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1 | // Created by: Kirill GAVRILOV |
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2 | // Copyright (c) 2013-2014 OPEN CASCADE SAS |
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3 | // |
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4 | // This file is part of Open CASCADE Technology software library. |
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5 | // |
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6 | // This library is free software; you can redistribute it and/or modify it under |
7 | // the terms of the GNU Lesser General Public License version 2.1 as published |
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8 | // by the Free Software Foundation, with special exception defined in the file |
9 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
10 | // distribution for complete text of the license and disclaimer of any warranty. |
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11 | // |
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12 | // Alternatively, this file may be used under the terms of Open CASCADE |
13 | // commercial license or contractual agreement. |
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14 | |
15 | #ifndef _OpenGl_Texture_H__ |
16 | #define _OpenGl_Texture_H__ |
17 | |
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18 | #include <Graphic3d_CubeMap.hxx> |
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19 | #include <Graphic3d_Vec3.hxx> |
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20 | #include <OpenGl_TextureFormat.hxx> |
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21 | #include <OpenGl_NamedResource.hxx> |
22 | #include <OpenGl_Sampler.hxx> |
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23 | #include <Graphic3d_TextureUnit.hxx> |
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24 | #include <Graphic3d_TypeOfTexture.hxx> |
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25 | |
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26 | class Graphic3d_TextureParams; |
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27 | class Image_PixMap; |
28 | |
29 | //! Texture resource. |
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30 | class OpenGl_Texture : public OpenGl_NamedResource |
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31 | { |
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32 | DEFINE_STANDARD_RTTIEXT(OpenGl_Texture, OpenGl_NamedResource) |
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33 | public: |
34 | |
35 | //! Helpful constants |
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36 | static const unsigned int NO_TEXTURE = 0; |
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37 | |
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38 | //! Return pixel size of pixel format in bytes. |
39 | //! Note that this method considers that OpenGL natively supports this pixel format, |
40 | //! which might be not the case - in the latter case, actual pixel size might differ! |
41 | Standard_EXPORT static Standard_Size PixelSizeOfPixelFormat (Standard_Integer theInternalFormat); |
42 | |
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43 | public: |
44 | |
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45 | //! Create uninitialized texture. |
46 | Standard_EXPORT OpenGl_Texture (const TCollection_AsciiString& theResourceId = TCollection_AsciiString(), |
47 | const Handle(Graphic3d_TextureParams)& theParams = Handle(Graphic3d_TextureParams)()); |
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48 | |
49 | //! Destroy object. |
50 | Standard_EXPORT virtual ~OpenGl_Texture(); |
51 | |
52 | //! @return true if current object was initialized |
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53 | virtual bool IsValid() const { return myTextureId != NO_TEXTURE; } |
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54 | |
55 | //! @return target to which the texture is bound (GL_TEXTURE_1D, GL_TEXTURE_2D) |
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56 | unsigned int GetTarget() const { return myTarget; } |
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57 | |
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58 | //! @return texture width (0 LOD) |
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59 | GLsizei SizeX() const { return mySizeX; } |
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60 | |
61 | //! @return texture height (0 LOD) |
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62 | GLsizei SizeY() const { return mySizeY; } |
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63 | |
64 | //! @return texture ID |
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65 | unsigned int TextureId() const { return myTextureId; } |
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66 | |
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67 | //! @return texture format (not sized) |
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68 | unsigned int GetFormat() const { return myTextFormat; } |
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69 | |
70 | //! @return texture format (sized) |
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71 | Standard_Integer SizedFormat() const { return mySizedFormat; } |
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72 | |
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73 | //! Return true for GL_RED and GL_ALPHA formats. |
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74 | bool IsAlpha() const { return myIsAlpha; } |
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75 | |
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76 | //! Setup to interpret the format as Alpha by Shader Manager |
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77 | //! (should be GL_ALPHA within compatible context or GL_RED otherwise). |
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78 | void SetAlpha (const bool theValue) { myIsAlpha = theValue; } |
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79 | |
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80 | //! Return if 2D surface is defined top-down (TRUE) or bottom-up (FALSE). |
81 | //! Normally set from Image_PixMap::IsTopDown() within texture initialization. |
82 | bool IsTopDown() const { return myIsTopDown; } |
83 | |
84 | //! Set if 2D surface is defined top-down (TRUE) or bottom-up (FALSE). |
85 | void SetTopDown (bool theIsTopDown) { myIsTopDown = theIsTopDown; } |
86 | |
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87 | //! Creates Texture id if not yet generated. |
88 | //! Data should be initialized by another method. |
89 | Standard_EXPORT bool Create (const Handle(OpenGl_Context)& theCtx); |
90 | |
91 | //! Destroy object - will release GPU memory if any. |
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92 | Standard_EXPORT virtual void Release (OpenGl_Context* theCtx) Standard_OVERRIDE; |
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93 | |
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94 | //! Return texture sampler. |
95 | const Handle(OpenGl_Sampler)& Sampler() const { return mySampler; } |
96 | |
97 | //! Set texture sampler. |
98 | void SetSampler (const Handle(OpenGl_Sampler)& theSampler) { mySampler = theSampler; } |
99 | |
100 | //! Initialize the Sampler Object (as OpenGL object). |
101 | //! @param theCtx currently bound OpenGL context |
102 | Standard_EXPORT bool InitSamplerObject (const Handle(OpenGl_Context)& theCtx); |
103 | |
104 | //! Bind this Texture to the unit specified in sampler parameters. |
105 | //! Also binds Sampler Object if it is allocated. |
106 | void Bind (const Handle(OpenGl_Context)& theCtx) const |
107 | { |
108 | Bind (theCtx, mySampler->Parameters()->TextureUnit()); |
109 | } |
110 | |
111 | //! Unbind texture from the unit specified in sampler parameters. |
112 | //! Also unbinds Sampler Object if it is allocated. |
113 | void Unbind (const Handle(OpenGl_Context)& theCtx) const |
114 | { |
115 | Unbind (theCtx, mySampler->Parameters()->TextureUnit()); |
116 | } |
117 | |
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118 | //! Bind this Texture to specified unit. |
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119 | //! Also binds Sampler Object if it is allocated. |
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120 | Standard_EXPORT void Bind (const Handle(OpenGl_Context)& theCtx, |
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121 | const Graphic3d_TextureUnit theTextureUnit) const; |
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122 | |
123 | //! Unbind texture from specified unit. |
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124 | //! Also unbinds Sampler Object if it is allocated. |
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125 | Standard_EXPORT void Unbind (const Handle(OpenGl_Context)& theCtx, |
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126 | const Graphic3d_TextureUnit theTextureUnit) const; |
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127 | |
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128 | //! Revision of associated data source. |
129 | Standard_Size Revision() const { return myRevision; } |
130 | |
131 | //! Set revision of associated data source. |
132 | void SetRevision (const Standard_Size theRevision) { myRevision = theRevision; } |
133 | |
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134 | //! Notice that texture will be unbound after this call. |
135 | Standard_EXPORT bool Init (const Handle(OpenGl_Context)& theCtx, |
136 | const Image_PixMap& theImage, |
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137 | const Graphic3d_TypeOfTexture theType, |
138 | const Standard_Boolean theIsColorMap); |
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139 | |
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140 | //! Initialize the texture with specified format, size and texture type. |
141 | //! If theImage is empty the texture data will contain trash. |
142 | //! Notice that texture will be unbound after this call. |
143 | Standard_EXPORT bool Init (const Handle(OpenGl_Context)& theCtx, |
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144 | const OpenGl_TextureFormat& theFormat, |
145 | const Graphic3d_Vec2i& theSizeXY, |
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146 | const Graphic3d_TypeOfTexture theType, |
147 | const Image_PixMap* theImage = NULL); |
148 | |
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149 | //! Initialize the texture with Graphic3d_TextureMap. |
150 | //! It is an universal way to initialize. |
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151 | //! Suitable initialization method will be chosen. |
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152 | Standard_EXPORT bool Init (const Handle(OpenGl_Context)& theCtx, |
153 | const Handle(Graphic3d_TextureMap)& theTextureMap); |
154 | |
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155 | //! Initialize the texture with Image_CompressedPixMap. |
156 | Standard_EXPORT bool InitCompressed (const Handle(OpenGl_Context)& theCtx, |
157 | const Image_CompressedPixMap& theImage, |
158 | const Standard_Boolean theIsColorMap); |
159 | |
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160 | //! Initialize the 2D multisampling texture using glTexImage2DMultisample(). |
161 | Standard_EXPORT bool Init2DMultisample (const Handle(OpenGl_Context)& theCtx, |
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162 | const Standard_Integer theNbSamples, |
163 | const Standard_Integer theTextFormat, |
164 | const Standard_Integer theSizeX, |
165 | const Standard_Integer theSizeY); |
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166 | |
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167 | //! Allocates texture rectangle with specified format and size. |
168 | //! \note Texture data is not initialized (will contain trash). |
169 | Standard_EXPORT bool InitRectangle (const Handle(OpenGl_Context)& theCtx, |
170 | const Standard_Integer theSizeX, |
171 | const Standard_Integer theSizeY, |
172 | const OpenGl_TextureFormat& theFormat); |
173 | |
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174 | //! Initializes 3D texture rectangle with specified format and size. |
175 | Standard_EXPORT bool Init3D (const Handle(OpenGl_Context)& theCtx, |
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176 | const OpenGl_TextureFormat& theFormat, |
177 | const Graphic3d_Vec3i& theSizeXYZ, |
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178 | const void* thePixels); |
179 | |
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180 | //! @return true if texture was generated within mipmaps |
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181 | Standard_Boolean HasMipmaps() const { return myMaxMipLevel > 0; } |
182 | |
183 | //! Return upper mipmap level index (0 means no mipmaps). |
184 | Standard_Integer MaxMipmapLevel() const { return myMaxMipLevel; } |
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185 | |
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186 | //! Return number of MSAA samples. |
187 | Standard_Integer NbSamples() const { return myNbSamples; } |
188 | |
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189 | //! Returns estimated GPU memory usage for holding data without considering overheads and allocation alignment rules. |
190 | Standard_EXPORT virtual Standard_Size EstimatedDataSize() const Standard_OVERRIDE; |
191 | |
192 | //! Returns TRUE for point sprite texture. |
193 | virtual bool IsPointSprite() const { return false; } |
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194 | |
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195 | //! Auxiliary method for making an image dump from texture data. |
196 | //! @param theImage [out] result image data (will be overridden) |
197 | //! @param theCtx [in] active GL context |
198 | //! @param theTexUnit [in] texture slot to use |
199 | //! @param theLevel [in] mipmap level to dump |
200 | //! @param theCubeSide [in] cubemap side to dump within [0, 5] range |
201 | //! @return FALSE on error |
202 | Standard_EXPORT bool ImageDump (Image_PixMap& theImage, |
203 | const Handle(OpenGl_Context)& theCtx, |
204 | Graphic3d_TextureUnit theTexUnit, |
205 | Standard_Integer theLevel = 0, |
206 | Standard_Integer theCubeSide = 0) const; |
207 | |
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208 | public: |
209 | |
210 | Standard_DEPRECATED("Deprecated method, OpenGl_TextureFormat::FindFormat() should be used instead") |
211 | static bool GetDataFormat (const Handle(OpenGl_Context)& theCtx, |
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212 | const Image_Format theFormat, |
213 | Standard_Integer& theTextFormat, |
214 | unsigned int& thePixelFormat, |
215 | unsigned int& theDataType) |
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216 | { |
217 | OpenGl_TextureFormat aFormat = OpenGl_TextureFormat::FindFormat (theCtx, theFormat, false); |
218 | theTextFormat = aFormat.InternalFormat(); |
219 | thePixelFormat = aFormat.PixelFormat(); |
220 | theDataType = aFormat.DataType(); |
221 | return aFormat.IsValid(); |
222 | } |
223 | |
224 | Standard_DEPRECATED("Deprecated method, OpenGl_TextureFormat::FindFormat() should be used instead") |
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225 | static bool GetDataFormat (const Handle(OpenGl_Context)& theCtx, |
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226 | const Image_PixMap& theData, |
227 | Standard_Integer& theTextFormat, |
228 | unsigned int& thePixelFormat, |
229 | unsigned int& theDataType) |
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230 | { |
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231 | OpenGl_TextureFormat aFormat = OpenGl_TextureFormat::FindFormat (theCtx, theData.Format(), false); |
232 | theTextFormat = aFormat.InternalFormat(); |
233 | thePixelFormat = aFormat.PixelFormat(); |
234 | theDataType = aFormat.DataType(); |
235 | return aFormat.IsValid(); |
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236 | } |
237 | |
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238 | Standard_DEPRECATED("Deprecated method, OpenGl_TextureFormat should be passed instead of separate parameters") |
239 | bool Init (const Handle(OpenGl_Context)& theCtx, |
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240 | const Standard_Integer theTextFormat, |
241 | const unsigned int thePixelFormat, |
242 | const unsigned int theDataType, |
243 | const Standard_Integer theSizeX, |
244 | const Standard_Integer theSizeY, |
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245 | const Graphic3d_TypeOfTexture theType, |
246 | const Image_PixMap* theImage = NULL) |
247 | { |
248 | OpenGl_TextureFormat aFormat; |
249 | aFormat.SetInternalFormat (theTextFormat); |
250 | aFormat.SetPixelFormat (thePixelFormat); |
251 | aFormat.SetDataType (theDataType); |
252 | return Init (theCtx, aFormat, Graphic3d_Vec2i (theSizeX, theSizeY), theType, theImage); |
253 | } |
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254 | |
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255 | Standard_DEPRECATED("Deprecated method, theIsColorMap parameter should be explicitly specified") |
256 | bool Init (const Handle(OpenGl_Context)& theCtx, |
257 | const Image_PixMap& theImage, |
258 | const Graphic3d_TypeOfTexture theType) |
259 | { |
260 | return Init (theCtx, theImage, theType, true); |
261 | } |
262 | |
263 | Standard_DEPRECATED("Deprecated method, OpenGl_TextureFormat should be passed instead of separate parameters") |
264 | bool Init3D (const Handle(OpenGl_Context)& theCtx, |
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265 | const Standard_Integer theTextFormat, |
266 | const unsigned int thePixelFormat, |
267 | const unsigned int theDataType, |
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268 | const Standard_Integer theSizeX, |
269 | const Standard_Integer theSizeY, |
270 | const Standard_Integer theSizeZ, |
271 | const void* thePixels) |
272 | { |
273 | OpenGl_TextureFormat aFormat; |
274 | aFormat.SetInternalFormat (theTextFormat); |
275 | aFormat.SetPixelFormat (thePixelFormat); |
276 | aFormat.SetDataType (theDataType); |
277 | return Init3D (theCtx, aFormat, Graphic3d_Vec3i (theSizeX, theSizeY, theSizeZ), thePixels); |
278 | } |
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279 | |
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280 | //! Initializes 6 sides of cubemap. |
281 | //! If theCubeMap is not NULL then size and format will be taken from it and corresponding arguments will be ignored. |
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282 | //! Otherwise this parameters will be taken from arguments. |
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283 | //! @param theCtx [in] active OpenGL context |
284 | //! @param theCubeMap [in] cubemap definition, can be NULL |
285 | //! @param theSize [in] cubemap dimensions |
286 | //! @param theFormat [in] image format |
287 | //! @param theToGenMipmap [in] flag to generate mipmaped cubemap |
288 | //! @param theIsColorMap [in] flag indicating cubemap storing color values |
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289 | Standard_EXPORT bool InitCubeMap (const Handle(OpenGl_Context)& theCtx, |
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290 | const Handle(Graphic3d_CubeMap)& theCubeMap, |
291 | Standard_Size theSize, |
292 | Image_Format theFormat, |
293 | Standard_Boolean theToGenMipmap, |
294 | Standard_Boolean theIsColorMap); |
295 | |
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296 | protected: |
297 | |
298 | //! Apply default sampler parameters after texture creation. |
299 | Standard_EXPORT void applyDefaultSamplerParams (const Handle(OpenGl_Context)& theCtx); |
300 | |
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301 | protected: |
302 | |
303 | Handle(OpenGl_Sampler) mySampler; //!< texture sampler |
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304 | Standard_Size myRevision; //!< revision of associated data source |
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305 | unsigned int myTextureId; //!< GL resource ID |
306 | unsigned int myTarget; //!< GL_TEXTURE_1D/GL_TEXTURE_2D/GL_TEXTURE_3D |
307 | Standard_Integer mySizeX; //!< texture width |
308 | Standard_Integer mySizeY; //!< texture height |
309 | Standard_Integer mySizeZ; //!< texture depth |
310 | unsigned int myTextFormat; //!< texture format - GL_RGB, GL_RGBA,... |
311 | Standard_Integer mySizedFormat;//!< internal (sized) texture format |
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312 | Standard_Integer myNbSamples; //!< number of MSAA samples |
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313 | Standard_Integer myMaxMipLevel;//!< upper mipmap level index (0 means no mipmaps) |
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314 | bool myIsAlpha; //!< indicates alpha format |
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315 | bool myIsTopDown; //!< indicates if 2D surface is defined top-down (TRUE) or bottom-up (FALSE) |
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316 | |
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317 | }; |
318 | |
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319 | DEFINE_STANDARD_HANDLE(OpenGl_Texture, OpenGl_NamedResource) |
320 | |
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321 | #endif // _OpenGl_Texture_H__ |