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                 Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
  48                 if(ARB_direct_state_access)
  49                         glTextureStorage1D(id, levels, ifmt, width);
  50                 else
  51                         glTexStorage1D(target, levels, ifmt, width);
  52                 apply_swizzle();
  53                 allocated |= (1<<levels)-1;
  54         }
  55         else
  56                 image(level, get_components(ifmt), get_component_type(ifmt), 0);
  57 }
  58
  59 void Texture1D::image(unsigned level, PixelComponents comp, 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, comp, type, data);
  68
  69         BindRestore _bind(this);
  70
  71         if(!allocated)
  72         {
  73                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
  74                 apply_swizzle();
  75         }
  76         glTexImage1D(target, level, ifmt, w, 0, get_upload_components(comp), type, data);
  77
  78         allocated |= 1<<level;
  79         if(auto_gen_mipmap && level==0)
  80         {
  81                 generate_mipmap();
  82                 allocated |= (1<<levels)-1;
  83         }
  84 }
  85
  86 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelComponents comp, DataType type, const void *data)
  87 {
  88         if(width==0)
  89                 throw invalid_operation("Texture3D::image");
  90
  91         Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
  92         allocate(level);
  93
  94         comp = get_upload_components(comp);
  95         if(ARB_direct_state_access)
  96                 glTextureSubImage1D(id, level, x, wd, comp, type, data);
  97         else
  98                 glTexSubImage1D(target, level, x, wd, comp, type, data);
  99
 100         if(auto_gen_mipmap && level==0)
 101                 generate_mipmap();
 102 }
 103
 104 void Texture1D::image(const Graphics::Image &img, unsigned lv, bool srgb)
 105 {
 106         if(img.get_height()!=1)
 107                 throw incompatible_data("Texture1D::image");
 108
 109         unsigned w = img.get_width();
 110         PixelFormat fmt = pixelformat_from_image(img);
 111         PixelComponents comp = get_components(fmt);
 112         DataType type = get_component_type(fmt);
 113         if(width==0)
 114                 storage(make_pixelformat(comp, type, srgb), w, lv);
 115         else if(w!=width)
 116                 throw incompatible_data("Texture1D::image");
 117
 118         image(0, comp, type, img.get_data());
 119 }
 120
 121 unsigned Texture1D::get_n_levels() const
 122 {
 123         unsigned n = 0;
 124         for(unsigned s=width; s; s>>=1, ++n) ;
 125         return n;
 126 }
 127
 128 unsigned Texture1D::get_level_size(unsigned level) const
 129 {
 130         return width>>level;
 131 }
 132
 133 UInt64 Texture1D::get_data_size() const
 134 {
 135         return id ? width*get_pixel_size(ifmt) : 0;
 136 }
 137
 138
 139 Texture1D::Loader::Loader(Texture1D &t):
 140         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 141 {
 142         init();
 143 }
 144
 145 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 146         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 147 {
 148         init();
 149 }
 150
 151 void Texture1D::Loader::init()
 152 {
 153         add("raw_data", &Loader::raw_data);
 154         add("storage", &Loader::storage);
 155         add("storage", &Loader::storage_levels);
 156 }
 157
 158 void Texture1D::Loader::raw_data(const string &data)
 159 {
 160         obj.image(0, get_components(obj.ifmt), get_component_type(obj.ifmt), data.data());
 161 }
 162
 163 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 164 {
 165         obj.storage(fmt, w);
 166 }
 167
 168 void Texture1D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned l)
 169 {
 170         obj.storage(fmt, w, l);
 171 }
 172
 173 } // namespace GL
 174 } // namespace Msp