Added MesaLib-7.6

1 files changed, 563 insertions, 0 deletions

diff --git a/mesalib/src/mesa/tnl/t_vb_program.c b/mesalib/src/mesa/tnl/t_vb_program.c
new file mode 100644
index 000000000..dc954bcba
--- /dev/null
+++ b/mesalib/src/mesa/tnl/t_vb_program.c
@@ -0,0 +1,563 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.6
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (C) 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, 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
+ * BRIAN PAUL 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.
+ */
+
+
+/**
+ * \file tnl/t_vb_program.c
+ * \brief Pipeline stage for executing vertex programs.
+ * \author Brian Paul,  Keith Whitwell
+ */
+
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/context.h"
+#include "main/macros.h"
+#include "main/imports.h"
+#include "shader/prog_instruction.h"
+#include "shader/prog_statevars.h"
+#include "shader/prog_execute.h"
+#include "swrast/s_context.h"
+#include "swrast/s_texfilter.h"
+
+#include "tnl/tnl.h"
+#include "tnl/t_context.h"
+#include "tnl/t_pipeline.h"
+
+
+#ifdef NAN_CHECK
+/** Check for NaNs and very large values */
+static INLINE void
+check_float(float x)
+{
+   assert(!IS_INF_OR_NAN(x));
+   assert(1.0e-15 <= x && x <= 1.0e15);
+}
+#endif
+
+
+/*!
+ * Private storage for the vertex program pipeline stage.
+ */
+struct vp_stage_data {
+   /** The results of running the vertex program go into these arrays. */
+   GLvector4f results[VERT_RESULT_MAX];
+
+   GLvector4f ndcCoords;              /**< normalized device coords */
+   GLubyte *clipmask;                 /**< clip flags */
+   GLubyte ormask, andmask;           /**< for clipping */
+};
+
+
+#define VP_STAGE_DATA(stage) ((struct vp_stage_data *)(stage->privatePtr))
+
+
+static void
+userclip( GLcontext *ctx,
+          GLvector4f *clip,
+          GLubyte *clipmask,
+          GLubyte *clipormask,
+          GLubyte *clipandmask )
+{
+   GLuint p;
+
+   for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
+      if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
+	 GLuint nr, i;
+	 const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
+	 const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
+	 const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
+	 const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
+         GLfloat *coord = (GLfloat *)clip->data;
+         GLuint stride = clip->stride;
+         GLuint count = clip->count;
+
+	 for (nr = 0, i = 0 ; i < count ; i++) {
+	    GLfloat dp = (coord[0] * a + 
+			  coord[1] * b +
+			  coord[2] * c +
+			  coord[3] * d);
+
+	    if (dp < 0) {
+	       nr++;
+	       clipmask[i] |= CLIP_USER_BIT;
+	    }
+
+	    STRIDE_F(coord, stride);
+	 }
+
+	 if (nr > 0) {
+	    *clipormask |= CLIP_USER_BIT;
+	    if (nr == count) {
+	       *clipandmask |= CLIP_USER_BIT;
+	       return;
+	    }
+	 }
+      }
+   }
+}
+
+
+static GLboolean
+do_ndc_cliptest(GLcontext *ctx, struct vp_stage_data *store)
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct vertex_buffer *VB = &tnl->vb;
+   /* Cliptest and perspective divide.  Clip functions must clear
+    * the clipmask.
+    */
+   store->ormask = 0;
+   store->andmask = CLIP_FRUSTUM_BITS;
+
+   if (tnl->NeedNdcCoords) {
+      VB->NdcPtr =
+         _mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr,
+                                            &store->ndcCoords,
+                                            store->clipmask,
+                                            &store->ormask,
+                                            &store->andmask );
+   }
+   else {
+      VB->NdcPtr = NULL;
+      _mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr,
+                                            NULL,
+                                            store->clipmask,
+                                            &store->ormask,
+                                            &store->andmask );
+   }
+
+   if (store->andmask) {
+      /* All vertices are outside the frustum */
+      return GL_FALSE;
+   }
+
+   /* Test userclip planes.  This contributes to VB->ClipMask.
+    */
+   /** XXX NEW_SLANG _Enabled ??? */
+   if (ctx->Transform.ClipPlanesEnabled && (!ctx->VertexProgram._Enabled ||
+      ctx->VertexProgram.Current->IsPositionInvariant)) {
+      userclip( ctx,
+		VB->ClipPtr,
+		store->clipmask,
+		&store->ormask,
+		&store->andmask );
+
+      if (store->andmask) {
+	 return GL_FALSE;
+      }
+   }
+
+   VB->ClipAndMask = store->andmask;
+   VB->ClipOrMask = store->ormask;
+   VB->ClipMask = store->clipmask;
+
+   return GL_TRUE;
+}
+
+
+/**
+ * XXX the texture sampling code in this module is a bit of a hack.
+ * The texture sampling code is in swrast, though it doesn't have any
+ * real dependencies on the rest of swrast.  It should probably be
+ * moved into main/ someday.
+ */
+static void
+vp_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);
+}
+
+
+/**
+ * Called via ctx->Driver.ProgramStringNotify() after a new vertex program
+ * string has been parsed.
+ */
+void
+_tnl_program_string(GLcontext *ctx, GLenum target, struct gl_program *program)
+{
+   /* No-op.
+    * If we had derived anything from the program that was private to this
+    * stage we'd recompute/validate it here.
+    */
+}
+
+
+/**
+ * Initialize virtual machine state prior to executing vertex program.
+ */
+static void
+init_machine(GLcontext *ctx, struct gl_program_machine *machine)
+{
+   /* Input registers get initialized from the current vertex attribs */
+   MEMCPY(machine->VertAttribs, ctx->Current.Attrib,
+          MAX_VERTEX_GENERIC_ATTRIBS * 4 * sizeof(GLfloat));
+
+   if (ctx->VertexProgram._Current->IsNVProgram) {
+      GLuint i;
+      /* Output/result regs are initialized to [0,0,0,1] */
+      for (i = 0; i < MAX_NV_VERTEX_PROGRAM_OUTPUTS; i++) {
+         ASSIGN_4V(machine->Outputs[i], 0.0F, 0.0F, 0.0F, 1.0F);
+      }
+      /* Temp regs are initialized to [0,0,0,0] */
+      for (i = 0; i < MAX_NV_VERTEX_PROGRAM_TEMPS; i++) {
+         ASSIGN_4V(machine->Temporaries[i], 0.0F, 0.0F, 0.0F, 0.0F);
+      }
+      for (i = 0; i < MAX_VERTEX_PROGRAM_ADDRESS_REGS; i++) {
+         ASSIGN_4V(machine->AddressReg[i], 0, 0, 0, 0);
+      }
+   }
+
+   machine->NumDeriv = 0;
+
+   /* init condition codes */
+   machine->CondCodes[0] = COND_EQ;
+   machine->CondCodes[1] = COND_EQ;
+   machine->CondCodes[2] = COND_EQ;
+   machine->CondCodes[3] = COND_EQ;
+
+   /* init call stack */
+   machine->StackDepth = 0;
+
+   machine->FetchTexelLod = vp_fetch_texel;
+   machine->FetchTexelDeriv = NULL; /* not used by vertex programs */
+
+   machine->Samplers = ctx->VertexProgram._Current->Base.SamplerUnits;
+}
+
+
+/**
+ * Map the texture images which the vertex program will access (if any).
+ */
+static void
+map_textures(GLcontext *ctx, const struct gl_vertex_program *vp)
+{
+   GLuint u;
+
+   if (!ctx->Driver.MapTexture)
+      return;
+
+   for (u = 0; u < ctx->Const.MaxVertexTextureImageUnits; u++) {
+      if (vp->Base.TexturesUsed[u]) {
+         /* Note: _Current *should* correspond to the target indicated
+          * in TexturesUsed[u].
+          */
+         ctx->Driver.MapTexture(ctx, ctx->Texture.Unit[u]._Current);
+      }
+   }
+}
+
+
+/**
+ * Unmap the texture images which were used by the vertex program (if any).
+ */
+static void
+unmap_textures(GLcontext *ctx, const struct gl_vertex_program *vp)
+{
+   GLuint u;
+
+   if (!ctx->Driver.MapTexture)
+      return;
+
+   for (u = 0; u < ctx->Const.MaxVertexTextureImageUnits; u++) {
+      if (vp->Base.TexturesUsed[u]) {
+         /* Note: _Current *should* correspond to the target indicated
+          * in TexturesUsed[u].
+          */
+         ctx->Driver.UnmapTexture(ctx, ctx->Texture.Unit[u]._Current);
+      }
+   }
+}
+
+
+/**
+ * This function executes vertex programs
+ */
+static GLboolean
+run_vp( GLcontext *ctx, struct tnl_pipeline_stage *stage )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct vp_stage_data *store = VP_STAGE_DATA(stage);
+   struct vertex_buffer *VB = &tnl->vb;
+   struct gl_vertex_program *program = ctx->VertexProgram._Current;
+   struct gl_program_machine machine;
+   GLuint outputs[VERT_RESULT_MAX], numOutputs;
+   GLuint i, j;
+
+   if (!program)
+      return GL_TRUE;
+
+   if (program->IsNVProgram) {
+      _mesa_load_tracked_matrices(ctx);
+   }
+   else {
+      /* ARB program or vertex shader */
+      _mesa_load_state_parameters(ctx, program->Base.Parameters);
+   }
+
+   /* make list of outputs to save some time below */
+   numOutputs = 0;
+   for (i = 0; i < VERT_RESULT_MAX; i++) {
+      if (program->Base.OutputsWritten & (1 << i)) {
+         outputs[numOutputs++] = i;
+      }
+   }
+
+   map_textures(ctx, program);
+
+   for (i = 0; i < VB->Count; i++) {
+      GLuint attr;
+
+      init_machine(ctx, &machine);
+
+#if 0
+      printf("Input  %d: %f, %f, %f, %f\n", i,
+             VB->AttribPtr[0]->data[i][0],
+             VB->AttribPtr[0]->data[i][1],
+             VB->AttribPtr[0]->data[i][2],
+             VB->AttribPtr[0]->data[i][3]);
+      printf("   color: %f, %f, %f, %f\n",
+             VB->AttribPtr[3]->data[i][0],
+             VB->AttribPtr[3]->data[i][1],
+             VB->AttribPtr[3]->data[i][2],
+             VB->AttribPtr[3]->data[i][3]);
+      printf("  normal: %f, %f, %f, %f\n",
+             VB->AttribPtr[2]->data[i][0],
+             VB->AttribPtr[2]->data[i][1],
+             VB->AttribPtr[2]->data[i][2],
+             VB->AttribPtr[2]->data[i][3]);
+#endif
+
+      /* the vertex array case */
+      for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
+	 if (program->Base.InputsRead & (1 << attr)) {
+	    const GLubyte *ptr = (const GLubyte*) VB->AttribPtr[attr]->data;
+	    const GLuint size = VB->AttribPtr[attr]->size;
+	    const GLuint stride = VB->AttribPtr[attr]->stride;
+	    const GLfloat *data = (GLfloat *) (ptr + stride * i);
+#ifdef NAN_CHECK
+            check_float(data[0]);
+            check_float(data[1]);
+            check_float(data[2]);
+            check_float(data[3]);
+#endif
+	    COPY_CLEAN_4V(machine.VertAttribs[attr], size, data);
+	 }
+      }
+
+      /* execute the program */
+      _mesa_execute_program(ctx, &program->Base, &machine);
+
+      /* copy the output registers into the VB->attribs arrays */
+      for (j = 0; j < numOutputs; j++) {
+         const GLuint attr = outputs[j];
+#ifdef NAN_CHECK
+         check_float(machine.Outputs[attr][0]);
+         check_float(machine.Outputs[attr][1]);
+         check_float(machine.Outputs[attr][2]);
+         check_float(machine.Outputs[attr][3]);
+#endif
+         COPY_4V(store->results[attr].data[i], machine.Outputs[attr]);
+      }
+#ifdef NAN_CHECK
+      ASSERT(machine.Outputs[0][3] != 0.0F);
+#endif
+#if 0
+      printf("HPOS: %f %f %f %f\n",
+             machine.Outputs[0][0], 
+             machine.Outputs[0][1], 
+             machine.Outputs[0][2], 
+             machine.Outputs[0][3]);
+#endif
+   }
+
+   unmap_textures(ctx, program);
+
+   /* Fixup fog and point size results if needed */
+   if (program->IsNVProgram) {
+      if (ctx->Fog.Enabled &&
+          (program->Base.OutputsWritten & (1 << VERT_RESULT_FOGC)) == 0) {
+         for (i = 0; i < VB->Count; i++) {
+            store->results[VERT_RESULT_FOGC].data[i][0] = 1.0;
+         }
+      }
+
+      if (ctx->VertexProgram.PointSizeEnabled &&
+          (program->Base.OutputsWritten & (1 << VERT_RESULT_PSIZ)) == 0) {
+         for (i = 0; i < VB->Count; i++) {
+            store->results[VERT_RESULT_PSIZ].data[i][0] = ctx->Point.Size;
+         }
+      }
+   }
+
+   if (program->IsPositionInvariant) {
+      /* We need the exact same transform as in the fixed function path here
+       * to guarantee invariance, depending on compiler optimization flags
+       * results could be different otherwise.
+       */
+      VB->ClipPtr = TransformRaw( &store->results[0],
+				  &ctx->_ModelProjectMatrix,
+				  VB->AttribPtr[0] );
+
+      /* Drivers expect this to be clean to element 4...
+       */
+      switch (VB->ClipPtr->size) {
+      case 1:
+	 /* impossible */
+      case 2:
+	 _mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 2 );
+	 /* fall-through */
+      case 3:
+	 _mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 3 );
+	 /* fall-through */
+      case 4:
+	 break;
+      }
+   }
+   else {
+      /* Setup the VB pointers so that the next pipeline stages get
+       * their data from the right place (the program output arrays).
+       */
+      VB->ClipPtr = &store->results[VERT_RESULT_HPOS];
+      VB->ClipPtr->size = 4;
+      VB->ClipPtr->count = VB->Count;
+   }
+
+   VB->ColorPtr[0] = &store->results[VERT_RESULT_COL0];
+   VB->ColorPtr[1] = &store->results[VERT_RESULT_BFC0];
+   VB->SecondaryColorPtr[0] = &store->results[VERT_RESULT_COL1];
+   VB->SecondaryColorPtr[1] = &store->results[VERT_RESULT_BFC1];
+   VB->FogCoordPtr = &store->results[VERT_RESULT_FOGC];
+
+   VB->AttribPtr[VERT_ATTRIB_COLOR0] = &store->results[VERT_RESULT_COL0];
+   VB->AttribPtr[VERT_ATTRIB_COLOR1] = &store->results[VERT_RESULT_COL1];
+   VB->AttribPtr[VERT_ATTRIB_FOG] = &store->results[VERT_RESULT_FOGC];
+   VB->AttribPtr[_TNL_ATTRIB_POINTSIZE] = &store->results[VERT_RESULT_PSIZ];
+
+   for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
+      VB->TexCoordPtr[i] = 
+      VB->AttribPtr[_TNL_ATTRIB_TEX0 + i]
+         = &store->results[VERT_RESULT_TEX0 + i];
+   }
+
+   for (i = 0; i < ctx->Const.MaxVarying; i++) {
+      if (program->Base.OutputsWritten & (1 << (VERT_RESULT_VAR0 + i))) {
+         /* Note: varying results get put into the generic attributes */
+	 VB->AttribPtr[VERT_ATTRIB_GENERIC0+i]
+            = &store->results[VERT_RESULT_VAR0 + i];
+      }
+   }
+
+
+   /* Perform NDC and cliptest operations:
+    */
+   return do_ndc_cliptest(ctx, store);
+}
+
+
+/**
+ * Called the first time stage->run is called.  In effect, don't
+ * allocate data until the first time the stage is run.
+ */
+static GLboolean
+init_vp(GLcontext *ctx, struct tnl_pipeline_stage *stage)
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct vertex_buffer *VB = &(tnl->vb);
+   struct vp_stage_data *store;
+   const GLuint size = VB->Size;
+   GLuint i;
+
+   stage->privatePtr = MALLOC(sizeof(*store));
+   store = VP_STAGE_DATA(stage);
+   if (!store)
+      return GL_FALSE;
+
+   /* Allocate arrays of vertex output values */
+   for (i = 0; i < VERT_RESULT_MAX; i++) {
+      _mesa_vector4f_alloc( &store->results[i], 0, size, 32 );
+      store->results[i].size = 4;
+   }
+
+   /* a few other misc allocations */
+   _mesa_vector4f_alloc( &store->ndcCoords, 0, size, 32 );
+   store->clipmask = (GLubyte *) ALIGN_MALLOC(sizeof(GLubyte)*size, 32 );
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Destructor for this pipeline stage.
+ */
+static void
+dtr(struct tnl_pipeline_stage *stage)
+{
+   struct vp_stage_data *store = VP_STAGE_DATA(stage);
+
+   if (store) {
+      GLuint i;
+
+      /* free the vertex program result arrays */
+      for (i = 0; i < VERT_RESULT_MAX; i++)
+         _mesa_vector4f_free( &store->results[i] );
+
+      /* free misc arrays */
+      _mesa_vector4f_free( &store->ndcCoords );
+      ALIGN_FREE( store->clipmask );
+
+      FREE( store );
+      stage->privatePtr = NULL;
+   }
+}
+
+
+static void
+validate_vp_stage(GLcontext *ctx, struct tnl_pipeline_stage *stage)
+{
+   if (ctx->VertexProgram._Current) {
+      _swrast_update_texture_samplers(ctx);
+   }
+}
+
+
+
+/**
+ * Public description of this pipeline stage.
+ */
+const struct tnl_pipeline_stage _tnl_vertex_program_stage =
+{
+   "vertex-program",
+   NULL,			/* private_data */
+   init_vp,			/* create */
+   dtr,				/* destroy */
+   validate_vp_stage, 		/* validate */
+   run_vp			/* run -- initially set to ctr */
+};