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
  61         bool direct = ARB_texture_storage && ARB_direct_state_access;
  62         if(!direct)
  63         {
  64                 glActiveTexture(GL_TEXTURE0);
  65                 glBindTexture(target, id);
  66         }
  67
  68         allocate_(level);
  69
  70         if(!direct)
  71                 glBindTexture(target, 0);
  72 }
  73
  74 void Texture3D::allocate_(unsigned level)
  75 {
  76         if(allocated&(1<<level))
  77                 return;
  78
  79         if(ARB_texture_storage)
  80         {
  81                 GLenum fmt = get_gl_pixelformat(storage_fmt);
  82                 if(ARB_direct_state_access)
  83                         glTextureStorage3D(id, levels, fmt, width, height, depth);
  84                 else
  85                         glTexStorage3D(target, levels, 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         GLenum fmt = get_gl_pixelformat(storage_fmt);
 130         GLenum comp = get_gl_components(get_components(storage_fmt));
 131         GLenum type = get_gl_type(get_component_type(storage_fmt));
 132         glTexImage3D(target, level, fmt, size.x, size.y, size.z, 0, comp, type, data);
 133
 134         allocated |= 1<<level;
 135 }
 136
 137 void Texture3D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
 138 {
 139         if(comp!=get_components(format) || type!=get_component_type(format))
 140                 throw incompatible_data("Texture3D::image");
 141         image(level, data);
 142 }
 143
 144 void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data)
 145 {
 146         if(width==0 || height==0 || depth==0)
 147                 throw invalid_operation("Texture3D::sub_image");
 148         if(level>=levels)
 149                 throw out_of_range("Texture3D::sub_image");
 150
 151         bool direct = (ARB_direct_state_access && (ARB_texture_storage || (allocated&(1<<level))));
 152         if(!direct)
 153         {
 154                 glActiveTexture(GL_TEXTURE0);
 155                 glBindTexture(target, id);
 156         }
 157
 158         allocate_(level);
 159
 160         GLenum comp = get_gl_components(get_components(storage_fmt));
 161         GLenum type = get_gl_type(get_component_type(storage_fmt));
 162         if(ARB_direct_state_access)
 163                 glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, comp, type, data);
 164         else
 165                 glTexSubImage3D(target, level, x, y, z, wd, ht, dp, comp, type, data);
 166
 167         if(auto_gen_mipmap && level==0)
 168                 generate_mipmap_();
 169
 170         if(!direct)
 171                 glBindTexture(target, 0);
 172 }
 173
 174 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)
 175 {
 176         if(comp!=get_components(format) || type!=get_component_type(format))
 177                 throw incompatible_data("Texture3D::sub_image");
 178         sub_image(level, x, y, z, wd, ht, dp, data);
 179 }
 180
 181 void Texture3D::image(const Graphics::Image &img, unsigned lv)
 182 {
 183         unsigned w = img.get_width();
 184         unsigned h = img.get_height();
 185
 186         if(h%w)
 187                 throw incompatible_data("Texture3D::load_image");
 188         unsigned d = h/w;
 189         h = w;
 190
 191         PixelFormat fmt = pixelformat_from_image(img);
 192         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, h, d, lv);
 193
 194         image(0, img.get_pixels());
 195 }
 196
 197 unsigned Texture3D::get_n_levels() const
 198 {
 199         unsigned s = max(width, height);
 200         if(target!=GL_TEXTURE_2D_ARRAY)
 201                 s = max(s, depth);
 202         unsigned n = 0;
 203         for(; s; s>>=1, ++n) ;
 204         return n;
 205 }
 206
 207 LinAl::Vector<unsigned, 3> Texture3D::get_level_size(unsigned level) const
 208 {
 209         unsigned w = width>>level;
 210         unsigned h = height>>level;
 211         unsigned d = depth;
 212         if(target!=GL_TEXTURE_2D_ARRAY)
 213                 d >>= level;
 214
 215         if(!w && (h || d))
 216                 w = 1;
 217         if(!h && (w || d))
 218                 h = 1;
 219         if(!d && (w || h))
 220                 d = 1;
 221
 222         return LinAl::Vector<unsigned, 3>(w, h, d);
 223 }
 224
 225 UInt64 Texture3D::get_data_size() const
 226 {
 227         return id ? width*height*depth*get_pixel_size(storage_fmt) : 0;
 228 }
 229
 230
 231 Texture3D::Loader::Loader(Texture3D &t):
 232         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
 233 {
 234         init();
 235 }
 236
 237 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
 238         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
 239 {
 240         init();
 241 }
 242
 243 void Texture3D::Loader::init()
 244 {
 245         add("raw_data", &Loader::raw_data);
 246         add("storage", &Loader::storage);
 247         add("storage", &Loader::storage_levels);
 248 }
 249
 250 void Texture3D::Loader::raw_data(const string &data)
 251 {
 252         obj.image(0, data.data());
 253 }
 254
 255 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
 256 {
 257         obj.storage(fmt, w, h, d);
 258 }
 259
 260 void Texture3D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned d, unsigned l)
 261 {
 262         obj.storage(fmt, w, h, d, l);
 263 }
 264
 265 } // namespace GL
 266 } // namespace Msp