+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 6.5
- *
- * Copyright (C) 1999-2006 Brian Paul 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.
- *
- * Authors:
- * Brian Paul
- * Keith Whitwell <keith@tungstengraphics.com>
- */
-
-/*
- * Regarding GL_NV_texgen_reflection:
- *
- * Portions of this software may use or implement intellectual
- * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims
- * any and all warranties with respect to such intellectual property,
- * including any use thereof or modifications thereto.
- */
-
-#include <precomp.h>
-
-/***********************************************************************
- * Automatic texture coordinate generation (texgen) code.
- */
-
-
-struct texgen_stage_data;
-
-typedef void (*texgen_func)( struct gl_context *ctx,
- struct texgen_stage_data *store);
-
-
-struct texgen_stage_data {
-
- /* Per-texunit derived state.
- */
- GLuint TexgenSize;
- texgen_func TexgenFunc;
-
- /* Temporary values used in texgen.
- */
- GLfloat (*tmp_f)[3];
- GLfloat *tmp_m;
-
- /* Buffered outputs of the stage.
- */
- GLvector4f texcoord;
-};
-
-
-#define TEXGEN_STAGE_DATA(stage) ((struct texgen_stage_data *)stage->privatePtr)
-
-
-
-static GLuint all_bits[5] = {
- 0,
- VEC_SIZE_1,
- VEC_SIZE_2,
- VEC_SIZE_3,
- VEC_SIZE_4,
-};
-
-#define VEC_SIZE_FLAGS (VEC_SIZE_1|VEC_SIZE_2|VEC_SIZE_3|VEC_SIZE_4)
-
-#define TEXGEN_NEED_M (TEXGEN_SPHERE_MAP)
-#define TEXGEN_NEED_F (TEXGEN_SPHERE_MAP | \
- TEXGEN_REFLECTION_MAP_NV)
-
-
-
-static void build_m3( GLfloat f[][3], GLfloat m[],
- const GLvector4f *normal,
- const GLvector4f *eye )
-{
- GLuint stride = eye->stride;
- GLfloat *coord = (GLfloat *)eye->start;
- GLuint count = eye->count;
- const GLfloat *norm = normal->start;
- GLuint i;
-
- for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(norm,normal->stride)) {
- GLfloat u[3], two_nu, fx, fy, fz;
- COPY_3V( u, coord );
- NORMALIZE_3FV( u );
- two_nu = 2.0F * DOT3(norm,u);
- fx = f[i][0] = u[0] - norm[0] * two_nu;
- fy = f[i][1] = u[1] - norm[1] * two_nu;
- fz = f[i][2] = u[2] - norm[2] * two_nu;
- m[i] = fx * fx + fy * fy + (fz + 1.0F) * (fz + 1.0F);
- if (m[i] != 0.0F) {
- m[i] = 0.5F * _mesa_inv_sqrtf(m[i]);
- }
- }
-}
-
-
-
-static void build_m2( GLfloat f[][3], GLfloat m[],
- const GLvector4f *normal,
- const GLvector4f *eye )
-{
- GLuint stride = eye->stride;
- GLfloat *coord = eye->start;
- GLuint count = eye->count;
-
- GLfloat *norm = normal->start;
- GLuint i;
-
- for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(norm,normal->stride)) {
- GLfloat u[3], two_nu, fx, fy, fz;
- COPY_2V( u, coord );
- u[2] = 0;
- NORMALIZE_3FV( u );
- two_nu = 2.0F * DOT3(norm,u);
- fx = f[i][0] = u[0] - norm[0] * two_nu;
- fy = f[i][1] = u[1] - norm[1] * two_nu;
- fz = f[i][2] = u[2] - norm[2] * two_nu;
- m[i] = fx * fx + fy * fy + (fz + 1.0F) * (fz + 1.0F);
- if (m[i] != 0.0F) {
- m[i] = 0.5F * _mesa_inv_sqrtf(m[i]);
- }
- }
-}
-
-
-
-typedef void (*build_m_func)( GLfloat f[][3],
- GLfloat m[],
- const GLvector4f *normal,
- const GLvector4f *eye );
-
-
-static build_m_func build_m_tab[5] = {
- NULL,
- NULL,
- build_m2,
- build_m3,
- build_m3
-};
-
-
-/* This is unusual in that we respect the stride of the output vector
- * (f). This allows us to pass in either a texcoord vector4f, or a
- * temporary vector3f.
- */
-static void build_f3( GLfloat *f,
- GLuint fstride,
- const GLvector4f *normal,
- const GLvector4f *eye )
-{
- GLuint stride = eye->stride;
- GLfloat *coord = eye->start;
- GLuint count = eye->count;
-
- GLfloat *norm = normal->start;
- GLuint i;
-
- for (i=0;i<count;i++) {
- GLfloat u[3], two_nu;
- COPY_3V( u, coord );
- NORMALIZE_3FV( u );
- two_nu = 2.0F * DOT3(norm,u);
- f[0] = u[0] - norm[0] * two_nu;
- f[1] = u[1] - norm[1] * two_nu;
- f[2] = u[2] - norm[2] * two_nu;
- STRIDE_F(coord,stride);
- STRIDE_F(f,fstride);
- STRIDE_F(norm, normal->stride);
- }
-}
-
-
-static void build_f2( GLfloat *f,
- GLuint fstride,
- const GLvector4f *normal,
- const GLvector4f *eye )
-{
- GLuint stride = eye->stride;
- GLfloat *coord = eye->start;
- GLuint count = eye->count;
- GLfloat *norm = normal->start;
- GLuint i;
-
- for (i=0;i<count;i++) {
-
- GLfloat u[3], two_nu;
- COPY_2V( u, coord );
- u[2] = 0;
- NORMALIZE_3FV( u );
- two_nu = 2.0F * DOT3(norm,u);
- f[0] = u[0] - norm[0] * two_nu;
- f[1] = u[1] - norm[1] * two_nu;
- f[2] = u[2] - norm[2] * two_nu;
-
- STRIDE_F(coord,stride);
- STRIDE_F(f,fstride);
- STRIDE_F(norm, normal->stride);
- }
-}
-
-typedef void (*build_f_func)( GLfloat *f,
- GLuint fstride,
- const GLvector4f *normal_vec,
- const GLvector4f *eye );
-
-
-
-/* Just treat 4-vectors as 3-vectors.
- */
-static build_f_func build_f_tab[5] = {
- NULL,
- NULL,
- build_f2,
- build_f3,
- build_f3
-};
-
-
-
-/* Special case texgen functions.
- */
-static void texgen_reflection_map_nv( struct gl_context *ctx,
- struct texgen_stage_data *store)
-{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX];
- GLvector4f *out = &store->texcoord;
-
- build_f_tab[VB->EyePtr->size]( out->start,
- out->stride,
- VB->AttribPtr[_TNL_ATTRIB_NORMAL],
- VB->EyePtr );
-
- out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
- out->count = VB->Count;
- out->size = MAX2(in->size, 3);
- if (in->size == 4)
- _mesa_copy_tab[0x8]( out, in );
-}
-
-
-
-static void texgen_normal_map_nv( struct gl_context *ctx,
- struct texgen_stage_data *store)
-{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX];
- GLvector4f *out = &store->texcoord;
- GLvector4f *normal = VB->AttribPtr[_TNL_ATTRIB_NORMAL];
- GLfloat (*texcoord)[4] = (GLfloat (*)[4])out->start;
- GLuint count = VB->Count;
- GLuint i;
- const GLfloat *norm = normal->start;
-
- for (i=0;i<count;i++, STRIDE_F(norm, normal->stride)) {
- texcoord[i][0] = norm[0];
- texcoord[i][1] = norm[1];
- texcoord[i][2] = norm[2];
- }
-
-
- out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
- out->count = count;
- out->size = MAX2(in->size, 3);
- if (in->size == 4)
- _mesa_copy_tab[0x8]( out, in );
-}
-
-
-static void texgen_sphere_map( struct gl_context *ctx,
- struct texgen_stage_data *store)
-{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX];
- GLvector4f *out = &store->texcoord;
- GLfloat (*texcoord)[4] = (GLfloat (*)[4]) out->start;
- GLuint count = VB->Count;
- GLuint i;
- GLfloat (*f)[3] = store->tmp_f;
- GLfloat *m = store->tmp_m;
-
- (build_m_tab[VB->EyePtr->size])( store->tmp_f,
- store->tmp_m,
- VB->AttribPtr[_TNL_ATTRIB_NORMAL],
- VB->EyePtr );
-
- out->size = MAX2(in->size,2);
-
- for (i=0;i<count;i++) {
- texcoord[i][0] = f[i][0] * m[i] + 0.5F;
- texcoord[i][1] = f[i][1] * m[i] + 0.5F;
- }
-
- out->count = count;
- out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_2;
- if (in->size > 2)
- _mesa_copy_tab[all_bits[in->size] & ~0x3]( out, in );
-}
-
-
-
-static void texgen( struct gl_context *ctx,
- struct texgen_stage_data *store)
-{
- TNLcontext *tnl = TNL_CONTEXT(ctx);
- struct vertex_buffer *VB = &tnl->vb;
- GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX];
- GLvector4f *out = &store->texcoord;
- const struct gl_texture_unit *texUnit = &ctx->Texture.Unit;
- const GLvector4f *obj = VB->AttribPtr[_TNL_ATTRIB_POS];
- const GLvector4f *eye = VB->EyePtr;
- const GLvector4f *normal = VB->AttribPtr[_TNL_ATTRIB_NORMAL];
- const GLfloat *m = store->tmp_m;
- const GLuint count = VB->Count;
- GLfloat (*texcoord)[4] = (GLfloat (*)[4])out->data;
- GLfloat (*f)[3] = store->tmp_f;
- GLuint copy;
-
- if (texUnit->_GenFlags & TEXGEN_NEED_M) {
- build_m_tab[eye->size]( store->tmp_f, store->tmp_m, normal, eye );
- } else if (texUnit->_GenFlags & TEXGEN_NEED_F) {
- build_f_tab[eye->size]( (GLfloat *)store->tmp_f, 3, normal, eye );
- }
-
-
- out->size = MAX2(in->size, store->TexgenSize);
- out->flags |= (in->flags & VEC_SIZE_FLAGS) | texUnit->TexGenEnabled;
- out->count = count;
-
- copy = (all_bits[in->size] & ~texUnit->TexGenEnabled);
- if (copy)
- _mesa_copy_tab[copy]( out, in );
-
- if (texUnit->TexGenEnabled & S_BIT) {
- GLuint i;
- switch (texUnit->GenS.Mode) {
- case GL_OBJECT_LINEAR:
- _mesa_dotprod_tab[obj->size]( (GLfloat *)out->data,
- sizeof(out->data[0]), obj,
- texUnit->GenS.ObjectPlane );
- break;
- case GL_EYE_LINEAR:
- _mesa_dotprod_tab[eye->size]( (GLfloat *)out->data,
- sizeof(out->data[0]), eye,
- texUnit->GenS.EyePlane );
- break;
- case GL_SPHERE_MAP:
- for (i = 0; i < count; i++)
- texcoord[i][0] = f[i][0] * m[i] + 0.5F;
- break;
- case GL_REFLECTION_MAP_NV:
- for (i=0;i<count;i++)
- texcoord[i][0] = f[i][0];
- break;
- case GL_NORMAL_MAP_NV: {
- const GLfloat *norm = normal->start;
- for (i=0;i<count;i++, STRIDE_F(norm, normal->stride)) {
- texcoord[i][0] = norm[0];
- }
- break;
- }
- default:
- _mesa_problem(ctx, "Bad S texgen");
- }
- }
-
- if (texUnit->TexGenEnabled & T_BIT) {
- GLuint i;
- switch (texUnit->GenT.Mode) {
- case GL_OBJECT_LINEAR:
- _mesa_dotprod_tab[obj->size]( &(out->data[0][1]),
- sizeof(out->data[0]), obj,
- texUnit->GenT.ObjectPlane );
- break;
- case GL_EYE_LINEAR:
- _mesa_dotprod_tab[eye->size]( &(out->data[0][1]),
- sizeof(out->data[0]), eye,
- texUnit->GenT.EyePlane );
- break;
- case GL_SPHERE_MAP:
- for (i = 0; i < count; i++)
- texcoord[i][1] = f[i][1] * m[i] + 0.5F;
- break;
- case GL_REFLECTION_MAP_NV:
- for (i=0;i<count;i++)
- texcoord[i][1] = f[i][1];
- break;
- case GL_NORMAL_MAP_NV: {
- const GLfloat *norm = normal->start;
- for (i=0;i<count;i++, STRIDE_F(norm, normal->stride)) {
- texcoord[i][1] = norm[1];
- }
- break;
- }
- default:
- _mesa_problem(ctx, "Bad T texgen");
- }
- }
-
- if (texUnit->TexGenEnabled & R_BIT) {
- GLuint i;
- switch (texUnit->GenR.Mode) {
- case GL_OBJECT_LINEAR:
- _mesa_dotprod_tab[obj->size]( &(out->data[0][2]),
- sizeof(out->data[0]), obj,
- texUnit->GenR.ObjectPlane );
- break;
- case GL_EYE_LINEAR:
- _mesa_dotprod_tab[eye->size]( &(out->data[0][2]),
- sizeof(out->data[0]), eye,
- texUnit->GenR.EyePlane );
- break;
- case GL_REFLECTION_MAP_NV:
- for (i=0;i<count;i++)
- texcoord[i][2] = f[i][2];
- break;
- case GL_NORMAL_MAP_NV: {
- const GLfloat *norm = normal->start;
- for (i=0;i<count;i++,STRIDE_F(norm, normal->stride)) {
- texcoord[i][2] = norm[2];
- }
- break;
- }
- default:
- _mesa_problem(ctx, "Bad R texgen");
- }
- }
-
- if (texUnit->TexGenEnabled & Q_BIT) {
- switch (texUnit->GenQ.Mode) {
- case GL_OBJECT_LINEAR:
- _mesa_dotprod_tab[obj->size]( &(out->data[0][3]),
- sizeof(out->data[0]), obj,
- texUnit->GenQ.ObjectPlane );
- break;
- case GL_EYE_LINEAR:
- _mesa_dotprod_tab[eye->size]( &(out->data[0][3]),
- sizeof(out->data[0]), eye,
- texUnit->GenQ.EyePlane );
- break;
- default:
- _mesa_problem(ctx, "Bad Q texgen");
- }
- }
-}
-
-
-
-
-static GLboolean run_texgen_stage( struct gl_context *ctx,
- struct tnl_pipeline_stage *stage )
-{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);
-
- if (!ctx->Texture._TexGenEnabled)
- return GL_TRUE;
-
- {
- struct gl_texture_unit *texUnit = &ctx->Texture.Unit;
-
- if (texUnit->TexGenEnabled) {
-
- store->TexgenFunc( ctx, store);
-
- VB->AttribPtr[VERT_ATTRIB_TEX] = &store->texcoord;
- }
- }
-
- return GL_TRUE;
-}
-
-
-static void validate_texgen_stage( struct gl_context *ctx,
- struct tnl_pipeline_stage *stage )
-{
- struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);
-
- if (!ctx->Texture._TexGenEnabled)
- return;
-
- {
- struct gl_texture_unit *texUnit = &ctx->Texture.Unit;
-
- if (texUnit->TexGenEnabled) {
- GLuint sz;
-
- if (texUnit->TexGenEnabled & Q_BIT)
- sz = 4;
- else if (texUnit->TexGenEnabled & R_BIT)
- sz = 3;
- else if (texUnit->TexGenEnabled & T_BIT)
- sz = 2;
- else
- sz = 1;
-
- store->TexgenSize = sz;
- store->TexgenFunc = texgen; /* general solution */
-
- /* look for special texgen cases */
- if (texUnit->TexGenEnabled == (S_BIT|T_BIT|R_BIT)) {
- if (texUnit->_GenFlags == TEXGEN_REFLECTION_MAP_NV) {
- store->TexgenFunc = texgen_reflection_map_nv;
- }
- else if (texUnit->_GenFlags == TEXGEN_NORMAL_MAP_NV) {
- store->TexgenFunc = texgen_normal_map_nv;
- }
- }
- else if (texUnit->TexGenEnabled == (S_BIT|T_BIT) &&
- texUnit->_GenFlags == TEXGEN_SPHERE_MAP) {
- store->TexgenFunc = texgen_sphere_map;
- }
- }
- }
-}
-
-
-
-
-
-/* Called the first time stage->run() is invoked.
- */
-static GLboolean alloc_texgen_data( struct gl_context *ctx,
- struct tnl_pipeline_stage *stage )
-{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- struct texgen_stage_data *store;
-
- stage->privatePtr = CALLOC(sizeof(*store));
- store = TEXGEN_STAGE_DATA(stage);
- if (!store)
- return GL_FALSE;
-
- _mesa_vector4f_alloc( &store->texcoord, 0, VB->Size, 32 );
-
- store->tmp_f = (GLfloat (*)[3]) MALLOC(VB->Size * sizeof(GLfloat) * 3);
- store->tmp_m = (GLfloat *) MALLOC(VB->Size * sizeof(GLfloat));
-
- return GL_TRUE;
-}
-
-
-static void free_texgen_data( struct tnl_pipeline_stage *stage )
-
-{
- struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);
-
- if (store) {
- if (store->texcoord.data)
- _mesa_vector4f_free( &store->texcoord );
-
-
- if (store->tmp_f) FREE( store->tmp_f );
- if (store->tmp_m) FREE( store->tmp_m );
- FREE( store );
- stage->privatePtr = NULL;
- }
-}
-
-
-
-const struct tnl_pipeline_stage _tnl_texgen_stage =
-{
- "texgen", /* name */
- NULL, /* private data */
- alloc_texgen_data, /* destructor */
- free_texgen_data, /* destructor */
- validate_texgen_stage, /* check */
- run_texgen_stage /* run -- initially set to alloc data */
-};
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