/**************************************************************************
*
* 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 "draw/draw_context.h"
#include "draw/draw_vbuf.h"
#include "util/u_debug.h"
#include "pipe/p_inlines.h"
#include "pipe/internal/p_winsys_screen.h"
#include "util/u_math.h"
#include "util/u_memory.h"
#include "i915_context.h"
#include "i915_reg.h"
#include "i915_winsys.h"
#include "i915_batch.h"
#include "i915_state.h"
/**
* Primitive renderer for i915.
*/
struct i915_vbuf_render {
struct vbuf_render base;
struct i915_context *i915;
/** Vertex size in bytes */
size_t vertex_size;
/** Software primitive */
unsigned prim;
/** Hardware primitive */
unsigned hwprim;
/** Genereate a vertex list */
unsigned fallback;
/* Stuff for the vbo */
struct pipe_buffer *vbo;
size_t vbo_size;
size_t vbo_offset;
void *vbo_ptr;
size_t vbo_alloc_size;
size_t vbo_max_used;
};
/**
* Basically a cast wrapper.
*/
static INLINE struct i915_vbuf_render *
i915_vbuf_render( struct vbuf_render *render )
{
assert(render);
return (struct i915_vbuf_render *)render;
}
static const struct vertex_info *
i915_vbuf_render_get_vertex_info( struct vbuf_render *render )
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
struct i915_context *i915 = i915_render->i915;
if (i915->dirty) {
/* make sure we have up to date vertex layout */
i915_update_derived( i915 );
}
return &i915->current.vertex_info;
}
static boolean
i915_vbuf_render_allocate_vertices( struct vbuf_render *render,
ushort vertex_size,
ushort nr_vertices )
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
struct i915_context *i915 = i915_render->i915;
struct pipe_screen *screen = i915->pipe.screen;
size_t size = (size_t)vertex_size * (size_t)nr_vertices;
/* FIXME: handle failure */
assert(!i915->vbo);
if (i915_render->vbo_size > size + i915_render->vbo_offset && !i915->vbo_flushed) {
} else {
i915->vbo_flushed = 0;
if (i915_render->vbo)
pipe_buffer_reference(&i915_render->vbo, NULL);
}
if (!i915_render->vbo) {
i915_render->vbo_size = MAX2(size, i915_render->vbo_alloc_size);
i915_render->vbo_offset = 0;
i915_render->vbo = pipe_buffer_create(screen,
64,
I915_BUFFER_USAGE_LIT_VERTEX,
i915_render->vbo_size);
}
i915_render->vertex_size = vertex_size;
i915->vbo = i915_render->vbo;
i915->vbo_offset = i915_render->vbo_offset;
i915->dirty |= I915_NEW_VBO;
if (!i915_render->vbo)
return FALSE;
return TRUE;
}
static void *
i915_vbuf_render_map_vertices( struct vbuf_render *render )
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
struct i915_context *i915 = i915_render->i915;
struct pipe_screen *screen = i915->pipe.screen;
if (i915->vbo_flushed)
debug_printf("%s bad vbo flush occured stalling on hw\n");
i915_render->vbo_ptr = pipe_buffer_map(screen,
i915_render->vbo,
PIPE_BUFFER_USAGE_CPU_WRITE);
return (unsigned char *)i915_render->vbo_ptr + i915->vbo_offset;
}
static void
i915_vbuf_render_unmap_vertices( struct vbuf_render *render,
ushort min_index,
ushort max_index )
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
struct i915_context *i915 = i915_render->i915;
struct pipe_screen *screen = i915->pipe.screen;
i915_render->vbo_max_used = MAX2(i915_render->vbo_max_used, i915_render->vertex_size * (max_index + 1));
pipe_buffer_unmap(screen, i915_render->vbo);
}
static boolean
i915_vbuf_render_set_primitive( struct vbuf_render *render,
unsigned prim )
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
i915_render->prim = prim;
switch(prim) {
case PIPE_PRIM_POINTS:
i915_render->hwprim = PRIM3D_POINTLIST;
i915_render->fallback = 0;
return TRUE;
case PIPE_PRIM_LINES:
i915_render->hwprim = PRIM3D_LINELIST;
i915_render->fallback = 0;
return TRUE;
case PIPE_PRIM_LINE_LOOP:
i915_render->hwprim = PRIM3D_LINELIST;
i915_render->fallback = PIPE_PRIM_LINE_LOOP;
return TRUE;
case PIPE_PRIM_LINE_STRIP:
i915_render->hwprim = PRIM3D_LINESTRIP;
i915_render->fallback = 0;
return TRUE;
case PIPE_PRIM_TRIANGLES:
i915_render->hwprim = PRIM3D_TRILIST;
i915_render->fallback = 0;
return TRUE;
case PIPE_PRIM_TRIANGLE_STRIP:
i915_render->hwprim = PRIM3D_TRISTRIP;
i915_render->fallback = 0;
return TRUE;
case PIPE_PRIM_TRIANGLE_FAN:
i915_render->hwprim = PRIM3D_TRIFAN;
i915_render->fallback = 0;
return TRUE;
case PIPE_PRIM_QUADS:
i915_render->hwprim = PRIM3D_TRILIST;
i915_render->fallback = PIPE_PRIM_QUADS;
return TRUE;
case PIPE_PRIM_QUAD_STRIP:
i915_render->hwprim = PRIM3D_TRILIST;
i915_render->fallback = PIPE_PRIM_QUAD_STRIP;
return TRUE;
case PIPE_PRIM_POLYGON:
i915_render->hwprim = PRIM3D_POLY;
i915_render->fallback = 0;
return TRUE;
default:
/* FIXME: Actually, can handle a lot more just fine... */
return FALSE;
}
}
/**
* Used for fallbacks in draw_arrays
*/
static void
draw_arrays_generate_indices( struct vbuf_render *render,
unsigned start, uint nr,
unsigned type )
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
struct i915_context *i915 = i915_render->i915;
unsigned i;
unsigned end = start + nr;
switch(type) {
case 0:
for (i = start; i+1 < end; i += 2)
OUT_BATCH( (i+0) | (i+1) << 16 );
if (i < end)
OUT_BATCH( i );
break;
case PIPE_PRIM_LINE_LOOP:
if (nr >= 2) {
for (i = start + 1; i < end; i++)
OUT_BATCH( (i-0) | (i+0) << 16 );
OUT_BATCH( (i-0) | ( start) << 16 );
}
break;
case PIPE_PRIM_QUADS:
for (i = start; i + 3 < end; i += 4) {
OUT_BATCH( (i+0) | (i+1) << 16 );
OUT_BATCH( (i+3) | (i+1) << 16 );
OUT_BATCH( (i+2) | (i+3) << 16 );
}
break;
case PIPE_PRIM_QUAD_STRIP:
for (i = start; i + 3 < end; i += 2) {
OUT_BATCH( (i+0) | (i+1) << 16 );
OUT_BATCH( (i+3) | (i+2) << 16 );
OUT_BATCH( (i+0) | (i+3) << 16 );
}
break;
default:
assert(0);
}
}
static unsigned
draw_arrays_calc_nr_indices( uint nr, unsigned type )
{
switch (type) {
case 0:
return nr;
case PIPE_PRIM_LINE_LOOP:
if (nr >= 2)
return nr * 2;
else
return 0;
case PIPE_PRIM_QUADS:
return (nr / 4) * 6;
case PIPE_PRIM_QUAD_STRIP:
return ((nr - 2) / 2) * 6;
default:
assert(0);
return 0;
}
}
static void
draw_arrays_fallback( struct vbuf_render *render,
unsigned start,
uint nr )
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
struct i915_context *i915 = i915_render->i915;
unsigned nr_indices;
if (i915->dirty)
i915_update_derived( i915 );
if (i915->hardware_dirty)
i915_emit_hardware_state( i915 );
nr_indices = draw_arrays_calc_nr_indices( nr, i915_render->fallback );
if (!nr_indices)
return;
if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
FLUSH_BATCH(NULL);
/* Make sure state is re-emitted after a flush:
*/
i915_update_derived( i915 );
i915_emit_hardware_state( i915 );
i915->vbo_flushed = 1;
if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
assert(0);
goto out;
}
}
OUT_BATCH( _3DPRIMITIVE |
PRIM_INDIRECT |
i915_render->hwprim |
PRIM_INDIRECT_ELTS |
nr_indices );
draw_arrays_generate_indices( render, start, nr, i915_render->fallback );
out:
return;
}
static void
i915_vbuf_render_draw_arrays( struct vbuf_render *render,
unsigned start,
uint nr )
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
if (i915_render->fallback) {
draw_arrays_fallback( render, start, nr );
return;
}
/* JB: TODO submit direct cmds */
draw_arrays_fallback( render, start, nr );
}
/**
* Used for normal and fallback emitting of indices
* If type is zero normal operation assumed.
*/
static void
draw_generate_indices( struct vbuf_render *render,
const ushort *indices,
uint nr_indices,
unsigned type )
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
struct i915_context *i915 = i915_render->i915;
unsigned i;
switch(type) {
case 0:
for (i = 0; i + 1 < nr_indices; i += 2) {
OUT_BATCH( indices[i] | indices[i+1] << 16 );
}
if (i < nr_indices) {
OUT_BATCH( indices[i] );
}
break;
case PIPE_PRIM_LINE_LOOP:
if (nr_indices >= 2) {
for (i = 1; i < nr_indices; i++)
OUT_BATCH( indices[i-1] | indices[i] << 16 );
OUT_BATCH( indices[i-1] | indices[0] << 16 );
}
break;
case PIPE_PRIM_QUADS:
for (i = 0; i + 3 < nr_indices; i += 4) {
OUT_BATCH( indices[i+0] | indices[i+1] << 16 );
OUT_BATCH( indices[i+3] | indices[i+1] << 16 );
OUT_BATCH( indices[i+2] | indices[i+3] << 16 );
}
break;
case PIPE_PRIM_QUAD_STRIP:
for (i = 0; i + 3 < nr_indices; i += 2) {
OUT_BATCH( indices[i+0] | indices[i+1] << 16 );
OUT_BATCH( indices[i+3] | indices[i+2] << 16 );
OUT_BATCH( indices[i+0] | indices[i+3] << 16 );
}
break;
default:
assert(0);
break;
}
}
static unsigned
draw_calc_nr_indices( uint nr_indices, unsigned type )
{
switch (type) {
case 0:
return nr_indices;
case PIPE_PRIM_LINE_LOOP:
if (nr_indices >= 2)
return nr_indices * 2;
else
return 0;
case PIPE_PRIM_QUADS:
return (nr_indices / 4) * 6;
case PIPE_PRIM_QUAD_STRIP:
return ((nr_indices - 2) / 2) * 6;
default:
assert(0);
return 0;
}
}
static void
i915_vbuf_render_draw( struct vbuf_render *render,
const ushort *indices,
uint nr_indices)
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
struct i915_context *i915 = i915_render->i915;
unsigned save_nr_indices;
save_nr_indices = nr_indices;
nr_indices = draw_calc_nr_indices( nr_indices, i915_render->fallback );
if (!nr_indices)
return;
if (i915->dirty)
i915_update_derived( i915 );
if (i915->hardware_dirty)
i915_emit_hardware_state( i915 );
if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
FLUSH_BATCH(NULL);
/* Make sure state is re-emitted after a flush:
*/
i915_update_derived( i915 );
i915_emit_hardware_state( i915 );
i915->vbo_flushed = 1;
if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
assert(0);
goto out;
}
}
OUT_BATCH( _3DPRIMITIVE |
PRIM_INDIRECT |
i915_render->hwprim |
PRIM_INDIRECT_ELTS |
nr_indices );
draw_generate_indices( render,
indices,
save_nr_indices,
i915_render->fallback );
out:
return;
}
static void
i915_vbuf_render_release_vertices( struct vbuf_render *render )
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
struct i915_context *i915 = i915_render->i915;
assert(i915->vbo);
i915_render->vbo_offset += i915_render->vbo_max_used;
i915_render->vbo_max_used = 0;
i915->vbo = NULL;
i915->dirty |= I915_NEW_VBO;
}
static void
i915_vbuf_render_destroy( struct vbuf_render *render )
{
struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
FREE(i915_render);
}
/**
* Create a new primitive render.
*/
static struct vbuf_render *
i915_vbuf_render_create( struct i915_context *i915 )
{
struct i915_vbuf_render *i915_render = CALLOC_STRUCT(i915_vbuf_render);
struct pipe_screen *screen = i915->pipe.screen;
i915_render->i915 = i915;
i915_render->base.max_vertex_buffer_bytes = 128*1024;
/* NOTE: it must be such that state and vertices indices fit in a single
* batch buffer.
*/
i915_render->base.max_indices = 16*1024;
i915_render->base.get_vertex_info = i915_vbuf_render_get_vertex_info;
i915_render->base.allocate_vertices = i915_vbuf_render_allocate_vertices;
i915_render->base.map_vertices = i915_vbuf_render_map_vertices;
i915_render->base.unmap_vertices = i915_vbuf_render_unmap_vertices;
i915_render->base.set_primitive = i915_vbuf_render_set_primitive;
i915_render->base.draw = i915_vbuf_render_draw;
i915_render->base.draw_arrays = i915_vbuf_render_draw_arrays;
i915_render->base.release_vertices = i915_vbuf_render_release_vertices;
i915_render->base.destroy = i915_vbuf_render_destroy;
i915_render->vbo_alloc_size = 128 * 4096;
i915_render->vbo_size = i915_render->vbo_alloc_size;
i915_render->vbo_offset = 0;
i915_render->vbo = pipe_buffer_create(screen,
64,
I915_BUFFER_USAGE_LIT_VERTEX,
i915_render->vbo_size);
i915_render->vbo_ptr = pipe_buffer_map(screen,
i915_render->vbo,
PIPE_BUFFER_USAGE_CPU_WRITE);
pipe_buffer_unmap(screen, i915_render->vbo);
return &i915_render->base;
}
/**
* Create a new primitive vbuf/render stage.
*/
struct draw_stage *i915_draw_vbuf_stage( struct i915_context *i915 )
{
struct vbuf_render *render;
struct draw_stage *stage;
render = i915_vbuf_render_create(i915);
if(!render)
return NULL;
stage = draw_vbuf_stage( i915->draw, render );
if(!stage) {
render->destroy(render);
return NULL;
}
/** TODO JB: this shouldn't be here */
draw_set_render(i915->draw, render);
return stage;
}