6f973f3367
- remove input/output fields, input tracking removed. - remove state fields, the validate function now called on every statechange. - add an explicit 'create' function. Add in code to build vertex program to implement current t&l state. Still disabled, but turn on with a #define in t_vp_build.h.
612 lines
16 KiB
C
612 lines
16 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 6.1
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*
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* Copyright (C) 1999-2004 Brian Paul 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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* Authors:
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* Brian Paul
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* Keith Whitwell <keith@tungstengraphics.com>
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*/
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/*
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* Regarding GL_NV_texgen_reflection:
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*
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* Portions of this software may use or implement intellectual
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* property owned and licensed by NVIDIA Corporation. NVIDIA disclaims
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* any and all warranties with respect to such intellectual property,
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* including any use thereof or modifications thereto.
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*/
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#include "glheader.h"
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#include "colormac.h"
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#include "context.h"
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#include "macros.h"
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#include "imports.h"
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#include "mtypes.h"
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#include "math/m_xform.h"
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#include "t_context.h"
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#include "t_pipeline.h"
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/***********************************************************************
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* Automatic texture coordinate generation (texgen) code.
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*/
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struct texgen_stage_data;
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typedef void (*texgen_func)( GLcontext *ctx,
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struct texgen_stage_data *store,
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GLuint unit);
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struct texgen_stage_data {
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/* Per-texunit derived state.
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*/
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GLuint TexgenSize[MAX_TEXTURE_COORD_UNITS];
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texgen_func TexgenFunc[MAX_TEXTURE_COORD_UNITS];
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/* Temporary values used in texgen.
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*/
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GLfloat (*tmp_f)[3];
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GLfloat *tmp_m;
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/* Buffered outputs of the stage.
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*/
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GLvector4f texcoord[MAX_TEXTURE_COORD_UNITS];
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};
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#define TEXGEN_STAGE_DATA(stage) ((struct texgen_stage_data *)stage->privatePtr)
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static GLuint all_bits[5] = {
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0,
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VEC_SIZE_1,
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VEC_SIZE_2,
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VEC_SIZE_3,
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VEC_SIZE_4,
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};
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#define VEC_SIZE_FLAGS (VEC_SIZE_1|VEC_SIZE_2|VEC_SIZE_3|VEC_SIZE_4)
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#define TEXGEN_NEED_M (TEXGEN_SPHERE_MAP)
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#define TEXGEN_NEED_F (TEXGEN_SPHERE_MAP | \
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TEXGEN_REFLECTION_MAP_NV)
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static void build_m3( GLfloat f[][3], GLfloat m[],
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const GLvector4f *normal,
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const GLvector4f *eye )
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{
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GLuint stride = eye->stride;
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GLfloat *coord = (GLfloat *)eye->start;
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GLuint count = eye->count;
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const GLfloat *norm = normal->start;
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GLuint i;
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for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(norm,normal->stride)) {
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GLfloat u[3], two_nu, fx, fy, fz;
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COPY_3V( u, coord );
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NORMALIZE_3FV( u );
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two_nu = 2.0F * DOT3(norm,u);
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fx = f[i][0] = u[0] - norm[0] * two_nu;
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fy = f[i][1] = u[1] - norm[1] * two_nu;
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fz = f[i][2] = u[2] - norm[2] * two_nu;
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m[i] = fx * fx + fy * fy + (fz + 1.0F) * (fz + 1.0F);
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if (m[i] != 0.0F) {
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m[i] = 0.5F * _mesa_inv_sqrtf(m[i]);
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}
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}
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}
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static void build_m2( GLfloat f[][3], GLfloat m[],
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const GLvector4f *normal,
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const GLvector4f *eye )
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{
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GLuint stride = eye->stride;
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GLfloat *coord = eye->start;
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GLuint count = eye->count;
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GLfloat *norm = normal->start;
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GLuint i;
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for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(norm,normal->stride)) {
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GLfloat u[3], two_nu, fx, fy, fz;
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COPY_2V( u, coord );
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u[2] = 0;
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NORMALIZE_3FV( u );
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two_nu = 2.0F * DOT3(norm,u);
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fx = f[i][0] = u[0] - norm[0] * two_nu;
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fy = f[i][1] = u[1] - norm[1] * two_nu;
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fz = f[i][2] = u[2] - norm[2] * two_nu;
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m[i] = fx * fx + fy * fy + (fz + 1.0F) * (fz + 1.0F);
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if (m[i] != 0.0F) {
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m[i] = 0.5F * _mesa_inv_sqrtf(m[i]);
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}
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}
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}
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typedef void (*build_m_func)( GLfloat f[][3],
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GLfloat m[],
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const GLvector4f *normal,
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const GLvector4f *eye );
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static build_m_func build_m_tab[5] = {
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NULL,
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NULL,
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build_m2,
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build_m3,
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build_m3
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};
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/* This is unusual in that we respect the stride of the output vector
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* (f). This allows us to pass in either a texcoord vector4f, or a
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* temporary vector3f.
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*/
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static void build_f3( GLfloat *f,
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GLuint fstride,
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const GLvector4f *normal,
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const GLvector4f *eye )
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{
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GLuint stride = eye->stride;
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GLfloat *coord = eye->start;
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GLuint count = eye->count;
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GLfloat *norm = normal->start;
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GLuint i;
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for (i=0;i<count;i++) {
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GLfloat u[3], two_nu;
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COPY_3V( u, coord );
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NORMALIZE_3FV( u );
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two_nu = 2.0F * DOT3(norm,u);
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f[0] = u[0] - norm[0] * two_nu;
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f[1] = u[1] - norm[1] * two_nu;
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f[2] = u[2] - norm[2] * two_nu;
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STRIDE_F(coord,stride);
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STRIDE_F(f,fstride);
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STRIDE_F(norm, normal->stride);
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}
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}
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static void build_f2( GLfloat *f,
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GLuint fstride,
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const GLvector4f *normal,
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const GLvector4f *eye )
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{
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GLuint stride = eye->stride;
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GLfloat *coord = eye->start;
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GLuint count = eye->count;
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GLfloat *norm = normal->start;
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GLuint i;
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for (i=0;i<count;i++) {
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GLfloat u[3], two_nu;
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COPY_2V( u, coord );
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u[2] = 0;
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NORMALIZE_3FV( u );
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two_nu = 2.0F * DOT3(norm,u);
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f[0] = u[0] - norm[0] * two_nu;
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f[1] = u[1] - norm[1] * two_nu;
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f[2] = u[2] - norm[2] * two_nu;
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STRIDE_F(coord,stride);
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STRIDE_F(f,fstride);
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STRIDE_F(norm, normal->stride);
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}
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}
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typedef void (*build_f_func)( GLfloat *f,
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GLuint fstride,
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const GLvector4f *normal_vec,
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const GLvector4f *eye );
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/* Just treat 4-vectors as 3-vectors.
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*/
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static build_f_func build_f_tab[5] = {
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NULL,
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NULL,
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build_f2,
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build_f3,
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build_f3
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};
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/* Special case texgen functions.
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*/
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static void texgen_reflection_map_nv( GLcontext *ctx,
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struct texgen_stage_data *store,
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GLuint unit )
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{
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struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
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GLvector4f *in = VB->TexCoordPtr[unit];
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GLvector4f *out = &store->texcoord[unit];
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build_f_tab[VB->EyePtr->size]( out->start,
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out->stride,
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VB->NormalPtr,
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VB->EyePtr );
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out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
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out->count = VB->Count;
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out->size = MAX2(in->size, 3);
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if (in->size == 4)
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_mesa_copy_tab[0x8]( out, in );
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}
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static void texgen_normal_map_nv( GLcontext *ctx,
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struct texgen_stage_data *store,
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GLuint unit )
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{
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struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
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GLvector4f *in = VB->TexCoordPtr[unit];
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GLvector4f *out = &store->texcoord[unit];
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GLvector4f *normal = VB->NormalPtr;
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GLfloat (*texcoord)[4] = (GLfloat (*)[4])out->start;
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GLuint count = VB->Count;
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GLuint i;
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const GLfloat *norm = normal->start;
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for (i=0;i<count;i++, STRIDE_F(norm, normal->stride)) {
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texcoord[i][0] = norm[0];
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texcoord[i][1] = norm[1];
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texcoord[i][2] = norm[2];
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}
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out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
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out->count = count;
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out->size = MAX2(in->size, 3);
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if (in->size == 4)
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_mesa_copy_tab[0x8]( out, in );
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}
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static void texgen_sphere_map( GLcontext *ctx,
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struct texgen_stage_data *store,
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GLuint unit )
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{
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struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
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GLvector4f *in = VB->TexCoordPtr[unit];
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GLvector4f *out = &store->texcoord[unit];
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GLfloat (*texcoord)[4] = (GLfloat (*)[4]) out->start;
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GLuint count = VB->Count;
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GLuint i;
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GLfloat (*f)[3] = store->tmp_f;
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GLfloat *m = store->tmp_m;
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(build_m_tab[VB->EyePtr->size])( store->tmp_f,
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store->tmp_m,
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VB->NormalPtr,
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VB->EyePtr );
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out->size = MAX2(in->size,2);
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for (i=0;i<count;i++) {
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texcoord[i][0] = f[i][0] * m[i] + 0.5F;
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texcoord[i][1] = f[i][1] * m[i] + 0.5F;
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}
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out->count = count;
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out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_2;
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if (in->size > 2)
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_mesa_copy_tab[all_bits[in->size] & ~0x3]( out, in );
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}
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static void texgen( GLcontext *ctx,
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struct texgen_stage_data *store,
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GLuint unit )
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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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GLvector4f *in = VB->TexCoordPtr[unit];
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GLvector4f *out = &store->texcoord[unit];
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const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
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const GLvector4f *obj = VB->ObjPtr;
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const GLvector4f *eye = VB->EyePtr;
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const GLvector4f *normal = VB->NormalPtr;
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const GLfloat *m = store->tmp_m;
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const GLuint count = VB->Count;
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GLfloat (*texcoord)[4] = (GLfloat (*)[4])out->data;
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GLfloat (*f)[3] = store->tmp_f;
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GLuint copy;
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if (texUnit->_GenFlags & TEXGEN_NEED_M) {
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build_m_tab[eye->size]( store->tmp_f, store->tmp_m, normal, eye );
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} else if (texUnit->_GenFlags & TEXGEN_NEED_F) {
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build_f_tab[eye->size]( (GLfloat *)store->tmp_f, 3, normal, eye );
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}
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out->size = MAX2(in->size, store->TexgenSize[unit]);
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out->flags |= (in->flags & VEC_SIZE_FLAGS) | texUnit->TexGenEnabled;
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out->count = count;
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copy = (all_bits[in->size] & ~texUnit->TexGenEnabled);
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if (copy)
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_mesa_copy_tab[copy]( out, in );
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if (texUnit->TexGenEnabled & S_BIT) {
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GLuint i;
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switch (texUnit->GenModeS) {
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case GL_OBJECT_LINEAR:
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_mesa_dotprod_tab[obj->size]( (GLfloat *)out->data,
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sizeof(out->data[0]), obj,
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texUnit->ObjectPlaneS );
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break;
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case GL_EYE_LINEAR:
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_mesa_dotprod_tab[eye->size]( (GLfloat *)out->data,
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sizeof(out->data[0]), eye,
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texUnit->EyePlaneS );
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break;
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case GL_SPHERE_MAP:
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for (i = 0; i < count; i++)
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texcoord[i][0] = f[i][0] * m[i] + 0.5F;
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break;
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case GL_REFLECTION_MAP_NV:
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for (i=0;i<count;i++)
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texcoord[i][0] = f[i][0];
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break;
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case GL_NORMAL_MAP_NV: {
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const GLfloat *norm = normal->start;
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for (i=0;i<count;i++, STRIDE_F(norm, normal->stride)) {
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texcoord[i][0] = norm[0];
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}
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break;
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}
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default:
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_mesa_problem(ctx, "Bad S texgen");
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}
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}
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if (texUnit->TexGenEnabled & T_BIT) {
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GLuint i;
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switch (texUnit->GenModeT) {
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case GL_OBJECT_LINEAR:
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_mesa_dotprod_tab[obj->size]( &(out->data[0][1]),
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sizeof(out->data[0]), obj,
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texUnit->ObjectPlaneT );
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break;
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case GL_EYE_LINEAR:
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_mesa_dotprod_tab[eye->size]( &(out->data[0][1]),
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sizeof(out->data[0]), eye,
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texUnit->EyePlaneT );
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break;
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case GL_SPHERE_MAP:
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for (i = 0; i < count; i++)
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texcoord[i][1] = f[i][1] * m[i] + 0.5F;
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break;
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case GL_REFLECTION_MAP_NV:
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for (i=0;i<count;i++)
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texcoord[i][1] = f[i][1];
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break;
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case GL_NORMAL_MAP_NV: {
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const GLfloat *norm = normal->start;
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for (i=0;i<count;i++, STRIDE_F(norm, normal->stride)) {
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texcoord[i][1] = norm[1];
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}
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break;
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}
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default:
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_mesa_problem(ctx, "Bad T texgen");
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}
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}
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if (texUnit->TexGenEnabled & R_BIT) {
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GLuint i;
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switch (texUnit->GenModeR) {
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case GL_OBJECT_LINEAR:
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_mesa_dotprod_tab[obj->size]( &(out->data[0][2]),
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sizeof(out->data[0]), obj,
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texUnit->ObjectPlaneR );
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break;
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case GL_EYE_LINEAR:
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_mesa_dotprod_tab[eye->size]( &(out->data[0][2]),
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sizeof(out->data[0]), eye,
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texUnit->EyePlaneR );
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break;
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case GL_REFLECTION_MAP_NV:
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for (i=0;i<count;i++)
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texcoord[i][2] = f[i][2];
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break;
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case GL_NORMAL_MAP_NV: {
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const GLfloat *norm = normal->start;
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for (i=0;i<count;i++,STRIDE_F(norm, normal->stride)) {
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texcoord[i][2] = norm[2];
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}
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break;
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}
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default:
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_mesa_problem(ctx, "Bad R texgen");
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}
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}
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if (texUnit->TexGenEnabled & Q_BIT) {
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switch (texUnit->GenModeQ) {
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case GL_OBJECT_LINEAR:
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_mesa_dotprod_tab[obj->size]( &(out->data[0][3]),
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sizeof(out->data[0]), obj,
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texUnit->ObjectPlaneQ );
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break;
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case GL_EYE_LINEAR:
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_mesa_dotprod_tab[eye->size]( &(out->data[0][3]),
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sizeof(out->data[0]), eye,
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texUnit->EyePlaneQ );
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break;
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default:
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_mesa_problem(ctx, "Bad Q texgen");
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}
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}
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}
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static GLboolean run_texgen_stage( GLcontext *ctx,
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struct tnl_pipeline_stage *stage )
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{
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struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
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struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);
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GLuint i;
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if (!ctx->Texture._TexGenEnabled || ctx->VertexProgram._Enabled)
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return GL_TRUE;
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for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) {
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struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
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if (texUnit->TexGenEnabled) {
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store->TexgenFunc[i]( ctx, store, i );
|
|
|
|
VB->AttribPtr[VERT_ATTRIB_TEX0+i] =
|
|
VB->TexCoordPtr[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._Enabled)
|
|
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 */
|
|
};
|