source/texture3d.cpp

   1 #include <cmath>
   2 #include <msp/core/raii.h>
   3 #include <msp/gl/extensions/arb_direct_state_access.h>
   4 #include <msp/gl/extensions/arb_texture_storage.h>
   5 #include <msp/gl/extensions/ext_texture3d.h>
   6 #include <msp/gl/extensions/ext_texture_array.h>
   7 #include <msp/graphics/image.h>
   8 #include "bindable.h"
   9 #include "error.h"
  10 #include "pixelstore.h"
  11 #include "texture3d.h"
  12
  13 using namespace std;
  14
  15 namespace Msp {
  16 namespace GL {
  17
  18 Texture3D::Texture3D(GLenum t):
  19         Texture(t),
  20         width(0),
  21         height(0),
  22         depth(0),
  23         allocated(0)
  24 { }
  25
  26 Texture3D::Texture3D():
  27         Texture(GL_TEXTURE_3D),
  28         width(0),
  29         height(0),
  30         depth(0),
  31         allocated(0)
  32 {
  33         static Require _req(EXT_texture3D);
  34 }
  35
  36 void Texture3D::storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned dp)
  37 {
  38         if(width>0)
  39                 throw invalid_operation("Texture3D::storage");
  40         if(wd==0 || ht==0 || dp==0)
  41                 throw invalid_argument("Texture3D::storage");
  42
  43         set_internal_format(fmt);
  44         width = wd;
  45         height = ht;
  46         depth = dp;
  47 }
  48
  49 void Texture3D::allocate(unsigned level)
  50 {
  51         if(width==0 || height==0 || depth==0)
  52                 throw invalid_operation("Texture3D::allocate");
  53         if(allocated&(1<<level))
  54                 return;
  55
  56         if(ARB_texture_storage)
  57         {
  58                 unsigned n_levels = (is_mipmapped(min_filter) ? get_n_levels() : 1);
  59                 if(ARB_direct_state_access)
  60                         glTextureStorage3D(id, n_levels, ifmt, width, height, depth);
  61                 else
  62                 {
  63                         BindRestore _bind(this);
  64                         glTexStorage3D(target, n_levels, ifmt, width, height, depth);
  65                 }
  66                 allocated |= (1<<n_levels)-1;
  67         }
  68         else
  69         {
  70                 PixelFormat base_fmt = get_base_pixelformat(ifmt);
  71                 image(level, base_fmt, get_alloc_type(base_fmt), 0);
  72         }
  73 }
  74
  75 void Texture3D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
  76 {
  77         if(width==0 || height==0 || depth==0)
  78                 throw invalid_operation("Texture3D::image");
  79
  80         unsigned w = width;
  81         unsigned h = height;
  82         unsigned d = depth;
  83         get_level_size(level, w, h, d);
  84
  85         if(ARB_texture_storage)
  86                 return sub_image(level, 0, 0, 0, w, h, d, fmt, type, data);
  87
  88         BindRestore _bind(this);
  89         glTexImage3D(target, level, ifmt, width, height, depth, 0, get_upload_format(fmt), type, data);
  90
  91         allocated |= 1<<level;
  92         if(gen_mipmap && level==0)
  93         {
  94                 auto_generate_mipmap();
  95                 allocated |= (1<<get_n_levels())-1;
  96         }
  97 }
  98
  99 void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, PixelFormat fmt, DataType type, const void *data)
 100 {
 101         if(width==0 || height==0 || depth==0)
 102                 throw invalid_operation("Texture3D::image");
 103
 104         Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
 105         allocate(level);
 106
 107         fmt = get_upload_format(fmt);
 108         if(ARB_direct_state_access)
 109                 glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, fmt, type, data);
 110         else
 111                 glTexSubImage3D(target, level, x, y, z, wd, ht, dp, fmt, type, data);
 112
 113         if(gen_mipmap && level==0)
 114                 auto_generate_mipmap();
 115 }
 116
 117 void Texture3D::load_image(const string &fn, int dp)
 118 {
 119         Graphics::Image img;
 120         img.load_file(fn);
 121
 122         unsigned w = img.get_width();
 123         unsigned h = img.get_height();
 124         unsigned d = 1;
 125
 126         if(dp==-1)
 127         {
 128                 if(h%w)
 129                         throw incompatible_data("Texture3D::load_image");
 130                 d = h/w;
 131                 h = w;
 132         }
 133         else if(dp==-2)
 134         {
 135                 for(d=h; d*d>h; d>>=2) ;
 136                 for(; d*d<h; ++d) ;
 137                 if(d*d!=h)
 138                         throw incompatible_data("Texture3D::load_image");
 139                 h = d;
 140         }
 141         else if(dp>0)
 142         {
 143                 d = dp;
 144                 if(h%d)
 145                         throw incompatible_data("Texture3D::load_image");
 146                 h /= d;
 147         }
 148         else
 149                 throw invalid_argument("Texture3D::load_image");
 150
 151         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
 152         if(width==0)
 153                 storage(storage_pixelformat_from_graphics(img.get_format()), w, h, d);
 154         else if(w!=width || h!=height || d!=depth)
 155                 throw incompatible_data("Texture3D::load_image");
 156
 157         PixelStore pstore = PixelStore::from_image(img);
 158         BindRestore _bind_ps(pstore);
 159
 160         image(0, fmt, UNSIGNED_BYTE, img.get_data());
 161 }
 162
 163 void Texture3D::image(const Graphics::Image &img, bool srgb)
 164 {
 165         unsigned w = img.get_width();
 166         unsigned h = img.get_height();
 167         unsigned d = 1;
 168
 169         if(depth)
 170         {
 171                 if(h%depth)
 172                         throw incompatible_data("Texture3D::load_image");
 173                 h /= depth;
 174                 d = depth;
 175         }
 176         else
 177         {
 178                 if(h%w)
 179                         throw incompatible_data("Texture3D::load_image");
 180                 d = h/w;
 181                 h = w;
 182         }
 183
 184         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
 185         if(width==0)
 186                 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w, h, d);
 187         else if(w!=width || h!=height || d!=depth)
 188                 throw incompatible_data("Texture3D::load_image");
 189
 190         PixelStore pstore = PixelStore::from_image(img);
 191         BindRestore _bind_ps(pstore);
 192
 193         image(0, fmt, UNSIGNED_BYTE, img.get_data());
 194 }
 195
 196 unsigned Texture3D::get_n_levels() const
 197 {
 198         unsigned s = max(width, height);
 199         if(target!=GL_TEXTURE_2D_ARRAY)
 200                 s = max(s, depth);
 201         unsigned n = 0;
 202         for(; s; s>>=1, ++n) ;
 203         return n;
 204 }
 205
 206 void Texture3D::get_level_size(unsigned level, unsigned &w, unsigned &h, unsigned &d) const
 207 {
 208         w >>= level;
 209         h >>= level;
 210         if(target!=GL_TEXTURE_2D_ARRAY)
 211                 d >>= level;
 212
 213         if(!w && (h || d))
 214                 w = 1;
 215         if(!h && (w || d))
 216                 h = 1;
 217         if(!d && (w || h))
 218                 d = 1;
 219 }
 220
 221 UInt64 Texture3D::get_data_size() const
 222 {
 223         return id ? width*height*depth*get_pixel_size(ifmt) : 0;
 224 }
 225
 226
 227 Texture3D::Loader::Loader(Texture3D &t):
 228         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
 229 {
 230         init();
 231 }
 232
 233 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
 234         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
 235 {
 236         init();
 237 }
 238
 239 void Texture3D::Loader::init()
 240 {
 241         add("raw_data", &Loader::raw_data);
 242         add("storage", &Loader::storage);
 243 }
 244
 245 void Texture3D::Loader::raw_data(const string &data)
 246 {
 247         obj.image(0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
 248 }
 249
 250 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
 251 {
 252         if(srgb)
 253                 fmt = get_srgb_pixelformat(fmt);
 254         obj.storage(fmt, w, h, d);
 255 }
 256
 257 } // namespace GL
 258 } // namespace Msp