/************************************************************************** * * 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_state.h" #include "sp_prim_vbuf.h" #include "sp_prim_setup.h" #include "sp_setup.h" #include "draw/draw_context.h" #include "draw/draw_vbuf.h" #include "util/u_memory.h" #define SP_MAX_VBUF_INDEXES 1024 #define SP_MAX_VBUF_SIZE 4096 typedef const float (*cptrf4)[4]; /** * 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); return softpipe_get_vbuf_vertex_info(cvbr->softpipe); } 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 boolean sp_vbuf_set_primitive(struct vbuf_render *vbr, unsigned prim) { struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr); /* XXX: break this dependency - make setup_context live under * softpipe, rename the old "setup" draw stage to something else. */ struct setup_context *setup_ctx = sp_draw_setup_context(cvbr->softpipe->setup); setup_prepare( setup_ctx ); cvbr->prim = prim; return TRUE; } static INLINE cptrf4 get_vert( const void *vertex_buffer, int index, int stride ) { return (cptrf4)((char *)vertex_buffer + index * stride); } static void sp_vbuf_draw(struct vbuf_render *vbr, const ushort *indices, uint nr) { struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr); struct softpipe_context *softpipe = cvbr->softpipe; unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float); unsigned i; const void *vertex_buffer = cvbr->vertex_buffer; /* XXX: break this dependency - make setup_context live under * softpipe, rename the old "setup" draw stage to something else. */ struct draw_stage *setup = softpipe->setup; struct setup_context *setup_ctx = sp_draw_setup_context(softpipe->setup); switch (cvbr->prim) { case PIPE_PRIM_POINTS: for (i = 0; i < nr; i++) { setup_point( setup_ctx, get_vert(vertex_buffer, indices[i-0], stride) ); } break; case PIPE_PRIM_LINES: for (i = 1; i < nr; i += 2) { setup_line( setup_ctx, get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } break; case PIPE_PRIM_LINE_STRIP: for (i = 1; i < nr; i ++) { setup_line( setup_ctx, get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } break; case PIPE_PRIM_LINE_LOOP: for (i = 1; i < nr; i ++) { setup_line( setup_ctx, get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } if (nr) { setup_line( setup_ctx, get_vert(vertex_buffer, indices[nr-1], stride), get_vert(vertex_buffer, indices[0], stride) ); } break; case PIPE_PRIM_TRIANGLES: for (i = 2; i < nr; i += 3) { setup_tri( setup_ctx, get_vert(vertex_buffer, indices[i-2], stride), get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride)); } break; case PIPE_PRIM_TRIANGLE_STRIP: for (i = 2; i < nr; i += 1) { setup_tri( setup_ctx, get_vert(vertex_buffer, indices[i+(i&1)-2], stride), get_vert(vertex_buffer, indices[i-(i&1)-1], stride), get_vert(vertex_buffer, indices[i-0], stride)); } break; case PIPE_PRIM_TRIANGLE_FAN: case PIPE_PRIM_POLYGON: for (i = 2; i < nr; i += 1) { setup_tri( setup_ctx, get_vert(vertex_buffer, indices[0], stride), get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride)); } break; case PIPE_PRIM_QUADS: for (i = 3; i < nr; i += 4) { setup_tri( setup_ctx, get_vert(vertex_buffer, indices[i-3], stride), get_vert(vertex_buffer, indices[i-2], stride), get_vert(vertex_buffer, indices[i-0], stride)); setup_tri( setup_ctx, get_vert(vertex_buffer, indices[i-2], stride), get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride)); } break; case PIPE_PRIM_QUAD_STRIP: for (i = 3; i < nr; i += 2) { setup_tri( setup_ctx, get_vert(vertex_buffer, indices[i-3], stride), get_vert(vertex_buffer, indices[i-2], stride), get_vert(vertex_buffer, indices[i-0], stride)); setup_tri( setup_ctx, get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-3], stride), get_vert(vertex_buffer, indices[i-0], stride)); } break; default: assert(0); } /* XXX: why are we calling this??? If we had to call something, it * would be a function in sp_setup.c: */ sp_draw_flush( setup ); } /** * This function is hit when the draw module is working in pass-through mode. * It's up to us to convert the vertex array into point/line/tri prims. */ static void sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr) { struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr); struct softpipe_context *softpipe = cvbr->softpipe; struct draw_stage *setup = softpipe->setup; const void *vertex_buffer = NULL; const unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float); unsigned i; struct setup_context *setup_ctx = sp_draw_setup_context(setup); vertex_buffer = (void *)get_vert(cvbr->vertex_buffer, start, stride); switch (cvbr->prim) { case PIPE_PRIM_POINTS: for (i = 0; i < nr; i++) { setup_point( setup_ctx, get_vert(vertex_buffer, i-0, stride) ); } break; case PIPE_PRIM_LINES: for (i = 1; i < nr; i += 2) { setup_line( setup_ctx, get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride) ); } break; case PIPE_PRIM_LINE_STRIP: for (i = 1; i < nr; i ++) { setup_line( setup_ctx, get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride) ); } break; case PIPE_PRIM_LINE_LOOP: for (i = 1; i < nr; i ++) { setup_line( setup_ctx, get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride) ); } if (nr) { setup_line( setup_ctx, get_vert(vertex_buffer, nr-1, stride), get_vert(vertex_buffer, 0, stride) ); } break; case PIPE_PRIM_TRIANGLES: for (i = 2; i < nr; i += 3) { setup_tri( setup_ctx, get_vert(vertex_buffer, i-2, stride), get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride)); } break; case PIPE_PRIM_TRIANGLE_STRIP: for (i = 2; i < nr; i += 1) { setup_tri( setup_ctx, get_vert(vertex_buffer, i+(i&1)-2, stride), get_vert(vertex_buffer, i-(i&1)-1, stride), get_vert(vertex_buffer, i-0, stride)); } break; case PIPE_PRIM_TRIANGLE_FAN: case PIPE_PRIM_POLYGON: for (i = 2; i < nr; i += 1) { setup_tri( setup_ctx, get_vert(vertex_buffer, 0, stride), get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride)); } break; case PIPE_PRIM_QUADS: for (i = 3; i < nr; i += 4) { setup_tri( setup_ctx, get_vert(vertex_buffer, i-3, stride), get_vert(vertex_buffer, i-2, stride), get_vert(vertex_buffer, i-0, stride)); setup_tri( setup_ctx, get_vert(vertex_buffer, i-2, stride), get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride)); } break; case PIPE_PRIM_QUAD_STRIP: for (i = 3; i < nr; i += 2) { setup_tri( setup_ctx, get_vert(vertex_buffer, i-3, stride), get_vert(vertex_buffer, i-2, stride), get_vert(vertex_buffer, i-0, stride)); setup_tri( setup_ctx, get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-3, stride), get_vert(vertex_buffer, i-0, stride)); } break; default: assert(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.draw_arrays = sp_vbuf_draw_arrays; 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); draw_set_render(sp->draw, &sp->vbuf_render->base); }