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         {
  57                 PixelFormat base_fmt = get_base_pixelformat(ifmt);
  58                 image(level, base_fmt, get_alloc_type(base_fmt), 0);
  59         }
  60 }
  61
  62 void Texture1D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
  63 {
  64         if(width==0)
  65                 throw invalid_operation("Texture1D::image");
  66
  67         unsigned w = get_level_size(level);
  68
  69         if(ARB_texture_storage)
  70                 return sub_image(level, 0, w, fmt, type, data);
  71
  72         BindRestore _bind(this);
  73
  74         if(!allocated)
  75         {
  76                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
  77                 apply_swizzle();
  78         }
  79         glTexImage1D(target, level, ifmt, w, 0, get_upload_format(fmt), type, data);
  80
  81         allocated |= 1<<level;
  82         if(auto_gen_mipmap && level==0)
  83         {
  84                 generate_mipmap();
  85                 allocated |= (1<<levels)-1;
  86         }
  87 }
  88
  89 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelFormat fmt, DataType type, const void *data)
  90 {
  91         if(width==0)
  92                 throw invalid_operation("Texture3D::image");
  93
  94         Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
  95         allocate(level);
  96
  97         fmt = get_upload_format(fmt);
  98         if(ARB_direct_state_access)
  99                 glTextureSubImage1D(id, level, x, wd, fmt, type, data);
 100         else
 101                 glTexSubImage1D(target, level, x, wd, fmt, type, data);
 102
 103         if(auto_gen_mipmap && level==0)
 104                 generate_mipmap();
 105 }
 106
 107 void Texture1D::image(const Graphics::Image &img, unsigned lv, bool srgb)
 108 {
 109         if(img.get_height()!=1)
 110                 throw incompatible_data("Texture1D::image");
 111
 112         unsigned w = img.get_width();
 113         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
 114         if(width==0)
 115                 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w, lv);
 116         else if(w!=width)
 117                 throw incompatible_data("Texture1D::image");
 118
 119         image(0, fmt, UNSIGNED_BYTE, img.get_data());
 120 }
 121
 122 unsigned Texture1D::get_n_levels() const
 123 {
 124         unsigned n = 0;
 125         for(unsigned s=width; s; s>>=1, ++n) ;
 126         return n;
 127 }
 128
 129 unsigned Texture1D::get_level_size(unsigned level) const
 130 {
 131         return width>>level;
 132 }
 133
 134 UInt64 Texture1D::get_data_size() const
 135 {
 136         return id ? width*get_pixel_size(ifmt) : 0;
 137 }
 138
 139
 140 Texture1D::Loader::Loader(Texture1D &t):
 141         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 142 {
 143         init();
 144 }
 145
 146 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 147         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 148 {
 149         init();
 150 }
 151
 152 void Texture1D::Loader::init()
 153 {
 154         add("raw_data", &Loader::raw_data);
 155         add("storage", &Loader::storage);
 156         add("storage", &Loader::storage_levels);
 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 void Texture1D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned l)
 170 {
 171         obj.storage(fmt, w, l);
 172 }
 173
 174 } // namespace GL
 175 } // namespace Msp