1 #include <msp/datafile/collection.h>
2 #include <msp/gl/extensions/arb_texture_cube_map.h>
3 #include <msp/gl/extensions/arb_texture_storage.h>
4 #include <msp/io/memory.h>
5 #include <msp/strings/format.h>
8 #include "pixelstore.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);
54 void TextureCube::storage(PixelFormat fmt, unsigned sz, unsigned lv)
58 if(fmt!=format || sz!=size || (lv && lv!=levels))
59 throw incompatible_data("TextureCube::storage");
63 throw invalid_argument("TextureCube::storage");
67 levels = get_n_levels();
69 levels = min(levels, lv);
72 void TextureCube::allocate(unsigned level)
75 throw invalid_operation("TextureCube::allocate");
77 throw invalid_argument("TextureCube::allocate");
78 if(allocated&(64<<level))
81 if(ARB_texture_storage)
83 BindRestore _bind(this);
84 glTexStorage2D(target, levels, storage_fmt, size, size);
86 allocated |= (64<<levels)-1;
90 for(unsigned i=0; i<6; ++i)
91 image(enumerate_faces(i), level, 0);
95 void TextureCube::image(TextureCubeFace face, unsigned level, const void *data)
98 throw invalid_operation("TextureCube::image");
100 unsigned s = get_level_size(level);
102 throw out_of_range("TextureCube::image");
104 if(ARB_texture_storage)
105 return sub_image(face, level, 0, 0, s, s, data);
107 BindRestore _bind(this);
111 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
115 PixelComponents comp = get_components(storage_fmt);
116 GLenum type = get_gl_type(get_component_type(storage_fmt));
117 glTexImage2D(face, level, storage_fmt, s, s, 0, comp, type, data);
121 allocated |= 1<<get_face_index(face);
122 if((allocated&63)==63)
128 allocated |= (64<<levels)-1;
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, storage_fmt, s, s, 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 BindRestore _bind(this);
157 PixelComponents comp = get_components(storage_fmt);
158 GLenum type = get_gl_type(get_component_type(storage_fmt));
159 glTexSubImage2D(face, level, x, y, wd, ht, comp, type, data);
161 if(auto_gen_mipmap && level==0)
165 void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, PixelComponents comp, DataType type, const void *data)
167 if(comp!=get_components(format) || type!=get_component_type(format))
168 throw incompatible_data("TextureCube::subimage");
169 sub_image(face, level, x, y, wd, ht, data);
172 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img)
174 unsigned w = img.get_width();
175 unsigned h = img.get_height();
177 throw incompatible_data("TextureCube::image");
179 PixelFormat fmt = pixelformat_from_image(img);
180 storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w);
182 PixelStore pstore = PixelStore::from_image(img);
183 BindRestore _bind_ps(pstore);
185 image(face, 0, img.get_pixels());
188 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img, bool)
193 void TextureCube::image(const Graphics::Image &img, unsigned lv)
195 unsigned w = img.get_width();
196 unsigned h = img.get_height();
199 throw incompatible_data("TextureCube::image");
202 PixelFormat fmt = pixelformat_from_image(img);
204 storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, lv);
205 else if(w!=size || h!=size)
206 throw incompatible_data("TextureCube::image");
208 PixelStore pstore = PixelStore::from_image(img);
209 BindRestore _bind_ps(pstore);
211 const char *pixels = reinterpret_cast<const char *>(img.get_pixels());
212 unsigned face_size = img.get_stride()*size;
213 for(unsigned i=0; i<6; ++i)
214 image(enumerate_faces(i), 0, pixels+i*face_size);
217 unsigned TextureCube::get_n_levels() const
220 for(unsigned s=size; s; s>>=1, ++n) ;
224 unsigned TextureCube::get_level_size(unsigned level) const
229 TextureCubeFace TextureCube::enumerate_faces(unsigned i)
232 throw out_of_range("TextureCube::enumerate_faces");
233 return face_order[i];
236 unsigned TextureCube::get_face_index(TextureCubeFace face)
240 case POSITIVE_X: return 0;
241 case NEGATIVE_X: return 1;
242 case POSITIVE_Y: return 2;
243 case NEGATIVE_Y: return 3;
244 case POSITIVE_Z: return 4;
245 case NEGATIVE_Z: return 5;
246 default: throw invalid_argument("TextureCube::get_face_index");
250 const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
252 return directions[get_face_index(face)];
255 const Vector3 &TextureCube::get_s_direction(TextureCubeFace face)
257 return directions[orientations[get_face_index(face)*2]];
260 const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
262 return directions[orientations[get_face_index(face)*2+1]];
265 Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)
267 float s = (u+0.5f)*2.0f/size-1.0f;
268 float t = (v+0.5f)*2.0f/size-1.0f;
269 const Vector3 &fv = get_face_direction(face);
270 const Vector3 &sv = get_s_direction(face);
271 const Vector3 &tv = get_t_direction(face);
275 UInt64 TextureCube::get_data_size() const
277 return id ? size*size*6*get_pixel_size(storage_fmt) : 0;
281 TextureCube::Loader::Loader(TextureCube &t):
282 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
287 TextureCube::Loader::Loader(TextureCube &t, Collection &c):
288 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t, c)
293 void TextureCube::Loader::init()
295 add("external_image", &Loader::external_image);
296 add("image_data", &Loader::image_data);
297 add("raw_data", &Loader::raw_data);
298 add("storage", &Loader::storage);
299 add("storage", &Loader::storage_levels);
302 void TextureCube::Loader::external_image(TextureCubeFace face, const string &fn)
305 RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
308 obj.image(face, img);
311 void TextureCube::Loader::image_data(TextureCubeFace face, const string &data)
314 IO::Memory mem(data.data(), data.size());
317 obj.image(face, img);
320 void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
322 obj.image(face, 0, data.data());
325 void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
330 void TextureCube::Loader::storage_levels(PixelFormat fmt, unsigned s, unsigned l)
332 obj.storage(fmt, s, l);
336 void operator>>(const LexicalConverter &conv, TextureCubeFace &face)
338 const string &str = conv.get();
339 if(str=="POSITIVE_X")
341 else if(str=="NEGATIVE_X")
343 else if(str=="POSITIVE_Y")
345 else if(str=="NEGATIVE_Y")
347 else if(str=="POSITIVE_Z")
349 else if(str=="NEGATIVE_Z")
352 throw lexical_error(format("conversion of '%s' to TextureCubeFace", str));