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         ifmt(RGB),
  17         width(0),
  18         allocated(0)
  19 {
  20         static Require _req(MSP_texture1D);
  21 }
  22
  23 void Texture1D::storage(PixelFormat fmt, unsigned wd)
  24 {
  25         if(width>0)
  26                 throw invalid_operation("Texture1D::storage");
  27         if(wd==0)
  28                 throw invalid_argument("Texture1D::storage");
  29
  30         if(MSP_sized_internal_formats)
  31                 fmt = get_sized_pixelformat(fmt);
  32         require_pixelformat(fmt);
  33
  34         ifmt = fmt;
  35         width = wd;
  36 }
  37
  38 void Texture1D::allocate(unsigned level)
  39 {
  40         if(allocated&(1<<level))
  41                 return;
  42
  43         if(ARB_texture_storage)
  44         {
  45                 unsigned n_levels = (is_mipmapped(min_filter) ? get_n_levels() : 1);
  46                 if(ARB_direct_state_access)
  47                         glTextureStorage1D(id, n_levels, ifmt, width);
  48                 else
  49                 {
  50                         BindRestore _bind(this);
  51                         glTexStorage1D(target, n_levels, ifmt, width);
  52                 }
  53                 allocated |= (1<<n_levels)-1;
  54         }
  55         else
  56         {
  57                 PixelFormat base_fmt = get_base_pixelformat(ifmt);
  58                 image(level, base_fmt, get_alloc_type(base_fmt), 0);
  59         }
  60 }
  61
  62 void Texture1D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
  63 {
  64         if(width==0)
  65                 throw invalid_operation("Texture1D::image");
  66
  67         unsigned w = get_level_size(level);
  68
  69         if(ARB_texture_storage)
  70                 return sub_image(level, 0, w, fmt, type, data);
  71
  72         BindRestore _bind(this);
  73         glTexImage1D(target, level, ifmt, w, 0, fmt, type, data);
  74
  75         allocated |= 1<<level;
  76         if(gen_mipmap && level==0)
  77         {
  78                 auto_generate_mipmap();
  79                 allocated |= (1<<get_n_levels())-1;
  80         }
  81 }
  82
  83 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelFormat fmt, DataType type, const void *data)
  84 {
  85         if(width==0)
  86                 throw invalid_operation("Texture3D::image");
  87
  88         Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
  89         allocate(level);
  90
  91         if(ARB_direct_state_access)
  92                 glTextureSubImage1D(id, level, x, wd, fmt, type, data);
  93         else
  94                 glTexSubImage1D(target, level, x, wd, fmt, type, data);
  95
  96         if(gen_mipmap && level==0)
  97                 auto_generate_mipmap();
  98 }
  99
 100 void Texture1D::image(const Graphics::Image &img, bool srgb)
 101 {
 102         if(img.get_height()!=1)
 103                 throw incompatible_data("Texture1D::image");
 104
 105         unsigned w = img.get_width();
 106         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
 107         if(width==0)
 108                 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
 109         else if(w!=width)
 110                 throw incompatible_data("Texture1D::image");
 111
 112         image(0, fmt, UNSIGNED_BYTE, img.get_data());
 113 }
 114
 115 unsigned Texture1D::get_n_levels() const
 116 {
 117         unsigned n = 0;
 118         for(unsigned s=width; s; s>>=1, ++n) ;
 119         return n;
 120 }
 121
 122 unsigned Texture1D::get_level_size(unsigned level) const
 123 {
 124         return width>>level;
 125 }
 126
 127 UInt64 Texture1D::get_data_size() const
 128 {
 129         return id ? width*get_pixel_size(ifmt) : 0;
 130 }
 131
 132
 133 Texture1D::Loader::Loader(Texture1D &t):
 134         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 135 {
 136         init();
 137 }
 138
 139 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 140         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 141 {
 142         init();
 143 }
 144
 145 void Texture1D::Loader::init()
 146 {
 147         add("raw_data", &Loader::raw_data);
 148         add("storage", &Loader::storage);
 149 }
 150
 151 void Texture1D::Loader::raw_data(const string &data)
 152 {
 153         obj.image(0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
 154 }
 155
 156 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 157 {
 158         if(srgb)
 159                 fmt = get_srgb_pixelformat(fmt);
 160         obj.storage(fmt, w);
 161 }
 162
 163 } // namespace GL
 164 } // namespace Msp