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 }
  90
  91 void Texture1D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
  92 {
  93         if(comp!=get_components(format) || type!=get_component_type(format))
  94                 throw incompatible_data("Texture1D::image");
  95         image(level, data);
  96 }
  97
  98 void Texture1D::sub_image(unsigned level, int x, unsigned wd, const void *data)
  99 {
 100         if(width==0)
 101                 throw invalid_operation("Texture1D::sub_image");
 102         if(level>=levels)
 103                 throw out_of_range("Texture1D::sub_image");
 104
 105         allocate(level);
 106
 107         GLenum comp = get_gl_components(get_components(storage_fmt));
 108         GLenum type = get_gl_type(get_component_type(storage_fmt));
 109         if(ARB_direct_state_access)
 110                 glTextureSubImage1D(id, level, x, wd, comp, type, data);
 111         else
 112         {
 113                 bind_scratch();
 114                 glTexSubImage1D(target, level, x, wd, comp, type, data);
 115         }
 116 }
 117
 118 void Texture1D::sub_image(unsigned level, int x, unsigned wd, PixelComponents comp, DataType type, const void *data)
 119 {
 120         if(comp!=get_components(format) || type!=get_component_type(format))
 121                 throw incompatible_data("Texture1D::sub_image");
 122         sub_image(level, x, wd, data);
 123 }
 124
 125 void Texture1D::image(const Graphics::Image &img, unsigned lv)
 126 {
 127         if(img.get_height()!=1)
 128                 throw incompatible_data("Texture1D::image");
 129
 130         unsigned w = img.get_width();
 131         PixelFormat fmt = pixelformat_from_image(img);
 132         storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, lv);
 133
 134         image(0, img.get_pixels());
 135 }
 136
 137 unsigned Texture1D::get_n_levels() const
 138 {
 139         unsigned n = 0;
 140         for(unsigned s=width; s; s>>=1, ++n) ;
 141         return n;
 142 }
 143
 144 unsigned Texture1D::get_level_size(unsigned level) const
 145 {
 146         return width>>level;
 147 }
 148
 149 uint64_t Texture1D::get_data_size() const
 150 {
 151         return id ? width*get_pixel_size(storage_fmt) : 0;
 152 }
 153
 154
 155 Texture1D::Loader::Loader(Texture1D &t):
 156         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t)
 157 {
 158         init();
 159 }
 160
 161 Texture1D::Loader::Loader(Texture1D &t, Collection &c):
 162         DataFile::DerivedObjectLoader<Texture1D, Texture::Loader>(t, c)
 163 {
 164         init();
 165 }
 166
 167 void Texture1D::Loader::init()
 168 {
 169         add("raw_data", &Loader::raw_data);
 170         add("storage", &Loader::storage);
 171         add("storage", &Loader::storage_levels);
 172 }
 173
 174 void Texture1D::Loader::raw_data(const string &data)
 175 {
 176         obj.image(0, data.data());
 177 }
 178
 179 void Texture1D::Loader::storage(PixelFormat fmt, unsigned w)
 180 {
 181         obj.storage(fmt, w);
 182 }
 183
 184 void Texture1D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned l)
 185 {
 186         obj.storage(fmt, w, l);
 187 }
 188
 189 } // namespace GL
 190 } // namespace Msp