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- /* $Id: texgen_tmp.h,v 1.3 1999/11/08 15:30:49 brianp Exp $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 3.1
- *
- * Copyright (C) 1999 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.
- */
-
- /*
- * New (3.1) transformation code written by Keith Whitwell.
- */
-
-
- /* Need to transform the eye plane equations into object space, and
- * use ctx->EyeZDir in spheregen.
- */
-
- #define CULL IDX&1
-
- /*
- */
- static void TAG(build_m3)(GLfloat f[][3],
- GLfloat m[],
- const GLvector3f *normals,
- const GLvector4f *coord_vec,
- const GLuint flags[],
- const GLubyte cullmask[] )
- {
- GLuint stride = coord_vec->stride;
- GLfloat *coord = (GLfloat *)coord_vec->start;
- GLuint count = coord_vec->count;
-
- const GLfloat *normal = FIRST_NORMAL;
- GLuint i;
-
- LOCAL_VARS;
-
- (void) flags;
- (void) cullmask;
-
- /* KW: Had to rearrange this loop to avoid a compiler bug with gcc
- * 2.7.3.1 at -O3 optimization. Using -fno-strength-reduce
- * also fixed the bug - is this generally necessary?
- */
- for (i=0;i<count;i++,STRIDE_F(coord,stride)) {
- CHECK {
- const GLfloat *norm = normal;
- 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 / (GLfloat) GL_SQRT(m[i]);
- }
- }
- NEXT_NORMAL;
- }
- }
-
-
-
- static void TAG(build_m2)(GLfloat f[][3],
- GLfloat m[],
- const GLvector3f *normals,
- const GLvector4f *coord_vec,
- const GLuint flags[],
- const GLubyte cullmask[] )
- {
- GLuint stride = coord_vec->stride;
- GLfloat *coord = coord_vec->start;
- GLuint count = coord_vec->count;
-
- GLfloat *normal = FIRST_NORMAL;
- GLuint i;
-
- LOCAL_VARS;
-
- (void) flags;
- (void) cullmask;
-
- for (i=0;i<count;i++,STRIDE_F(coord,stride)) {
- CHECK {
- GLfloat *norm = normal;
- 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 / (GLfloat) GL_SQRT(m[i]);
- }
- }
- NEXT_NORMAL;
- }
- }
-
-
-
- static build_m_func TAG(build_m_tab)[5] = {
- 0,
- 0,
- TAG(build_m2),
- TAG(build_m3),
- TAG(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 TAG(build_f3)( GLfloat *f,
- GLuint fstride,
- const GLvector3f *normals,
- const GLvector4f *coord_vec,
- const GLuint flags[],
- const GLubyte cullmask[] )
- {
- GLuint stride = coord_vec->stride;
- GLfloat *coord = coord_vec->start;
- GLuint count = coord_vec->count;
-
- GLfloat *normal = FIRST_NORMAL;
- GLuint i;
-
- LOCAL_VARS;
-
- (void) flags;
- (void) cullmask;
-
- for (i=0;i<count;i++, STRIDE_F(coord,stride), STRIDE_F(f,fstride), NEXT_NORMAL) {
- CHECK {
- GLfloat u[3], two_nu;
- COPY_3V( u, coord );
- NORMALIZE_3FV( u );
- two_nu = 2.0F * DOT3(normal,u);
- f[0] = u[0] - normal[0] * two_nu;
- f[1] = u[1] - normal[1] * two_nu;
- f[2] = u[2] - normal[2] * two_nu;
- }
- }
- }
-
-
- static void TAG(build_f2)( GLfloat *f,
- GLuint fstride,
- const GLvector3f *normals,
- const GLvector4f *coord_vec,
- const GLuint flags[],
- const GLubyte cullmask[] )
- {
- GLuint stride = coord_vec->stride;
- GLfloat *coord = coord_vec->start;
- GLuint count = coord_vec->count;
-
- GLfloat *normal = FIRST_NORMAL;
- GLuint i;
-
- LOCAL_VARS;
-
- (void) flags;
- (void) cullmask;
-
- for (i=0;i<count;i++,STRIDE_F(coord,stride), STRIDE_F(f,fstride), NEXT_NORMAL) {
- CHECK {
- GLfloat u[3], two_nu;
- COPY_2V( u, coord );
- u[2] = 0;
- NORMALIZE_3FV( u );
- two_nu = 2.0F * DOT3(normal,u);
- f[0] = u[0] - normal[0] * two_nu;
- f[1] = u[1] - normal[1] * two_nu;
- f[2] = u[2] - normal[2] * two_nu;
- }
- }
- }
-
- /* Just treat 4-vectors as 3-vectors.
- */
- static build_f_func TAG(build_f_tab)[5] = {
- 0,
- 0,
- TAG(build_f2),
- TAG(build_f3),
- TAG(build_f3)
- };
-
-
- /* Special case texgen functions.
- */
- static void TAG(texgen_reflection_map_nv)( struct vertex_buffer *VB,
- GLuint textureUnit )
- {
- GLvector4f *in = VB->TexCoordPtr[textureUnit];
- GLvector4f *out = VB->store.TexCoord[textureUnit];
- GLubyte *cullmask = VB->CullMask + VB->Start;
-
- TAG(build_f_tab)[VB->Unprojected->size]( out->start,
- out->stride,
- VB->NormalPtr,
- VB->Unprojected,
- VB->Flag + VB->Start,
- cullmask );
-
- if (!in) in = out;
-
- if (in != out && in->size == 4) {
- gl_copy_tab[CULL][0x8](out, in, cullmask);
- }
-
- VB->TexCoordPtr[textureUnit] = out;
- out->size = MAX2(in->size, 3);
- out->flags |= in->flags | VEC_SIZE_3;
- }
-
-
-
- static void TAG(texgen_normal_map_nv)( struct vertex_buffer *VB,
- GLuint textureUnit )
- {
- GLvector4f *in = VB->TexCoordPtr[textureUnit];
- GLvector4f *out = VB->store.TexCoord[textureUnit];
- GLvector3f *normals = VB->NormalPtr;
- GLfloat (*texcoord)[4] = (GLfloat (*)[4])out->start;
- GLubyte *cullmask = VB->CullMask + VB->Start;
- GLuint *flags = VB->Flag + VB->Start;
- GLuint count = VB->Count;
- GLuint i;
- const GLfloat *normal = FIRST_NORMAL;
-
- LOCAL_VARS;
-
- (void) flags;
-
-
- for (i=0;i<count;i++, NEXT_NORMAL) {
- CHECK {
- texcoord[i][0] = normal[0];
- texcoord[i][1] = normal[1];
- texcoord[i][2] = normal[2];
- }
- }
-
- if (!in) in = out;
-
- if (in != out && in->size == 4) {
- gl_copy_tab[CULL][0x8](out, in, cullmask);
- }
-
- VB->TexCoordPtr[textureUnit] = out;
- out->size = MAX2(in->size, 3);
- out->flags |= in->flags | VEC_SIZE_3;
- }
-
-
- static void TAG(texgen_sphere_map)( struct vertex_buffer *VB,
- GLuint textureUnit )
- {
- GLvector4f *in = VB->TexCoordPtr[textureUnit];
- GLvector4f *out = VB->store.TexCoord[textureUnit];
- GLfloat (*texcoord)[4] = (GLfloat (*)[4]) out->start;
- GLubyte *cullmask = VB->CullMask + VB->Start;
- GLuint count = VB->Count;
- GLuint i;
- GLfloat (*f)[3], *m;
-
- if (!VB->tmp_f)
- VB->tmp_f = (GLfloat (*)[3])malloc(VB->Size * sizeof(GLfloat) * 3);
-
- if (!VB->tmp_m)
- VB->tmp_m = (GLfloat *)malloc(VB->Size * sizeof(GLfloat));
-
- f = VB->tmp_f;
- m = VB->tmp_m;
-
- (TAG(build_m_tab)[VB->Unprojected->size])( f, m,
- VB->NormalPtr,
- VB->Unprojected,
- VB->Flag + VB->Start,
- cullmask );
-
- for (i=0;i<count;i++) {
- CHECK {
- texcoord[i][0] = f[i][0] * m[i] + 0.5F;
- texcoord[i][1] = f[i][1] * m[i] + 0.5F;
- }
- }
-
-
- if (!in) in = out;
-
- if (in != out) {
- struct gl_texture_unit *texUnit = &VB->ctx->Texture.Unit[textureUnit];
- GLuint copy = (all_bits[in->size] & ~texUnit->TexGenEnabled);
- if (copy)
- gl_copy_tab[CULL][copy](out, in, cullmask);
- }
-
- VB->TexCoordPtr[textureUnit] = out;
- out->size = MAX2(in->size,2);
- out->flags |= in->flags | VEC_SIZE_2;
- }
-
-
-
- static void TAG(texgen)( struct vertex_buffer *VB, GLuint textureUnit )
- {
- GLcontext *ctx = VB->ctx;
- struct gl_texture_unit *texUnit = &ctx->Texture.Unit[textureUnit];
- const GLvector4f *obj = VB->ObjPtr;
- const GLvector4f *eye = VB->EyePtr;
- const GLvector3f *normals = VB->NormalPtr;
- const GLubyte *cullmask = VB->CullMask + VB->Start;
- const GLuint *flags = VB->Flag + VB->Start;
-
- GLvector4f *in = VB->TexCoordPtr[textureUnit];
- GLvector4f *out = VB->store.TexCoord[textureUnit];
- GLfloat (*texcoord)[4] = (GLfloat (*)[4])out->start;
- GLfloat *indata;
- GLuint instride;
- GLuint count = VB->Count;
- GLfloat (*f)[3], *m;
-
- LOCAL_VARS;
-
- if (!VB->tmp_f)
- VB->tmp_f = (GLfloat (*)[3])malloc(VB->Size * sizeof(GLfloat) * 3);
-
- if (!VB->tmp_m)
- VB->tmp_m = (GLfloat *)malloc(VB->Size * sizeof(GLfloat));
-
- f = VB->tmp_f;
- m = VB->tmp_m;
-
- if (!in) in = out;
- instride = in->stride;
-
-
-
- if (texUnit->GenFlags & TEXGEN_NEED_M) {
- TAG(build_m_tab)[in->size]( f, m, normals, eye, flags, cullmask );
- } else if (texUnit->GenFlags & TEXGEN_NEED_F) {
- TAG(build_f_tab)[in->size]( (GLfloat *)f, 3, normals, eye,
- flags, cullmask );
- }
-
- if (in != out) {
- GLuint copy = (all_bits[in->size] & ~texUnit->TexGenEnabled);
- if (copy)
- gl_copy_tab[CULL][copy](out, in, cullmask);
- }
-
- if (texUnit->Holes)
- {
- GLubyte holes = (GLubyte) (texUnit->Holes & ~all_bits[in->size]);
- if (holes) {
- if (holes & VEC_DIRTY_2) gl_vector4f_clean_elem(out, count, 2);
- if (holes & VEC_DIRTY_1) gl_vector4f_clean_elem(out, count, 1);
- if (holes & VEC_DIRTY_0) gl_vector4f_clean_elem(out, count, 0);
- }
- }
-
- VB->TexCoordPtr[textureUnit] = out;
- out->size = MAX2(in->size, texUnit->TexgenSize);
- out->flags |= in->flags | texUnit->TexGenEnabled;
-
- if (texUnit->TexGenEnabled & S_BIT) {
- GLuint i;
- switch (texUnit->GenModeS) {
- case GL_OBJECT_LINEAR:
- (gl_dotprod_tab[CULL][obj->size])(out, 0, obj,
- texUnit->ObjectPlaneS, cullmask);
- break;
- case GL_EYE_LINEAR:
- (gl_dotprod_tab[CULL][eye->size])(out, 0, eye,
- texUnit->EyePlaneS, cullmask);
- break;
- case GL_SPHERE_MAP:
- for (indata=in->start,i=0 ; i<count ; i++, STRIDE_F(indata,instride) )
- CHECK texcoord[i][0] = indata[0] * m[i] + 0.5F;
- break;
- case GL_REFLECTION_MAP_NV:
- for (i=0;i<count;i++)
- CHECK texcoord[i][0] = f[i][0];
- break;
- case GL_NORMAL_MAP_NV: {
-
- const GLfloat *normal = FIRST_NORMAL;
- for (i=0;i<count;i++, NEXT_NORMAL) {
- CHECK texcoord[i][0] = normal[0];
- }
- break;
- }
- default:
- gl_problem(ctx, "Bad S texgen");
- }
- }
-
- if (texUnit->TexGenEnabled & T_BIT) {
- GLuint i;
- switch (texUnit->GenModeT) {
- case GL_OBJECT_LINEAR:
- (gl_dotprod_tab[CULL][obj->size])(out, 1, obj,
- texUnit->ObjectPlaneT, cullmask);
- break;
- case GL_EYE_LINEAR:
- (gl_dotprod_tab[CULL][eye->size])(out, 1, eye,
- texUnit->EyePlaneT, cullmask);
- break;
- case GL_SPHERE_MAP:
- for (indata=in->start,i=0; i<count ;i++,STRIDE_F(indata,instride))
- CHECK texcoord[i][1] = indata[1] * m[i] + 0.5F;
- break;
- case GL_REFLECTION_MAP_NV:
- for (i=0;i<count;i++)
- CHECK texcoord[i][0] = f[i][0];
- break;
- case GL_NORMAL_MAP_NV: {
- const GLfloat *normal = FIRST_NORMAL;
- for (i=0;i<count;i++, NEXT_NORMAL) {
- CHECK texcoord[i][1] = normal[1];
- }
- break;
- }
- default:
- gl_problem(ctx, "Bad T texgen");
- }
- }
-
- if (texUnit->TexGenEnabled & R_BIT) {
- GLuint i;
- switch (texUnit->GenModeR) {
- case GL_OBJECT_LINEAR:
- (gl_dotprod_tab[CULL][obj->size])(out, 2, obj,
- texUnit->ObjectPlaneR, cullmask);
- break;
- case GL_EYE_LINEAR:
- (gl_dotprod_tab[CULL][eye->size])(out, 2, eye,
- texUnit->EyePlaneR, cullmask);
- break;
- case GL_REFLECTION_MAP_NV:
- for (i=0;i<count;i++)
- CHECK texcoord[i][2] = f[i][2];
- break;
- case GL_NORMAL_MAP_NV: {
- const GLfloat *normal = FIRST_NORMAL;
- for (i=0;i<count;i++,NEXT_NORMAL) {
- CHECK texcoord[i][2] = normal[2];
- }
- break;
- }
- default:
- gl_problem(ctx, "Bad R texgen");
- }
- }
-
- if (texUnit->TexGenEnabled & Q_BIT) {
- switch (texUnit->GenModeQ) {
- case GL_OBJECT_LINEAR:
- (gl_dotprod_tab[CULL][obj->size])(out, 3, obj,
- texUnit->ObjectPlaneQ, cullmask);
- break;
- case GL_EYE_LINEAR:
- (gl_dotprod_tab[CULL][eye->size])(out, 3, eye,
- texUnit->EyePlaneQ, cullmask);
- break;
- default:
- gl_problem(ctx, "Bad Q texgen");
- }
- }
- }
-
- static void TAG(init_texgen)( void )
- {
- texgen_generic_tab[IDX] = TAG(texgen);
- texgen_reflection_map_nv_tab[IDX] = TAG(texgen_reflection_map_nv);
- texgen_normal_map_nv_tab[IDX] = TAG(texgen_normal_map_nv);
- texgen_sphere_map_tab[IDX] = TAG(texgen_sphere_map);
- }
-
- #undef TAG
- #undef IDX
- #undef CULL
- #undef FIRST_NORMAL
- #undef NEXT_NORMAL
- #undef LOCAL_VARS
- #undef CHECK
-
-
-