--- /dev/null
+// Copyright (C) 2010 Frederic Bouvier\r
+//\r
+// This library is free software; you can redistribute it and/or\r
+// modify it under the terms of the GNU Library General Public\r
+// License as published by the Free Software Foundation; either\r
+// version 2 of the License, or (at your option) any later version.\r
+//\r
+// This library is distributed in the hope that it will be useful,\r
+// but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\r
+// Library General Public License for more details.\r
+//\r
+// You should have received a copy of the GNU General Public License\r
+// along with this program; if not, write to the Free Software\r
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.\r
+\r
+#ifdef HAVE_CONFIG_H\r
+# include <simgear_config.h>\r
+#endif\r
+\r
+#include "mipmap.hxx"\r
+#include "EffectBuilder.hxx"\r
+\r
+#include <limits>\r
+\r
+#include <osg/Image>\r
+#include <osg/Vec4>\r
+\r
+#include <boost/lexical_cast.hpp>\r
+#include <boost/tuple/tuple_comparison.hpp>\r
+\r
+namespace simgear { namespace effect {\r
+\r
+EffectNameValue<MipMapFunction> mipmapFunctionsInit[] =\r
+{\r
+ {"auto", AUTOMATIC},\r
+ {"average", AVERAGE},\r
+ {"sum", SUM},\r
+ {"product", PRODUCT},\r
+ {"min", MIN},\r
+ {"max", MAX}\r
+};\r
+EffectPropertyMap<MipMapFunction> mipmapFunctions(mipmapFunctionsInit);\r
+\r
+MipMapTuple makeMipMapTuple(Effect* effect, const SGPropertyNode* props,\r
+ const SGReaderWriterXMLOptions* options)\r
+{\r
+ const SGPropertyNode* pMipmapR\r
+ = getEffectPropertyChild(effect, props, "function-r");\r
+ MipMapFunction mipmapR = AUTOMATIC;\r
+ if (pMipmapR)\r
+ findAttr(mipmapFunctions, pMipmapR, mipmapR);\r
+ const SGPropertyNode* pMipmapG\r
+ = getEffectPropertyChild(effect, props, "function-g");\r
+ MipMapFunction mipmapG = AUTOMATIC;\r
+ if (pMipmapG)\r
+ findAttr(mipmapFunctions, pMipmapG, mipmapG);\r
+ const SGPropertyNode* pMipmapB\r
+ = getEffectPropertyChild(effect, props, "function-b");\r
+ MipMapFunction mipmapB = AUTOMATIC;\r
+ if (pMipmapB)\r
+ findAttr(mipmapFunctions, pMipmapB, mipmapB);\r
+ const SGPropertyNode* pMipmapA\r
+ = getEffectPropertyChild(effect, props, "function-a");\r
+ MipMapFunction mipmapA = AUTOMATIC;\r
+ if (pMipmapA)\r
+ findAttr(mipmapFunctions, pMipmapA, mipmapA);\r
+ return MipMapTuple( mipmapR, mipmapG, mipmapB, mipmapA );\r
+}\r
+\r
+\r
+unsigned char* imageData(unsigned char* ptr, GLenum pixelFormat, GLenum dataType, int width, int height, int packing, int column, int row=0, int image=0)\r
+{\r
+ if (!ptr) return NULL;\r
+ return ptr +\r
+ ( column * osg::Image::computePixelSizeInBits( pixelFormat, dataType ) ) / 8 +\r
+ row * osg::Image::computeRowWidthInBytes( width, pixelFormat, dataType, packing ) +\r
+ image * height * osg::Image::computeRowWidthInBytes( width, pixelFormat, dataType, packing );\r
+}\r
+\r
+template <typename T>\r
+void _writeColor(GLenum pixelFormat, T* data, float scale, osg::Vec4 value)\r
+{\r
+ switch(pixelFormat)\r
+ {\r
+ case(GL_DEPTH_COMPONENT): //intentionally fall through and execute the code for GL_LUMINANCE\r
+ case(GL_LUMINANCE): { *data++ = value.r()*scale; break; }\r
+ case(GL_ALPHA): { *data++ = value.a()*scale; break; }\r
+ case(GL_LUMINANCE_ALPHA): { *data++ = value.r()*scale; *data++ = value.a()*scale; break; }\r
+ case(GL_RGB): { *data++ = value.r()*scale; *data++ = value.g()*scale; *data++ = value.b()*scale; break; }\r
+ case(GL_RGBA): { *data++ = value.r()*scale; *data++ = value.g()*scale; *data++ = value.b()*scale; *data++ = value.a()*scale; break; }\r
+ case(GL_BGR): { *data++ = value.b()*scale; *data++ = value.g()*scale; *data++ = value.r()*scale; break; }\r
+ case(GL_BGRA): { *data++ = value.b()*scale; *data++ = value.g()*scale; *data++ = value.r()*scale; *data++ = value.a()*scale; break; }\r
+ }\r
+}\r
+\r
+void setColor(unsigned char *ptr, GLenum pixelFormat, GLenum dataType, osg::Vec4 color)\r
+{\r
+ switch(dataType)\r
+ {\r
+ case(GL_BYTE): return _writeColor(pixelFormat, (char*)ptr, 128.0f, color);\r
+ case(GL_UNSIGNED_BYTE): return _writeColor(pixelFormat, (unsigned char*)ptr, 255.0f, color);\r
+ case(GL_SHORT): return _writeColor(pixelFormat, (short*)ptr, 32768.0f, color);\r
+ case(GL_UNSIGNED_SHORT): return _writeColor(pixelFormat, (unsigned short*)ptr, 65535.0f, color);\r
+ case(GL_INT): return _writeColor(pixelFormat, (int*)ptr, 2147483648.0f, color);\r
+ case(GL_UNSIGNED_INT): return _writeColor(pixelFormat, (unsigned int*)ptr, 4294967295.0f, color);\r
+ case(GL_FLOAT): return _writeColor(pixelFormat, (float*)ptr, 1.0f, color);\r
+ }\r
+}\r
+\r
+template <typename T> \r
+osg::Vec4 _readColor(GLenum pixelFormat, T* data,float scale)\r
+{\r
+ switch(pixelFormat)\r
+ {\r
+ case(GL_DEPTH_COMPONENT): //intentionally fall through and execute the code for GL_LUMINANCE\r
+ case(GL_LUMINANCE): { float l = float(*data++)*scale; return osg::Vec4(l, l, l, 1.0f); }\r
+ case(GL_ALPHA): { float a = float(*data++)*scale; return osg::Vec4(1.0f, 1.0f, 1.0f, a); }\r
+ case(GL_LUMINANCE_ALPHA): { float l = float(*data++)*scale; float a = float(*data++)*scale; return osg::Vec4(l,l,l,a); }\r
+ case(GL_RGB): { float r = float(*data++)*scale; float g = float(*data++)*scale; float b = float(*data++)*scale; return osg::Vec4(r,g,b,1.0f); }\r
+ case(GL_RGBA): { float r = float(*data++)*scale; float g = float(*data++)*scale; float b = float(*data++)*scale; float a = float(*data++)*scale; return osg::Vec4(r,g,b,a); }\r
+ case(GL_BGR): { float b = float(*data++)*scale; float g = float(*data++)*scale; float r = float(*data++)*scale; return osg::Vec4(r,g,b,1.0f); }\r
+ case(GL_BGRA): { float b = float(*data++)*scale; float g = float(*data++)*scale; float r = float(*data++)*scale; float a = float(*data++)*scale; return osg::Vec4(r,g,b,a); }\r
+ }\r
+ return osg::Vec4(1.0f,1.0f,1.0f,1.0f);\r
+}\r
+\r
+osg::Vec4 getColor(const unsigned char* ptr, GLenum pixelFormat, GLenum dataType)\r
+{\r
+ switch(dataType)\r
+ {\r
+ case(GL_BYTE): return _readColor(pixelFormat, (char*)ptr, 1.0f/128.0f);\r
+ case(GL_UNSIGNED_BYTE): return _readColor(pixelFormat, (unsigned char*)ptr, 1.0f/255.0f);\r
+ case(GL_SHORT): return _readColor(pixelFormat, (short*)ptr, 1.0f/32768.0f);\r
+ case(GL_UNSIGNED_SHORT): return _readColor(pixelFormat, (unsigned short*)ptr, 1.0f/65535.0f);\r
+ case(GL_INT): return _readColor(pixelFormat, (int*)ptr, 1.0f/2147483648.0f);\r
+ case(GL_UNSIGNED_INT): return _readColor(pixelFormat, (unsigned int*)ptr, 1.0f/4294967295.0f);\r
+ case(GL_FLOAT): return _readColor(pixelFormat, (float*)ptr, 1.0f);\r
+ }\r
+ return osg::Vec4(1.0f,1.0f,1.0f,1.0f);\r
+}\r
+\r
+osg::Vec4::value_type computeAverage( int c, osg::Vec4 colors[2][2][2], bool colorValid[2][2][2] )\r
+{\r
+ osg::Vec4::value_type r = 0;\r
+ osg::Vec4::value_type nb = 0;\r
+ for ( int k = 0; k < 2; ++k ) for ( int j = 0; j < 2; ++j ) for ( int i = 0; i < 2; ++i )\r
+ {\r
+ if ( colorValid[i][j][k] )\r
+ {\r
+ r += colors[i][j][k][c];\r
+ nb += 1;\r
+ }\r
+ }\r
+ return r / nb;\r
+}\r
+\r
+osg::Vec4::value_type computeSum( int c, osg::Vec4 colors[2][2][2], bool colorValid[2][2][2] )\r
+{\r
+ osg::Vec4::value_type r = 0;\r
+ for ( int k = 0; k < 2; ++k ) for ( int j = 0; j < 2; ++j ) for ( int i = 0; i < 2; ++i )\r
+ if ( colorValid[i][j][k] )\r
+ {\r
+ r += colors[i][j][k][c];\r
+ }\r
+ return r;\r
+}\r
+\r
+osg::Vec4::value_type computeProduct( int c, osg::Vec4 colors[2][2][2], bool colorValid[2][2][2] )\r
+{\r
+ osg::Vec4::value_type r = 1;\r
+ for ( int k = 0; k < 2; ++k ) for ( int j = 0; j < 2; ++j ) for ( int i = 0; i < 2; ++i )\r
+ if ( colorValid[i][j][k] )\r
+ {\r
+ r *= colors[i][j][k][c];\r
+ }\r
+ return r;\r
+}\r
+\r
+osg::Vec4::value_type computeMin( int c, osg::Vec4 colors[2][2][2], bool colorValid[2][2][2] )\r
+{\r
+ osg::Vec4::value_type r = std::numeric_limits<osg::Vec4::value_type>::max();\r
+ for ( int k = 0; k < 2; ++k ) for ( int j = 0; j < 2; ++j ) for ( int i = 0; i < 2; ++i )\r
+ if ( colorValid[i][j][k] )\r
+ {\r
+ r = std::min( r, colors[i][j][k][c] );\r
+ }\r
+ return r;\r
+}\r
+\r
+osg::Vec4::value_type computeMax( int c, osg::Vec4 colors[2][2][2], bool colorValid[2][2][2] )\r
+{\r
+ osg::Vec4::value_type r = std::numeric_limits<osg::Vec4::value_type>::min();\r
+ for ( int k = 0; k < 2; ++k ) for ( int j = 0; j < 2; ++j ) for ( int i = 0; i < 2; ++i )\r
+ if ( colorValid[i][j][k] )\r
+ {\r
+ r = std::max( r, colors[i][j][k][c] );\r
+ }\r
+ return r;\r
+}\r
+\r
+osg::Vec4::value_type computeComponent( int c, osg::Vec4 colors[2][2][2], bool colorValid[2][2][2], MipMapFunction f )\r
+{\r
+ switch ( f )\r
+ {\r
+ case AVERAGE: return computeAverage( c, colors, colorValid );\r
+ case SUM: return computeSum( c, colors, colorValid );\r
+ case PRODUCT: return computeProduct( c, colors, colorValid );\r
+ case MIN: return computeMin( c, colors, colorValid );\r
+ case MAX: return computeMax( c, colors, colorValid );\r
+ }\r
+ return 0;\r
+}\r
+\r
+osg::Vec4 computeColor( osg::Vec4 colors[2][2][2], bool colorValid[2][2][2], MipMapTuple attrs )\r
+{\r
+ osg::Vec4 result;\r
+ result[0] = computeComponent( 0, colors, colorValid, attrs.get<0>() );\r
+ result[1] = computeComponent( 1, colors, colorValid, attrs.get<1>() );\r
+ result[2] = computeComponent( 2, colors, colorValid, attrs.get<2>() );\r
+ result[3] = computeComponent( 3, colors, colorValid, attrs.get<3>() );\r
+ return result;\r
+}\r
+\r
+osg::Image* computeMipmap( osg::Image* image, MipMapTuple attrs )\r
+{\r
+ bool computeMipmap = false;\r
+ if ( attrs.get<0>() != AUTOMATIC &&\r
+ attrs.get<1>() != AUTOMATIC &&\r
+ attrs.get<2>() != AUTOMATIC &&\r
+ attrs.get<3>() != AUTOMATIC )\r
+ {\r
+ computeMipmap = true;\r
+ }\r
+ else if ( attrs.get<0>() != AUTOMATIC ||\r
+ attrs.get<1>() != AUTOMATIC ||\r
+ attrs.get<2>() != AUTOMATIC ||\r
+ attrs.get<3>() != AUTOMATIC )\r
+ {\r
+ throw BuilderException("invalid mipmap control function combination");\r
+ }\r
+\r
+ if ( computeMipmap )\r
+ {\r
+ osg::ref_ptr<osg::Image> mipmaps = new osg::Image();\r
+ int s = image->s(),\r
+ t = image->t(),\r
+ r = image->r();\r
+ int nb = osg::Image::computeNumberOfMipmapLevels(s, t, r);\r
+ osg::Image::MipmapDataType mipmapOffsets;\r
+ unsigned int offset = 0;\r
+ for ( int i = 0; i < nb; ++i )\r
+ {\r
+ offset += t * r * osg::Image::computeRowWidthInBytes(s, image->getPixelFormat(), image->getDataType(), image->getPacking());\r
+ mipmapOffsets.push_back( offset );\r
+ s >>= 1; if ( s == 0 ) s = 1;\r
+ t >>= 1; if ( t == 0 ) t = 1;\r
+ r >>= 1; if ( r == 0 ) r = 1;\r
+ }\r
+ mipmapOffsets.pop_back();\r
+ unsigned char *data = new unsigned char[offset];\r
+ memcpy( data, image->data(), mipmapOffsets.front() );\r
+ s = image->s();\r
+ t = image->t();\r
+ r = image->r();\r
+ for ( int m = 0; m < nb-1; ++m )\r
+ {\r
+ unsigned char *src = data;\r
+ if ( m > 0 )\r
+ src += mipmapOffsets[m-1];\r
+\r
+ unsigned char *dest = data + mipmapOffsets[m];\r
+\r
+ int ns = s >> 1; if ( ns == 0 ) ns = 1;\r
+ int nt = t >> 1; if ( nt == 0 ) nt = 1;\r
+ int nr = r >> 1; if ( nr == 0 ) nr = 1;\r
+\r
+ for ( int k = 0; k < r; k += 2 )\r
+ {\r
+ for ( int j = 0; j < t; j += 2 )\r
+ {\r
+ for ( int i = 0; i < s; i += 2 )\r
+ {\r
+ osg::Vec4 colors[2][2][2];\r
+ bool colorValid[2][2][2];\r
+ colorValid[0][0][0] = false; colorValid[0][0][1] = false; colorValid[0][1][0] = false; colorValid[0][1][1] = false;\r
+ colorValid[1][0][0] = false; colorValid[1][0][1] = false; colorValid[1][1][0] = false; colorValid[1][1][1] = false;\r
+ if ( true )\r
+ {\r
+ unsigned char *ptr = imageData( src, image->getPixelFormat(), image->getDataType(), s, t, image->getPacking(), i, j, k );\r
+ colors[0][0][0] = getColor( ptr, image->getPixelFormat(), image->getDataType() );\r
+ colorValid[0][0][0] = true;\r
+ }\r
+ if ( i + 1 < s )\r
+ {\r
+ unsigned char *ptr = imageData( src, image->getPixelFormat(), image->getDataType(), s, t, image->getPacking(), i + 1, j, k );\r
+ colors[0][0][1] = getColor( ptr, image->getPixelFormat(), image->getDataType() );\r
+ colorValid[0][0][1] = true;\r
+ }\r
+ if ( j + 1 < t )\r
+ {\r
+ unsigned char *ptr = imageData( src, image->getPixelFormat(), image->getDataType(), s, t, image->getPacking(), i, j + 1, k );\r
+ colors[0][1][0] = getColor( ptr, image->getPixelFormat(), image->getDataType() );\r
+ colorValid[0][1][0] = true;\r
+ }\r
+ if ( i + 1 < s && j + 1 < t )\r
+ {\r
+ unsigned char *ptr = imageData( src, image->getPixelFormat(), image->getDataType(), s, t, image->getPacking(), i + 1, j + 1, k );\r
+ colors[0][1][1] = getColor( ptr, image->getPixelFormat(), image->getDataType() );\r
+ colorValid[0][1][1] = true;\r
+ }\r
+ if ( k + 1 < r )\r
+ {\r
+ unsigned char *ptr = imageData( src, image->getPixelFormat(), image->getDataType(), s, t, image->getPacking(), i, j, k + 1 );\r
+ colors[1][0][0] = getColor( ptr, image->getPixelFormat(), image->getDataType() );\r
+ colorValid[1][0][0] = true;\r
+ }\r
+ if ( i + 1 < s && k + 1 < r )\r
+ {\r
+ unsigned char *ptr = imageData( src, image->getPixelFormat(), image->getDataType(), s, t, image->getPacking(), i + 1, j, k + 1 );\r
+ colors[1][0][1] = getColor( ptr, image->getPixelFormat(), image->getDataType() );\r
+ colorValid[1][0][1] = true;\r
+ }\r
+ if ( j + 1 < t && k + 1 < r )\r
+ {\r
+ unsigned char *ptr = imageData( src, image->getPixelFormat(), image->getDataType(), s, t, image->getPacking(), i, j + 1, k + 1 );\r
+ colors[1][1][0] = getColor( ptr, image->getPixelFormat(), image->getDataType() );\r
+ colorValid[1][1][0] = true;\r
+ }\r
+ if ( i + 1 < s && j + 1 < t && k + 1 < r )\r
+ {\r
+ unsigned char *ptr = imageData( src, image->getPixelFormat(), image->getDataType(), s, t, image->getPacking(), i + 1, j + 1, k + 1 );\r
+ colors[1][1][1] = getColor( ptr, image->getPixelFormat(), image->getDataType() );\r
+ colorValid[1][1][1] = true;\r
+ }\r
+\r
+ unsigned char *ptr = imageData( dest, image->getPixelFormat(), image->getDataType(), ns, nt, image->getPacking(), i/2, j/2, k/2 );\r
+ osg::Vec4 color = computeColor( colors, colorValid, attrs );\r
+ setColor( ptr, image->getPixelFormat(), image->getDataType(), color );\r
+ }\r
+ }\r
+ }\r
+ s = ns;\r
+ t = nt;\r
+ r = nr;\r
+ }\r
+ mipmaps->setImage( image->s(), image->t(), image->r(), \r
+ image->getInternalTextureFormat(), image->getPixelFormat(),\r
+ image->getDataType(), data, osg::Image::USE_NEW_DELETE, image->getPacking() );\r
+ mipmaps->setMipmapLevels( mipmapOffsets );\r
+\r
+ return mipmaps.release();\r
+ }\r
+ return image;\r
+}\r
+} }\r
projects / simgear.git / commitdiff