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         BindRestore _bind(this);
  63         if(ARB_texture_storage)
  64                 sub_image(level, 0, w, fmt, type, data);
  65         else
  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         allocate(level);
  82
  83         BindRestore _bind(this);
  84         glTexSubImage1D(target, level, x, wd, fmt, type, data);
  85 }
  86
  87 void Texture1D::image(const Graphics::Image &img, bool srgb)
  88 {
  89         if(img.get_height()!=1)
  90                 throw incompatible_data("Texture1D::image");
  91
  92         unsigned w = img.get_width();
  93         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
  94         if(width==0)
  95                 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
  96         else if(w!=width)
  97                 throw incompatible_data("Texture1D::image");
  98
  99         image(0, fmt, UNSIGNED_BYTE, img.get_data());
 100 }
 101
 102 unsigned Texture1D::get_n_levels() const
 103 {
 104         unsigned n = 0;
 105         for(unsigned s=width; s; s>>=1, ++n) ;
 106         return n;
 107 }
 108
 109 unsigned Texture1D::get_level_size(unsigned level) const
 110 {
 111         return width>>level;
 112 }
 113
 114 UInt64 Texture1D::get_data_size() const
 115 {
 116         return id ? width*get_pixel_size(ifmt) : 0;
 117 }
 118
 119
 120 Texture1D::Loader::Loader(Texture1D &t):
 121         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 122 {
 123         init();
 124 }
 125
 126 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 127         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 128 {
 129         init();
 130 }
 131
 132 void Texture1D::Loader::init()
 133 {
 134         add("raw_data", &Loader::raw_data);
 135         add("storage", &Loader::storage);
 136 }
 137
 138 void Texture1D::Loader::raw_data(const string &data)
 139 {
 140         obj.image(0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
 141 }
 142
 143 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 144 {
 145         if(srgb)
 146                 fmt = get_srgb_pixelformat(fmt);
 147         obj.storage(fmt, w);
 148 }
 149
 150 } // namespace GL
 151 } // namespace Msp