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                 GLenum fmt = get_gl_pixelformat(storage_fmt);
  81                 if(ARB_direct_state_access)
  82                         glTextureStorage3D(id, levels, fmt, width, height, depth);
  83                 else
  84                         glTexStorage3D(target, levels, 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         GLenum fmt = get_gl_pixelformat(storage_fmt);
 129         GLenum comp = get_gl_components(get_components(storage_fmt));
 130         GLenum type = get_gl_type(get_component_type(storage_fmt));
 131         glTexImage3D(target, level, 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         GLenum comp = get_gl_components(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         image(0, img.get_pixels());
 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 LinAl::Vector<unsigned, 3> Texture3D::get_level_size(unsigned level) const
 207 {
 208         unsigned w = width>>level;
 209         unsigned h = height>>level;
 210         unsigned d = depth;
 211         if(target!=GL_TEXTURE_2D_ARRAY)
 212                 d >>= level;
 213
 214         if(!w && (h || d))
 215                 w = 1;
 216         if(!h && (w || d))
 217                 h = 1;
 218         if(!d && (w || h))
 219                 d = 1;
 220
 221         return LinAl::Vector<unsigned, 3>(w, h, d);
 222 }
 223
 224 UInt64 Texture3D::get_data_size() const
 225 {
 226         return id ? width*height*depth*get_pixel_size(storage_fmt) : 0;
 227 }
 228
 229
 230 Texture3D::Loader::Loader(Texture3D &t):
 231         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
 232 {
 233         init();
 234 }
 235
 236 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
 237         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
 238 {
 239         init();
 240 }
 241
 242 void Texture3D::Loader::init()
 243 {
 244         add("raw_data", &Loader::raw_data);
 245         add("storage", &Loader::storage);
 246         add("storage", &Loader::storage_levels);
 247 }
 248
 249 void Texture3D::Loader::raw_data(const string &data)
 250 {
 251         obj.image(0, data.data());
 252 }
 253
 254 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
 255 {
 256         obj.storage(fmt, w, h, d);
 257 }
 258
 259 void Texture3D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned d, unsigned l)
 260 {
 261         obj.storage(fmt, w, h, d, l);
 262 }
 263
 264 } // namespace GL
 265 } // namespace Msp