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