+       * all possible outputs.

+       */

+      fp_inputs = ~0;

+   }

+   else if (ctx->RenderMode == GL_FEEDBACK) {

+      /* _NEW_RENDERMODE */

+      fp_inputs = (FRAG_BIT_COL0 | FRAG_BIT_TEX0);

+   }

+   else if (!(vertexProgram || vertexShader) ||

+            !ctx->VertexProgram._Current) {

+      /* Fixed function vertex logic */

+      /* _NEW_ARRAY */

+      GLbitfield varying_inputs = ctx->varying_vp_inputs;

+

+      /* These get generated in the setup routine regardless of the

+       * vertex program:

+       */

+      /* _NEW_POINT */

+      if (ctx->Point.PointSprite)

+         varying_inputs |= FRAG_BITS_TEX_ANY;

+

+      /* First look at what values may be computed by the generated

+       * vertex program:

+       */

+      /* _NEW_LIGHT */

+      if (ctx->Light.Enabled) {

+         fp_inputs |= FRAG_BIT_COL0;

+

+         if (texenv_doing_secondary_color(ctx))

+            fp_inputs |= FRAG_BIT_COL1;

+      }

+

+      /* _NEW_TEXTURE */

+      fp_inputs |= (ctx->Texture._TexGenEnabled |

+                    ctx->Texture._TexMatEnabled) << FRAG_ATTRIB_TEX0;

+

+      /* Then look at what might be varying as a result of enabled

+       * arrays, etc:

+       */

+      if (varying_inputs & VERT_BIT_COLOR0)

+         fp_inputs |= FRAG_BIT_COL0;

+      if (varying_inputs & VERT_BIT_COLOR1)

+         fp_inputs |= FRAG_BIT_COL1;

+

+      fp_inputs |= (((varying_inputs & VERT_BIT_TEX_ANY) >> VERT_ATTRIB_TEX0) 

+                    << FRAG_ATTRIB_TEX0);

+

+   }

+   else {

+      /* calculate from vp->outputs */

+      struct gl_vertex_program *vprog;

+      GLbitfield64 vp_outputs;

+

+      /* Choose GLSL vertex shader over ARB vertex program.  Need this

+       * since vertex shader state validation comes after fragment state

+       * validation (see additional comments in state.c).

+       */

+      if (vertexShader)

+         vprog = ctx->Shader.CurrentVertexProgram->VertexProgram;

+      else

+         vprog = ctx->VertexProgram.Current;

+

+      vp_outputs = vprog->Base.OutputsWritten;

+

+      /* These get generated in the setup routine regardless of the

+       * vertex program:

+       */

+      /* _NEW_POINT */

+      if (ctx->Point.PointSprite)

+         vp_outputs |= FRAG_BITS_TEX_ANY;

+

+      if (vp_outputs & (1 << VERT_RESULT_COL0))

+         fp_inputs |= FRAG_BIT_COL0;

+      if (vp_outputs & (1 << VERT_RESULT_COL1))

+         fp_inputs |= FRAG_BIT_COL1;

+

+      fp_inputs |= (((vp_outputs & VERT_RESULT_TEX_ANY) >> VERT_RESULT_TEX0) 

+                    << FRAG_ATTRIB_TEX0);

+   }

+   

+   return fp_inputs;

+}

+

+

+/**

+ * Examine current texture environment state and generate a unique

+ * key to identify it.

+ */

+static GLuint make_state_key( struct gl_context *ctx,  struct state_key *key )

+{

+   GLuint i, j;

+   GLbitfield inputs_referenced = FRAG_BIT_COL0;

+   const GLbitfield inputs_available = get_fp_input_mask( ctx );

+   GLuint keySize;

+

+   memset(key, 0, sizeof(*key));

+

+   /* _NEW_TEXTURE */

+   for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {

+      const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];

+      const struct gl_texture_object *texObj = texUnit->_Current;

+      const struct gl_tex_env_combine_state *comb = texUnit->_CurrentCombine;

+      GLenum format;

+

+      if (!texUnit->_ReallyEnabled || !texUnit->Enabled)

+         continue;

+

+      format = texObj->Image[0][texObj->BaseLevel]->_BaseFormat;

+

+      key->unit[i].enabled = 1;

+      key->enabled_units |= (1<<i);

+      key->nr_enabled_units = i + 1;

+      inputs_referenced |= FRAG_BIT_TEX(i);

+

+      key->unit[i].source_index =

+         translate_tex_src_bit(texUnit->_ReallyEnabled);

+

+      key->unit[i].shadow = ((texObj->CompareMode == GL_COMPARE_R_TO_TEXTURE) &&

+                             ((format == GL_DEPTH_COMPONENT) || 

+                              (format == GL_DEPTH_STENCIL_EXT)));

+

+      key->unit[i].NumArgsRGB = comb->_NumArgsRGB;

+      key->unit[i].NumArgsA = comb->_NumArgsA;

+

+      key->unit[i].ModeRGB =

+	 translate_mode(texUnit->EnvMode, comb->ModeRGB);

+      key->unit[i].ModeA =

+	 translate_mode(texUnit->EnvMode, comb->ModeA);

+

+      key->unit[i].ScaleShiftRGB = comb->ScaleShiftRGB;

+      key->unit[i].ScaleShiftA = comb->ScaleShiftA;

+

+      for (j = 0; j < MAX_COMBINER_TERMS; j++) {

+         key->unit[i].OptRGB[j].Operand = translate_operand(comb->OperandRGB[j]);

+         key->unit[i].OptA[j].Operand = translate_operand(comb->OperandA[j]);

+         key->unit[i].OptRGB[j].Source = translate_source(comb->SourceRGB[j]);

+         key->unit[i].OptA[j].Source = translate_source(comb->SourceA[j]);

+      }

+

+      if (key->unit[i].ModeRGB == MODE_BUMP_ENVMAP_ATI) {

+         /* requires some special translation */

+         key->unit[i].NumArgsRGB = 2;

+         key->unit[i].ScaleShiftRGB = 0;

+         key->unit[i].OptRGB[0].Operand = OPR_SRC_COLOR;

+         key->unit[i].OptRGB[0].Source = SRC_TEXTURE;

+         key->unit[i].OptRGB[1].Operand = OPR_SRC_COLOR;

+         key->unit[i].OptRGB[1].Source = texUnit->BumpTarget - GL_TEXTURE0 + SRC_TEXTURE0;

+       }

+

+      /* this is a back-door for enabling cylindrical texture wrap mode */

+      if (texObj->Priority == 0.125)

+         key->unit[i].texture_cyl_wrap = 1;

+   }

+

+   /* _NEW_LIGHT | _NEW_FOG */

+   if (texenv_doing_secondary_color(ctx)) {

+      key->separate_specular = 1;

+      inputs_referenced |= FRAG_BIT_COL1;

+   }

+

+   /* _NEW_FOG */

+   if (ctx->Fog.Enabled) {

+      key->fog_enabled = 1;

+      key->fog_mode = translate_fog_mode(ctx->Fog.Mode);

+      inputs_referenced |= FRAG_BIT_FOGC; /* maybe */

+   }

+

+   /* _NEW_BUFFERS */

+   key->num_draw_buffers = ctx->DrawBuffer->_NumColorDrawBuffers;

+

+   key->inputs_available = (inputs_available & inputs_referenced);

+

+   /* compute size of state key, ignoring unused texture units */

+   keySize = sizeof(*key) - sizeof(key->unit)

+      + key->nr_enabled_units * sizeof(key->unit[0]);

+

+   return keySize;

+}

+

+

+/**

+ * Use uregs to represent registers internally, translate to Mesa's

+ * expected formats on emit.  

+ *

+ * NOTE: These are passed by value extensively in this file rather

+ * than as usual by pointer reference.  If this disturbs you, try

+ * remembering they are just 32bits in size.

+ *

+ * GCC is smart enough to deal with these dword-sized structures in

+ * much the same way as if I had defined them as dwords and was using

+ * macros to access and set the fields.  This is much nicer and easier

+ * to evolve.

+ */

+struct ureg {

+   GLuint file:4;

+   GLuint idx:8;

+   GLuint negatebase:1;

+   GLuint swz:12;

+   GLuint pad:7;

+};

+

+static const struct ureg undef = { 

+   PROGRAM_UNDEFINED,

+   ~0,

+   0,

+   0,

+   0

+};

+

+

+/** State used to build the fragment program:

+ */

+struct texenv_fragment_program {

+   struct gl_fragment_program *program;

+   struct state_key *state;

+

+   GLbitfield alu_temps;	/**< Track texture indirections, see spec. */

+   GLbitfield temps_output;	/**< Track texture indirections, see spec. */

+   GLbitfield temp_in_use;	/**< Tracks temporary regs which are in use. */

+   GLboolean error;

+

+   struct ureg src_texture[MAX_TEXTURE_COORD_UNITS];   

+   /* Reg containing each texture unit's sampled texture color,

+    * else undef.

+    */

+

+   struct ureg texcoord_tex[MAX_TEXTURE_COORD_UNITS];

+   /* Reg containing texcoord for a texture unit,

+    * needed for bump mapping, else undef.

+    */

+

+   struct ureg src_previous;	/**< Reg containing color from previous 

+				 * stage.  May need to be decl'd.

+				 */

+

+   GLuint last_tex_stage;	/**< Number of last enabled texture unit */

+

+   struct ureg half;

+   struct ureg one;

+   struct ureg zero;

+};

+

+

+

+static struct ureg make_ureg(GLuint file, GLuint idx)

+{

+   struct ureg reg;

+   reg.file = file;

+   reg.idx = idx;

+   reg.negatebase = 0;

+   reg.swz = SWIZZLE_NOOP;

+   reg.pad = 0;

+   return reg;

+}

+

+static struct ureg swizzle( struct ureg reg, int x, int y, int z, int w )

+{

+   reg.swz = MAKE_SWIZZLE4(GET_SWZ(reg.swz, x),

+			   GET_SWZ(reg.swz, y),

+			   GET_SWZ(reg.swz, z),

+			   GET_SWZ(reg.swz, w));

+

+   return reg;

+}

+

+static struct ureg swizzle1( struct ureg reg, int x )

+{

+   return swizzle(reg, x, x, x, x);

+}

+

+static struct ureg negate( struct ureg reg )

+{

+   reg.negatebase ^= 1;

+   return reg;

+}

+

+static GLboolean is_undef( struct ureg reg )

+{

+   return reg.file == PROGRAM_UNDEFINED;

+}

+

+

+static struct ureg get_temp( struct texenv_fragment_program *p )

+{

+   GLint bit;

+   

+   /* First try and reuse temps which have been used already:

+    */

+   bit = _mesa_ffs( ~p->temp_in_use & p->alu_temps );

+

+   /* Then any unused temporary:

+    */

+   if (!bit)

+      bit = _mesa_ffs( ~p->temp_in_use );

+

+   if (!bit) {

+      _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__);

+      exit(1);

+   }

+

+   if ((GLuint) bit > p->program->Base.NumTemporaries)

+      p->program->Base.NumTemporaries = bit;

+

+   p->temp_in_use |= 1<<(bit-1);

+   return make_ureg(PROGRAM_TEMPORARY, (bit-1));

+}

+

+static struct ureg get_tex_temp( struct texenv_fragment_program *p )

+{

+   int bit;

+   

+   /* First try to find available temp not previously used (to avoid

+    * starting a new texture indirection).  According to the spec, the

+    * ~p->temps_output isn't necessary, but will keep it there for

+    * now:

+    */

+   bit = _mesa_ffs( ~p->temp_in_use & ~p->alu_temps & ~p->temps_output );

+

+   /* Then any unused temporary:

+    */

+   if (!bit) 

+      bit = _mesa_ffs( ~p->temp_in_use );

+

+   if (!bit) {

+      _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__);

+      exit(1);

+   }

+

+   if ((GLuint) bit > p->program->Base.NumTemporaries)

+      p->program->Base.NumTemporaries = bit;

+

+   p->temp_in_use |= 1<<(bit-1);

+   return make_ureg(PROGRAM_TEMPORARY, (bit-1));

+}

+

+

+/** Mark a temp reg as being no longer allocatable. */

+static void reserve_temp( struct texenv_fragment_program *p, struct ureg r )

+{

+   if (r.file == PROGRAM_TEMPORARY)

+      p->temps_output |= (1 << r.idx);

+}

+

+

+static void release_temps(struct gl_context *ctx, struct texenv_fragment_program *p )

+{

+   GLuint max_temp = ctx->Const.FragmentProgram.MaxTemps;

+

+   /* KW: To support tex_env_crossbar, don't release the registers in

+    * temps_output.

+    */

+   if (max_temp >= sizeof(int) * 8)

+      p->temp_in_use = p->temps_output;

+   else

+      p->temp_in_use = ~((1<<max_temp)-1) | p->temps_output;

+}

+

+

+static struct ureg register_param5( struct texenv_fragment_program *p, 

+				    GLint s0,

+				    GLint s1,

+				    GLint s2,

+				    GLint s3,

+				    GLint s4)

+{

+   gl_state_index tokens[STATE_LENGTH];

+   GLuint idx;

+   tokens[0] = s0;

+   tokens[1] = s1;

+   tokens[2] = s2;

+   tokens[3] = s3;

+   tokens[4] = s4;

+   idx = _mesa_add_state_reference( p->program->Base.Parameters, tokens );

+   return make_ureg(PROGRAM_STATE_VAR, idx);

+}

+

+

+#define register_param1(p,s0)          register_param5(p,s0,0,0,0,0)

+#define register_param2(p,s0,s1)       register_param5(p,s0,s1,0,0,0)

+#define register_param3(p,s0,s1,s2)    register_param5(p,s0,s1,s2,0,0)

+#define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0)

+

+static GLuint frag_to_vert_attrib( GLuint attrib )

+{

+   switch (attrib) {

+   case FRAG_ATTRIB_COL0: return VERT_ATTRIB_COLOR0;

+   case FRAG_ATTRIB_COL1: return VERT_ATTRIB_COLOR1;

+   default:

+      assert(attrib >= FRAG_ATTRIB_TEX0);

+      assert(attrib <= FRAG_ATTRIB_TEX7);

+      return attrib - FRAG_ATTRIB_TEX0 + VERT_ATTRIB_TEX0;

+   }

+}

+

+

+static struct ureg register_input( struct texenv_fragment_program *p, GLuint input )

+{

+   if (p->state->inputs_available & (1<<input)) {

+      p->program->Base.InputsRead |= (1 << input);

+      return make_ureg(PROGRAM_INPUT, input);

+   }

+   else {

+      GLuint idx = frag_to_vert_attrib( input );

+      return register_param3( p, STATE_INTERNAL, STATE_CURRENT_ATTRIB, idx );

+   }

+}

+

+

+static void emit_arg( struct prog_src_register *reg,

+		      struct ureg ureg )

+{

+   reg->File = ureg.file;

+   reg->Index = ureg.idx;

+   reg->Swizzle = ureg.swz;

+   reg->Negate = ureg.negatebase ? NEGATE_XYZW : NEGATE_NONE;

+   reg->Abs = GL_FALSE;

+}

+

+static void emit_dst( struct prog_dst_register *dst,

+		      struct ureg ureg, GLuint mask )

+{

+   dst->File = ureg.file;

+   dst->Index = ureg.idx;

+   dst->WriteMask = mask;

+   dst->CondMask = COND_TR;  /* always pass cond test */

+   dst->CondSwizzle = SWIZZLE_NOOP;

+}

+

+static struct prog_instruction *

+emit_op(struct texenv_fragment_program *p,

+	enum prog_opcode op,

+	struct ureg dest,

+	GLuint mask,

+	GLboolean saturate,

+	struct ureg src0,

+	struct ureg src1,

+	struct ureg src2 )

+{

+   const GLuint nr = p->program->Base.NumInstructions++;

+   struct prog_instruction *inst = &p->program->Base.Instructions[nr];

+

+   assert(nr < MAX_INSTRUCTIONS);

+

+   _mesa_init_instructions(inst, 1);

+   inst->Opcode = op;

+   

+   emit_arg( &inst->SrcReg[0], src0 );

+   emit_arg( &inst->SrcReg[1], src1 );

+   emit_arg( &inst->SrcReg[2], src2 );

+   

+   inst->SaturateMode = saturate ? SATURATE_ZERO_ONE : SATURATE_OFF;

+

+   emit_dst( &inst->DstReg, dest, mask );

+

+#if 0

+   /* Accounting for indirection tracking:

+    */

+   if (dest.file == PROGRAM_TEMPORARY)

+      p->temps_output |= 1 << dest.idx;

+#endif

+

+   return inst;

+}

+   

+

+static struct ureg emit_arith( struct texenv_fragment_program *p,

+			       enum prog_opcode op,

+			       struct ureg dest,

+			       GLuint mask,

+			       GLboolean saturate,

+			       struct ureg src0,

+			       struct ureg src1,

+			       struct ureg src2 )

+{

+   emit_op(p, op, dest, mask, saturate, src0, src1, src2);

+   

+   /* Accounting for indirection tracking:

+    */

+   if (src0.file == PROGRAM_TEMPORARY)

+      p->alu_temps |= 1 << src0.idx;

+

+   if (!is_undef(src1) && src1.file == PROGRAM_TEMPORARY)

+      p->alu_temps |= 1 << src1.idx;

+

+   if (!is_undef(src2) && src2.file == PROGRAM_TEMPORARY)

+      p->alu_temps |= 1 << src2.idx;

+

+   if (dest.file == PROGRAM_TEMPORARY)

+      p->alu_temps |= 1 << dest.idx;

+       

+   p->program->Base.NumAluInstructions++;

+   return dest;

+}

+

+static struct ureg emit_texld( struct texenv_fragment_program *p,

+			       enum prog_opcode op,

+			       struct ureg dest,

+			       GLuint destmask,

+			       GLuint tex_unit,

+			       GLuint tex_idx,

+                               GLuint tex_shadow,

+			       struct ureg coord )

+{

+   struct prog_instruction *inst = emit_op( p, op, 

+					  dest, destmask, 

+					  GL_FALSE,	/* don't saturate? */

+					  coord, 	/* arg 0? */

+					  undef,

+					  undef);

+   

+   inst->TexSrcTarget = tex_idx;

+   inst->TexSrcUnit = tex_unit;

+   inst->TexShadow = tex_shadow;

+

+   p->program->Base.NumTexInstructions++;

+

+   /* Accounting for indirection tracking:

+    */

+   reserve_temp(p, dest);

+

+#if 0

+   /* Is this a texture indirection?

+    */

+   if ((coord.file == PROGRAM_TEMPORARY &&

+	(p->temps_output & (1<<coord.idx))) ||

+       (dest.file == PROGRAM_TEMPORARY &&

+	(p->alu_temps & (1<<dest.idx)))) {

+      p->program->Base.NumTexIndirections++;

+      p->temps_output = 1<<coord.idx;

+      p->alu_temps = 0;

+      assert(0);		/* KW: texture env crossbar */

+   }

+#endif

+

+   return dest;

+}

+

+

+static struct ureg register_const4f( struct texenv_fragment_program *p, 

+				     GLfloat s0,

+				     GLfloat s1,

+				     GLfloat s2,

+				     GLfloat s3)

+{

+   GLfloat values[4];

+   GLuint idx, swizzle;

+   struct ureg r;

+   values[0] = s0;

+   values[1] = s1;

+   values[2] = s2;

+   values[3] = s3;

+   idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4,

+                                     &swizzle );

+   r = make_ureg(PROGRAM_CONSTANT, idx);

+   r.swz = swizzle;

+   return r;

+}

+

+#define register_scalar_const(p, s0)    register_const4f(p, s0, s0, s0, s0)

+#define register_const1f(p, s0)         register_const4f(p, s0, 0, 0, 1)

+#define register_const2f(p, s0, s1)     register_const4f(p, s0, s1, 0, 1)

+#define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1)

+

+

+static struct ureg get_one( struct texenv_fragment_program *p )

+{

+   if (is_undef(p->one)) 

+      p->one = register_scalar_const(p, 1.0);

+   return p->one;

+}

+

+static struct ureg get_half( struct texenv_fragment_program *p )

+{

+   if (is_undef(p->half)) 

+      p->half = register_scalar_const(p, 0.5);

+   return p->half;

+}

+

+static struct ureg get_zero( struct texenv_fragment_program *p )

+{

+   if (is_undef(p->zero)) 

+      p->zero = register_scalar_const(p, 0.0);

+   return p->zero;

+}

+

+

+static void program_error( struct texenv_fragment_program *p, const char *msg )

+{

+   _mesa_problem(NULL, "%s", msg);

+   p->error = 1;

+}

+

+static struct ureg get_source( struct texenv_fragment_program *p, 

+			       GLuint src, GLuint unit )

+{

+   switch (src) {

+   case SRC_TEXTURE: 

+      assert(!is_undef(p->src_texture[unit]));

+      return p->src_texture[unit];

+

+   case SRC_TEXTURE0:

+   case SRC_TEXTURE1:

+   case SRC_TEXTURE2:

+   case SRC_TEXTURE3:

+   case SRC_TEXTURE4:

+   case SRC_TEXTURE5:

+   case SRC_TEXTURE6:

+   case SRC_TEXTURE7: 

+      assert(!is_undef(p->src_texture[src - SRC_TEXTURE0]));

+      return p->src_texture[src - SRC_TEXTURE0];

+

+   case SRC_CONSTANT:

+      return register_param2(p, STATE_TEXENV_COLOR, unit);

+

+   case SRC_PRIMARY_COLOR:

+      return register_input(p, FRAG_ATTRIB_COL0);

+

+   case SRC_ZERO:

+      return get_zero(p);

+

+   case SRC_PREVIOUS:

+      if (is_undef(p->src_previous))

+	 return register_input(p, FRAG_ATTRIB_COL0);

+      else

+	 return p->src_previous;

+

+   default:

+      assert(0);

+      return undef;

+   }

+}

+

+static struct ureg emit_combine_source( struct texenv_fragment_program *p, 

+					GLuint mask,

+					GLuint unit,

+					GLuint source, 

+					GLuint operand )

+{

+   struct ureg arg, src, one;

+

+   src = get_source(p, source, unit);

+

+   switch (operand) {

+   case OPR_ONE_MINUS_SRC_COLOR: 

+      /* Get unused tmp,

+       * Emit tmp = 1.0 - arg.xyzw

+       */

+      arg = get_temp( p );

+      one = get_one( p );

+      return emit_arith( p, OPCODE_SUB, arg, mask, 0, one, src, undef);

+

+   case OPR_SRC_ALPHA: 

+      if (mask == WRITEMASK_W)

+	 return src;

+      else

+	 return swizzle1( src, SWIZZLE_W );

+   case OPR_ONE_MINUS_SRC_ALPHA: 

+      /* Get unused tmp,

+       * Emit tmp = 1.0 - arg.wwww

+       */

+      arg = get_temp(p);

+      one = get_one(p);

+      return emit_arith(p, OPCODE_SUB, arg, mask, 0,

+			one, swizzle1(src, SWIZZLE_W), undef);

+   case OPR_ZERO:

+      return get_zero(p);

+   case OPR_ONE:

+      return get_one(p);

+   case OPR_SRC_COLOR: 

+      return src;

+   default:

+      assert(0);

+      return src;

+   }

+}

+

+/**

+ * Check if the RGB and Alpha sources and operands match for the given

+ * texture unit's combinder state.  When the RGB and A sources and

+ * operands match, we can emit fewer instructions.

+ */

+static GLboolean args_match( const struct state_key *key, GLuint unit )

+{

+   GLuint i, numArgs = key->unit[unit].NumArgsRGB;

+

+   for (i = 0; i < numArgs; i++) {

+      if (key->unit[unit].OptA[i].Source != key->unit[unit].OptRGB[i].Source) 

+	 return GL_FALSE;

+

+      switch (key->unit[unit].OptA[i].Operand) {

+      case OPR_SRC_ALPHA: 

+	 switch (key->unit[unit].OptRGB[i].Operand) {

+	 case OPR_SRC_COLOR: 

+	 case OPR_SRC_ALPHA: 

+	    break;

+	 default:

+	    return GL_FALSE;

+	 }

+	 break;

+      case OPR_ONE_MINUS_SRC_ALPHA: 

+	 switch (key->unit[unit].OptRGB[i].Operand) {

+	 case OPR_ONE_MINUS_SRC_COLOR: 

+	 case OPR_ONE_MINUS_SRC_ALPHA: 

+	    break;

+	 default:

+	    return GL_FALSE;

+	 }

+	 break;

+      default: 

+	 return GL_FALSE;	/* impossible */

+      }

+   }

+

+   return GL_TRUE;

+}

+

+static struct ureg emit_combine( struct texenv_fragment_program *p,

+				 struct ureg dest,

+				 GLuint mask,

+				 GLboolean saturate,

+				 GLuint unit,

+				 GLuint nr,

+				 GLuint mode,

+				 const struct mode_opt *opt)

+{

+   struct ureg src[MAX_COMBINER_TERMS];

+   struct ureg tmp, half;

+   GLuint i;

+

+   assert(nr <= MAX_COMBINER_TERMS);

+

+   for (i = 0; i < nr; i++)

+      src[i] = emit_combine_source( p, mask, unit, opt[i].Source, opt[i].Operand );

+

+   switch (mode) {

+   case MODE_REPLACE: 

+      if (mask == WRITEMASK_XYZW && !saturate)

+	 return src[0];

+      else

+	 return emit_arith( p, OPCODE_MOV, dest, mask, saturate, src[0], undef, undef );

+   case MODE_MODULATE: 

+      return emit_arith( p, OPCODE_MUL, dest, mask, saturate,

+			 src[0], src[1], undef );

+   case MODE_ADD: 

+      return emit_arith( p, OPCODE_ADD, dest, mask, saturate, 

+			 src[0], src[1], undef );

+   case MODE_ADD_SIGNED:

+      /* tmp = arg0 + arg1

+       * result = tmp - .5

+       */

+      half = get_half(p);

+      tmp = get_temp( p );

+      emit_arith( p, OPCODE_ADD, tmp, mask, 0, src[0], src[1], undef );

+      emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp, half, undef );

+      return dest;

+   case MODE_INTERPOLATE: 

+      /* Arg0 * (Arg2) + Arg1 * (1-Arg2) -- note arguments are reordered:

+       */

+      return emit_arith( p, OPCODE_LRP, dest, mask, saturate, src[2], src[0], src[1] );

+

+   case MODE_SUBTRACT: 

+      return emit_arith( p, OPCODE_SUB, dest, mask, saturate, src[0], src[1], undef );

+

+   case MODE_DOT3_RGBA:

+   case MODE_DOT3_RGBA_EXT: 

+   case MODE_DOT3_RGB_EXT:

+   case MODE_DOT3_RGB: {

+      struct ureg tmp0 = get_temp( p );

+      struct ureg tmp1 = get_temp( p );

+      struct ureg neg1 = register_scalar_const(p, -1);

+      struct ureg two  = register_scalar_const(p, 2);

+

+      /* tmp0 = 2*src0 - 1

+       * tmp1 = 2*src1 - 1

+       *

+       * dst = tmp0 dot3 tmp1 

+       */

+      emit_arith( p, OPCODE_MAD, tmp0, WRITEMASK_XYZW, 0, 

+		  two, src[0], neg1);

+

+      if (memcmp(&src[0], &src[1], sizeof(struct ureg)) == 0)

+	 tmp1 = tmp0;

+      else

+	 emit_arith( p, OPCODE_MAD, tmp1, WRITEMASK_XYZW, 0, 

+		     two, src[1], neg1);

+      emit_arith( p, OPCODE_DP3, dest, mask, saturate, tmp0, tmp1, undef);

+      return dest;

+   }

+   case MODE_MODULATE_ADD_ATI:

+      /* Arg0 * Arg2 + Arg1 */

+      return emit_arith( p, OPCODE_MAD, dest, mask, saturate,

+			 src[0], src[2], src[1] );

+   case MODE_MODULATE_SIGNED_ADD_ATI: {

+      /* Arg0 * Arg2 + Arg1 - 0.5 */

+      struct ureg tmp0 = get_temp(p);

+      half = get_half(p);

+      emit_arith( p, OPCODE_MAD, tmp0, mask, 0, src[0], src[2], src[1] );

+      emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp0, half, undef );

+      return dest;

+   }

+   case MODE_MODULATE_SUBTRACT_ATI:

+      /* Arg0 * Arg2 - Arg1 */

+      emit_arith( p, OPCODE_MAD, dest, mask, 0, src[0], src[2], negate(src[1]) );

+      return dest;

+   case MODE_ADD_PRODUCTS:

+      /* Arg0 * Arg1 + Arg2 * Arg3 */

+      {

+         struct ureg tmp0 = get_temp(p);

+         emit_arith( p, OPCODE_MUL, tmp0, mask, 0, src[0], src[1], undef );

+         emit_arith( p, OPCODE_MAD, dest, mask, saturate, src[2], src[3], tmp0 );

+      }

+      return dest;

+   case MODE_ADD_PRODUCTS_SIGNED:

+      /* Arg0 * Arg1 + Arg2 * Arg3 - 0.5 */

+      {

+         struct ureg tmp0 = get_temp(p);

+         half = get_half(p);

+         emit_arith( p, OPCODE_MUL, tmp0, mask, 0, src[0], src[1], undef );

+         emit_arith( p, OPCODE_MAD, tmp0, mask, 0, src[2], src[3], tmp0 );

+         emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp0, half, undef );

+      }

+      return dest;

+   case MODE_BUMP_ENVMAP_ATI:

+      /* special - not handled here */

+      assert(0);

+      return src[0];

+   default: 

+      assert(0);

+      return src[0];

+   }

+}

+

+

+/**

+ * Generate instructions for one texture unit's env/combiner mode.

+ */

+static struct ureg

+emit_texenv(struct texenv_fragment_program *p, GLuint unit)

+{

+   const struct state_key *key = p->state;

+   GLboolean rgb_saturate, alpha_saturate;

+   GLuint rgb_shift, alpha_shift;

+   struct ureg out, dest;

+

+   if (!key->unit[unit].enabled) {

+      return get_source(p, SRC_PREVIOUS, 0);

+   }

+   if (key->unit[unit].ModeRGB == MODE_BUMP_ENVMAP_ATI) {

+      /* this isn't really a env stage delivering a color and handled elsewhere */

+      return get_source(p, SRC_PREVIOUS, 0);

+   }

+   

+   switch (key->unit[unit].ModeRGB) {

+   case MODE_DOT3_RGB_EXT:

+      alpha_shift = key->unit[unit].ScaleShiftA;

+      rgb_shift = 0;

+      break;

+   case MODE_DOT3_RGBA_EXT:

+      alpha_shift = 0;

+      rgb_shift = 0;

+      break;

+   default:

+      rgb_shift = key->unit[unit].ScaleShiftRGB;

+      alpha_shift = key->unit[unit].ScaleShiftA;

+      break;

+   }

+   

+   /* If we'll do rgb/alpha shifting don't saturate in emit_combine().

+    * We don't want to clamp twice.

+    */

+   if (rgb_shift)

+      rgb_saturate = GL_FALSE;  /* saturate after rgb shift */

+   else if (need_saturate(key->unit[unit].ModeRGB))

+      rgb_saturate = GL_TRUE;

+   else

+      rgb_saturate = GL_FALSE;

+

+   if (alpha_shift)

+      alpha_saturate = GL_FALSE;  /* saturate after alpha shift */

+   else if (need_saturate(key->unit[unit].ModeA))

+      alpha_saturate = GL_TRUE;

+   else

+      alpha_saturate = GL_FALSE;

+

+   /* If this is the very last calculation (and various other conditions

+    * are met), emit directly to the color output register.  Otherwise,

+    * emit to a temporary register.

+    */

+   if (key->separate_specular ||

+       unit != p->last_tex_stage ||

+       alpha_shift ||

+       key->num_draw_buffers != 1 ||

+       rgb_shift)

+      dest = get_temp( p );

+   else

+      dest = make_ureg(PROGRAM_OUTPUT, FRAG_RESULT_COLOR);

+

+   /* Emit the RGB and A combine ops

+    */

+   if (key->unit[unit].ModeRGB == key->unit[unit].ModeA &&

+       args_match(key, unit)) {

+      out = emit_combine( p, dest, WRITEMASK_XYZW, rgb_saturate,

+			  unit,

+			  key->unit[unit].NumArgsRGB,

+			  key->unit[unit].ModeRGB,

+			  key->unit[unit].OptRGB);

+   }

+   else if (key->unit[unit].ModeRGB == MODE_DOT3_RGBA_EXT ||

+	    key->unit[unit].ModeRGB == MODE_DOT3_RGBA) {

+      out = emit_combine( p, dest, WRITEMASK_XYZW, rgb_saturate,

+			  unit,

+			  key->unit[unit].NumArgsRGB,

+			  key->unit[unit].ModeRGB,

+			  key->unit[unit].OptRGB);

+   }

+   else {

+      /* Need to do something to stop from re-emitting identical

+       * argument calculations here:

+       */

+      out = emit_combine( p, dest, WRITEMASK_XYZ, rgb_saturate,

+			  unit,

+			  key->unit[unit].NumArgsRGB,

+			  key->unit[unit].ModeRGB,

+			  key->unit[unit].OptRGB);

+      out = emit_combine( p, dest, WRITEMASK_W, alpha_saturate,

+			  unit,

+			  key->unit[unit].NumArgsA,

+			  key->unit[unit].ModeA,

+			  key->unit[unit].OptA);

+   }

+

+   /* Deal with the final shift:

+    */

+   if (alpha_shift || rgb_shift) {

+      struct ureg shift;

+      GLboolean saturate = GL_TRUE;  /* always saturate at this point */

+

+      if (rgb_shift == alpha_shift) {

+	 shift = register_scalar_const(p, (GLfloat)(1<<rgb_shift));

+      }

+      else {

+	 shift = register_const4f(p, 

+				  (GLfloat)(1<<rgb_shift),

+				  (GLfloat)(1<<rgb_shift),

+				  (GLfloat)(1<<rgb_shift),

+				  (GLfloat)(1<<alpha_shift));

+      }

+      return emit_arith( p, OPCODE_MUL, dest, WRITEMASK_XYZW, 

+			 saturate, out, shift, undef );

+   }

+   else

+      return out;

+}

+

+

+/**

+ * Generate instruction for getting a texture source term.

+ */

+static void load_texture( struct texenv_fragment_program *p, GLuint unit )

+{

+   if (is_undef(p->src_texture[unit])) {

+      const GLuint texTarget = p->state->unit[unit].source_index;

+      struct ureg texcoord;

+      struct ureg tmp = get_tex_temp( p );

+

+      if (is_undef(p->texcoord_tex[unit])) {

+         texcoord = register_input(p, FRAG_ATTRIB_TEX0+unit);

+      }

+      else {

+         /* might want to reuse this reg for tex output actually */

+         texcoord = p->texcoord_tex[unit];

+      }

+

+      /* TODO: Use D0_MASK_XY where possible.

+       */

+      if (p->state->unit[unit].enabled) {

+         GLboolean shadow = GL_FALSE;

+

+	 if (p->state->unit[unit].shadow) {

+	    p->program->Base.ShadowSamplers |= 1 << unit;

+            shadow = GL_TRUE;

+         }

+

+	 p->src_texture[unit] = emit_texld( p, OPCODE_TXP,

+					    tmp, WRITEMASK_XYZW, 

+					    unit, texTarget, shadow,

+                                            texcoord );

+

+         p->program->Base.SamplersUsed |= (1 << unit);

+         /* This identity mapping should already be in place

+          * (see _mesa_init_program_struct()) but let's be safe.

+          */

+         p->program->Base.SamplerUnits[unit] = unit;

+      }

+      else

+	 p->src_texture[unit] = get_zero(p);

+

+      if (p->state->unit[unit].texture_cyl_wrap) {

+         /* set flag which is checked by Mesa->Gallium program translation */

+         p->program->Base.InputFlags[0] |= PROG_PARAM_BIT_CYL_WRAP;

+      }

+

+   }

+}

+

+static GLboolean load_texenv_source( struct texenv_fragment_program *p, 

+				     GLuint src, GLuint unit )

+{

+   switch (src) {

+   case SRC_TEXTURE:

+      load_texture(p, unit);

+      break;

+

+   case SRC_TEXTURE0:

+   case SRC_TEXTURE1:

+   case SRC_TEXTURE2:

+   case SRC_TEXTURE3:

+   case SRC_TEXTURE4:

+   case SRC_TEXTURE5:

+   case SRC_TEXTURE6:

+   case SRC_TEXTURE7:       

+      load_texture(p, src - SRC_TEXTURE0);

+      break;

+      

+   default:

+      /* not a texture src - do nothing */

+      break;

+   }

+ 

+   return GL_TRUE;

+}

+

+

+/**

+ * Generate instructions for loading all texture source terms.

+ */

+static GLboolean

+load_texunit_sources( struct texenv_fragment_program *p, GLuint unit )

+{

+   const struct state_key *key = p->state;

+   GLuint i;

+

+   for (i = 0; i < key->unit[unit].NumArgsRGB; i++) {

+      load_texenv_source( p, key->unit[unit].OptRGB[i].Source, unit );

+   }

+

+   for (i = 0; i < key->unit[unit].NumArgsA; i++) {

+      load_texenv_source( p, key->unit[unit].OptA[i].Source, unit );

+   }

+

+   return GL_TRUE;

+}

+

+/**

+ * Generate instructions for loading bump map textures.

+ */

+static GLboolean

+load_texunit_bumpmap( struct texenv_fragment_program *p, GLuint unit )

+{

+   const struct state_key *key = p->state;

+   GLuint bumpedUnitNr = key->unit[unit].OptRGB[1].Source - SRC_TEXTURE0;

+   struct ureg texcDst, bumpMapRes;

+   struct ureg constdudvcolor = register_const4f(p, 0.0, 0.0, 0.0, 1.0);

+   struct ureg texcSrc = register_input(p, FRAG_ATTRIB_TEX0 + bumpedUnitNr);

+   struct ureg rotMat0 = register_param3( p, STATE_INTERNAL, STATE_ROT_MATRIX_0, unit );

+   struct ureg rotMat1 = register_param3( p, STATE_INTERNAL, STATE_ROT_MATRIX_1, unit );

+

+   load_texenv_source( p, unit + SRC_TEXTURE0, unit );

+

+   bumpMapRes = get_source(p, key->unit[unit].OptRGB[0].Source, unit);

+   texcDst = get_tex_temp( p );

+   p->texcoord_tex[bumpedUnitNr] = texcDst;

+

+   /* Apply rot matrix and add coords to be available in next phase.

+    * dest = (Arg0.xxxx * rotMat0 + Arg1) + (Arg0.yyyy * rotMat1)

+    * note only 2 coords are affected the rest are left unchanged (mul by 0)

+    */

+   emit_arith( p, OPCODE_MAD, texcDst, WRITEMASK_XYZW, 0,

+               swizzle1(bumpMapRes, SWIZZLE_X), rotMat0, texcSrc );

+   emit_arith( p, OPCODE_MAD, texcDst, WRITEMASK_XYZW, 0,

+               swizzle1(bumpMapRes, SWIZZLE_Y), rotMat1, texcDst );

+

+   /* Move 0,0,0,1 into bumpmap src if someone (crossbar) is foolish

+    * enough to access this later, should optimize away.

+    */

+   emit_arith( p, OPCODE_MOV, bumpMapRes, WRITEMASK_XYZW, 0,

+               constdudvcolor, undef, undef );

+

+   return GL_TRUE;

+}

+

+/**

+ * Generate a new fragment program which implements the context's

+ * current texture env/combine mode.

+ */

+static void

+create_new_program(struct gl_context *ctx, struct state_key *key,

+                   struct gl_fragment_program *program)

+{

+   struct prog_instruction instBuffer[MAX_INSTRUCTIONS];

+   struct texenv_fragment_program p;

+   GLuint unit;

+   struct ureg cf, out;

+   int i;

+

+   memset(&p, 0, sizeof(p));

+   p.state = key;

+   p.program = program;

+

+   /* During code generation, use locally-allocated instruction buffer,

+    * then alloc dynamic storage below.

+    */

+   p.program->Base.Instructions = instBuffer;

+   p.program->Base.Target = GL_FRAGMENT_PROGRAM_ARB;

+   p.program->Base.String = NULL;

+   p.program->Base.NumTexIndirections = 1; /* is this right? */

+   p.program->Base.NumTexInstructions = 0;

+   p.program->Base.NumAluInstructions = 0;

+   p.program->Base.NumInstructions = 0;

+   p.program->Base.NumTemporaries = 0;

+   p.program->Base.NumParameters = 0;

+   p.program->Base.NumAttributes = 0;

+   p.program->Base.NumAddressRegs = 0;

+   p.program->Base.Parameters = _mesa_new_parameter_list();

+   p.program->Base.InputsRead = 0x0;

+

+   if (key->num_draw_buffers == 1)

+      p.program->Base.OutputsWritten = 1 << FRAG_RESULT_COLOR;

+   else {

+      for (i = 0; i < key->num_draw_buffers; i++)

+	 p.program->Base.OutputsWritten |= (1 << (FRAG_RESULT_DATA0 + i));

+   }

+

+   for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {

+      p.src_texture[unit] = undef;

+      p.texcoord_tex[unit] = undef;

+   }

+

+   p.src_previous = undef;

+   p.half = undef;

+   p.zero = undef;

+   p.one = undef;

+

+   p.last_tex_stage = 0;

+   release_temps(ctx, &p);

+

+   if (key->enabled_units) {

+      GLboolean needbumpstage = GL_FALSE;

+

+      /* Zeroth pass - bump map textures first */

+      for (unit = 0; unit < key->nr_enabled_units; unit++)

+	 if (key->unit[unit].enabled &&

+             key->unit[unit].ModeRGB == MODE_BUMP_ENVMAP_ATI) {

+	    needbumpstage = GL_TRUE;

+	    load_texunit_bumpmap( &p, unit );

+	 }

+      if (needbumpstage)

+	 p.program->Base.NumTexIndirections++;

+

+      /* First pass - to support texture_env_crossbar, first identify

+       * all referenced texture sources and emit texld instructions

+       * for each:

+       */

+      for (unit = 0; unit < key->nr_enabled_units; unit++)

+	 if (key->unit[unit].enabled) {

+	    load_texunit_sources( &p, unit );

+	    p.last_tex_stage = unit;

+	 }

+

+      /* Second pass - emit combine instructions to build final color:

+       */

+      for (unit = 0; unit < key->nr_enabled_units; unit++)

+	 if (key->unit[unit].enabled) {

+	    p.src_previous = emit_texenv( &p, unit );

+            reserve_temp(&p, p.src_previous); /* don't re-use this temp reg */

+	    release_temps(ctx, &p);	/* release all temps */

+	 }

+   }

+

+   cf = get_source( &p, SRC_PREVIOUS, 0 );

+

+   for (i = 0; i < key->num_draw_buffers; i++) {

+      if (key->num_draw_buffers == 1)

+	 out = make_ureg( PROGRAM_OUTPUT, FRAG_RESULT_COLOR );

+      else {

+	 out = make_ureg( PROGRAM_OUTPUT, FRAG_RESULT_DATA0 + i );

+      }

+

+      if (key->separate_specular) {

+	 /* Emit specular add.

+	  */

+	 struct ureg s = register_input(&p, FRAG_ATTRIB_COL1);

+	 emit_arith( &p, OPCODE_ADD, out, WRITEMASK_XYZ, 0, cf, s, undef );

+	 emit_arith( &p, OPCODE_MOV, out, WRITEMASK_W, 0, cf, undef, undef );

+      }

+      else if (memcmp(&cf, &out, sizeof(cf)) != 0) {

+	 /* Will wind up in here if no texture enabled or a couple of

+	  * other scenarios (GL_REPLACE for instance).

+	  */

+	 emit_arith( &p, OPCODE_MOV, out, WRITEMASK_XYZW, 0, cf, undef, undef );

+      }

+   }

+   /* Finish up:

+    */

+   emit_arith( &p, OPCODE_END, undef, WRITEMASK_XYZW, 0, undef, undef, undef);

+

+   if (key->fog_enabled) {

+      /* Pull fog mode from struct gl_context, the value in the state key is

+       * a reduced value and not what is expected in FogOption

+       */

+      p.program->FogOption = ctx->Fog.Mode;

+      p.program->Base.InputsRead |= FRAG_BIT_FOGC;

+   }

+   else {

+      p.program->FogOption = GL_NONE;

+   }

+

+   if (p.program->Base.NumTexIndirections > ctx->Const.FragmentProgram.MaxTexIndirections) 

+      program_error(&p, "Exceeded max nr indirect texture lookups");

+

+   if (p.program->Base.NumTexInstructions > ctx->Const.FragmentProgram.MaxTexInstructions)

+      program_error(&p, "Exceeded max TEX instructions");

+

+   if (p.program->Base.NumAluInstructions > ctx->Const.FragmentProgram.MaxAluInstructions)

+      program_error(&p, "Exceeded max ALU instructions");

+

+   ASSERT(p.program->Base.NumInstructions <= MAX_INSTRUCTIONS);

+

+   /* Allocate final instruction array */

+   p.program->Base.Instructions

+      = _mesa_alloc_instructions(p.program->Base.NumInstructions);

+   if (!p.program->Base.Instructions) {

+      _mesa_error(ctx, GL_OUT_OF_MEMORY,

+                  "generating tex env program");

+      return;

+   }

+   _mesa_copy_instructions(p.program->Base.Instructions, instBuffer,

+                           p.program->Base.NumInstructions);

+

+   if (p.program->FogOption) {

+      _mesa_append_fog_code(ctx, p.program);

+      p.program->FogOption = GL_NONE;

+   }

+

+

+   /* Notify driver the fragment program has (actually) changed.

+    */

+   if (ctx->Driver.ProgramStringNotify) {

+      GLboolean ok = ctx->Driver.ProgramStringNotify(ctx,

+                                                     GL_FRAGMENT_PROGRAM_ARB, 

+                                                     &p.program->Base);

+      /* Driver should be able to handle any texenv programs as long as

+       * the driver correctly reported max number of texture units correctly,

+       * etc.

+       */

+      ASSERT(ok);

+      (void) ok; /* silence unused var warning */

+   }

+

+   if (DISASSEM) {

+      _mesa_print_program(&p.program->Base);

+      printf("\n");

+   }

+}

+

+

+/**

+ * Return a fragment program which implements the current

+ * fixed-function texture, fog and color-sum operations.

+ */

+struct gl_fragment_program *

+_mesa_get_fixed_func_fragment_program(struct gl_context *ctx)

+{

+   struct gl_fragment_program *prog;

+   struct state_key key;

+   GLuint keySize;

+	

+   keySize = make_state_key(ctx, &key);

+      

+   prog = (struct gl_fragment_program *)

+      _mesa_search_program_cache(ctx->FragmentProgram.Cache,

+                                 &key, keySize);

+

+   if (!prog) {

+      prog = (struct gl_fragment_program *) 

+         ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);

+

+      create_new_program(ctx, &key, prog);

+

+      _mesa_program_cache_insert(ctx, ctx->FragmentProgram.Cache,

+                                 &key, keySize, &prog->Base);

+   }

+

+   return prog;

+}