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/* $Id: t_vb_texmat.c,v 1.4 2001/03/12 00:48:44 gareth Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2001 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:
* Keith Whitwell <keithw@valinux.com>
*/
#include "glheader.h"
#include "colormac.h"
#include "context.h"
#include "macros.h"
#include "mem.h"
#include "mmath.h"
#include "mtypes.h"
#include "math/m_xform.h"
#include "t_context.h"
#include "t_pipeline.h"
/* Is there any real benefit seperating texmat from texgen? It means
* we need two lots of intermediate storage. Any changes to
* _NEW_TEXTURE will invalidate both sets -- it's only on changes to
* *only* _NEW_TEXTURE_MATRIX that texgen survives but texmat doesn't.
*
* However, the seperation of this code from the complex texgen stuff
* is very appealing.
*/
struct texmat_stage_data {
GLvector4f texcoord[MAX_TEXTURE_UNITS];
};
#define TEXMAT_STAGE_DATA(stage) ((struct texmat_stage_data *)stage->privatePtr)
static void check_texmat( GLcontext *ctx, struct gl_pipeline_stage *stage )
{
GLuint i;
stage->active = 0;
if (ctx->_Enabled & ENABLE_TEXMAT_ANY) {
GLuint flags = 0;
for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++)
if (ctx->_Enabled & ENABLE_TEXMAT(i))
flags |= VERT_TEX(i);
stage->active = 1;
stage->inputs = flags;
stage->outputs = flags;
}
}
static GLboolean run_texmat_stage( GLcontext *ctx,
struct gl_pipeline_stage *stage )
{
struct texmat_stage_data *store = TEXMAT_STAGE_DATA(stage);
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
GLuint i;
/* ENABLE_TEXMAT implies that the texture matrix is not the
* identity, so we don't have to check that here.
*/
for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++)
if (ctx->_Enabled & ENABLE_TEXMAT(i)) {
if (stage->changed_inputs & VERT_TEX(i))
(void) TransformRaw( &store->texcoord[i], &ctx->TextureMatrix[i],
VB->TexCoordPtr[i]);
VB->TexCoordPtr[i] = &store->texcoord[i];
}
return GL_TRUE;
}
/* Called the first time stage->run() is invoked.
*/
static GLboolean alloc_texmat_data( GLcontext *ctx,
struct gl_pipeline_stage *stage )
{
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
struct texmat_stage_data *store;
GLuint i;
stage->privatePtr = CALLOC(sizeof(*store));
store = TEXMAT_STAGE_DATA(stage);
if (!store)
return GL_FALSE;
for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++)
_mesa_vector4f_alloc( &store->texcoord[i], 0, VB->Size, 32 );
/* Now run the stage.
*/
stage->run = run_texmat_stage;
return stage->run( ctx, stage );
}
static void free_texmat_data( struct gl_pipeline_stage *stage )
{
struct texmat_stage_data *store = TEXMAT_STAGE_DATA(stage);
GLuint i;
if (store) {
for (i = 0 ; i < MAX_TEXTURE_UNITS ; i++)
if (store->texcoord[i].data)
_mesa_vector4f_free( &store->texcoord[i] );
FREE( store );
stage->privatePtr = 0;
}
}
const struct gl_pipeline_stage _tnl_texture_transform_stage =
{
"texture transform",
_NEW_TEXTURE|_NEW_TEXTURE_MATRIX,
_NEW_TEXTURE|_NEW_TEXTURE_MATRIX,
0,0,0, /* active, inputs, outputs */
0,0, /* changed_inputs, private */
free_texmat_data, /* destructor */
check_texmat, /* check */
alloc_texmat_data, /* run -- initially set to init */
};
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