source/core/texture1d.cpp

   1 #include <msp/core/raii.h>
   2 #include <msp/gl/extensions/arb_direct_state_access.h>
   3 #include <msp/gl/extensions/arb_texture_storage.h>
   4 #include <msp/gl/extensions/msp_texture1d.h>
   5 #include "error.h"
   6 #include "texture1d.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace GL {
  12
  13 Texture1D::Texture1D():
  14         Texture(GL_TEXTURE_1D),
  15         width(0),
  16         allocated(0)
  17 {
  18         static Require _req(MSP_texture1D);
  19 }
  20
  21 void Texture1D::storage(PixelFormat fmt, unsigned wd, unsigned lv)
  22 {
  23         if(width>0)
  24         {
  25                 if(fmt!=format || wd!=width || (lv && lv!=levels))
  26                         throw incompatible_data("Texture1D::storage");
  27                 return;
  28         }
  29         if(wd==0)
  30                 throw invalid_argument("Texture1D::storage");
  31
  32         set_format(fmt);
  33         width = wd;
  34         levels = get_n_levels();
  35         if(lv)
  36                 levels = min(levels, lv);
  37 }
  38
  39 void Texture1D::allocate(unsigned level)
  40 {
  41         if(width==0)
  42                 throw invalid_operation("Texture1D::allocate");
  43         if(level>=levels)
  44                 throw invalid_argument("Texture1D::allocate");
  45
  46         bool direct = ARB_texture_storage && ARB_direct_state_access;
  47         if(!direct)
  48         {
  49                 glActiveTexture(GL_TEXTURE0);
  50                 glBindTexture(target, id);
  51         }
  52
  53         allocate_(level);
  54
  55         if(!direct)
  56                 glBindTexture(target, 0);
  57 }
  58
  59 void Texture1D::allocate_(unsigned level)
  60 {
  61         if(allocated&(1<<level))
  62                 return;
  63
  64         if(ARB_texture_storage)
  65         {
  66                 if(ARB_direct_state_access)
  67                         glTextureStorage1D(id, levels, storage_fmt, width);
  68                 else
  69                         glTexStorage1D(target, levels, storage_fmt, width);
  70                 apply_swizzle();
  71                 allocated |= (1<<levels)-1;
  72         }
  73         else
  74                 image_(level, 0);
  75 }
  76
  77 void Texture1D::image(unsigned level, const void *data)
  78 {
  79         if(width==0)
  80                 throw invalid_operation("Texture1D::image");
  81         if(level>=levels)
  82                 throw out_of_range("Texture1D::image");
  83
  84         if(ARB_texture_storage)
  85                 return sub_image(level, 0, get_level_size(level), data);
  86
  87         glActiveTexture(GL_TEXTURE0);
  88         glBindTexture(target, id);
  89
  90         image_(level, data);
  91
  92         if(auto_gen_mipmap && level==0)
  93         {
  94                 generate_mipmap_();
  95                 allocated |= (1<<levels)-1;
  96         }
  97
  98         glBindTexture(target, 0);
  99 }
 100
 101 void Texture1D::image_(unsigned level, const void *data)
 102 {
 103         if(!allocated)
 104         {
 105                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
 106                 apply_swizzle();
 107         }
 108
 109         PixelComponents comp = get_components(storage_fmt);
 110         GLenum type = get_gl_type(get_component_type(storage_fmt));
 111         glTexImage1D(target, level, storage_fmt, get_level_size(level), 0, comp, type, data);
 112
 113         allocated |= 1<<level;
 114 }
 115
 116 void Texture1D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
 117 {
 118         if(comp!=get_components(format) || type!=get_component_type(format))
 119                 throw incompatible_data("Texture1D::image");
 120         image(level, data);
 121 }
 122
 123 void Texture1D::sub_image(unsigned level, int x, unsigned wd, const void *data)
 124 {
 125         if(width==0)
 126                 throw invalid_operation("Texture1D::sub_image");
 127         if(level>=levels)
 128                 throw out_of_range("Texture1D::sub_image");
 129
 130         bool direct = (ARB_direct_state_access && (ARB_texture_storage || (allocated&(1<<level))));
 131         if(!direct)
 132         {
 133                 glActiveTexture(GL_TEXTURE0);
 134                 glBindTexture(target, id);
 135         }
 136
 137         allocate_(level);
 138
 139         PixelComponents comp = get_components(storage_fmt);
 140         GLenum type = get_gl_type(get_component_type(storage_fmt));
 141         if(ARB_direct_state_access)
 142                 glTextureSubImage1D(id, level, x, wd, comp, type, data);
 143         else
 144                 glTexSubImage1D(target, level, x, wd, comp, type, data);
 145
 146         if(auto_gen_mipmap && level==0)
 147                 generate_mipmap_();
 148
 149         if(!direct)
 150                 glBindTexture(target, 0);
 151 }
 152
 153 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelComponents comp, DataType type, const void *data)
 154 {
 155         if(comp!=get_components(format) || type!=get_component_type(format))
 156                 throw incompatible_data("Texture1D::sub_image");
 157         sub_image(level, x, wd, data);
 158 }
 159
 160 void Texture1D::image(const Graphics::Image &img, unsigned lv)
 161 {
 162         if(img.get_height()!=1)
 163                 throw incompatible_data("Texture1D::image");
 164
 165         unsigned w = img.get_width();
 166         PixelFormat fmt = pixelformat_from_image(img);
 167         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, lv);
 168
 169         image(0, img.get_pixels());
 170 }
 171
 172 unsigned Texture1D::get_n_levels() const
 173 {
 174         unsigned n = 0;
 175         for(unsigned s=width; s; s>>=1, ++n) ;
 176         return n;
 177 }
 178
 179 unsigned Texture1D::get_level_size(unsigned level) const
 180 {
 181         return width>>level;
 182 }
 183
 184 UInt64 Texture1D::get_data_size() const
 185 {
 186         return id ? width*get_pixel_size(storage_fmt) : 0;
 187 }
 188
 189
 190 Texture1D::Loader::Loader(Texture1D &t):
 191         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 192 {
 193         init();
 194 }
 195
 196 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 197         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 198 {
 199         init();
 200 }
 201
 202 void Texture1D::Loader::init()
 203 {
 204         add("raw_data", &Loader::raw_data);
 205         add("storage", &Loader::storage);
 206         add("storage", &Loader::storage_levels);
 207 }
 208
 209 void Texture1D::Loader::raw_data(const string &data)
 210 {
 211         obj.image(0, data.data());
 212 }
 213
 214 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 215 {
 216         obj.storage(fmt, w);
 217 }
 218
 219 void Texture1D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned l)
 220 {
 221         obj.storage(fmt, w, l);
 222 }
 223
 224 } // namespace GL
 225 } // namespace Msp