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d3d10: Improve constant buffer stride and size_unpacked calculation.

This commit is contained in:
Rico Schüller 2009-11-01 13:42:22 +01:00 committed by Alexandre Julliard
parent e07e2ac3f7
commit bd83a874b3
1 changed files with 43 additions and 2 deletions
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45
dlls/d3d10/effect.c
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@ -1156,6 +1156,7 @@ static HRESULT parse_fx10_local_buffer(struct d3d10_effect_variable *l, const ch
DWORD offset;
D3D10_CBUFFER_TYPE d3d10_cbuffer_type;
HRESULT hr;
unsigned int stride = 0;
/* Generate our own type, it isn't in the fx blob. */
l->type = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*l->type));
@ -1283,9 +1284,49 @@ static HRESULT parse_fx10_local_buffer(struct d3d10_effect_variable *l, const ch
TRACE("Variable buffer offset: %u.\n", typem->buffer_offset);
l->type->size_packed += v->type->size_packed;
l->type->size_unpacked += v->type->size_unpacked;
/*
* For the complete constantbuffer the size_unpacked = stride,
* the stride is calculated like this:
*
* 1) if the constant buffer variables are packed with packoffset
* - stride = the highest used constant
* - the complete stride has to be a multiple of 0x10
*
* 2) if the constant buffer variables are NOT packed with packoffset
* - sum of unpacked size for all variables which fit in a 0x10 part
* - if the size exceeds a 0x10 part, the rest of the old part is skipped
* and a new part is started
* - if the variable is a struct it is always used a new part
* - the complete stride has to be a multiple of 0x10
*
* e.g.:
* 0x4, 0x4, 0x4, 0x8, 0x4, 0x14, 0x4
* part 0x10 0x10 0x20 -> 0x40
*/
if (v->flag & D3D10_EFFECT_VARIABLE_EXPLICIT_BIND_POINT)
{
if ((v->type->size_unpacked + v->buffer_offset) > stride)
{
stride = v->type->size_unpacked + v->buffer_offset;
}
}
else
{
if (v->type->type_class == D3D10_SVC_STRUCT)
{
stride = (stride + 0xf) & ~0xf;
}
if ( ((stride & 0xf) + v->type->size_unpacked) > 0x10)
{
stride = (stride + 0xf) & ~0xf;
}
stride += v->type->size_unpacked;
}
}
l->type->stride = l->type->size_unpacked = (l->type->size_unpacked + 0xf) & ~0xf;
l->type->stride = l->type->size_unpacked = (stride + 0xf) & ~0xf;
TRACE("Constant buffer:\n");
TRACE("\tType name: %s.\n", debugstr_a(l->type->name));