source/texture1d.cpp

   1 #include <msp/gl/extensions/msp_texture1d.h>
   2 #include "bindable.h"
   3 #include "error.h"
   4 #include "texture1d.h"
   5
   6 using namespace std;
   7
   8 namespace Msp {
   9 namespace GL {
  10
  11 Texture1D::Texture1D():
  12         Texture(GL_TEXTURE_1D),
  13         ifmt(RGB),
  14         width(0),
  15         allocated(0)
  16 {
  17         static Require _req(MSP_texture1D);
  18 }
  19
  20 void Texture1D::storage(PixelFormat fmt, unsigned wd)
  21 {
  22         if(width>0)
  23                 throw invalid_operation("Texture1D::storage");
  24         if(wd==0)
  25                 throw invalid_argument("Texture1D::storage");
  26
  27         if(MSP_sized_internal_formats)
  28                 fmt = get_sized_pixelformat(fmt);
  29         require_pixelformat(fmt);
  30
  31         ifmt = fmt;
  32         width = wd;
  33 }
  34
  35 void Texture1D::allocate(unsigned level)
  36 {
  37         if(allocated&(1<<level))
  38                 return;
  39
  40         PixelFormat base_fmt = get_base_pixelformat(ifmt);
  41         image(level, base_fmt, get_alloc_type(base_fmt), 0);
  42 }
  43
  44 void Texture1D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
  45 {
  46         if(width==0)
  47                 throw invalid_operation("Texture1D::image");
  48
  49         unsigned w = get_level_size(level);
  50
  51         BindRestore _bind(this);
  52         glTexImage1D(target, level, ifmt, w, 0, fmt, type, data);
  53
  54         allocated |= 1<<level;
  55         if(gen_mipmap && level==0)
  56         {
  57                 auto_generate_mipmap();
  58                 allocated |= (1<<get_n_levels())-1;
  59         }
  60 }
  61
  62 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelFormat fmt, DataType type, const void *data)
  63 {
  64         if(width==0)
  65                 throw invalid_operation("Texture3D::image");
  66
  67         allocate(level);
  68
  69         BindRestore _bind(this);
  70         glTexSubImage1D(target, level, x, wd, fmt, type, data);
  71 }
  72
  73 void Texture1D::image(const Graphics::Image &img, bool srgb)
  74 {
  75         if(img.get_height()!=1)
  76                 throw incompatible_data("Texture1D::image");
  77
  78         unsigned w = img.get_width();
  79         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
  80         if(width==0)
  81                 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
  82         else if(w!=width)
  83                 throw incompatible_data("Texture1D::image");
  84
  85         image(0, fmt, UNSIGNED_BYTE, img.get_data());
  86 }
  87
  88 unsigned Texture1D::get_n_levels() const
  89 {
  90         unsigned n = 0;
  91         for(unsigned s=width; s; s>>=1, ++n) ;
  92         return n;
  93 }
  94
  95 unsigned Texture1D::get_level_size(unsigned level) const
  96 {
  97         return width>>level;
  98 }
  99
 100 UInt64 Texture1D::get_data_size() const
 101 {
 102         return id ? width*get_pixel_size(ifmt) : 0;
 103 }
 104
 105
 106 Texture1D::Loader::Loader(Texture1D &t):
 107         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 108 {
 109         init();
 110 }
 111
 112 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 113         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 114 {
 115         init();
 116 }
 117
 118 void Texture1D::Loader::init()
 119 {
 120         add("raw_data", &Loader::raw_data);
 121         add("storage", &Loader::storage);
 122 }
 123
 124 void Texture1D::Loader::raw_data(const string &data)
 125 {
 126         obj.image(0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
 127 }
 128
 129 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 130 {
 131         if(srgb)
 132                 fmt = get_srgb_pixelformat(fmt);
 133         obj.storage(fmt, w);
 134 }
 135
 136 } // namespace GL
 137 } // namespace Msp