int GetNumMips(const GLHookSet &gl, GLenum target, GLuint tex, GLuint w, GLuint h, GLuint d)
{
int mips = 1;
GLint immut = 0;
gl.glGetTextureParameterivEXT(tex, target, eGL_TEXTURE_IMMUTABLE_FORMAT, &immut);
if(immut)
gl.glGetTextureParameterivEXT(tex, target, eGL_TEXTURE_IMMUTABLE_LEVELS, (GLint *)&mips);
else
mips = CalcNumMips(w, h, d);
GLint maxLevel = 1000;
gl.glGetTextureParameterivEXT(tex, target, eGL_TEXTURE_MAX_LEVEL, &maxLevel);
mips = RDCMIN(mips, maxLevel+1);
if(immut == 0)
{
// check to see if all mips are set, or clip the number of mips to those that are
// set.
if(target == eGL_TEXTURE_CUBE_MAP)
target = eGL_TEXTURE_CUBE_MAP_POSITIVE_X;
for(int i=0; i < mips; i++)
{
GLint width = 0;
gl.glGetTextureLevelParameterivEXT(tex, target, i, eGL_TEXTURE_WIDTH, &width);
if(width == 0)
{
mips = i;
break;
}
}
}
return RDCMAX(1, mips);
}
UINT GetMipForSubresource(ID3D11Resource *res, int Subresource)
{
D3D11_RESOURCE_DIMENSION dim;
// check for wrapped types first as they will be most common and don't
// require a virtual call
if(WrappedID3D11Texture1D::IsAlloc(res))
dim = D3D11_RESOURCE_DIMENSION_TEXTURE1D;
else if(WrappedID3D11Texture2D::IsAlloc(res))
dim = D3D11_RESOURCE_DIMENSION_TEXTURE2D;
else if(WrappedID3D11Texture3D::IsAlloc(res))
dim = D3D11_RESOURCE_DIMENSION_TEXTURE3D;
else
res->GetType(&dim);
ID3D11Texture1D *tex1 = (dim == D3D11_RESOURCE_DIMENSION_TEXTURE1D) ? (ID3D11Texture1D *)res : NULL;
ID3D11Texture2D *tex2 = (dim == D3D11_RESOURCE_DIMENSION_TEXTURE2D) ? (ID3D11Texture2D *)res : NULL;
ID3D11Texture3D *tex3 = (dim == D3D11_RESOURCE_DIMENSION_TEXTURE3D) ? (ID3D11Texture3D *)res : NULL;
RDCASSERT(tex1 || tex2 || tex3);
UINT mipLevel = Subresource;
if(tex1)
{
D3D11_TEXTURE1D_DESC desc;
tex1->GetDesc(&desc);
int mipLevels = desc.MipLevels;
if(mipLevels == 0)
mipLevels = CalcNumMips(desc.Width, 1, 1);
mipLevel %= mipLevels;
}
else if(tex2)
{
D3D11_TEXTURE2D_DESC desc;
tex2->GetDesc(&desc);
int mipLevels = desc.MipLevels;
if(mipLevels == 0)
mipLevels = CalcNumMips(desc.Width, desc.Height, 1);
mipLevel %= mipLevels;
}
else if(tex3)
{
D3D11_TEXTURE3D_DESC desc;
tex3->GetDesc(&desc);
int mipLevels = desc.MipLevels;
if(mipLevels == 0)
mipLevels = CalcNumMips(desc.Width, desc.Height, desc.Depth);
mipLevel %= mipLevels;
}
return mipLevel;
}
