source/core/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, unsigned lv)
  37 {
  38         if(width>0)
  39         {
  40                 if(fmt!=format || wd!=width || ht!=height || dp!=depth || (lv && lv!=levels))
  41                         throw incompatible_data("Texture3D::storage");
  42                 return;
  43         }
  44         if(wd==0 || ht==0 || dp==0)
  45                 throw invalid_argument("Texture3D::storage");
  46
  47         set_format(fmt);
  48         width = wd;
  49         height = ht;
  50         depth = dp;
  51         levels = get_n_levels();
  52         if(lv>0)
  53                 levels = min(levels, lv);
  54 }
  55
  56 void Texture3D::allocate(unsigned level)
  57 {
  58         if(width==0 || height==0 || depth==0)
  59                 throw invalid_operation("Texture3D::allocate");
  60         if(level>=levels)
  61                 throw invalid_argument("Texture3D::allocate");
  62         if(allocated&(1<<level))
  63                 return;
  64
  65         bool direct = ARB_texture_storage && ARB_direct_state_access;
  66         if(!direct)
  67         {
  68                 glActiveTexture(GL_TEXTURE0);
  69                 glBindTexture(target, id);
  70         }
  71
  72         allocate_(level);
  73
  74         if(!direct)
  75                 glBindTexture(target, 0);
  76 }
  77
  78 void Texture3D::allocate_(unsigned level)
  79 {
  80         if(ARB_texture_storage)
  81         {
  82                 if(ARB_direct_state_access)
  83                         glTextureStorage3D(id, levels, storage_fmt, width, height, depth);
  84                 else
  85                         glTexStorage3D(target, levels, storage_fmt, width, height, depth);
  86                 apply_swizzle();
  87                 allocated |= (1<<levels)-1;
  88         }
  89         else
  90                 image_(level, 0);
  91 }
  92
  93 void Texture3D::image(unsigned level, const void *data)
  94 {
  95         if(width==0 || height==0 || depth==0)
  96                 throw invalid_operation("Texture3D::image");
  97         if(level>=levels)
  98                 throw out_of_range("Texture3D::image");
  99
 100         if(ARB_texture_storage)
 101         {
 102                 LinAl::Vector<unsigned, 3> size = get_level_size(level);
 103                 return sub_image(level, 0, 0, 0, size.x, size.y, size.z, data);
 104         }
 105
 106         glActiveTexture(GL_TEXTURE0);
 107         glBindTexture(target, id);
 108
 109         image_(level, data);
 110
 111         if(auto_gen_mipmap && level==0)
 112         {
 113                 generate_mipmap_();
 114                 allocated |= (1<<levels)-1;
 115         }
 116
 117         glBindTexture(target, 0);
 118 }
 119
 120 void Texture3D::image_(unsigned level, const void *data)
 121 {
 122         if(!allocated)
 123         {
 124                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
 125                 apply_swizzle();
 126         }
 127
 128         LinAl::Vector<unsigned, 3> size = get_level_size(level);
 129         PixelComponents comp = get_components(storage_fmt);
 130         GLenum type = get_gl_type(get_component_type(storage_fmt));
 131         glTexImage3D(target, level, storage_fmt, size.x, size.y, size.z, 0, comp, type, data);
 132
 133         allocated |= 1<<level;
 134 }
 135
 136 void Texture3D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
 137 {
 138         if(comp!=get_components(format) || type!=get_component_type(format))
 139                 throw incompatible_data("Texture3D::image");
 140         image(level, data);
 141 }
 142
 143 void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data)
 144 {
 145         if(width==0 || height==0 || depth==0)
 146                 throw invalid_operation("Texture3D::sub_image");
 147         if(level>=levels)
 148                 throw out_of_range("Texture3D::sub_image");
 149
 150         bool direct = (ARB_direct_state_access && (ARB_texture_storage || (allocated&(1<<level))));
 151         if(!direct)
 152         {
 153                 glActiveTexture(GL_TEXTURE0);
 154                 glBindTexture(target, id);
 155         }
 156
 157         allocate_(level);
 158
 159         PixelComponents comp = get_components(storage_fmt);
 160         GLenum type = get_gl_type(get_component_type(storage_fmt));
 161         if(ARB_direct_state_access)
 162                 glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, comp, type, data);
 163         else
 164                 glTexSubImage3D(target, level, x, y, z, wd, ht, dp, comp, type, data);
 165
 166         if(auto_gen_mipmap && level==0)
 167                 generate_mipmap_();
 168
 169         if(!direct)
 170                 glBindTexture(target, 0);
 171 }
 172
 173 void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, PixelComponents comp, DataType type, const void *data)
 174 {
 175         if(comp!=get_components(format) || type!=get_component_type(format))
 176                 throw incompatible_data("Texture3D::sub_image");
 177         sub_image(level, x, y, z, wd, ht, dp, data);
 178 }
 179
 180 void Texture3D::image(const Graphics::Image &img, unsigned lv)
 181 {
 182         unsigned w = img.get_width();
 183         unsigned h = img.get_height();
 184
 185         if(h%w)
 186                 throw incompatible_data("Texture3D::load_image");
 187         unsigned d = h/w;
 188         h = w;
 189
 190         PixelFormat fmt = pixelformat_from_image(img);
 191         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, h, d, lv);
 192
 193         PixelStore pstore = PixelStore::from_image(img);
 194         BindRestore _bind_ps(pstore);
 195
 196         image(0, img.get_pixels());
 197 }
 198
 199 unsigned Texture3D::get_n_levels() const
 200 {
 201         unsigned s = max(width, height);
 202         if(target!=GL_TEXTURE_2D_ARRAY)
 203                 s = max(s, depth);
 204         unsigned n = 0;
 205         for(; s; s>>=1, ++n) ;
 206         return n;
 207 }
 208
 209 LinAl::Vector<unsigned, 3> Texture3D::get_level_size(unsigned level) const
 210 {
 211         unsigned w = width>>level;
 212         unsigned h = height>>level;
 213         unsigned d = depth;
 214         if(target!=GL_TEXTURE_2D_ARRAY)
 215                 d >>= level;
 216
 217         if(!w && (h || d))
 218                 w = 1;
 219         if(!h && (w || d))
 220                 h = 1;
 221         if(!d && (w || h))
 222                 d = 1;
 223
 224         return LinAl::Vector<unsigned, 3>(w, h, d);
 225 }
 226
 227 UInt64 Texture3D::get_data_size() const
 228 {
 229         return id ? width*height*depth*get_pixel_size(storage_fmt) : 0;
 230 }
 231
 232
 233 Texture3D::Loader::Loader(Texture3D &t):
 234         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
 235 {
 236         init();
 237 }
 238
 239 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
 240         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
 241 {
 242         init();
 243 }
 244
 245 void Texture3D::Loader::init()
 246 {
 247         add("raw_data", &Loader::raw_data);
 248         add("storage", &Loader::storage);
 249         add("storage", &Loader::storage_levels);
 250 }
 251
 252 void Texture3D::Loader::raw_data(const string &data)
 253 {
 254         obj.image(0, data.data());
 255 }
 256
 257 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
 258 {
 259         obj.storage(fmt, w, h, d);
 260 }
 261
 262 void Texture3D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned d, unsigned l)
 263 {
 264         obj.storage(fmt, w, h, d, l);
 265 }
 266
 267 } // namespace GL
 268 } // namespace Msp