source/core/texture3d.cpp

   1 #include <cmath>
   2 #include <msp/gl/extensions/arb_direct_state_access.h>
   3 #include <msp/gl/extensions/arb_texture_storage.h>
   4 #include <msp/gl/extensions/ext_texture3d.h>
   5 #include <msp/gl/extensions/ext_texture_array.h>
   6 #include <msp/graphics/image.h>
   7 #include "error.h"
   8 #include "texture3d.h"
   9
  10 using namespace std;
  11
  12 namespace Msp {
  13 namespace GL {
  14
  15 Texture3D::Texture3D(GLenum t):
  16         Texture(t),
  17         width(0),
  18         height(0),
  19         depth(0),
  20         allocated(0)
  21 { }
  22
  23 Texture3D::Texture3D():
  24         Texture(GL_TEXTURE_3D),
  25         width(0),
  26         height(0),
  27         depth(0),
  28         allocated(0)
  29 {
  30         static Require _req(EXT_texture3D);
  31 }
  32
  33 void Texture3D::storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned dp, unsigned lv)
  34 {
  35         if(width>0)
  36         {
  37                 if(fmt!=format || wd!=width || ht!=height || dp!=depth || (lv && lv!=levels))
  38                         throw incompatible_data("Texture3D::storage");
  39                 return;
  40         }
  41         if(wd==0 || ht==0 || dp==0)
  42                 throw invalid_argument("Texture3D::storage");
  43
  44         set_format(fmt);
  45         width = wd;
  46         height = ht;
  47         depth = dp;
  48         levels = get_n_levels();
  49         if(lv>0)
  50                 levels = min(levels, lv);
  51 }
  52
  53 void Texture3D::allocate(unsigned level)
  54 {
  55         if(width==0 || height==0 || depth==0)
  56                 throw invalid_operation("Texture3D::allocate");
  57         if(level>=levels)
  58                 throw invalid_argument("Texture3D::allocate");
  59         if(allocated&(1<<level))
  60                 return;
  61
  62         if(ARB_texture_storage)
  63         {
  64                 GLenum fmt = get_gl_pixelformat(storage_fmt);
  65                 if(ARB_direct_state_access)
  66                         glTextureStorage3D(id, levels, fmt, width, height, depth);
  67                 else
  68                 {
  69                         bind_scratch();
  70                         glTexStorage3D(target, levels, fmt, width, height, depth);
  71                 }
  72                 apply_swizzle();
  73                 allocated |= (1<<levels)-1;
  74         }
  75         else
  76                 image(level, 0);
  77 }
  78
  79 void Texture3D::image(unsigned level, const void *data)
  80 {
  81         if(width==0 || height==0 || depth==0)
  82                 throw invalid_operation("Texture3D::image");
  83         if(level>=levels)
  84                 throw out_of_range("Texture3D::image");
  85
  86         LinAl::Vector<unsigned, 3> size = get_level_size(level);
  87
  88         if(ARB_texture_storage)
  89                 return sub_image(level, 0, 0, 0, size.x, size.y, size.z, data);
  90
  91         bind_scratch();
  92
  93         if(!allocated)
  94         {
  95                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
  96                 apply_swizzle();
  97         }
  98
  99         GLenum fmt = get_gl_pixelformat(storage_fmt);
 100         GLenum comp = get_gl_components(get_components(storage_fmt));
 101         GLenum type = get_gl_type(get_component_type(storage_fmt));
 102         glTexImage3D(target, level, fmt, size.x, size.y, size.z, 0, comp, type, data);
 103
 104         allocated |= 1<<level;
 105 }
 106
 107 void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data)
 108 {
 109         if(width==0 || height==0 || depth==0)
 110                 throw invalid_operation("Texture3D::sub_image");
 111         if(level>=levels)
 112                 throw out_of_range("Texture3D::sub_image");
 113
 114         allocate(level);
 115
 116         GLenum comp = get_gl_components(get_components(storage_fmt));
 117         GLenum type = get_gl_type(get_component_type(storage_fmt));
 118         if(ARB_direct_state_access)
 119                 glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, comp, type, data);
 120         else
 121         {
 122                 bind_scratch();
 123                 glTexSubImage3D(target, level, x, y, z, wd, ht, dp, comp, type, data);
 124         }
 125 }
 126
 127 void Texture3D::image(const Graphics::Image &img, unsigned lv)
 128 {
 129         unsigned w = img.get_width();
 130         unsigned h = img.get_height();
 131
 132         if(h%w)
 133                 throw incompatible_data("Texture3D::load_image");
 134         unsigned d = h/w;
 135         h = w;
 136
 137         PixelFormat fmt = pixelformat_from_image(img);
 138         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, h, d, lv);
 139
 140         image(0, img.get_pixels());
 141 }
 142
 143 unsigned Texture3D::get_n_levels() const
 144 {
 145         unsigned s = max(width, height);
 146         if(target!=GL_TEXTURE_2D_ARRAY)
 147                 s = max(s, depth);
 148         unsigned n = 0;
 149         for(; s; s>>=1, ++n) ;
 150         return n;
 151 }
 152
 153 LinAl::Vector<unsigned, 3> Texture3D::get_level_size(unsigned level) const
 154 {
 155         unsigned w = width>>level;
 156         unsigned h = height>>level;
 157         unsigned d = depth;
 158         if(target!=GL_TEXTURE_2D_ARRAY)
 159                 d >>= level;
 160
 161         if(!w && (h || d))
 162                 w = 1;
 163         if(!h && (w || d))
 164                 h = 1;
 165         if(!d && (w || h))
 166                 d = 1;
 167
 168         return LinAl::Vector<unsigned, 3>(w, h, d);
 169 }
 170
 171 uint64_t Texture3D::get_data_size() const
 172 {
 173         return id ? width*height*depth*get_pixel_size(storage_fmt) : 0;
 174 }
 175
 176
 177 Texture3D::Loader::Loader(Texture3D &t):
 178         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
 179 {
 180         init();
 181 }
 182
 183 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
 184         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
 185 {
 186         init();
 187 }
 188
 189 void Texture3D::Loader::init()
 190 {
 191         add("raw_data", &Loader::raw_data);
 192         add("storage", &Loader::storage);
 193         add("storage", &Loader::storage_levels);
 194 }
 195
 196 void Texture3D::Loader::raw_data(const string &data)
 197 {
 198         obj.image(0, data.data());
 199 }
 200
 201 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
 202 {
 203         obj.storage(fmt, w, h, d);
 204 }
 205
 206 void Texture3D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned d, unsigned l)
 207 {
 208         obj.storage(fmt, w, h, d, l);
 209 }
 210
 211 } // namespace GL
 212 } // namespace Msp