diff options
Diffstat (limited to 'mesalib/src/mesa/tnl/t_vb_program.c')
| -rw-r--r-- | mesalib/src/mesa/tnl/t_vb_program.c | 1146 |
1 files changed, 572 insertions, 574 deletions
diff --git a/mesalib/src/mesa/tnl/t_vb_program.c b/mesalib/src/mesa/tnl/t_vb_program.c index 4b1a212fd..cc5e85634 100644 --- a/mesalib/src/mesa/tnl/t_vb_program.c +++ b/mesalib/src/mesa/tnl/t_vb_program.c @@ -1,574 +1,572 @@ -/*
- * 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/macros.h"
-#include "main/imports.h"
-#include "math/m_xform.h"
-#include "program/prog_instruction.h"
-#include "program/prog_statevars.h"
-#include "program/prog_execute.h"
-#include "swrast/s_context.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 */
-
- struct gl_program_machine machine;
-};
-
-
-#define VP_STAGE_DATA(stage) ((struct vp_stage_data *)(stage->privatePtr))
-
-
-static void
-userclip( struct gl_context *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(struct gl_context *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;
-
- tnl_clip_prepare(ctx);
-
- if (tnl->NeedNdcCoords) {
- VB->NdcPtr =
- _mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr,
- &store->ndcCoords,
- store->clipmask,
- &store->ormask,
- &store->andmask,
- !ctx->Transform.DepthClamp );
- }
- else {
- VB->NdcPtr = NULL;
- _mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr,
- NULL,
- store->clipmask,
- &store->ormask,
- &store->andmask,
- !ctx->Transform.DepthClamp );
- }
-
- 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(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);
-}
-
-
-/**
- * Called via ctx->Driver.ProgramStringNotify() after a new vertex program
- * string has been parsed.
- */
-GLboolean
-_tnl_program_string(struct gl_context *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.
- */
- return GL_TRUE;
-}
-
-
-/**
- * Initialize virtual machine state prior to executing vertex program.
- */
-static void
-init_machine(struct gl_context *ctx, struct gl_program_machine *machine,
- GLuint instID)
-{
- /* 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;
-
- machine->SystemValues[SYSTEM_VALUE_INSTANCE_ID][0] = (GLfloat) instID;
-}
-
-
-/**
- * Map the texture images which the vertex program will access (if any).
- */
-static void
-map_textures(struct gl_context *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(struct gl_context *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( struct gl_context *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 = &store->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 & BITFIELD64_BIT(i)) {
- outputs[numOutputs++] = i;
- }
- }
-
- map_textures(ctx, program);
-
- for (i = 0; i < VB->Count; i++) {
- GLuint attr;
-
- init_machine(ctx, machine, tnl->CurInstance);
-
-#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]);
- }
-
- /* FOGC is a special case. Fragment shader expects (f,0,0,1) */
- if (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_FOGC)) {
- store->results[VERT_RESULT_FOGC].data[i][1] = 0.0;
- store->results[VERT_RESULT_FOGC].data[i][2] = 0.0;
- store->results[VERT_RESULT_FOGC].data[i][3] = 1.0;
- }
-#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 & BITFIELD64_BIT(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 & BITFIELD64_BIT(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->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];
- VB->BackfaceColorPtr = &store->results[VERT_RESULT_BFC0];
- VB->BackfaceSecondaryColorPtr = &store->results[VERT_RESULT_BFC1];
-
- for (i = 0; i < ctx->Const.MaxTextureCoordUnits; 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 & BITFIELD64_BIT(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(struct gl_context *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 = CALLOC(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 *) _mesa_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 );
- _mesa_align_free( store->clipmask );
-
- FREE( store );
- stage->privatePtr = NULL;
- }
-}
-
-
-static void
-validate_vp_stage(struct gl_context *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 */
-};
+/* + * 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/macros.h" +#include "main/imports.h" +#include "math/m_xform.h" +#include "program/prog_instruction.h" +#include "program/prog_statevars.h" +#include "program/prog_execute.h" +#include "swrast/s_context.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 */ + + struct gl_program_machine machine; +}; + + +#define VP_STAGE_DATA(stage) ((struct vp_stage_data *)(stage->privatePtr)) + + +static void +userclip( struct gl_context *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(struct gl_context *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; + + tnl_clip_prepare(ctx); + + if (tnl->NeedNdcCoords) { + VB->NdcPtr = + _mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr, + &store->ndcCoords, + store->clipmask, + &store->ormask, + &store->andmask, + !ctx->Transform.DepthClamp ); + } + else { + VB->NdcPtr = NULL; + _mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr, + NULL, + store->clipmask, + &store->ormask, + &store->andmask, + !ctx->Transform.DepthClamp ); + } + + 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(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); +} + + +/** + * Called via ctx->Driver.ProgramStringNotify() after a new vertex program + * string has been parsed. + */ +GLboolean +_tnl_program_string(struct gl_context *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. + */ + return GL_TRUE; +} + + +/** + * Initialize virtual machine state prior to executing vertex program. + */ +static void +init_machine(struct gl_context *ctx, struct gl_program_machine *machine, + GLuint instID) +{ + /* 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; + + machine->SystemValues[SYSTEM_VALUE_INSTANCE_ID][0] = (GLfloat) instID; +} + + +/** + * Map the texture images which the vertex program will access (if any). + */ +static void +map_textures(struct gl_context *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(struct gl_context *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( struct gl_context *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 = &store->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 & BITFIELD64_BIT(i)) { + outputs[numOutputs++] = i; + + if (!store->results[i].data) { + _mesa_vector4f_alloc( &store->results[i], 0, VB->Size, 32 ); + store->results[i].size = 4; + } + } + } + + map_textures(ctx, program); + + for (i = 0; i < VB->Count; i++) { + GLuint attr; + + init_machine(ctx, machine, tnl->CurInstance); + +#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]); + } + + /* FOGC is a special case. Fragment shader expects (f,0,0,1) */ + if (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_FOGC)) { + store->results[VERT_RESULT_FOGC].data[i][1] = 0.0; + store->results[VERT_RESULT_FOGC].data[i][2] = 0.0; + store->results[VERT_RESULT_FOGC].data[i][3] = 1.0; + } +#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 & BITFIELD64_BIT(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 & BITFIELD64_BIT(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->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]; + VB->BackfaceColorPtr = &store->results[VERT_RESULT_BFC0]; + VB->BackfaceSecondaryColorPtr = &store->results[VERT_RESULT_BFC1]; + + for (i = 0; i < ctx->Const.MaxTextureCoordUnits; 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 & BITFIELD64_BIT(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(struct gl_context *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; + + stage->privatePtr = CALLOC(sizeof(*store)); + store = VP_STAGE_DATA(stage); + if (!store) + return GL_FALSE; + + /* a few other misc allocations */ + _mesa_vector4f_alloc( &store->ndcCoords, 0, size, 32 ); + store->clipmask = (GLubyte *) _mesa_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 ); + _mesa_align_free( store->clipmask ); + + FREE( store ); + stage->privatePtr = NULL; + } +} + + +static void +validate_vp_stage(struct gl_context *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 */ +}; |