138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
/**************************************************************************
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*
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* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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* 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
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* 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
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors:
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* Keith Whitwell <keith@tungstengraphics.com>
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*/
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#include "util/u_memory.h"
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#include "draw/draw_private.h"
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#include "draw/draw_pipe.h"
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void
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draw_pipe_passthrough_point(struct draw_stage *stage, struct prim_header *header)
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{
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stage->next->point(stage->next, header);
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}
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void
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draw_pipe_passthrough_line(struct draw_stage *stage, struct prim_header *header)
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{
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stage->next->line(stage->next, header);
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}
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void
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draw_pipe_passthrough_tri(struct draw_stage *stage, struct prim_header *header)
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{
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stage->next->tri(stage->next, header);
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}
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/* This is only used for temporary verts.
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*/
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#define MAX_VERTEX_SIZE ((2 + PIPE_MAX_SHADER_OUTPUTS) * 4 * sizeof(float))
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/**
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* Allocate space for temporary post-transform vertices, such as for clipping.
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*/
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boolean draw_alloc_temp_verts( struct draw_stage *stage, unsigned nr )
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{
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assert(!stage->tmp);
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stage->tmp = NULL;
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stage->nr_tmps = nr;
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if (nr != 0)
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{
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unsigned i;
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ubyte *store = (ubyte *) MALLOC( MAX_VERTEX_SIZE * nr );
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if (store == NULL)
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return FALSE;
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stage->tmp = (struct vertex_header **) MALLOC( sizeof(struct vertex_header *) * nr );
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if (stage->tmp == NULL) {
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FREE(store);
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return FALSE;
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}
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for (i = 0; i < nr; i++)
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stage->tmp[i] = (struct vertex_header *)(store + i * MAX_VERTEX_SIZE);
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}
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return TRUE;
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}
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void draw_free_temp_verts( struct draw_stage *stage )
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{
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if (stage->tmp) {
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FREE( stage->tmp[0] );
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FREE( stage->tmp );
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stage->tmp = NULL;
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}
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}
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/* Reset vertex ids. This is basically a type of flush.
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*
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* Called only from draw_pipe_vbuf.c
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*/
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void draw_reset_vertex_ids(struct draw_context *draw)
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{
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struct draw_stage *stage = draw->pipeline.first;
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while (stage) {
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unsigned i;
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for (i = 0; i < stage->nr_tmps; i++)
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stage->tmp[i]->vertex_id = UNDEFINED_VERTEX_ID;
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stage = stage->next;
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}
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if (draw->pipeline.verts)
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{
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unsigned i;
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char *verts = draw->pipeline.verts;
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unsigned stride = draw->pipeline.vertex_stride;
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for (i = 0; i < draw->pipeline.vertex_count; i++) {
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((struct vertex_header *)verts)->vertex_id = UNDEFINED_VERTEX_ID;
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verts += stride;
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}
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}
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}
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