dagon.graphics.cubemap source code

1 /*
2 Copyright (c) 2019-2023 Timur Gafarov
3 
4 Boost Software License - Version 1.0 - August 17th, 2003
5 Permission is hereby granted, free of charge, to any person or organization
6 obtaining a copy of the software and accompanying documentation covered by
7 this license (the "Software") to use, reproduce, display, distribute,
8 execute, and transmit the Software, and to prepare derivative works of the
9 Software, and to permit third-parties to whom the Software is furnished to
10 do so, all subject to the following:
11 
12 The copyright notices in the Software and this entire statement, including
13 the above license grant, this restriction and the following disclaimer,
14 must be included in all copies of the Software, in whole or in part, and
15 all derivative works of the Software, unless such copies or derivative
16 works are solely in the form of machine-executable object code generated by
17 a source language processor.
18 
19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
22 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
23 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
24 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25 DEALINGS IN THE SOFTWARE.
26 */
27 
28 deprecated("import dagon.graphics.texture instead") module dagon.graphics.cubemap;
29 
30 /*
31 class Cubemap: Texture
32 {
33     this(Owner o)
34     {
35         super(o);
36     }
37 
38     this(uint resolution, Owner o)
39     {
40         super(o);
41         initialize(resolution);
42     }
43 
44     ~this()
45     {
46         release();
47     }
48 
49     void initialize()
50     {
51         releaseGLTexture();
52 
53         glActiveTexture(GL_TEXTURE0);
54 
55         glGenTextures(1, &tex);
56         glBindTexture(GL_TEXTURE_CUBE_MAP, tex);
57 
58         glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
59         glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
60         glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
61         glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
62         glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
63 
64         glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
65     }
66 
67     void initialize(uint resolution)
68     {
69         initialize();
70 
71         width = resolution;
72         height = resolution;
73         
74         glBindTexture(GL_TEXTURE_CUBE_MAP, tex);
75 
76         glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, GL_RGBA16F, resolution, resolution, 0, GL_RGBA, GL_FLOAT, null);
77         glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, GL_RGBA16F, resolution, resolution, 0, GL_RGBA, GL_FLOAT, null);
78         glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, GL_RGBA16F, resolution, resolution, 0, GL_RGBA, GL_FLOAT, null);
79         glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, GL_RGBA16F, resolution, resolution, 0, GL_RGBA, GL_FLOAT, null);
80         glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, GL_RGBA16F, resolution, resolution, 0, GL_RGBA, GL_FLOAT, null);
81         glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, GL_RGBA16F, resolution, resolution, 0, GL_RGBA, GL_FLOAT, null);
82 
83         glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
84     }
85 
86     void setFaceImage(CubeFace face, SuperImage img)
87     {
88         if (img.width != img.height)
89         {
90             writefln("Cubemap face image must be square");
91             return;
92         }
93 
94         width = img.width;
95         height = img.height;
96         
97         TextureFormat tf;
98         if (detectTextureFormat(img, tf))
99         {
100             format = tf.format;
101             intFormat = tf.internalFormat;
102             type = tf.pixelType;
103             
104             glBindTexture(GL_TEXTURE_CUBE_MAP, tex);
105             if (tf.compressed)
106             {
107                 uint size = ((width + 3) / 4) * ((height + 3) / 4) * tf.blockSize;
108                 glCompressedTexImage2D(face, 0, intFormat, width, height, 0, size, cast(void*)img.data.ptr);
109             }
110             else
111             {
112                 glTexImage2D(face, 0, intFormat, width, height, 0, format, type, cast(void*)img.data.ptr);
113             }
114             glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
115         }
116         else
117         {
118             writefln("Unsupported pixel format %s", img.pixelFormat);
119         }
120     }
121     
122     void fromEquirectangularMap(Texture tex)
123     {
124         fromEquirectangularMap(tex.image);
125     }
126 
127     void fromEquirectangularMap(SuperImage envmap)
128     {
129         SuperImage faceImage = envmap.createSameFormat(width, width);
130 
131         foreach(i, face; EnumMembers!CubeFace)
132         {
133             Matrix4x4f dirTransform = cubeFaceMatrix(face);
134 
135             foreach(x; 0..width)
136             foreach(y; 0..width)
137             {
138                 float cubex = (cast(float)x / cast(float)width) * 2.0f - 1.0f;
139                 float cubey = (1.0f - cast(float)y / cast(float)width) * 2.0f - 1.0f;
140                 Vector3f dir = Vector3f(cubex, cubey, 1.0f).normalized * dirTransform;
141                 Vector2f uv = equirectProj(dir);
142                 Color4f c = bilinearPixel(envmap, uv.x * envmap.width, uv.y * envmap.height);
143                 faceImage[x, y] = c;
144             }
145 
146             setFaceImage(face, faceImage);
147         }
148 
149         faceImage.free();
150     }
151     
152     void fromContainerImage(ContainerImage img)
153     {
154         initialize();
155         
156         if (!img.isCubemap)
157         {
158             writefln("Image is not a cubemap");
159             return;
160         }
161         
162         TextureFormat tf;
163         if (!detectTextureFormat(img, tf))
164         {
165             writefln("Unsupported pixel format %s for a cubemap", img.pixelFormat);
166             return;
167         }
168         else if (tf.compressed)
169         {
170             writefln("Unsupported pixel format %s for a cubemap", img.pixelFormat);
171             return;
172         }
173         
174         width = img.width;
175         height = img.height;
176         numMipmapLevels = img.mipLevels;
177         
178         format = tf.format;
179         intFormat = tf.internalFormat;
180         type = tf.pixelType;
181         
182         uint pSize = pixelSize(img.pixelFormat);
183         
184         glBindTexture(GL_TEXTURE_CUBE_MAP, tex);
185         glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BASE_LEVEL, 0);
186         glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAX_LEVEL, numMipmapLevels - 1);
187         
188         ubyte* data = img.data.ptr;
189         uint offset = 0;
190         
191         foreach(face; EnumMembers!CubeFace)
192         {
193             uint w = width;
194             uint h = height;
195             for (uint i = 0; i < numMipmapLevels; i++)
196             {
197                 uint size = w * h * pSize;
198                 glTexImage2D(face, i, intFormat, w, h, 0, format, type, cast(void*)(data + offset));
199                 offset += size;
200                 w /= 2;
201                 h /= 2;
202                 if (offset >= img.data.length)
203                 {
204                     writeln("Incomplete data");
205                     break;
206                 }
207             }
208         }
209         
210         glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
211     }
212     
213     void fromImage(SuperImage img, uint resolution = 512)
214     {
215         ContainerImage cImage = cast(ContainerImage)img;
216         if (cImage)
217         {
218             fromContainerImage(cImage);
219         }
220         else
221         {
222             initialize(resolution);
223             fromEquirectangularMap(img);
224         }
225     }
226 
227     override void bind()
228     {
229         if (glIsTexture(tex))
230         {
231             glBindTexture(GL_TEXTURE_CUBE_MAP, tex);
232 
233             if (!mipmapGenerated && useMipmapFiltering)
234             {
235                 glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
236                 mipmapGenerated = true;
237             }
238         }
239     }
240 
241     override void unbind()
242     {
243         glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
244     }
245 
246     void invalidateMipmap()
247     {
248         mipmapGenerated = false;
249     }
250 }
251 
252 uint pixelSize(uint pixelFormat)
253 {
254     uint s = 0;
255     switch(pixelFormat)
256     {
257         case ContainerImageFormat.R8:      s = 1; break;
258         case ContainerImageFormat.RG8:     s = 2; break;
259         case ContainerImageFormat.RGB8:    s = 3; break;
260         case ContainerImageFormat.RGBA8:   s = 4; break;
261         case ContainerImageFormat.RGBAF32: s = 16; break;
262         case ContainerImageFormat.RGBAF16: s = 8; break;
263         default: break;
264     }
265     return s;
266 }
267 */
268