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 "error.h"
   9 #include "texture3d.h"
  10
  11 using namespace std;
  12
  13 namespace Msp {
  14 namespace GL {
  15
  16 Texture3D::Texture3D(GLenum t):
  17         Texture(t),
  18         width(0),
  19         height(0),
  20         depth(0),
  21         allocated(0)
  22 { }
  23
  24 Texture3D::Texture3D():
  25         Texture(GL_TEXTURE_3D),
  26         width(0),
  27         height(0),
  28         depth(0),
  29         allocated(0)
  30 {
  31         static Require _req(EXT_texture3D);
  32 }
  33
  34 void Texture3D::storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned dp, unsigned lv)
  35 {
  36         if(width>0)
  37         {
  38                 if(fmt!=format || wd!=width || ht!=height || dp!=depth || (lv && lv!=levels))
  39                         throw incompatible_data("Texture3D::storage");
  40                 return;
  41         }
  42         if(wd==0 || ht==0 || dp==0)
  43                 throw invalid_argument("Texture3D::storage");
  44
  45         set_format(fmt);
  46         width = wd;
  47         height = ht;
  48         depth = dp;
  49         levels = get_n_levels();
  50         if(lv>0)
  51                 levels = min(levels, lv);
  52 }
  53
  54 void Texture3D::allocate(unsigned level)
  55 {
  56         if(width==0 || height==0 || depth==0)
  57                 throw invalid_operation("Texture3D::allocate");
  58         if(level>=levels)
  59                 throw invalid_argument("Texture3D::allocate");
  60         if(allocated&(1<<level))
  61                 return;
  62
  63         bool direct = ARB_texture_storage && ARB_direct_state_access;
  64         if(!direct)
  65         {
  66                 glActiveTexture(GL_TEXTURE0);
  67                 glBindTexture(target, id);
  68         }
  69
  70         allocate_(level);
  71
  72         if(!direct)
  73                 glBindTexture(target, 0);
  74 }
  75
  76 void Texture3D::allocate_(unsigned level)
  77 {
  78         if(ARB_texture_storage)
  79         {
  80                 if(ARB_direct_state_access)
  81                         glTextureStorage3D(id, levels, storage_fmt, width, height, depth);
  82                 else
  83                         glTexStorage3D(target, levels, storage_fmt, width, height, depth);
  84                 apply_swizzle();
  85                 allocated |= (1<<levels)-1;
  86         }
  87         else
  88                 image_(level, 0);
  89 }
  90
  91 void Texture3D::image(unsigned level, const void *data)
  92 {
  93         if(width==0 || height==0 || depth==0)
  94                 throw invalid_operation("Texture3D::image");
  95         if(level>=levels)
  96                 throw out_of_range("Texture3D::image");
  97
  98         if(ARB_texture_storage)
  99         {
 100                 LinAl::Vector<unsigned, 3> size = get_level_size(level);
 101                 return sub_image(level, 0, 0, 0, size.x, size.y, size.z, data);
 102         }
 103
 104         glActiveTexture(GL_TEXTURE0);
 105         glBindTexture(target, id);
 106
 107         image_(level, data);
 108
 109         if(auto_gen_mipmap && level==0)
 110         {
 111                 generate_mipmap_();
 112                 allocated |= (1<<levels)-1;
 113         }
 114
 115         glBindTexture(target, 0);
 116 }
 117
 118 void Texture3D::image_(unsigned level, const void *data)
 119 {
 120         if(!allocated)
 121         {
 122                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
 123                 apply_swizzle();
 124         }
 125
 126         LinAl::Vector<unsigned, 3> size = get_level_size(level);
 127         PixelComponents comp = get_components(storage_fmt);
 128         GLenum type = get_gl_type(get_component_type(storage_fmt));
 129         glTexImage3D(target, level, storage_fmt, size.x, size.y, size.z, 0, comp, type, data);
 130
 131         allocated |= 1<<level;
 132 }
 133
 134 void Texture3D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
 135 {
 136         if(comp!=get_components(format) || type!=get_component_type(format))
 137                 throw incompatible_data("Texture3D::image");
 138         image(level, data);
 139 }
 140
 141 void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data)
 142 {
 143         if(width==0 || height==0 || depth==0)
 144                 throw invalid_operation("Texture3D::sub_image");
 145         if(level>=levels)
 146                 throw out_of_range("Texture3D::sub_image");
 147
 148         bool direct = (ARB_direct_state_access && (ARB_texture_storage || (allocated&(1<<level))));
 149         if(!direct)
 150         {
 151                 glActiveTexture(GL_TEXTURE0);
 152                 glBindTexture(target, id);
 153         }
 154
 155         allocate_(level);
 156
 157         PixelComponents comp = get_components(storage_fmt);
 158         GLenum type = get_gl_type(get_component_type(storage_fmt));
 159         if(ARB_direct_state_access)
 160                 glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, comp, type, data);
 161         else
 162                 glTexSubImage3D(target, level, x, y, z, wd, ht, dp, comp, type, data);
 163
 164         if(auto_gen_mipmap && level==0)
 165                 generate_mipmap_();
 166
 167         if(!direct)
 168                 glBindTexture(target, 0);
 169 }
 170
 171 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)
 172 {
 173         if(comp!=get_components(format) || type!=get_component_type(format))
 174                 throw incompatible_data("Texture3D::sub_image");
 175         sub_image(level, x, y, z, wd, ht, dp, data);
 176 }
 177
 178 void Texture3D::image(const Graphics::Image &img, unsigned lv)
 179 {
 180         unsigned w = img.get_width();
 181         unsigned h = img.get_height();
 182
 183         if(h%w)
 184                 throw incompatible_data("Texture3D::load_image");
 185         unsigned d = h/w;
 186         h = w;
 187
 188         PixelFormat fmt = pixelformat_from_image(img);
 189         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, h, d, lv);
 190
 191         image(0, img.get_pixels());
 192 }
 193
 194 unsigned Texture3D::get_n_levels() const
 195 {
 196         unsigned s = max(width, height);
 197         if(target!=GL_TEXTURE_2D_ARRAY)
 198                 s = max(s, depth);
 199         unsigned n = 0;
 200         for(; s; s>>=1, ++n) ;
 201         return n;
 202 }
 203
 204 LinAl::Vector<unsigned, 3> Texture3D::get_level_size(unsigned level) const
 205 {
 206         unsigned w = width>>level;
 207         unsigned h = height>>level;
 208         unsigned d = depth;
 209         if(target!=GL_TEXTURE_2D_ARRAY)
 210                 d >>= level;
 211
 212         if(!w && (h || d))
 213                 w = 1;
 214         if(!h && (w || d))
 215                 h = 1;
 216         if(!d && (w || h))
 217                 d = 1;
 218
 219         return LinAl::Vector<unsigned, 3>(w, h, d);
 220 }
 221
 222 UInt64 Texture3D::get_data_size() const
 223 {
 224         return id ? width*height*depth*get_pixel_size(storage_fmt) : 0;
 225 }
 226
 227
 228 Texture3D::Loader::Loader(Texture3D &t):
 229         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
 230 {
 231         init();
 232 }
 233
 234 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
 235         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
 236 {
 237         init();
 238 }
 239
 240 void Texture3D::Loader::init()
 241 {
 242         add("raw_data", &Loader::raw_data);
 243         add("storage", &Loader::storage);
 244         add("storage", &Loader::storage_levels);
 245 }
 246
 247 void Texture3D::Loader::raw_data(const string &data)
 248 {
 249         obj.image(0, data.data());
 250 }
 251
 252 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
 253 {
 254         obj.storage(fmt, w, h, d);
 255 }
 256
 257 void Texture3D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned d, unsigned l)
 258 {
 259         obj.storage(fmt, w, h, d, l);
 260 }
 261
 262 } // namespace GL
 263 } // namespace Msp