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, get_upload_format(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         fmt = get_upload_format(fmt);
  87         if(ARB_direct_state_access)
  88                 glTextureSubImage1D(id, level, x, wd, fmt, type, data);
  89         else
  90                 glTexSubImage1D(target, level, x, wd, fmt, type, data);
  91
  92         if(gen_mipmap && level==0)
  93                 auto_generate_mipmap();
  94 }
  95
  96 void Texture1D::image(const Graphics::Image &img, bool srgb)
  97 {
  98         if(img.get_height()!=1)
  99                 throw incompatible_data("Texture1D::image");
 100
 101         unsigned w = img.get_width();
 102         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
 103         if(width==0)
 104                 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
 105         else if(w!=width)
 106                 throw incompatible_data("Texture1D::image");
 107
 108         image(0, fmt, UNSIGNED_BYTE, img.get_data());
 109 }
 110
 111 unsigned Texture1D::get_n_levels() const
 112 {
 113         unsigned n = 0;
 114         for(unsigned s=width; s; s>>=1, ++n) ;
 115         return n;
 116 }
 117
 118 unsigned Texture1D::get_level_size(unsigned level) const
 119 {
 120         return width>>level;
 121 }
 122
 123 UInt64 Texture1D::get_data_size() const
 124 {
 125         return id ? width*get_pixel_size(ifmt) : 0;
 126 }
 127
 128
 129 Texture1D::Loader::Loader(Texture1D &t):
 130         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 131 {
 132         init();
 133 }
 134
 135 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 136         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 137 {
 138         init();
 139 }
 140
 141 void Texture1D::Loader::init()
 142 {
 143         add("raw_data", &Loader::raw_data);
 144         add("storage", &Loader::storage);
 145 }
 146
 147 void Texture1D::Loader::raw_data(const string &data)
 148 {
 149         obj.image(0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
 150 }
 151
 152 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 153 {
 154         if(srgb)
 155                 fmt = get_srgb_pixelformat(fmt);
 156         obj.storage(fmt, w);
 157 }
 158
 159 } // namespace GL
 160 } // namespace Msp