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)
57 throw invalid_operation("TextureCube::storage");
59 throw invalid_argument("TextureCube::storage");
61 set_internal_format(fmt);
63 levels = get_n_levels();
65 levels = min(levels, lv);
68 void TextureCube::allocate(unsigned level)
71 throw invalid_operation("TextureCube::allocate");
73 throw invalid_argument("TextureCube::allocate");
74 if(allocated&(1<<level))
77 if(ARB_texture_storage)
79 BindRestore _bind(this);
80 glTexStorage2D(target, levels, ifmt, size, size);
81 allocated |= (1<<levels)-1;
85 PixelFormat base_fmt = get_base_pixelformat(ifmt);
86 DataType type = get_alloc_type(base_fmt);
87 for(unsigned i=0; i<6; ++i)
88 image(enumerate_faces(i), level, base_fmt, type, 0);
92 void TextureCube::image(TextureCubeFace face, unsigned level, PixelFormat fmt, DataType type, const void *data)
95 throw invalid_operation("TextureCube::image");
97 unsigned s = get_level_size(level);
99 throw out_of_range("TextureCube::image");
101 if(ARB_texture_storage)
102 return sub_image(face, level, 0, 0, s, s, fmt, type, data);
104 BindRestore _bind(this);
105 glTexImage2D(face, level, ifmt, s, s, 0, get_upload_format(fmt), type, data);
107 // XXX Allocation should be tracked per-face, but we'll run out of bits
108 allocated |= 1<<level;
109 if(auto_gen_mipmap==1 && level==0)
111 // TODO Only do this once all faces are created
113 allocated |= (1<<get_n_levels())-1;
117 void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, PixelFormat fmt, DataType type, const void *data)
120 throw invalid_operation("TextureCube::sub_image");
122 BindRestore _bind(this);
125 glTexSubImage2D(face, level, x, y, wd, ht, get_upload_format(fmt), type, data);
127 if(auto_gen_mipmap==1 && level==0)
131 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img, bool srgb)
133 unsigned w = img.get_width();
134 unsigned h = img.get_height();
135 PixelFormat fmt = pixelformat_from_graphics(img.get_format());
139 throw incompatible_data("TextureCube::image");
141 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
143 else if(w!=size || h!=size)
144 throw incompatible_data("TextureCube::image");
146 PixelStore pstore = PixelStore::from_image(img);
147 BindRestore _bind_ps(pstore);
149 image(face, 0, fmt, UNSIGNED_BYTE, img.get_data());
152 void TextureCube::image(const Graphics::Image &img, bool srgb)
154 unsigned w = img.get_width();
155 unsigned h = img.get_height();
158 throw incompatible_data("TextureCube::image");
161 PixelFormat fmt = pixelformat_from_graphics(img.get_format());
164 unsigned l = (is_mipmapped(min_filter) ? mipmap_levels ? mipmap_levels : 0 : 1);
165 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w, l);
167 else if(w!=size || h!=size)
168 throw incompatible_data("TextureCube::image");
170 PixelStore pstore = PixelStore::from_image(img);
171 BindRestore _bind_ps(pstore);
173 const char *cdata = reinterpret_cast<const char *>(img.get_data());
174 unsigned face_size = img.get_stride()*size;
175 for(unsigned i=0; i<6; ++i)
176 image(enumerate_faces(i), 0, fmt, UNSIGNED_BYTE, cdata+i*face_size);
179 unsigned TextureCube::get_n_levels() const
182 for(unsigned s=size; s; s>>=1, ++n) ;
186 unsigned TextureCube::get_level_size(unsigned level) const
191 TextureCubeFace TextureCube::enumerate_faces(unsigned i)
194 throw out_of_range("TextureCube::enumerate_faces");
195 return face_order[i];
198 unsigned TextureCube::get_face_index(TextureCubeFace face)
202 case POSITIVE_X: return 0;
203 case NEGATIVE_X: return 1;
204 case POSITIVE_Y: return 2;
205 case NEGATIVE_Y: return 3;
206 case POSITIVE_Z: return 4;
207 case NEGATIVE_Z: return 5;
208 default: throw invalid_argument("TextureCube::get_face_index");
212 const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
214 return directions[get_face_index(face)];
217 const Vector3 &TextureCube::get_s_direction(TextureCubeFace face)
219 return directions[orientations[get_face_index(face)*2]];
222 const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
224 return directions[orientations[get_face_index(face)*2+1]];
227 Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)
229 float s = (u+0.5f)*2.0f/size-1.0f;
230 float t = (v+0.5f)*2.0f/size-1.0f;
231 const Vector3 &fv = get_face_direction(face);
232 const Vector3 &sv = get_s_direction(face);
233 const Vector3 &tv = get_t_direction(face);
237 UInt64 TextureCube::get_data_size() const
239 return id ? size*size*6*get_pixel_size(ifmt) : 0;
243 TextureCube::Loader::Loader(TextureCube &t):
244 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
249 TextureCube::Loader::Loader(TextureCube &t, Collection &c):
250 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t, c)
255 void TextureCube::Loader::init()
257 add("external_image", &Loader::external_image);
258 add("image_data", &Loader::image_data);
259 add("raw_data", &Loader::raw_data);
260 add("storage", &Loader::storage);
263 void TextureCube::Loader::external_image(TextureCubeFace face, const string &fn)
266 RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
269 obj.image(face, img, srgb);
272 void TextureCube::Loader::image_data(TextureCubeFace face, const string &data)
275 IO::Memory mem(data.data(), data.size());
278 obj.image(face, img, srgb);
281 void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
283 obj.image(face, 0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
286 void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
292 void operator>>(const LexicalConverter &conv, TextureCubeFace &face)
294 const string &str = conv.get();
295 if(str=="POSITIVE_X")
297 else if(str=="NEGATIVE_X")
299 else if(str=="POSITIVE_Y")
301 else if(str=="NEGATIVE_Y")
303 else if(str=="POSITIVE_Z")
305 else if(str=="NEGATIVE_Z")
308 throw lexical_error(format("conversion of '%s' to TextureCubeFace", str));