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