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),
52 static Require _req(ARB_texture_cube_map);
55 void TextureCube::storage(PixelFormat fmt, unsigned sz)
58 throw invalid_operation("TextureCube::storage");
60 throw invalid_argument("TextureCube::storage");
62 if(MSP_sized_internal_formats)
63 fmt = get_sized_pixelformat(fmt);
64 require_pixelformat(fmt);
70 void TextureCube::allocate(unsigned level)
72 if(allocated&(1<<level))
75 if(ARB_texture_storage)
77 BindRestore _bind(this);
78 unsigned n_levels = (is_mipmapped(min_filter) ? get_n_levels() : 1);
79 glTexStorage2D(target, n_levels, ifmt, size, size);
80 allocated |= (1<<n_levels)-1;
84 PixelFormat base_fmt = get_base_pixelformat(ifmt);
85 DataType type = get_alloc_type(base_fmt);
86 for(unsigned i=0; i<6; ++i)
87 image(enumerate_faces(i), level, base_fmt, type, 0);
91 void TextureCube::image(TextureCubeFace face, unsigned level, PixelFormat fmt, DataType type, const void *data)
94 throw invalid_operation("TextureCube::image");
96 unsigned s = get_level_size(level);
98 throw out_of_range("TextureCube::image");
100 if(ARB_texture_storage)
101 return sub_image(face, level, 0, 0, s, s, fmt, type, data);
103 BindRestore _bind(this);
104 glTexImage2D(face, level, ifmt, s, s, 0, fmt, type, data);
106 // XXX Allocation should be tracked per-face, but we'll run out of bits
107 allocated |= 1<<level;
108 if(gen_mipmap && level==0)
110 // TODO Only do this once all faces are created
111 auto_generate_mipmap();
112 allocated |= (1<<get_n_levels())-1;
116 void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, PixelFormat fmt, DataType type, const void *data)
119 throw invalid_operation("TextureCube::sub_image");
121 BindRestore _bind(this);
124 glTexSubImage2D(face, level, x, y, wd, ht, fmt, type, data);
126 if(gen_mipmap && level==0)
127 auto_generate_mipmap();
130 void TextureCube::image(TextureCubeFace face, const Graphics::Image &img, bool srgb)
132 unsigned w = img.get_width();
133 unsigned h = img.get_height();
134 PixelFormat fmt = pixelformat_from_graphics(img.get_format());
138 throw incompatible_data("TextureCube::image");
140 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
142 else if(w!=size || h!=size)
143 throw incompatible_data("TextureCube::image");
145 PixelStore pstore = PixelStore::from_image(img);
146 BindRestore _bind_ps(pstore);
148 image(face, 0, fmt, UNSIGNED_BYTE, img.get_data());
151 void TextureCube::image(const Graphics::Image &img, bool srgb)
153 unsigned w = img.get_width();
154 unsigned h = img.get_height();
157 throw incompatible_data("TextureCube::image");
160 PixelFormat fmt = pixelformat_from_graphics(img.get_format());
162 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
163 else if(w!=size || h!=size)
164 throw incompatible_data("TextureCube::image");
166 PixelStore pstore = PixelStore::from_image(img);
167 BindRestore _bind_ps(pstore);
169 const char *cdata = reinterpret_cast<const char *>(img.get_data());
170 unsigned face_size = img.get_stride()*size;
171 for(unsigned i=0; i<6; ++i)
172 image(enumerate_faces(i), 0, fmt, UNSIGNED_BYTE, cdata+i*face_size);
175 unsigned TextureCube::get_n_levels() const
178 for(unsigned s=size; s; s>>=1, ++n) ;
182 unsigned TextureCube::get_level_size(unsigned level) const
187 TextureCubeFace TextureCube::enumerate_faces(unsigned i)
190 throw out_of_range("TextureCube::enumerate_faces");
191 return face_order[i];
194 unsigned TextureCube::get_face_index(TextureCubeFace face)
198 case POSITIVE_X: return 0;
199 case NEGATIVE_X: return 1;
200 case POSITIVE_Y: return 2;
201 case NEGATIVE_Y: return 3;
202 case POSITIVE_Z: return 4;
203 case NEGATIVE_Z: return 5;
204 default: throw invalid_argument("TextureCube::get_face_index");
208 const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
210 return directions[get_face_index(face)];
213 const Vector3 &TextureCube::get_s_direction(TextureCubeFace face)
215 return directions[orientations[get_face_index(face)*2]];
218 const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
220 return directions[orientations[get_face_index(face)*2+1]];
223 Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)
225 float s = (u+0.5f)*2.0f/size-1.0f;
226 float t = (v+0.5f)*2.0f/size-1.0f;
227 const Vector3 &fv = get_face_direction(face);
228 const Vector3 &sv = get_s_direction(face);
229 const Vector3 &tv = get_t_direction(face);
233 UInt64 TextureCube::get_data_size() const
235 return id ? size*size*6*get_pixel_size(ifmt) : 0;
239 TextureCube::Loader::Loader(TextureCube &t):
240 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
245 TextureCube::Loader::Loader(TextureCube &t, Collection &c):
246 DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t, c)
251 void TextureCube::Loader::init()
253 add("external_image", &Loader::external_image);
254 add("image_data", &Loader::image_data);
255 add("raw_data", &Loader::raw_data);
256 add("storage", &Loader::storage);
259 void TextureCube::Loader::external_image(TextureCubeFace face, const string &fn)
262 RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
265 obj.image(face, img, srgb);
268 void TextureCube::Loader::image_data(TextureCubeFace face, const string &data)
271 IO::Memory mem(data.data(), data.size());
274 obj.image(face, img, srgb);
277 void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
279 obj.image(face, 0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
282 void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
285 fmt = get_srgb_pixelformat(fmt);
290 void operator>>(const LexicalConverter &conv, TextureCubeFace &face)
292 const string &str = conv.get();
293 if(str=="POSITIVE_X")
295 else if(str=="NEGATIVE_X")
297 else if(str=="POSITIVE_Y")
299 else if(str=="NEGATIVE_Y")
301 else if(str=="POSITIVE_Z")
303 else if(str=="NEGATIVE_Z")
306 throw lexical_error(format("conversion of '%s' to TextureCubeFace", str));