aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/mesa/tnl/t_vb_program.c
diff options
context:
space:
mode:
Diffstat (limited to 'mesalib/src/mesa/tnl/t_vb_program.c')
-rw-r--r--mesalib/src/mesa/tnl/t_vb_program.c1140
1 files changed, 571 insertions, 569 deletions
diff --git a/mesalib/src/mesa/tnl/t_vb_program.c b/mesalib/src/mesa/tnl/t_vb_program.c
index f3a338ef1..ea5717a7a 100644
--- a/mesalib/src/mesa/tnl/t_vb_program.c
+++ b/mesalib/src/mesa/tnl/t_vb_program.c
@@ -1,569 +1,571 @@
-/*
- * 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 */
-};
-
-
-#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;
-
- 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(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.
- */
-GLboolean
-_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.
- */
- return GL_TRUE;
-}
-
-
-/**
- * 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 & BITFIELD64_BIT(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]);
- }
-
- /* 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(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 *) _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(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 */
-};
+/*
+ * 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)
+{
+ /* 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(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);
+
+#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 */
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 14:12:01 +0000