source/texture1d.cpp

   1 #include <msp/gl/extensions/arb_texture_storage.h>
   2 #include <msp/gl/extensions/msp_texture1d.h>
   3 #include "bindable.h"
   4 #include "error.h"
   5 #include "texture1d.h"
   6
   7 using namespace std;
   8
   9 namespace Msp {
  10 namespace GL {
  11
  12 Texture1D::Texture1D():
  13         Texture(GL_TEXTURE_1D),
  14         ifmt(RGB),
  15         width(0),
  16         allocated(0)
  17 {
  18         static Require _req(MSP_texture1D);
  19 }
  20
  21 void Texture1D::storage(PixelFormat fmt, unsigned wd)
  22 {
  23         if(width>0)
  24                 throw invalid_operation("Texture1D::storage");
  25         if(wd==0)
  26                 throw invalid_argument("Texture1D::storage");
  27
  28         if(MSP_sized_internal_formats)
  29                 fmt = get_sized_pixelformat(fmt);
  30         require_pixelformat(fmt);
  31
  32         ifmt = fmt;
  33         width = wd;
  34 }
  35
  36 void Texture1D::allocate(unsigned level)
  37 {
  38         if(allocated&(1<<level))
  39                 return;
  40
  41         if(ARB_texture_storage)
  42         {
  43                 BindRestore _bind(this);
  44                 unsigned n_levels = (is_mipmapped(min_filter) ? get_n_levels() : 1);
  45                 glTexStorage1D(target, n_levels, ifmt, width);
  46                 allocated |= (1<<n_levels)-1;
  47         }
  48         else
  49         {
  50                 PixelFormat base_fmt = get_base_pixelformat(ifmt);
  51                 image(level, base_fmt, get_alloc_type(base_fmt), 0);
  52         }
  53 }
  54
  55 void Texture1D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
  56 {
  57         if(width==0)
  58                 throw invalid_operation("Texture1D::image");
  59
  60         unsigned w = get_level_size(level);
  61
  62         if(ARB_texture_storage)
  63                 return sub_image(level, 0, w, fmt, type, data);
  64
  65         BindRestore _bind(this);
  66         glTexImage1D(target, level, ifmt, w, 0, fmt, type, data);
  67
  68         allocated |= 1<<level;
  69         if(gen_mipmap && level==0)
  70         {
  71                 auto_generate_mipmap();
  72                 allocated |= (1<<get_n_levels())-1;
  73         }
  74 }
  75
  76 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelFormat fmt, DataType type, const void *data)
  77 {
  78         if(width==0)
  79                 throw invalid_operation("Texture3D::image");
  80
  81         BindRestore _bind(this);
  82         allocate(level);
  83
  84         glTexSubImage1D(target, level, x, wd, fmt, type, data);
  85
  86         if(gen_mipmap && level==0)
  87                 auto_generate_mipmap();
  88 }
  89
  90 void Texture1D::image(const Graphics::Image &img, bool srgb)
  91 {
  92         if(img.get_height()!=1)
  93                 throw incompatible_data("Texture1D::image");
  94
  95         unsigned w = img.get_width();
  96         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
  97         if(width==0)
  98                 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
  99         else if(w!=width)
 100                 throw incompatible_data("Texture1D::image");
 101
 102         image(0, fmt, UNSIGNED_BYTE, img.get_data());
 103 }
 104
 105 unsigned Texture1D::get_n_levels() const
 106 {
 107         unsigned n = 0;
 108         for(unsigned s=width; s; s>>=1, ++n) ;
 109         return n;
 110 }
 111
 112 unsigned Texture1D::get_level_size(unsigned level) const
 113 {
 114         return width>>level;
 115 }
 116
 117 UInt64 Texture1D::get_data_size() const
 118 {
 119         return id ? width*get_pixel_size(ifmt) : 0;
 120 }
 121
 122
 123 Texture1D::Loader::Loader(Texture1D &t):
 124         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 125 {
 126         init();
 127 }
 128
 129 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 130         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 131 {
 132         init();
 133 }
 134
 135 void Texture1D::Loader::init()
 136 {
 137         add("raw_data", &Loader::raw_data);
 138         add("storage", &Loader::storage);
 139 }
 140
 141 void Texture1D::Loader::raw_data(const string &data)
 142 {
 143         obj.image(0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
 144 }
 145
 146 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 147 {
 148         if(srgb)
 149                 fmt = get_srgb_pixelformat(fmt);
 150         obj.storage(fmt, w);
 151 }
 152
 153 } // namespace GL
 154 } // namespace Msp