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 "pixelstore.h"
  11 #include "texture3d.h"
  12
  13 using namespace std;
  14
  15 namespace Msp {
  16 namespace GL {
  17
  18 Texture3D::Texture3D(GLenum t):
  19         Texture(t),
  20         width(0),
  21         height(0),
  22         depth(0),
  23         allocated(0)
  24 { }
  25
  26 Texture3D::Texture3D():
  27         Texture(GL_TEXTURE_3D),
  28         width(0),
  29         height(0),
  30         depth(0),
  31         allocated(0)
  32 {
  33         static Require _req(EXT_texture3D);
  34 }
  35
  36 void Texture3D::storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned dp, unsigned lv)
  37 {
  38         if(width>0)
  39         {
  40                 if(fmt!=format || wd!=width || ht!=height || dp!=depth || (lv && lv!=levels))
  41                         throw incompatible_data("Texture3D::storage");
  42                 return;
  43         }
  44         if(wd==0 || ht==0 || dp==0)
  45                 throw invalid_argument("Texture3D::storage");
  46
  47         set_format(fmt);
  48         width = wd;
  49         height = ht;
  50         depth = dp;
  51         levels = get_n_levels();
  52         if(lv>0)
  53                 levels = min(levels, lv);
  54 }
  55
  56 void Texture3D::allocate(unsigned level)
  57 {
  58         if(width==0 || height==0 || depth==0)
  59                 throw invalid_operation("Texture3D::allocate");
  60         if(level>=levels)
  61                 throw invalid_argument("Texture3D::allocate");
  62         if(allocated&(1<<level))
  63                 return;
  64
  65         if(ARB_texture_storage)
  66         {
  67                 Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
  68                 if(ARB_direct_state_access)
  69                         glTextureStorage3D(id, levels, storage_fmt, width, height, depth);
  70                 else
  71                         glTexStorage3D(target, levels, storage_fmt, width, height, depth);
  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         BindRestore _bind(this);
  92
  93         if(!allocated)
  94         {
  95                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
  96                 apply_swizzle();
  97         }
  98
  99         PixelComponents comp = get_components(storage_fmt);
 100         GLenum type = get_gl_type(get_component_type(storage_fmt));
 101         glTexImage3D(target, level, storage_fmt, size.x, size.y, size.z, 0, comp, type, data);
 102
 103         allocated |= 1<<level;
 104         if(auto_gen_mipmap && level==0)
 105         {
 106                 generate_mipmap();
 107                 allocated |= (1<<levels)-1;
 108         }
 109 }
 110
 111 void Texture3D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
 112 {
 113         if(comp!=get_components(format) || type!=get_component_type(format))
 114                 throw incompatible_data("Texture3D::image");
 115         image(level, data);
 116 }
 117
 118 void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data)
 119 {
 120         if(width==0 || height==0 || depth==0)
 121                 throw invalid_operation("Texture3D::sub_image");
 122         if(level>=levels)
 123                 throw out_of_range("Texture3D::sub_image");
 124
 125         Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
 126         allocate(level);
 127
 128         PixelComponents comp = get_components(storage_fmt);
 129         GLenum type = get_gl_type(get_component_type(storage_fmt));
 130         if(ARB_direct_state_access)
 131                 glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, comp, type, data);
 132         else
 133                 glTexSubImage3D(target, level, x, y, z, wd, ht, dp, comp, type, data);
 134
 135         if(auto_gen_mipmap && level==0)
 136                 generate_mipmap();
 137 }
 138
 139 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)
 140 {
 141         if(comp!=get_components(format) || type!=get_component_type(format))
 142                 throw incompatible_data("Texture3D::sub_image");
 143         sub_image(level, x, y, z, wd, ht, dp, data);
 144 }
 145
 146 void Texture3D::image(const Graphics::Image &img, unsigned lv)
 147 {
 148         unsigned w = img.get_width();
 149         unsigned h = img.get_height();
 150
 151         if(h%w)
 152                 throw incompatible_data("Texture3D::load_image");
 153         unsigned d = h/w;
 154         h = w;
 155
 156         PixelFormat fmt = pixelformat_from_image(img);
 157         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, h, d, lv);
 158
 159         PixelStore pstore = PixelStore::from_image(img);
 160         BindRestore _bind_ps(pstore);
 161
 162         image(0, img.get_pixels());
 163 }
 164
 165 unsigned Texture3D::get_n_levels() const
 166 {
 167         unsigned s = max(width, height);
 168         if(target!=GL_TEXTURE_2D_ARRAY)
 169                 s = max(s, depth);
 170         unsigned n = 0;
 171         for(; s; s>>=1, ++n) ;
 172         return n;
 173 }
 174
 175 LinAl::Vector<unsigned, 3> Texture3D::get_level_size(unsigned level) const
 176 {
 177         unsigned w = width>>level;
 178         unsigned h = height>>level;
 179         unsigned d = depth;
 180         if(target!=GL_TEXTURE_2D_ARRAY)
 181                 d >>= level;
 182
 183         if(!w && (h || d))
 184                 w = 1;
 185         if(!h && (w || d))
 186                 h = 1;
 187         if(!d && (w || h))
 188                 d = 1;
 189
 190         return LinAl::Vector<unsigned, 3>(w, h, d);
 191 }
 192
 193 UInt64 Texture3D::get_data_size() const
 194 {
 195         return id ? width*height*depth*get_pixel_size(storage_fmt) : 0;
 196 }
 197
 198
 199 Texture3D::Loader::Loader(Texture3D &t):
 200         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
 201 {
 202         init();
 203 }
 204
 205 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
 206         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
 207 {
 208         init();
 209 }
 210
 211 void Texture3D::Loader::init()
 212 {
 213         add("raw_data", &Loader::raw_data);
 214         add("storage", &Loader::storage);
 215         add("storage", &Loader::storage_levels);
 216 }
 217
 218 void Texture3D::Loader::raw_data(const string &data)
 219 {
 220         obj.image(0, data.data());
 221 }
 222
 223 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
 224 {
 225         obj.storage(fmt, w, h, d);
 226 }
 227
 228 void Texture3D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned d, unsigned l)
 229 {
 230         obj.storage(fmt, w, h, d, l);
 231 }
 232
 233 } // namespace GL
 234 } // namespace Msp