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 "error.h"
   6 #include "texture1d.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace GL {
  12
  13 Texture1D::Texture1D():
  14         Texture(GL_TEXTURE_1D),
  15         width(0),
  16         allocated(0)
  17 {
  18         static Require _req(MSP_texture1D);
  19 }
  20
  21 void Texture1D::storage(PixelFormat fmt, unsigned wd, unsigned lv)
  22 {
  23         if(width>0)
  24         {
  25                 if(fmt!=format || wd!=width || (lv && lv!=levels))
  26                         throw incompatible_data("Texture1D::storage");
  27                 return;
  28         }
  29         if(wd==0)
  30                 throw invalid_argument("Texture1D::storage");
  31
  32         set_format(fmt);
  33         width = wd;
  34         levels = get_n_levels();
  35         if(lv)
  36                 levels = min(levels, lv);
  37 }
  38
  39 void Texture1D::allocate(unsigned level)
  40 {
  41         if(width==0)
  42                 throw invalid_operation("Texture1D::allocate");
  43         if(level>=levels)
  44                 throw invalid_argument("Texture1D::allocate");
  45         if(allocated&(1<<level))
  46                 return;
  47
  48         if(ARB_texture_storage)
  49         {
  50                 GLenum fmt = get_gl_pixelformat(storage_fmt);
  51                 if(ARB_direct_state_access)
  52                         glTextureStorage1D(id, levels, fmt, width);
  53                 else
  54                 {
  55                         bind_scratch();
  56                         glTexStorage1D(target, levels, fmt, width);
  57                 }
  58                 apply_swizzle();
  59                 allocated |= (1<<levels)-1;
  60         }
  61         else
  62                 image(level, 0);
  63 }
  64
  65 void Texture1D::image(unsigned level, const void *data)
  66 {
  67         if(width==0)
  68                 throw invalid_operation("Texture1D::image");
  69         if(level>=levels)
  70                 throw out_of_range("Texture1D::image");
  71
  72         if(ARB_texture_storage)
  73                 return sub_image(level, 0, get_level_size(level), data);
  74
  75         bind_scratch();
  76
  77         if(!allocated)
  78         {
  79                 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
  80                 apply_swizzle();
  81         }
  82
  83         GLenum fmt = get_gl_pixelformat(storage_fmt);
  84         GLenum comp = get_gl_components(get_components(storage_fmt));
  85         GLenum type = get_gl_type(get_component_type(storage_fmt));
  86         glTexImage1D(target, level, fmt, get_level_size(level), 0, comp, type, data);
  87
  88         allocated |= 1<<level;
  89         if(auto_gen_mipmap && level==0)
  90         {
  91                 generate_mipmap();
  92                 allocated |= (1<<levels)-1;
  93         }
  94 }
  95
  96 void Texture1D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
  97 {
  98         if(comp!=get_components(format) || type!=get_component_type(format))
  99                 throw incompatible_data("Texture1D::image");
 100         image(level, data);
 101 }
 102
 103 void Texture1D::sub_image(unsigned level, int x, unsigned wd, const void *data)
 104 {
 105         if(width==0)
 106                 throw invalid_operation("Texture1D::sub_image");
 107         if(level>=levels)
 108                 throw out_of_range("Texture1D::sub_image");
 109
 110         allocate(level);
 111
 112         GLenum comp = get_gl_components(get_components(storage_fmt));
 113         GLenum type = get_gl_type(get_component_type(storage_fmt));
 114         if(ARB_direct_state_access)
 115                 glTextureSubImage1D(id, level, x, wd, comp, type, data);
 116         else
 117         {
 118                 bind_scratch();
 119                 glTexSubImage1D(target, level, x, wd, comp, type, data);
 120         }
 121
 122         if(auto_gen_mipmap && level==0)
 123                 generate_mipmap();
 124 }
 125
 126 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelComponents comp, DataType type, const void *data)
 127 {
 128         if(comp!=get_components(format) || type!=get_component_type(format))
 129                 throw incompatible_data("Texture1D::sub_image");
 130         sub_image(level, x, wd, data);
 131 }
 132
 133 void Texture1D::image(const Graphics::Image &img, unsigned lv)
 134 {
 135         if(img.get_height()!=1)
 136                 throw incompatible_data("Texture1D::image");
 137
 138         unsigned w = img.get_width();
 139         PixelFormat fmt = pixelformat_from_image(img);
 140         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, lv);
 141
 142         image(0, img.get_pixels());
 143 }
 144
 145 unsigned Texture1D::get_n_levels() const
 146 {
 147         unsigned n = 0;
 148         for(unsigned s=width; s; s>>=1, ++n) ;
 149         return n;
 150 }
 151
 152 unsigned Texture1D::get_level_size(unsigned level) const
 153 {
 154         return width>>level;
 155 }
 156
 157 UInt64 Texture1D::get_data_size() const
 158 {
 159         return id ? width*get_pixel_size(storage_fmt) : 0;
 160 }
 161
 162
 163 Texture1D::Loader::Loader(Texture1D &t):
 164         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 165 {
 166         init();
 167 }
 168
 169 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 170         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 171 {
 172         init();
 173 }
 174
 175 void Texture1D::Loader::init()
 176 {
 177         add("raw_data", &Loader::raw_data);
 178         add("storage", &Loader::storage);
 179         add("storage", &Loader::storage_levels);
 180 }
 181
 182 void Texture1D::Loader::raw_data(const string &data)
 183 {
 184         obj.image(0, data.data());
 185 }
 186
 187 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 188 {
 189         obj.storage(fmt, w);
 190 }
 191
 192 void Texture1D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned l)
 193 {
 194         obj.storage(fmt, w, l);
 195 }
 196
 197 } // namespace GL
 198 } // namespace Msp