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)
57 throw invalid_operation("TextureCube::storage");
59 throw invalid_argument("TextureCube::storage");
61 set_internal_format(fmt);
65 void TextureCube::allocate(unsigned level)
67 if(allocated&(1<<level))
70 if(ARB_texture_storage)
72 BindRestore _bind(this);
73 unsigned n_levels = (is_mipmapped(min_filter) ? get_n_levels() : 1);
74 glTexStorage2D(target, n_levels, ifmt, size, size);
75 allocated |= (1<<n_levels)-1;
79 PixelFormat base_fmt = get_base_pixelformat(ifmt);
80 DataType type = get_alloc_type(base_fmt);
81 for(unsigned i=0; i<6; ++i)
82 image(enumerate_faces(i), level, base_fmt, type, 0);
86 void TextureCube::image(TextureCubeFace face, unsigned level, PixelFormat fmt, DataType type, const void *data)
89 throw invalid_operation("TextureCube::image");
91 unsigned s = get_level_size(level);
93 throw out_of_range("TextureCube::image");
95 if(ARB_texture_storage)
96 return sub_image(face, level, 0, 0, s, s, fmt, type, data);
98 BindRestore _bind(this);
99 glTexImage2D(face, level, ifmt, s, s, 0, get_upload_format(fmt), type, data);
101 // XXX Allocation should be tracked per-face, but we'll run out of bits
102 allocated |= 1<<level;
103 if(gen_mipmap && level==0)
105 // TODO Only do this once all faces are created
106 auto_generate_mipmap();
107 allocated |= (1<<get_n_levels())-1;
111 void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, PixelFormat fmt, DataType type, const void *data)
114 throw invalid_operation("TextureCube::sub_image");
116 BindRestore _bind(this);
119 glTexSubImage2D(face, level, x, y, wd, ht, get_upload_format(fmt), type, data);
121 if(gen_mipmap && level==0)
122 auto_generate_mipmap();
125 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img, bool srgb)
127 unsigned w = img.get_width();
128 unsigned h = img.get_height();
129 PixelFormat fmt = pixelformat_from_graphics(img.get_format());
133 throw incompatible_data("TextureCube::image");
135 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
137 else if(w!=size || h!=size)
138 throw incompatible_data("TextureCube::image");
140 PixelStore pstore = PixelStore::from_image(img);
141 BindRestore _bind_ps(pstore);
143 image(face, 0, fmt, UNSIGNED_BYTE, img.get_data());
146 void TextureCube::image(const Graphics::Image &img, bool srgb)
148 unsigned w = img.get_width();
149 unsigned h = img.get_height();
152 throw incompatible_data("TextureCube::image");
155 PixelFormat fmt = pixelformat_from_graphics(img.get_format());
157 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
158 else if(w!=size || h!=size)
159 throw incompatible_data("TextureCube::image");
161 PixelStore pstore = PixelStore::from_image(img);
162 BindRestore _bind_ps(pstore);
164 const char *cdata = reinterpret_cast<const char *>(img.get_data());
165 unsigned face_size = img.get_stride()*size;
166 for(unsigned i=0; i<6; ++i)
167 image(enumerate_faces(i), 0, fmt, UNSIGNED_BYTE, cdata+i*face_size);
170 unsigned TextureCube::get_n_levels() const
173 for(unsigned s=size; s; s>>=1, ++n) ;
177 unsigned TextureCube::get_level_size(unsigned level) const
182 TextureCubeFace TextureCube::enumerate_faces(unsigned i)
185 throw out_of_range("TextureCube::enumerate_faces");
186 return face_order[i];
189 unsigned TextureCube::get_face_index(TextureCubeFace face)
193 case POSITIVE_X: return 0;
194 case NEGATIVE_X: return 1;
195 case POSITIVE_Y: return 2;
196 case NEGATIVE_Y: return 3;
197 case POSITIVE_Z: return 4;
198 case NEGATIVE_Z: return 5;
199 default: throw invalid_argument("TextureCube::get_face_index");
203 const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
205 return directions[get_face_index(face)];
208 const Vector3 &TextureCube::get_s_direction(TextureCubeFace face)
210 return directions[orientations[get_face_index(face)*2]];
213 const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
215 return directions[orientations[get_face_index(face)*2+1]];
218 Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)
220 float s = (u+0.5f)*2.0f/size-1.0f;
221 float t = (v+0.5f)*2.0f/size-1.0f;
222 const Vector3 &fv = get_face_direction(face);
223 const Vector3 &sv = get_s_direction(face);
224 const Vector3 &tv = get_t_direction(face);
228 UInt64 TextureCube::get_data_size() const
230 return id ? size*size*6*get_pixel_size(ifmt) : 0;
234 TextureCube::Loader::Loader(TextureCube &t):
235 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
240 TextureCube::Loader::Loader(TextureCube &t, Collection &c):
241 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t, c)
246 void TextureCube::Loader::init()
248 add("external_image", &Loader::external_image);
249 add("image_data", &Loader::image_data);
250 add("raw_data", &Loader::raw_data);
251 add("storage", &Loader::storage);
254 void TextureCube::Loader::external_image(TextureCubeFace face, const string &fn)
257 RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
260 obj.image(face, img, srgb);
263 void TextureCube::Loader::image_data(TextureCubeFace face, const string &data)
266 IO::Memory mem(data.data(), data.size());
269 obj.image(face, img, srgb);
272 void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
274 obj.image(face, 0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
277 void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
280 fmt = get_srgb_pixelformat(fmt);
285 void operator>>(const LexicalConverter &conv, TextureCubeFace &face)
287 const string &str = conv.get();
288 if(str=="POSITIVE_X")
290 else if(str=="NEGATIVE_X")
292 else if(str=="POSITIVE_Y")
294 else if(str=="NEGATIVE_Y")
296 else if(str=="POSITIVE_Z")
298 else if(str=="NEGATIVE_Z")
301 throw lexical_error(format("conversion of '%s' to TextureCubeFace", str));