--- /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
+ * 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.
+ *
+ * XXX: work in progress
+ *
+ * \author José Fonseca <jrfonseca@tungstengraphics.com>
+ * \author Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+
+#include "pipe/draw/draw_private.h"
+#include "pipe/draw/draw_vertex.h"
+#include "pipe/p_util.h"
+
+#include "softpipe/sp_context.h"
+#include "softpipe/sp_headers.h"
+#include "softpipe/sp_quad.h"
+#include "softpipe/sp_prim_setup.h"
+
+#include "i915_context.h"
+
+
+static void vbuf_flush_elements( struct draw_stage *stage );
+
+
+#define VBUF_SIZE (64*1024)
+#define IBUF_SIZE (16*1024)
+
+
+/**
+ * Vertex buffer emit stage.
+ */
+struct vbuf_stage {
+ struct draw_stage stage; /**< This must be first (base class) */
+
+ 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;
+
+ struct i915_context *i915;
+};
+
+
+/**
+ * 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 )
+{
+ unsigned long used = (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;
+}
+
+
+static void emit_vertex( struct vbuf_stage *vbuf,
+ struct vertex_header *vertex )
+{
+// 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 );
+ memcpy(vbuf->vertex_ptr, vertex, vbuf->vertex_size);
+
+ vbuf->vertex_ptr += vbuf->vertex_size;
+}
+
+
+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 == 0xffff)
+ emit_vertex( vbuf, prim->v[i] );
+
+ vbuf->element_map[vbuf->nr_elements++] = 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;
+
+ if (!check_space( vbuf ))
+ vbuf_flush_elements( stage );
+
+ for (i = 0; i < 2; i++) {
+ if (prim->v[i]->vertex_id == 0xffff)
+ emit_vertex( vbuf, prim->v[i] );
+
+ vbuf->element_map[vbuf->nr_elements++] = prim->v[i]->vertex_id;
+ }
+}
+
+
+static void vbuf_point(struct draw_stage *stage,
+ struct prim_header *prim)
+{
+ struct vbuf_stage *vbuf = vbuf_stage( stage );
+
+ if (!check_space( vbuf ))
+ vbuf_flush_elements( stage );
+
+ if (prim->v[0]->vertex_id == 0xffff)
+ emit_vertex( vbuf, prim->v[0] );
+
+ vbuf->element_map[vbuf->nr_elements++] = 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_elements( stage );
+ stage->tri = vbuf_tri;
+ stage->tri( stage, prim );
+ vbuf->prim = 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_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 )
+{
+ struct vbuf_stage *vbuf = vbuf_stage( stage );
+
+ vbuf_flush_elements( stage );
+ stage->point = vbuf_point;
+ stage->point( stage, prim );
+ vbuf->prim = PIPE_PRIM_POINTS;
+}
+
+
+static void vbuf_draw( struct pipe_context *pipe,
+ unsigned prim,
+ const ushort *elements,
+ unsigned nr_elements,
+ const void *vertex_buffer,
+ unsigned nr_vertices )
+{
+ /* FIXME: */
+}
+
+
+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->i915->pipe,
+ vbuf->prim,
+ vbuf->element_map,
+ vbuf->nr_elements,
+ vbuf->vertex_map,
+ (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_vertex_cache_reset_vertex_ids( vbuf->i915->draw );
+ }
+
+ stage->tri = vbuf_first_tri;
+ stage->line = vbuf_first_line;
+ stage->point = vbuf_first_point;
+}
+
+
+static void vbuf_begin( struct draw_stage *stage )
+{
+ struct vbuf_stage *vbuf = vbuf_stage(stage);
+
+ vbuf->vertex_size = vbuf->i915->draw->vertex_info.size * sizeof(float);
+}
+
+
+static void vbuf_end( struct draw_stage *stage )
+{
+ /* Overkill.
+ */
+ vbuf_flush_elements( stage );
+}
+
+
+static void reset_stipple_counter( struct draw_stage *stage )
+{
+ /* XXX: This doesn't work.
+ */
+}
+
+
+/**
+ * Create a new primitive vbuf/render stage.
+ */
+struct draw_stage *i915_draw_vbuf_stage( struct i915_context *i915 )
+{
+ struct vbuf_stage *vbuf = CALLOC_STRUCT(vbuf_stage);
+
+ vbuf->i915 = i915;
+ vbuf->stage.draw = i915->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 = reset_stipple_counter;
+
+ vbuf->element_map = malloc( IBUF_SIZE );
+ vbuf->vertex_map = malloc( VBUF_SIZE );
+
+ vbuf->vertex_ptr = vbuf->vertex_map;
+
+ return &vbuf->stage;
+}
projects / mesa.git / commitdiff