diff options
Diffstat (limited to 'drivers/squish/colourset.cpp')
-rw-r--r-- | drivers/squish/colourset.cpp | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/drivers/squish/colourset.cpp b/drivers/squish/colourset.cpp deleted file mode 100644 index 97d29d9873..0000000000 --- a/drivers/squish/colourset.cpp +++ /dev/null @@ -1,121 +0,0 @@ -/* ----------------------------------------------------------------------------- - - Copyright (c) 2006 Simon Brown si@sjbrown.co.uk - - Permission is hereby granted, free of charge, to any person obtaining - a copy of this software and associated documentation files (the - "Software"), to deal in the Software without restriction, including - without limitation the rights to use, copy, modify, merge, publish, - distribute, sublicense, and/or sell copies of the Software, and to - permit persons to whom the Software is furnished to do so, subject to - the following conditions: - - The above copyright notice and this permission notice shall be included - in all copies or substantial portions of the Software. - - THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. - IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY - CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, - TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE - SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - - -------------------------------------------------------------------------- */ - -#include "colourset.h" - -namespace squish { - -ColourSet::ColourSet( u8 const* rgba, int mask, int flags ) - : m_count( 0 ), - m_transparent( false ) -{ - // check the compression mode for dxt1 - bool isDxt1 = ( ( flags & kDxt1 ) != 0 ); - bool weightByAlpha = ( ( flags & kWeightColourByAlpha ) != 0 ); - - // create the minimal set - for( int i = 0; i < 16; ++i ) - { - // check this pixel is enabled - int bit = 1 << i; - if( ( mask & bit ) == 0 ) - { - m_remap[i] = -1; - continue; - } - - // check for transparent pixels when using dxt1 - if( isDxt1 && rgba[4*i + 3] < 128 ) - { - m_remap[i] = -1; - m_transparent = true; - continue; - } - - // loop over previous points for a match - for( int j = 0;; ++j ) - { - // allocate a new point - if( j == i ) - { - // normalise coordinates to [0,1] - float x = ( float )rgba[4*i] / 255.0f; - float y = ( float )rgba[4*i + 1] / 255.0f; - float z = ( float )rgba[4*i + 2] / 255.0f; - - // ensure there is always non-zero weight even for zero alpha - float w = ( float )( rgba[4*i + 3] + 1 ) / 256.0f; - - // add the point - m_points[m_count] = Vec3( x, y, z ); - m_weights[m_count] = ( weightByAlpha ? w : 1.0f ); - m_remap[i] = m_count; - - // advance - ++m_count; - break; - } - - // check for a match - int oldbit = 1 << j; - bool match = ( ( mask & oldbit ) != 0 ) - && ( rgba[4*i] == rgba[4*j] ) - && ( rgba[4*i + 1] == rgba[4*j + 1] ) - && ( rgba[4*i + 2] == rgba[4*j + 2] ) - && ( rgba[4*j + 3] >= 128 || !isDxt1 ); - if( match ) - { - // get the index of the match - int index = m_remap[j]; - - // ensure there is always non-zero weight even for zero alpha - float w = ( float )( rgba[4*i + 3] + 1 ) / 256.0f; - - // map to this point and increase the weight - m_weights[index] += ( weightByAlpha ? w : 1.0f ); - m_remap[i] = index; - break; - } - } - } - - // square root the weights - for( int i = 0; i < m_count; ++i ) - m_weights[i] = std::sqrt( m_weights[i] ); -} - -void ColourSet::RemapIndices( u8 const* source, u8* target ) const -{ - for( int i = 0; i < 16; ++i ) - { - int j = m_remap[i]; - if( j == -1 ) - target[i] = 3; - else - target[i] = source[j]; - } -} - -} // namespace squish |