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         if(allocated&(1<<level))
  47                 return;
  48
  49         if(ARB_texture_storage)
  50         {
  51                 Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
  52                 if(ARB_direct_state_access)
  53                         glTextureStorage1D(id, levels, storage_fmt, width);
  54                 else
  55                         glTexStorage1D(target, levels, storage_fmt, width);
  56                 apply_swizzle();
  57                 allocated |= (1<<levels)-1;
  58         }
  59         else
  60                 image(level, 0);
  61 }
  62
  63 void Texture1D::image(unsigned level, const void *data)
  64 {
  65         if(width==0)
  66                 throw invalid_operation("Texture1D::image");
  67         if(level>=levels)
  68                 throw out_of_range("Texture1D::image");
  69
  70         unsigned w = get_level_size(level);
  71
  72         if(ARB_texture_storage)
  73                 return sub_image(level, 0, w, data);
  74
  75         BindRestore _bind(this);
  76
  77         if(!allocated)
  78         {
  79                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
  80                 apply_swizzle();
  81         }
  82
  83         PixelComponents comp = get_components(storage_fmt);
  84         GLenum type = get_gl_type(get_component_type(storage_fmt));
  85         glTexImage1D(target, level, storage_fmt, w, 0, comp, type, data);
  86
  87         allocated |= 1<<level;
  88         if(auto_gen_mipmap && level==0)
  89         {
  90                 generate_mipmap();
  91                 allocated |= (1<<levels)-1;
  92         }
  93 }
  94
  95 void Texture1D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
  96 {
  97         if(comp!=get_components(format) || type!=get_component_type(format))
  98                 throw incompatible_data("Texture1D::image");
  99         image(level, data);
 100 }
 101
 102 void Texture1D::sub_image(unsigned level, int x, unsigned wd, const void *data)
 103 {
 104         if(width==0)
 105                 throw invalid_operation("Texture1D::sub_image");
 106         if(level>=levels)
 107                 throw out_of_range("Texture1D::sub_image");
 108
 109         Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
 110         allocate(level);
 111
 112         PixelComponents comp = get_components(storage_fmt);
 113         GLenum type = get_gl_type(get_component_type(storage_fmt));
 114         if(ARB_direct_state_access)
 115                 glTextureSubImage1D(id, level, x, wd, comp, type, data);
 116         else
 117                 glTexSubImage1D(target, level, x, wd, comp, type, data);
 118
 119         if(auto_gen_mipmap && level==0)
 120                 generate_mipmap();
 121 }
 122
 123 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelComponents comp, DataType type, const void *data)
 124 {
 125         if(comp!=get_components(format) || type!=get_component_type(format))
 126                 throw incompatible_data("Texture1D::sub_image");
 127         sub_image(level, x, wd, data);
 128 }
 129
 130 void Texture1D::image(const Graphics::Image &img, unsigned lv)
 131 {
 132         if(img.get_height()!=1)
 133                 throw incompatible_data("Texture1D::image");
 134
 135         unsigned w = img.get_width();
 136         PixelFormat fmt = pixelformat_from_image(img);
 137         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, lv);
 138
 139         image(0, img.get_pixels());
 140 }
 141
 142 unsigned Texture1D::get_n_levels() const
 143 {
 144         unsigned n = 0;
 145         for(unsigned s=width; s; s>>=1, ++n) ;
 146         return n;
 147 }
 148
 149 unsigned Texture1D::get_level_size(unsigned level) const
 150 {
 151         return width>>level;
 152 }
 153
 154 UInt64 Texture1D::get_data_size() const
 155 {
 156         return id ? width*get_pixel_size(storage_fmt) : 0;
 157 }
 158
 159
 160 Texture1D::Loader::Loader(Texture1D &t):
 161         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 162 {
 163         init();
 164 }
 165
 166 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 167         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 168 {
 169         init();
 170 }
 171
 172 void Texture1D::Loader::init()
 173 {
 174         add("raw_data", &Loader::raw_data);
 175         add("storage", &Loader::storage);
 176         add("storage", &Loader::storage_levels);
 177 }
 178
 179 void Texture1D::Loader::raw_data(const string &data)
 180 {
 181         obj.image(0, data.data());
 182 }
 183
 184 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 185 {
 186         obj.storage(fmt, w);
 187 }
 188
 189 void Texture1D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned l)
 190 {
 191         obj.storage(fmt, w, l);
 192 }
 193
 194 } // namespace GL
 195 } // namespace Msp