*
* 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
**************************************************************************/
/**
- * Build post-transformation, post-clipping vertex buffers and element
- * lists by hooking into the end of the primitive pipeline and
- * manipulating the vertex_id field in the vertex headers.
- *
- * Keith Whitwell <keith@tungstengraphics.com>
+ * 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_headers.h"
-#include "sp_quad.h"
-#include "sp_prim_setup.h"
+#include "sp_prim_vbuf.h"
+#include "pipe/draw/draw_context.h"
#include "pipe/draw/draw_private.h"
-#include "pipe/draw/draw_vertex.h"
-#include "pipe/p_util.h"
-
-static void vbuf_flush_elements( struct draw_stage *stage );
+#include "pipe/draw/draw_vbuf.h"
-#define VBUF_SIZE (64*1024)
-#define IBUF_SIZE (16*1024)
+#define SP_MAX_VBUF_INDEXES 1024
+#define SP_MAX_VBUF_SIZE 4096
/**
- * Vertex buffer emit stage.
+ * Subclass of vbuf_render.
*/
-struct vbuf_stage {
- struct draw_stage stage; /**< This must be first (base class) */
-
- struct draw_context *draw_context;
- struct pipe_context *pipe;
- vbuf_draw_func draw;
-
- /* Vertices are passed in as an array of floats making up each
- * attribute in turn. Will eventually convert to hardware format
- * in this stage.
- */
- char *vertex_map;
- char *vertex_ptr;
- unsigned vertex_size;
- unsigned nr_vertices;
-
- unsigned max_vertices;
-
- ushort *element_map;
- unsigned nr_elements;
-
- unsigned prim;
-
-};
-
-/**
- * Basically a cast wrapper.
- */
-static INLINE struct vbuf_stage *vbuf_stage( struct draw_stage *stage )
-{
- return (struct vbuf_stage *)stage;
-}
-
-
-
-
-static boolean overflow( void *map, void *ptr, unsigned bytes, unsigned bufsz )
+struct softpipe_vbuf_render
{
- unsigned long used = (unsigned long) ((char *) ptr - (char *) map);
- return (used + bytes) > bufsz;
-}
-
-
-static boolean check_space( struct vbuf_stage *vbuf )
-{
- if (overflow( vbuf->vertex_map,
- vbuf->vertex_ptr,
- 4 * vbuf->vertex_size,
- VBUF_SIZE ))
- return FALSE;
-
-
- if (vbuf->nr_elements + 4 > IBUF_SIZE / sizeof(ushort) )
- return FALSE;
-
- return TRUE;
-}
+ struct vbuf_render base;
+ struct softpipe_context *softpipe;
+ uint prim;
+ uint vertex_size;
+ void *vertex_buffer;
+};
-static void emit_vertex( struct vbuf_stage *vbuf,
- struct vertex_header *vertex )
+/** cast wrapper */
+static struct softpipe_vbuf_render *
+softpipe_vbuf_render(struct vbuf_render *vbr)
{
-// fprintf(stderr, "emit vertex %d to %p\n",
-// vbuf->nr_vertices, vbuf->vertex_ptr);
-
- vertex->vertex_id = vbuf->nr_vertices++;
-
- //vbuf->emit_vertex( vbuf->vertex_ptr, vertex );
-
- /* Note: for softpipe, the vertex includes the vertex header info
- * such as clip flags and clip coords. In the future when vbuf is
- * always used, we could just copy the vertex attributes/data here.
- * The sp_prim_setup.c code doesn't use any of the vertex header info.
- */
- memcpy(vbuf->vertex_ptr, vertex, vbuf->vertex_size);
-
- vbuf->vertex_ptr += vbuf->vertex_size;
+ return (struct softpipe_vbuf_render *) vbr;
}
-/**
- *
- */
-static void vbuf_tri( struct draw_stage *stage,
- struct prim_header *prim )
-{
- struct vbuf_stage *vbuf = vbuf_stage( stage );
- unsigned i;
-
- if (!check_space( vbuf ))
- vbuf_flush_elements( stage );
-
- for (i = 0; i < 3; i++) {
- if (prim->v[i]->vertex_id == UNDEFINED_VERTEX_ID)
- emit_vertex( vbuf, prim->v[i] );
-
- vbuf->element_map[vbuf->nr_elements++] = (ushort) prim->v[i]->vertex_id;
- }
-}
-
-
-static void vbuf_line(struct draw_stage *stage,
- struct prim_header *prim)
+static const struct vertex_info *
+sp_vbuf_get_vertex_info(struct vbuf_render *vbr)
{
- struct vbuf_stage *vbuf = vbuf_stage( stage );
- unsigned i;
-
- if (!check_space( vbuf ))
- vbuf_flush_elements( stage );
-
- for (i = 0; i < 2; i++) {
- if (prim->v[i]->vertex_id == UNDEFINED_VERTEX_ID)
- emit_vertex( vbuf, prim->v[i] );
-
- vbuf->element_map[vbuf->nr_elements++] = (ushort) prim->v[i]->vertex_id;
- }
+ struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+ /* XXX check for state changes? */
+ return &cvbr->softpipe->vertex_info;
}
-static void vbuf_point(struct draw_stage *stage,
- struct prim_header *prim)
+static void *
+sp_vbuf_allocate_vertices(struct vbuf_render *vbr,
+ ushort vertex_size, ushort nr_vertices)
{
- struct vbuf_stage *vbuf = vbuf_stage( stage );
-
- if (!check_space( vbuf ))
- vbuf_flush_elements( stage );
-
- if (prim->v[0]->vertex_id == UNDEFINED_VERTEX_ID)
- emit_vertex( vbuf, prim->v[0] );
-
- vbuf->element_map[vbuf->nr_elements++] = (ushort) prim->v[0]->vertex_id;
+ 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 vbuf_first_tri( struct draw_stage *stage,
- struct prim_header *prim )
+static void
+sp_vbuf_release_vertices(struct vbuf_render *vbr, void *vertices,
+ unsigned vertex_size, unsigned vertices_used)
{
- struct vbuf_stage *vbuf = vbuf_stage( stage );
-
- vbuf_flush_elements( stage );
- stage->tri = vbuf_tri;
- stage->tri( stage, prim );
- vbuf->prim = PIPE_PRIM_TRIANGLES;
+ struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+ align_free(vertices);
+ assert(vertices == cvbr->vertex_buffer);
+ cvbr->vertex_buffer = NULL;
}
-static void vbuf_first_line( struct draw_stage *stage,
- struct prim_header *prim )
-{
- struct vbuf_stage *vbuf = vbuf_stage( stage );
-
- vbuf_flush_elements( stage );
- stage->line = vbuf_line;
- stage->line( stage, prim );
- vbuf->prim = PIPE_PRIM_LINES;
-}
-static void vbuf_first_point( struct draw_stage *stage,
- struct prim_header *prim )
+static void
+sp_vbuf_set_primitive(struct vbuf_render *vbr, unsigned prim)
{
- struct vbuf_stage *vbuf = vbuf_stage( stage );
-
- vbuf_flush_elements( stage );
- stage->point = vbuf_point;
- stage->point( stage, prim );
- vbuf->prim = PIPE_PRIM_POINTS;
+ struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+ cvbr->prim = prim;
}
-
-static void vbuf_flush_elements( struct draw_stage *stage )
-{
- struct vbuf_stage *vbuf = vbuf_stage( stage );
-
- if (vbuf->nr_elements) {
- /*
- fprintf(stderr, "%s (%d elts)\n", __FUNCTION__, vbuf->nr_elements);
- */
-
- /* Draw now or add to list of primitives???
- */
- vbuf->draw( vbuf->pipe,
- vbuf->prim,
- vbuf->element_map,
- vbuf->nr_elements,
- vbuf->vertex_map,
- (unsigned) (vbuf->vertex_ptr - vbuf->vertex_map) / vbuf->vertex_size );
-
- vbuf->nr_elements = 0;
-
- vbuf->vertex_ptr = vbuf->vertex_map;
- vbuf->nr_vertices = 0;
-
- /* Reset vertex ids? Actually, want to not do that unless our
- * vertex buffer is full. Would like separate
- * flush-on-index-full and flush-on-vb-full, but may raise
- * issues uploading vertices if the hardware wants to flush when
- * we flush.
- */
- draw_reset_vertex_ids( vbuf->draw_context );
+/**
+ * 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.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;
+
+ setup->begin( setup );
+
+ 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;
}
- stage->tri = vbuf_first_tri;
- stage->line = vbuf_first_line;
- stage->point = vbuf_first_point;
+ setup->end( setup );
}
-static void vbuf_begin( struct draw_stage *stage )
+static void
+sp_vbuf_destroy(struct vbuf_render *vbr)
{
- struct vbuf_stage *vbuf = vbuf_stage(stage);
- struct softpipe_context *softpipe = softpipe_context(vbuf->pipe);
-
- //vbuf->vertex_size = vbuf->draw_context->vertex_info.size * sizeof(float);
-
- vbuf->vertex_size = softpipe->vertex_info.size * sizeof(float);
+ struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+ cvbr->softpipe->vbuf_render = NULL;
+ FREE(cvbr);
}
-static void vbuf_end( struct draw_stage *stage )
-{
- /* Overkill.
- */
- vbuf_flush_elements( stage );
-}
-
-
-static void reset_stipple_counter( struct draw_stage *stage )
+/**
+ * Initialize the post-transform vertex buffer information for the given
+ * context.
+ */
+void
+sp_init_vbuf(struct softpipe_context *sp)
{
- /* XXX: This doesn't work.
- */
-}
+ assert(sp->draw);
+ sp->vbuf_render = CALLOC_STRUCT(softpipe_vbuf_render);
-static void vbuf_destroy( struct draw_stage *stage )
-{
- struct vbuf_stage *vbuf = vbuf_stage( stage );
+ sp->vbuf_render->base.max_indices = SP_MAX_VBUF_INDEXES;
+ sp->vbuf_render->base.max_vertex_buffer_bytes = SP_MAX_VBUF_SIZE;
- FREE( vbuf->element_map );
- FREE( vbuf->vertex_map );
- FREE( stage );
-}
+ 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;
-/**
- * Create a new primitive vbuf/render stage.
- */
-struct draw_stage *sp_draw_vbuf_stage( struct draw_context *draw_context,
- struct pipe_context *pipe,
- vbuf_draw_func draw )
-{
- struct vbuf_stage *vbuf = CALLOC_STRUCT(vbuf_stage);
-
- vbuf->stage.begin = vbuf_begin;
- vbuf->stage.point = vbuf_first_point;
- vbuf->stage.line = vbuf_first_line;
- vbuf->stage.tri = vbuf_first_tri;
- vbuf->stage.end = vbuf_end;
- vbuf->stage.reset_stipple_counter = reset_stipple_counter;
- vbuf->stage.destroy = vbuf_destroy;
-
- vbuf->pipe = pipe;
- vbuf->draw = draw;
- vbuf->draw_context = draw_context;
-
- vbuf->element_map = MALLOC( IBUF_SIZE );
- vbuf->vertex_map = MALLOC( VBUF_SIZE );
-
- vbuf->vertex_ptr = vbuf->vertex_map;
-
+ sp->vbuf = draw_vbuf_stage(sp->draw, &sp->vbuf_render->base);
- return &vbuf->stage;
+ draw_set_rasterize_stage(sp->draw, sp->vbuf);
}
const enum interp_mode colorInterp
= softpipe->rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
struct vertex_info *vinfo = &softpipe->vertex_info;
- boolean emitBack0 = FALSE, emitBack1 = FALSE, emitPsize = FALSE;
- uint front0 = 0, back0 = 0, front1 = 0, back1 = 0;
uint i;
- int src = 0;
memset(vinfo, 0, sizeof(*vinfo));
-
- if (fs->input_semantic_name[0] == TGSI_SEMANTIC_POSITION) {
- /* Need Z if depth test is enabled or the fragment program uses the
- * fragment position (XYZW).
- */
- }
-
softpipe->psize_slot = -1;
- /* always emit vertex pos */
- draw_emit_vertex_attr(vinfo, FORMAT_4F, INTERP_LINEAR, src++);
+ if (softpipe->vbuf) {
+ /* softpipe's setup/rasterizer stage expects vertex to have a header */
+ draw_emit_vertex_attr(vinfo, FORMAT_HEADER, INTERP_LINEAR, 0);
+ }
/*
* XXX I think we need to reconcile the vertex shader outputs with
switch (vs->output_semantic_name[i]) {
case TGSI_SEMANTIC_POSITION:
- /* vertex programs always emit position, but might not be
- * needed for fragment progs.
- */
- /* no-op */
+ draw_emit_vertex_attr(vinfo, FORMAT_4F, INTERP_LINEAR, i);
break;
case TGSI_SEMANTIC_COLOR:
if (vs->output_semantic_index[i] == 0) {
- front0 = draw_emit_vertex_attr(vinfo, FORMAT_4F, colorInterp, src++);
+ draw_emit_vertex_attr(vinfo, FORMAT_4F, colorInterp, i);
}
else {
assert(vs->output_semantic_index[i] == 1);
- front1 = draw_emit_vertex_attr(vinfo, FORMAT_4F, colorInterp, src++);
+ draw_emit_vertex_attr(vinfo, FORMAT_4F, colorInterp, i);
}
break;
case TGSI_SEMANTIC_BCOLOR:
- if (vs->output_semantic_index[i] == 0) {
- emitBack0 = TRUE;
- }
- else {
- assert(vs->output_semantic_index[i] == 1);
- emitBack1 = TRUE;
- }
+ /* no-op */
break;
case TGSI_SEMANTIC_FOG:
- draw_emit_vertex_attr(vinfo, FORMAT_1F, INTERP_PERSPECTIVE, src++);
+ draw_emit_vertex_attr(vinfo, FORMAT_1F, INTERP_PERSPECTIVE, i);
break;
case TGSI_SEMANTIC_PSIZE:
/* XXX only emit if drawing points or front/back polygon mode
* is point mode
*/
- emitPsize = TRUE;
+ softpipe->psize_slot
+ = draw_emit_vertex_attr(vinfo, FORMAT_1F, INTERP_CONSTANT, i);
break;
case TGSI_SEMANTIC_GENERIC:
/* this includes texcoords and varying vars */
- draw_emit_vertex_attr(vinfo, FORMAT_4F, INTERP_PERSPECTIVE, src++);
+ draw_emit_vertex_attr(vinfo, FORMAT_4F, INTERP_PERSPECTIVE, i);
break;
default:
draw_compute_vertex_size(vinfo);
softpipe->nr_frag_attrs = fs->num_inputs;
-
- /* We want these after all other attribs since they won't get passed
- * to the fragment shader. All prior vertex output attribs should match
- * up 1:1 with the fragment shader inputs.
- */
- if (emitBack0) {
- back0 = draw_emit_vertex_attr(vinfo, FORMAT_4F, colorInterp, src++);
- }
- if (emitBack1) {
- back1 = draw_emit_vertex_attr(vinfo, FORMAT_4F, colorInterp, src++);
- }
- if (emitPsize) {
- softpipe->psize_slot
- = draw_emit_vertex_attr(vinfo, FORMAT_1F, INTERP_CONSTANT, src++);
- }
-
- /* If the attributes have changed, tell the draw module about
- * the new vertex layout.
- */
- /* XXX we also need to do this when the shading mode (interp modes) change: */
- if (1/*vinfo->attr_mask != softpipe->attr_mask*/) {
- /*softpipe->attr_mask = vinfo->attr_mask;*/
-
- /*draw_set_vertex_info( softpipe->draw, vinfo);*/
-
- /*draw_set_twoside_attributes(softpipe->draw,
- front0, back0, front1, back1);
- */
- }
}
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