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");
40 require_pixelformat(fmt);
46 void TextureCube::allocate(unsigned level)
48 if(allocated&(1<<level))
51 PixelFormat base_fmt = get_base_pixelformat(ifmt);
52 DataType type = get_alloc_type(base_fmt);
53 for(unsigned i=0; i<6; ++i)
54 image(enumerate_faces(i), level, base_fmt, type, 0);
57 void TextureCube::image(TextureCubeFace face, unsigned level, PixelFormat fmt, DataType type, const void *data)
60 throw invalid_operation("TextureCube::image");
62 unsigned s = get_level_size(level);
64 throw out_of_range("TextureCube::image");
66 BindRestore _bind(this);
67 glTexImage2D(face, level, ifmt, s, s, 0, fmt, type, data);
69 // XXX Allocation should be tracked per-face, but we'll run out of bits
70 allocated |= 1<<level;
71 if(gen_mipmap && level==0)
73 // TODO Only do this once all faces are created
74 auto_generate_mipmap();
75 for(; s; s>>=1, ++level) ;
76 allocated |= (1<<level)-1;
80 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img, bool srgb)
82 unsigned w = img.get_width();
83 unsigned h = img.get_height();
84 PixelFormat fmt = pixelformat_from_graphics(img.get_format());
88 throw incompatible_data("TextureCube::image");
90 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
92 else if(w!=size || h!=size)
93 throw incompatible_data("TextureCube::image");
95 PixelStore pstore = PixelStore::from_image(img);
96 BindRestore _bind_ps(pstore);
98 image(face, 0, fmt, UNSIGNED_BYTE, img.get_data());
101 void TextureCube::image(const Graphics::Image &img, bool srgb)
103 unsigned w = img.get_width();
104 unsigned h = img.get_height();
107 throw incompatible_data("TextureCube::image");
110 PixelFormat fmt = pixelformat_from_graphics(img.get_format());
112 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
113 else if(w!=size || h!=size)
114 throw incompatible_data("TextureCube::image");
116 PixelStore pstore = PixelStore::from_image(img);
117 BindRestore _bind_ps(pstore);
119 const char *cdata = reinterpret_cast<const char *>(img.get_data());
120 unsigned face_size = img.get_stride()*size;
121 for(unsigned i=0; i<6; ++i)
122 image(enumerate_faces(i), 0, fmt, UNSIGNED_BYTE, cdata+i*face_size);
125 unsigned TextureCube::get_level_size(unsigned level)
130 TextureCubeFace TextureCube::enumerate_faces(unsigned i)
134 case 0: return POSITIVE_X;
135 case 1: return NEGATIVE_X;
136 case 2: return POSITIVE_Y;
137 case 3: return NEGATIVE_Y;
138 case 4: return POSITIVE_Z;
139 case 5: return NEGATIVE_Z;
140 default: throw out_of_range("TextureCube::enumerate_faces");
144 const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
148 case POSITIVE_X: return directions[0];
149 case NEGATIVE_X: return directions[1];
150 case POSITIVE_Y: return directions[2];
151 case NEGATIVE_Y: return directions[3];
152 case POSITIVE_Z: return directions[4];
153 case NEGATIVE_Z: return directions[5];
154 default: throw invalid_argument("TextureCube::get_face_direction");
158 const Vector3 &TextureCube::get_s_direction(TextureCubeFace face)
162 case POSITIVE_X: return directions[5];
163 case NEGATIVE_X: return directions[4];
164 case POSITIVE_Y: return directions[0];
165 case NEGATIVE_Y: return directions[0];
166 case POSITIVE_Z: return directions[0];
167 case NEGATIVE_Z: return directions[1];
168 default: throw invalid_argument("TextureCube::get_s_direction");
172 const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
176 case POSITIVE_X: return directions[3];
177 case NEGATIVE_X: return directions[3];
178 case POSITIVE_Y: return directions[4];
179 case NEGATIVE_Y: return directions[5];
180 case POSITIVE_Z: return directions[3];
181 case NEGATIVE_Z: return directions[3];
182 default: throw invalid_argument("TextureCube::get_t_direction");
186 Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)
188 float s = (u+0.5f)*2.0f/size-1.0f;
189 float t = (v+0.5f)*2.0f/size-1.0f;
190 const Vector3 &fv = get_face_direction(face);
191 const Vector3 &sv = get_s_direction(face);
192 const Vector3 &tv = get_t_direction(face);
196 UInt64 TextureCube::get_data_size() const
198 return id ? size*size*6*get_pixel_size(ifmt) : 0;
202 TextureCube::Loader::Loader(TextureCube &t):
203 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
208 TextureCube::Loader::Loader(TextureCube &t, Collection &c):
209 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t, c)
214 void TextureCube::Loader::init()
216 add("external_image", &Loader::external_image);
217 add("image_data", &Loader::image_data);
218 add("raw_data", &Loader::raw_data);
219 add("storage", &Loader::storage);
222 void TextureCube::Loader::external_image(TextureCubeFace face, const string &fn)
225 RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
228 obj.image(face, img, srgb);
231 void TextureCube::Loader::image_data(TextureCubeFace face, const string &data)
234 IO::Memory mem(data.data(), data.size());
237 obj.image(face, img, srgb);
240 void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
242 obj.image(face, 0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
245 void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
248 fmt = get_srgb_pixelformat(fmt);
253 void operator>>(const LexicalConverter &conv, TextureCubeFace &face)
255 const string &str = conv.get();
256 if(str=="POSITIVE_X")
258 else if(str=="NEGATIVE_X")
260 else if(str=="POSITIVE_Y")
262 else if(str=="NEGATIVE_Y")
264 else if(str=="POSITIVE_Z")
266 else if(str=="NEGATIVE_Z")
269 throw lexical_error(format("conversion of '%s' to TextureCubeFace", str));