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69489e5e79
Author | SHA1 | Date |
---|---|---|
NRK | 69489e5e79 | |
Sean Barrett | ae721c50ea | |
Jeff Roberts (Bellevue) | 2fb057af65 | |
Jeff Roberts (Bellevue) | 1828f357dc | |
Sean Barrett | b7cf124628 | |
Jeff Roberts (Bellevue) | c59da6729e | |
Jeff Roberts (Bellevue) | 7f7e3469cf | |
Jeff Roberts (Bellevue) | 7a075fe7c7 | |
NRK | a570af1f27 |
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@ -1,4 +1,4 @@
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/* stb_image_resize2 - v2.04 - public domain image resizing
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/* stb_image_resize2 - v2.06 - public domain image resizing
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by Jeff Roberts (v2) and Jorge L Rodriguez
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http://github.com/nothings/stb
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@ -324,11 +324,15 @@
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Fabian Giesen: half float and srgb converters
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Sean Barrett: API design, optimizations
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Jorge L Rodriguez: Original 1.0 implementation
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Aras Pranckevicius: bugfixes for 1.0
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Aras Pranckevicius: bugfixes
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Nathan Reed: warning fixes for 1.0
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REVISIONS
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2.04 (2023-11-17) Fix for rare AVX bug, shadowed symbol (thanks Nikola Smiljanic).
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2.06 (2024-02-10) fix for indentical width/height 3x or more down-scaling
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undersampling a single row on rare resize ratios (about 1%)
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2.05 (2024-02-07) fix for 2 pixel to 1 pixel resizes with wrap (thanks Aras)
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fix for output callback (thanks Julien Koenen)
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2.04 (2023-11-17) fix for rare AVX bug, shadowed symbol (thanks Nikola Smiljanic).
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2.03 (2023-11-01) ASAN and TSAN warnings fixed, minor tweaks.
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2.00 (2023-10-10) mostly new source: new api, optimizations, simd, vertical-first, etc
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(2x-5x faster without simd, 4x-12x faster with simd)
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@ -3200,8 +3204,8 @@ static void stbir__calculate_in_pixel_range( int * first_pixel, int * last_pixel
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if ( edge == STBIR_EDGE_WRAP )
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{
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if ( first <= -input_size )
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first = -(input_size-1);
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if ( first < -input_size )
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first = -input_size;
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if ( last >= (input_size*2))
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last = (input_size*2) - 1;
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}
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@ -3392,6 +3396,12 @@ static void stbir__calculate_coefficients_for_gather_downsample( int start, int
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}
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}
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#ifdef STBIR_RENORMALIZE_IN_FLOAT
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#define STBIR_RENORM_TYPE float
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#else
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#define STBIR_RENORM_TYPE double
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#endif
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static void stbir__cleanup_gathered_coefficients( stbir_edge edge, stbir__filter_extent_info* filter_info, stbir__scale_info * scale_info, int num_contributors, stbir__contributors* contributors, float * coefficient_group, int coefficient_width )
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{
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int input_size = scale_info->input_full_size;
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@ -3413,14 +3423,14 @@ static void stbir__cleanup_gathered_coefficients( stbir_edge edge, stbir__filter
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for (n = 0; n < end; n++)
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{
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int i;
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float filter_scale, total_filter = 0;
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STBIR_RENORM_TYPE filter_scale, total_filter = 0;
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int e;
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// add all contribs
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e = contribs->n1 - contribs->n0;
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for( i = 0 ; i <= e ; i++ )
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{
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total_filter += coeffs[i];
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total_filter += (STBIR_RENORM_TYPE) coeffs[i];
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STBIR_ASSERT( ( coeffs[i] >= -2.0f ) && ( coeffs[i] <= 2.0f ) ); // check for wonky weights
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}
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@ -3436,10 +3446,11 @@ static void stbir__cleanup_gathered_coefficients( stbir_edge edge, stbir__filter
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// if the total isn't 1.0, rescale everything
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if ( ( total_filter < (1.0f-stbir__small_float) ) || ( total_filter > (1.0f+stbir__small_float) ) )
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{
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filter_scale = 1.0f / total_filter;
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filter_scale = ((STBIR_RENORM_TYPE)1.0) / total_filter;
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// scale them all
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for (i = 0; i <= e; i++)
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coeffs[i] *= filter_scale;
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coeffs[i] = (float) ( coeffs[i] * filter_scale );
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}
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}
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++contribs;
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@ -3560,7 +3571,9 @@ static void stbir__cleanup_gathered_coefficients( stbir_edge edge, stbir__filter
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filter_info->widest = widest;
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}
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static int stbir__pack_coefficients( int num_contributors, stbir__contributors* contributors, float * coefficents, int coefficient_width, int widest, int row_width )
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#undef STBIR_RENORM_TYPE
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static int stbir__pack_coefficients( int num_contributors, stbir__contributors* contributors, float * coefficents, int coefficient_width, int widest, int row0, int row1 )
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{
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#define STBIR_MOVE_1( dest, src ) { STBIR_NO_UNROLL(dest); ((stbir_uint32*)(dest))[0] = ((stbir_uint32*)(src))[0]; }
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#define STBIR_MOVE_2( dest, src ) { STBIR_NO_UNROLL(dest); ((stbir_uint64*)(dest))[0] = ((stbir_uint64*)(src))[0]; }
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@ -3569,6 +3582,10 @@ static int stbir__pack_coefficients( int num_contributors, stbir__contributors*
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#else
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#define STBIR_MOVE_4( dest, src ) { STBIR_NO_UNROLL(dest); ((stbir_uint64*)(dest))[0] = ((stbir_uint64*)(src))[0]; ((stbir_uint64*)(dest))[1] = ((stbir_uint64*)(src))[1]; }
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#endif
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int row_end = row1 + 1;
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STBIR__UNUSED( row0 ); // only used in an assert
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if ( coefficient_width != widest )
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{
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float * pc = coefficents;
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@ -3710,10 +3727,10 @@ static int stbir__pack_coefficients( int num_contributors, stbir__contributors*
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float * coeffs = coefficents + widest * ( num_contributors - 1 );
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// go until no chance of clipping (this is usually less than 8 lops)
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while ( ( contribs >= contributors ) && ( ( contribs->n0 + widest*2 ) >= row_width ) )
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while ( ( contribs >= contributors ) && ( ( contribs->n0 + widest*2 ) >= row_end ) )
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{
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// might we clip??
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if ( ( contribs->n0 + widest ) > row_width )
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if ( ( contribs->n0 + widest ) > row_end )
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{
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int stop_range = widest;
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@ -3732,15 +3749,15 @@ static int stbir__pack_coefficients( int num_contributors, stbir__contributors*
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}
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// now see if we still clip with the refined range
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if ( ( contribs->n0 + stop_range ) > row_width )
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if ( ( contribs->n0 + stop_range ) > row_end )
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{
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int new_n0 = row_width - stop_range;
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int new_n0 = row_end - stop_range;
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int num = contribs->n1 - contribs->n0 + 1;
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int backup = contribs->n0 - new_n0;
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float * from_co = coeffs + num - 1;
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float * to_co = from_co + backup;
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STBIR_ASSERT( ( new_n0 >= 0 ) && ( new_n0 < contribs->n0 ) );
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STBIR_ASSERT( ( new_n0 >= row0 ) && ( new_n0 < contribs->n0 ) );
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// move the coeffs over
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while( num )
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@ -3863,26 +3880,33 @@ static void stbir__calculate_filters( stbir__sampler * samp, stbir__sampler * ot
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for (k = gn0 ; k <= gn1 ; k++ )
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{
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float gc = *g_coeffs++;
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if ( ( k > highest_set ) || ( scatter_contributors->n0 > scatter_contributors->n1 ) )
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// skip zero and denormals - must skip zeros to avoid adding coeffs beyond scatter_coefficient_width
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// (which happens when pivoting from horizontal, which might have dummy zeros)
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if ( ( ( gc >= stbir__small_float ) || ( gc <= -stbir__small_float ) ) )
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{
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if ( ( k > highest_set ) || ( scatter_contributors->n0 > scatter_contributors->n1 ) )
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{
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// if we are skipping over several contributors, we need to clear the skipped ones
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stbir__contributors * clear_contributors = samp->contributors + ( highest_set + filter_pixel_margin + 1);
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while ( clear_contributors < scatter_contributors )
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{
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clear_contributors->n0 = 0;
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clear_contributors->n1 = -1;
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++clear_contributors;
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// if we are skipping over several contributors, we need to clear the skipped ones
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stbir__contributors * clear_contributors = samp->contributors + ( highest_set + filter_pixel_margin + 1);
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while ( clear_contributors < scatter_contributors )
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{
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clear_contributors->n0 = 0;
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clear_contributors->n1 = -1;
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++clear_contributors;
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}
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}
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scatter_contributors->n0 = n;
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scatter_contributors->n1 = n;
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scatter_coeffs[0] = gc;
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highest_set = k;
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}
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scatter_contributors->n0 = n;
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scatter_contributors->n1 = n;
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scatter_coeffs[0] = gc;
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highest_set = k;
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}
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else
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{
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stbir__insert_coeff( scatter_contributors, scatter_coeffs, n, gc );
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else
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{
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stbir__insert_coeff( scatter_contributors, scatter_coeffs, n, gc );
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}
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STBIR_ASSERT( ( scatter_contributors->n1 - scatter_contributors->n0 + 1 ) <= scatter_coefficient_width );
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}
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++scatter_contributors;
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scatter_coeffs += scatter_coefficient_width;
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@ -5958,7 +5982,7 @@ static void stbir__encode_scanline( stbir__info const * stbir_info, void *output
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// if we have an output callback, call it to send the data
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if ( stbir_info->out_pixels_cb )
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stbir_info->out_pixels_cb( output_buffer_data, num_pixels, row, stbir_info->user_data );
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stbir_info->out_pixels_cb( output_buffer, num_pixels, row, stbir_info->user_data );
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}
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@ -6352,15 +6376,31 @@ static void stbir__set_sampler(stbir__sampler * samp, stbir_filter filter, stbir
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// pre calculate stuff based on the above
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samp->coefficient_width = stbir__get_coefficient_width(samp, samp->is_gather, user_data);
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// filter_pixel_width is the conservative size in pixels of input that affect an output pixel.
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// In rare cases (only with 2 pix to 1 pix with the default filters), it's possible that the
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// filter will extend before or after the scanline beyond just one extra entire copy of the
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// scanline (we would hit the edge twice). We don't let you do that, so we clamp the total
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// width to 3x the total of input pixel (once for the scanline, once for the left side
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// overhang, and once for the right side). We only do this for edge mode, since the other
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// modes can just re-edge clamp back in again.
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if ( edge == STBIR_EDGE_WRAP )
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if ( samp->filter_pixel_width > ( scale_info->input_full_size * 2 ) ) // this can only happen when shrinking to a single pixel
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samp->filter_pixel_width = scale_info->input_full_size * 2;
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if ( samp->filter_pixel_width > ( scale_info->input_full_size * 3 ) )
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samp->filter_pixel_width = scale_info->input_full_size * 3;
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// This is how much to expand buffers to account for filters seeking outside
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// the image boundaries.
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samp->filter_pixel_margin = samp->filter_pixel_width / 2;
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// filter_pixel_margin is the amount that this filter can overhang on just one side of either
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// end of the scanline (left or the right). Since we only allow you to overhang 1 scanline's
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// worth of pixels, we clamp this one side of overhang to the input scanline size. Again,
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// this clamping only happens in rare cases with the default filters (2 pix to 1 pix).
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if ( edge == STBIR_EDGE_WRAP )
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if ( samp->filter_pixel_margin > scale_info->input_full_size )
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samp->filter_pixel_margin = scale_info->input_full_size;
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samp->num_contributors = stbir__get_contributors(samp, samp->is_gather);
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samp->contributors_size = samp->num_contributors * sizeof(stbir__contributors);
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samp->coefficients_size = samp->num_contributors * samp->coefficient_width * sizeof(float) + sizeof(float); // extra sizeof(float) is padding
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@ -6996,7 +7036,7 @@ static stbir__info * stbir__alloc_internal_mem_and_build_samplers( stbir__sample
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stbir__get_extents( horizontal, &info->scanline_extents );
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// pack the horizontal coeffs
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horizontal->coefficient_width = stbir__pack_coefficients(horizontal->num_contributors, horizontal->contributors, horizontal->coefficients, horizontal->coefficient_width, horizontal->extent_info.widest, info->scanline_extents.conservative.n1 + 1 );
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horizontal->coefficient_width = stbir__pack_coefficients(horizontal->num_contributors, horizontal->contributors, horizontal->coefficients, horizontal->coefficient_width, horizontal->extent_info.widest, info->scanline_extents.conservative.n0, info->scanline_extents.conservative.n1 );
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STBIR_MEMCPY( &info->horizontal, horizontal, sizeof( stbir__sampler ) );
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@ -511,7 +511,8 @@ static int stbi_write_bmp_core(stbi__write_context *s, int x, int y, int comp, c
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STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
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{
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stbi__write_context s = { 0 };
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stbi__write_context s;
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memset(&s, 0, sizeof(s));
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stbi__start_write_callbacks(&s, func, context);
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return stbi_write_bmp_core(&s, x, y, comp, data);
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}
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@ -519,7 +520,8 @@ STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x,
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#ifndef STBI_WRITE_NO_STDIO
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STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
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{
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stbi__write_context s = { 0 };
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stbi__write_context s;
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memset(&s, 0, sizeof(s));
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if (stbi__start_write_file(&s,filename)) {
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int r = stbi_write_bmp_core(&s, x, y, comp, data);
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stbi__end_write_file(&s);
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@ -610,7 +612,8 @@ static int stbi_write_tga_core(stbi__write_context *s, int x, int y, int comp, v
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STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
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{
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stbi__write_context s = { 0 };
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stbi__write_context s;
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memset(&s, 0, sizeof(s));
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stbi__start_write_callbacks(&s, func, context);
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return stbi_write_tga_core(&s, x, y, comp, (void *) data);
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}
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@ -618,7 +621,8 @@ STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x,
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#ifndef STBI_WRITE_NO_STDIO
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STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
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{
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stbi__write_context s = { 0 };
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stbi__write_context s;
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memset(&s, 0, sizeof(s));
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if (stbi__start_write_file(&s,filename)) {
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int r = stbi_write_tga_core(&s, x, y, comp, (void *) data);
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stbi__end_write_file(&s);
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@ -786,14 +790,16 @@ static int stbi_write_hdr_core(stbi__write_context *s, int x, int y, int comp, f
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STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
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{
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stbi__write_context s = { 0 };
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stbi__write_context s;
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memset(&s, 0, sizeof(s));
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stbi__start_write_callbacks(&s, func, context);
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return stbi_write_hdr_core(&s, x, y, comp, (float *) data);
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}
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STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
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{
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stbi__write_context s = { 0 };
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stbi__write_context s;
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memset(&s, 0, sizeof(s));
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if (stbi__start_write_file(&s,filename)) {
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int r = stbi_write_hdr_core(&s, x, y, comp, (float *) data);
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stbi__end_write_file(&s);
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|
@ -1606,7 +1612,8 @@ static int stbi_write_jpg_core(stbi__write_context *s, int width, int height, in
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STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
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{
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stbi__write_context s = { 0 };
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stbi__write_context s;
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memset(&s, 0, sizeof(s));
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stbi__start_write_callbacks(&s, func, context);
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return stbi_write_jpg_core(&s, x, y, comp, (void *) data, quality);
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}
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|
@ -1615,7 +1622,8 @@ STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x,
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#ifndef STBI_WRITE_NO_STDIO
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STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
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{
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stbi__write_context s = { 0 };
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||||
stbi__write_context s;
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memset(&s, 0, sizeof(s));
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if (stbi__start_write_file(&s,filename)) {
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int r = stbi_write_jpg_core(&s, x, y, comp, data, quality);
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||||
stbi__end_write_file(&s);
|
||||
|
|
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