source/core/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         {
  26                 if(fmt!=format || wd!=width || (lv && lv!=levels))
  27                         throw incompatible_data("Texture1D::storage");
  28                 return;
  29         }
  30         if(wd==0)
  31                 throw invalid_argument("Texture1D::storage");
  32
  33         set_format(fmt);
  34         width = wd;
  35         levels = get_n_levels();
  36         if(lv)
  37                 levels = min(levels, lv);
  38 }
  39
  40 void Texture1D::allocate(unsigned level)
  41 {
  42         if(width==0)
  43                 throw invalid_operation("Texture1D::allocate");
  44         if(level>=levels)
  45                 throw invalid_argument("Texture1D::allocate");
  46         if(allocated&(1<<level))
  47                 return;
  48
  49         if(ARB_texture_storage)
  50         {
  51                 Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
  52                 if(ARB_direct_state_access)
  53                         glTextureStorage1D(id, levels, storage_fmt, width);
  54                 else
  55                         glTexStorage1D(target, levels, storage_fmt, width);
  56                 apply_swizzle();
  57                 allocated |= (1<<levels)-1;
  58         }
  59         else
  60                 image(level, 0);
  61 }
  62
  63 void Texture1D::image(unsigned level, 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, data);
  72
  73         BindRestore _bind(this);
  74
  75         if(!allocated)
  76         {
  77                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
  78                 apply_swizzle();
  79         }
  80
  81         PixelComponents comp = get_components(storage_fmt);
  82         GLenum type = get_gl_type(get_component_type(storage_fmt));
  83         glTexImage1D(target, level, storage_fmt, w, 0, comp, type, data);
  84
  85         allocated |= 1<<level;
  86         if(auto_gen_mipmap && level==0)
  87         {
  88                 generate_mipmap();
  89                 allocated |= (1<<levels)-1;
  90         }
  91 }
  92
  93 void Texture1D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
  94 {
  95         if(comp!=get_components(format) || type!=get_component_type(format))
  96                 throw incompatible_data("Texture1D::image");
  97         image(level, data);
  98 }
  99
 100 void Texture1D::sub_image(unsigned level, int x, unsigned wd, const void *data)
 101 {
 102         if(width==0)
 103                 throw invalid_operation("Texture3D::image");
 104
 105         Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
 106         allocate(level);
 107
 108         PixelComponents comp = get_components(storage_fmt);
 109         GLenum type = get_gl_type(get_component_type(storage_fmt));
 110         if(ARB_direct_state_access)
 111                 glTextureSubImage1D(id, level, x, wd, comp, type, data);
 112         else
 113                 glTexSubImage1D(target, level, x, wd, comp, type, data);
 114
 115         if(auto_gen_mipmap && level==0)
 116                 generate_mipmap();
 117 }
 118
 119 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelComponents comp, DataType type, const void *data)
 120 {
 121         if(comp!=get_components(format) || type!=get_component_type(format))
 122                 throw incompatible_data("Texture1D::sub_image");
 123         sub_image(level, x, wd, data);
 124 }
 125
 126 void Texture1D::image(const Graphics::Image &img, unsigned lv)
 127 {
 128         if(img.get_height()!=1)
 129                 throw incompatible_data("Texture1D::image");
 130
 131         unsigned w = img.get_width();
 132         PixelFormat fmt = pixelformat_from_image(img);
 133         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, lv);
 134
 135         image(0, img.get_pixels());
 136 }
 137
 138 unsigned Texture1D::get_n_levels() const
 139 {
 140         unsigned n = 0;
 141         for(unsigned s=width; s; s>>=1, ++n) ;
 142         return n;
 143 }
 144
 145 unsigned Texture1D::get_level_size(unsigned level) const
 146 {
 147         return width>>level;
 148 }
 149
 150 UInt64 Texture1D::get_data_size() const
 151 {
 152         return id ? width*get_pixel_size(storage_fmt) : 0;
 153 }
 154
 155
 156 Texture1D::Loader::Loader(Texture1D &t):
 157         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 158 {
 159         init();
 160 }
 161
 162 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 163         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 164 {
 165         init();
 166 }
 167
 168 void Texture1D::Loader::init()
 169 {
 170         add("raw_data", &Loader::raw_data);
 171         add("storage", &Loader::storage);
 172         add("storage", &Loader::storage_levels);
 173 }
 174
 175 void Texture1D::Loader::raw_data(const string &data)
 176 {
 177         obj.image(0, data.data());
 178 }
 179
 180 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 181 {
 182         obj.storage(fmt, w);
 183 }
 184
 185 void Texture1D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned l)
 186 {
 187         obj.storage(fmt, w, l);
 188 }
 189
 190 } // namespace GL
 191 } // namespace Msp