1 #include <msp/datafile/collection.h>
2 #include <msp/gl/extensions/arb_texture_cube_map.h>
3 #include <msp/io/memory.h>
4 #include <msp/strings/format.h>
7 #include "pixelstore.h"
8 #include "texturecube.h"
15 Vector3 TextureCube::directions[6] =
25 TextureCube::TextureCube():
26 Texture(GL_TEXTURE_CUBE_MAP),
31 static Require _req(ARB_texture_cube_map);
34 void TextureCube::storage(PixelFormat fmt, unsigned sz)
37 throw invalid_operation("TextureCube::storage");
39 throw invalid_argument("TextureCube::storage");
41 if(MSP_sized_internal_formats)
42 fmt = get_sized_pixelformat(fmt);
43 require_pixelformat(fmt);
49 void TextureCube::allocate(unsigned level)
51 if(allocated&(1<<level))
54 PixelFormat base_fmt = get_base_pixelformat(ifmt);
55 DataType type = get_alloc_type(base_fmt);
56 for(unsigned i=0; i<6; ++i)
57 image(enumerate_faces(i), level, base_fmt, type, 0);
60 void TextureCube::image(TextureCubeFace face, unsigned level, PixelFormat fmt, DataType type, const void *data)
63 throw invalid_operation("TextureCube::image");
65 unsigned s = get_level_size(level);
67 throw out_of_range("TextureCube::image");
69 BindRestore _bind(this);
70 glTexImage2D(face, level, ifmt, s, s, 0, fmt, type, data);
72 // XXX Allocation should be tracked per-face, but we'll run out of bits
73 allocated |= 1<<level;
74 if(gen_mipmap && level==0)
76 // TODO Only do this once all faces are created
77 auto_generate_mipmap();
78 allocated |= (1<<get_n_levels())-1;
82 void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, PixelFormat fmt, DataType type, const void *data)
85 throw invalid_operation("TextureCube::sub_image");
89 BindRestore _bind(this);
90 glTexSubImage2D(face, level, x, y, wd, ht, fmt, type, data);
93 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img, bool srgb)
95 unsigned w = img.get_width();
96 unsigned h = img.get_height();
97 PixelFormat fmt = pixelformat_from_graphics(img.get_format());
101 throw incompatible_data("TextureCube::image");
103 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
105 else if(w!=size || h!=size)
106 throw incompatible_data("TextureCube::image");
108 PixelStore pstore = PixelStore::from_image(img);
109 BindRestore _bind_ps(pstore);
111 image(face, 0, fmt, UNSIGNED_BYTE, img.get_data());
114 void TextureCube::image(const Graphics::Image &img, bool srgb)
116 unsigned w = img.get_width();
117 unsigned h = img.get_height();
120 throw incompatible_data("TextureCube::image");
123 PixelFormat fmt = pixelformat_from_graphics(img.get_format());
125 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
126 else if(w!=size || h!=size)
127 throw incompatible_data("TextureCube::image");
129 PixelStore pstore = PixelStore::from_image(img);
130 BindRestore _bind_ps(pstore);
132 const char *cdata = reinterpret_cast<const char *>(img.get_data());
133 unsigned face_size = img.get_stride()*size;
134 for(unsigned i=0; i<6; ++i)
135 image(enumerate_faces(i), 0, fmt, UNSIGNED_BYTE, cdata+i*face_size);
138 unsigned TextureCube::get_n_levels() const
141 for(unsigned s=size; s; s>>=1, ++n) ;
145 unsigned TextureCube::get_level_size(unsigned level) const
150 TextureCubeFace TextureCube::enumerate_faces(unsigned i)
154 case 0: return POSITIVE_X;
155 case 1: return NEGATIVE_X;
156 case 2: return POSITIVE_Y;
157 case 3: return NEGATIVE_Y;
158 case 4: return POSITIVE_Z;
159 case 5: return NEGATIVE_Z;
160 default: throw out_of_range("TextureCube::enumerate_faces");
164 const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
168 case POSITIVE_X: return directions[0];
169 case NEGATIVE_X: return directions[1];
170 case POSITIVE_Y: return directions[2];
171 case NEGATIVE_Y: return directions[3];
172 case POSITIVE_Z: return directions[4];
173 case NEGATIVE_Z: return directions[5];
174 default: throw invalid_argument("TextureCube::get_face_direction");
178 const Vector3 &TextureCube::get_s_direction(TextureCubeFace face)
182 case POSITIVE_X: return directions[5];
183 case NEGATIVE_X: return directions[4];
184 case POSITIVE_Y: return directions[0];
185 case NEGATIVE_Y: return directions[0];
186 case POSITIVE_Z: return directions[0];
187 case NEGATIVE_Z: return directions[1];
188 default: throw invalid_argument("TextureCube::get_s_direction");
192 const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
196 case POSITIVE_X: return directions[3];
197 case NEGATIVE_X: return directions[3];
198 case POSITIVE_Y: return directions[4];
199 case NEGATIVE_Y: return directions[5];
200 case POSITIVE_Z: return directions[3];
201 case NEGATIVE_Z: return directions[3];
202 default: throw invalid_argument("TextureCube::get_t_direction");
206 Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)
208 float s = (u+0.5f)*2.0f/size-1.0f;
209 float t = (v+0.5f)*2.0f/size-1.0f;
210 const Vector3 &fv = get_face_direction(face);
211 const Vector3 &sv = get_s_direction(face);
212 const Vector3 &tv = get_t_direction(face);
216 UInt64 TextureCube::get_data_size() const
218 return id ? size*size*6*get_pixel_size(ifmt) : 0;
222 TextureCube::Loader::Loader(TextureCube &t):
223 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
228 TextureCube::Loader::Loader(TextureCube &t, Collection &c):
229 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t, c)
234 void TextureCube::Loader::init()
236 add("external_image", &Loader::external_image);
237 add("image_data", &Loader::image_data);
238 add("raw_data", &Loader::raw_data);
239 add("storage", &Loader::storage);
242 void TextureCube::Loader::external_image(TextureCubeFace face, const string &fn)
245 RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
248 obj.image(face, img, srgb);
251 void TextureCube::Loader::image_data(TextureCubeFace face, const string &data)
254 IO::Memory mem(data.data(), data.size());
257 obj.image(face, img, srgb);
260 void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
262 obj.image(face, 0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
265 void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
268 fmt = get_srgb_pixelformat(fmt);
273 void operator>>(const LexicalConverter &conv, TextureCubeFace &face)
275 const string &str = conv.get();
276 if(str=="POSITIVE_X")
278 else if(str=="NEGATIVE_X")
280 else if(str=="POSITIVE_Y")
282 else if(str=="NEGATIVE_Y")
284 else if(str=="POSITIVE_Z")
286 else if(str=="NEGATIVE_Z")
289 throw lexical_error(format("conversion of '%s' to TextureCubeFace", str));