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 bool direct = ARB_texture_storage && ARB_direct_state_access;
86 glActiveTexture(GL_TEXTURE0);
87 glBindTexture(target, id);
93 glBindTexture(target, 0);
96 void TextureCube::allocate_(unsigned level)
98 if(ARB_texture_storage)
100 if(ARB_direct_state_access)
101 glTextureStorage2D(id, levels, storage_fmt, size, size);
103 glTexStorage2D(target, levels, storage_fmt, size, size);
105 allocated |= (64<<levels)-1;
109 for(unsigned i=0; i<6; ++i)
110 image_(enumerate_faces(i), level, 0);
114 void TextureCube::image(TextureCubeFace face, unsigned level, const void *data)
117 throw invalid_operation("TextureCube::image");
119 throw out_of_range("TextureCube::image");
121 if(ARB_texture_storage)
123 unsigned lsz = get_level_size(level);
124 return sub_image(face, level, 0, 0, lsz, lsz, data);
127 glActiveTexture(GL_TEXTURE0);
128 glBindTexture(target, id);
130 image_(face, level, data);
132 if(auto_gen_mipmap && level==0 && (allocated&63)==63)
135 allocated |= (64<<levels)-1;
138 glBindTexture(target, 0);
141 void TextureCube::image_(TextureCubeFace face, unsigned level, const void *data)
145 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
149 unsigned lsz = get_level_size(level);
150 PixelComponents comp = get_components(storage_fmt);
151 GLenum type = get_gl_type(get_component_type(storage_fmt));
152 glTexImage2D(face, level, storage_fmt, lsz, lsz, 0, comp, type, data);
156 allocated |= 1<<get_face_index(face);
157 if((allocated&63)==63)
160 else if(!(allocated&(64<<level)))
162 for(unsigned i=0; i<6; ++i)
163 if(enumerate_faces(i)!=face)
164 glTexImage2D(enumerate_faces(i), level, storage_fmt, lsz, lsz, 0, comp, type, 0);
166 allocated |= 64<<level;
170 void TextureCube::image(TextureCubeFace face, unsigned level, PixelComponents comp, DataType type, const void *data)
172 if(comp!=get_components(format) || type!=get_component_type(format))
173 throw incompatible_data("TextureCube::image");
174 image(face, level, data);
177 void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, const void *data)
180 throw invalid_operation("TextureCube::sub_image");
182 throw out_of_range("TextureCube::sub_image");
184 bool direct = (ARB_direct_state_access && (ARB_texture_storage || (allocated&(1<<level))));
187 glActiveTexture(GL_TEXTURE0);
188 glBindTexture(target, id);
193 PixelComponents comp = get_components(storage_fmt);
194 GLenum type = get_gl_type(get_component_type(storage_fmt));
195 if(ARB_direct_state_access)
196 glTextureSubImage3D(id, level, x, y, get_face_index(face), wd, ht, 1, comp, type, data);
198 glTexSubImage2D(face, level, x, y, wd, ht, comp, type, data);
200 if(auto_gen_mipmap && level==0)
204 glBindTexture(target, 0);
207 void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, PixelComponents comp, DataType type, const void *data)
209 if(comp!=get_components(format) || type!=get_component_type(format))
210 throw incompatible_data("TextureCube::subimage");
211 sub_image(face, level, x, y, wd, ht, data);
214 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img)
216 unsigned w = img.get_width();
217 unsigned h = img.get_height();
219 throw incompatible_data("TextureCube::image");
221 PixelFormat fmt = pixelformat_from_image(img);
222 storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w);
224 image(face, 0, img.get_pixels());
227 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img, bool)
232 void TextureCube::image(const Graphics::Image &img, unsigned lv)
234 unsigned w = img.get_width();
235 unsigned h = img.get_height();
238 throw incompatible_data("TextureCube::image");
241 PixelFormat fmt = pixelformat_from_image(img);
243 storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, lv);
244 else if(w!=size || h!=size)
245 throw incompatible_data("TextureCube::image");
247 const char *pixels = reinterpret_cast<const char *>(img.get_pixels());
248 unsigned face_size = img.get_stride()*size;
249 for(unsigned i=0; i<6; ++i)
250 image(enumerate_faces(i), 0, pixels+i*face_size);
253 unsigned TextureCube::get_n_levels() const
256 for(unsigned s=size; s; s>>=1, ++n) ;
260 unsigned TextureCube::get_level_size(unsigned level) const
265 TextureCubeFace TextureCube::enumerate_faces(unsigned i)
268 throw out_of_range("TextureCube::enumerate_faces");
269 return face_order[i];
272 unsigned TextureCube::get_face_index(TextureCubeFace face)
276 case POSITIVE_X: return 0;
277 case NEGATIVE_X: return 1;
278 case POSITIVE_Y: return 2;
279 case NEGATIVE_Y: return 3;
280 case POSITIVE_Z: return 4;
281 case NEGATIVE_Z: return 5;
282 default: throw invalid_argument("TextureCube::get_face_index");
286 const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
288 return directions[get_face_index(face)];
291 const Vector3 &TextureCube::get_s_direction(TextureCubeFace face)
293 return directions[orientations[get_face_index(face)*2]];
296 const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
298 return directions[orientations[get_face_index(face)*2+1]];
301 Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)
303 float s = (u+0.5f)*2.0f/size-1.0f;
304 float t = (v+0.5f)*2.0f/size-1.0f;
305 const Vector3 &fv = get_face_direction(face);
306 const Vector3 &sv = get_s_direction(face);
307 const Vector3 &tv = get_t_direction(face);
311 UInt64 TextureCube::get_data_size() const
313 return id ? size*size*6*get_pixel_size(storage_fmt) : 0;
317 TextureCube::Loader::Loader(TextureCube &t):
318 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
323 TextureCube::Loader::Loader(TextureCube &t, Collection &c):
324 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t, c)
329 void TextureCube::Loader::init()
331 add("external_image", &Loader::external_image);
332 add("image_data", &Loader::image_data);
333 add("raw_data", &Loader::raw_data);
334 add("storage", &Loader::storage);
335 add("storage", &Loader::storage_levels);
338 void TextureCube::Loader::external_image(TextureCubeFace face, const string &fn)
341 RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
344 obj.image(face, img);
347 void TextureCube::Loader::image_data(TextureCubeFace face, const string &data)
350 IO::Memory mem(data.data(), data.size());
353 obj.image(face, img);
356 void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
358 obj.image(face, 0, data.data());
361 void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
366 void TextureCube::Loader::storage_levels(PixelFormat fmt, unsigned s, unsigned l)
368 obj.storage(fmt, s, l);
372 void operator>>(const LexicalConverter &conv, TextureCubeFace &face)
374 const string &str = conv.get();
375 if(str=="POSITIVE_X")
377 else if(str=="NEGATIVE_X")
379 else if(str=="POSITIVE_Y")
381 else if(str=="NEGATIVE_Y")
383 else if(str=="POSITIVE_Z")
385 else if(str=="NEGATIVE_Z")
388 throw lexical_error(format("conversion of '%s' to TextureCubeFace", str));