/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
* Copyright (C) 2009 VMware, Inc. 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
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
/**
* \file texgen.c
*
* glTexGen-related functions
*/
#include "main/glheader.h"
#include "main/context.h"
#include "main/enums.h"
#include "main/macros.h"
#include "main/texgen.h"
#include "main/texstate.h"
#include "math/m_matrix.h"
#include "main/dispatch.h"
/**
* Return texgen state for given coordinate
*/
static struct gl_texgen *
get_texgen(struct gl_context *ctx, struct gl_texture_unit *texUnit,
GLenum coord)
{
if (ctx->API == API_OPENGLES) {
return (coord == GL_TEXTURE_GEN_STR_OES)
? &texUnit->GenS : NULL;
}
switch (coord) {
case GL_S:
return &texUnit->GenS;
case GL_T:
return &texUnit->GenT;
case GL_R:
return &texUnit->GenR;
case GL_Q:
return &texUnit->GenQ;
default:
return NULL;
}
}
void GLAPIENTRY
_mesa_TexGenfv( GLenum coord, GLenum pname, const GLfloat *params )
{
struct gl_texture_unit *texUnit;
struct gl_texgen *texgen;
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
_mesa_debug(ctx, "glTexGen %s %s %.1f(%s)...\n",
_mesa_lookup_enum_by_nr(coord),
_mesa_lookup_enum_by_nr(pname),
*params,
_mesa_lookup_enum_by_nr((GLenum) (GLint) *params));
if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glTexGen(current unit)");
return;
}
texUnit = _mesa_get_current_tex_unit(ctx);
texgen = get_texgen(ctx, texUnit, coord);
if (!texgen) {
_mesa_error(ctx, GL_INVALID_ENUM, "glTexGen(coord)");
return;
}
switch (pname) {
case GL_TEXTURE_GEN_MODE:
{
GLenum mode = (GLenum) (GLint) params[0];
GLbitfield bit = 0x0;
if (texgen->Mode == mode)
return;
switch (mode) {
case GL_OBJECT_LINEAR:
bit = TEXGEN_OBJ_LINEAR;
break;
case GL_EYE_LINEAR:
bit = TEXGEN_EYE_LINEAR;
break;
case GL_SPHERE_MAP:
if (coord == GL_S || coord == GL_T)
bit = TEXGEN_SPHERE_MAP;
break;
case GL_REFLECTION_MAP_NV:
if (coord != GL_Q)
bit = TEXGEN_REFLECTION_MAP_NV;
break;
case GL_NORMAL_MAP_NV:
if (coord != GL_Q)
bit = TEXGEN_NORMAL_MAP_NV;
break;
default:
; /* nop */
}
if (!bit) {
_mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
return;
}
if (ctx->API != API_OPENGL_COMPAT
&& (bit & (TEXGEN_REFLECTION_MAP_NV | TEXGEN_NORMAL_MAP_NV)) == 0) {
_mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
return;
}
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
texgen->Mode = mode;
texgen->_ModeBit = bit;
}
break;
case GL_OBJECT_PLANE:
{
if (ctx->API != API_OPENGL_COMPAT) {
_mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
return;
}
if (TEST_EQ_4V(texgen->ObjectPlane, params))
return;
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
COPY_4FV(texgen->ObjectPlane, params);
}
break;
case GL_EYE_PLANE:
{
GLfloat tmp[4];
if (ctx->API != API_OPENGL_COMPAT) {
_mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
return;
}
/* Transform plane equation by the inverse modelview matrix */
if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
_math_matrix_analyse(ctx->ModelviewMatrixStack.Top);
}
_mesa_transform_vector(tmp, params,
ctx->ModelviewMatrixStack.Top->inv);
if (TEST_EQ_4V(texgen->EyePlane, tmp))
return;
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
COPY_4FV(texgen->EyePlane, tmp);
}
break;
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
return;
}
if (ctx->Driver.TexGen)
ctx->Driver.TexGen( ctx, coord, pname, params );
}
void GLAPIENTRY
_mesa_TexGeniv(GLenum coord, GLenum pname, const GLint *params )
{
GLfloat p[4];
p[0] = (GLfloat) params[0];
if (pname == GL_TEXTURE_GEN_MODE) {
p[1] = p[2] = p[3] = 0.0F;
}
else {
p[1] = (GLfloat) params[1];
p[2] = (GLfloat) params[2];
p[3] = (GLfloat) params[3];
}
_mesa_TexGenfv(coord, pname, p);
}
void GLAPIENTRY
_mesa_TexGend(GLenum coord, GLenum pname, GLdouble param )
{
GLfloat p[4];
p[0] = (GLfloat) param;
p[1] = p[2] = p[3] = 0.0F;
_mesa_TexGenfv( coord, pname, p );
}
void GLAPIENTRY
_es_GetTexGenfv(GLenum coord, GLenum pname, GLfloat *params)
{
_mesa_GetTexGenfv(GL_S, pname, params);
}
void GLAPIENTRY
_es_TexGenf(GLenum coord, GLenum pname, GLfloat param)
{
if (coord != GL_TEXTURE_GEN_STR_OES) {
GET_CURRENT_CONTEXT(ctx);
_mesa_error( ctx, GL_INVALID_ENUM, "glTexGen[fx](pname)" );
return;
}
/* set S, T, and R at the same time */
_mesa_TexGenf(GL_S, pname, param);
_mesa_TexGenf(GL_T, pname, param);
_mesa_TexGenf(GL_R, pname, param);
}
void GLAPIENTRY
_es_TexGenfv(GLenum coord, GLenum pname, const GLfloat *params)
{
if (coord != GL_TEXTURE_GEN_STR_OES) {
GET_CURRENT_CONTEXT(ctx);
_mesa_error( ctx, GL_INVALID_ENUM, "glTexGen[fx]v(pname)" );
return;
}
/* set S, T, and R at the same time */
_mesa_TexGenfv(GL_S, pname, params);
_mesa_TexGenfv(GL_T, pname, params);
_mesa_TexGenfv(GL_R, pname, params);
}
void GLAPIENTRY
_mesa_TexGendv(GLenum coord, GLenum pname, const GLdouble *params )
{
GLfloat p[4];
p[0] = (GLfloat) params[0];
if (pname == GL_TEXTURE_GEN_MODE) {
p[1] = p[2] = p[3] = 0.0F;
}
else {
p[1] = (GLfloat) params[1];
p[2] = (GLfloat) params[2];
p[3] = (GLfloat) params[3];
}
_mesa_TexGenfv( coord, pname, p );
}
void GLAPIENTRY
_mesa_TexGenf( GLenum coord, GLenum pname, GLfloat param )
{
GLfloat p[4];
p[0] = param;
p[1] = p[2] = p[3] = 0.0F;
_mesa_TexGenfv(coord, pname, p);
}
void GLAPIENTRY
_mesa_TexGeni( GLenum coord, GLenum pname, GLint param )
{
GLint p[4];
p[0] = param;
p[1] = p[2] = p[3] = 0;
_mesa_TexGeniv( coord, pname, p );
}
void GLAPIENTRY
_mesa_GetTexGendv( GLenum coord, GLenum pname, GLdouble *params )
{
struct gl_texture_unit *texUnit;
struct gl_texgen *texgen;
GET_CURRENT_CONTEXT(ctx);
if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGendv(current unit)");
return;
}
texUnit = _mesa_get_current_tex_unit(ctx);
texgen = get_texgen(ctx, texUnit, coord);
if (!texgen) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGendv(coord)");
return;
}
switch (pname) {
case GL_TEXTURE_GEN_MODE:
params[0] = ENUM_TO_DOUBLE(texgen->Mode);
break;
case GL_OBJECT_PLANE:
COPY_4V(params, texgen->ObjectPlane);
break;
case GL_EYE_PLANE:
COPY_4V(params, texgen->EyePlane);
break;
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
}
}
void GLAPIENTRY
_mesa_GetTexGenfv( GLenum coord, GLenum pname, GLfloat *params )
{
struct gl_texture_unit *texUnit;
struct gl_texgen *texgen;
GET_CURRENT_CONTEXT(ctx);
if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGenfv(current unit)");
return;
}
texUnit = _mesa_get_current_tex_unit(ctx);
texgen = get_texgen(ctx, texUnit, coord);
if (!texgen) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGenfv(coord)");
return;
}
switch (pname) {
case GL_TEXTURE_GEN_MODE:
params[0] = ENUM_TO_FLOAT(texgen->Mode);
break;
case GL_OBJECT_PLANE:
if (ctx->API != API_OPENGL_COMPAT) {
_mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(param)" );
return;
}
COPY_4V(params, texgen->ObjectPlane);
break;
case GL_EYE_PLANE:
if (ctx->API != API_OPENGL_COMPAT) {
_mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(param)" );
return;
}
COPY_4V(params, texgen->EyePlane);
break;
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
}
}
void GLAPIENTRY
_mesa_GetTexGeniv( GLenum coord, GLenum pname, GLint *params )
{
struct gl_texture_unit *texUnit;
struct gl_texgen *texgen;
GET_CURRENT_CONTEXT(ctx);
if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGeniv(current unit)");
return;
}
texUnit = _mesa_get_current_tex_unit(ctx);
texgen = get_texgen(ctx, texUnit, coord);
if (!texgen) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGeniv(coord)");
return;
}
switch (pname) {
case GL_TEXTURE_GEN_MODE:
params[0] = texgen->Mode;
break;
case GL_OBJECT_PLANE:
if (ctx->API != API_OPENGL_COMPAT) {
_mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(param)" );
return;
}
params[0] = (GLint) texgen->ObjectPlane[0];
params[1] = (GLint) texgen->ObjectPlane[1];
params[2] = (GLint) texgen->ObjectPlane[2];
params[3] = (GLint) texgen->ObjectPlane[3];
break;
case GL_EYE_PLANE:
if (ctx->API != API_OPENGL_COMPAT) {
_mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(param)" );
return;
}
params[0] = (GLint) texgen->EyePlane[0];
params[1] = (GLint) texgen->EyePlane[1];
params[2] = (GLint) texgen->EyePlane[2];
params[3] = (GLint) texgen->EyePlane[3];
break;
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
}
}