1 #include <msp/datafile/collection.h>
2 #include <msp/gl/extensions/arb_direct_state_access.h>
3 #include <msp/gl/extensions/arb_seamless_cube_map.h>
4 #include <msp/gl/extensions/arb_texture_cube_map.h>
5 #include <msp/gl/extensions/arb_texture_storage.h>
6 #include <msp/io/memory.h>
7 #include <msp/strings/format.h>
9 #include "texturecube.h"
16 TextureCubeFace TextureCube::face_order[6] =
26 Vector3 TextureCube::directions[6] =
36 unsigned TextureCube::orientations[12] =
46 TextureCube::TextureCube():
47 Texture(GL_TEXTURE_CUBE_MAP),
51 static Require _req(ARB_texture_cube_map);
52 if(ARB_seamless_cube_map)
53 glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
56 void TextureCube::storage(PixelFormat fmt, unsigned sz, unsigned lv)
60 if(fmt!=format || sz!=size || (lv && lv!=levels))
61 throw incompatible_data("TextureCube::storage");
65 throw invalid_argument("TextureCube::storage");
69 levels = get_n_levels();
71 levels = min(levels, lv);
74 void TextureCube::allocate(unsigned level)
77 throw invalid_operation("TextureCube::allocate");
79 throw invalid_argument("TextureCube::allocate");
80 if(allocated&(64<<level))
83 if(ARB_texture_storage)
85 GLenum fmt = get_gl_pixelformat(storage_fmt);
86 if(ARB_direct_state_access)
87 glTextureStorage2D(id, levels, fmt, size, size);
91 glTexStorage2D(target, levels, fmt, size, size);
94 allocated |= (64<<levels)-1;
98 for(unsigned i=0; i<6; ++i)
99 image(enumerate_faces(i), level, 0);
103 void TextureCube::image(TextureCubeFace face, unsigned level, const void *data)
106 throw invalid_operation("TextureCube::image");
108 throw out_of_range("TextureCube::image");
110 unsigned lsz = get_level_size(level);
112 if(ARB_texture_storage)
113 return sub_image(face, level, 0, 0, lsz, lsz, data);
117 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
121 GLenum fmt = get_gl_pixelformat(storage_fmt);
122 GLenum comp = get_gl_components(get_components(storage_fmt));
123 GLenum type = get_gl_type(get_component_type(storage_fmt));
124 glTexImage2D(face, level, fmt, lsz, lsz, 0, comp, type, data);
128 allocated |= 1<<get_face_index(face);
129 if((allocated&63)==63)
132 else if(!(allocated&(64<<level)))
134 for(unsigned i=0; i<6; ++i)
135 if(enumerate_faces(i)!=face)
136 glTexImage2D(enumerate_faces(i), level, fmt, lsz, lsz, 0, comp, type, 0);
138 allocated |= 64<<level;
142 void TextureCube::image(TextureCubeFace face, unsigned level, PixelComponents comp, DataType type, const void *data)
144 if(comp!=get_components(format) || type!=get_component_type(format))
145 throw incompatible_data("TextureCube::image");
146 image(face, level, data);
149 void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, const void *data)
152 throw invalid_operation("TextureCube::sub_image");
154 throw out_of_range("TextureCube::sub_image");
158 GLenum comp = get_gl_components(get_components(storage_fmt));
159 GLenum type = get_gl_type(get_component_type(storage_fmt));
160 if(ARB_direct_state_access)
161 glTextureSubImage3D(id, level, x, y, get_face_index(face), wd, ht, 1, comp, type, data);
165 glTexSubImage2D(face, level, x, y, wd, ht, comp, type, data);
169 void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, PixelComponents comp, DataType type, const void *data)
171 if(comp!=get_components(format) || type!=get_component_type(format))
172 throw incompatible_data("TextureCube::subimage");
173 sub_image(face, level, x, y, wd, ht, data);
176 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img)
178 unsigned w = img.get_width();
179 unsigned h = img.get_height();
181 throw incompatible_data("TextureCube::image");
183 PixelFormat fmt = pixelformat_from_image(img);
184 storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w);
186 image(face, 0, img.get_pixels());
189 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img, bool)
194 void TextureCube::image(const Graphics::Image &img, unsigned lv)
196 unsigned w = img.get_width();
197 unsigned h = img.get_height();
200 throw incompatible_data("TextureCube::image");
203 PixelFormat fmt = pixelformat_from_image(img);
205 storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, lv);
206 else if(w!=size || h!=size)
207 throw incompatible_data("TextureCube::image");
209 const char *pixels = reinterpret_cast<const char *>(img.get_pixels());
210 unsigned face_size = img.get_stride()*size;
211 for(unsigned i=0; i<6; ++i)
212 image(enumerate_faces(i), 0, pixels+i*face_size);
215 unsigned TextureCube::get_n_levels() const
218 for(unsigned s=size; s; s>>=1, ++n) ;
222 unsigned TextureCube::get_level_size(unsigned level) const
227 TextureCubeFace TextureCube::enumerate_faces(unsigned i)
230 throw out_of_range("TextureCube::enumerate_faces");
231 return face_order[i];
234 unsigned TextureCube::get_face_index(TextureCubeFace face)
238 case POSITIVE_X: return 0;
239 case NEGATIVE_X: return 1;
240 case POSITIVE_Y: return 2;
241 case NEGATIVE_Y: return 3;
242 case POSITIVE_Z: return 4;
243 case NEGATIVE_Z: return 5;
244 default: throw invalid_argument("TextureCube::get_face_index");
248 const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
250 return directions[get_face_index(face)];
253 const Vector3 &TextureCube::get_s_direction(TextureCubeFace face)
255 return directions[orientations[get_face_index(face)*2]];
258 const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
260 return directions[orientations[get_face_index(face)*2+1]];
263 Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)
265 float s = (u+0.5f)*2.0f/size-1.0f;
266 float t = (v+0.5f)*2.0f/size-1.0f;
267 const Vector3 &fv = get_face_direction(face);
268 const Vector3 &sv = get_s_direction(face);
269 const Vector3 &tv = get_t_direction(face);
273 UInt64 TextureCube::get_data_size() const
275 return id ? size*size*6*get_pixel_size(storage_fmt) : 0;
279 TextureCube::Loader::Loader(TextureCube &t):
280 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
285 TextureCube::Loader::Loader(TextureCube &t, Collection &c):
286 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t, c)
291 void TextureCube::Loader::init()
293 add("external_image", &Loader::external_image);
294 add("image_data", &Loader::image_data);
295 add("raw_data", &Loader::raw_data);
296 add("storage", &Loader::storage);
297 add("storage", &Loader::storage_levels);
300 void TextureCube::Loader::external_image(TextureCubeFace face, const string &fn)
303 RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
306 obj.image(face, img);
309 void TextureCube::Loader::image_data(TextureCubeFace face, const string &data)
312 IO::Memory mem(data.data(), data.size());
315 obj.image(face, img);
318 void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
320 obj.image(face, 0, data.data());
323 void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
328 void TextureCube::Loader::storage_levels(PixelFormat fmt, unsigned s, unsigned l)
330 obj.storage(fmt, s, l);
334 void operator>>(const LexicalConverter &conv, TextureCubeFace &face)
336 const string &str = conv.get();
337 if(str=="POSITIVE_X")
339 else if(str=="NEGATIVE_X")
341 else if(str=="POSITIVE_Y")
343 else if(str=="NEGATIVE_Y")
345 else if(str=="POSITIVE_Z")
347 else if(str=="NEGATIVE_Z")
350 throw lexical_error(format("conversion of '%s' to TextureCubeFace", str));