--- /dev/null
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+/**
+ * \file
+ * Vertex buffer drawing stage.
+ *
+ * \author José Fonseca <jrfonsec@tungstengraphics.com>
+ * \author Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+
+#include <assert.h>
+
+#include "pipe/draw/draw_vbuf.h"
+#include "pipe/draw/draw_private.h"
+#include "pipe/draw/draw_vertex.h"
+#include "pipe/p_util.h"
+
+
+/**
+ * Vertex buffer emit stage.
+ */
+struct vbuf_stage {
+ struct draw_stage stage; /**< This must be first (base class) */
+
+ struct vbuf_render *render;
+
+ /** Vertex size in bytes */
+ unsigned vertex_size;
+
+ /* FIXME: we have no guarantee that 'unsigned' is 32bit */
+
+ /** Vertices in hardware format */
+ unsigned *vertices;
+ unsigned *vertex_ptr;
+ unsigned max_vertices;
+ unsigned nr_vertices;
+
+ /** Indices */
+ ushort *indices;
+ unsigned max_indices;
+ unsigned nr_indices;
+
+ /** Pipe primitive */
+ unsigned prim;
+};
+
+
+/**
+ * Basically a cast wrapper.
+ */
+static INLINE struct vbuf_stage *
+vbuf_stage( struct draw_stage *stage )
+{
+ assert(stage);
+ return (struct vbuf_stage *)stage;
+}
+
+
+static void vbuf_flush_indices( struct draw_stage *stage );
+static void vbuf_flush_vertices( struct draw_stage *stage,
+ unsigned new_vertex_size );
+
+
+static INLINE boolean
+overflow( void *map, void *ptr, unsigned bytes, unsigned bufsz )
+{
+ unsigned long used = (unsigned long) ((char *)ptr - (char *)map);
+ return (used + bytes) > bufsz;
+}
+
+
+static INLINE void
+check_space( struct vbuf_stage *vbuf, unsigned nr )
+{
+ if (vbuf->nr_vertices + nr > vbuf->max_vertices )
+ vbuf_flush_vertices(&vbuf->stage, vbuf->vertex_size );
+
+ if (vbuf->nr_indices + nr > vbuf->max_indices )
+ vbuf_flush_indices(&vbuf->stage);
+}
+
+
+/**
+ * Extract the needed fields from vertex_header and emit i915 dwords.
+ * Recall that the vertices are constructed by the 'draw' module and
+ * have a couple of slots at the beginning (1-dword header, 4-dword
+ * clip pos) that we ignore here.
+ */
+static INLINE void
+emit_vertex( struct vbuf_stage *vbuf,
+ struct vertex_header *vertex )
+{
+ const struct vertex_info *vinfo = vbuf->render->get_vertex_info(vbuf->render);
+
+ uint i;
+ uint count = 0; /* for debug/sanity */
+
+// fprintf(stderr, "emit vertex %d to %p\n",
+// vbuf->nr_vertices, vbuf->vertex_ptr);
+
+ if(vertex->vertex_id != UNDEFINED_VERTEX_ID) {
+ if(vertex->vertex_id < vbuf->nr_vertices)
+ return;
+ else
+ fprintf(stderr, "Bad vertex id 0x%04x (>= 0x%04x)\n",
+ vertex->vertex_id, vbuf->nr_vertices);
+ return;
+ }
+
+ vertex->vertex_id = vbuf->nr_vertices++;
+
+ for (i = 0; i < vinfo->num_attribs; i++) {
+ switch (vinfo->format[i]) {
+ case FORMAT_OMIT:
+ /* no-op */
+ break;
+ case FORMAT_1F:
+ *vbuf->vertex_ptr++ = fui(vertex->data[i][0]);
+ count++;
+ break;
+ case FORMAT_2F:
+ *vbuf->vertex_ptr++ = fui(vertex->data[i][0]);
+ *vbuf->vertex_ptr++ = fui(vertex->data[i][1]);
+ count += 2;
+ break;
+ case FORMAT_3F:
+ *vbuf->vertex_ptr++ = fui(vertex->data[i][0]);
+ *vbuf->vertex_ptr++ = fui(vertex->data[i][1]);
+ *vbuf->vertex_ptr++ = fui(vertex->data[i][2]);
+ count += 3;
+ break;
+ case FORMAT_4F:
+ *vbuf->vertex_ptr++ = fui(vertex->data[i][0]);
+ *vbuf->vertex_ptr++ = fui(vertex->data[i][1]);
+ *vbuf->vertex_ptr++ = fui(vertex->data[i][2]);
+ *vbuf->vertex_ptr++ = fui(vertex->data[i][3]);
+ count += 4;
+ break;
+ case FORMAT_4UB:
+ *vbuf->vertex_ptr++ = pack_ub4(float_to_ubyte( vertex->data[i][2] ),
+ float_to_ubyte( vertex->data[i][1] ),
+ float_to_ubyte( vertex->data[i][0] ),
+ float_to_ubyte( vertex->data[i][3] ));
+ count += 1;
+ break;
+ default:
+ assert(0);
+ }
+ }
+ assert(count == vinfo->size);
+}
+
+
+static void
+vbuf_tri( struct draw_stage *stage,
+ struct prim_header *prim )
+{
+ struct vbuf_stage *vbuf = vbuf_stage( stage );
+ unsigned i;
+
+ check_space( vbuf, 3 );
+
+ for (i = 0; i < 3; i++) {
+ emit_vertex( vbuf, prim->v[i] );
+
+ vbuf->indices[vbuf->nr_indices++] = (ushort) prim->v[i]->vertex_id;
+ }
+}
+
+
+static void
+vbuf_line( struct draw_stage *stage,
+ struct prim_header *prim )
+{
+ struct vbuf_stage *vbuf = vbuf_stage( stage );
+ unsigned i;
+
+ check_space( vbuf, 2 );
+
+ for (i = 0; i < 2; i++) {
+ emit_vertex( vbuf, prim->v[i] );
+
+ vbuf->indices[vbuf->nr_indices++] = (ushort) prim->v[i]->vertex_id;
+ }
+}
+
+
+static void
+vbuf_point( struct draw_stage *stage,
+ struct prim_header *prim )
+{
+ struct vbuf_stage *vbuf = vbuf_stage( stage );
+
+ check_space( vbuf, 1 );
+
+ emit_vertex( vbuf, prim->v[0] );
+
+ vbuf->indices[vbuf->nr_indices++] = (ushort) prim->v[0]->vertex_id;
+}
+
+
+static void
+vbuf_first_tri( struct draw_stage *stage,
+ struct prim_header *prim )
+{
+ struct vbuf_stage *vbuf = vbuf_stage( stage );
+
+ vbuf_flush_indices( stage );
+ stage->tri = vbuf_tri;
+ stage->tri( stage, prim );
+ vbuf->prim = PIPE_PRIM_TRIANGLES;
+ vbuf->render->set_primitive(vbuf->render, PIPE_PRIM_TRIANGLES);
+}
+
+
+static void
+vbuf_first_line( struct draw_stage *stage,
+ struct prim_header *prim )
+{
+ struct vbuf_stage *vbuf = vbuf_stage( stage );
+
+ vbuf_flush_indices( stage );
+ stage->line = vbuf_line;
+ stage->line( stage, prim );
+ vbuf->prim = PIPE_PRIM_LINES;
+ vbuf->render->set_primitive(vbuf->render, PIPE_PRIM_LINES);
+}
+
+
+static void
+vbuf_first_point( struct draw_stage *stage,
+ struct prim_header *prim )
+{
+ struct vbuf_stage *vbuf = vbuf_stage( stage );
+
+ vbuf_flush_indices( stage );
+ stage->point = vbuf_point;
+ stage->point( stage, prim );
+ vbuf->prim = PIPE_PRIM_POINTS;
+ vbuf->render->set_primitive(vbuf->render, PIPE_PRIM_POINTS);
+}
+
+
+static void
+vbuf_flush_indices( struct draw_stage *stage )
+{
+ struct vbuf_stage *vbuf = vbuf_stage( stage );
+
+ if(!vbuf->nr_indices)
+ return;
+
+ assert(vbuf->vertex_ptr - vbuf->vertices ==
+ vbuf->nr_vertices * vbuf->vertex_size / sizeof(unsigned));
+
+ switch(vbuf->prim) {
+ case PIPE_PRIM_POINTS:
+ break;
+ case PIPE_PRIM_LINES:
+ assert(vbuf->nr_indices % 2 == 0);
+ break;
+ case PIPE_PRIM_TRIANGLES:
+ assert(vbuf->nr_indices % 3 == 0);
+ break;
+ default:
+ assert(0);
+ }
+
+ vbuf->render->draw(vbuf->render, vbuf->indices, vbuf->nr_indices);
+
+ vbuf->nr_indices = 0;
+}
+
+
+/**
+ * Flush existing vertex buffer and allocate a new one.
+ *
+ * XXX: We 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.
+ */
+static void
+vbuf_flush_vertices( struct draw_stage *stage,
+ unsigned new_vertex_size )
+{
+ struct vbuf_stage *vbuf = vbuf_stage( stage );
+
+ if(vbuf->vertices) {
+ vbuf_flush_indices(stage);
+
+ /* Reset temporary vertices ids */
+ if(vbuf->nr_vertices)
+ draw_reset_vertex_ids( vbuf->stage.draw );
+
+ /* Free the vertex buffer */
+ vbuf->render->release_vertices(vbuf->render,
+ vbuf->vertices,
+ vbuf->vertex_size,
+ vbuf->nr_vertices);
+ vbuf->nr_vertices = 0;
+ vbuf->vertex_ptr = vbuf->vertices = NULL;
+
+ }
+
+ assert(!vbuf->nr_indices);
+
+ /* Allocate a new vertex buffer */
+ vbuf->vertex_size = new_vertex_size;
+ vbuf->max_vertices = vbuf->render->max_vertex_buffer_bytes / vbuf->vertex_size;
+ vbuf->vertices = vbuf->render->allocate_vertices(vbuf->render,
+ vbuf->vertex_size,
+ vbuf->max_vertices) ;
+ vbuf->vertex_ptr = vbuf->vertices;
+}
+
+
+static void
+vbuf_begin( struct draw_stage *stage )
+{
+ struct vbuf_stage *vbuf = vbuf_stage(stage);
+ const struct vertex_info *vinfo = vbuf->render->get_vertex_info(vbuf->render);
+ unsigned vertex_size = vinfo->size * sizeof(float);
+
+ if(vbuf->vertex_size != vertex_size)
+ vbuf_flush_vertices(&vbuf->stage, vertex_size);
+}
+
+
+static void
+vbuf_end( struct draw_stage *stage )
+{
+ /* XXX: Overkill */
+ vbuf_flush_indices( stage );
+
+ stage->point = vbuf_first_point;
+ stage->line = vbuf_first_line;
+ stage->tri = vbuf_first_tri;
+}
+
+
+static void
+vbuf_reset_stipple_counter( struct draw_stage *stage )
+{
+}
+
+
+/**
+ * Create a new primitive vbuf/render stage.
+ */
+struct draw_stage *draw_vbuf_stage( struct draw_context *draw,
+ struct vbuf_render *render )
+{
+ struct vbuf_stage *vbuf = CALLOC_STRUCT(vbuf_stage);
+
+ vbuf->stage.draw = draw;
+ 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 = vbuf_reset_stipple_counter;
+
+ vbuf->render = render;
+
+ assert(render->max_indices < UNDEFINED_VERTEX_ID);
+ vbuf->max_indices = render->max_indices;
+ /* FIXME: free this memory on takedown */
+ vbuf->indices = MALLOC( vbuf->max_indices );
+
+ vbuf->vertices = NULL;
+ vbuf->vertex_ptr = vbuf->vertices;
+
+ return &vbuf->stage;
+}
--- /dev/null
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+/**
+ * \file
+ * Vertex buffer drawing stage.
+ *
+ * \author Keith Whitwell <keith@tungstengraphics.com>
+ * \author José Fonseca <jrfonsec@tungstengraphics.com>
+ */
+
+#ifndef DRAW_VBUF_H_
+#define DRAW_VBUF_H_
+
+
+#include "pipe/p_util.h"
+
+
+struct draw_context;
+struct vertex_info;
+
+
+/**
+ * Interface for hardware vertex buffer rendering.
+ */
+struct vbuf_render {
+
+ /**
+ * Driver limits. May be tuned lower to improve cache hits on
+ * index list.
+ */
+ unsigned max_indices;
+ unsigned max_vertex_buffer_bytes;
+
+ /**
+ * Get the hardware vertex format.
+ *
+ * XXX: have this in draw_context instead?
+ */
+ const struct vertex_info *(*get_vertex_info)( struct vbuf_render * );
+
+ /**
+ * Request a destination for vertices.
+ * Hardware renderers will use ttm memory, others will just malloc
+ * something.
+ */
+ void *(*allocate_vertices)( struct vbuf_render *,
+ ushort vertex_size,
+ ushort nr_vertices );
+
+ /**
+ * Notify the renderer of the current primitive when it changes.
+ * Prim is restricted to TRIANGLES, LINES and POINTS.
+ */
+ void (*set_primitive)( struct vbuf_render *, unsigned prim );
+
+ /**
+ * DrawElements, note indices are ushort:
+ */
+ void (*draw)( struct vbuf_render *,
+ const ushort *indices,
+ unsigned nr_indices );
+
+ /**
+ * Called when vbuf is done with this set of vertices:
+ */
+ void (*release_vertices)( struct vbuf_render *,
+ void *vertices,
+ unsigned vertex_size,
+ unsigned vertices_used );
+
+ void (*destroy)( struct vbuf_render * );
+};
+
+
+
+struct draw_stage *
+draw_vbuf_stage( struct draw_context *draw,
+ struct vbuf_render *render );
+
+
+#endif /*DRAW_VBUF_H_*/
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