f4511c4835
t_context.h Remove m_matrix.h and m_xform.h. t_vb_program.c Include m_xform.h. t_vb_render.c Include m_xform.h.
570 lines
16 KiB
C
570 lines
16 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 7.6
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*
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* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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* Copyright (C) 2009 VMware, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file tnl/t_vb_program.c
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* \brief Pipeline stage for executing vertex programs.
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* \author Brian Paul, Keith Whitwell
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*/
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#include "main/glheader.h"
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#include "main/colormac.h"
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#include "main/macros.h"
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#include "main/imports.h"
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#include "math/m_xform.h"
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#include "program/prog_instruction.h"
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#include "program/prog_statevars.h"
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#include "program/prog_execute.h"
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#include "swrast/s_context.h"
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#include "tnl/tnl.h"
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#include "tnl/t_context.h"
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#include "tnl/t_pipeline.h"
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#ifdef NAN_CHECK
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/** Check for NaNs and very large values */
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static INLINE void
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check_float(float x)
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{
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assert(!IS_INF_OR_NAN(x));
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assert(1.0e-15 <= x && x <= 1.0e15);
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}
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#endif
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/*!
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* Private storage for the vertex program pipeline stage.
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*/
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struct vp_stage_data {
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/** The results of running the vertex program go into these arrays. */
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GLvector4f results[VERT_RESULT_MAX];
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GLvector4f ndcCoords; /**< normalized device coords */
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GLubyte *clipmask; /**< clip flags */
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GLubyte ormask, andmask; /**< for clipping */
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};
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#define VP_STAGE_DATA(stage) ((struct vp_stage_data *)(stage->privatePtr))
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static void
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userclip( GLcontext *ctx,
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GLvector4f *clip,
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GLubyte *clipmask,
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GLubyte *clipormask,
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GLubyte *clipandmask )
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{
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GLuint p;
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for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
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if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
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GLuint nr, i;
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const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
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const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
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const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
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const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
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GLfloat *coord = (GLfloat *)clip->data;
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GLuint stride = clip->stride;
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GLuint count = clip->count;
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for (nr = 0, i = 0 ; i < count ; i++) {
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GLfloat dp = (coord[0] * a +
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coord[1] * b +
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coord[2] * c +
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coord[3] * d);
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if (dp < 0) {
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nr++;
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clipmask[i] |= CLIP_USER_BIT;
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}
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STRIDE_F(coord, stride);
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}
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if (nr > 0) {
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*clipormask |= CLIP_USER_BIT;
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if (nr == count) {
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*clipandmask |= CLIP_USER_BIT;
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return;
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}
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}
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}
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}
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}
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static GLboolean
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do_ndc_cliptest(GLcontext *ctx, struct vp_stage_data *store)
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{
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TNLcontext *tnl = TNL_CONTEXT(ctx);
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struct vertex_buffer *VB = &tnl->vb;
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/* Cliptest and perspective divide. Clip functions must clear
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* the clipmask.
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*/
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store->ormask = 0;
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store->andmask = CLIP_FRUSTUM_BITS;
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tnl_clip_prepare(ctx);
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if (tnl->NeedNdcCoords) {
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VB->NdcPtr =
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_mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr,
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&store->ndcCoords,
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store->clipmask,
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&store->ormask,
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&store->andmask,
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!ctx->Transform.DepthClamp );
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}
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else {
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VB->NdcPtr = NULL;
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_mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr,
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NULL,
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store->clipmask,
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&store->ormask,
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&store->andmask,
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!ctx->Transform.DepthClamp );
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}
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if (store->andmask) {
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/* All vertices are outside the frustum */
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return GL_FALSE;
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}
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/* Test userclip planes. This contributes to VB->ClipMask.
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*/
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/** XXX NEW_SLANG _Enabled ??? */
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if (ctx->Transform.ClipPlanesEnabled && (!ctx->VertexProgram._Enabled ||
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ctx->VertexProgram.Current->IsPositionInvariant)) {
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userclip( ctx,
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VB->ClipPtr,
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store->clipmask,
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&store->ormask,
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&store->andmask );
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if (store->andmask) {
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return GL_FALSE;
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}
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}
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VB->ClipAndMask = store->andmask;
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VB->ClipOrMask = store->ormask;
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VB->ClipMask = store->clipmask;
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return GL_TRUE;
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}
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/**
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* XXX the texture sampling code in this module is a bit of a hack.
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* The texture sampling code is in swrast, though it doesn't have any
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* real dependencies on the rest of swrast. It should probably be
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* moved into main/ someday.
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*/
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static void
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vp_fetch_texel(GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda,
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GLuint unit, GLfloat color[4])
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{
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SWcontext *swrast = SWRAST_CONTEXT(ctx);
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/* XXX use a float-valued TextureSample routine here!!! */
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swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current,
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1, (const GLfloat (*)[4]) texcoord,
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&lambda, (GLfloat (*)[4]) color);
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}
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/**
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* Called via ctx->Driver.ProgramStringNotify() after a new vertex program
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* string has been parsed.
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*/
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GLboolean
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_tnl_program_string(GLcontext *ctx, GLenum target, struct gl_program *program)
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{
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/* No-op.
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* If we had derived anything from the program that was private to this
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* stage we'd recompute/validate it here.
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*/
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return GL_TRUE;
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}
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/**
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* Initialize virtual machine state prior to executing vertex program.
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*/
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static void
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init_machine(GLcontext *ctx, struct gl_program_machine *machine)
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{
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/* Input registers get initialized from the current vertex attribs */
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memcpy(machine->VertAttribs, ctx->Current.Attrib,
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MAX_VERTEX_GENERIC_ATTRIBS * 4 * sizeof(GLfloat));
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if (ctx->VertexProgram._Current->IsNVProgram) {
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GLuint i;
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/* Output/result regs are initialized to [0,0,0,1] */
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for (i = 0; i < MAX_NV_VERTEX_PROGRAM_OUTPUTS; i++) {
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ASSIGN_4V(machine->Outputs[i], 0.0F, 0.0F, 0.0F, 1.0F);
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}
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/* Temp regs are initialized to [0,0,0,0] */
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for (i = 0; i < MAX_NV_VERTEX_PROGRAM_TEMPS; i++) {
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ASSIGN_4V(machine->Temporaries[i], 0.0F, 0.0F, 0.0F, 0.0F);
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}
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for (i = 0; i < MAX_VERTEX_PROGRAM_ADDRESS_REGS; i++) {
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ASSIGN_4V(machine->AddressReg[i], 0, 0, 0, 0);
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}
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}
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machine->NumDeriv = 0;
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/* init condition codes */
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machine->CondCodes[0] = COND_EQ;
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machine->CondCodes[1] = COND_EQ;
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machine->CondCodes[2] = COND_EQ;
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machine->CondCodes[3] = COND_EQ;
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/* init call stack */
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machine->StackDepth = 0;
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machine->FetchTexelLod = vp_fetch_texel;
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machine->FetchTexelDeriv = NULL; /* not used by vertex programs */
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machine->Samplers = ctx->VertexProgram._Current->Base.SamplerUnits;
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}
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/**
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* Map the texture images which the vertex program will access (if any).
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*/
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static void
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map_textures(GLcontext *ctx, const struct gl_vertex_program *vp)
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{
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GLuint u;
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if (!ctx->Driver.MapTexture)
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return;
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for (u = 0; u < ctx->Const.MaxVertexTextureImageUnits; u++) {
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if (vp->Base.TexturesUsed[u]) {
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/* Note: _Current *should* correspond to the target indicated
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* in TexturesUsed[u].
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*/
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ctx->Driver.MapTexture(ctx, ctx->Texture.Unit[u]._Current);
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}
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}
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}
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/**
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* Unmap the texture images which were used by the vertex program (if any).
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*/
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static void
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unmap_textures(GLcontext *ctx, const struct gl_vertex_program *vp)
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{
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GLuint u;
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if (!ctx->Driver.MapTexture)
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return;
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for (u = 0; u < ctx->Const.MaxVertexTextureImageUnits; u++) {
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if (vp->Base.TexturesUsed[u]) {
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/* Note: _Current *should* correspond to the target indicated
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* in TexturesUsed[u].
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*/
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ctx->Driver.UnmapTexture(ctx, ctx->Texture.Unit[u]._Current);
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}
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}
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}
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/**
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* This function executes vertex programs
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*/
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static GLboolean
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run_vp( GLcontext *ctx, struct tnl_pipeline_stage *stage )
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{
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TNLcontext *tnl = TNL_CONTEXT(ctx);
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struct vp_stage_data *store = VP_STAGE_DATA(stage);
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struct vertex_buffer *VB = &tnl->vb;
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struct gl_vertex_program *program = ctx->VertexProgram._Current;
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struct gl_program_machine machine;
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GLuint outputs[VERT_RESULT_MAX], numOutputs;
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GLuint i, j;
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if (!program)
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return GL_TRUE;
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if (program->IsNVProgram) {
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_mesa_load_tracked_matrices(ctx);
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}
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else {
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/* ARB program or vertex shader */
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_mesa_load_state_parameters(ctx, program->Base.Parameters);
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}
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/* make list of outputs to save some time below */
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numOutputs = 0;
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for (i = 0; i < VERT_RESULT_MAX; i++) {
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if (program->Base.OutputsWritten & BITFIELD64_BIT(i)) {
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outputs[numOutputs++] = i;
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}
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}
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map_textures(ctx, program);
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for (i = 0; i < VB->Count; i++) {
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GLuint attr;
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init_machine(ctx, &machine);
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#if 0
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printf("Input %d: %f, %f, %f, %f\n", i,
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VB->AttribPtr[0]->data[i][0],
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VB->AttribPtr[0]->data[i][1],
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VB->AttribPtr[0]->data[i][2],
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VB->AttribPtr[0]->data[i][3]);
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printf(" color: %f, %f, %f, %f\n",
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VB->AttribPtr[3]->data[i][0],
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VB->AttribPtr[3]->data[i][1],
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VB->AttribPtr[3]->data[i][2],
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VB->AttribPtr[3]->data[i][3]);
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printf(" normal: %f, %f, %f, %f\n",
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VB->AttribPtr[2]->data[i][0],
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VB->AttribPtr[2]->data[i][1],
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VB->AttribPtr[2]->data[i][2],
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VB->AttribPtr[2]->data[i][3]);
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#endif
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/* the vertex array case */
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for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
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if (program->Base.InputsRead & (1 << attr)) {
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const GLubyte *ptr = (const GLubyte*) VB->AttribPtr[attr]->data;
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const GLuint size = VB->AttribPtr[attr]->size;
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const GLuint stride = VB->AttribPtr[attr]->stride;
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const GLfloat *data = (GLfloat *) (ptr + stride * i);
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#ifdef NAN_CHECK
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check_float(data[0]);
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check_float(data[1]);
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check_float(data[2]);
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check_float(data[3]);
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#endif
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COPY_CLEAN_4V(machine.VertAttribs[attr], size, data);
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}
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}
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/* execute the program */
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_mesa_execute_program(ctx, &program->Base, &machine);
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/* copy the output registers into the VB->attribs arrays */
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for (j = 0; j < numOutputs; j++) {
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const GLuint attr = outputs[j];
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#ifdef NAN_CHECK
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check_float(machine.Outputs[attr][0]);
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check_float(machine.Outputs[attr][1]);
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check_float(machine.Outputs[attr][2]);
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check_float(machine.Outputs[attr][3]);
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#endif
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COPY_4V(store->results[attr].data[i], machine.Outputs[attr]);
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}
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/* FOGC is a special case. Fragment shader expects (f,0,0,1) */
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if (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_FOGC)) {
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store->results[VERT_RESULT_FOGC].data[i][1] = 0.0;
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store->results[VERT_RESULT_FOGC].data[i][2] = 0.0;
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store->results[VERT_RESULT_FOGC].data[i][3] = 1.0;
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}
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#ifdef NAN_CHECK
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ASSERT(machine.Outputs[0][3] != 0.0F);
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#endif
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#if 0
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printf("HPOS: %f %f %f %f\n",
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machine.Outputs[0][0],
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machine.Outputs[0][1],
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machine.Outputs[0][2],
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machine.Outputs[0][3]);
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#endif
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}
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unmap_textures(ctx, program);
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/* Fixup fog and point size results if needed */
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if (program->IsNVProgram) {
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if (ctx->Fog.Enabled &&
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(program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_FOGC)) == 0) {
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for (i = 0; i < VB->Count; i++) {
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store->results[VERT_RESULT_FOGC].data[i][0] = 1.0;
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}
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}
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if (ctx->VertexProgram.PointSizeEnabled &&
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(program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_PSIZ)) == 0) {
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for (i = 0; i < VB->Count; i++) {
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store->results[VERT_RESULT_PSIZ].data[i][0] = ctx->Point.Size;
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}
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}
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}
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if (program->IsPositionInvariant) {
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/* We need the exact same transform as in the fixed function path here
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* to guarantee invariance, depending on compiler optimization flags
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* results could be different otherwise.
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*/
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VB->ClipPtr = TransformRaw( &store->results[0],
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&ctx->_ModelProjectMatrix,
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VB->AttribPtr[0] );
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/* Drivers expect this to be clean to element 4...
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*/
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switch (VB->ClipPtr->size) {
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case 1:
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/* impossible */
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case 2:
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_mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 2 );
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/* fall-through */
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case 3:
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_mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 3 );
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/* fall-through */
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case 4:
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break;
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}
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}
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else {
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/* Setup the VB pointers so that the next pipeline stages get
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* their data from the right place (the program output arrays).
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*/
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VB->ClipPtr = &store->results[VERT_RESULT_HPOS];
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VB->ClipPtr->size = 4;
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VB->ClipPtr->count = VB->Count;
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}
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VB->AttribPtr[VERT_ATTRIB_COLOR0] = &store->results[VERT_RESULT_COL0];
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VB->AttribPtr[VERT_ATTRIB_COLOR1] = &store->results[VERT_RESULT_COL1];
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VB->AttribPtr[VERT_ATTRIB_FOG] = &store->results[VERT_RESULT_FOGC];
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VB->AttribPtr[_TNL_ATTRIB_POINTSIZE] = &store->results[VERT_RESULT_PSIZ];
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VB->BackfaceColorPtr = &store->results[VERT_RESULT_BFC0];
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VB->BackfaceSecondaryColorPtr = &store->results[VERT_RESULT_BFC1];
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for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
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VB->AttribPtr[_TNL_ATTRIB_TEX0 + i]
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= &store->results[VERT_RESULT_TEX0 + i];
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}
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for (i = 0; i < ctx->Const.MaxVarying; i++) {
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if (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_VAR0 + i)) {
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/* Note: varying results get put into the generic attributes */
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VB->AttribPtr[VERT_ATTRIB_GENERIC0+i]
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= &store->results[VERT_RESULT_VAR0 + i];
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}
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}
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/* Perform NDC and cliptest operations:
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*/
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return do_ndc_cliptest(ctx, store);
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}
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/**
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* Called the first time stage->run is called. In effect, don't
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* allocate data until the first time the stage is run.
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*/
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static GLboolean
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init_vp(GLcontext *ctx, struct tnl_pipeline_stage *stage)
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{
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TNLcontext *tnl = TNL_CONTEXT(ctx);
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struct vertex_buffer *VB = &(tnl->vb);
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struct vp_stage_data *store;
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const GLuint size = VB->Size;
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GLuint i;
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stage->privatePtr = MALLOC(sizeof(*store));
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store = VP_STAGE_DATA(stage);
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if (!store)
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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 */
|
|
};
|