source/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                 throw invalid_operation("Texture3D::storage");
  40         if(wd==0 || ht==0 || dp==0)
  41                 throw invalid_argument("Texture3D::storage");
  42
  43         set_format(fmt);
  44         width = wd;
  45         height = ht;
  46         depth = dp;
  47         levels = get_n_levels();
  48         if(lv>0)
  49                 levels = min(levels, lv);
  50 }
  51
  52 void Texture3D::allocate(unsigned level)
  53 {
  54         if(width==0 || height==0 || depth==0)
  55                 throw invalid_operation("Texture3D::allocate");
  56         if(level>=levels)
  57                 throw invalid_argument("Texture3D::allocate");
  58         if(allocated&(1<<level))
  59                 return;
  60
  61         if(ARB_texture_storage)
  62         {
  63                 Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
  64                 if(ARB_direct_state_access)
  65                         glTextureStorage3D(id, levels, storage_fmt, width, height, depth);
  66                 else
  67                         glTexStorage3D(target, levels, storage_fmt, width, height, depth);
  68                 apply_swizzle();
  69                 allocated |= (1<<levels)-1;
  70         }
  71         else
  72                 image(level, 0);
  73 }
  74
  75 void Texture3D::image(unsigned level, const void *data)
  76 {
  77         if(width==0 || height==0 || depth==0)
  78                 throw invalid_operation("Texture3D::image");
  79
  80         unsigned w = width;
  81         unsigned h = height;
  82         unsigned d = depth;
  83         get_level_size(level, w, h, d);
  84
  85         if(ARB_texture_storage)
  86                 return sub_image(level, 0, 0, 0, w, h, d, data);
  87
  88         BindRestore _bind(this);
  89
  90         if(!allocated)
  91         {
  92                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
  93                 apply_swizzle();
  94         }
  95
  96         PixelComponents comp = get_components(storage_fmt);
  97         DataType type = get_component_type(storage_fmt);
  98         glTexImage3D(target, level, storage_fmt, width, height, depth, 0, comp, type, data);
  99
 100         allocated |= 1<<level;
 101         if(auto_gen_mipmap && level==0)
 102         {
 103                 generate_mipmap();
 104                 allocated |= (1<<levels)-1;
 105         }
 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::image");
 119
 120         Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
 121         allocate(level);
 122
 123         PixelComponents comp = get_components(storage_fmt);
 124         DataType type = get_component_type(storage_fmt);
 125         if(ARB_direct_state_access)
 126                 glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, comp, type, data);
 127         else
 128                 glTexSubImage3D(target, level, x, y, z, wd, ht, dp, comp, type, data);
 129
 130         if(auto_gen_mipmap && level==0)
 131                 generate_mipmap();
 132 }
 133
 134 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)
 135 {
 136         if(comp!=get_components(format) || type!=get_component_type(format))
 137                 throw incompatible_data("Texture3D::sub_image");
 138         sub_image(level, x, y, z, wd, ht, dp, data);
 139 }
 140
 141 void Texture3D::image(const Graphics::Image &img, unsigned lv)
 142 {
 143         unsigned w = img.get_width();
 144         unsigned h = img.get_height();
 145
 146         if(h%w)
 147                 throw incompatible_data("Texture3D::load_image");
 148         unsigned d = h/w;
 149         h = w;
 150
 151         PixelFormat fmt = pixelformat_from_image(img);
 152         if(width==0)
 153                 storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, h, d, lv);
 154         else if(w!=width || h!=height || d!=depth)
 155                 throw incompatible_data("Texture3D::load_image");
 156
 157         PixelStore pstore = PixelStore::from_image(img);
 158         BindRestore _bind_ps(pstore);
 159
 160         image(0, img.get_pixels());
 161 }
 162
 163 unsigned Texture3D::get_n_levels() const
 164 {
 165         unsigned s = max(width, height);
 166         if(target!=GL_TEXTURE_2D_ARRAY)
 167                 s = max(s, depth);
 168         unsigned n = 0;
 169         for(; s; s>>=1, ++n) ;
 170         return n;
 171 }
 172
 173 void Texture3D::get_level_size(unsigned level, unsigned &w, unsigned &h, unsigned &d) const
 174 {
 175         w >>= level;
 176         h >>= level;
 177         if(target!=GL_TEXTURE_2D_ARRAY)
 178                 d >>= level;
 179
 180         if(!w && (h || d))
 181                 w = 1;
 182         if(!h && (w || d))
 183                 h = 1;
 184         if(!d && (w || h))
 185                 d = 1;
 186 }
 187
 188 UInt64 Texture3D::get_data_size() const
 189 {
 190         return id ? width*height*depth*get_pixel_size(storage_fmt) : 0;
 191 }
 192
 193
 194 Texture3D::Loader::Loader(Texture3D &t):
 195         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
 196 {
 197         init();
 198 }
 199
 200 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
 201         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
 202 {
 203         init();
 204 }
 205
 206 void Texture3D::Loader::init()
 207 {
 208         add("raw_data", &Loader::raw_data);
 209         add("storage", &Loader::storage);
 210         add("storage", &Loader::storage_levels);
 211 }
 212
 213 void Texture3D::Loader::raw_data(const string &data)
 214 {
 215         obj.image(0, data.data());
 216 }
 217
 218 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
 219 {
 220         obj.storage(fmt, w, h, d);
 221 }
 222
 223 void Texture3D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned d, unsigned l)
 224 {
 225         obj.storage(fmt, w, h, d, l);
 226 }
 227
 228 } // namespace GL
 229 } // namespace Msp