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