1 #include <msp/gl/extensions/arb_texture_cube_map.h>
2 #include <msp/io/memory.h>
3 #include <msp/strings/format.h>
6 #include "pixelstore.h"
7 #include "texturecube.h"
14 Vector3 TextureCube::directions[6] =
24 TextureCube::TextureCube():
25 Texture(GL_TEXTURE_CUBE_MAP),
29 static Require _req(ARB_texture_cube_map);
32 void TextureCube::storage(PixelFormat fmt, unsigned sz)
35 throw invalid_operation("TextureCube::storage");
37 throw invalid_argument("TextureCube::storage");
38 require_pixelformat(fmt);
44 void TextureCube::allocate(unsigned level)
46 if(allocated&(1<<level))
49 for(unsigned i=0; i<6; ++i)
50 image(enumerate_faces(i), level, get_base_pixelformat(ifmt), UNSIGNED_BYTE, 0);
53 void TextureCube::image(TextureCubeFace face, unsigned level, PixelFormat fmt, DataType type, const void *data)
56 throw invalid_operation("TextureCube::image");
58 unsigned s = get_level_size(level);
60 throw out_of_range("TextureCube::image");
62 Bind _bind(this, true);
63 glTexImage2D(face, level, ifmt, s, s, 0, fmt, type, data);
65 // XXX Allocation should be tracked per-face, but we'll run out of bits
66 allocated |= 1<<level;
67 if(gen_mipmap && level==0)
69 for(; s; s>>=1, ++level) ;
70 allocated |= (1<<level)-1;
74 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img)
76 unsigned w = img.get_width();
77 unsigned h = img.get_height();
78 PixelFormat fmt = pixelformat_from_graphics(img.get_format());
82 storage(storage_pixelformat_from_graphics(img.get_format()), w);
84 throw incompatible_data("TextureCube::image");
86 else if(w!=size || h!=size)
87 throw incompatible_data("TextureCube::image");
89 PixelStore pstore = PixelStore::from_image(img);
90 Bind _bind_ps(pstore, true);
92 image(face, 0, fmt, UNSIGNED_BYTE, img.get_data());
95 unsigned TextureCube::get_level_size(unsigned level)
100 TextureCubeFace TextureCube::enumerate_faces(unsigned i)
104 case 0: return POSITIVE_X;
105 case 1: return NEGATIVE_X;
106 case 2: return POSITIVE_Y;
107 case 3: return NEGATIVE_Y;
108 case 4: return POSITIVE_Z;
109 case 5: return NEGATIVE_Z;
110 default: throw out_of_range("TextureCube::enumerate_faces");
114 const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
118 case POSITIVE_X: return directions[0];
119 case NEGATIVE_X: return directions[1];
120 case POSITIVE_Y: return directions[2];
121 case NEGATIVE_Y: return directions[3];
122 case POSITIVE_Z: return directions[4];
123 case NEGATIVE_Z: return directions[5];
124 default: throw invalid_argument("TextureCube::get_face_direction");
128 const Vector3 &TextureCube::get_s_direction(TextureCubeFace face)
132 case POSITIVE_X: return directions[5];
133 case NEGATIVE_X: return directions[4];
134 case POSITIVE_Y: return directions[0];
135 case NEGATIVE_Y: return directions[0];
136 case POSITIVE_Z: return directions[0];
137 case NEGATIVE_Z: return directions[1];
138 default: throw invalid_argument("TextureCube::get_s_direction");
142 const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
146 case POSITIVE_X: return directions[3];
147 case NEGATIVE_X: return directions[3];
148 case POSITIVE_Y: return directions[4];
149 case NEGATIVE_Y: return directions[5];
150 case POSITIVE_Z: return directions[3];
151 case NEGATIVE_Z: return directions[3];
152 default: throw invalid_argument("TextureCube::get_t_direction");
156 Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)
158 float s = (u+0.5f)*2.0f/size-1.0f;
159 float t = (v+0.5f)*2.0f/size-1.0f;
160 const Vector3 &fv = get_face_direction(face);
161 const Vector3 &sv = get_s_direction(face);
162 const Vector3 &tv = get_t_direction(face);
167 TextureCube::Loader::Loader(TextureCube &t):
168 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
170 add("image_data", &Loader::image_data);
171 add("raw_data", &Loader::raw_data);
172 add("storage", &Loader::storage);
175 void TextureCube::Loader::image_data(TextureCubeFace face, const string &data)
178 IO::Memory mem(data.data(), data.size());
181 obj.image(face, img);
184 void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
186 obj.image(face, 0, obj.ifmt, UNSIGNED_BYTE, data.data());
189 void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
195 void operator>>(const LexicalConverter &conv, TextureCubeFace &face)
197 const string &str = conv.get();
198 if(str=="POSITIVE_X")
200 else if(str=="NEGATIVE_X")
202 else if(str=="POSITIVE_Y")
204 else if(str=="NEGATIVE_Y")
206 else if(str=="POSITIVE_Z")
208 else if(str=="NEGATIVE_Z")
211 throw lexical_error(format("conversion of '%s' to TextureCubeFace", str));