/*
* Copyright 2003 Tungsten Graphics, inc.
* 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
* on 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 THEIR 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.
*
* Authors:
* Keith Whitwell <keithw@tungstengraphics.com>
*/
#include "main/glheader.h"
#include "main/context.h"
#include "main/colormac.h"
#include "swrast/s_chan.h"
#include "t_context.h"
#include "t_vertex.h"
#define DBG 0
/* Build and manage clipspace/ndc/window vertices.
*/
static GLboolean match_fastpath( struct tnl_clipspace *vtx,
const struct tnl_clipspace_fastpath *fp)
{
GLuint j;
if (vtx->attr_count != fp->attr_count)
return GL_FALSE;
for (j = 0; j < vtx->attr_count; j++)
if (vtx->attr[j].format != fp->attr[j].format ||
vtx->attr[j].inputsize != fp->attr[j].size ||
vtx->attr[j].vertoffset != fp->attr[j].offset)
return GL_FALSE;
if (fp->match_strides) {
if (vtx->vertex_size != fp->vertex_size)
return GL_FALSE;
for (j = 0; j < vtx->attr_count; j++)
if (vtx->attr[j].inputstride != fp->attr[j].stride)
return GL_FALSE;
}
return GL_TRUE;
}
static GLboolean search_fastpath_emit( struct tnl_clipspace *vtx )
{
struct tnl_clipspace_fastpath *fp = vtx->fastpath;
for ( ; fp ; fp = fp->next) {
if (match_fastpath(vtx, fp)) {
vtx->emit = fp->func;
return GL_TRUE;
}
}
return GL_FALSE;
}
void _tnl_register_fastpath( struct tnl_clipspace *vtx,
GLboolean match_strides )
{
struct tnl_clipspace_fastpath *fastpath = CALLOC_STRUCT(tnl_clipspace_fastpath);
GLuint i;
fastpath->vertex_size = vtx->vertex_size;
fastpath->attr_count = vtx->attr_count;
fastpath->match_strides = match_strides;
fastpath->func = vtx->emit;
fastpath->attr =
malloc(vtx
->attr_count
* sizeof(fastpath
->attr
[0]));
for (i = 0; i < vtx->attr_count; i++) {
fastpath->attr[i].format = vtx->attr[i].format;
fastpath->attr[i].stride = vtx->attr[i].inputstride;
fastpath->attr[i].size = vtx->attr[i].inputsize;
fastpath->attr[i].offset = vtx->attr[i].vertoffset;
}
fastpath->next = vtx->fastpath;
vtx->fastpath = fastpath;
}
/***********************************************************************
* Build codegen functions or return generic ones:
*/
static void choose_emit_func( struct gl_context *ctx, GLuint count, GLubyte *dest)
{
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
struct tnl_clipspace_attr *a = vtx->attr;
const GLuint attr_count = vtx->attr_count;
GLuint j;
for (j = 0; j < attr_count; j++) {
GLvector4f *vptr = VB->AttribPtr[a[j].attrib];
a[j].inputstride = vptr->stride;
a[j].inputsize = vptr->size;
a[j].emit = a[j].insert[vptr->size - 1]; /* not always used */
}
vtx->emit = NULL;
/* Does this match an existing (hardwired, codegen or known-bad)
* fastpath?
*/
if (search_fastpath_emit(vtx)) {
/* Use this result. If it is null, then it is already known
* that the current state will fail for codegen and there is no
* point trying again.
*/
}
else if (vtx->codegen_emit) {
vtx->codegen_emit(ctx);
}
if (!vtx->emit) {
_tnl_generate_hardwired_emit(ctx);
}
/* Otherwise use the generic version:
*/
if (!vtx->emit)
vtx->emit = _tnl_generic_emit;
vtx->emit( ctx, count, dest );
}
static void choose_interp_func( struct gl_context *ctx,
GLfloat t,
GLuint edst, GLuint eout, GLuint ein,
GLboolean force_boundary )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
GLboolean unfilled = (ctx->Polygon.FrontMode != GL_FILL ||
ctx->Polygon.BackMode != GL_FILL);
GLboolean twosided = ctx->Light.Enabled && ctx->Light.Model.TwoSide;
if (vtx->need_extras && (twosided || unfilled)) {
vtx->interp = _tnl_generic_interp_extras;
} else {
vtx->interp = _tnl_generic_interp;
}
vtx->interp( ctx, t, edst, eout, ein, force_boundary );
}
static void choose_copy_pv_func( struct gl_context *ctx, GLuint edst, GLuint esrc )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
GLboolean unfilled = (ctx->Polygon.FrontMode != GL_FILL ||
ctx->Polygon.BackMode != GL_FILL);
GLboolean twosided = ctx->Light.Enabled && ctx->Light.Model.TwoSide;
if (vtx->need_extras && (twosided || unfilled)) {
vtx->copy_pv = _tnl_generic_copy_pv_extras;
} else {
vtx->copy_pv = _tnl_generic_copy_pv;
}
vtx->copy_pv( ctx, edst, esrc );
}
/***********************************************************************
* Public entrypoints, mostly dispatch to the above:
*/
/* Interpolate between two vertices to produce a third:
*/
void _tnl_interp( struct gl_context *ctx,
GLfloat t,
GLuint edst, GLuint eout, GLuint ein,
GLboolean force_boundary )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
vtx->interp( ctx, t, edst, eout, ein, force_boundary );
}
/* Copy colors from one vertex to another:
*/
void _tnl_copy_pv( struct gl_context *ctx, GLuint edst, GLuint esrc )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
vtx->copy_pv( ctx, edst, esrc );
}
/* Extract a named attribute from a hardware vertex. Will have to
* reverse any viewport transformation, swizzling or other conversions
* which may have been applied:
*/
void _tnl_get_attr( struct gl_context *ctx, const void *vin,
GLenum attr, GLfloat *dest )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
const struct tnl_clipspace_attr *a = vtx->attr;
const GLuint attr_count = vtx->attr_count;
GLuint j;
for (j = 0; j < attr_count; j++) {
if (a[j].attrib == attr) {
a[j].extract( &a[j], dest, (GLubyte *)vin + a[j].vertoffset );
return;
}
}
/* Else return the value from ctx->Current.
*/
if (attr == _TNL_ATTRIB_POINTSIZE) {
/* If the hardware vertex doesn't have point size then use size from
* struct gl_context. XXX this will be wrong if drawing attenuated points!
*/
dest[0] = ctx->Point.Size;
}
else {
memcpy( dest
, ctx
->Current.
Attrib[attr
], 4*sizeof(GLfloat
)); }
}
/* Complementary operation to the above.
*/
void _tnl_set_attr( struct gl_context *ctx, void *vout,
GLenum attr, const GLfloat *src )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
const struct tnl_clipspace_attr *a = vtx->attr;
const GLuint attr_count = vtx->attr_count;
GLuint j;
for (j = 0; j < attr_count; j++) {
if (a[j].attrib == attr) {
a[j].insert[4-1]( &a[j], (GLubyte *)vout + a[j].vertoffset, src );
return;
}
}
}
void *_tnl_get_vertex( struct gl_context *ctx, GLuint nr )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
return vtx->vertex_buf + nr * vtx->vertex_size;
}
void _tnl_invalidate_vertex_state( struct gl_context *ctx, GLuint new_state )
{
/* if two-sided lighting changes or filled/unfilled polygon state changes */
if (new_state & (_NEW_LIGHT | _NEW_POLYGON) ) {
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
vtx->new_inputs = ~0;
vtx->interp = choose_interp_func;
vtx->copy_pv = choose_copy_pv_func;
}
}
static void invalidate_funcs( struct tnl_clipspace *vtx )
{
vtx->emit = choose_emit_func;
vtx->interp = choose_interp_func;
vtx->copy_pv = choose_copy_pv_func;
vtx->new_inputs = ~0;
}
GLuint _tnl_install_attrs( struct gl_context *ctx, const struct tnl_attr_map *map,
GLuint nr, const GLfloat *vp,
GLuint unpacked_size )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
GLuint offset = 0;
GLuint i, j;
assert(nr
== 0 || map
[0].
attrib == VERT_ATTRIB_POS
);
vtx->new_inputs = ~0;
vtx->need_viewport = GL_FALSE;
if (vp) {
vtx->need_viewport = GL_TRUE;
}
for (j = 0, i = 0; i < nr; i++) {
const GLuint format = map[i].format;
if (format == EMIT_PAD) {
if (DBG)
printf("%d: pad %d, offset %d\n", i
, map[i].offset, offset);
offset += map[i].offset;
}
else {
GLuint tmpoffset;
if (unpacked_size)
tmpoffset = map[i].offset;
else
tmpoffset = offset;
if (vtx->attr_count != j ||
vtx->attr[j].attrib != map[i].attrib ||
vtx->attr[j].format != format ||
vtx->attr[j].vertoffset != tmpoffset) {
invalidate_funcs(vtx);
vtx->attr[j].attrib = map[i].attrib;
vtx->attr[j].format = format;
vtx->attr[j].vp = vp;
vtx->attr[j].insert = _tnl_format_info[format].insert;
vtx->attr[j].extract = _tnl_format_info[format].extract;
vtx->attr[j].vertattrsize = _tnl_format_info[format].attrsize;
vtx->attr[j].vertoffset = tmpoffset;
}
if (DBG)
printf("%d: %s, vp %p, offset %d\n", i
, _tnl_format_info[format].name, (void *)vp,
vtx->attr[j].vertoffset);
offset += _tnl_format_info[format].attrsize;
j++;
}
}
vtx->attr_count = j;
if (unpacked_size)
vtx->vertex_size = unpacked_size;
else
vtx->vertex_size = offset;
assert(vtx
->vertex_size
<= vtx
->max_vertex_size
); return vtx->vertex_size;
}
void _tnl_invalidate_vertices( struct gl_context *ctx, GLuint newinputs )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
vtx->new_inputs |= newinputs;
}
/* This event has broader use beyond this file - will move elsewhere
* and probably invoke a driver callback.
*/
void _tnl_notify_pipeline_output_change( struct gl_context *ctx )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
invalidate_funcs(vtx);
}
static void adjust_input_ptrs( struct gl_context *ctx, GLint diff)
{
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
struct tnl_clipspace_attr *a = vtx->attr;
const GLuint count = vtx->attr_count;
GLuint j;
diff -= 1;
for (j=0; j<count; ++j) {
register GLvector4f *vptr = VB->AttribPtr[a->attrib];
(a++)->inputptr += diff*vptr->stride;
}
}
static void update_input_ptrs( struct gl_context *ctx, GLuint start )
{
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
struct tnl_clipspace_attr *a = vtx->attr;
const GLuint count = vtx->attr_count;
GLuint j;
for (j = 0; j < count; j++) {
GLvector4f *vptr = VB->AttribPtr[a[j].attrib];
if (vtx->emit != choose_emit_func) {
assert(a
[j
].
inputstride == vptr
->stride
); assert(a
[j
].
inputsize == vptr
->size
); }
a[j].inputptr = ((GLubyte *)vptr->data) + start * vptr->stride;
}
if (a->vp) {
vtx->vp_scale[0] = a->vp[MAT_SX];
vtx->vp_scale[1] = a->vp[MAT_SY];
vtx->vp_scale[2] = a->vp[MAT_SZ];
vtx->vp_scale[3] = 1.0;
vtx->vp_xlate[0] = a->vp[MAT_TX];
vtx->vp_xlate[1] = a->vp[MAT_TY];
vtx->vp_xlate[2] = a->vp[MAT_TZ];
vtx->vp_xlate[3] = 0.0;
}
}
void _tnl_build_vertices( struct gl_context *ctx,
GLuint start,
GLuint end,
GLuint newinputs )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
update_input_ptrs( ctx, start );
vtx->emit( ctx, end - start,
(GLubyte *)(vtx->vertex_buf +
start * vtx->vertex_size));
}
/* Emit VB vertices start..end to dest. Note that VB vertex at
* postion start will be emitted to dest at position zero.
*/
void *_tnl_emit_vertices_to_buffer( struct gl_context *ctx,
GLuint start,
GLuint end,
void *dest )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
update_input_ptrs(ctx, start);
/* Note: dest should not be adjusted for non-zero 'start' values:
*/
vtx->emit( ctx, end - start, (GLubyte*) dest );
return (void *)((GLubyte *)dest + vtx->vertex_size * (end - start));
}
/* Emit indexed VB vertices start..end to dest. Note that VB vertex at
* postion start will be emitted to dest at position zero.
*/
void *_tnl_emit_indexed_vertices_to_buffer( struct gl_context *ctx,
const GLuint *elts,
GLuint start,
GLuint end,
void *dest )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
GLuint oldIndex;
GLubyte *cdest = dest;
update_input_ptrs(ctx, oldIndex = elts[start++]);
vtx->emit( ctx, 1, cdest );
cdest += vtx->vertex_size;
for (; start < end; ++start) {
adjust_input_ptrs(ctx, elts[start] - oldIndex);
oldIndex = elts[start];
vtx->emit( ctx, 1, cdest);
cdest += vtx->vertex_size;
}
return (void *) cdest;
}
void _tnl_init_vertices( struct gl_context *ctx,
GLuint vb_size,
GLuint max_vertex_size )
{
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
_tnl_install_attrs( ctx, NULL, 0, NULL, 0 );
vtx->need_extras = GL_TRUE;
if (max_vertex_size > vtx->max_vertex_size) {
_tnl_free_vertices( ctx );
vtx->max_vertex_size = max_vertex_size;
vtx->vertex_buf = _mesa_align_calloc(vb_size * max_vertex_size, 32 );
invalidate_funcs(vtx);
}
switch(CHAN_TYPE) {
case GL_UNSIGNED_BYTE:
vtx->chan_scale[0] = 255.0;
vtx->chan_scale[1] = 255.0;
vtx->chan_scale[2] = 255.0;
vtx->chan_scale[3] = 255.0;
break;
case GL_UNSIGNED_SHORT:
vtx->chan_scale[0] = 65535.0;
vtx->chan_scale[1] = 65535.0;
vtx->chan_scale[2] = 65535.0;
vtx->chan_scale[3] = 65535.0;
break;
default:
vtx->chan_scale[0] = 1.0;
vtx->chan_scale[1] = 1.0;
vtx->chan_scale[2] = 1.0;
vtx->chan_scale[3] = 1.0;
break;
}
vtx->identity[0] = 0.0;
vtx->identity[1] = 0.0;
vtx->identity[2] = 0.0;
vtx->identity[3] = 1.0;
vtx->codegen_emit = NULL;
#ifdef USE_SSE_ASM
if (!_mesa_getenv("MESA_NO_CODEGEN"))
vtx->codegen_emit = _tnl_generate_sse_emit;
#endif
}
void _tnl_free_vertices( struct gl_context *ctx )
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
if (tnl) {
struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
struct tnl_clipspace_fastpath *fp, *tmp;
if (vtx->vertex_buf) {
_mesa_align_free(vtx->vertex_buf);
vtx->vertex_buf = NULL;
}
for (fp = vtx->fastpath ; fp ; fp = tmp) {
tmp = fp->next;
/* KW: At the moment, fp->func is constrained to be allocated by
* _mesa_exec_alloc(), as the hardwired fastpaths in
* t_vertex_generic.c are handled specially. It would be nice
* to unify them, but this probably won't change until this
* module gets another overhaul.
*/
_mesa_exec_free((void *) fp->func);
}
vtx->fastpath = NULL;
}
}