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");
81 bool direct = ARB_texture_storage && ARB_direct_state_access;
84 glActiveTexture(GL_TEXTURE0);
85 glBindTexture(target, id);
91 glBindTexture(target, 0);
94 void TextureCube::allocate_(unsigned level)
96 if(allocated&(64<<level))
99 if(ARB_texture_storage)
101 GLenum fmt = get_gl_pixelformat(storage_fmt);
102 if(ARB_direct_state_access)
103 glTextureStorage2D(id, levels, fmt, size, size);
105 glTexStorage2D(target, levels, fmt, size, size);
107 allocated |= (64<<levels)-1;
111 for(unsigned i=0; i<6; ++i)
112 image_(enumerate_faces(i), level, 0);
116 void TextureCube::image(TextureCubeFace face, unsigned level, const void *data)
119 throw invalid_operation("TextureCube::image");
121 throw out_of_range("TextureCube::image");
123 if(ARB_texture_storage)
125 unsigned lsz = get_level_size(level);
126 return sub_image(face, level, 0, 0, lsz, lsz, data);
129 glActiveTexture(GL_TEXTURE0);
130 glBindTexture(target, id);
132 image_(face, level, data);
134 if(auto_gen_mipmap && level==0 && (allocated&63)==63)
137 allocated |= (64<<levels)-1;
140 glBindTexture(target, 0);
143 void TextureCube::image_(TextureCubeFace face, unsigned level, const void *data)
147 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
151 unsigned lsz = get_level_size(level);
152 GLenum fmt = get_gl_pixelformat(storage_fmt);
153 GLenum comp = get_gl_components(get_components(storage_fmt));
154 GLenum type = get_gl_type(get_component_type(storage_fmt));
155 glTexImage2D(face, level, fmt, lsz, lsz, 0, comp, type, data);
159 allocated |= 1<<get_face_index(face);
160 if((allocated&63)==63)
163 else if(!(allocated&(64<<level)))
165 for(unsigned i=0; i<6; ++i)
166 if(enumerate_faces(i)!=face)
167 glTexImage2D(enumerate_faces(i), level, fmt, lsz, lsz, 0, comp, type, 0);
169 allocated |= 64<<level;
173 void TextureCube::image(TextureCubeFace face, unsigned level, PixelComponents comp, DataType type, const void *data)
175 if(comp!=get_components(format) || type!=get_component_type(format))
176 throw incompatible_data("TextureCube::image");
177 image(face, level, data);
180 void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, const void *data)
183 throw invalid_operation("TextureCube::sub_image");
185 throw out_of_range("TextureCube::sub_image");
187 bool direct = (ARB_direct_state_access && (ARB_texture_storage || (allocated&(1<<level))));
190 glActiveTexture(GL_TEXTURE0);
191 glBindTexture(target, id);
196 GLenum comp = get_gl_components(get_components(storage_fmt));
197 GLenum type = get_gl_type(get_component_type(storage_fmt));
198 if(ARB_direct_state_access)
199 glTextureSubImage3D(id, level, x, y, get_face_index(face), wd, ht, 1, comp, type, data);
201 glTexSubImage2D(face, level, x, y, wd, ht, comp, type, data);
203 if(auto_gen_mipmap && level==0)
207 glBindTexture(target, 0);
210 void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, PixelComponents comp, DataType type, const void *data)
212 if(comp!=get_components(format) || type!=get_component_type(format))
213 throw incompatible_data("TextureCube::subimage");
214 sub_image(face, level, x, y, wd, ht, data);
217 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img)
219 unsigned w = img.get_width();
220 unsigned h = img.get_height();
222 throw incompatible_data("TextureCube::image");
224 PixelFormat fmt = pixelformat_from_image(img);
225 storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w);
227 image(face, 0, img.get_pixels());
230 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img, bool)
235 void TextureCube::image(const Graphics::Image &img, unsigned lv)
237 unsigned w = img.get_width();
238 unsigned h = img.get_height();
241 throw incompatible_data("TextureCube::image");
244 PixelFormat fmt = pixelformat_from_image(img);
246 storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, lv);
247 else if(w!=size || h!=size)
248 throw incompatible_data("TextureCube::image");
250 const char *pixels = reinterpret_cast<const char *>(img.get_pixels());
251 unsigned face_size = img.get_stride()*size;
252 for(unsigned i=0; i<6; ++i)
253 image(enumerate_faces(i), 0, pixels+i*face_size);
256 unsigned TextureCube::get_n_levels() const
259 for(unsigned s=size; s; s>>=1, ++n) ;
263 unsigned TextureCube::get_level_size(unsigned level) const
268 TextureCubeFace TextureCube::enumerate_faces(unsigned i)
271 throw out_of_range("TextureCube::enumerate_faces");
272 return face_order[i];
275 unsigned TextureCube::get_face_index(TextureCubeFace face)
279 case POSITIVE_X: return 0;
280 case NEGATIVE_X: return 1;
281 case POSITIVE_Y: return 2;
282 case NEGATIVE_Y: return 3;
283 case POSITIVE_Z: return 4;
284 case NEGATIVE_Z: return 5;
285 default: throw invalid_argument("TextureCube::get_face_index");
289 const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
291 return directions[get_face_index(face)];
294 const Vector3 &TextureCube::get_s_direction(TextureCubeFace face)
296 return directions[orientations[get_face_index(face)*2]];
299 const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
301 return directions[orientations[get_face_index(face)*2+1]];
304 Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)
306 float s = (u+0.5f)*2.0f/size-1.0f;
307 float t = (v+0.5f)*2.0f/size-1.0f;
308 const Vector3 &fv = get_face_direction(face);
309 const Vector3 &sv = get_s_direction(face);
310 const Vector3 &tv = get_t_direction(face);
314 UInt64 TextureCube::get_data_size() const
316 return id ? size*size*6*get_pixel_size(storage_fmt) : 0;
320 TextureCube::Loader::Loader(TextureCube &t):
321 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
326 TextureCube::Loader::Loader(TextureCube &t, Collection &c):
327 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t, c)
332 void TextureCube::Loader::init()
334 add("external_image", &Loader::external_image);
335 add("image_data", &Loader::image_data);
336 add("raw_data", &Loader::raw_data);
337 add("storage", &Loader::storage);
338 add("storage", &Loader::storage_levels);
341 void TextureCube::Loader::external_image(TextureCubeFace face, const string &fn)
344 RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
347 obj.image(face, img);
350 void TextureCube::Loader::image_data(TextureCubeFace face, const string &data)
353 IO::Memory mem(data.data(), data.size());
356 obj.image(face, img);
359 void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
361 obj.image(face, 0, data.data());
364 void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
369 void TextureCube::Loader::storage_levels(PixelFormat fmt, unsigned s, unsigned l)
371 obj.storage(fmt, s, l);
375 void operator>>(const LexicalConverter &conv, TextureCubeFace &face)
377 const string &str = conv.get();
378 if(str=="POSITIVE_X")
380 else if(str=="NEGATIVE_X")
382 else if(str=="POSITIVE_Y")
384 else if(str=="NEGATIVE_Y")
386 else if(str=="POSITIVE_Z")
388 else if(str=="NEGATIVE_Z")
391 throw lexical_error(format("conversion of '%s' to TextureCubeFace", str));