source/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                 throw invalid_operation("Texture1D::storage");
  26         if(wd==0)
  27                 throw invalid_argument("Texture1D::storage");
  28
  29         set_format(fmt);
  30         width = wd;
  31         levels = get_n_levels();
  32         if(lv)
  33                 levels = min(levels, lv);
  34 }
  35
  36 void Texture1D::allocate(unsigned level)
  37 {
  38         if(width==0)
  39                 throw invalid_operation("Texture1D::allocate");
  40         if(level>=levels)
  41                 throw invalid_argument("Texture1D::allocate");
  42         if(allocated&(1<<level))
  43                 return;
  44
  45         if(ARB_texture_storage)
  46         {
  47                 Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
  48                 if(ARB_direct_state_access)
  49                         glTextureStorage1D(id, levels, storage_fmt, width);
  50                 else
  51                         glTexStorage1D(target, levels, storage_fmt, width);
  52                 apply_swizzle();
  53                 allocated |= (1<<levels)-1;
  54         }
  55         else
  56                 image(level, 0);
  57 }
  58
  59 void Texture1D::image(unsigned level, const void *data)
  60 {
  61         if(width==0)
  62                 throw invalid_operation("Texture1D::image");
  63
  64         unsigned w = get_level_size(level);
  65
  66         if(ARB_texture_storage)
  67                 return sub_image(level, 0, w, data);
  68
  69         BindRestore _bind(this);
  70
  71         if(!allocated)
  72         {
  73                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
  74                 apply_swizzle();
  75         }
  76
  77         PixelComponents comp = get_components(storage_fmt);
  78         DataType type = get_component_type(storage_fmt);
  79         glTexImage1D(target, level, storage_fmt, w, 0, comp, type, data);
  80
  81         allocated |= 1<<level;
  82         if(auto_gen_mipmap && level==0)
  83         {
  84                 generate_mipmap();
  85                 allocated |= (1<<levels)-1;
  86         }
  87 }
  88
  89 void Texture1D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
  90 {
  91         if(comp!=get_components(format) || type!=get_component_type(format))
  92                 throw incompatible_data("Texture1D::image");
  93         image(level, data);
  94 }
  95
  96 void Texture1D::sub_image(unsigned level, int x, unsigned wd, const void *data)
  97 {
  98         if(width==0)
  99                 throw invalid_operation("Texture3D::image");
 100
 101         Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
 102         allocate(level);
 103
 104         PixelComponents comp = get_components(storage_fmt);
 105         DataType type = get_component_type(storage_fmt);
 106         if(ARB_direct_state_access)
 107                 glTextureSubImage1D(id, level, x, wd, comp, type, data);
 108         else
 109                 glTexSubImage1D(target, level, x, wd, comp, type, data);
 110
 111         if(auto_gen_mipmap && level==0)
 112                 generate_mipmap();
 113 }
 114
 115 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelComponents comp, DataType type, const void *data)
 116 {
 117         if(comp!=get_components(format) || type!=get_component_type(format))
 118                 throw incompatible_data("Texture1D::sub_image");
 119         sub_image(level, x, wd, data);
 120 }
 121
 122 void Texture1D::image(const Graphics::Image &img, unsigned lv)
 123 {
 124         if(img.get_height()!=1)
 125                 throw incompatible_data("Texture1D::image");
 126
 127         unsigned w = img.get_width();
 128         PixelFormat fmt = pixelformat_from_image(img);
 129         if(width==0)
 130                 storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, lv);
 131         else if(w!=width)
 132                 throw incompatible_data("Texture1D::image");
 133
 134         image(0, img.get_pixels());
 135 }
 136
 137 unsigned Texture1D::get_n_levels() const
 138 {
 139         unsigned n = 0;
 140         for(unsigned s=width; s; s>>=1, ++n) ;
 141         return n;
 142 }
 143
 144 unsigned Texture1D::get_level_size(unsigned level) const
 145 {
 146         return width>>level;
 147 }
 148
 149 UInt64 Texture1D::get_data_size() const
 150 {
 151         return id ? width*get_pixel_size(storage_fmt) : 0;
 152 }
 153
 154
 155 Texture1D::Loader::Loader(Texture1D &t):
 156         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 157 {
 158         init();
 159 }
 160
 161 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 162         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 163 {
 164         init();
 165 }
 166
 167 void Texture1D::Loader::init()
 168 {
 169         add("raw_data", &Loader::raw_data);
 170         add("storage", &Loader::storage);
 171         add("storage", &Loader::storage_levels);
 172 }
 173
 174 void Texture1D::Loader::raw_data(const string &data)
 175 {
 176         obj.image(0, data.data());
 177 }
 178
 179 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 180 {
 181         obj.storage(fmt, w);
 182 }
 183
 184 void Texture1D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned l)
 185 {
 186         obj.storage(fmt, w, l);
 187 }
 188
 189 } // namespace GL
 190 } // namespace Msp