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Split too-large draw commands.

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Use the vbo_split_ functionality to split incoming drawing command
to fit within the fixed-size buffers used by software t&l module.
This commit is contained in:
Keith Whitwell
2007-01-15 13:54:08 +00:00
parent 2421b25dd7
commit 5464cd0a60
1 changed files with 101 additions and 25 deletions
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126
src/mesa/tnl/t_draw.c
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@@ -32,6 +32,7 @@
#include "state.h"
#include "mtypes.h"
#include "macros.h"
#include "enums.h"
#include "t_context.h"
#include "t_pipeline.h"
@@ -182,7 +183,7 @@ static GLboolean *_tnl_import_edgeflag( GLcontext *ctx,
static void bind_inputs( GLcontext *ctx,
const struct gl_client_array *inputs[],
GLint start, GLint end,
GLint min_index, GLint max_index,
struct gl_buffer_object **bo,
GLuint *nr_bo )
{
@@ -214,15 +215,20 @@ static void bind_inputs( GLcontext *ctx,
ptr = inputs[i]->Ptr;
/* Just make sure the array is floating point, otherwise convert to
* temporary storage. Rebase arrays so that 'start' becomes
* temporary storage. Rebase arrays so that 'min_index' becomes
* element zero.
*
* XXX: remove the GLvector4f type at some stage and just use
* client arrays.
*/
_tnl_import_array(ctx, i, start, end, inputs[i], ptr);
_tnl_import_array(ctx, i, min_index, max_index, inputs[i], ptr);
}
/* We process only the vertices between min & max index:
*/
VB->Count = max_index - min_index;
/* Legacy pointers -- remove one day.
*/
VB->ObjPtr = VB->AttribPtr[_TNL_ATTRIB_POS];
@@ -256,10 +262,11 @@ static void bind_inputs( GLcontext *ctx,
/* Translate indices to GLuints and store in VB->Elts.
*/
static void bind_indicies( GLcontext *ctx,
const struct _mesa_index_buffer *ib,
struct gl_buffer_object **bo,
GLuint *nr_bo)
static void bind_indices( GLcontext *ctx,
const struct _mesa_index_buffer *ib,
GLuint min_index,
struct gl_buffer_object **bo,
GLuint *nr_bo)
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct vertex_buffer *VB = &tnl->vb;
@@ -282,7 +289,7 @@ static void bind_indicies( GLcontext *ctx,
ptr = ADD_POINTERS(ib->obj->Pointer, ib->ptr);
if (ib->type == GL_UNSIGNED_INT) {
if (ib->type == GL_UNSIGNED_INT && min_index == 0) {
VB->Elts = (GLuint *) ptr;
VB->Elts += ib->rebase;
}
@@ -291,22 +298,54 @@ static void bind_indicies( GLcontext *ctx,
VB->Elts = elts;
switch (ib->type) {
case GL_UNSIGNED_INT: {
const GLuint *in = ((GLuint *)ptr) + ib->rebase;
for (i = 0; i < ib->count; i++)
*elts++ = *in++ - min_index;
break;
}
case GL_UNSIGNED_SHORT: {
const GLushort *in = ((GLushort *)ptr) + ib->rebase;
for (i = 0; i < ib->count; i++)
*elts++ = *in++;
*elts++ = (GLuint)(*in++) - min_index;
break;
}
case GL_UNSIGNED_BYTE: {
const GLubyte *in = ((GLubyte *)ptr) + ib->rebase;
for (i = 0; i < ib->count; i++)
*elts++ = *in++;
*elts++ = (GLuint)(*in++) - min_index;
break;
}
}
}
}
static void bind_prims( GLcontext *ctx,
const struct _mesa_prim *prim,
GLuint nr_prims,
GLuint min_index )
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct vertex_buffer *VB = &tnl->vb;
GLuint i;
if (min_index != 0) {
struct _mesa_prim *tmp = (struct _mesa_prim *)get_space(ctx, nr_prims * sizeof(*prim));
for (i = 0; i < nr_prims; i++) {
tmp[i] = prim[i];
tmp[i].start -= min_index;
}
VB->Primitive = tmp;
}
else {
VB->Primitive = prim;
}
VB->PrimitiveCount = nr_prims;
}
static void unmap_vbos( GLcontext *ctx,
struct gl_buffer_object **bo,
GLuint nr_bo )
@@ -335,26 +374,63 @@ void _tnl_draw_prims( GLcontext *ctx,
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct vertex_buffer *VB = &tnl->vb;
GLint max = VB->Size;
GLuint i;
/* May need to map a vertex buffer object for every attribute plus
* one for the index buffer.
#ifdef TEST_SPLIT
max = 8 + MAX_CLIPPED_VERTICES;
#endif
assert(max_index > min_index);
assert(!(max_index & 0x80000000));
VB->Elts = NULL;
#if 0
_mesa_printf("%s %d..%d\n", __FUNCTION__, min_index, max_index);
for (i = 0; i < nr_prims; i++)
_mesa_printf("prim %d: %s start %d count %d\n", i,
_mesa_lookup_enum_by_nr(prim[i].mode),
prim[i].start,
prim[i].count);
#endif
/* The software TNL pipeline has a fixed amount of storage for
* vertices and it is necessary to split incoming drawing commands
* if they exceed that limit.
*/
struct gl_buffer_object *bo[VERT_ATTRIB_MAX + 1];
GLuint nr_bo = 0;
if (max_index - min_index >= max - MAX_CLIPPED_VERTICES) {
struct split_limits limits;
limits.max_verts = max - MAX_CLIPPED_VERTICES;
limits.max_vb_size = ~0;
limits.max_indices = ~0;
/* Binding inputs may imply mapping some vertex buffer objects.
* They will need to be unmapped below.
*/
bind_inputs(ctx, arrays, min_index, max_index, bo, &nr_bo);
bind_indicies(ctx, ib, bo, &nr_bo);
/* This will split the buffers one way or another and
* recursively call back into this function.
*/
vbo_split_prims( ctx, arrays, prim, nr_prims, ib,
min_index, max_index,
_tnl_draw_prims,
&limits );
}
else {
/* May need to map a vertex buffer object for every attribute plus
* one for the index buffer.
*/
struct gl_buffer_object *bo[VERT_ATTRIB_MAX + 1];
GLuint nr_bo = 0;
VB->Primitive = prim;
VB->PrimitiveCount = nr_prims;
VB->Count = max_index - min_index;
/* Binding inputs may imply mapping some vertex buffer objects.
* They will need to be unmapped below.
*/
bind_inputs(ctx, arrays, min_index, max_index+1, bo, &nr_bo);
bind_indices(ctx, ib, min_index, bo, &nr_bo);
bind_prims(ctx, prim, nr_prims, VB->Elts ? 0 : min_index );
TNL_CONTEXT(ctx)->Driver.RunPipeline(ctx);
TNL_CONTEXT(ctx)->Driver.RunPipeline(ctx);
unmap_vbos(ctx, bo, nr_bo);
free_space(ctx);
unmap_vbos(ctx, bo, nr_bo);
free_space(ctx);
}
}