| 0,0 → 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)( 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 */ |
| }; |