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doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> </center> +<hr><h1>texture_bump.cpp</h1><a href="texture__bump_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 +00007 <font class="comment">/* Copyright, 2000, 2001 Nevrax Ltd.</font> +00008 <font class="comment"> *</font> +00009 <font class="comment"> * This file is part of NEVRAX NEL.</font> +00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font> +00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font> +00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font> +00013 <font class="comment"> * any later version.</font> +00014 <font class="comment"></font> +00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font> +00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font> +00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font> +00018 <font class="comment"> * General Public License for more details.</font> +00019 <font class="comment"></font> +00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font> +00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font> +00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font> +00023 <font class="comment"> * MA 02111-1307, USA.</font> +00024 <font class="comment"> */</font> +00025 +00026 <font class="preprocessor">#include "<a class="code" href="std3d_8h.html">std3d.h</a>"</font> +00027 +00028 <font class="preprocessor">#include "<a class="code" href="texture__bump_8h.html">3d/texture_bump.h</a>"</font> +00029 +00030 +00031 <font class="keyword">namespace </font>NL3D { +00032 +00033 +00035 <font class="keyword">static</font> <font class="keywordtype">void</font> <a class="code" href="namespaceNL3D.html#a463">BuildDsDt</a>(uint32 *<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>, sint <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>, sint <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>, uint16 *dest, <font class="keywordtype">bool</font> absolute) +00036 { +00037 <font class="preprocessor"> #define GET_HGT(x, y) ((sint) ((src[(uint) (x) % width + ((uint) (y) % height) * width] & 0x00ff00) >> 8))</font> +00038 <font class="preprocessor"></font> sint <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>; +00039 <font class="keywordflow">for</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> = 0; <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> < <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>; ++<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>) +00040 { +00041 <font class="keywordflow">for</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> = 0; <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> < <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>; ++<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>) +00042 { +00043 sint off = <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> + <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> * <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>; +00044 sint16 ds = (sint16) (GET_HGT(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> + 1, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>) - GET_HGT(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> - 1, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>)); +00045 sint16 dt = (sint16) (GET_HGT(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> + 1) - GET_HGT(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> - 1)); +00046 +00047 <font class="keywordflow">if</font> (!absolute) +00048 { +00049 +00050 dest[off] = (uint16) ((ds & 0xff) | ((dt & 0xff) << 8)); +00051 } +00052 <font class="keywordflow">else</font> +00053 { +00054 dest[off] = (uint16) (abs(ds) | (abs(dt) << 8)); +00055 } +00056 } +00057 } +00058 } +00059 +00061 <font class="keyword">static</font> <font class="keywordtype">float</font> <a class="code" href="namespaceNL3D.html#a464">NormalizeDsDt</a>(uint16 *<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>, sint <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>, sint <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>, <font class="keywordtype">bool</font> absolute) +00062 { +00063 <font class="keyword">const</font> uint size = <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a> * <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>; +00064 uint highestDelta = 0; +00065 uint k; +00066 +00068 <font class="keywordflow">if</font> (absolute) +00069 { +00070 <font class="keywordflow">for</font> (k = 0; k < size; ++k) +00071 { +00072 highestDelta = std::max(highestDelta, (uint) (<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>[k] & 255)); +00073 highestDelta = std::max(highestDelta, (uint) <a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>[k] >> 8); +00074 } +00075 +00076 <font class="keywordflow">if</font> (highestDelta == 0) +00077 { +00078 <font class="keywordflow">return</font> 1.f; +00079 } +00080 <font class="keywordtype">float</font> normalizationFactor = 255.f / highestDelta; +00081 <font class="keywordflow">for</font> (k = 0; k < size; ++k) +00082 { +00083 uint8 du = (uint8) ((uint) (<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>[k] & 0xff) * normalizationFactor); +00084 uint16 dv = (uint16) (((uint) <a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>[k] >> 8) * normalizationFactor); +00085 <a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>[k] = (uint16) du | (dv << 8); +00086 } +00087 <font class="keywordflow">return</font> 1.f / normalizationFactor; +00088 } +00089 <font class="keywordflow">else</font> +00090 { +00091 <font class="keywordflow">for</font> (k = 0; k < size; ++k) +00092 { +00093 highestDelta = std::max(highestDelta, (uint) ::abs((sint) (sint8) (<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>[k] & 255))); +00094 highestDelta = std::max(highestDelta, (uint) ::abs((sint) (sint8) (<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>[k] >> 8))); +00095 } +00096 +00097 <font class="keywordflow">if</font> (highestDelta == 0) +00098 { +00099 <font class="keywordflow">return</font> 1.f; +00100 } +00101 <font class="keywordtype">float</font> normalizationFactor = 127.f / highestDelta; +00102 <font class="keywordflow">for</font> (k = 0; k < size; ++k) +00103 { +00104 <font class="keywordtype">float</font> fdu = (sint8) (<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>[k] & 255) * normalizationFactor; +00105 <font class="keywordtype">float</font> fdv = (sint8) (<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>[k] >> 8) * normalizationFactor; +00106 <a class="code" href="namespaceNLMISC.html#a215">NLMISC::clamp</a>(fdu, -128, 127); +00107 <a class="code" href="namespaceNLMISC.html#a215">NLMISC::clamp</a>(fdv, -128, 127); +00108 uint8 du = (uint8) (sint8) fdu; +00109 uint8 dv = (uint8) (sint8) fdv; +00110 <a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>[k] = (uint16) du | (((uint16) dv) << 8); +00111 } +00112 <font class="keywordflow">return</font> 1.f / normalizationFactor; +00113 } +00114 } +00115 +00116 +00117 +00118 <font class="comment">/*</font> +00119 <font class="comment"> * Constructor</font> +00120 <font class="comment"> */</font> +<a name="l00121"></a><a class="code" href="classNL3D_1_1CTextureBump.html#a1">00121</a> CTextureBump::CTextureBump() : _NormalizationFactor(0.f), +00122 _DisableSharing(false), +00123 _UseAbsoluteOffsets(false), +00124 _ForceNormalize(true) +00125 { +00126 <font class="comment">// mipmapping not supported for now, disable it</font> +00127 ITexture::setFilterMode(ITexture::Linear, ITexture::LinearMipMapOff); +00128 } +00129 +<a name="l00131"></a><a class="code" href="classNL3D_1_1CTextureBump.html#c0">00131</a> <font class="keywordtype">void</font> CTextureBump::setFilterMode(TMagFilter magf, TMinFilter minf) +00132 { +00133 <a class="code" href="debug_8h.html#a12">nlstop</a>; <font class="comment">// set filter mode not allowed with bump textures (not supported by some GPUs)</font> +00134 } +00135 +<a name="l00136"></a><a class="code" href="classNL3D_1_1CTextureBump.html#a2">00136</a> <font class="keywordtype">void</font> CTextureBump::setHeightMap(ITexture *heightMap) +00137 { +00138 <font class="keywordflow">if</font> (heightMap != <a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>) +00139 { +00140 <a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a> = heightMap; +00141 <a class="code" href="classNL3D_1_1ITexture.html#a0">touch</a>(); +00142 } +00143 } +00144 +00145 +<a name="l00147"></a><a class="code" href="classNL3D_1_1CTextureBump.html#a5">00147</a> <font class="keywordtype">void</font> CTextureBump::serial(<a class="code" href="classNLMISC_1_1IStream.html">NLMISC::IStream</a> &f) <font class="keywordflow">throw</font>(NLMISC::EStream) +00148 { +00150 sint ver = f.serialVersion(2); +00151 ITexture::serial(f); +00152 ITexture *tex = NULL; +00153 <font class="keywordflow">if</font> (f.isReading()) +00154 { +00155 f.serialPolyPtr(tex); +00156 _HeightMap = tex; +00157 touch(); +00158 } +00159 <font class="keywordflow">else</font> +00160 { +00161 tex = _HeightMap; +00162 f.serialPolyPtr(tex); +00163 } +00164 f.serial(_DisableSharing); +00165 <font class="keywordflow">if</font> (ver >= 1) +00166 { +00167 f.serial(_UseAbsoluteOffsets); +00168 } +00169 <font class="keywordflow">if</font> (ver >= 2) +00170 { +00171 f.serial(_ForceNormalize); +00172 } +00173 } +00174 +<a name="l00176"></a><a class="code" href="classNL3D_1_1CTextureBump.html#b0">00176</a> <font class="keywordtype">void</font> CTextureBump::doGenerate() +00177 { +00178 <font class="keywordflow">if</font> (!<a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>) +00179 { +00180 <a class="code" href="classNLMISC_1_1CBitmap.html#a3">makeDummy</a>(); +00181 <font class="keywordflow">return</font>; +00182 } +00183 <font class="comment">// generate the height map</font> +00184 <a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->generate(); +00185 <font class="keywordflow">if</font> (!<a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->convertToType(CBitmap::RGBA)) +00186 { +00187 <a class="code" href="classNLMISC_1_1CBitmap.html#a3">makeDummy</a>(); +00188 <font class="keywordflow">return</font>; +00189 } +00190 <a class="code" href="classNLMISC_1_1CBitmap.html#a12">releaseMipMaps</a>(); +00191 uint <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a> = <a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->getWidth(); +00192 uint <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a> = <a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->getHeight(); +00193 CBitmap::resize(<a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->getWidth(), <a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->getHeight(), CBitmap::DsDt); +00194 <font class="comment">// build the DsDt map</font> +00195 <a class="code" href="namespaceNL3D.html#a463">BuildDsDt</a>((uint32 *) &(<a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->getPixels()[0]), <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>, (uint16 *) &(<a class="code" href="classNLMISC_1_1CBitmap.html#z277_0">getPixels</a>()[0]), <a class="code" href="classNL3D_1_1CTextureBump.html#n3">_UseAbsoluteOffsets</a>); +00196 +00197 <font class="comment">// Normalize the map if needed</font> +00198 <font class="keywordflow">if</font> (_ForceNormalize) +00199 { +00200 <a class="code" href="classNL3D_1_1CTextureBump.html#n1">_NormalizationFactor</a> = <a class="code" href="namespaceNL3D.html#a464">NormalizeDsDt</a>((uint16 *) &(<a class="code" href="classNLMISC_1_1CBitmap.html#z277_0">getPixels</a>()[0]), <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>, <a class="code" href="classNL3D_1_1CTextureBump.html#n3">_UseAbsoluteOffsets</a>); +00201 } +00202 +00203 <font class="keywordflow">if</font> (<a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->getReleasable()) +00204 { +00205 <a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->release(); +00206 } +00207 } +00208 +<a name="l00210"></a><a class="code" href="classNL3D_1_1CTextureBump.html#a15">00210</a> <font class="keywordtype">void</font> CTextureBump::release() +00211 { +00212 ITexture::release(); +00213 <font class="keywordflow">if</font> (<a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a> != NULL) +00214 { +00215 <font class="keywordflow">if</font> (<a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->getReleasable()) +00216 { +00217 <a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->release(); +00218 } +00219 } +00220 } +00221 +00222 +<a name="l00224"></a><a class="code" href="classNL3D_1_1CTextureBump.html#a6">00224</a> <font class="keywordtype">bool</font> CTextureBump::supportSharing()<font class="keyword"> const</font> +00225 <font class="keyword"></font>{ +00226 <font class="keywordflow">return</font> !<a class="code" href="classNL3D_1_1CTextureBump.html#n2">_DisableSharing</a> && <a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a> && <a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->supportSharing(); +00227 } +00228 +00229 +<a name="l00231"></a><a class="code" href="classNL3D_1_1CTextureBump.html#a7">00231</a> std::string CTextureBump::getShareName()<font class="keyword"> const</font> +00232 <font class="keyword"></font>{ +00233 <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNL3D_1_1CTextureBump.html#a6">supportSharing</a>()); +00234 <font class="keywordflow">return</font> <font class="stringliteral">"BumpDsDt:"</font> + <a class="code" href="classNL3D_1_1CTextureBump.html#n0">_HeightMap</a>->getShareName(); +00235 } +00236 +00237 +00238 } <font class="comment">// NL3D</font> +</pre></div> + +<!-- footer --> +<BR><FONT Size=+5> </FONT> +</TD> +<TD WIDTH=15><IMG SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD> +</TR> +</TABLE> +</BODY> +</HTML> |