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<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>
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