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-rw-r--r--mesalib/src/mesa/tnl/t_vb_texgen.c1218
1 files changed, 609 insertions, 609 deletions
diff --git a/mesalib/src/mesa/tnl/t_vb_texgen.c b/mesalib/src/mesa/tnl/t_vb_texgen.c
index 950e0f54e..228808461 100644
--- a/mesalib/src/mesa/tnl/t_vb_texgen.c
+++ b/mesalib/src/mesa/tnl/t_vb_texgen.c
@@ -1,609 +1,609 @@
-/*
- * 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 "main/glheader.h"
-#include "main/colormac.h"
-#include "main/macros.h"
-#include "main/imports.h"
-#include "main/mtypes.h"
-
-#include "math/m_xform.h"
-
-#include "t_context.h"
-#include "t_pipeline.h"
-
-
-/***********************************************************************
- * Automatic texture coordinate generation (texgen) code.
- */
-
-
-struct texgen_stage_data;
-
-typedef void (*texgen_func)( GLcontext *ctx,
- struct texgen_stage_data *store,
- GLuint unit);
-
-
-struct texgen_stage_data {
-
- /* Per-texunit derived state.
- */
- GLuint TexgenSize[MAX_TEXTURE_COORD_UNITS];
- texgen_func TexgenFunc[MAX_TEXTURE_COORD_UNITS];
-
- /* Temporary values used in texgen.
- */
- GLfloat (*tmp_f)[3];
- GLfloat *tmp_m;
-
- /* Buffered outputs of the stage.
- */
- GLvector4f texcoord[MAX_TEXTURE_COORD_UNITS];
-};
-
-
-#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( GLcontext *ctx,
- struct texgen_stage_data *store,
- GLuint unit )
-{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + unit];
- GLvector4f *out = &store->texcoord[unit];
-
- 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( GLcontext *ctx,
- struct texgen_stage_data *store,
- GLuint unit )
-{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + unit];
- GLvector4f *out = &store->texcoord[unit];
- 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( GLcontext *ctx,
- struct texgen_stage_data *store,
- GLuint unit )
-{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + unit];
- GLvector4f *out = &store->texcoord[unit];
- 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( GLcontext *ctx,
- struct texgen_stage_data *store,
- GLuint unit )
-{
- TNLcontext *tnl = TNL_CONTEXT(ctx);
- struct vertex_buffer *VB = &tnl->vb;
- GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + unit];
- GLvector4f *out = &store->texcoord[unit];
- const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[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[unit]);
- 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( GLcontext *ctx,
- struct tnl_pipeline_stage *stage )
-{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);
- GLuint i;
-
- if (!ctx->Texture._TexGenEnabled || ctx->VertexProgram._Current)
- return GL_TRUE;
-
- for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) {
- struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
-
- if (texUnit->TexGenEnabled) {
-
- store->TexgenFunc[i]( ctx, store, i );
-
- VB->AttribPtr[VERT_ATTRIB_TEX0 + i] = &store->texcoord[i];
- }
- }
-
- return GL_TRUE;
-}
-
-
-static void validate_texgen_stage( GLcontext *ctx,
- struct tnl_pipeline_stage *stage )
-{
- struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);
- GLuint i;
-
- if (!ctx->Texture._TexGenEnabled || ctx->VertexProgram._Current)
- return;
-
- for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) {
- struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
-
- 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[i] = sz;
- store->TexgenFunc[i] = 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[i] = texgen_reflection_map_nv;
- }
- else if (texUnit->_GenFlags == TEXGEN_NORMAL_MAP_NV) {
- store->TexgenFunc[i] = texgen_normal_map_nv;
- }
- }
- else if (texUnit->TexGenEnabled == (S_BIT|T_BIT) &&
- texUnit->_GenFlags == TEXGEN_SPHERE_MAP) {
- store->TexgenFunc[i] = texgen_sphere_map;
- }
- }
- }
-}
-
-
-
-
-
-/* Called the first time stage->run() is invoked.
- */
-static GLboolean alloc_texgen_data( GLcontext *ctx,
- struct tnl_pipeline_stage *stage )
-{
- struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
- struct texgen_stage_data *store;
- GLuint i;
-
- stage->privatePtr = CALLOC(sizeof(*store));
- store = TEXGEN_STAGE_DATA(stage);
- if (!store)
- return GL_FALSE;
-
- for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
- _mesa_vector4f_alloc( &store->texcoord[i], 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);
- GLuint i;
-
- if (store) {
- for (i = 0 ; i < MAX_TEXTURE_COORD_UNITS ; i++)
- if (store->texcoord[i].data)
- _mesa_vector4f_free( &store->texcoord[i] );
-
-
- 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 */
-};
+/*
+ * 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 "main/glheader.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+#include "main/imports.h"
+#include "main/mtypes.h"
+
+#include "math/m_xform.h"
+
+#include "t_context.h"
+#include "t_pipeline.h"
+
+
+/***********************************************************************
+ * Automatic texture coordinate generation (texgen) code.
+ */
+
+
+struct texgen_stage_data;
+
+typedef void (*texgen_func)( struct gl_context *ctx,
+ struct texgen_stage_data *store,
+ GLuint unit);
+
+
+struct texgen_stage_data {
+
+ /* Per-texunit derived state.
+ */
+ GLuint TexgenSize[MAX_TEXTURE_COORD_UNITS];
+ texgen_func TexgenFunc[MAX_TEXTURE_COORD_UNITS];
+
+ /* Temporary values used in texgen.
+ */
+ GLfloat (*tmp_f)[3];
+ GLfloat *tmp_m;
+
+ /* Buffered outputs of the stage.
+ */
+ GLvector4f texcoord[MAX_TEXTURE_COORD_UNITS];
+};
+
+
+#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,
+ GLuint unit )
+{
+ struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+ GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + unit];
+ GLvector4f *out = &store->texcoord[unit];
+
+ 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,
+ GLuint unit )
+{
+ struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+ GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + unit];
+ GLvector4f *out = &store->texcoord[unit];
+ 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,
+ GLuint unit )
+{
+ struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+ GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + unit];
+ GLvector4f *out = &store->texcoord[unit];
+ 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,
+ GLuint unit )
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ struct vertex_buffer *VB = &tnl->vb;
+ GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + unit];
+ GLvector4f *out = &store->texcoord[unit];
+ const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[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[unit]);
+ 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);
+ GLuint i;
+
+ if (!ctx->Texture._TexGenEnabled || ctx->VertexProgram._Current)
+ return GL_TRUE;
+
+ for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) {
+ struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
+
+ if (texUnit->TexGenEnabled) {
+
+ store->TexgenFunc[i]( ctx, store, i );
+
+ VB->AttribPtr[VERT_ATTRIB_TEX0 + i] = &store->texcoord[i];
+ }
+ }
+
+ 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);
+ GLuint i;
+
+ if (!ctx->Texture._TexGenEnabled || ctx->VertexProgram._Current)
+ return;
+
+ for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) {
+ struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
+
+ 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[i] = sz;
+ store->TexgenFunc[i] = 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[i] = texgen_reflection_map_nv;
+ }
+ else if (texUnit->_GenFlags == TEXGEN_NORMAL_MAP_NV) {
+ store->TexgenFunc[i] = texgen_normal_map_nv;
+ }
+ }
+ else if (texUnit->TexGenEnabled == (S_BIT|T_BIT) &&
+ texUnit->_GenFlags == TEXGEN_SPHERE_MAP) {
+ store->TexgenFunc[i] = 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;
+ GLuint i;
+
+ stage->privatePtr = CALLOC(sizeof(*store));
+ store = TEXGEN_STAGE_DATA(stage);
+ if (!store)
+ return GL_FALSE;
+
+ for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
+ _mesa_vector4f_alloc( &store->texcoord[i], 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);
+ GLuint i;
+
+ if (store) {
+ for (i = 0 ; i < MAX_TEXTURE_COORD_UNITS ; i++)
+ if (store->texcoord[i].data)
+ _mesa_vector4f_free( &store->texcoord[i] );
+
+
+ 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 */
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 07:43:52 +0000