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, unsigned lv)
  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         levels = get_n_levels();
  32         if(lv)
  33                 levels = min(levels, lv);
  34 }
  35
  36 void Texture1D::allocate(unsigned level)
  37 {
  38         if(width==0)
  39                 throw invalid_operation("Texture1D::allocate");
  40         if(level>=levels)
  41                 throw invalid_argument("Texture1D::allocate");
  42         if(allocated&(1<<level))
  43                 return;
  44
  45         if(ARB_texture_storage)
  46         {
  47                 if(ARB_direct_state_access)
  48                         glTextureStorage1D(id, levels, ifmt, width);
  49                 else
  50                 {
  51                         BindRestore _bind(this);
  52                         glTexStorage1D(target, levels, ifmt, width);
  53                 }
  54                 allocated |= (1<<levels)-1;
  55         }
  56         else
  57         {
  58                 PixelFormat base_fmt = get_base_pixelformat(ifmt);
  59                 image(level, base_fmt, get_alloc_type(base_fmt), 0);
  60         }
  61 }
  62
  63 void Texture1D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
  64 {
  65         if(width==0)
  66                 throw invalid_operation("Texture1D::image");
  67
  68         unsigned w = get_level_size(level);
  69
  70         if(ARB_texture_storage)
  71                 return sub_image(level, 0, w, fmt, type, data);
  72
  73         BindRestore _bind(this);
  74
  75         if(!allocated)
  76                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
  77         glTexImage1D(target, level, ifmt, w, 0, get_upload_format(fmt), type, data);
  78
  79         allocated |= 1<<level;
  80         if(auto_gen_mipmap && level==0)
  81         {
  82                 generate_mipmap();
  83                 allocated |= (1<<levels)-1;
  84         }
  85 }
  86
  87 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelFormat fmt, DataType type, const void *data)
  88 {
  89         if(width==0)
  90                 throw invalid_operation("Texture3D::image");
  91
  92         Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
  93         allocate(level);
  94
  95         fmt = get_upload_format(fmt);
  96         if(ARB_direct_state_access)
  97                 glTextureSubImage1D(id, level, x, wd, fmt, type, data);
  98         else
  99                 glTexSubImage1D(target, level, x, wd, fmt, type, data);
 100
 101         if(auto_gen_mipmap && level==0)
 102                 generate_mipmap();
 103 }
 104
 105 void Texture1D::image(const Graphics::Image &img, unsigned lv, bool srgb)
 106 {
 107         if(img.get_height()!=1)
 108                 throw incompatible_data("Texture1D::image");
 109
 110         unsigned w = img.get_width();
 111         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
 112         if(width==0)
 113         {
 114                 unsigned l = (is_mipmapped(min_filter) ? lv : 1);
 115                 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w, l);
 116         }
 117         else if(w!=width)
 118                 throw incompatible_data("Texture1D::image");
 119
 120         image(0, fmt, UNSIGNED_BYTE, img.get_data());
 121 }
 122
 123 unsigned Texture1D::get_n_levels() const
 124 {
 125         unsigned n = 0;
 126         for(unsigned s=width; s; s>>=1, ++n) ;
 127         return n;
 128 }
 129
 130 unsigned Texture1D::get_level_size(unsigned level) const
 131 {
 132         return width>>level;
 133 }
 134
 135 UInt64 Texture1D::get_data_size() const
 136 {
 137         return id ? width*get_pixel_size(ifmt) : 0;
 138 }
 139
 140
 141 Texture1D::Loader::Loader(Texture1D &t):
 142         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 143 {
 144         init();
 145 }
 146
 147 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 148         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 149 {
 150         init();
 151 }
 152
 153 void Texture1D::Loader::init()
 154 {
 155         add("raw_data", &Loader::raw_data);
 156         add("storage", &Loader::storage);
 157 }
 158
 159 void Texture1D::Loader::raw_data(const string &data)
 160 {
 161         obj.image(0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
 162 }
 163
 164 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 165 {
 166         obj.storage(fmt, w);
 167 }
 168
 169 } // namespace GL
 170 } // namespace Msp