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         if(ARB_texture_storage)
  64         {
  65                 GLenum fmt = get_gl_pixelformat(storage_fmt);
  66                 if(ARB_direct_state_access)
  67                         glTextureStorage3D(id, levels, fmt, width, height, depth);
  68                 else
  69                 {
  70                         bind_scratch();
  71                         glTexStorage3D(target, levels, fmt, width, height, depth);
  72                 }
  73                 apply_swizzle();
  74                 allocated |= (1<<levels)-1;
  75         }
  76         else
  77                 image(level, 0);
  78 }
  79
  80 void Texture3D::image(unsigned level, const void *data)
  81 {
  82         if(width==0 || height==0 || depth==0)
  83                 throw invalid_operation("Texture3D::image");
  84         if(level>=levels)
  85                 throw out_of_range("Texture3D::image");
  86
  87         LinAl::Vector<unsigned, 3> size = get_level_size(level);
  88
  89         if(ARB_texture_storage)
  90                 return sub_image(level, 0, 0, 0, size.x, size.y, size.z, data);
  91
  92         bind_scratch();
  93
  94         if(!allocated)
  95         {
  96                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
  97                 apply_swizzle();
  98         }
  99
 100         GLenum fmt = get_gl_pixelformat(storage_fmt);
 101         GLenum comp = get_gl_components(get_components(storage_fmt));
 102         GLenum type = get_gl_type(get_component_type(storage_fmt));
 103         glTexImage3D(target, level, fmt, size.x, size.y, size.z, 0, comp, type, data);
 104
 105         allocated |= 1<<level;
 106 }
 107
 108 void Texture3D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
 109 {
 110         if(comp!=get_components(format) || type!=get_component_type(format))
 111                 throw incompatible_data("Texture3D::image");
 112         image(level, data);
 113 }
 114
 115 void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data)
 116 {
 117         if(width==0 || height==0 || depth==0)
 118                 throw invalid_operation("Texture3D::sub_image");
 119         if(level>=levels)
 120                 throw out_of_range("Texture3D::sub_image");
 121
 122         allocate(level);
 123
 124         GLenum comp = get_gl_components(get_components(storage_fmt));
 125         GLenum type = get_gl_type(get_component_type(storage_fmt));
 126         if(ARB_direct_state_access)
 127                 glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, comp, type, data);
 128         else
 129         {
 130                 bind_scratch();
 131                 glTexSubImage3D(target, level, x, y, z, wd, ht, dp, comp, type, data);
 132         }
 133 }
 134
 135 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)
 136 {
 137         if(comp!=get_components(format) || type!=get_component_type(format))
 138                 throw incompatible_data("Texture3D::sub_image");
 139         sub_image(level, x, y, z, wd, ht, dp, data);
 140 }
 141
 142 void Texture3D::image(const Graphics::Image &img, unsigned lv)
 143 {
 144         unsigned w = img.get_width();
 145         unsigned h = img.get_height();
 146
 147         if(h%w)
 148                 throw incompatible_data("Texture3D::load_image");
 149         unsigned d = h/w;
 150         h = w;
 151
 152         PixelFormat fmt = pixelformat_from_image(img);
 153         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, h, d, lv);
 154
 155         image(0, img.get_pixels());
 156 }
 157
 158 unsigned Texture3D::get_n_levels() const
 159 {
 160         unsigned s = max(width, height);
 161         if(target!=GL_TEXTURE_2D_ARRAY)
 162                 s = max(s, depth);
 163         unsigned n = 0;
 164         for(; s; s>>=1, ++n) ;
 165         return n;
 166 }
 167
 168 LinAl::Vector<unsigned, 3> Texture3D::get_level_size(unsigned level) const
 169 {
 170         unsigned w = width>>level;
 171         unsigned h = height>>level;
 172         unsigned d = depth;
 173         if(target!=GL_TEXTURE_2D_ARRAY)
 174                 d >>= level;
 175
 176         if(!w && (h || d))
 177                 w = 1;
 178         if(!h && (w || d))
 179                 h = 1;
 180         if(!d && (w || h))
 181                 d = 1;
 182
 183         return LinAl::Vector<unsigned, 3>(w, h, d);
 184 }
 185
 186 UInt64 Texture3D::get_data_size() const
 187 {
 188         return id ? width*height*depth*get_pixel_size(storage_fmt) : 0;
 189 }
 190
 191
 192 Texture3D::Loader::Loader(Texture3D &t):
 193         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
 194 {
 195         init();
 196 }
 197
 198 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
 199         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
 200 {
 201         init();
 202 }
 203
 204 void Texture3D::Loader::init()
 205 {
 206         add("raw_data", &Loader::raw_data);
 207         add("storage", &Loader::storage);
 208         add("storage", &Loader::storage_levels);
 209 }
 210
 211 void Texture3D::Loader::raw_data(const string &data)
 212 {
 213         obj.image(0, data.data());
 214 }
 215
 216 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
 217 {
 218         obj.storage(fmt, w, h, d);
 219 }
 220
 221 void Texture3D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned d, unsigned l)
 222 {
 223         obj.storage(fmt, w, h, d, l);
 224 }
 225
 226 } // namespace GL
 227 } // namespace Msp