xserver and mesa git update 28-12-2010

1 files changed, 604 insertions, 604 deletions

diff --git a/mesalib/src/mesa/swrast/s_atifragshader.c b/mesalib/src/mesa/swrast/s_atifragshader.c
index 1338b6802..6019eea5e 100644
--- a/mesalib/src/mesa/swrast/s_atifragshader.c
+++ b/mesalib/src/mesa/swrast/s_atifragshader.c
@@ -1,604 +1,604 @@
-/*
- * Copyright (C) 2004  David Airlie   All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * DAVID AIRLIE 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 "main/glheader.h"
-#include "main/colormac.h"
-#include "main/macros.h"
-#include "main/atifragshader.h"
-#include "swrast/s_atifragshader.h"
-#include "swrast/s_context.h"
-
-
-/**
- * State for executing ATI fragment shader.
- */
-struct atifs_machine
-{
-   GLfloat Registers[6][4];         /** six temporary registers */
-   GLfloat PrevPassRegisters[6][4];
-   GLfloat Inputs[2][4];   /** Primary, secondary input colors */
-};
-
-
-
-/**
- * Fetch a texel.
- */
-static void
-fetch_texel(GLcontext * ctx, const GLfloat texcoord[4], GLfloat lambda,
-	    GLuint unit, GLfloat color[4])
-{
-   SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
-   /* XXX use a float-valued TextureSample routine here!!! */
-   swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current,
-                               1, (const GLfloat(*)[4]) texcoord,
-                               &lambda, (GLfloat (*)[4]) color);
-}
-
-static void
-apply_swizzle(GLfloat values[4], GLuint swizzle)
-{
-   GLfloat s, t, r, q;
-
-   s = values[0];
-   t = values[1];
-   r = values[2];
-   q = values[3];
-
-   switch (swizzle) {
-   case GL_SWIZZLE_STR_ATI:
-      values[0] = s;
-      values[1] = t;
-      values[2] = r;
-      break;
-   case GL_SWIZZLE_STQ_ATI:
-      values[0] = s;
-      values[1] = t;
-      values[2] = q;
-      break;
-   case GL_SWIZZLE_STR_DR_ATI:
-      values[0] = s / r;
-      values[1] = t / r;
-      values[2] = 1 / r;
-      break;
-   case GL_SWIZZLE_STQ_DQ_ATI:
-/* make sure q is not 0 to avoid problems later with infinite values (texture lookup)? */
-      if (q == 0.0F)
-         q = 0.000000001F;
-      values[0] = s / q;
-      values[1] = t / q;
-      values[2] = 1.0F / q;
-      break;
-   }
-   values[3] = 0.0;
-}
-
-static void
-apply_src_rep(GLint optype, GLuint rep, GLfloat * val)
-{
-   GLint i;
-   GLint start, end;
-   if (!rep)
-      return;
-
-   start = optype ? 3 : 0;
-   end = 4;
-
-   for (i = start; i < end; i++) {
-      switch (rep) {
-      case GL_RED:
-	 val[i] = val[0];
-	 break;
-      case GL_GREEN:
-	 val[i] = val[1];
-	 break;
-      case GL_BLUE:
-	 val[i] = val[2];
-	 break;
-      case GL_ALPHA:
-	 val[i] = val[3];
-	 break;
-      }
-   }
-}
-
-static void
-apply_src_mod(GLint optype, GLuint mod, GLfloat * val)
-{
-   GLint i;
-   GLint start, end;
-
-   if (!mod)
-      return;
-
-   start = optype ? 3 : 0;
-   end = 4;
-
-   for (i = start; i < end; i++) {
-      if (mod & GL_COMP_BIT_ATI)
-	 val[i] = 1 - val[i];
-
-      if (mod & GL_BIAS_BIT_ATI)
-	 val[i] = val[i] - 0.5F;
-
-      if (mod & GL_2X_BIT_ATI)
-	 val[i] = 2 * val[i];
-
-      if (mod & GL_NEGATE_BIT_ATI)
-	 val[i] = -val[i];
-   }
-}
-
-static void
-apply_dst_mod(GLuint optype, GLuint mod, GLfloat * val)
-{
-   GLint i;
-   GLint has_sat = mod & GL_SATURATE_BIT_ATI;
-   GLint start, end;
-
-   mod &= ~GL_SATURATE_BIT_ATI;
-
-   start = optype ? 3 : 0;
-   end = optype ? 4 : 3;
-
-   for (i = start; i < end; i++) {
-      switch (mod) {
-      case GL_2X_BIT_ATI:
-	 val[i] = 2 * val[i];
-	 break;
-      case GL_4X_BIT_ATI:
-	 val[i] = 4 * val[i];
-	 break;
-      case GL_8X_BIT_ATI:
-	 val[i] = 8 * val[i];
-	 break;
-      case GL_HALF_BIT_ATI:
-	 val[i] = val[i] * 0.5F;
-	 break;
-      case GL_QUARTER_BIT_ATI:
-	 val[i] = val[i] * 0.25F;
-	 break;
-      case GL_EIGHTH_BIT_ATI:
-	 val[i] = val[i] * 0.125F;
-	 break;
-      }
-
-      if (has_sat) {
-	 if (val[i] < 0.0F)
-	    val[i] = 0.0F;
-	 else if (val[i] > 1.0F)
-	    val[i] = 1.0F;
-      }
-      else {
-	 if (val[i] < -8.0F)
-	    val[i] = -8.0F;
-	 else if (val[i] > 8.0F)
-	    val[i] = 8.0F;
-      }
-   }
-}
-
-
-static void
-write_dst_addr(GLuint optype, GLuint mod, GLuint mask, GLfloat * src,
-	       GLfloat * dst)
-{
-   GLint i;
-   apply_dst_mod(optype, mod, src);
-
-   if (optype == ATI_FRAGMENT_SHADER_COLOR_OP) {
-      if (mask) {
-	 if (mask & GL_RED_BIT_ATI)
-	    dst[0] = src[0];
-
-	 if (mask & GL_GREEN_BIT_ATI)
-	    dst[1] = src[1];
-
-	 if (mask & GL_BLUE_BIT_ATI)
-	    dst[2] = src[2];
-      }
-      else {
-	 for (i = 0; i < 3; i++)
-	    dst[i] = src[i];
-      }
-   }
-   else
-      dst[3] = src[3];
-}
-
-static void
-finish_pass(struct atifs_machine *machine)
-{
-   GLint i;
-
-   for (i = 0; i < 6; i++) {
-      COPY_4V(machine->PrevPassRegisters[i], machine->Registers[i]);
-   }
-}
-
-struct ati_fs_opcode_st ati_fs_opcodes[] = {
-   {GL_ADD_ATI, 2},
-   {GL_SUB_ATI, 2},
-   {GL_MUL_ATI, 2},
-   {GL_MAD_ATI, 3},
-   {GL_LERP_ATI, 3},
-   {GL_MOV_ATI, 1},
-   {GL_CND_ATI, 3},
-   {GL_CND0_ATI, 3},
-   {GL_DOT2_ADD_ATI, 3},
-   {GL_DOT3_ATI, 2},
-   {GL_DOT4_ATI, 2}
-};
-
-
-
-static void
-handle_pass_op(struct atifs_machine *machine, struct atifs_setupinst *texinst,
-	       const SWspan *span, GLuint column, GLuint idx)
-{
-   GLuint swizzle = texinst->swizzle;
-   GLuint pass_tex = texinst->src;
-
-   if (pass_tex >= GL_TEXTURE0_ARB && pass_tex <= GL_TEXTURE7_ARB) {
-      pass_tex -= GL_TEXTURE0_ARB;
-      COPY_4V(machine->Registers[idx],
-	      span->array->attribs[FRAG_ATTRIB_TEX0 + pass_tex][column]);
-   }
-   else if (pass_tex >= GL_REG_0_ATI && pass_tex <= GL_REG_5_ATI) {
-      pass_tex -= GL_REG_0_ATI;
-      COPY_4V(machine->Registers[idx], machine->PrevPassRegisters[pass_tex]);
-   }
-   apply_swizzle(machine->Registers[idx], swizzle);
-
-}
-
-static void
-handle_sample_op(GLcontext * ctx, struct atifs_machine *machine,
-		 struct atifs_setupinst *texinst, const SWspan *span,
-		 GLuint column, GLuint idx)
-{
-/* sample from unit idx using texinst->src as coords */
-   GLuint swizzle = texinst->swizzle;
-   GLuint coord_source = texinst->src;
-   GLfloat tex_coords[4] = { 0 };
-
-   if (coord_source >= GL_TEXTURE0_ARB && coord_source <= GL_TEXTURE7_ARB) {
-      coord_source -= GL_TEXTURE0_ARB;
-      COPY_4V(tex_coords,
-              span->array->attribs[FRAG_ATTRIB_TEX0 + coord_source][column]);
-   }
-   else if (coord_source >= GL_REG_0_ATI && coord_source <= GL_REG_5_ATI) {
-      coord_source -= GL_REG_0_ATI;
-      COPY_4V(tex_coords, machine->PrevPassRegisters[coord_source]);
-   }
-   apply_swizzle(tex_coords, swizzle);
-   fetch_texel(ctx, tex_coords, 0.0F, idx, machine->Registers[idx]);
-}
-
-#define SETUP_SRC_REG(optype, i, x)		\
-do {						\
-   COPY_4V(src[optype][i], x); 			\
-} while (0)
-
-
-
-/**
- * Execute the given fragment shader.
- * NOTE: we do everything in single-precision floating point
- * \param ctx - rendering context
- * \param shader - the shader to execute
- * \param machine - virtual machine state
- * \param span - the SWspan we're operating on
- * \param column - which pixel [i] we're operating on in the span
- */
-static void
-execute_shader(GLcontext *ctx, const struct ati_fragment_shader *shader,
-	       struct atifs_machine *machine, const SWspan *span,
-               GLuint column)
-{
-   GLuint pc;
-   struct atifs_instruction *inst;
-   struct atifs_setupinst *texinst;
-   GLint optype;
-   GLuint i;
-   GLint j, pass;
-   GLint dstreg;
-   GLfloat src[2][3][4];
-   GLfloat zeros[4] = { 0.0, 0.0, 0.0, 0.0 };
-   GLfloat ones[4] = { 1.0, 1.0, 1.0, 1.0 };
-   GLfloat dst[2][4], *dstp;
-
-   for (pass = 0; pass < shader->NumPasses; pass++) {
-      if (pass > 0)
-	 finish_pass(machine);
-      for (j = 0; j < MAX_NUM_FRAGMENT_REGISTERS_ATI; j++) {
-	 texinst = &shader->SetupInst[pass][j];
-	 if (texinst->Opcode == ATI_FRAGMENT_SHADER_PASS_OP)
-	    handle_pass_op(machine, texinst, span, column, j);
-	 else if (texinst->Opcode == ATI_FRAGMENT_SHADER_SAMPLE_OP)
-	    handle_sample_op(ctx, machine, texinst, span, column, j);
-      }
-
-      for (pc = 0; pc < shader->numArithInstr[pass]; pc++) {
-	 inst = &shader->Instructions[pass][pc];
-
-	 /* setup the source registers for color and alpha ops */
-	 for (optype = 0; optype < 2; optype++) {
- 	    for (i = 0; i < inst->ArgCount[optype]; i++) {
-	       GLint index = inst->SrcReg[optype][i].Index;
-
-	       if (index >= GL_REG_0_ATI && index <= GL_REG_5_ATI)
-		  SETUP_SRC_REG(optype, i,
-				machine->Registers[index - GL_REG_0_ATI]);
-	       else if (index >= GL_CON_0_ATI && index <= GL_CON_7_ATI) {
-		  if (shader->LocalConstDef & (1 << (index - GL_CON_0_ATI))) {
-		     SETUP_SRC_REG(optype, i,
-				shader->Constants[index - GL_CON_0_ATI]);
-		  } else {
-		     SETUP_SRC_REG(optype, i,
-				ctx->ATIFragmentShader.GlobalConstants[index - GL_CON_0_ATI]);
-		  }
-	       }
-	       else if (index == GL_ONE)
-		  SETUP_SRC_REG(optype, i, ones);
-	       else if (index == GL_ZERO)
-		  SETUP_SRC_REG(optype, i, zeros);
-	       else if (index == GL_PRIMARY_COLOR_EXT)
-		  SETUP_SRC_REG(optype, i,
-				machine->Inputs[ATI_FS_INPUT_PRIMARY]);
-	       else if (index == GL_SECONDARY_INTERPOLATOR_ATI)
-		  SETUP_SRC_REG(optype, i,
-				machine->Inputs[ATI_FS_INPUT_SECONDARY]);
-
-	       apply_src_rep(optype, inst->SrcReg[optype][i].argRep,
-			     src[optype][i]);
-	       apply_src_mod(optype, inst->SrcReg[optype][i].argMod,
-			     src[optype][i]);
-	    }
-	 }
-
-	 /* Execute the operations - color then alpha */
-	 for (optype = 0; optype < 2; optype++) {
-	    if (inst->Opcode[optype]) {
-	       switch (inst->Opcode[optype]) {
-	       case GL_ADD_ATI:
-		  if (!optype)
-		     for (i = 0; i < 3; i++) {
-			dst[optype][i] =
-			   src[optype][0][i] + src[optype][1][i];
-		     }
-		  else
-		     dst[optype][3] = src[optype][0][3] + src[optype][1][3];
-		  break;
-	       case GL_SUB_ATI:
-		  if (!optype)
-		     for (i = 0; i < 3; i++) {
-			dst[optype][i] =
-			   src[optype][0][i] - src[optype][1][i];
-		     }
-		  else
-		     dst[optype][3] = src[optype][0][3] - src[optype][1][3];
-		  break;
-	       case GL_MUL_ATI:
-		  if (!optype)
-		     for (i = 0; i < 3; i++) {
-			dst[optype][i] =
-			   src[optype][0][i] * src[optype][1][i];
-		     }
-		  else
-		     dst[optype][3] = src[optype][0][3] * src[optype][1][3];
-		  break;
-	       case GL_MAD_ATI:
-		  if (!optype)
-		     for (i = 0; i < 3; i++) {
-			dst[optype][i] =
-			   src[optype][0][i] * src[optype][1][i] +
-			   src[optype][2][i];
-		     }
-		  else
-		     dst[optype][3] =
-			src[optype][0][3] * src[optype][1][3] +
-			src[optype][2][3];
-		  break;
-	       case GL_LERP_ATI:
-		  if (!optype)
-		     for (i = 0; i < 3; i++) {
-			dst[optype][i] =
-			   src[optype][0][i] * src[optype][1][i] + (1 -
-								    src
-								    [optype]
-								    [0][i]) *
-			   src[optype][2][i];
-		     }
-		  else
-		     dst[optype][3] =
-			src[optype][0][3] * src[optype][1][3] + (1 -
-								 src[optype]
-								 [0][3]) *
-			src[optype][2][3];
-		  break;
-
-	       case GL_MOV_ATI:
-		  if (!optype)
-		     for (i = 0; i < 3; i++) {
-			dst[optype][i] = src[optype][0][i];
-		     }
-		  else
-		     dst[optype][3] = src[optype][0][3];
-		  break;
-	       case GL_CND_ATI:
-		  if (!optype) {
-		     for (i = 0; i < 3; i++) {
-			dst[optype][i] =
-			   (src[optype][2][i] >
-			    0.5) ? src[optype][0][i] : src[optype][1][i];
-		     }
-		  }
-		  else {
-		     dst[optype][3] =
-			(src[optype][2][3] >
-			 0.5) ? src[optype][0][3] : src[optype][1][3];
-		  }
-		  break;
-
-	       case GL_CND0_ATI:
-		  if (!optype)
-		     for (i = 0; i < 3; i++) {
-			dst[optype][i] =
-			   (src[optype][2][i] >=
-			    0) ? src[optype][0][i] : src[optype][1][i];
-		     }
-		  else {
-		     dst[optype][3] =
-			(src[optype][2][3] >=
-			 0) ? src[optype][0][3] : src[optype][1][3];
-		  }
-		  break;
-	       case GL_DOT2_ADD_ATI:
-		  {
-		     GLfloat result;
-
-		     /* DOT 2 always uses the source from the color op */
-		     /* could save recalculation of dot products for alpha inst */
-		     result = src[0][0][0] * src[0][1][0] +
-			src[0][0][1] * src[0][1][1] + src[0][2][2];
-		     if (!optype) {
-			for (i = 0; i < 3; i++) {
-			   dst[optype][i] = result;
-			}
-		     }
-		     else
-			dst[optype][3] = result;
-		  }
-		  break;
-	       case GL_DOT3_ATI:
-		  {
-		     GLfloat result;
-
-		     /* DOT 3 always uses the source from the color op */
-		     result = src[0][0][0] * src[0][1][0] +
-			src[0][0][1] * src[0][1][1] +
-			src[0][0][2] * src[0][1][2];
-
-		     if (!optype) {
-			for (i = 0; i < 3; i++) {
-			   dst[optype][i] = result;
-			}
-		     }
-		     else
-			dst[optype][3] = result;
-		  }
-		  break;
-	       case GL_DOT4_ATI:
-		  {
-		     GLfloat result;
-
-		     /* DOT 4 always uses the source from the color op */
-		     result = src[0][0][0] * src[0][1][0] +
-			src[0][0][1] * src[0][1][1] +
-			src[0][0][2] * src[0][1][2] +
-			src[0][0][3] * src[0][1][3];
-		     if (!optype) {
-			for (i = 0; i < 3; i++) {
-			   dst[optype][i] = result;
-			}
-		     }
-		     else
-			dst[optype][3] = result;
-		  }
-		  break;
-
-	       }
-	    }
-	 }
-
-	 /* write out the destination registers */
-	 for (optype = 0; optype < 2; optype++) {
-	    if (inst->Opcode[optype]) {
-	       dstreg = inst->DstReg[optype].Index;
-	       dstp = machine->Registers[dstreg - GL_REG_0_ATI];
-
-	       if ((optype == 0) || ((inst->Opcode[1] != GL_DOT2_ADD_ATI) &&
-		  (inst->Opcode[1] != GL_DOT3_ATI) && (inst->Opcode[1] != GL_DOT4_ATI)))
-	          write_dst_addr(optype, inst->DstReg[optype].dstMod,
-			      inst->DstReg[optype].dstMask, dst[optype],
-			      dstp);
-	       else
-		  write_dst_addr(1, inst->DstReg[0].dstMod, 0, dst[1], dstp);
-	    }
-	 }
-      }
-   }
-}
-
-
-/**
- * Init fragment shader virtual machine state.
- */
-static void
-init_machine(GLcontext * ctx, struct atifs_machine *machine,
-	     const struct ati_fragment_shader *shader,
-	     const SWspan *span, GLuint col)
-{
-   GLfloat (*inputs)[4] = machine->Inputs;
-   GLint i, j;
-
-   for (i = 0; i < 6; i++) {
-      for (j = 0; j < 4; j++)
-	 machine->Registers[i][j] = 0.0;
-   }
-
-   COPY_4V(inputs[ATI_FS_INPUT_PRIMARY], span->array->attribs[FRAG_ATTRIB_COL0][col]);
-   COPY_4V(inputs[ATI_FS_INPUT_SECONDARY], span->array->attribs[FRAG_ATTRIB_COL1][col]);
-}
-
-
-
-/**
- * Execute the current ATI shader program, operating on the given span.
- */
-void
-_swrast_exec_fragment_shader(GLcontext * ctx, SWspan *span)
-{
-   const struct ati_fragment_shader *shader = ctx->ATIFragmentShader.Current;
-   struct atifs_machine machine;
-   GLuint i;
-
-   /* incoming colors should be floats */
-   ASSERT(span->array->ChanType == GL_FLOAT);
-
-   for (i = 0; i < span->end; i++) {
-      if (span->array->mask[i]) {
-	 init_machine(ctx, &machine, shader, span, i);
-
-	 execute_shader(ctx, shader, &machine, span, i);
-
-         /* store result color */
-	 {
-	    const GLfloat *colOut = machine.Registers[0];
-            /*fprintf(stderr,"outputs %f %f %f %f\n",
-              colOut[0], colOut[1], colOut[2], colOut[3]); */
-            COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0][i], colOut);
-	 }
-      }
-   }
-}
+/*

+ * Copyright (C) 2004  David Airlie   All Rights Reserved.

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is furnished to do so, subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice shall be included

+ * in all copies or substantial portions of the Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

+ * DAVID AIRLIE 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 "main/glheader.h"

+#include "main/colormac.h"

+#include "main/macros.h"

+#include "main/atifragshader.h"

+#include "swrast/s_atifragshader.h"

+#include "swrast/s_context.h"

+

+

+/**

+ * State for executing ATI fragment shader.

+ */

+struct atifs_machine

+{

+   GLfloat Registers[6][4];         /** six temporary registers */

+   GLfloat PrevPassRegisters[6][4];

+   GLfloat Inputs[2][4];   /** Primary, secondary input colors */

+};

+

+

+

+/**

+ * Fetch a texel.

+ */

+static void

+fetch_texel(struct gl_context * ctx, const GLfloat texcoord[4], GLfloat lambda,

+	    GLuint unit, GLfloat color[4])

+{

+   SWcontext *swrast = SWRAST_CONTEXT(ctx);

+

+   /* XXX use a float-valued TextureSample routine here!!! */

+   swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current,

+                               1, (const GLfloat(*)[4]) texcoord,

+                               &lambda, (GLfloat (*)[4]) color);

+}

+

+static void

+apply_swizzle(GLfloat values[4], GLuint swizzle)

+{

+   GLfloat s, t, r, q;

+

+   s = values[0];

+   t = values[1];

+   r = values[2];

+   q = values[3];

+

+   switch (swizzle) {

+   case GL_SWIZZLE_STR_ATI:

+      values[0] = s;

+      values[1] = t;

+      values[2] = r;

+      break;

+   case GL_SWIZZLE_STQ_ATI:

+      values[0] = s;

+      values[1] = t;

+      values[2] = q;

+      break;

+   case GL_SWIZZLE_STR_DR_ATI:

+      values[0] = s / r;

+      values[1] = t / r;

+      values[2] = 1 / r;

+      break;

+   case GL_SWIZZLE_STQ_DQ_ATI:

+/* make sure q is not 0 to avoid problems later with infinite values (texture lookup)? */

+      if (q == 0.0F)

+         q = 0.000000001F;

+      values[0] = s / q;

+      values[1] = t / q;

+      values[2] = 1.0F / q;

+      break;

+   }

+   values[3] = 0.0;

+}

+

+static void

+apply_src_rep(GLint optype, GLuint rep, GLfloat * val)

+{

+   GLint i;

+   GLint start, end;

+   if (!rep)

+      return;

+

+   start = optype ? 3 : 0;

+   end = 4;

+

+   for (i = start; i < end; i++) {

+      switch (rep) {

+      case GL_RED:

+	 val[i] = val[0];

+	 break;

+      case GL_GREEN:

+	 val[i] = val[1];

+	 break;

+      case GL_BLUE:

+	 val[i] = val[2];

+	 break;

+      case GL_ALPHA:

+	 val[i] = val[3];

+	 break;

+      }

+   }

+}

+

+static void

+apply_src_mod(GLint optype, GLuint mod, GLfloat * val)

+{

+   GLint i;

+   GLint start, end;

+

+   if (!mod)

+      return;

+

+   start = optype ? 3 : 0;

+   end = 4;

+

+   for (i = start; i < end; i++) {

+      if (mod & GL_COMP_BIT_ATI)

+	 val[i] = 1 - val[i];

+

+      if (mod & GL_BIAS_BIT_ATI)

+	 val[i] = val[i] - 0.5F;

+

+      if (mod & GL_2X_BIT_ATI)

+	 val[i] = 2 * val[i];

+

+      if (mod & GL_NEGATE_BIT_ATI)

+	 val[i] = -val[i];

+   }

+}

+

+static void

+apply_dst_mod(GLuint optype, GLuint mod, GLfloat * val)

+{

+   GLint i;

+   GLint has_sat = mod & GL_SATURATE_BIT_ATI;

+   GLint start, end;

+

+   mod &= ~GL_SATURATE_BIT_ATI;

+

+   start = optype ? 3 : 0;

+   end = optype ? 4 : 3;

+

+   for (i = start; i < end; i++) {

+      switch (mod) {

+      case GL_2X_BIT_ATI:

+	 val[i] = 2 * val[i];

+	 break;

+      case GL_4X_BIT_ATI:

+	 val[i] = 4 * val[i];

+	 break;

+      case GL_8X_BIT_ATI:

+	 val[i] = 8 * val[i];

+	 break;

+      case GL_HALF_BIT_ATI:

+	 val[i] = val[i] * 0.5F;

+	 break;

+      case GL_QUARTER_BIT_ATI:

+	 val[i] = val[i] * 0.25F;

+	 break;

+      case GL_EIGHTH_BIT_ATI:

+	 val[i] = val[i] * 0.125F;

+	 break;

+      }

+

+      if (has_sat) {

+	 if (val[i] < 0.0F)

+	    val[i] = 0.0F;

+	 else if (val[i] > 1.0F)

+	    val[i] = 1.0F;

+      }

+      else {

+	 if (val[i] < -8.0F)

+	    val[i] = -8.0F;

+	 else if (val[i] > 8.0F)

+	    val[i] = 8.0F;

+      }

+   }

+}

+

+

+static void

+write_dst_addr(GLuint optype, GLuint mod, GLuint mask, GLfloat * src,

+	       GLfloat * dst)

+{

+   GLint i;

+   apply_dst_mod(optype, mod, src);

+

+   if (optype == ATI_FRAGMENT_SHADER_COLOR_OP) {

+      if (mask) {

+	 if (mask & GL_RED_BIT_ATI)

+	    dst[0] = src[0];

+

+	 if (mask & GL_GREEN_BIT_ATI)

+	    dst[1] = src[1];

+

+	 if (mask & GL_BLUE_BIT_ATI)

+	    dst[2] = src[2];

+      }

+      else {

+	 for (i = 0; i < 3; i++)

+	    dst[i] = src[i];

+      }

+   }

+   else

+      dst[3] = src[3];

+}

+

+static void

+finish_pass(struct atifs_machine *machine)

+{

+   GLint i;

+

+   for (i = 0; i < 6; i++) {

+      COPY_4V(machine->PrevPassRegisters[i], machine->Registers[i]);

+   }

+}

+

+struct ati_fs_opcode_st ati_fs_opcodes[] = {

+   {GL_ADD_ATI, 2},

+   {GL_SUB_ATI, 2},

+   {GL_MUL_ATI, 2},

+   {GL_MAD_ATI, 3},

+   {GL_LERP_ATI, 3},

+   {GL_MOV_ATI, 1},

+   {GL_CND_ATI, 3},

+   {GL_CND0_ATI, 3},

+   {GL_DOT2_ADD_ATI, 3},

+   {GL_DOT3_ATI, 2},

+   {GL_DOT4_ATI, 2}

+};

+

+

+

+static void

+handle_pass_op(struct atifs_machine *machine, struct atifs_setupinst *texinst,

+	       const SWspan *span, GLuint column, GLuint idx)

+{

+   GLuint swizzle = texinst->swizzle;

+   GLuint pass_tex = texinst->src;

+

+   if (pass_tex >= GL_TEXTURE0_ARB && pass_tex <= GL_TEXTURE7_ARB) {

+      pass_tex -= GL_TEXTURE0_ARB;

+      COPY_4V(machine->Registers[idx],

+	      span->array->attribs[FRAG_ATTRIB_TEX0 + pass_tex][column]);

+   }

+   else if (pass_tex >= GL_REG_0_ATI && pass_tex <= GL_REG_5_ATI) {

+      pass_tex -= GL_REG_0_ATI;

+      COPY_4V(machine->Registers[idx], machine->PrevPassRegisters[pass_tex]);

+   }

+   apply_swizzle(machine->Registers[idx], swizzle);

+

+}

+

+static void

+handle_sample_op(struct gl_context * ctx, struct atifs_machine *machine,

+		 struct atifs_setupinst *texinst, const SWspan *span,

+		 GLuint column, GLuint idx)

+{

+/* sample from unit idx using texinst->src as coords */

+   GLuint swizzle = texinst->swizzle;

+   GLuint coord_source = texinst->src;

+   GLfloat tex_coords[4] = { 0 };

+

+   if (coord_source >= GL_TEXTURE0_ARB && coord_source <= GL_TEXTURE7_ARB) {

+      coord_source -= GL_TEXTURE0_ARB;

+      COPY_4V(tex_coords,

+              span->array->attribs[FRAG_ATTRIB_TEX0 + coord_source][column]);

+   }

+   else if (coord_source >= GL_REG_0_ATI && coord_source <= GL_REG_5_ATI) {

+      coord_source -= GL_REG_0_ATI;

+      COPY_4V(tex_coords, machine->PrevPassRegisters[coord_source]);

+   }

+   apply_swizzle(tex_coords, swizzle);

+   fetch_texel(ctx, tex_coords, 0.0F, idx, machine->Registers[idx]);

+}

+

+#define SETUP_SRC_REG(optype, i, x)		\

+do {						\

+   COPY_4V(src[optype][i], x); 			\

+} while (0)

+

+

+

+/**

+ * Execute the given fragment shader.

+ * NOTE: we do everything in single-precision floating point

+ * \param ctx - rendering context

+ * \param shader - the shader to execute

+ * \param machine - virtual machine state

+ * \param span - the SWspan we're operating on

+ * \param column - which pixel [i] we're operating on in the span

+ */

+static void

+execute_shader(struct gl_context *ctx, const struct ati_fragment_shader *shader,

+	       struct atifs_machine *machine, const SWspan *span,

+               GLuint column)

+{

+   GLuint pc;

+   struct atifs_instruction *inst;

+   struct atifs_setupinst *texinst;

+   GLint optype;

+   GLuint i;

+   GLint j, pass;

+   GLint dstreg;

+   GLfloat src[2][3][4];

+   GLfloat zeros[4] = { 0.0, 0.0, 0.0, 0.0 };

+   GLfloat ones[4] = { 1.0, 1.0, 1.0, 1.0 };

+   GLfloat dst[2][4], *dstp;

+

+   for (pass = 0; pass < shader->NumPasses; pass++) {

+      if (pass > 0)

+	 finish_pass(machine);

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

+	 texinst = &shader->SetupInst[pass][j];

+	 if (texinst->Opcode == ATI_FRAGMENT_SHADER_PASS_OP)

+	    handle_pass_op(machine, texinst, span, column, j);

+	 else if (texinst->Opcode == ATI_FRAGMENT_SHADER_SAMPLE_OP)

+	    handle_sample_op(ctx, machine, texinst, span, column, j);

+      }

+

+      for (pc = 0; pc < shader->numArithInstr[pass]; pc++) {

+	 inst = &shader->Instructions[pass][pc];

+

+	 /* setup the source registers for color and alpha ops */

+	 for (optype = 0; optype < 2; optype++) {

+ 	    for (i = 0; i < inst->ArgCount[optype]; i++) {

+	       GLint index = inst->SrcReg[optype][i].Index;

+

+	       if (index >= GL_REG_0_ATI && index <= GL_REG_5_ATI)

+		  SETUP_SRC_REG(optype, i,

+				machine->Registers[index - GL_REG_0_ATI]);

+	       else if (index >= GL_CON_0_ATI && index <= GL_CON_7_ATI) {

+		  if (shader->LocalConstDef & (1 << (index - GL_CON_0_ATI))) {

+		     SETUP_SRC_REG(optype, i,

+				shader->Constants[index - GL_CON_0_ATI]);

+		  } else {

+		     SETUP_SRC_REG(optype, i,

+				ctx->ATIFragmentShader.GlobalConstants[index - GL_CON_0_ATI]);

+		  }

+	       }

+	       else if (index == GL_ONE)

+		  SETUP_SRC_REG(optype, i, ones);

+	       else if (index == GL_ZERO)

+		  SETUP_SRC_REG(optype, i, zeros);

+	       else if (index == GL_PRIMARY_COLOR_EXT)

+		  SETUP_SRC_REG(optype, i,

+				machine->Inputs[ATI_FS_INPUT_PRIMARY]);

+	       else if (index == GL_SECONDARY_INTERPOLATOR_ATI)

+		  SETUP_SRC_REG(optype, i,

+				machine->Inputs[ATI_FS_INPUT_SECONDARY]);

+

+	       apply_src_rep(optype, inst->SrcReg[optype][i].argRep,

+			     src[optype][i]);

+	       apply_src_mod(optype, inst->SrcReg[optype][i].argMod,

+			     src[optype][i]);

+	    }

+	 }

+

+	 /* Execute the operations - color then alpha */

+	 for (optype = 0; optype < 2; optype++) {

+	    if (inst->Opcode[optype]) {

+	       switch (inst->Opcode[optype]) {

+	       case GL_ADD_ATI:

+		  if (!optype)

+		     for (i = 0; i < 3; i++) {

+			dst[optype][i] =

+			   src[optype][0][i] + src[optype][1][i];

+		     }

+		  else

+		     dst[optype][3] = src[optype][0][3] + src[optype][1][3];

+		  break;

+	       case GL_SUB_ATI:

+		  if (!optype)

+		     for (i = 0; i < 3; i++) {

+			dst[optype][i] =

+			   src[optype][0][i] - src[optype][1][i];

+		     }

+		  else

+		     dst[optype][3] = src[optype][0][3] - src[optype][1][3];

+		  break;

+	       case GL_MUL_ATI:

+		  if (!optype)

+		     for (i = 0; i < 3; i++) {

+			dst[optype][i] =

+			   src[optype][0][i] * src[optype][1][i];

+		     }

+		  else

+		     dst[optype][3] = src[optype][0][3] * src[optype][1][3];

+		  break;

+	       case GL_MAD_ATI:

+		  if (!optype)

+		     for (i = 0; i < 3; i++) {

+			dst[optype][i] =

+			   src[optype][0][i] * src[optype][1][i] +

+			   src[optype][2][i];

+		     }

+		  else

+		     dst[optype][3] =

+			src[optype][0][3] * src[optype][1][3] +

+			src[optype][2][3];

+		  break;

+	       case GL_LERP_ATI:

+		  if (!optype)

+		     for (i = 0; i < 3; i++) {

+			dst[optype][i] =

+			   src[optype][0][i] * src[optype][1][i] + (1 -

+								    src

+								    [optype]

+								    [0][i]) *

+			   src[optype][2][i];

+		     }

+		  else

+		     dst[optype][3] =

+			src[optype][0][3] * src[optype][1][3] + (1 -

+								 src[optype]

+								 [0][3]) *

+			src[optype][2][3];

+		  break;

+

+	       case GL_MOV_ATI:

+		  if (!optype)

+		     for (i = 0; i < 3; i++) {

+			dst[optype][i] = src[optype][0][i];

+		     }

+		  else

+		     dst[optype][3] = src[optype][0][3];

+		  break;

+	       case GL_CND_ATI:

+		  if (!optype) {

+		     for (i = 0; i < 3; i++) {

+			dst[optype][i] =

+			   (src[optype][2][i] >

+			    0.5) ? src[optype][0][i] : src[optype][1][i];

+		     }

+		  }

+		  else {

+		     dst[optype][3] =

+			(src[optype][2][3] >

+			 0.5) ? src[optype][0][3] : src[optype][1][3];

+		  }

+		  break;

+

+	       case GL_CND0_ATI:

+		  if (!optype)

+		     for (i = 0; i < 3; i++) {

+			dst[optype][i] =

+			   (src[optype][2][i] >=

+			    0) ? src[optype][0][i] : src[optype][1][i];

+		     }

+		  else {

+		     dst[optype][3] =

+			(src[optype][2][3] >=

+			 0) ? src[optype][0][3] : src[optype][1][3];

+		  }

+		  break;

+	       case GL_DOT2_ADD_ATI:

+		  {

+		     GLfloat result;

+

+		     /* DOT 2 always uses the source from the color op */

+		     /* could save recalculation of dot products for alpha inst */

+		     result = src[0][0][0] * src[0][1][0] +

+			src[0][0][1] * src[0][1][1] + src[0][2][2];

+		     if (!optype) {

+			for (i = 0; i < 3; i++) {

+			   dst[optype][i] = result;

+			}

+		     }

+		     else

+			dst[optype][3] = result;

+		  }

+		  break;

+	       case GL_DOT3_ATI:

+		  {

+		     GLfloat result;

+

+		     /* DOT 3 always uses the source from the color op */

+		     result = src[0][0][0] * src[0][1][0] +

+			src[0][0][1] * src[0][1][1] +

+			src[0][0][2] * src[0][1][2];

+

+		     if (!optype) {

+			for (i = 0; i < 3; i++) {

+			   dst[optype][i] = result;

+			}

+		     }

+		     else

+			dst[optype][3] = result;

+		  }

+		  break;

+	       case GL_DOT4_ATI:

+		  {

+		     GLfloat result;

+

+		     /* DOT 4 always uses the source from the color op */

+		     result = src[0][0][0] * src[0][1][0] +

+			src[0][0][1] * src[0][1][1] +

+			src[0][0][2] * src[0][1][2] +

+			src[0][0][3] * src[0][1][3];

+		     if (!optype) {

+			for (i = 0; i < 3; i++) {

+			   dst[optype][i] = result;

+			}

+		     }

+		     else

+			dst[optype][3] = result;

+		  }

+		  break;

+

+	       }

+	    }

+	 }

+

+	 /* write out the destination registers */

+	 for (optype = 0; optype < 2; optype++) {

+	    if (inst->Opcode[optype]) {

+	       dstreg = inst->DstReg[optype].Index;

+	       dstp = machine->Registers[dstreg - GL_REG_0_ATI];

+

+	       if ((optype == 0) || ((inst->Opcode[1] != GL_DOT2_ADD_ATI) &&

+		  (inst->Opcode[1] != GL_DOT3_ATI) && (inst->Opcode[1] != GL_DOT4_ATI)))

+	          write_dst_addr(optype, inst->DstReg[optype].dstMod,

+			      inst->DstReg[optype].dstMask, dst[optype],

+			      dstp);

+	       else

+		  write_dst_addr(1, inst->DstReg[0].dstMod, 0, dst[1], dstp);

+	    }

+	 }

+      }

+   }

+}

+

+

+/**

+ * Init fragment shader virtual machine state.

+ */

+static void

+init_machine(struct gl_context * ctx, struct atifs_machine *machine,

+	     const struct ati_fragment_shader *shader,

+	     const SWspan *span, GLuint col)

+{

+   GLfloat (*inputs)[4] = machine->Inputs;

+   GLint i, j;

+

+   for (i = 0; i < 6; i++) {

+      for (j = 0; j < 4; j++)

+	 machine->Registers[i][j] = 0.0;

+   }

+

+   COPY_4V(inputs[ATI_FS_INPUT_PRIMARY], span->array->attribs[FRAG_ATTRIB_COL0][col]);

+   COPY_4V(inputs[ATI_FS_INPUT_SECONDARY], span->array->attribs[FRAG_ATTRIB_COL1][col]);

+}

+

+

+

+/**

+ * Execute the current ATI shader program, operating on the given span.

+ */

+void

+_swrast_exec_fragment_shader(struct gl_context * ctx, SWspan *span)

+{

+   const struct ati_fragment_shader *shader = ctx->ATIFragmentShader.Current;

+   struct atifs_machine machine;

+   GLuint i;

+

+   /* incoming colors should be floats */

+   ASSERT(span->array->ChanType == GL_FLOAT);

+

+   for (i = 0; i < span->end; i++) {

+      if (span->array->mask[i]) {

+	 init_machine(ctx, &machine, shader, span, i);

+

+	 execute_shader(ctx, shader, &machine, span, i);

+

+         /* store result color */

+	 {

+	    const GLfloat *colOut = machine.Registers[0];

+            /*fprintf(stderr,"outputs %f %f %f %f\n",

+              colOut[0], colOut[1], colOut[2], colOut[3]); */

+            COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0][i], colOut);

+	 }

+      }

+   }

+}