static INLINE CGparameter find_param_from_semantic(
CGparameter param, const char *sem)
{
while (param)
{
if (cgGetParameterType(param) == CG_STRUCT)
{
CGparameter ret = find_param_from_semantic(
cgGetFirstStructParameter(param), sem);
if (ret)
return ret;
}
else
{
if (cgGetParameterSemantic(param) &&
!strcmp(sem, cgGetParameterSemantic(param)) &&
cgGetParameterDirection(param) == CG_IN &&
cgGetParameterVariability(param) == CG_VARYING &&
validate_param_name(cgGetParameterName(param)))
return param;
}
param = cgGetNextParameter(param);
}
return NULL;
}
bool RenderChain::init_fvf(Pass &pass)
{
static const D3DVERTEXELEMENT decl_end = D3DDECL_END();
static const D3DVERTEXELEMENT position_decl = DECL_FVF_POSITION(0);
static const D3DVERTEXELEMENT tex_coord0 = DECL_FVF_TEXCOORD(1, 3, 0);
static const D3DVERTEXELEMENT tex_coord1 = DECL_FVF_TEXCOORD(2, 5, 1);
static const D3DVERTEXELEMENT color = DECL_FVF_COLOR(3, 7, 0);
D3DVERTEXELEMENT decl[MAXD3DDECLLENGTH] = {{0}};
if (cgD3D9GetVertexDeclaration(pass.vPrg, decl) == CG_FALSE)
return false;
unsigned count;
for (count = 0; count < MAXD3DDECLLENGTH; count++)
{
if (memcmp(&decl_end, &decl[count], sizeof(decl_end)) == 0)
break;
}
// This is completely insane.
// We do not have a good and easy way of setting up our
// attribute streams, so we have to do it ourselves, yay!
// Stream 0 => POSITION
// Stream 1 => TEXCOORD0
// Stream 2 => TEXCOORD1
// Stream 3 => COLOR // Not really used for anything.
// Stream {4..N} => Texture coord streams for varying resources which have no semantics.
std::vector<bool> indices(count);
bool texcoord0_taken = false;
bool texcoord1_taken = false;
bool stream_taken[4] = {false};
CGparameter param = find_param_from_semantic(pass.vPrg, "POSITION");
if (!param)
param = find_param_from_semantic(pass.vPrg, "POSITION0");
if (param)
{
stream_taken[0] = true;
RARCH_LOG("[FVF]: POSITION semantic found.\n");
unsigned index = cgGetParameterResourceIndex(param);
decl[index] = position_decl;
indices[index] = true;
}
param = find_param_from_semantic(pass.vPrg, "TEXCOORD");
if (!param)
param = find_param_from_semantic(pass.vPrg, "TEXCOORD0");
if (param)
{
stream_taken[1] = true;
texcoord0_taken = true;
RARCH_LOG("[FVF]: TEXCOORD0 semantic found.\n");
unsigned index = cgGetParameterResourceIndex(param);
decl[index] = tex_coord0;
indices[index] = true;
}
param = find_param_from_semantic(pass.vPrg, "TEXCOORD1");
if (param)
{
stream_taken[2] = true;
texcoord1_taken = true;
RARCH_LOG("[FVF]: TEXCOORD1 semantic found.\n");
unsigned index = cgGetParameterResourceIndex(param);
decl[index] = tex_coord1;
indices[index] = true;
}
param = find_param_from_semantic(pass.vPrg, "COLOR");
if (!param)
param = find_param_from_semantic(pass.vPrg, "COLOR0");
if (param)
{
stream_taken[3] = true;
RARCH_LOG("[FVF]: COLOR0 semantic found.\n");
unsigned index = cgGetParameterResourceIndex(param);
decl[index] = color;
indices[index] = true;
}
// Stream {0, 1, 2, 3} might be already taken. Find first vacant stream.
unsigned index;
for (index = 0; index < 4 && stream_taken[index]; index++);
// Find first vacant texcoord declaration.
unsigned tex_index = 0;
if (texcoord0_taken && texcoord1_taken)
tex_index = 2;
else if (texcoord1_taken && !texcoord0_taken)
tex_index = 0;
else if (texcoord0_taken && !texcoord1_taken)
tex_index = 1;
for (unsigned i = 0; i < count; i++)
{
if (indices[i])
pass.attrib_map.push_back(0);
else
{
pass.attrib_map.push_back(index);
D3DVERTEXELEMENT elem = DECL_FVF_TEXCOORD(index, 3, tex_index);
decl[i] = elem;
// Find next vacant stream.
index++;
while (index < 4 && stream_taken[index]) index++;
// Find next vacant texcoord declaration.
tex_index++;
if (tex_index == 1 && texcoord1_taken)
tex_index++;
}
}
if (FAILED(dev->CreateVertexDeclaration(decl, &pass.vertex_decl)))
return false;
return true;
}
static inline CGparameter find_param_from_semantic(CGprogram prog, const std::string &sem)
{
return find_param_from_semantic(cgGetFirstParameter(prog, CG_PROGRAM), sem);
}
static INLINE CGparameter find_param_from_semantic(CGprogram prog,
const char *sem)
{
CGparameter param = cgGetFirstParameter(prog, CG_PROGRAM);
return find_param_from_semantic(param, sem);
}
