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- /* $Id: t_vb_texmat.c,v 1.10 2002/10/29 20:29:04 brianp 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 <keith@tungstengraphics.com>
- */
-
-
- #include "glheader.h"
- #include "colormac.h"
- #include "context.h"
- #include "macros.h"
- #include "imports.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->Texture._TexMatEnabled && !ctx->VertexProgram.Enabled) {
- GLuint flags = 0;
-
- for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++)
- if (ctx->Texture._TexMatEnabled & ENABLE_TEXMAT(i))
- flags |= VERT_BIT_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->Texture._TexMatEnabled & ENABLE_TEXMAT(i)) {
- if (stage->changed_inputs & VERT_BIT_TEX(i))
- (void) TransformRaw( &store->texcoord[i],
- ctx->TextureMatrixStack[i].Top,
- 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", /* name */
- _NEW_TEXTURE|_NEW_TEXTURE_MATRIX, /* check_state */
- _NEW_TEXTURE|_NEW_TEXTURE_MATRIX, /* run_state */
- GL_FALSE, /* active? */
- 0, /* inputs */
- 0, /* outputs */
- 0, /* changed_inputs */
- NULL, /* private data */
- free_texmat_data, /* destructor */
- check_texmat, /* check */
- alloc_texmat_data, /* run -- initially set to init */
- };
-