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