draw_pipe_vbuf.c File Reference

Vertex buffer drawing stage. More...

Include dependency graph for draw_pipe_vbuf.c:

Go to the source code of this file.

Data Structures
struct	vbuf_stage
	Vertex buffer emit stage. More...
Functions
static struct vbuf_stage *	vbuf_stage (struct draw_stage *stage)
	Basically a cast wrapper.
static void	vbuf_flush_indices (struct vbuf_stage *vbuf)
static void	vbuf_flush_vertices (struct vbuf_stage *vbuf)
	Flush existing vertex buffer and allocate a new one.
static void	vbuf_alloc_vertices (struct vbuf_stage *vbuf)
static boolean	overflow (void *map, void *ptr, unsigned bytes, unsigned bufsz)
static void	check_space (struct vbuf_stage *vbuf, unsigned nr)
static ushort	emit_vertex (struct vbuf_stage *vbuf, struct vertex_header *vertex)
	Extract the needed fields from post-transformed vertex and emit a hardware(driver) vertex.
static void	vbuf_tri (struct draw_stage *stage, struct prim_header *prim)
static void	vbuf_line (struct draw_stage *stage, struct prim_header *prim)
static void	vbuf_point (struct draw_stage *stage, struct prim_header *prim)
static void	vbuf_set_prim (struct vbuf_stage *vbuf, uint prim)
	Set the prim type for subsequent vertices.
static void	vbuf_first_tri (struct draw_stage *stage, struct prim_header *prim)
static void	vbuf_first_line (struct draw_stage *stage, struct prim_header *prim)
static void	vbuf_first_point (struct draw_stage *stage, struct prim_header *prim)
static void	vbuf_flush (struct draw_stage *stage, unsigned flags)
static void	vbuf_reset_stipple_counter (struct draw_stage *stage)
static void	vbuf_destroy (struct draw_stage *stage)
struct draw_stage *	draw_vbuf_stage (struct draw_context *draw, struct vbuf_render *render)
	Create a new primitive vbuf/render stage.

---

Detailed Description

Vertex buffer drawing stage.

Author:

José Fonseca <jrfonsec@tungstengraphics.com>

Keith Whitwell <keith@tungstengraphics.com>

Definition in file draw_pipe_vbuf.c.

---

Function Documentation

static void check_space	(	struct vbuf_stage *	vbuf,
		unsigned	nr
	)			[static]

Definition at line 110 of file draw_pipe_vbuf.c.

References vbuf_stage::max_indices, vbuf_stage::max_vertices, vbuf_stage::nr_indices, vbuf_stage::nr_vertices, vbuf_alloc_vertices(), vbuf_flush_indices(), and vbuf_flush_vertices().

{
   if (vbuf->nr_vertices + nr > vbuf->max_vertices ) {
      vbuf_flush_vertices(vbuf);
      vbuf_alloc_vertices(vbuf);
   }

   if (vbuf->nr_indices + nr > vbuf->max_indices )
      vbuf_flush_indices(vbuf);
}

struct draw_stage* draw_vbuf_stage	(	struct draw_context *	draw,
		struct vbuf_render *	render
	)			[read]

Create a new primitive vbuf/render stage.

Definition at line 455 of file draw_pipe_vbuf.c.

References align_malloc(), vbuf_stage::cache, CALLOC_STRUCT, draw_stage::destroy, draw_stage::draw, draw_stage::flush, vbuf_stage::indices, draw_stage::line, MAX2, vbuf_render::max_indices, vbuf_stage::max_indices, draw_stage::point, vbuf_stage::render, draw_stage::reset_stipple_counter, vbuf_stage::stage, translate_cache_create(), draw_stage::tri, UNDEFINED_VERTEX_ID, vbuf_destroy(), vbuf_first_line(), vbuf_first_point(), vbuf_first_tri(), vbuf_flush(), vbuf_reset_stipple_counter(), vbuf_stage::vertex_ptr, and vbuf_stage::vertices.

{
   struct vbuf_stage *vbuf = CALLOC_STRUCT(vbuf_stage);
   if (vbuf == NULL)
      goto fail;
   
   vbuf->stage.draw = draw;
   vbuf->stage.point = vbuf_first_point;
   vbuf->stage.line = vbuf_first_line;
   vbuf->stage.tri = vbuf_first_tri;
   vbuf->stage.flush = vbuf_flush;
   vbuf->stage.reset_stipple_counter = vbuf_reset_stipple_counter;
   vbuf->stage.destroy = vbuf_destroy;
   
   vbuf->render = render;
   vbuf->max_indices = MAX2(render->max_indices, UNDEFINED_VERTEX_ID-1);

   vbuf->indices = (ushort *) align_malloc( vbuf->max_indices * 
                                            sizeof(vbuf->indices[0]), 
                                            16 );
   if (!vbuf->indices)
      goto fail;

   vbuf->cache = translate_cache_create();
   if (!vbuf->cache) 
      goto fail;
      
   
   vbuf->vertices = NULL;
   vbuf->vertex_ptr = vbuf->vertices;
   
   return &vbuf->stage;

 fail:
   if (vbuf)
      vbuf_destroy(&vbuf->stage);
   
   return NULL;
}

static ushort emit_vertex	(	struct vbuf_stage *	vbuf,
		struct vertex_header *	vertex
	)			[static]

Extract the needed fields from post-transformed vertex and emit a hardware(driver) vertex.

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. We only use the vertex->data[] fields.

Definition at line 132 of file draw_pipe_vbuf.c.

References vertex_header::data, draw_dump_emitted_vertex(), vbuf_stage::nr_vertices, translate::set_buffer, vbuf_stage::translate, UNDEFINED_VERTEX_ID, vertex_header::vertex_id, vbuf_stage::vertex_ptr, vbuf_stage::vertex_size, and vbuf_stage::vinfo.

{
   if(vertex->vertex_id == UNDEFINED_VERTEX_ID) {      
      /* Hmm - vertices are emitted one at a time - better make sure
       * set_buffer is efficient.  Consider a special one-shot mode for
       * translate.
       */
      /* Note: we really do want data[0] here, not data[pos]: 
       */
      vbuf->translate->set_buffer(vbuf->translate, 0, vertex->data[0], 0);
      vbuf->translate->run(vbuf->translate, 0, 1, vbuf->vertex_ptr);

      if (0) draw_dump_emitted_vertex(vbuf->vinfo, (uint8_t *)vbuf->vertex_ptr);
      
      vbuf->vertex_ptr += vbuf->vertex_size/4;
      vertex->vertex_id = vbuf->nr_vertices++;
   }

   return (ushort)vertex->vertex_id;
}

static boolean overflow	(	void *	map,
		void *	ptr,
		unsigned	bytes,
		unsigned	bufsz
	)			[static]

Definition at line 102 of file draw_pipe_vbuf.c.

{
   unsigned long used = (unsigned long) ((char *)ptr - (char *)map);
   return (used + bytes) > bufsz;
}

static void vbuf_alloc_vertices

(

struct vbuf_stage *

vbuf

)

[static]

Definition at line 386 of file draw_pipe_vbuf.c.

References vbuf_render::allocate_vertices, assert, vbuf_render::max_vertex_buffer_bytes, vbuf_stage::max_vertices, vbuf_stage::nr_indices, vbuf_stage::render, vbuf_stage::vertex_ptr, vbuf_stage::vertex_size, and vbuf_stage::vertices.

{
   assert(!vbuf->nr_indices);
   assert(!vbuf->vertices);
   
   /* Allocate a new vertex buffer */
   vbuf->max_vertices = vbuf->render->max_vertex_buffer_bytes / vbuf->vertex_size;

   /* even number */
   vbuf->max_vertices = vbuf->max_vertices & ~1;

   /* Must always succeed -- driver gives us a
    * 'max_vertex_buffer_bytes' which it guarantees it can allocate,
    * and it will flush itself if necessary to do so.  If this does
    * fail, we are basically without usable hardware.
    */
   vbuf->vertices = (uint *) vbuf->render->allocate_vertices(vbuf->render,
                                                             (ushort) vbuf->vertex_size,
                                                             (ushort) vbuf->max_vertices);
   vbuf->vertex_ptr = vbuf->vertices;
}

static void vbuf_destroy

(

struct draw_stage *

stage

)

[static]

Definition at line 435 of file draw_pipe_vbuf.c.

References align_free(), vbuf_stage::cache, vbuf_render::destroy, FREE, vbuf_stage::indices, vbuf_stage::render, translate_cache_destroy(), and vbuf_stage().

{
   struct vbuf_stage *vbuf = vbuf_stage( stage );

   if(vbuf->indices)
      align_free( vbuf->indices );
   
   if (vbuf->render)
      vbuf->render->destroy( vbuf->render );

   if (vbuf->cache)
      translate_cache_destroy(vbuf->cache);

   FREE( stage );
}

static void vbuf_first_line	(	struct draw_stage *	stage,
		struct prim_header *	prim
	)			[static]

Definition at line 316 of file draw_pipe_vbuf.c.

References draw_stage::line, PIPE_PRIM_LINES, vbuf_flush_indices(), vbuf_line(), vbuf_set_prim(), and vbuf_stage().

{
   struct vbuf_stage *vbuf = vbuf_stage( stage );

   vbuf_flush_indices( vbuf );
   stage->line = vbuf_line;
   vbuf_set_prim(vbuf, PIPE_PRIM_LINES);
   stage->line( stage, prim );
}

static void vbuf_first_point	(	struct draw_stage *	stage,
		struct prim_header *	prim
	)			[static]

Definition at line 329 of file draw_pipe_vbuf.c.

References PIPE_PRIM_POINTS, draw_stage::point, vbuf_flush_indices(), vbuf_point(), vbuf_set_prim(), and vbuf_stage().

{
   struct vbuf_stage *vbuf = vbuf_stage( stage );

   vbuf_flush_indices( vbuf );
   stage->point = vbuf_point;
   vbuf_set_prim(vbuf, PIPE_PRIM_POINTS);
   stage->point( stage, prim );
}

static void vbuf_first_tri	(	struct draw_stage *	stage,
		struct prim_header *	prim
	)			[static]

Definition at line 303 of file draw_pipe_vbuf.c.

References PIPE_PRIM_TRIANGLES, draw_stage::tri, vbuf_flush_indices(), vbuf_set_prim(), vbuf_stage(), and vbuf_tri().

{
   struct vbuf_stage *vbuf = vbuf_stage( stage );

   vbuf_flush_indices( vbuf );   
   stage->tri = vbuf_tri;
   vbuf_set_prim(vbuf, PIPE_PRIM_TRIANGLES);
   stage->tri( stage, prim );
}

static void vbuf_flush	(	struct draw_stage *	stage,
		unsigned	flags
	)			[static]

Definition at line 411 of file draw_pipe_vbuf.c.

References DRAW_FLUSH_BACKEND, draw_stage::line, draw_stage::point, draw_stage::tri, vbuf_first_line(), vbuf_first_point(), vbuf_first_tri(), vbuf_flush_indices(), vbuf_flush_vertices(), and vbuf_stage().

{
   struct vbuf_stage *vbuf = vbuf_stage( stage );

   vbuf_flush_indices( vbuf );

   stage->point = vbuf_first_point;
   stage->line = vbuf_first_line;
   stage->tri = vbuf_first_tri;

   if (flags & DRAW_FLUSH_BACKEND)
      vbuf_flush_vertices( vbuf );
}

static void vbuf_flush_indices

(

struct vbuf_stage *

vbuf

)

[static]

Definition at line 342 of file draw_pipe_vbuf.c.

References assert, vbuf_render::draw, vbuf_stage::indices, vbuf_stage::nr_indices, vbuf_stage::nr_vertices, vbuf_stage::render, vbuf_stage::vertex_ptr, vbuf_stage::vertex_size, and vbuf_stage::vertices.

{
   if(!vbuf->nr_indices)
      return;
   
   assert((uint) (vbuf->vertex_ptr - vbuf->vertices) == 
          vbuf->nr_vertices * vbuf->vertex_size / sizeof(unsigned));

   vbuf->render->draw(vbuf->render, vbuf->indices, vbuf->nr_indices);
   
   vbuf->nr_indices = 0;
}

static void vbuf_flush_vertices

(

struct vbuf_stage *

vbuf

)

[static]

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.

Definition at line 364 of file draw_pipe_vbuf.c.

References draw_stage::draw, draw_reset_vertex_ids(), vbuf_stage::max_vertices, vbuf_stage::nr_vertices, vbuf_render::release_vertices, vbuf_stage::render, vbuf_stage::stage, vbuf_flush_indices(), vbuf_stage::vertex_ptr, vbuf_stage::vertex_size, and vbuf_stage::vertices.

{
   if(vbuf->vertices) {      
      vbuf_flush_indices(vbuf);
      
      /* 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->max_vertices = vbuf->nr_vertices = 0;
      vbuf->vertex_ptr = vbuf->vertices = NULL;
      
   }
}

static void vbuf_line	(	struct draw_stage *	stage,
		struct prim_header *	prim
	)			[static]

Definition at line 171 of file draw_pipe_vbuf.c.

References check_space(), emit_vertex(), vbuf_stage::indices, vbuf_stage::nr_indices, prim_header::v, and vbuf_stage().

{
   struct vbuf_stage *vbuf = vbuf_stage( stage );
   unsigned i;

   check_space( vbuf, 2 );

   for (i = 0; i < 2; i++) {
      vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] );
   }   
}

static void vbuf_point	(	struct draw_stage *	stage,
		struct prim_header *	prim
	)			[static]

Definition at line 186 of file draw_pipe_vbuf.c.

References check_space(), emit_vertex(), vbuf_stage::indices, vbuf_stage::nr_indices, prim_header::v, and vbuf_stage().

{
   struct vbuf_stage *vbuf = vbuf_stage( stage );

   check_space( vbuf, 1 );

   vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[0] );
}

static void vbuf_reset_stipple_counter

(

struct draw_stage *

stage

)

[static]

Definition at line 427 of file draw_pipe_vbuf.c.

{
   /* XXX: Need to do something here for hardware with linestipple.
    */
   (void) stage;
}

static void vbuf_set_prim	(	struct vbuf_stage *	vbuf,
		uint	prim
	)			[static]

Set the prim type for subsequent vertices.

This may result in a new vertex size. The existing vbuffer (if any) will be flushed if needed and a new one allocated.

Definition at line 205 of file draw_pipe_vbuf.c.

References assert, vertex_info::attrib, vbuf_stage::cache, draw_stage::draw, translate_key::element, vertex_info::emit, EMIT_1F, EMIT_1F_PSIZE, EMIT_2F, EMIT_3F, EMIT_4F, EMIT_4UB, vbuf_render::get_vertex_info, translate_element::input_buffer, translate_element::input_format, translate_element::input_offset, translate::key, translate_key::nr_elements, vertex_info::num_attribs, translate_element::output_format, translate_element::output_offset, translate_key::output_stride, PIPE_FORMAT_B8G8R8A8_UNORM, PIPE_FORMAT_NONE, PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, pipe_rasterizer_state::point_size, vbuf_stage::point_size, draw_context::rasterizer, vbuf_stage::render, translate::set_buffer, vbuf_render::set_primitive, vertex_info::size, vertex_info::src_index, vbuf_stage::stage, vbuf_stage::translate, translate_cache_find(), translate_key_compare(), translate_key_sanitize(), vbuf_alloc_vertices(), vbuf_flush_vertices(), vbuf_stage::vertex_size, vbuf_stage::vertices, and vbuf_stage::vinfo.

{
   struct translate_key hw_key;
   unsigned dst_offset;
   unsigned i;

   vbuf->render->set_primitive(vbuf->render, prim);

   /* Must do this after set_primitive() above:
    * 
    * XXX: need some state managment to track when this needs to be
    * recalculated.  The driver should tell us whether there was a
    * state change.
    */
   vbuf->vinfo = vbuf->render->get_vertex_info(vbuf->render);

   if (vbuf->vertex_size != vbuf->vinfo->size * sizeof(float)) {
      vbuf_flush_vertices(vbuf);
      vbuf->vertex_size = vbuf->vinfo->size * sizeof(float);
   }

   /* Translate from pipeline vertices to hw vertices.
    */
   dst_offset = 0;

   for (i = 0; i < vbuf->vinfo->num_attribs; i++) {
      unsigned emit_sz = 0;
      unsigned src_buffer = 0;
      unsigned output_format;
      unsigned src_offset = (vbuf->vinfo->attrib[i].src_index * 4 * sizeof(float) );

      switch (vbuf->vinfo->attrib[i].emit) {
      case EMIT_4F:
         output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
         emit_sz = 4 * sizeof(float);
         break;
      case EMIT_3F:
         output_format = PIPE_FORMAT_R32G32B32_FLOAT;
         emit_sz = 3 * sizeof(float);
         break;
      case EMIT_2F:
         output_format = PIPE_FORMAT_R32G32_FLOAT;
         emit_sz = 2 * sizeof(float);
         break;
      case EMIT_1F:
         output_format = PIPE_FORMAT_R32_FLOAT;
         emit_sz = 1 * sizeof(float);
         break;
      case EMIT_1F_PSIZE:
         output_format = PIPE_FORMAT_R32_FLOAT;
         emit_sz = 1 * sizeof(float);
         src_buffer = 1;
         src_offset = 0;
         break;
      case EMIT_4UB:
         output_format = PIPE_FORMAT_B8G8R8A8_UNORM;
         emit_sz = 4 * sizeof(ubyte);
         break;
      default:
         assert(0);
         output_format = PIPE_FORMAT_NONE;
         emit_sz = 0;
         break;
      }
      
      hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
      hw_key.element[i].input_buffer = src_buffer;
      hw_key.element[i].input_offset = src_offset;
      hw_key.element[i].output_format = output_format;
      hw_key.element[i].output_offset = dst_offset;

      dst_offset += emit_sz;
   }

   hw_key.nr_elements = vbuf->vinfo->num_attribs;
   hw_key.output_stride = vbuf->vinfo->size * 4;

   /* Don't bother with caching at this stage:
    */
   if (!vbuf->translate ||
       translate_key_compare(&vbuf->translate->key, &hw_key) != 0) 
   {
      translate_key_sanitize(&hw_key);
      vbuf->translate = translate_cache_find(vbuf->cache, &hw_key);

      vbuf->translate->set_buffer(vbuf->translate, 1, &vbuf->point_size, 0);
   }

   vbuf->point_size = vbuf->stage.draw->rasterizer->point_size;

   /* Allocate new buffer?
    */
   if (!vbuf->vertices)
      vbuf_alloc_vertices(vbuf);
}

static struct vbuf_stage* vbuf_stage

(

struct draw_stage *

stage

)

[static, read]

Basically a cast wrapper.

Definition at line 89 of file draw_pipe_vbuf.c.

References assert.

{
   assert(stage);
   return (struct vbuf_stage *)stage;
}

static void vbuf_tri	(	struct draw_stage *	stage,
		struct prim_header *	prim
	)			[static]

Definition at line 156 of file draw_pipe_vbuf.c.

References check_space(), emit_vertex(), vbuf_stage::indices, vbuf_stage::nr_indices, prim_header::v, and vbuf_stage().

{
   struct vbuf_stage *vbuf = vbuf_stage( stage );
   unsigned i;

   check_space( vbuf, 3 );

   for (i = 0; i < 3; i++) {
      vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] );
   }
}

---