/************************************************************************** * * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. * 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, sub license, 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 (including the * next paragraph) 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 NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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. * **************************************************************************/ /** * Post-transform vertex buffering. This is an optional part of the * softpipe rendering pipeline. * Probably not desired in general, but useful for testing/debuggin. * Enabled/Disabled with SP_VBUF env var. * * Authors * Brian Paul */ #include "sp_context.h" #include "sp_prim_vbuf.h" #include "pipe/draw/draw_context.h" #include "pipe/draw/draw_private.h" #include "pipe/draw/draw_vbuf.h" #define SP_MAX_VBUF_INDEXES 1024 #define SP_MAX_VBUF_SIZE 4096 /** * Subclass of vbuf_render. */ struct softpipe_vbuf_render { struct vbuf_render base; struct softpipe_context *softpipe; uint prim; uint vertex_size; void *vertex_buffer; }; /** cast wrapper */ static struct softpipe_vbuf_render * softpipe_vbuf_render(struct vbuf_render *vbr) { return (struct softpipe_vbuf_render *) vbr; } static const struct vertex_info * sp_vbuf_get_vertex_info(struct vbuf_render *vbr) { struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr); /* XXX check for state changes? */ assert(!cvbr->softpipe->dirty ); return &cvbr->softpipe->vertex_info_vbuf; } static void * sp_vbuf_allocate_vertices(struct vbuf_render *vbr, ushort vertex_size, ushort nr_vertices) { struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr); assert(!cvbr->vertex_buffer); cvbr->vertex_buffer = align_malloc(vertex_size * nr_vertices, 16); cvbr->vertex_size = vertex_size; return cvbr->vertex_buffer; } static void sp_vbuf_release_vertices(struct vbuf_render *vbr, void *vertices, unsigned vertex_size, unsigned vertices_used) { struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr); align_free(vertices); assert(vertices == cvbr->vertex_buffer); cvbr->vertex_buffer = NULL; } static void sp_vbuf_set_primitive(struct vbuf_render *vbr, unsigned prim) { struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr); cvbr->prim = prim; } /** * Recalculate prim's determinant. * XXX is this needed? */ static void calc_det(struct prim_header *header) { /* Window coords: */ const float *v0 = header->v[0]->data[0]; const float *v1 = header->v[1]->data[0]; const float *v2 = header->v[2]->data[0]; /* edge vectors e = v0 - v2, f = v1 - v2 */ const float ex = v0[0] - v2[0]; const float ey = v0[1] - v2[1]; const float fx = v1[0] - v2[0]; const float fy = v1[1] - v2[1]; /* det = cross(e,f).z */ header->det = ex * fy - ey * fx; } static void sp_vbuf_draw(struct vbuf_render *vbr, const ushort *indices, uint nr_indices) { struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr); struct softpipe_context *softpipe = cvbr->softpipe; struct draw_stage *setup = softpipe->setup; struct prim_header prim; unsigned vertex_size = softpipe->vertex_info_vbuf.size * sizeof(float); unsigned i, j; void *vertex_buffer = cvbr->vertex_buffer; prim.det = 0; prim.reset_line_stipple = 0; prim.edgeflags = 0; prim.pad = 0; switch (cvbr->prim) { case PIPE_PRIM_TRIANGLES: for (i = 0; i < nr_indices; i += 3) { for (j = 0; j < 3; j++) prim.v[j] = (struct vertex_header *)((char *)vertex_buffer + indices[i+j] * vertex_size); calc_det(&prim); setup->tri( setup, &prim ); } break; case PIPE_PRIM_LINES: for (i = 0; i < nr_indices; i += 2) { for (j = 0; j < 2; j++) prim.v[j] = (struct vertex_header *)((char *)vertex_buffer + indices[i+j] * vertex_size); setup->line( setup, &prim ); } break; case PIPE_PRIM_POINTS: for (i = 0; i < nr_indices; i++) { prim.v[0] = (struct vertex_header *)((char *)vertex_buffer + indices[i] * vertex_size); setup->point( setup, &prim ); } break; } setup->flush( setup, 0 ); } static void sp_vbuf_destroy(struct vbuf_render *vbr) { struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr); cvbr->softpipe->vbuf_render = NULL; FREE(cvbr); } /** * Initialize the post-transform vertex buffer information for the given * context. */ void sp_init_vbuf(struct softpipe_context *sp) { assert(sp->draw); sp->vbuf_render = CALLOC_STRUCT(softpipe_vbuf_render); sp->vbuf_render->base.max_indices = SP_MAX_VBUF_INDEXES; sp->vbuf_render->base.max_vertex_buffer_bytes = SP_MAX_VBUF_SIZE; sp->vbuf_render->base.get_vertex_info = sp_vbuf_get_vertex_info; sp->vbuf_render->base.allocate_vertices = sp_vbuf_allocate_vertices; sp->vbuf_render->base.set_primitive = sp_vbuf_set_primitive; sp->vbuf_render->base.draw = sp_vbuf_draw; sp->vbuf_render->base.release_vertices = sp_vbuf_release_vertices; sp->vbuf_render->base.destroy = sp_vbuf_destroy; sp->vbuf_render->softpipe = sp; sp->vbuf = draw_vbuf_stage(sp->draw, &sp->vbuf_render->base); draw_set_rasterize_stage(sp->draw, sp->vbuf); }