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Make buffer storage immutable and use ARB_buffer_storage
[libs/gl.git] / source / texture3d.cpp
1 #include <cmath>
2 #include <msp/core/raii.h>
3 #include <msp/gl/extensions/arb_direct_state_access.h>
4 #include <msp/gl/extensions/arb_texture_storage.h>
5 #include <msp/gl/extensions/ext_texture3d.h>
6 #include <msp/gl/extensions/ext_texture_array.h>
7 #include <msp/graphics/image.h>
8 #include "bindable.h"
9 #include "error.h"
10 #include "pixelstore.h"
11 #include "texture3d.h"
12
13 using namespace std;
14
15 namespace Msp {
16 namespace GL {
17
18 Texture3D::Texture3D(GLenum t):
19         Texture(t),
20         width(0),
21         height(0),
22         depth(0),
23         allocated(0)
24 { }
25
26 Texture3D::Texture3D():
27         Texture(GL_TEXTURE_3D),
28         width(0),
29         height(0),
30         depth(0),
31         allocated(0)
32 {
33         static Require _req(EXT_texture3D);
34 }
35
36 void Texture3D::storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned dp, unsigned lv)
37 {
38         if(width>0)
39                 throw invalid_operation("Texture3D::storage");
40         if(wd==0 || ht==0 || dp==0)
41                 throw invalid_argument("Texture3D::storage");
42
43         set_internal_format(fmt);
44         width = wd;
45         height = ht;
46         depth = dp;
47         levels = get_n_levels();
48         if(lv>0)
49                 levels = min(levels, lv);
50 }
51
52 void Texture3D::allocate(unsigned level)
53 {
54         if(width==0 || height==0 || depth==0)
55                 throw invalid_operation("Texture3D::allocate");
56         if(level>=levels)
57                 throw invalid_argument("Texture3D::allocate");
58         if(allocated&(1<<level))
59                 return;
60
61         if(ARB_texture_storage)
62         {
63                 if(ARB_direct_state_access)
64                         glTextureStorage3D(id, levels, ifmt, width, height, depth);
65                 else
66                 {
67                         BindRestore _bind(this);
68                         glTexStorage3D(target, levels, ifmt, width, height, depth);
69                 }
70                 allocated |= (1<<levels)-1;
71         }
72         else
73         {
74                 PixelFormat base_fmt = get_base_pixelformat(ifmt);
75                 image(level, base_fmt, get_alloc_type(base_fmt), 0);
76         }
77 }
78
79 void Texture3D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
80 {
81         if(width==0 || height==0 || depth==0)
82                 throw invalid_operation("Texture3D::image");
83
84         unsigned w = width;
85         unsigned h = height;
86         unsigned d = depth;
87         get_level_size(level, w, h, d);
88
89         if(ARB_texture_storage)
90                 return sub_image(level, 0, 0, 0, w, h, d, fmt, type, data);
91
92         BindRestore _bind(this);
93         glTexImage3D(target, level, ifmt, width, height, depth, 0, get_upload_format(fmt), type, data);
94
95         allocated |= 1<<level;
96         if(auto_gen_mipmap && level==0)
97         {
98                 generate_mipmap();
99                 allocated |= (1<<get_n_levels())-1;
100         }
101 }
102
103 void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, PixelFormat fmt, DataType type, const void *data)
104 {
105         if(width==0 || height==0 || depth==0)
106                 throw invalid_operation("Texture3D::image");
107
108         Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
109         allocate(level);
110
111         fmt = get_upload_format(fmt);
112         if(ARB_direct_state_access)
113                 glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, fmt, type, data);
114         else
115                 glTexSubImage3D(target, level, x, y, z, wd, ht, dp, fmt, type, data);
116
117         if(auto_gen_mipmap && level==0)
118                 generate_mipmap();
119 }
120
121 void Texture3D::load_image(const string &fn, int dp)
122 {
123         Graphics::Image img;
124         img.load_file(fn);
125
126         unsigned w = img.get_width();
127         unsigned h = img.get_height();
128         unsigned d = 1;
129
130         if(dp==-1)
131         {
132                 if(h%w)
133                         throw incompatible_data("Texture3D::load_image");
134                 d = h/w;
135                 h = w;
136         }
137         else if(dp==-2)
138         {
139                 for(d=h; d*d>h; d>>=2) ;
140                 for(; d*d<h; ++d) ;
141                 if(d*d!=h)
142                         throw incompatible_data("Texture3D::load_image");
143                 h = d;
144         }
145         else if(dp>0)
146         {
147                 d = dp;
148                 if(h%d)
149                         throw incompatible_data("Texture3D::load_image");
150                 h /= d;
151         }
152         else
153                 throw invalid_argument("Texture3D::load_image");
154
155         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
156         if(width==0)
157                 storage(storage_pixelformat_from_graphics(img.get_format()), w, h, d);
158         else if(w!=width || h!=height || d!=depth)
159                 throw incompatible_data("Texture3D::load_image");
160
161         PixelStore pstore = PixelStore::from_image(img);
162         BindRestore _bind_ps(pstore);
163
164         image(0, fmt, UNSIGNED_BYTE, img.get_data());
165 }
166
167 void Texture3D::image(const Graphics::Image &img, bool srgb)
168 {
169         unsigned w = img.get_width();
170         unsigned h = img.get_height();
171         unsigned d = 1;
172
173         if(depth)
174         {
175                 if(h%depth)
176                         throw incompatible_data("Texture3D::load_image");
177                 h /= depth;
178                 d = depth;
179         }
180         else
181         {
182                 if(h%w)
183                         throw incompatible_data("Texture3D::load_image");
184                 d = h/w;
185                 h = w;
186         }
187
188         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
189         if(width==0)
190         {
191                 unsigned l = (is_mipmapped(min_filter) ? mipmap_levels ? mipmap_levels : 0 : 1);
192                 storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w, h, d, l);
193         }
194         else if(w!=width || h!=height || d!=depth)
195                 throw incompatible_data("Texture3D::load_image");
196
197         PixelStore pstore = PixelStore::from_image(img);
198         BindRestore _bind_ps(pstore);
199
200         image(0, fmt, UNSIGNED_BYTE, img.get_data());
201 }
202
203 unsigned Texture3D::get_n_levels() const
204 {
205         unsigned s = max(width, height);
206         if(target!=GL_TEXTURE_2D_ARRAY)
207                 s = max(s, depth);
208         unsigned n = 0;
209         for(; s; s>>=1, ++n) ;
210         return n;
211 }
212
213 void Texture3D::get_level_size(unsigned level, unsigned &w, unsigned &h, unsigned &d) const
214 {
215         w >>= level;
216         h >>= level;
217         if(target!=GL_TEXTURE_2D_ARRAY)
218                 d >>= level;
219
220         if(!w && (h || d))
221                 w = 1;
222         if(!h && (w || d))
223                 h = 1;
224         if(!d && (w || h))
225                 d = 1;
226 }
227
228 UInt64 Texture3D::get_data_size() const
229 {
230         return id ? width*height*depth*get_pixel_size(ifmt) : 0;
231 }
232
233
234 Texture3D::Loader::Loader(Texture3D &t):
235         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
236 {
237         init();
238 }
239
240 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
241         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
242 {
243         init();
244 }
245
246 void Texture3D::Loader::init()
247 {
248         add("raw_data", &Loader::raw_data);
249         add("storage", &Loader::storage);
250 }
251
252 void Texture3D::Loader::raw_data(const string &data)
253 {
254         obj.image(0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
255 }
256
257 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
258 {
259         obj.storage(fmt, w, h, d);
260 }
261
262 } // namespace GL
263 } // namespace Msp