diff options
author | Keith Whitwell <keith@tungstengraphics.com> | 2008-02-15 11:15:47 +0000 |
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committer | Keith Whitwell <keith@tungstengraphics.com> | 2008-02-15 11:15:47 +0000 |
commit | 6ac2c1cc0cd1253ba2014d459010032127f185ec (patch) | |
tree | 6348de9de19e7394800a983c8c614566d22b870b /src/gallium/drivers/softpipe/sp_prim_vbuf.c | |
parent | c04a7f8929d674971a472ffa4d3a31200c22aa5a (diff) | |
parent | 6d3831b11d9f5aaba61cc2fb8ade61437ad7c335 (diff) |
Merge commit 'origin/gallium-0.1' into gallium-0.1
Conflicts:
src/gallium/drivers/softpipe/sp_quad_fs.c
src/gallium/drivers/softpipe/sp_state.h
src/gallium/drivers/softpipe/sp_state_fs.c
Diffstat (limited to 'src/gallium/drivers/softpipe/sp_prim_vbuf.c')
-rw-r--r-- | src/gallium/drivers/softpipe/sp_prim_vbuf.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_prim_vbuf.c b/src/gallium/drivers/softpipe/sp_prim_vbuf.c new file mode 100644 index 0000000000..69bea8a8f5 --- /dev/null +++ b/src/gallium/drivers/softpipe/sp_prim_vbuf.c @@ -0,0 +1,221 @@ +/************************************************************************** + * + * 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 "draw/draw_context.h" +#include "draw/draw_private.h" +#include "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); + 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 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); +} |